Provide installable man pages

make docs: generate Markdown and man pages in doc/
make install-docs: install man pages to be usable directly

Docs are generated from the ezdoc files in doc/src/.

44 files changed, 0 insertions, 15434 deletions

diff --git a/guide/architecture.md b/guide/architecture.md
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@@ -1,52 +0,0 @@
-Architecture
-============
-
-Cowboy is a lightweight HTTP server.
-
-It is built on top of Ranch. Please see the Ranch guide for more
-information.
-
-One process per connection
---------------------------
-
-It uses only one process per connection. The process where your
-code runs is the process controlling the socket. Using one process
-instead of two allows for lower memory usage.
-
-Because there can be more than one request per connection with the
-keepalive feature of HTTP/1.1, that means the same process will be
-used to handle many requests.
-
-Because of this, you are expected to make sure your process cleans
-up before terminating the handling of the current request. This may
-include cleaning up the process dictionary, timers, monitoring and
-more.
-
-Binaries
---------
-
-It uses binaries. Binaries are more efficient than lists for
-representing strings because they take less memory space. Processing
-performance can vary depending on the operation. Binaries are known
-for generally getting a great boost if the code is compiled natively.
-Please see the HiPE documentation for more details.
-
-Date header
------------
-
-Because querying for the current date and time can be expensive,
-Cowboy generates one `Date` header value every second, shares it
-to all other processes, which then simply copy it in the response.
-This allows compliance with HTTP/1.1 with no actual performance loss.
-
-Max connections
----------------
-
-By default the maximum number of active connections is set to a
-generally accepted big enough number. This is meant to prevent having
-too many processes performing potentially heavy work and slowing
-everything else down, or taking up all the memory.
-
-Disabling this feature, by setting the `{max_connections, infinity}`
-protocol option, would give you greater performance when you are
-only processing short-lived requests.
diff --git a/guide/broken_clients.md b/guide/broken_clients.md
deleted file mode 100644
index ac9924c..0000000
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@@ -1,65 +0,0 @@
-Dealing with broken clients
-===========================
-
-There exists a very large number of implementations for the
-HTTP protocol. Most widely used clients, like browsers,
-follow the standard quite well, but others may not. In
-particular custom enterprise clients tend to be very badly
-written.
-
-Cowboy tries to follow the standard as much as possible,
-but is not trying to handle every possible special cases.
-Instead Cowboy focuses on the cases reported in the wild,
-on the public Web.
-
-That means clients that ignore the HTTP standard completely
-may fail to understand Cowboy's responses. There are of
-course workarounds. This chapter aims to cover them.
-
-Lowercase headers
------------------
-
-Cowboy converts all headers it receives to lowercase, and
-similarly sends back headers all in lowercase. Some broken
-HTTP clients have issues with that.
-
-A simple way to solve this is to create an `onresponse` hook
-that will format the header names with the expected case.
-
-``` erlang
-capitalize_hook(Status, Headers, Body, Req) ->
-    Headers2 = [{cowboy_bstr:capitalize_token(N), V}
-        || {N, V} <- Headers],
-    {ok, Req2} = cowboy_req:reply(Status, Headers2, Body, Req),
-    Req2.
-```
-
-Note that SPDY clients do not have that particular issue
-because the specification explicitly says all headers are
-lowercase, unlike HTTP which allows any case but treats
-them as case insensitive.
-
-Camel-case headers
-------------------
-
-Sometimes it is desirable to keep the actual case used by
-clients, for example when acting as a proxy between two broken
-implementations. There is no easy solution for this other than
-forking the project and editing the `cowboy_protocol` file
-directly.
-
-Chunked transfer-encoding
--------------------------
-
-Sometimes an HTTP client advertises itself as HTTP/1.1 but
-does not support chunked transfer-encoding. This is invalid
-behavior, as HTTP/1.1 clients are required to support it.
-
-A simple workaround exists in these cases. By changing the
-Req object response state to `waiting_stream`, Cowboy will
-understand that it must use the identity transfer-encoding
-when replying, just like if it was an HTTP/1.0 client.
-
-``` erlang
-Req2 = cowboy_req:set(resp_state, waiting_stream).
-```
diff --git a/guide/cookies.md b/guide/cookies.md
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index bfc8651..0000000
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-Using cookies
-=============
-
-Cookies are a mechanism allowing applications to maintain
-state on top of the stateless HTTP protocol.
-
-Cowboy provides facilities for handling cookies. It is highly
-recommended to use them instead of writing your own, as the
-implementation of cookies can vary greatly between clients.
-
-Cookies are stored client-side and sent with every subsequent
-request that matches the domain and path for which they were
-stored, including requests for static files. For this reason
-they can incur a cost which must be taken in consideration.
-
-Also consider that, regardless of the options used, cookies
-are not to be trusted. They may be read and modified by any
-program on the user's computer, but also by proxies. You
-should always validate cookie values before using them. Do
-not store any sensitive information in cookies either.
-
-When explicitly setting the domain, the cookie will be sent
-for the domain and all subdomains from that domain. Otherwise
-the current domain will be used. The same is true for the
-path.
-
-When the server sets cookies, they will only be available
-for requests that are sent after the client receives the
-response.
-
-Cookies are sent in HTTP headers, therefore they must have
-text values. It is your responsibility to encode any other
-data type. Also note that cookie names are de facto case
-sensitive.
-
-Cookies can be set for the client session (which generally
-means until the browser is closed), or it can be set for
-a number of seconds. Once it expires, or when the server
-says the cookie must exist for up to 0 seconds, the cookie
-is deleted by the client. To avoid this while the user
-is browsing your site, you should set the cookie for
-every request, essentially resetting the expiration time.
-
-Cookies can be restricted to secure channels. This typically
-means that such a cookie will only be sent over HTTPS,
-and that it will only be available by client-side scripts
-that run from HTTPS webpages.
-
-Finally, cookies can be restricted to HTTP and HTTPS requests,
-essentially disabling their access from client-side scripts.
-
-Setting cookies
----------------
-
-By default, cookies you set are defined for the session.
-
-``` erlang
-SessionID = generate_session_id(),
-Req2 = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, [], Req).
-```
-
-You can also make them expire at a specific point in the
-future.
-
-``` erlang
-SessionID = generate_session_id(),
-Req2 = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, [
-    {max_age, 3600}
-], Req).
-```
-
-You can delete cookies that have already been set. The value
-is ignored.
-
-``` erlang
-Req2 = cowboy_req:set_resp_cookie(<<"sessionid">>, <<>>, [
-    {max_age, 0}
-], Req).
-```
-
-You can restrict them to a specific domain and path.
-For example, the following cookie will be set for the domain
-`my.example.org` and all its subdomains, but only on the path
-`/account` and all its subdirectories.
-
-``` erlang
-Req2 = cowboy_req:set_resp_cookie(<<"inaccount">>, <<"1">>, [
-    {domain, "my.example.org"},
-    {path, "/account"}
-], Req).
-```
-
-You can restrict the cookie to secure channels, typically HTTPS.
-
-``` erlang
-SessionID = generate_session_id(),
-Req2 = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, [
-    {secure, true}
-], Req).
-```
-
-You can restrict the cookie to client-server communication
-only. Such a cookie will not be available to client-side scripts.
-
-``` erlang
-SessionID = generate_session_id(),
-Req2 = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, [
-    {http_only, true}
-], Req).
-```
-
-Cookies may also be set client-side, for example using
-Javascript.
-
-Reading cookies
----------------
-
-As we said, the client sends cookies with every request.
-But unlike the server, the client only sends the cookie
-name and value.
-
-You can read the value of a cookie.
-
-``` erlang
-{CookieVal, Req2} = cowboy_req:cookie(<<"lang">>, Req).
-```
-
-You can also get a default value returned when the cookie
-isn't set.
-
-``` erlang
-{CookieVal, Req2} = cowboy_req:cookie(<<"lang">>, Req, <<"fr">>).
-```
-
-And you can obtain all cookies at once as a list of
-key/value tuples.
-
-``` erlang
-{AllCookies, Req2} = cowboy_req:cookies(Req).
-```
diff --git a/guide/erlang_beginners.md b/guide/erlang_beginners.md
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-Erlang for beginners
-====================
-
-Chances are you are interested in using Cowboy, but have
-no idea how to write an Erlang program. Fear not! This
-chapter will help you get started.
-
-We recommend two books for beginners. You should read them
-both at some point, as they cover Erlang from two entirely
-different perspectives.
-
-Learn You Some Erlang for Great Good!
--------------------------------------
-
-The quickest way to get started with Erlang is by reading
-a book with the funny name of [LYSE](http://learnyousomeerlang.com),
-as we affectionately call it.
-
-It will get right into the syntax and quickly answer the questions
-a beginner would ask themselves, all the while showing funny
-pictures and making insightful jokes.
-
-You can read an early version of the book online for free,
-but you really should buy the much more refined paper and
-ebook versions.
-
-Programming Erlang
-------------------
-
-After writing some code, you will probably want to understand
-the very concepts that make Erlang what it is today. These
-are best explained by Joe Armstrong, the godfather of Erlang,
-in his book [Programming Erlang](http://pragprog.com/book/jaerlang2/programming-erlang).
-
-Instead of going into every single details of the language,
-Joe focuses on the central concepts behind Erlang, and shows
-you how they can be used to write a variety of different
-applications.
-
-At the time of writing, the 2nd edition of the book is in beta,
-and includes a few details about upcoming Erlang features that
-cannot be used today. Choose the edition you want, then get
-reading!
diff --git a/guide/erlang_web.md b/guide/erlang_web.md
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-Erlang and the Web
-==================
-
-The Web is concurrent
----------------------
-
-When you access a website there is little concurrency
-involved. A few connections are opened and requests
-are sent through these connections. Then the web page
-is displayed on your screen. Your browser will only
-open up to 4 or 8 connections to the server, depending
-on your settings. This isn't much.
-
-But think about it. You are not the only one accessing
-the server at the same time. There can be hundreds, if
-not thousands, if not millions of connections to the
-same server at the same time.
-
-Even today a lot of systems used in production haven't
-solved the C10K problem (ten thousand concurrent connections).
-And the ones who did are trying hard to get to the next
-step, C100K, and are pretty far from it.
-
-Erlang meanwhile has no problem handling millions of
-connections. At the time of writing there are application
-servers written in Erlang that can handle more than two
-million connections on a single server in a real production
-application, with spare memory and CPU!
-
-The Web is concurrent, and Erlang is a language designed
-for concurrency, so it is a perfect match.
-
-Of course, various platforms need to scale beyond a few
-million connections. This is where Erlang's built-in
-distribution mechanisms come in. If one server isn't
-enough, add more! Erlang allows you to use the same code
-for talking to local processes or to processes in other
-parts of your cluster, which means you can scale very
-quickly if the need arises.
-
-The Web has large userbases, and the Erlang platform was
-designed to work in a distributed setting, so it is a
-perfect match.
-
-Or is it? Surely you can find solutions to handle that many
-concurrent connections with your favorite language... But all
-these solutions will break down in the next few years. Why?
-Firstly because servers don't get any more powerful, they
-instead get a lot more cores and memory. This is only useful
-if your application can use them properly, and Erlang is
-light-years away from anything else in that area. Secondly,
-today your computer and your phone are online, tomorrow your
-watch, goggles, bike, car, fridge and tons of other devices
-will also connect to various applications on the Internet.
-
-Only Erlang is prepared to deal with what's coming.
-
-The Web is soft real time
--------------------------
-
-What does soft real time mean, you ask? It means we want the
-operations done as quickly as possible, and in the case of
-web applications, it means we want the data propagated fast.
-
-In comparison, hard real time has a similar meaning, but also
-has a hard time constraint, for example an operation needs to
-be done in under N milliseconds otherwise the system fails
-entirely.
-
-Users aren't that needy yet, they just want to get access
-to their content in a reasonable delay, and they want the
-actions they make to register at most a few seconds after
-they submitted them, otherwise they'll start worrying about
-whether it successfully went through.
-
-The Web is soft real time because taking longer to perform an
-operation would be seen as bad quality of service.
-
-Erlang is a soft real time system. It will always run
-processes fairly, a little at a time, switching to another
-process after a while and preventing a single process to
-steal resources from all others. This means that Erlang
-can guarantee stable low latency of operations.
-
-Erlang provides the guarantees that the soft real time Web
-requires.
-
-The Web is asynchronous
------------------------
-
-Long ago, the Web was synchronous because HTTP was synchronous.
-You fired a request, and then waited for a response. Not anymore.
-It all began when XmlHttpRequest started being used. It allowed
-the client to perform asynchronous calls to the server.
-
-Then Websocket appeared and allowed both the server and the client
-to send data to the other endpoint completely asynchronously. The
-data is contained within frames and no response is necessary.
-
-Erlang processes work the same. They send each other data contained
-within messages and then continue running without needing a response.
-They tend to spend most of their time inactive, waiting for a new
-message, and the Erlang VM happily activate them when one is received.
-
-It is therefore quite easy to imagine Erlang being good at receiving
-Websocket frames, which may come in at unpredictable times, pass the
-data to the responsible processes which are always ready waiting for
-new messages, and perform the operations required by only activating
-the required parts of the system.
-
-The more recent Web technologies, like Websocket of course, but also
-SPDY and HTTP/2.0, are all fully asynchronous protocols. The concept
-of requests and responses is retained of course, but anything could
-be sent in between, by both the client or the browser, and the
-responses could also be received in a completely different order.
-
-Erlang is by nature asynchronous and really good at it thanks to the
-great engineering that has been done in the VM over the years. It's
-only natural that it's so good at dealing with the asynchronous Web.
-
-The Web is omnipresent
-----------------------
-
-The Web has taken a very important part of our lives. We're
-connected at all times, when we're on our phone, using our computer,
-passing time using a tablet while in the bathroom... And this
-isn't going to slow down, every single device at home or on us
-will be connected.
-
-All these devices are always connected. And with the number of
-alternatives to give you access to the content you seek, users
-tend to not stick around when problems arise. Users today want
-their applications to be always available and if it's having
-too many issues they just move on.
-
-Despite this, when developers choose a product to use for building
-web applications, their only concern seem to be "Is it fast?",
-and they look around for synthetic benchmarks showing which one
-is the fastest at sending "Hello world" with only a handful
-concurrent connections. Web benchmarks haven't been representative
-of reality in a long time, and are drifting further away as
-time goes on.
-
-What developers should really ask themselves is "Can I service
-all my users with no interruption?" and they'd find that they have
-two choices. They can either hope for the best, or they can use
-Erlang.
-
-Erlang is built for fault tolerance. When writing code in any other
-language, you have to check all the return values and act accordingly
-to avoid any unforeseen issues. If you're lucky, you won't miss
-anything important. When writing Erlang code, you can just check
-the success condition and ignore all errors. If an error happen,
-the Erlang process crashes and is then restarted by a special
-process called a supervisor.
-
-The Erlang developer thus has no need to fear about unhandled
-errors, and can focus on handling only the errors that should
-give some feedback to the user and let the system take care of
-the rest. This also has the advantage of allowing him to write
-a lot less code, and letting him sleep at night.
-
-Erlang's fault tolerance oriented design is the first piece of
-what makes it the best choice for the omnipresent, always available
-Web.
-
-The second piece is Erlang's built-in distribution. Distribution
-is a key part of building a fault tolerant system, because it
-allows you to handle bigger failures, like a whole server going
-down, or even a data center entirely.
-
-Fault tolerance and distribution are important today, and will be
-vital in the future of the Web. Erlang is ready.
-
-Erlang is the ideal platform for the Web
-----------------------------------------
-
-Erlang provides all the important features that the Web requires
-or will require in the near future. Erlang is a perfect match
-for the Web, and it only makes sense to use it to build web
-applications.
diff --git a/guide/getting_started.md b/guide/getting_started.md
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-Getting started
-===============
-
-Erlang is more than a language, it is also an operating system
-for your applications. Erlang developers rarely write standalone
-modules, they write libraries or applications, and then bundle
-those into what is called a release. A release contains the
-Erlang VM plus all applications required to run the node, so
-it can be pushed to production directly.
-
-This chapter walks you through all the steps of setting up
-Cowboy, writing your first application and generating your first
-release. At the end of this chapter you should know everything
-you need to push your first Cowboy application to production.
-
-Application skeleton
---------------------
-
-Let's start by creating this application. We will simply call it
-`hello_erlang`. This application will have the following directory
-structure:
-
-```
-hello_erlang/
-    src/
-        hello_erlang.app.src
-        hello_erlang_app.erl
-        hello_erlang_sup.erl
-        hello_handler.erl
-    erlang.mk
-    Makefile
-    relx.config
-```
-
-Once the release is generated, we will also have the following
-files added:
-
-```
-hello_erlang/
-    ebin/
-        hello_erlang.app
-        hello_erlang_app.beam
-        hello_erlang_sup.beam
-        hello_handler.beam
-    _rel/
-    relx
-```
-
-As you can probably guess, the `.app.src` file end up becoming
-the `.app` file, and the `.erl` files are compiled into `.beam`.
-Then, the whole release will be copied into the `_rel/` directory.
-
-The `.app` file contains various informations about the application.
-It contains its name, a description, a version, a list of modules,
-default configuration and more.
-
-Using a build system like [erlang.mk](https://github.com/extend/erlang.mk),
-the list of modules will be included automatically in the `.app` file,
-so you don't need to manually put them in your `.app.src` file.
-
-For generating the release, we will use [relx](https://github.com/erlware/relx)
-as it is a much simpler alternative to the tool coming with Erlang.
-
-First, create the `hello_erlang` directory. It should have the same name
-as the application within it. Then we create the `src` directory inside
-it, which will contain the source code for our application.
-
-``` bash
-$ mkdir hello_erlang
-$ cd hello_erlang
-$ mkdir src
-```
-
-Let's first create the `hello_erlang.app.src` file. It should be pretty
-straightforward for the most part. You can use the following template
-and change what you like in it.
-
-``` erlang
-{application, hello_erlang, [
-    {description, "Hello world with Cowboy!"},
-    {vsn, "0.1.0"},
-    {modules, []},
-    {registered, [hello_erlang_sup]},
-    {applications, [
-        kernel,
-        stdlib,
-        cowboy
-    ]},
-    {mod, {hello_erlang_app, []}},
-    {env, []}
-]}.
-```
-
-The `modules` line will be replaced with the list of modules during
-compilation. Make sure to leave this line even if you do not use it
-directly.
-
-The `registered` value indicates which processes are registered by this
-application. You will often only register the top-level supervisor
-of the application.
-
-The `applications` value lists the applications that must be started
-for this application to work. The Erlang release will start all the
-applications listed here automatically.
-
-The `mod` value defines how the application should be started. Erlang
-will use the `hello_erlang_app` module for starting the application.
-
-The `hello_erlang_app` module is what we call an application behavior.
-The application behavior must define two functions: `start/2` and
-`stop/1`, for starting and stopping the application. A typical
-application module would look like this:
-
-``` erlang
--module(hello_erlang_app).
--behavior(application).
-
--export([start/2]).
--export([stop/1]).
-
-start(_Type, _Args) ->
-    hello_erlang_sup:start_link().
-
-stop(_State) ->
-    ok.
-```
-
-That's not enough however. Since we are building a Cowboy based
-application, we also need to initialize Cowboy when we start our
-application.
-
-Setting up Cowboy
------------------
-
-Cowboy does nothing by default.
-
-Cowboy uses Ranch for handling the connections and provides convenience
-functions to start Ranch listeners.
-
-The `cowboy:start_http/4` function starts a listener for HTTP connections
-using the TCP transport. The `cowboy:start_https/4` function starts a
-listener for HTTPS connections using the SSL transport.
-
-Listeners are a group of processes that are used to accept and manage
-connections. The processes used specifically for accepting connections
-are called acceptors. The number of acceptor processes is unrelated to
-the maximum number of connections Cowboy can handle. Please refer to
-the [Ranch guide](http://ninenines.eu/docs/en/ranch/HEAD/guide/)
-for in-depth information.
-
-Listeners are named. They spawn a given number of acceptors, listen for
-connections using the given transport options and pass along the protocol
-options to the connection processes. The protocol options must include
-the dispatch list for routing requests to handlers.
-
-The dispatch list is explained in greater details in the
-[Routing](routing.md) chapter. For the purpose of this example
-we will simply map all URLs to our handler `hello_handler`,
-using the wildcard `_` for both the hostname and path parts
-of the URL.
-
-This is what the `hello_erlang_app:start/2` function looks like
-with Cowboy initialized.
-
-``` erlang
-start(_Type, _Args) ->
-    Dispatch = cowboy_router:compile([
-        %% {URIHost, list({URIPath, Handler, Opts})}
-        {'_', [{'_', hello_handler, []}]}
-    ]),
-    %% Name, NbAcceptors, TransOpts, ProtoOpts
-    cowboy:start_http(my_http_listener, 100,
-        [{port, 8080}],
-        [{env, [{dispatch, Dispatch}]}]
-    ),
-    hello_erlang_sup:start_link().
-```
-
-Do note that we told Cowboy to start listening on port 8080.
-You can change this value if needed.
-
-Our application doesn't need to start any process, as Cowboy
-will automatically start processes for every incoming
-connections. We are still required to have a top-level supervisor
-however, albeit a fairly small one.
-
-``` erlang
--module(hello_erlang_sup).
--behavior(supervisor).
-
--export([start_link/0]).
--export([init/1]).
-
-start_link() ->
-    supervisor:start_link({local, ?MODULE}, ?MODULE, []).
-
-init([]) ->
-    {ok, {{one_for_one, 10, 10}, []}}.
-```
-
-Finally, we need to write the code for handling incoming requests.
-
-Handling HTTP requests
-----------------------
-
-Cowboy features many kinds of handlers. For this simple example,
-we will just use the plain HTTP handler, which has three callback
-functions: `init/3`, `handle/2` and `terminate/3`. You can find more
-information about the arguments and possible return values of these
-callbacks in the
-[cowboy_http_handler function reference](http://ninenines.eu/docs/en/cowboy/HEAD/manual/cowboy_http_handler).
-
-Our handler will only send a friendly hello back to the client.
-
-``` erlang
--module(hello_handler).
--behavior(cowboy_http_handler).
-
--export([init/3]).
--export([handle/2]).
--export([terminate/3]).
-
-init(_Type, Req, _Opts) ->
-    {ok, Req, undefined_state}.
-
-handle(Req, State) ->
-    {ok, Req2} = cowboy_req:reply(200, [
-        {<<"content-type">>, <<"text/plain">>}
-    ], <<"Hello World!">>, Req),
-    {ok, Req2, State}.
-
-terminate(_Reason, _Req, _State) ->
-    ok.
-```
-
-The `Req` variable above is the Req object, which allows the developer
-to obtain information about the request and to perform a reply.
-Its usage is documented in the
-[cowboy_req function reference](http://ninenines.eu/docs/en/cowboy/HEAD/manual/cowboy_req).
-
-The code for our application is ready, so let's build a release!
-
-Compiling
----------
-
-First we need to download `erlang.mk`.
-
-``` bash
-$ wget https://raw.github.com/extend/erlang.mk/master/erlang.mk
-$ ls
-src/
-erlang.mk
-```
-
-Then we need to create a Makefile that will include `erlang.mk`
-for building our application. We need to define the Cowboy
-dependency in the Makefile. Thankfully `erlang.mk` already
-knows where to find Cowboy as it features a package index,
-so we can just tell it to look there.
-
-``` Makefile
-PROJECT = hello_erlang
-
-DEPS = cowboy
-dep_cowboy = pkg://cowboy master
-
-include erlang.mk
-```
-
-Note that when creating production nodes you will most likely
-want to use a specific version of Cowboy instead of `master`,
-and properly test your release every time you update Cowboy.
-
-If you type `make` in a shell now, your application should build
-as expected. If you get compilation errors, double check that you
-haven't made any typo when creating the previous files.
-
-``` bash
-$ make
-```
-
-Generating the release
-----------------------
-
-That's not all however, as we want to create a working release.
-For that purpose, we need to create a `relx.config` file. When
-this file exists, `erlang.mk` will automatically download `relx`
-and build the release when you type `make`.
-
-In the `relx.config` file, we only need to tell `relx` that
-we want the release to include the `hello_erlang` application,
-and that we want an extended start script for convenience.
-`relx` will figure out which other applications are required
-by looking into the `.app` files for dependencies.
-
-``` erlang
-{release, {hello_erlang, "1"}, [hello_erlang]}.
-{extended_start_script, true}.
-```
-
-The `release` value is used to specify the release name, its
-version, and the applications to be included.
-
-We can now build and start the release.
-
-``` bash
-$ make
-$ ./_rel/hello_erlang/bin/hello_erlang console
-```
-
-If you then access `http://localhost:8080` using your browser,
-you should receive a nice greet!
diff --git a/guide/hooks.md b/guide/hooks.md
deleted file mode 100644
index b2e0c50..0000000
--- a/guide/hooks.md
+++ /dev/null
@@ -1,85 +0,0 @@
-Hooks
-=====
-
-Cowboy provides two hooks. `onrequest` is called once the request
-line and headers have been received. `onresponse` is called just
-before sending the response.
-
-Onrequest
----------
-
-The `onrequest` hook is called as soon as Cowboy finishes fetching
-the request headers. It occurs before any other processing, including
-routing. It can be used to perform any modification needed on the
-request object before continuing with the processing. If a reply is
-sent inside this hook, then Cowboy will move on to the next request,
-skipping any subsequent handling.
-
-This hook is a function that takes a request object as argument,
-and returns a request object. This function MUST NOT crash. Cowboy
-will not send any reply if a crash occurs in this function.
-
-You can specify the `onrequest` hook when creating the listener,
-inside the request options.
-
-``` erlang
-cowboy:start_http(my_http_listener, 100,
-    [{port, 8080}],
-    [
-        {env, [{dispatch, Dispatch}]},
-        {onrequest, fun ?MODULE:debug_hook/1}
-    ]
-).
-```
-
-The following hook function prints the request object everytime a
-request is received. This can be useful for debugging, for example.
-
-``` erlang
-debug_hook(Req) ->
-    erlang:display(Req),
-    Req.
-```
-
-Make sure to always return the last request object obtained.
-
-Onresponse
-----------
-
-The `onresponse` hook is called right before sending the response
-to the socket. It can be used for the purposes of logging responses,
-or for modifying the response headers or body. The best example is
-providing custom error pages.
-
-Note that like the `onrequest` hook, this function MUST NOT crash.
-Cowboy may or may not send a reply if this function crashes. If a reply
-is sent, the hook MUST explicitly provide all headers that are needed.
-
-You can specify the `onresponse` hook when creating the listener.
-
-``` erlang
-cowboy:start_http(my_http_listener, 100,
-    [{port, 8080}],
-    [
-        {env, [{dispatch, Dispatch}]},
-        {onresponse, fun ?MODULE:custom_404_hook/4}
-    ]
-).
-```
-
-The following hook function will provide a custom body for 404 errors
-when it has not been provided before, and will let Cowboy proceed with
-the default response otherwise.
-
-``` erlang
-custom_404_hook(404, Headers, <<>>, Req) ->
-    Body = <<"404 Not Found.">>,
-    Headers2 = lists:keyreplace(<<"content-length">>, 1, Headers,
-        {<<"content-length">>, integer_to_list(byte_size(Body))}),
-    {ok, Req2} = cowboy_req:reply(404, Headers2, Body, Req),
-    Req2;
-custom_404_hook(_, _, _, Req) ->
-    Req.
-```
-
-Again, make sure to always return the last request object obtained.
diff --git a/guide/http_handlers.md b/guide/http_handlers.md
deleted file mode 100644
index b1e2d5c..0000000
--- a/guide/http_handlers.md
+++ /dev/null
@@ -1,149 +0,0 @@
-Handling plain HTTP requests
-============================
-
-The simplest way to handle a request is by writing a
-plain HTTP handler. It is modeled after Erlang/OTP's
-gen_server behaviour, although simplified, as Cowboy
-will simply call the three callbacks sequentially.
-
-Initialization
---------------
-
-The first callback, `init/3`, is common to all handlers,
-as it is used to identify the type of handler. Plain
-HTTP handlers just return `ok`.
-
-``` erlang
-init(_Type, Req, _Opts) ->
-    {ok, Req, no_state}.
-```
-
-This function receives the name of the transport and
-protocol modules used for processing the request.
-They can be used to quickly dismiss requests. For
-example the following handler will crash when accessed
-using TCP instead of SSL.
-
-``` erlang
-init({ssl, _}, Req, _Opts) ->
-    {ok, Req, no_state}.
-```
-
-This function also receives the options associated with
-this route that you configured previously. If your
-handler does not use options, then it is recommended
-you match the value `[]` directly to quickly detect
-configuration errors.
-
-``` erlang
-init(_Type, Req, []) ->
-    {ok, Req, no_state}.
-```
-
-You do not need to validate the options unless they
-are user configured. If they are, and there's a
-configuration error, you may choose to crash. For
-example, this will crash if the required `lang`
-option is not found.
-
-``` erlang
-init(_Type, Req, Opts) ->
-    {_, _Lang} = lists:keyfind(lang, 1, Opts),
-    {ok, Req, no_state}.
-```
-
-If your users are unlikely to figure out the issue
-without explanations, then you should send a more
-meaningful error back to the user. Since we already
-replied to the user, there's no need for us to
-continue with the handler code, so we use the
-`shutdown` return value to stop early.
-
-``` erlang
-init(_Type, Req, Opts) ->
-    case lists:keyfind(lang, 1, Opts) of
-        false ->
-            {ok, Req2} = cowboy_req:reply(500, [
-                {<<"content-type">>, <<"text/plain">>}
-            ], "Missing option 'lang'.", Req),
-            {shutdown, Req2, no_state};
-        _ ->
-            {ok, Req, no_state}
-    end.
-```
-
-Once the options have been validated, we can use them
-safely. So we need to pass them onward to the rest of
-the handler. That's what the third element of the return
-tuple, the state, is for.
-
-We recommend that you create a state record for this.
-The record will make your handler code clearer and
-will allow you to better use Dialyzer for type checking.
-
-``` erlang
--record(state, {
-    lang :: en | fr
-    %% More fields here.
-}).
-
-init(_Type, Req, Opts) ->
-    {_, Lang} = lists:keyfind(lang, 1, Opts),
-    {ok, Req, #state{lang=Lang}}.
-```
-
-Handling the request
---------------------
-
-The second callback, `handle/2`, is specific to plain HTTP
-handlers. It's where you, wait for it, handle the request.
-
-A handle function that does nothing would look like this:
-
-``` erlang
-handle(Req, State) ->
-    {ok, Req, State}.
-```
-
-There's no other return value. To obtain information about
-the request, or send a response, you would use the Req object
-here. The Req object is documented in its own chapter.
-
-The following handle function will send a fairly original response.
-
-``` erlang
-handle(Req, State) ->
-    {ok, Req2} = cowboy_req:reply(200, [
-        {<<"content-type">>, <<"text/plain">>}
-    ], <<"Hello World!">>, Req),
-    {ok, Req2, State}.
-```
-
-Cleaning up
------------
-
-The third and last callback, `terminate/3`, will most likely
-be empty in your handler.
-
-``` erlang
-terminate(_Reason, Req, State) ->
-    ok.
-```
-
-This callback is strictly reserved for any required cleanup.
-You cannot send a response from this function. There is no
-other return value.
-
-If you used the process dictionary, timers, monitors or may
-be receiving messages, then you can use this function to clean
-them up, as Cowboy might reuse the process for the next
-keep-alive request.
-
-The chances of any of this happening in your handler are pretty
-thin however. The use of the process dictionary is discouraged
-in Erlang code in general. And if you need to use timers, monitors
-or to receive messages, you are better off with a loop handler,
-a different kind of handler meant specifically for this use.
-
-This function is still available should you need it. It will
-always be called.
diff --git a/guide/http_req_life.md b/guide/http_req_life.md
deleted file mode 100644
index 1462b59..0000000
--- a/guide/http_req_life.md
+++ /dev/null
@@ -1,153 +0,0 @@
-The life of a request
-=====================
-
-This chapter explains the different steps a request
-goes through until a response is sent, along with
-details of the Cowboy implementation.
-
-Request/response
-----------------
-
-As you already know, HTTP clients connect to the server and
-send a request for a resource; the server then sends a
-response containing the resource if it could obtain it.
-
-Before the server can send the resource, however, it
-needs to perform many different operations to read the
-request, find the resource, prepare the response being
-sent and often other related operations the user can
-add like writing logs.
-
-Requests take the following route in Cowboy:
-
-![HTTP request/response flowchart](http_req_resp.png)
-
-This shows the default middlewares, but they may be
-configured differently in your setup. The dark green
-indicates the points where you can hook your own code,
-the light green is the Cowboy code that you can of
-course configure as needed.
-
-The `acceptor` is the part of the server that accepts
-the connection and create an Erlang process to handle
-it. The `parser` then starts reading from the socket
-and handling requests as they come until the socket
-is closed.
-
-A response may be sent at many different points in the
-life of the request. If Cowboy can't parse the request,
-it gives up with an error response. If the router can't
-find the resource, it sends a not found error. Your
-own code can of course send a response at any time.
-
-When a response is sent, you can optionally modify it
-or act upon it by enabling the `onresponse` hook. By
-default the response is sent directly to the client.
-
-And then?
----------
-
-Behavior depends on what protocol is in use.
-
-HTTP/1.0 can only process one request per connection,
-so Cowboy will close the connection immediately after
-it sends the response.
-
-HTTP/1.1 allows the client to request that the server
-keeps the connection alive. This mechanism is described
-in the next section.
-
-SPDY is designed to allow sending multiple requests
-asynchronously on the same connection. Details on what
-this means for your application is described in this
-chapter.
-
-Keep-alive (HTTP/1.1)
----------------------
-
-With HTTP/1.1, the connection may be left open for
-subsequent requests to come. This mechanism is called
-`keep-alive`.
-
-When the client sends a request to the server, it includes
-a header indicating whether it would like to leave the
-socket open. The server may or may not accept, indicating
-its choice by sending the same header in the response.
-
-Cowboy will include this header automatically in all
-responses to HTTP/1.1 requests. You can however force
-the closing of the socket if you want. When Cowboy sees
-you want to send a `connection: close` header, it will
-not override it and will close the connection as soon
-as the reply is sent.
-
-This snippet will force Cowboy to close the connection.
-
-``` erlang
-{ok, Req2} = cowboy_req:reply(200, [
-    {<<"connection">>, <<"close">>},
-], <<"Closing the socket in 3.. 2.. 1..">>, Req).
-```
-
-Cowboy will only accept a certain number of new requests
-on the same connection. By default it will run up to 100
-requests. This number can be changed by setting the
-`max_keepalive` configuration value when starting an
-HTTP listener.
-
-``` erlang
-cowboy:start_http(my_http_listener, 100, [{port, 8080}], [
-        {env, [{dispatch, Dispatch}]},
-        {max_keepalive, 5}
-]).
-```
-
-Cowboy implements the keep-alive mechanism by reusing
-the same process for all requests. This allows Cowboy
-to save memory. This works well because most code will
-not have any side effect impacting subsequent requests.
-But it also means you need to clean up if you do have
-code with side effects. The `terminate/3` function can
-be used for this purpose.
-
-Pipelining (HTTP/1.1)
----------------------
-
-While HTTP is designed as a sequential protocol, with
-the client sending a request and then waiting for the
-response from the server, nothing prevents the client
-from sending more requests to the server without waiting
-for the response, due to how sockets work. The server
-still handles the requests sequentially and sends the
-responses in the same order.
-
-This mechanism is called pipelining. It allows reducing
-latency when a client needs to request many resources
-at the same time. This is used by browsers when requesting
-static files for example.
-
-This is handled automatically by the server.
-
-Asynchronous requests (SPDY)
-----------------------------
-
-In SPDY, the client can send a request at any time.
-And the server can send a response at any time too.
-
-This means for example that the client does not need
-to wait for a request to be fully sent to send another,
-it is possible to interleave a request with the request
-body of another request. The same is true with responses.
-Responses may also be sent in a different order.
-
-Because requests and responses are fully asynchronous,
-Cowboy creates a new process for each request, and these
-processes are managed by another process that handles the
-connection itself.
-
-SPDY servers may also decide to send resources to the
-client before the client requests them. This is especially
-useful for sending static files associated with the HTML
-page requested, as this reduces the latency of the overall
-response. Cowboy does not support this particular mechanism
-at this point, however.
diff --git a/guide/http_req_resp.png b/guide/http_req_resp.png
deleted file mode 100644
index e38935f..0000000
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deleted file mode 100644
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diff --git a/guide/introduction.md b/guide/introduction.md
deleted file mode 100644
index 0af9039..0000000
--- a/guide/introduction.md
+++ /dev/null
@@ -1,53 +0,0 @@
-Introduction
-============
-
-Cowboy is a small, fast and modular HTTP server written in Erlang.
-
-Cowboy aims to provide a complete HTTP stack, including its derivatives
-SPDY, Websocket and REST. Cowboy currently supports HTTP/1.0, HTTP/1.1,
-Websocket (all implemented drafts + standard) and Webmachine-based REST.
-
-Cowboy is a high quality project. It has a small code base, is very
-efficient (both in latency and memory use) and can easily be embedded
-in another application.
-
-Cowboy is clean Erlang code. It includes hundreds of tests and its code
-is fully compliant with the Dialyzer. It is also well documented and
-features both a Function Reference and a User Guide.
-
-Prerequisites
--------------
-
-No Erlang knowledge is required for reading this guide. The reader will
-be introduced to Erlang concepts and redirected to reference material
-whenever necessary.
-
-Knowledge of the HTTP protocol is recommended but not required, as it
-will be detailed throughout the guide.
-
-Supported platforms
--------------------
-
-Cowboy is tested and supported on Linux.
-
-Cowboy has been reported to work on other platforms, but we make no
-guarantee that the experience will be safe and smooth. You are advised
-to perform the necessary testing and security audits prior to deploying
-on other platforms.
-
-Cowboy is developed for Erlang R15B+.
-
-Cowboy may be compiled on earlier Erlang versions with small source code
-modifications but there is no guarantee that it will work as expected.
-
-Conventions
------------
-
-In the HTTP protocol, the method name is case sensitive. All standard
-method names are uppercase.
-
-Header names are case insensitive. Cowboy converts all the request
-header names to lowercase, and expects your application to provide
-lowercase header names in the response.
-
-The same applies to any other case insensitive value.
diff --git a/guide/loop_handlers.md b/guide/loop_handlers.md
deleted file mode 100644
index 8689453..0000000
--- a/guide/loop_handlers.md
+++ /dev/null
@@ -1,148 +0,0 @@
-Loop handlers
-=============
-
-Loop handlers are a special kind of HTTP handlers used when the
-response can not be sent right away. The handler enters instead
-a receive loop waiting for the right message before it can send
-a response.
-
-Loop handlers are used for requests where a response might not
-be immediately available, but where you would like to keep the
-connection open for a while in case the response arrives. The
-most known example of such practice is known as long-polling.
-
-Loop handlers can also be used for requests where a response is
-partially available and you need to stream the response body
-while the connection is open. The most known example of such
-practice is known as server-sent events.
-
-While the same can be accomplished using plain HTTP handlers,
-it is recommended to use loop handlers because they are well-tested
-and allow using built-in features like hibernation and timeouts.
-
-Loop handlers essentially wait for one or more Erlang messages
-and feed these messages to the `info/3` callback. It also features
-the `init/3` and `terminate/3` callbacks which work the same as
-for plain HTTP handlers.
-
-Initialization
---------------
-
-The `init/3` function must return a `loop` tuple to enable
-loop handler behavior. This tuple may optionally contain
-a timeout value and/or the atom `hibernate` to make the
-process enter hibernation until a message is received.
-
-This snippet enables the loop handler.
-
-``` erlang
-init(_Type, Req, _Opts) ->
-    {loop, Req, undefined_state}.
-```
-
-However it is largely recommended that you set a timeout
-value. The next example sets a timeout value of 30s and
-also makes the process hibernate.
-
-``` erlang
-init(_Type, Req, _Opts) ->
-    {loop, Req, undefined_state, 30000, hibernate}.
-```
-
-Receive loop
-------------
-
-Once initialized, Cowboy will wait for messages to arrive
-in the process' mailbox. When a message arrives, Cowboy
-calls the `info/3` function with the message, the Req object
-and the handler's state.
-
-The following snippet sends a reply when it receives a
-`reply` message from another process, or waits for another
-message otherwise.
-
-``` erlang
-info({reply, Body}, Req, State) ->
-    {ok, Req2} = cowboy_req:reply(200, [], Body, Req),
-    {ok, Req2, State};
-info(_Msg, Req, State) ->
-    {loop, Req, State, hibernate}.
-```
-
-Do note that the `reply` tuple here may be any message
-and is simply an example.
-
-This callback may perform any necessary operation including
-sending all or parts of a reply, and will subsequently
-return a tuple indicating if more messages are to be expected.
-
-The callback may also choose to do nothing at all and just
-skip the message received.
-
-If a reply is sent, then the `ok` tuple should be returned.
-This will instruct Cowboy to end the request.
-
-Otherwise a `loop` tuple should be returned.
-
-Streaming loop
---------------
-
-Another common case well suited for loop handlers is
-streaming data received in the form of Erlang messages.
-This can be done by initiating a chunked reply in the
-`init/3` callback and then using `cowboy_req:chunk/2`
-every time a message is received.
-
-The following snippet does exactly that. As you can see
-a chunk is sent every time a `chunk` message is received,
-and the loop is stopped by sending an `eof` message.
-
-``` erlang
-init(_Type, Req, _Opts) ->
-	{ok, Req2} = cowboy_req:chunked_reply(200, [], Req),
-    {loop, Req2, undefined_state}.
-
-info(eof, Req, State) ->
-    {ok, Req, State};
-info({chunk, Chunk}, Req, State) ->
-    ok = cowboy_req:chunk(Chunk, Req),
-    {loop, Req, State};
-info(_Msg, Req, State) ->
-    {loop, Req, State}.
-```
-
-Cleaning up
------------
-
-It is recommended that you set the connection header to
-`close` when replying, as this process may be reused for
-a subsequent request.
-
-Please refer to the [HTTP handlers chapter](http_handlers.md)
-for general instructions about cleaning up.
-
-Timeout
--------
-
-By default Cowboy will not attempt to close the connection
-if there is no activity from the client. This is not always
-desirable, which is why you can set a timeout. Cowboy will
-close the connection if no data was received from the client
-after the configured time. The timeout only needs to be set
-once and can't be modified afterwards.
-
-Because the request may have had a body, or may be followed
-by another request, Cowboy is forced to buffer all data it
-receives. This data may grow to become too large though,
-so there is a configurable limit for it. The default buffer
-size is of 5000 bytes, but it may be changed by setting the
-`loop_max_buffer` middleware environment value.
-
-Hibernate
----------
-
-To save memory, you may hibernate the process in between
-messages received. This is done by returning the atom
-`hibernate` as part of the `loop` tuple callbacks normally
-return. Just add the atom at the end and Cowboy will hibernate
-accordingly.
diff --git a/guide/middlewares.md b/guide/middlewares.md
deleted file mode 100644
index 341a0e2..0000000
--- a/guide/middlewares.md
+++ /dev/null
@@ -1,72 +0,0 @@
-Middlewares
-===========
-
-Cowboy delegates the request processing to middleware components.
-By default, two middlewares are defined, for the routing and handling
-of the request, as is detailed in most of this guide.
-
-Middlewares give you complete control over how requests are to be
-processed. You can add your own middlewares to the mix or completely
-change the chain of middlewares as needed.
-
-Cowboy will execute all middlewares in the given order, unless one
-of them decides to stop processing.
-
-Usage
------
-
-Middlewares only need to implement a single callback: `execute/2`.
-It is defined in the `cowboy_middleware` behavior.
-
-This callback has two arguments. The first is the `Req` object.
-The second is the environment.
-
-Middlewares can return one of four different values:
- *  `{ok, Req, Env}` to continue the request processing
- *  `{suspend, Module, Function, Args}` to hibernate
- *  `{halt, Req}` to stop processing and move on to the next request
- *  `{error, StatusCode, Req}` to reply an error and close the socket
-
-Of note is that when hibernating, processing will resume on the given
-MFA, discarding all previous stacktrace. Make sure you keep the `Req`
-and `Env` in the arguments of this MFA for later use.
-
-If an error happens during middleware processing, Cowboy will not try
-to send an error back to the socket, the process will just crash. It
-is up to the middleware to make sure that a reply is sent if something
-goes wrong.
-
-Configuration
--------------
-
-The middleware environment is defined as the `env` protocol option.
-In the previous chapters we saw it briefly when we needed to pass
-the routing information. It is a list of tuples with the first
-element being an atom and the second any Erlang term.
-
-Two values in the environment are reserved:
- *  `listener` contains the name of the listener
- *  `result` contains the result of the processing
-
-The `listener` value is always defined. The `result` value can be
-set by any middleware. If set to anything other than `ok`, Cowboy
-will not process any subsequent requests on this connection.
-
-The middlewares that come with Cowboy may define or require other
-environment values to perform.
-
-You can update the environment by calling the `cowboy:set_env/3`
-convenience function, adding or replacing a value in the environment.
-
-Routing middleware
-------------------
-
-The routing middleware requires the `dispatch` value. If routing
-succeeds, it will put the handler name and options in the `handler`
-and `handler_opts` values of the environment, respectively.
-
-Handler middleware
-------------------
-
-The handler middleware requires the `handler` and `handler_opts`
-values. It puts the result of the request handling into `result`.
diff --git a/guide/modern_web.md b/guide/modern_web.md
deleted file mode 100644
index 53670a4..0000000
--- a/guide/modern_web.md
+++ /dev/null
@@ -1,226 +0,0 @@
-The modern Web
-==============
-
-Let's take a look at various technologies from the beginnings
-of the Web up to this day, and get a preview of what's
-coming next.
-
-Cowboy is compatible with all the technology cited in this
-chapter except of course HTTP/2.0 which has no implementation
-in the wild at the time of writing.
-
-The prehistoric Web
--------------------
-
-HTTP was initially created to serve HTML pages and only
-had the GET method for retrieving them. This initial
-version is documented and is sometimes called HTTP/0.9.
-HTTP/1.0 defined the GET, HEAD and POST methods, and
-was able to send data with POST requests.
-
-HTTP/1.0 works in a very simple way. A TCP connection
-is first established to the server. Then a request is
-sent. Then the server sends a response back and closes
-the connection.
-
-Suffice to say, HTTP/1.0 is not very efficient. Opening
-a TCP connection takes some time, and pages containing
-many assets load much slower than they could because of
-this.
-
-Most improvements done in recent years focused on reducing
-this load time and reducing the latency of the requests.
-
-HTTP/1.1
---------
-
-HTTP/1.1 quickly followed and added a keep-alive mechanism
-to allow using the same connection for many requests, as
-well as streaming capabilities, allowing an endpoint to send
-a body in well defined chunks.
-
-HTTP/1.1 defines the OPTIONS, GET, HEAD, POST, PUT, DELETE,
-TRACE and CONNECT methods. The PATCH method was added in more
-recent years. It also improves the caching capabilities with
-the introduction of many headers.
-
-HTTP/1.1 still works like HTTP/1.0 does, except the connection
-can be kept alive for subsequent requests. This however allows
-clients to perform what is called as pipelining: sending many
-requests in a row, and then processing the responses which will
-be received in the same order as the requests.
-
-REST
-----
-
-The design of HTTP/1.1 was influenced by the REST architectural
-style. REST, or REpresentational State Transfer, is a style of
-architecture for loosely connected distributed systems.
-
-REST defines constraints that systems must obey to in order to
-be RESTful. A system which doesn't follow all the constraints
-cannot be considered RESTful.
-
-REST is a client-server architecture with a clean separation
-of concerns between the client and the server. They communicate
-by referencing resources. Resources can be identified, but
-also manipulated. A resource representation has a media type
-and information about whether it can be cached and how. Hypermedia
-determines how resources are related and how they can be used.
-REST is also stateless. All requests contain the complete
-information necessary to perform the action.
-
-HTTP/1.1 defines all the methods, headers and semantics required
-to implement RESTful systems.
-
-REST is most often used when designing web application APIs
-which are generally meant to be used by executable code directly.
-
-XmlHttpRequest
---------------
-
-Also know as AJAX, this technology allows Javascript code running
-on a web page to perform asynchronous requests to the server.
-This is what started the move from static websites to dynamic
-web applications.
-
-XmlHttpRequest still performs HTTP requests under the hood,
-and then waits for a response, but the Javascript code can
-continue to run until the response arrives. It will then receive
-the response through a callback previously defined.
-
-This is of course still requests initiated by the client,
-the server still had no way of pushing data to the client
-on its own, so new technology appeared to allow that.
-
-Long-polling
-------------
-
-Polling was a technique used to overcome the fact that the server
-cannot push data directly to the client. Therefore the client had
-to repeatedly create a connection, make a request, get a response,
-then try again a few seconds later. This is overly expensive and
-adds an additional delay before the client receives the data.
-
-Polling was necessary to implement message queues and other
-similar mechanisms, where a user must be informed of something
-when it happens, rather than when he refreshes the page next.
-A typical example would be a chat application.
-
-Long-polling was created to reduce the server load by creating
-less connections, but also to improve latency by getting the
-response back to the client as soon as it becomes available
-on the server.
-
-Long-polling works in a similar manner to polling, except the
-request will not get a response immediately. Instead the server
-leaves it open until it has a response to send. After getting
-the response, the client creates a new request and gets back
-to waiting.
-
-You probably guessed by now that long-polling is a hack, and
-like most hacks it can suffer from unforeseen issues, in this
-case it doesn't always play well with proxies.
-
-HTML5
------
-
-HTML5 is, of course, the HTML version after HTML4. But HTML5
-emerged to solve a specific problem: dynamic web applications.
-
-HTML was initially created to write web pages which compose
-a website. But soon people and companies wanted to use HTML
-to write more and more complex websites, eventually known as
-web applications. They are for example your news reader, your
-email client in the browser, or your video streaming website.
-
-Because HTML wasn't enough, they started using proprietary
-solutions, often implemented using plug-ins. This wasn't
-perfect of course, but worked well enough for most people.
-
-However, the needs for a standard solution eventually became
-apparent. The browser needed to be able to play media natively.
-It needed to be able to draw anything. It needed an efficient
-way of streaming events to the server, but also receiving
-events from the server.
-
-The solution went on to become HTML5. At the time of writing
-it is being standardized.
-
-EventSource
------------
-
-EventSource, sometimes also called Server-Sent Events, is a
-technology allowing servers to push data to HTML5 applications.
-
-EventSource is one-way communication channel from the server
-to the client. The client has no means to talk to the server
-other than by using HTTP requests.
-
-It consists of a Javascript object allowing setting up an
-EventSource connection to the server, and a very small protocol
-for sending events to the client on top of the HTTP/1.1
-connection.
-
-EventSource is a lightweight solution that only works for
-UTF-8 encoded text data. Binary data and text data encoded
-differently are not allowed by the protocol. A heavier but
-more generic approach can be found in Websocket.
-
-Websocket
----------
-
-Websocket is a protocol built on top of HTTP/1.1 that provides
-a two-ways communication channel between the client and the
-server. Communication is asynchronous and can occur concurrently.
-
-It consists of a Javascript object allowing setting up a
-Websocket connection to the server, and a binary based
-protocol for sending data to the server or the client.
-
-Websocket connections can transfer either UTF-8 encoded text
-data or binary data. The protocol also includes support for
-implementing a ping/pong mechanism, allowing the server and
-the client to have more confidence that the connection is still
-alive.
-
-A Websocket connection can be used to transfer any kind of data,
-small or big, text or binary. Because of this Websocket is
-sometimes used for communication between systems.
-
-SPDY
-----
-
-SPDY is an attempt to reduce page loading time by opening a
-single connection per server, keeping it open for subsequent
-requests, and also by compressing the HTTP headers to reduce
-the size of requests.
-
-SPDY is compatible with HTTP/1.1 semantics, and is actually
-just a different way of performing HTTP requests and responses,
-by using binary frames instead of a text-based protocol.
-SPDY also allows the server to send extra responses following
-a request. This is meant to allow sending the resources
-associated with the request before the client requests them,
-saving latency when loading websites.
-
-SPDY is an experiment that has proven successful and is used
-as the basis for the HTTP/2.0 standard.
-
-Browsers make use of TLS Next Protocol Negotiation to upgrade
-to a SPDY connection seamlessly if the protocol supports it.
-
-The protocol itself has a few shortcomings which are being
-fixed in HTTP/2.0.
-
-HTTP/2.0
---------
-
-HTTP/2.0 is the long-awaited update to the HTTP/1.1 protocol.
-It is based on SPDY although a lot has been improved at the
-time of writing.
-
-HTTP/2.0 is an asynchronous two-ways communication channel
-between two endpoints.
-
-It is planned to be ready late 2014.
diff --git a/guide/multipart_intro.md b/guide/multipart_intro.md
deleted file mode 100644
index dde4099..0000000
--- a/guide/multipart_intro.md
+++ /dev/null
@@ -1,53 +0,0 @@
-Introduction to multipart
-=========================
-
-Multipart originates from MIME, an Internet standard that
-extends the format of emails. Multipart messages are a
-container for parts of any content-type.
-
-For example, a multipart message may have a part
-containing text and a second part containing an
-image. This is what allows you to attach files
-to emails.
-
-In the context of HTTP, multipart is most often used
-with the `multipart/form-data` content-type. This is
-the content-type you have to use when you want browsers
-to be allowed to upload files through HTML forms.
-
-Multipart is of course not required for uploading
-files, it is only required when you want to do so
-through HTML forms.
-
-Structure
----------
-
-A multipart message is a list of parts. Parts may
-contain either a multipart message or a non-multipart
-content-type. This allows parts to be arranged in a
-tree structure, although this is a rare case as far
-as the Web is concerned.
-
-Form-data
----------
-
-In the normal case, when a form is submitted, the
-browser will use the `application/x-www-form-urlencoded`
-content-type. This type is just a list of keys and
-values and is therefore not fit for uploading files.
-
-That's where the `multipart/form-data` content-type
-comes in. When the form is configured to use this
-content-type, the browser will use one part of the
-message for each form field. This means that a file
-input field will be sent in its own part, but the
-same applies to all other kinds of fields.
-
-A form with a text input, a file input and a select
-choice box will result in a multipart message with
-three parts, one for each field.
-
-The browser does its best to determine the content-type
-of the files it sends this way, but you should not
-rely on it for determining the contents of the file.
-Proper investigation of the contents is recommended.
diff --git a/guide/multipart_req.md b/guide/multipart_req.md
deleted file mode 100644
index a56c70e..0000000
--- a/guide/multipart_req.md
+++ /dev/null
@@ -1,119 +0,0 @@
-Multipart requests
-==================
-
-You can read and parse multipart messages using the
-Req object directly.
-
-Cowboy defines two functions that allows you to get
-information about each part and read their contents.
-
-Checking the content-type
--------------------------
-
-While there is a variety of multipart messages, the
-most common on the Web is `multipart/form-data`. It's
-the type of message being sent when an HTML form
-allows uploading files.
-
-You can quickly figure out if a multipart message
-has been sent by parsing the `content-type` header.
-
-``` erlang
-{ok, {<<"multipart">>, <<"form-data">>, _}, Req2}
-    = cowboy_req:parse_header(<<"content-type">>, Req).
-```
-
-Reading a multipart message
----------------------------
-
-To read a message you have to iterate over all its
-parts. Then, for each part, you can inspect its headers
-and read its body.
-
-``` erlang
-multipart(Req) ->
-    case cowboy_req:part(Req) of
-        {ok, _Headers, Req2} ->
-            {ok, _Body, Req3} = cowboy_req:part_body(Req2),
-            multipart(Req3);
-        {done, Req2} ->
-            Req2
-    end.
-```
-
-Parts do not have a size limit. When a part body is
-too big, Cowboy will return what it read so far and
-allow you to continue if you wish to do so.
-
-The function `cow_multipart:form_data/1` can be used
-to quickly obtain information about a part from a
-`multipart/form-data` message. This function will
-tell you if the part is for a normal field or if it
-is a file being uploaded.
-
-This can be used for example to allow large part bodies
-for files but crash when a normal field is too large.
-
-``` erlang
-multipart(Req) ->
-    case cowboy_req:part(Req) of
-        {ok, Headers, Req2} ->
-            Req4 = case cow_multipart:form_data(Headers) of
-                {data, _FieldName} ->
-                    {ok, _Body, Req3} = cowboy_req:part_body(Req2),
-                    Req3;
-                {file, _FieldName, _Filename, _CType, _CTransferEncoding} ->
-                    stream_file(Req2)
-            end,
-            multipart(Req4);
-        {done, Req2} ->
-            Req2
-    end.
-
-stream_file(Req) ->
-    case cowboy_req:part_body(Req) of
-        {ok, _Body, Req2} ->
-            Req2;
-        {more, _Body, Req2} ->
-            stream_file(Req2)
-    end.
-```
-
-By default the body chunk Cowboy will return is limited
-to 8MB. This can of course be overriden. Both functions
-can take a second argument, the same list of options that
-will be passed to `cowboy_req:body/2` function.
-
-Skipping unwanted parts
------------------------
-
-If you do not want to read a part's body, you can skip it.
-Skipping is easy. If you do not call the function to read
-the part's body, Cowboy will automatically skip it when
-you request the next part.
-
-The following snippet reads all part headers and skips
-all bodies:
-
-``` erlang
-multipart(Req) ->
-    case cowboy_req:part(Req) of
-        {ok, _Headers, Req2} ->
-            multipart(Req2);
-        {done, Req2} ->
-            Req2
-    end.
-```
-
-Similarly, if you start reading the body and it ends up
-being too big, you can simply continue with the next part,
-Cowboy will automatically skip what remains.
-
-Note that the skipping rate may not be adequate for your
-application. If you observe poor performance when skipping,
-you might want to consider manually skipping by calling
-the `cowboy_req:part_body/1` function directly.
-
-And if you started reading the message but decide that you
-do not need the remaining parts, you can simply stop reading
-entirely and Cowboy will automatically figure out what to do.
diff --git a/guide/req.md b/guide/req.md
deleted file mode 100644
index 074f325..0000000
--- a/guide/req.md
+++ /dev/null
@@ -1,312 +0,0 @@
-The Req object
-==============
-
-The Req object is this variable that you will use to obtain
-information about a request, read the body of the request
-and send a response.
-
-A special variable
-------------------
-
-While we call it an "object", it is not an object in the
-OOP sense of the term. In fact it is completely opaque
-to you and the only way you can perform operations using
-it is by calling the functions from the `cowboy_req`
-module.
-
-Almost all the calls to the `cowboy_req` module will
-return an updated request object. Just like you would
-keep the updated `State` variable in a gen_server,
-you MUST keep the updated `Req` variable in a Cowboy
-handler. Cowboy will use this object to know whether
-a response has been sent when the handler has finished
-executing.
-
-The Req object allows accessing both immutable and
-mutable state. This means that calling some of the
-functions twice will not produce the same result.
-For example, when streaming the request body, the
-function will return the body by chunks, one at a
-time, until there is none left.
-
-It also caches the result of operations performed
-on the immutable state. That means that some calls
-will give a result much faster when called many times.
-
-Overview of the cowboy_req interface
-------------------------------------
-
-The `cowboy_req` interface is divided in four groups
-of functions, each having a well defined return type
-signature common to the entire group.
-
-The first group, access functions, will always return
-`{Value, Req}`. The group includes all the following
-functions: `binding/{2,3}`, `bindings/1`, `body_length/1`,
-`cookie/{2,3}`, `cookies/1`, `header/{2,3}`, `headers/1`,
-`host/1`, `host_info/1`, `host_url/1`, `meta/{2,3}`,
-`method/1`, `path/1`, `path_info/1`, `peer/1`, `port/1`,
-`qs/1`, `qs_val/{2,3}`, `qs_vals/1`, `url/1`, `version/1`.
-
-The second group, question functions, will always return
-a `boolean()`. The group includes the following three
-functions: `has_body/1`, `has_resp_body/1`, `has_resp_header/2`.
-
-The third group contains the functions that manipulate
-the socket or perform operations that may legitimately fail.
-They may return `{Result, Req}`, `{Result, Value, Req}`
-or `{error, atom()}`. This includes the following functions:
-`body/{1,2}`, `body_qs/{1,2}`, `chunked_reply/{2,3}`,
-`parse_header/{2,3}`, `part/{1,2}`, `part_body/{1,2}`
-and `reply/{2,3,4}`. Finally, the group also includes the
-`chunk/2` and `continue/1` functions which always return `ok`.
-
-The final group modifies the Req object state without
-performing any immediate operations. As these functions
-can't fail, they always return a new `Req` directly.
-This includes the following functions: `compact/1`,
-`delete_resp_header/2`, `set_meta/3`, `set_resp_body/2`,
-`set_resp_body_fun/{2,3}`, `set_resp_cookie/4`, `set_resp_header/3`.
-
-This chapter covers most of the first group, plus a few other
-functions. The next few chapters cover cookies handling, reading
-the request body and sending a response.
-
-Request
--------
-
-When a client performs a request, it first sends a few required
-values. They are sent differently depending on the protocol
-being used, but the intent is the same. They indicate to the
-server the type of action it wants to do and how to locate
-the resource to perform it on.
-
-The method identifies the action. Standard methods include
-GET, HEAD, OPTIONS, PATCH, POST, PUT, DELETE. Method names
-are case sensitive.
-
-``` erlang
-{Method, Req2} = cowboy_req:method(Req).
-```
-
-The host, port and path parts of the URL identify the resource
-being accessed. The host and port information may not be
-available if the client uses HTTP/1.0.
-
-``` erlang
-{Host, Req2} = cowboy_req:host(Req),
-{Port, Req3} = cowboy_req:port(Req2),
-{Path, Req4} = cowboy_req:path(Req3).
-```
-
-The version used by the client can of course also be obtained.
-
-``` erlang
-{Version, Req2} = cowboy_req:version(Req).
-```
-
-Do note however that clients claiming to implement one version
-of the protocol does not mean they implement it fully, or even
-properly.
-
-Bindings
---------
-
-After routing the request, bindings are available. Bindings
-are these parts of the host or path that you chose to extract
-when defining the routes of your application.
-
-You can fetch a single binding. The value will be `undefined`
-if the binding doesn't exist.
-
-``` erlang
-{Binding, Req2} = cowboy_req:binding(my_binding, Req).
-```
-
-If you need a different value when the binding doesn't exist,
-you can change the default.
-
-``` erlang
-{Binding, Req2} = cowboy_req:binding(my_binding, Req, 42).
-```
-
-You can also obtain all bindings in one call. They will be
-returned as a list of key/value tuples.
-
-``` erlang
-{AllBindings, Req2} = cowboy_req:bindings(Req).
-```
-
-If you used `...` at the beginning of the route's pattern
-for the host, you can retrieve the matched part of the host.
-The value will be `undefined` otherwise.
-
-``` erlang
-{HostInfo, Req2} = cowboy_req:host_info(Req).
-```
-
-Similarly, if you used `...` at the end of the route's
-pattern for the path, you can retrieve the matched part,
-or get `undefined` otherwise.
-
-``` erlang
-{PathInfo, Req2} = cowboy_req:path_info(Req).
-```
-
-Query string
-------------
-
-The query string can be obtained directly.
-
-``` erlang
-{Qs, Req2} = cowboy_req:qs(Req).
-```
-
-You can also requests only one value.
-
-``` erlang
-{QsVal, Req2} = cowboy_req:qs_val(<<"lang">>, Req).
-```
-
-If that value is optional, you can define a default to simplify
-your task.
-
-``` erlang
-{QsVal, Req2} = cowboy_req:qs_val(<<"lang">>, Req, <<"en">>).
-```
-
-Finally, you can obtain all query string values.
-
-``` erlang
-{AllValues, Req2} = cowboy_req:qs_vals(Req).
-```
-
-Request URL
------------
-
-You can reconstruct the full URL of the resource.
-
-``` erlang
-{URL, Req2} = cowboy_req:url(Req).
-```
-
-You can also obtain only the base of the URL, excluding the
-path and query string.
-
-``` erlang
-{BaseURL, Req2} = cowboy_req:host_url(Req).
-```
-
-Headers
--------
-
-Cowboy allows you to obtain the header values as string,
-or parsed into a more meaningful representation.
-
-This will get the string value of a header.
-
-``` erlang
-{HeaderVal, Req2} = cowboy_req:header(<<"content-type">>, Req).
-```
-
-You can of course set a default in case the header is missing.
-
-``` erlang
-{HeaderVal, Req2}
-    = cowboy_req:header(<<"content-type">>, Req, <<"text/plain">>).
-```
-
-And also obtain all headers.
-
-``` erlang
-{AllHeaders, Req2} = cowboy_req:headers(Req).
-```
-
-To parse the previous header, simply call `parse_header/{2,3}`
-where you would call `header/{2,3}` otherwise. Note that the
-return value changes and includes the result of the operation
-as the first element of the returned tuple. A successful parse
-returns `ok`.
-
-``` erlang
-{ok, ParsedVal, Req2} = cowboy_req:parse_header(<<"content-type">>, Req).
-```
-
-When Cowboy doesn't know how to parse the given header, the
-result of the operation will be `undefined` and the string value
-will be returned instead.
-
-``` erlang
-{undefined, HeaderVal, Req2}
-    = cowboy_req:parse_header(<<"unicorn-header">>, Req).
-```
-
-When parsing fails, `{error, Reason}` is returned instead.
-
-You can of course define a default value. Note that the default
-value you specify here is the parsed value you'd like to get
-by default.
-
-``` erlang
-{ok, ParsedVal, Req2}
-    = cowboy_req:parse_header(<<"content-type">>, Req,
-    {<<"text">>, <<"plain">>, []}).
-```
-
-The list of known headers and default values is defined in the
-manual. Also note that the result of parsing is cached, so
-calling this function multiple times for the same values will
-not have a significant performance impact.
-
-Meta
-----
-
-Cowboy will sometimes associate some meta information with
-the request. Built-in meta values are listed in the manual
-for their respective modules.
-
-This will get a meta value. The returned value will be `undefined`
-if it isn't defined.
-
-``` erlang
-{MetaVal, Req2} = cowboy_req:meta(websocket_version, Req).
-```
-
-You can change the default value if needed.
-
-``` erlang
-{MetaVal, Req2} = cowboy_req:meta(websocket_version, Req, 13).
-```
-
-You can also define your own meta values. The name must be
-an `atom()`.
-
-``` erlang
-Req2 = cowboy_req:set_meta(the_answer, 42, Req).
-```
-
-Peer
-----
-
-You can obtain the peer address and port number. This is
-not necessarily the actual IP and port of the client, but
-rather the one of the machine that connected to the server.
-
-``` erlang
-{{IP, Port}, Req2} = cowboy_req:peer(Req).
-```
-
-Reducing the memory footprint
------------------------------
-
-When you are done reading information from the request object
-and know you are not going to access it anymore, for example
-when using long-polling or Websocket, you can use the `compact/1`
-function to remove most of the data from the request object and
-free memory.
-
-``` erlang
-Req2 = cowboy_req:compact(Req).
-```
-
-You will still be able to send a reply if needed.
diff --git a/guide/req_body.md b/guide/req_body.md
deleted file mode 100644
index 5e07fbe..0000000
--- a/guide/req_body.md
+++ /dev/null
@@ -1,166 +0,0 @@
-Reading the request body
-========================
-
-The Req object also allows you to read the request body.
-
-Because the request body can be of any size, all body
-reading operations will only work once, as Cowboy will
-not cache the result of these operations.
-
-Cowboy will not attempt to read the body until you do.
-If handler execution ends without reading it, Cowboy
-will simply skip it.
-
-Cowboy provides different ways to read the request body.
-You can read it directly, stream it, but also read and
-parse in a single call for form urlencoded formats or
-multipart. All of these except multipart are covered in
-this chapter. Multipart is covered later on in the guide.
-
-Check for request body
-----------------------
-
-You can check whether a body was sent with the request.
-
-``` erlang
-cowboy_req:has_body(Req).
-```
-
-It will return `true` if there is a request body, and
-`false` otherwise.
-
-Note that it is generally safe to assume that a body is
-sent for `POST`, `PUT` and `PATCH` requests, without
-having to explicitly check for it.
-
-Request body length
--------------------
-
-You can obtain the body length if it was sent with the
-request.
-
-``` erlang
-{Length, Req2} = cowboy_req:body_length(Req).
-```
-
-The value returned will be `undefined` if the length
-couldn't be figured out from the request headers. If
-there's a body but no length is given, this means that
-the chunked transfer-encoding was used. You can read
-chunked bodies by using the stream functions.
-
-Reading the body
-----------------
-
-You can read the whole body directly in one call.
-
-``` erlang
-{ok, Body, Req2} = cowboy_req:body(Req).
-```
-
-By default, Cowboy will attempt to read up to a
-size of 8MB. You can override this limit as needed.
-
-``` erlang
-{ok, Body, Req2} = cowboy_req:body(Req, [{length, 100000000}]).
-```
-
-You can also disable it.
-
-``` erlang
-{ok, Body, Req2} = cowboy_req:body(Req, [{length, infinity}]).
-```
-
-It is recommended that you do not disable it for public
-facing websites.
-
-If the body is larger than the limit, then Cowboy will return
-a `more` tuple instead, allowing you to stream it if you
-would like to.
-
-Streaming the body
-------------------
-
-You can stream the request body by chunks.
-
-Cowboy returns a `more` tuple when there is more body to
-be read, and an `ok` tuple for the last chunk. This allows
-you to loop over all chunks.
-
-``` erlang
-body_to_console(Req) ->
-    case cowboy_req:body(Req) of
-        {ok, Data, Req2} ->
-            io:format("~s", [Data]),
-            Req2;
-        {more, Data, Req2} ->
-            io:format("~s", [Data]),
-            body_to_console(Req2)
-    end.
-```
-
-You can of course set the `length` option to configure the
-size of chunks.
-
-Rate of data transmission
--------------------------
-
-You can control the rate of data transmission by setting
-options when calling body functions. This applies not only
-to the functions described in this chapter, but also to
-the multipart functions.
-
-The `read_length` option defines the maximum amount of data
-to be received from the socket at once, in bytes.
-
-The `read_timeout` option defines the time Cowboy waits
-before that amount is received, in milliseconds.
-
-Transfer and content decoding
------------------------------
-
-Cowboy will by default decode the chunked transfer-encoding
-if any. It will not decode any content-encoding by default.
-
-The first time you call a body function you can set the
-`transfer_decode` and `content_decode` options. If the body
-was already started being read these options are simply
-ignored.
-
-The following example shows how to set both options.
-
-``` erlang
-{ok, Req2} = cowboy_req:body(Req, [
-    {transfer_decode, fun transfer_decode/2, TransferState},
-    {content_decode, fun content_decode/1}
-]).
-```
-
-Reading a form urlencoded body
-------------------------------
-
-You can directly obtain a list of key/value pairs if the
-body was sent using the application/x-www-form-urlencoded
-content-type.
-
-``` erlang
-{ok, KeyValues, Req2} = cowboy_req:body_qs(Req).
-```
-
-You can then retrieve an individual value from that list.
-
-``` erlang
-{_, Lang} = lists:keyfind(lang, 1, KeyValues).
-```
-
-You should not attempt to match on the list as the order
-of the values is undefined.
-
-By default Cowboy will reject bodies with a size above
-64KB when using this function. You can override this limit
-by setting the `length` option.
-
-``` erlang
-{ok, KeyValues, Req2} = cowboy_req:body_qs(Req,
-    [{length, 2000000}]).
-```
diff --git a/guide/resource_design.md b/guide/resource_design.md
deleted file mode 100644
index 744e4ee..0000000
--- a/guide/resource_design.md
+++ /dev/null
@@ -1,233 +0,0 @@
-Designing a resource handler
-============================
-
-This chapter aims to provide you with a list of questions
-you must answer in order to write a good resource handler.
-It is meant to be usable as a step by step guide.
-
-The service
------------
-
-Can the service become unavailable, and when it does, can
-we detect it? For example database connectivity problems
-may be detected early. We may also have planned outages
-of all or parts of the system. Implement the
-`service_available` callback.
-
-What HTTP methods does the service implement? Do we need
-more than the standard OPTIONS, HEAD, GET, PUT, POST,
-PATCH and DELETE? Are we not using one of those at all?
-Implement the `known_methods` callback.
-
-Type of resource handler
-------------------------
-
-Am I writing a handler for a collection of resources,
-or for a single resource?
-
-The semantics for each of these are quite different.
-You should not mix collection and single resource in
-the same handler.
-
-Collection handler
-------------------
-
-Skip this section if you are not doing a collection.
-
-Is the collection hardcoded or dynamic? For example
-if you use the route `/users` for the collection of
-users then the collection is hardcoded; if you use
-`/forums/:category` for the collection of threads
-then it isn't. When the collection is hardcoded you
-can safely assume the resource always exists.
-
-What methods should I implement?
-
-OPTIONS is used to get some information about the
-collection. It is recommended to allow it even if you
-do not implement it, as Cowboy has a default
-implementation built-in.
-
-HEAD and GET are used to retrieve the collection.
-If you allow GET, also allow HEAD as there's no extra
-work required to make it work.
-
-POST is used to create a new resource inside the
-collection. Creating a resource by using POST on
-the collection is useful when resources may be
-created before knowing their URI, usually because
-parts of it are generated dynamically. A common
-case is some kind of auto incremented integer
-identifier.
-
-The next methods are more rarely allowed.
-
-PUT is used to create a new collection (when
-the collection isn't hardcoded), or replace
-the entire collection.
-
-DELETE is used to delete the entire collection.
-
-PATCH is used to modify the collection using
-instructions given in the request body. A PATCH
-operation is atomic. The PATCH operation may
-be used for such things as reordering; adding,
-modifying or deleting parts of the collection.
-
-Single resource handler
------------------------
-
-Skip this section if you are doing a collection.
-
-What methods should I implement?
-
-OPTIONS is used to get some information about the
-resource. It is recommended to allow it even if you
-do not implement it, as Cowboy has a default
-implementation built-in.
-
-HEAD and GET are used to retrieve the resource.
-If you allow GET, also allow HEAD as there's no extra
-work required to make it work.
-
-POST is used to update the resource.
-
-PUT is used to create a new resource (when it doesn't
-already exist) or replace the resource.
-
-DELETE is used to delete the resource.
-
-PATCH is used to modify the resource using
-instructions given in the request body. A PATCH
-operation is atomic. The PATCH operation may
-be used for adding, removing or modifying specific
-values in the resource.
-
-The resource
-------------
-
-Following the above discussion, implement the
-`allowed_methods` callback.
-
-Does the resource always exist? If it may not, implement
-the `resource_exists` callback.
-
-Do I need to authenticate the client before they can
-access the resource? What authentication mechanisms
-should I provide? This may include form-based, token-based
-(in the URL or a cookie), HTTP basic, HTTP digest,
-SSL certificate or any other form of authentication.
-Implement the `is_authorized` callback.
-
-Do I need fine-grained access control? How do I determine
-that they are authorized access? Handle that in your
-`is_authorized` callback.
-
-Can access to a resource be forbidden regardless of access
-being authorized? A simple example of that is censorship
-of a resource. Implement the `forbidden` callback.
-
-Is there any constraints on the length of the resource URI?
-For example the URI may be used as a key in storage and may
-have a limit in length. Implement `uri_too_long`.
-
-Representations
----------------
-
-What media types do I provide? If text based, what charsets
-are provided? What languages do I provide?
-
-Implement the mandatory `content_types_provided`. Prefix
-the callbacks with `to_` for clarity. For example `to_html`
-or `to_text`.
-
-Implement the `languages_provided` or `charsets_provided`
-callbacks if applicable.
-
-Is there any other header that may make the representation
-of the resource vary? Implement the `variances` callback.
-
-Depending on your choices for caching content, you may
-want to implement one or more of the `generate_etag`,
-`last_modified` and `expires` callbacks.
-
-Do I want the user or user agent to actively choose a
-representation available? Send a list of available
-representations in the response body and implement
-the `multiple_choices` callback.
-
-Redirections
-------------
-
-Do I need to keep track of what resources were deleted?
-For example you may have a mechanism where moving a
-resource leaves a redirect link to its new location.
-Implement the `previously_existed` callback.
-
-Was the resource moved, and is the move temporary? If
-it is explicitly temporary, for example due to maintenance,
-implement the `moved_temporarily` callback. Otherwise,
-implement the `moved_permanently` callback.
-
-The request
------------
-
-Do we need to perform extra checks to make sure the request
-is valid? Cowboy will do many checks when receiving the
-request already, do we need more? Note that this only
-applies to the request-line and headers of the request,
-and not the body. Implement `malformed_request`.
-
-May there be a request body? Will I know its size?
-What's the maximum size of the request body I'm willing
-to accept? Implement `valid_entity_length`.
-
-Finally, take a look at the sections corresponding to the
-methods you are implementing.
-
-OPTIONS method
---------------
-
-Cowboy by default will send back a list of allowed methods.
-Do I need to add more information to the response? Implement
-the `options` method.
-
-GET and HEAD methods
---------------------
-
-If you implement the methods GET and/or HEAD, you must
-implement one `ProvideResource` callback for each
-content-type returned by the `content_types_provided`
-callback.
-
-PUT, POST and PATCH methods
----------------------------
-
-If you implement the methods PUT, POST and/or PATCH,
-you must implement the `content_types_accepted` callback,
-and one `AcceptResource` callback for each content-type
-it returns. Prefix the `AcceptResource` callback names
-with `from_` for clarity. For example `from_html` or
-`from_json`.
-
-Do we want to allow the POST method to create individual
-resources directly through their URI (like PUT)? Implement
-the `allow_missing_post` callback. It is recommended to
-explicitly use PUT in these cases instead.
-
-May there be conflicts when using PUT to create or replace
-a resource? Do we want to make sure that two updates around
-the same time are not cancelling one another? Implement the
-`is_conflict` callback.
-
-DELETE methods
---------------
-
-If you implement the method DELETE, you must implement
-the `delete_resource` callback.
-
-When `delete_resource` returns, is the resource completely
-removed from the server, including from any caching service?
-If not, and/or if the deletion is asynchronous and we have
-no way of knowing it has been completed yet, implement the
-`delete_completed` callback.
diff --git a/guide/resp.md b/guide/resp.md
deleted file mode 100644
index b3da72d..0000000
--- a/guide/resp.md
+++ /dev/null
@@ -1,203 +0,0 @@
-Sending a response
-==================
-
-The Req object also allows you to send a response.
-
-You can only send one response. Any other attempt will
-trigger a crash. The response may be sent in one go or
-with its body streamed by chunks of arbitrary size.
-
-You can also set headers or the response body in advance
-and Cowboy will use them when you finally do reply.
-
-Reply
------
-
-You can send a reply with no particular headers or body.
-Cowboy will make sure to send the mandatory headers with
-the response.
-
-``` erlang
-{ok, Req2} = cowboy_req:reply(200, Req).
-```
-
-You can define headers to be sent with the response. Note
-that header names must be lowercase. Again, Cowboy will
-make sure to send the mandatory headers with the response.
-
-``` erlang
-{ok, Req2} = cowboy_req:reply(303, [
-    {<<"location">>, <<"http://ninenines.eu">>}
-], Req).
-```
-
-You can override headers that Cowboy would send otherwise.
-Any header set by the user will be used over the ones set
-by Cowboy. For example, you can advertise yourself as a
-different server.
-
-``` erlang
-{ok, Req2} = cowboy_req:reply(200, [
-    {<<"server">>, <<"yaws">>}
-], Req).
-```
-
-We also saw earlier how to force close the connection by
-overriding the connection header.
-
-Finally, you can also send a body with the response. Cowboy
-will automatically set the content-length header if you do.
-We recommend that you set the content-type header so the
-client may know how to read the body.
-
-``` erlang
-{ok, Req2} = cowboy_req:reply(200, [
-    {<<"content-type">>, <<"text/plain">>}
-], "Hello world!", Req).
-```
-
-Here is the same example but sending HTML this time.
-
-``` erlang
-{ok, Req2} = cowboy_req:reply(200, [
-    {<<"content-type">>, <<"text/html">>}
-], "<html><head>Hello world!</head><body><p>Hats off!</p></body></html>", Req).
-```
-
-Note that the reply is sent immediately.
-
-Chunked reply
--------------
-
-You can also stream the response body. First, you need to
-initiate the reply by sending the response status code.
-Then you can send the body in chunks of arbitrary size.
-
-``` erlang
-{ok, Req2} = cowboy_req:chunked_reply(200, Req),
-ok = cowboy_req:chunk("Hello...", Req2),
-ok = cowboy_req:chunk("chunked...", Req2),
-ok = cowboy_req:chunk("world!!", Req2).
-```
-
-You should make sure to match on `ok` as an error may be
-returned.
-
-While it is possible to send a chunked response without
-a content-type header, it is still recommended. You can
-set this header or any other just like for normal replies.
-
-``` erlang
-{ok, Req2} = cowboy_req:chunked_reply(200, [
-    {<<"content-type">>, <<"text/html">>}
-], Req),
-ok = cowboy_req:chunk("<html><head>Hello world!</head>", Req2),
-ok = cowboy_req:chunk("<body><p>Hats off!</p></body></html>", Req2).
-```
-
-Note that the reply and each chunk following it are sent
-immediately.
-
-Preset response headers
------------------------
-
-You can define response headers in advance. They will be
-merged into the headers given in the reply call. Headers
-in the reply call override preset response headers which
-override the default Cowboy headers.
-
-``` erlang
-Req2 = cowboy_req:set_resp_header(<<"allow">>, "GET", Req).
-```
-
-You can check if a response header has already been set.
-This will only check the response headers that you set,
-and not the ones Cowboy will add when actually sending
-the reply.
-
-``` erlang
-cowboy_req:has_resp_header(<<"allow">>, Req).
-```
-
-It will return `true` if the header is defined, and `false`
-otherwise.
-
-Finally, you can also delete a preset response header if
-needed. If you do, it will not be sent.
-
-``` erlang
-Req2 = cowboy_req:delete_resp_header(<<"allow">>, Req).
-```
-
-Preset response body
---------------------
-
-You can set the response body in advance. Note that this
-body will be ignored if you then choose to send a chunked
-reply, or if you send a reply with an explicit body.
-
-``` erlang
-Req2 = cowboy_req:set_resp_body("Hello world!", Req).
-```
-
-You can also set a fun that will be called when it is time
-to send the body. There are three different ways of doing
-that.
-
-If you know the length of the body that needs to be sent,
-you should specify it, as it will help clients determine
-the remaining download time and allow them to inform the
-user.
-
-``` erlang
-F = fun (Socket, Transport) ->
-    Transport:send(Socket, "Hello world!")
-end,
-Req2 = cowboy_req:set_resp_body_fun(12, F, Req).
-```
-
-If you do not know the length of the body, you should use
-a chunked response body fun instead.
-
-``` erlang
-F = fun (SendChunk) ->
-    Body = lists:duplicate(random:uniform(1024, $a)),
-    SendChunk(Body)
-end,
-Req2 = cowboy_req:set_resp_body_fun(chunked, F, Req).
-```
-
-Finally, you can also send data on the socket directly,
-without knowing the length in advance. Cowboy may be
-forced to close the connection at the end of the response
-though depending on the protocol capabilities.
-
-``` erlang
-F = fun (Socket, Transport) ->
-    Body = lists:duplicate(random:uniform(1024, $a)),
-    Transport:send(Socket, Body)
-end,
-Req2 = cowboy_req:set_resp_body_fun(F, Req).
-```
-
-Sending files
--------------
-
-You can send files directly from disk without having to
-read them. Cowboy will use the `sendfile` syscall when
-possible, which means that the file is sent to the socket
-directly from the kernel, which is a lot more performant
-than doing it from userland.
-
-Again, it is recommended to set the size of the file if it
-can be known in advance.
-
-``` erlang
-F = fun (Socket, Transport) ->
-    Transport:sendfile(Socket, "priv/styles.css")
-end,
-Req2 = cowboy_req:set_resp_body_fun(FileSize, F, Req).
-```
-
-Please see the Ranch guide for more information about
-sending files.
diff --git a/guide/rest_cond.png b/guide/rest_cond.png
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diff --git a/guide/rest_flowcharts.md b/guide/rest_flowcharts.md
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-REST flowcharts
-===============
-
-This chapter will explain the REST handler state machine through
-a number of different diagrams.
-
-There are four main paths that requests may follow. One for the
-method OPTIONS; one for the methods GET and HEAD; one for the
-methods PUT, POST and PATCH; and one for the method DELETE.
-
-All paths start with the "Start" diagram, and all paths excluding
-the OPTIONS path go through the "Content negotiation" diagram
-and optionally the "Conditional requests" diagram if the resource
-exists.
-
-The red squares refer to another diagram. The light green squares
-indicate a response. Other squares may be either a callback or a
-question answered by Cowboy itself. Green arrows tend to indicate
-the default behavior if the callback is undefined.
-
-Start
------
-
-All requests start from here.
-
-![REST starting flowchart](rest_start.png)
-
-A series of callbacks are called in succession to perform
-a general checkup of the service, the request line and
-request headers.
-
-The request body, if any, is not expected to have been
-received for any of these steps. It is only processed
-at the end of the "PUT, POST and PATCH methods" diagram,
-when all conditions have been met.
-
-The `known_methods` and `allowed_methods` callbacks
-return a list of methods. Cowboy then checks if the request
-method is in the list, and stops otherwise.
-
-The `is_authorized` callback may be used to check that
-access to the resource is authorized. Authentication
-may also be performed as needed. When authorization is
-denied, the return value from the callback must include
-a challenge applicable to the requested resource, which
-will be sent back to the client in the www-authenticate
-header.
-
-This diagram is immediately followed by either the
-"OPTIONS method" diagram when the request method is
-OPTIONS, or the "Content negotiation" diagram otherwise.
-
-OPTIONS method
---------------
-
-This diagram only applies to OPTIONS requests.
-
-![REST OPTIONS method flowchart](rest_options.png)
-
-The `options` callback may be used to add information
-about the resource, such as media types or languages
-provided; allowed methods; any extra information. A
-response body may also be set, although clients should
-not be expected to read it.
-
-If the `options` callback is not defined, Cowboy will
-send a response containing the list of allowed methods
-by default.
-
-Content negotiation
--------------------
-
-This diagram applies to all request methods other than
-OPTIONS. It is executed right after the "Start" diagram
-is completed.
-
-![REST content negotiation flowchart](rest_conneg.png)
-
-The purpose of these steps is to determine an appropriate
-representation to be sent back to the client.
-
-The request may contain any of the accept header; the
-accept-language header; or the accept-charset header.
-When present, Cowboy will parse the headers and then
-call the corresponding callback to obtain the list
-of provided content-type, language or charset for this
-resource. It then automatically select the best match
-based on the request.
-
-If a callback is not defined, Cowboy will select the
-content-type, language or charset that the client
-prefers.
-
-The `content_types_provided` also returns the name of
-a callback for every content-type it accepts. This
-callback will only be called at the end of the
-"GET and HEAD methods" diagram, when all conditions
-have been met.
-
-The selected content-type, language and charset are
-saved as meta values in the Req object. You *should*
-use the appropriate representation if you set a
-response body manually (alongside an error code,
-for example).
-
-This diagram is immediately followed by
-the "GET and HEAD methods" diagram,
-the "PUT, POST and PATCH methods" diagram,
-or the "DELETE method" diagram, depending on the
-method.
-
-GET and HEAD methods
---------------------
-
-This diagram only applies to GET and HEAD requests.
-
-For a description of the `cond` step, please see
-the "Conditional requests" diagram.
-
-![REST GET/HEAD methods flowchart](rest_get_head.png)
-
-When the resource exists, and the conditional steps
-succeed, the resource can be retrieved.
-
-Cowboy prepares the response by first retrieving
-metadata about the representation, then by calling
-the `ProvideResource` callback. This is the callback
-you defined for each content-types you returned from
-`content_types_provided`. This callback returns the body
-that will be sent back to the client, or a fun if the
-body must be streamed.
-
-When the resource does not exist, Cowboy will figure out
-whether the resource existed previously, and if so whether
-it was moved elsewhere in order to redirect the client to
-the new URI.
-
-The `moved_permanently` and `moved_temporarily` callbacks
-must return the new location of the resource if it was in
-fact moved.
-
-PUT, POST and PATCH methods
----------------------------
-
-This diagram only applies to PUT, POST and PATCH requests.
-
-For a description of the `cond` step, please see
-the "Conditional requests" diagram.
-
-![REST PUT/POST/PATCH methods flowchart](rest_put_post_patch.png)
-
-When the resource exists, first the conditional steps
-are executed. When that succeeds, and the method is PUT,
-Cowboy will call the `is_conflict` callback. This function
-can be used to prevent potential race conditions, by locking
-the resource for example.
-
-Then all three methods reach the `content_types_accepted`
-step that we will describe in a few paragraphs.
-
-When the resource does not exist, and the method is PUT,
-Cowboy will check for conflicts and then move on to the
-`content_types_accepted` step. For other methods, Cowboy
-will figure out whether the resource existed previously,
-and if so whether it was moved elsewhere. If the resource
-is truly non-existent, the method is POST and the call
-for `accept_missing_post` returns `true`, then Cowboy will
-move on to the `content_types_accepted` step. Otherwise
-the request processing ends there.
-
-The `moved_permanently` and `moved_temporarily` callbacks
-must return the new location of the resource if it was in
-fact moved.
-
-The `content_types_accepted` returns a list of
-content-types it accepts, but also the name of a callback
-for each of them. Cowboy will select the appropriate
-callback for processing the request body and call it.
-
-This callback may return one of three different return
-values.
-
-If an error occurred while processing the request body,
-it must return `false` and Cowboy will send an
-appropriate error response.
-
-If the method is POST, then you may return `true` with
-an URI of where the resource has been created. This is
-especially useful for writing handlers for collections.
-
-Otherwise, return `true` to indicate success. Cowboy
-will select the appropriate response to be sent depending
-on whether a resource has been created, rather than
-modified, and on the availability of a location header
-or a body in the response.
-
-DELETE method
--------------
-
-This diagram only applies to DELETE requests.
-
-For a description of the `cond` step, please see
-the "Conditional requests" diagram.
-
-![REST DELETE method flowchart](rest_delete.png)
-
-When the resource exists, and the conditional steps
-succeed, the resource can be deleted.
-
-Deleting the resource is a two steps process. First
-the callback `delete_resource` is executed. Use this
-callback to delete the resource.
-
-Because the resource may be cached, you must also
-delete all cached representations of this resource
-in the system. This operation may take a while though,
-so you may return before it finished.
-
-Cowboy will then call the `delete_completed` callback.
-If you know that the resource has been completely
-deleted from your system, including from caches, then
-you can return `true`. If any doubts persist, return
-`false`. Cowboy will assume `true` by default.
-
-To finish, Cowboy checks if you set a response body,
-and depending on that, sends the appropriate response.
-
-When the resource does not exist, Cowboy will figure out
-whether the resource existed previously, and if so whether
-it was moved elsewhere in order to redirect the client to
-the new URI.
-
-The `moved_permanently` and `moved_temporarily` callbacks
-must return the new location of the resource if it was in
-fact moved.
-
-Conditional requests
---------------------
-
-This diagram applies to all request methods other than
-OPTIONS. It is executed right after the `resource_exists`
-callback, when the resource exists.
-
-![REST conditional requests flowchart](rest_cond.png)
-
-A request becomes conditional when it includes either of
-the if-match header; the if-unmodified-since header; the
-if-none-match header; or the if-modified-since header.
-
-If the condition fails, the request ends immediately
-without any retrieval or modification of the resource.
-
-The `generate_etag` and `last_modified` are called as
-needed. Cowboy will only call them once and then cache
-the results for subsequent use.
diff --git a/guide/rest_get_head.png b/guide/rest_get_head.png
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diff --git a/guide/rest_handlers.md b/guide/rest_handlers.md
deleted file mode 100644
index 92b0bc5..0000000
--- a/guide/rest_handlers.md
+++ /dev/null
@@ -1,141 +0,0 @@
-REST handlers
-=============
-
-REST is implemented in Cowboy as a protocol upgrade. Once upgraded,
-the request is handled as a state machine with many optional callbacks
-describing the resource and modifying the machine's behavior.
-
-The REST handler is the recommended way to handle requests.
-
-Initialization
---------------
-
-First, the `init/3` callback is called. This callback is common
-to all handlers. To use REST for the current request, this function
-must return an `upgrade` tuple.
-
-``` erlang
-init({tcp, http}, Req, Opts) ->
-    {upgrade, protocol, cowboy_rest}.
-```
-
-Cowboy will then switch to the REST protocol and start executing
-the state machine, starting from `rest_init/2` if it's defined,
-and ending with `rest_terminate/2` also if defined.
-
-Methods
--------
-
-The REST component has code for handling the following HTTP methods:
-HEAD, GET, POST, PATCH, PUT, DELETE and OPTIONS.
-
-Other methods can be accepted, however they have no specific callback
-defined for them at this time.
-
-Callbacks
----------
-
-All callbacks are optional. Some may become mandatory depending
-on what other defined callbacks return. The various flowcharts
-in the next chapter should be a useful to determine which callbacks
-you need.
-
-When the request starts being processed, Cowboy will call the
-`rest_init/2` function if it is defined, with the Req object
-and the handler options as arguments. This function must return
-`{ok, Req, State}` where `State` is the handler's state that all
-subsequent callbacks will receive.
-
-At the end of every request, the special callback `rest_terminate/2`
-will be called if it is defined. It cannot be used to send a reply,
-and must always return `ok`.
-
-All other callbacks are resource callbacks. They all take two
-arguments, the Req object and the State, and return a three-element
-tuple of the form `{Value, Req, State}`.
-
-The following table summarizes the callbacks and their default values.
-If the callback isn't defined, then the default value will be used.
-Please look at the flowcharts to find out the result of each return
-value.
-
-All callbacks can also return `{halt, Req, State}` to stop execution
-of the request, at which point `rest_terminate/2` will be called.
-
-In the following table, "skip" means the callback is entirely skipped
-if it is undefined, moving directly to the next step. Similarly, an
-empty column means there is no default value for this callback.
-
-| Callback name          | Default value             |
-| ---------------------- | ------------------------- |
-| allowed_methods        | `[<<"GET">>, <<"HEAD">>, <<"OPTIONS">>]` |
-| allow_missing_post     | `true`                    |
-| charsets_provided      | skip                      |
-| content_types_accepted |                           |
-| content_types_provided | `[{{<<"text">>, <<"html">>, '*'}, to_html}] ` |
-| delete_completed       | `true`                    |
-| delete_resource        | `false`                   |
-| expires                | `undefined`               |
-| forbidden              | `false`                   |
-| generate_etag          | `undefined`               |
-| is_authorized          | `true`                    |
-| is_conflict            | `false`                   |
-| known_content_type     | `true`                    |
-| known_methods          | `[<<"GET">>, <<"HEAD">>, <<"POST">>, <<"PUT">>, <<"PATCH">>, <<"DELETE">>, <<"OPTIONS">>]` |
-| languages_provided     | skip                      |
-| last_modified          | `undefined`               |
-| malformed_request      | `false`                   |
-| moved_permanently      | `false`                   |
-| moved_temporarily      | `false`                   |
-| multiple_choices       | `false`                   |
-| options                | `ok`                      |
-| previously_existed     | `false`                   |
-| resource_exists        | `true`                    |
-| service_available      | `true`                    |
-| uri_too_long           | `false`                   |
-| valid_content_headers  | `true`                    |
-| valid_entity_length    | `true`                    |
-| variances              | `[]`                      |
-
-As you can see, Cowboy tries to move on with the request whenever
-possible by using well thought out default values.
-
-In addition to these, there can be any number of user-defined
-callbacks that are specified through `content_types_accepted/2`
-and `content_types_provided/2`. They can take any name, however
-it is recommended to use a separate prefix for the callbacks of
-each function. For example, `from_html` and `to_html` indicate
-in the first case that we're accepting a resource given as HTML,
-and in the second case that we send one as HTML.
-
-Meta data
----------
-
-Cowboy will set informative meta values at various points of the
-execution. You can retrieve them using `cowboy_req:meta/{2,3}`.
-The values are defined in the following table.
-
-| Meta key   | Details                                              |
-| -----------| ---------------------------------------------------- |
-| media_type | The content-type negotiated for the response entity. |
-| language   | The language negotiated for the response entity.     |
-| charset    | The charset negotiated for the response entity.      |
-
-They can be used to send a proper body with the response to a
-request that used a method other than HEAD or GET.
-
-Response headers
-----------------
-
-Cowboy will set response headers automatically over the execution
-of the REST code. They are listed in the following table.
-
-| Header name      | Details                                            |
-| ---------------- | -------------------------------------------------- |
-| content-language | Language used in the response body                 |
-| content-type     | Media type and charset of the response body        |
-| etag             | Etag of the resource                               |
-| expires          | Expiration date of the resource                    |
-| last-modified    | Last modification date for the resource            |
-| location         | Relative or absolute URI to the requested resource |
-| vary             | List of headers that may change the representation of the resource |
diff --git a/guide/rest_options.png b/guide/rest_options.png
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diff --git a/guide/rest_principles.md b/guide/rest_principles.md
deleted file mode 100644
index 922f158..0000000
--- a/guide/rest_principles.md
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@@ -1,165 +0,0 @@
-REST principles
-===============
-
-This chapter will attempt to define the concepts behind REST
-and explain what makes a service RESTful.
-
-REST is often confused with performing a distinct operation
-depending on the HTTP method, while using more than the GET
-and POST methods. That's highly misguided at best.
-
-We will first attempt to define REST and will look at what
-it means in the context of HTTP and the Web.
-For a more in-depth explanation of REST, you can read
-[Roy T. Fielding's dissertation](http://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm)
-as it does a great job explaining where it comes from and
-what it achieves.
-
-REST architecture
------------------
-
-REST is a *client-server* architecture. The client and the server
-both have a different set of concerns. The server stores and/or
-manipulates information and makes it available to the user in
-an efficient manner. The client takes that information and
-displays it to the user and/or uses it to perform subsequent
-requests for information. This separation of concerns allows both
-the client and the server to evolve independently as it only
-requires that the interface stays the same.
-
-REST is *stateless*. That means the communication between the
-client and the server always contains all the information needed
-to perform the request. There is no session state in the server,
-it is kept entirely on the client's side. If access to a resource
-requires authentication, then the client needs to authenticate
-itself with every request.
-
-REST is *cacheable*. The client, the server and any intermediary
-components can all cache resources in order to improve performance.
-
-REST provides a *uniform interface* between components. This
-simplifies the architecture, as all components follow the same
-rules to speak to one another. It also makes it easier to understand
-the interactions between the different components of the system.
-A number of constraints are required to achieve this. They are
-covered in the rest of the chapter.
-
-REST is a *layered system*. Individual components cannot see
-beyond the immediate layer with which they are interacting. This
-means that a client connecting to an intermediate component, like
-a proxy, has no knowledge of what lies beyond. This allows
-components to be independent and thus easily replaceable or
-extendable.
-
-REST optionally provides *code on demand*. Code may be downloaded
-to extend client functionality. This is optional however because
-the client may not be able to download or run this code, and so
-a REST component cannot rely on it being executed.
-
-Resources and resource identifiers
-----------------------------------
-
-A resource is an abstract concept. In a REST system, any information
-that can be named may be a resource. This includes documents, images,
-a collection of resources and any other information. Any information
-that can be the target of an hypertext link can be a resource.
-
-A resource is a conceptual mapping to a set of entities. The set of
-entities evolves over time; a resource doesn't. For example a resource
-can map to "users who have logged in this past month" and another
-to "all users". At some point in time they may map to the same set of
-entities, because all users logged in this past month. But they are
-still different resources. Similarly, if nobody logged in recently,
-then the first resource may map to the empty set. This resource exists
-regardless of the information it maps to.
-
-Resources are identified by uniform resource identifiers, also known
-as URIs. Sometimes internationalized resource identifiers, or IRIs,
-may also be used, but these can be directly translated into a URI.
-
-In practice we will identify two kinds of resources. Individual
-resources map to a set of one element, for example "user Joe".
-Collection of resources map to a set of 0 to N elements,
-for example "all users".
-
-Resource representations
-------------------------
-
-The representation of a resource is a sequence of bytes associated
-with metadata.
-
-The metadata comes as a list of key-value pairs, where the name
-corresponds to a standard that defines the value's structure and
-semantics. With HTTP, the metadata comes in the form of request
-or response headers. The headers' structure and semantics are well
-defined in the HTTP standard. Metadata includes representation
-metadata, resource metadata and control data.
-
-The representation metadata gives information about the
-representation, such as its media type, the date of last
-modification, or even a checksum.
-
-Resource metadata could be link to related resources or
-information about additional representations of the resource.
-
-Control data allows parameterizing the request or response.
-For example, we may only want the representation returned if
-it is more recent than the one we have in cache. Similarly,
-we may want to instruct the client about how it should cache
-the representation. This isn't restricted to caching. We may
-for example want to store a new representation of a resource
-only if it wasn't modified since we first retrieved it.
-
-The data format of a representation is also known as the media
-type. Some media types are intended for direct rendering to the
-user, while others are intended for automated processing. The
-media type is a key component of the REST architecture.
-
-Self-descriptive messages
--------------------------
-
-Messages must be self-descriptive. That means that the data
-format of a representation must always come with its media
-type (and similarly requesting a resource involves choosing
-the media type of the representation returned). If you are
-sending HTML, then you must say it is HTML by sending the
-media type with the representation. In HTTP this is done
-using the content-type header.
-
-The media type is often an IANA registered media type, like
-`text/html` or `image/png`, but does not need to be. Exactly
-two things are important for respecting this constraint: that
-the media type is well specified, and that the sender and
-recipient agree about what the media type refers to.
-
-This means that you can create your own media types, like
-`application/x-mine`, and that as long as you write the
-specifications for it and that both endpoints agree about
-it then the constraint is respected.
-
-Hypermedia as the engine of application state
----------------------------------------------
-
-The last constraint is generally where services that claim
-to be RESTful fail. Interactions with a server must be
-entirely driven by hypermedia. The client does not need
-any prior knowledge of the service in order to use it,
-other than an entry point and of course basic understanding
-of the media type of the representations, at the very least
-enough to find and identify hyperlinks and link relations.
-
-To give a simple example, if your service only works with
-the `application/json` media type then this constraint
-cannot be respected (as there are no concept of links in
-JSON) and thus your service isn't RESTful. This is the case
-for the majority of self-proclaimed REST services.
-
-On the other hand if you create a JSON based media type
-that has a concept of links and link relations, then
-your service might be RESTful.
-
-Respecting this constraint means that the entirety of the
-service becomes self-discoverable, not only the resources
-in it, but also the operations you can perform on it. This
-makes clients very thin as there is no need to implement
-anything specific to the service to operate on it.
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diff --git a/guide/routing.md b/guide/routing.md
deleted file mode 100644
index 9357424..0000000
--- a/guide/routing.md
+++ /dev/null
@@ -1,255 +0,0 @@
-Routing
-=======
-
-Cowboy does nothing by default.
-
-To make Cowboy useful, you need to map URLs to Erlang modules that will
-handle the requests. This is called routing.
-
-When Cowboy receives a request, it tries to match the requested host and
-path to the resources given in the dispatch rules. If it matches, then
-the associated Erlang code will be executed.
-
-Routing rules are given per host. Cowboy will first match on the host,
-and then try to find a matching path.
-
-Routes need to be compiled before they can be used by Cowboy.
-
-Structure
----------
-
-The general structure for the routes is defined as follow.
-
-``` erlang
-Routes = [Host1, Host2, ... HostN].
-```
-
-Each host contains matching rules for the host along with optional
-constraints, and a list of routes for the path component.
-
-``` erlang
-Host1 = {HostMatch, PathsList}.
-Host2 = {HostMatch, Constraints, PathsList}.
-```
-
-The list of routes for the path component is defined similar to the
-list of hosts.
-
-``` erlang
-PathsList = [Path1, Path2, ... PathN].
-```
-
-Finally, each path contains matching rules for the path along with
-optional constraints, and gives us the handler module to be used
-along with options that will be given to it on initialization.
-
-``` erlang
-Path1 = {PathMatch, Handler, Opts}.
-Path2 = {PathMatch, Constraints, Handler, Opts}.
-```
-
-Continue reading to learn more about the match syntax and the optional
-constraints.
-
-Match syntax
-------------
-
-The match syntax is used to associate host names and paths with their
-respective handlers.
-
-The match syntax is the same for host and path with a few subtleties.
-Indeed, the segments separator is different, and the host is matched
-starting from the last segment going to the first. All examples will
-feature both host and path match rules and explain the differences
-when encountered.
-
-Excluding special values that we will explain at the end of this section,
-the simplest match value is a host or a path. It can be given as either
-a `string()` or a `binary()`.
-
-``` erlang
-PathMatch1 = "/".
-PathMatch2 = "/path/to/resource".
-
-HostMatch1 = "cowboy.example.org".
-```
-
-As you can see, all paths defined this way must start with a slash
-character. Note that these two paths are identical as far as routing
-is concerned.
-
-``` erlang
-PathMatch2 = "/path/to/resource".
-PathMatch3 = "/path/to/resource/".
-```
-
-Hosts with and without a trailing dot are equivalent for routing.
-Similarly, hosts with and without a leading dot are also equivalent.
-
-``` erlang
-HostMatch1 = "cowboy.example.org".
-HostMatch2 = "cowboy.example.org.".
-HostMatch3 = ".cowboy.example.org".
-```
-
-It is possible to extract segments of the host and path and to store
-the values in the `Req` object for later use. We call these kind of
-values bindings.
-
-The syntax for bindings is very simple. A segment that begins with
-the `:` character means that what follows until the end of the segment
-is the name of the binding in which the segment value will be stored.
-
-``` erlang
-PathMatch = "/hats/:name/prices".
-HostMatch = ":subdomain.example.org".
-```
-
-If these two end up matching when routing, you will end up with two
-bindings defined, `subdomain` and `name`, each containing the
-segment value where they were defined. For example, the URL
-`http://test.example.org/hats/wild_cowboy_legendary/prices` will
-result in having the value `test` bound to the name `subdomain`
-and the value `wild_cowboy_legendary` bound to the name `name`.
-They can later be retrieved using `cowboy_req:binding/{2,3}`. The
-binding name must be given as an atom.
-
-There is a special binding name you can use to mimic the underscore
-variable in Erlang. Any match against the `_` binding will succeed
-but the data will be discarded. This is especially useful for
-matching against many domain names in one go.
-
-``` erlang
-HostMatch = "ninenines.:_".
-```
-
-Similarly, it is possible to have optional segments. Anything
-between brackets is optional.
-
-``` erlang
-PathMatch = "/hats/[page/:number]".
-HostMatch = "[www.]ninenines.eu".
-```
-
-You can also have imbricated optional segments.
-
-``` erlang
-PathMatch = "/hats/[page/[:number]]".
-```
-
-You can retrieve the rest of the host or path using `[...]`.
-In the case of hosts it will match anything before, in the case
-of paths anything after the previously matched segments. It is
-a special case of optional segments, in that it can have
-zero, one or many segments. You can then find the segments using
-`cowboy_req:host_info/1` and `cowboy_req:path_info/1` respectively.
-They will be represented as a list of segments.
-
-``` erlang
-PathMatch = "/hats/[...]".
-HostMatch = "[...]ninenines.eu".
-```
-
-If a binding appears twice in the routing rules, then the match
-will succeed only if they share the same value. This copies the
-Erlang pattern matching behavior.
-
-``` erlang
-PathMatch = "/hats/:name/:name".
-```
-
-This is also true when an optional segment is present. In this
-case the two values must be identical only if the segment is
-available.
-
-``` erlang
-PathMatch = "/hats/:name/[:name]".
-```
-
-If a binding is defined in both the host and path, then they must
-also share the same value.
-
-``` erlang
-PathMatch = "/:user/[...]".
-HostMatch = ":user.github.com".
-```
-
-Finally, there are two special match values that can be used. The
-first is the atom `'_'` which will match any host or path.
-
-``` erlang
-PathMatch = '_'.
-HostMatch = '_'.
-```
-
-The second is the special host match `"*"` which will match the
-wildcard path, generally used alongside the `OPTIONS` method.
-
-``` erlang
-HostMatch = "*".
-```
-
-Constraints
------------
-
-After the matching has completed, the resulting bindings can be tested
-against a set of constraints. Constraints are only tested when the
-binding is defined. They run in the order you defined them. The match
-will succeed only if they all succeed.
-
-They are always given as a two or three elements tuple, where the first
-element is the name of the binding, the second element is the constraint's
-name, and the optional third element is the constraint's arguments.
-
-The following constraints are currently defined:
-
- *  {Name, int}
- *  {Name, function, fun ((Value) -> true | {true, NewValue} | false)}
-
-The `int` constraint will check if the binding is a binary string
-representing an integer, and if it is, will convert the value to integer.
-
-The `function` constraint will pass the binding value to a user specified
-function that receives the binary value as its only argument and must
-return whether it fulfills the constraint, optionally modifying the value.
-The value thus returned can be of any type.
-
-Note that constraint functions SHOULD be pure and MUST NOT crash.
-
-Compilation
------------
-
-The structure defined in this chapter needs to be compiled before it is
-passed to Cowboy. This allows Cowboy to efficiently lookup the correct
-handler to run instead of having to parse the routes repeatedly.
-
-This can be done with a simple call to `cowboy_router:compile/1`.
-
-``` erlang
-Dispatch = cowboy_router:compile([
-    %% {HostMatch, list({PathMatch, Handler, Opts})}
-    {'_', [{'_', my_handler, []}]}
-]),
-%% Name, NbAcceptors, TransOpts, ProtoOpts
-cowboy:start_http(my_http_listener, 100,
-    [{port, 8080}],
-    [{env, [{dispatch, Dispatch}]}]
-).
-```
-
-Note that this function will return `{error, badarg}` if the structure
-given is incorrect.
-
-Live update
------------
-
-You can use the `cowboy:set_env/3` function for updating the dispatch
-list used by routing. This will apply to all new connections accepted
-by the listener.
-
-``` erlang
-cowboy:set_env(my_http_listener, dispatch,
-    cowboy_router:compile(Dispatch)).
-```
-
-Note that you need to compile the routes before updating.
diff --git a/guide/static_handlers.md b/guide/static_handlers.md
deleted file mode 100644
index 4e0bcfc..0000000
--- a/guide/static_handlers.md
+++ /dev/null
@@ -1,172 +0,0 @@
-Static handler
-==============
-
-The static handler is a built-in REST handler for serving files.
-It is available as a convenience and provides a quick solution
-for serving files during development.
-
-For systems in production, consider using one of the many
-Content Distribution Network (CDN) available on the market,
-as they are the best solution for serving files. They are
-covered in the next chapter. If you decide against using a
-CDN solution, then please look at the chapter after that,
-as it explains how to efficiently serve static files on
-your own.
-
-The static handler can serve either one file or all files
-from a given directory. It can also send etag headers for
-client-side caching.
-
-To use the static file handler, simply add routes for it
-with the appropriate options.
-
-Serve one file
---------------
-
-You can use the static handler to serve one specific file
-from an application's private directory. This is particularly
-useful to serve an `index.html` file when the client requests
-the `/` path, for example. The path configured is relative
-to the given application's private directory.
-
-The following rule will serve the file `static/index.html`
-from the application `my_app`'s priv directory whenever the
-path `/` is accessed.
-
-``` erlang
-{"/", cowboy_static, {priv_file, my_app, "static/index.html"}}
-```
-
-You can also specify the absolute path to a file, or the
-path to the file relative to the current directory.
-
-``` erlang
-{"/", cowboy_static, {file, "/var/www/index.html"}}
-```
-
-Serve all files from a directory
---------------------------------
-
-You can also use the static handler to serve all files that
-can be found in the configured directory. The handler will
-use the `path_info` information to resolve the file location,
-which means that your route must end with a `[...]` pattern
-for it to work. All files are served, including the ones that
-may be found in subfolders.
-
-You can specify the directory relative to an application's
-private directory.
-
-The following rule will serve any file found in the application
-`my_app`'s priv directory inside the `static/assets` folder
-whenever the requested path begins with `/assets/`.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets"}}
-```
-
-You can also specify the absolute path to the directory or
-set it relative to the current directory.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {dir, "/var/www/assets"}}
-```
-
-Customize the mimetype detection
---------------------------------
-
-By default, Cowboy will attempt to recognize the mimetype
-of your static files by looking at the extension.
-
-You can override the function that figures out the mimetype
-of the static files. It can be useful when Cowboy is missing
-a mimetype you need to handle, or when you want to reduce
-the list to make lookups faster. You can also give a
-hard-coded mimetype that will be used unconditionally.
-
-Cowboy comes with two functions built-in. The default
-function only handles common file types used when building
-Web applications. The other function is an extensive list
-of hundreds of mimetypes that should cover almost any need
-you may have. You can of course create your own function.
-
-To use the default function, you should not have to configure
-anything, as it is the default. If you insist, though, the
-following will do the job.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
-    [{mimetypes, cow_mimetypes, web}]}}
-```
-
-As you can see, there is an optional field that may contain
-a list of less used options, like mimetypes or etag. All option
-types have this optional field.
-
-To use the function that will detect almost any mimetype,
-the following configuration will do.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
-    [{mimetypes, cow_mimetypes, all}]}}
-```
-
-You probably noticed the pattern by now. The configuration
-expects a module and a function name, so you can use any
-of your own functions instead.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
-    [{mimetypes, Module, Function}]}}
-```
-
-The function that performs the mimetype detection receives
-a single argument that is the path to the file on disk. It
-is recommended to return the mimetype in tuple form, although
-a binary string is also allowed (but will require extra
-processing). If the function can't figure out the mimetype,
-then it should return `{<<"application">>, <<"octet-stream">>, []}`.
-
-When the static handler fails to find the extension in the
-list, it will send the file as `application/octet-stream`.
-A browser receiving such file will attempt to download it
-directly to disk.
-
-Finally, the mimetype can be hard-coded for all files.
-This is especially useful in combination with the `file`
-and `priv_file` options as it avoids needless computation.
-
-``` erlang
-{"/", cowboy_static, {priv_file, my_app, "static/index.html",
-    [{mimetypes, {<<"text">>, <<"html">>, []}}]}}
-```
-
-Generate an etag
-----------------
-
-By default, the static handler will generate an etag header
-value based on the size and modified time. This solution
-can not be applied to all systems though. It would perform
-rather poorly over a cluster of nodes, for example, as the
-file metadata will vary from server to server, giving a
-different etag on each server.
-
-You can however change the way the etag is calculated.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
-    [{etag, Module, Function}]}}
-```
-
-This function will receive three arguments: the path to the
-file on disk, the size of the file and the last modification
-time. In a distributed setup, you would typically use the
-file path to retrieve an etag value that is identical across
-all your servers.
-
-You can also completely disable etag handling.
-
-``` erlang
-{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
-    [{etag, false}]}}
-```
diff --git a/guide/toc.md b/guide/toc.md
deleted file mode 100644
index 5f652f1..0000000
--- a/guide/toc.md
+++ /dev/null
@@ -1,68 +0,0 @@
-Cowboy User Guide
-=================
-
-The Cowboy User Guide explores the modern Web and how to make
-best use of Cowboy for writing powerful web applications.
-
-Introducing Cowboy
-------------------
-
- *  [Introduction](introduction.md)
- *  [The modern Web](modern_web.md)
- *  [Erlang and the Web](erlang_web.md)
- *  [Erlang for beginners](erlang_beginners.md)
- *  [Getting started](getting_started.md)
-
-HTTP
-----
-
- *  [The life of a request](http_req_life.md)
- *  [Routing](routing.md)
- *  [Handling plain HTTP requests](http_handlers.md)
- *  [The Req object](req.md)
- *  [Reading the request body](req_body.md)
- *  [Sending a response](resp.md)
- *  [Using cookies](cookies.md)
-
-Multipart
----------
-
- *  [Introduction to multipart](multipart_intro.md)
- *  [Multipart requests](multipart_req.md)
-
-Static files
-------------
-
- *  [Static handler](static_handlers.md)
-
-REST
-----
-
- *  [REST principles](rest_principles.md)
- *  [Handling REST requests](rest_handlers.md)
- *  [REST flowcharts](rest_flowcharts.md)
- *  [Designing a resource handler](resource_design.md)
-
-Websocket
----------
-
- *  [The Websocket protocol](ws_protocol.md)
- *  [Handling Websocket connections](ws_handlers.md)
-
-Server push
------------
-
- *  [Loop handlers](loop_handlers.md)
-
-Pluggable interface
--------------------
-
- *  [Middlewares](middlewares.md)
- *  [Protocol upgrades](upgrade_protocol.md)
- *  [Hooks](hooks.md)
-
-Internals
----------
-
- *  [Architecture](architecture.md)
- *  [Dealing with broken clients](broken_clients.md)
diff --git a/guide/upgrade_protocol.md b/guide/upgrade_protocol.md
deleted file mode 100644
index db7a453..0000000
--- a/guide/upgrade_protocol.md
+++ /dev/null
@@ -1,37 +0,0 @@
-Protocol upgrades
-=================
-
-Cowboy features many different handlers, each for different purposes.
-All handlers have a common entry point: the `init/3` function.
-
-The default handler type is the simple HTTP handler.
-
-To switch to a different protocol, you must perform a protocol
-upgrade. This is what is done for Websocket and REST and is
-explained in details in the respective chapters.
-
-You can also create your own protocol on top of Cowboy and use
-the protocol upgrade mechanism to switch to it.
-
-For example, if you create the `my_protocol` module implementing
-the `cowboy_sub_protocol` behavior, then you can upgrade to it
-by simply returning the module name from `init/3`.
-
-``` erlang
-init(_, _, _Opts) ->
-    {upgrade, protocol, my_protocol}.
-```
-
-The `cowboy_sub_protocol` behavior only requires one callback,
-`upgrade/4`. It receives the Req object, the middleware environment,
-and the handler and options for this request. This is the same
-module as the `init/3` function and the same options that were
-passed to it.
-
-``` erlang
-upgrade(Req, Env, Handler, HandlerOpts) ->
-    %% ...
-```
-
-This callback is expected to behave like a middleware. Please
-see the corresponding chapter for more information.
diff --git a/guide/ws_handlers.md b/guide/ws_handlers.md
deleted file mode 100644
index 99f69dc..0000000
--- a/guide/ws_handlers.md
+++ /dev/null
@@ -1,230 +0,0 @@
-Handling Websocket connections
-==============================
-
-A special handler is required for handling Websocket connections.
-Websocket handlers allow you to initialize the connection,
-handle incoming frames from the socket, handle incoming Erlang
-messages and then clean up on termination.
-
-Websocket handlers essentially act as a bridge between the client
-and the Erlang system. They will typically do little more than
-socket communication and decoding/encoding of frames.
-
-Initialization
---------------
-
-First, the `init/3` callback is called. This callback is common
-to all handlers. To establish a Websocket connection, this function
-must return an `upgrade` tuple.
-
-``` erlang
-init(_, Req, Opts) ->
-	{upgrade, protocol, cowboy_websocket}.
-```
-
-It is also possible to return an update Req object and options
-using the longer form of this tuple.
-
-``` erlang
-init(_Type, Req, Opts) ->
-	{upgrade, protocol, cowboy_websocket, Req, Opts}.
-```
-
-Upon receiving this tuple, Cowboy will switch to the code
-that handles Websocket connections. It does not immediately
-perform the handshake however. First, it calls the `websocket_init/3`
-callback.
-
-This function must be used to initialize the state, and can
-also be used to register the process, start a timer, etc.
-As long as the function returns an `ok` tuple, then Cowboy
-performs the Websocket handshake.
-
-``` erlang
-websocket_init(_Type, Req, _Opts) ->
-    {ok, Req, #state{}}.
-```
-
-A `shutdown` tuple can be returned to refuse to perform the
-handshake. When doing so, Cowboy will send a `400 Bad Request`
-response to the client and close the connection.
-
-``` erlang
-websocket_init(_Type, Req, _Opts) ->
-	{shutdown, Req}.
-```
-
-It is also possible to perform a `cowboy_req:reply/{2,3,4}`
-before returning a `shutdown` tuple, allowing you to override
-the response sent back to the client.
-
-Note that browser support for handling Websocket connection
-failures may vary.
-
-If the sec-websocket-protocol header was sent with the request
-for establishing a Websocket connection, then the Websocket
-handler *must* select one of these subprotocol and send it
-back to the client, otherwise the client might decide to close
-the connection, assuming no correct subprotocol was found.
-
-``` erlang
-websocket_init(_Type, Req, _Opts) ->
-	case cowboy_req:parse_header(<<"sec-websocket-protocol">>, Req) of
-		{ok, undefined, Req2} ->
-			{ok, Req, #state{}};
-		{ok, Subprotocols, Req2} ->
-			case lists:keymember(<<"mychat2">>, 1, Subprotocols) of
-				true ->
-					Req3 = cowboy:set_resp_header(<<"sec-websocket-protocol">>,
-						<<"mychat2">>, Req2),
-					{ok, Req3, #state{}};
-				false ->
-					{shutdown, Req2}
-			end
-	end.
-```
-
-It is not recommended to wait too long inside the `websocket_init/3`
-function. Any extra initialization may be done after returning by
-sending yourself a message before doing anything. Any message sent
-to `self()` from `websocket_init/3` is guaranteed to arrive before
-any frames from the client.
-
-It is also very easy to ensure that this message arrives before
-any message from other processes by sending it before registering
-or enabling timers.
-
-``` erlang
-websocket_init(_Type, Req, _Opts) ->
-	self() ! post_init,
-	%% Register process here...
-	{ok, Req, #state{}}.
-
-websocket_info(post_init, Req, State) ->
-	%% Perform post_init initialization here...
-	{ok, Req, State}.
-```
-
-Handling frames from the client
--------------------------------
-
-Cowboy will call `websocket_handle/3` whenever a text, binary,
-ping or pong frame arrives from the client. Note that in the
-case of ping and pong frames, no action is expected as Cowboy
-automatically replies to ping frames.
-
-The handler can decide to send frames to the socket, shutdown
-or just continue without sending anything.
-
-The following snippet echoes back any text frame received and
-ignores all others.
-
-``` erlang
-websocket_handle(Frame = {text, _}, Req, State) ->
-	{reply, Frame, Req, State};
-websocket_handle(_Frame, Req, State) ->
-	{ok, Req, State}.
-```
-
-Handling Erlang messages
-------------------------
-
-Cowboy will call `websocket_info/3` whenever an Erlang message
-arrives.
-
-The handler can decide to send frames to the socket, shutdown
-or just continue without sending anything.
-
-The following snippet forwards any `log` message to the socket
-and ignores all others.
-
-``` erlang
-websocket_info({log, Text}, Req, State) ->
-	{reply, {text, Text}, Req, State};
-websocket_info(_Info, Req, State) ->
-	{ok, Req, State}.
-```
-
-Sending frames to the socket
-----------------------------
-
-Cowboy allows sending either a single frame or a list of
-frames to the socket. Any frame can be sent: text, binary, ping,
-pong or close frames.
-
-The following example sends three frames using a single `reply`
-tuple.
-
-``` erlang
-websocket_info(hello_world, Req, State) ->
-	{reply, [
-		{text, "Hello"},
-		{text, <<"world!">>},
-		{binary, <<0:8000>>}
-	], Req, State};
-%% More websocket_info/3 clauses here...
-```
-
-Note that the payload for text and binary frames is of type
-`iodata()`, meaning it can be either a `binary()` or an
-`iolist()`.
-
-Sending a `close` frame will immediately initiate the closing
-of the Websocket connection. Be aware that any additional
-frames sent by the client or any Erlang messages waiting to
-be received will not be processed. Also note that when replying
-a list of frames that includes close, any frame found after the
-close frame will not be sent.
-
-Ping and timeout
-----------------
-
-The biggest performance improvement you can do when dealing
-with a huge number of Websocket connections is to reduce the
-number of timers that are started on the server. A common use
-of timers when dealing with connections is for sending a ping
-every once in a while. This should be done exclusively on the
-client side. Indeed, a server handling one million Websocket
-connections will perform a lot better when it doesn't have to
-handle one million extra timers too!
-
-Cowboy will automatically respond to ping frames sent by the
-client. It will still forward the frame to the handler for
-informative purpose, but no further action is required.
-
-Cowboy can be configured to automatically close the Websocket
-connection when no data arrives on the socket. It is highly
-recommended to configure a timeout for it, as otherwise you
-may end up with zombie "half-connected" sockets that may
-leave the process alive forever.
-
-A good timeout value is 60 seconds.
-
-``` erlang
-websocket_init(_Type, Req, _Opts) ->
-	{ok, Req, #state{}, 60000}.
-```
-
-This value cannot be changed once it is set. It defaults to
-`infinity`.
-
-Hibernate
----------
-
-Most tuples returned from handler callbacks can include an
-extra value `hibernate`. After doing any necessary operations
-following the return of the callback, Cowboy will hibernate
-the process.
-
-It is highly recommended to hibernate processes that do not
-handle much traffic. It is a good idea to hibernate all
-connections by default and investigate only when you start
-noticing increased CPU usage.
-
-Supporting older browsers
--------------------------
-
-Unfortunately Websocket is a relatively recent technology,
-which means that not all browsers support it. A library like
-[Bullet](https://github.com/extend/bullet) can be used to
-emulate Websocket connections on older browsers.
diff --git a/guide/ws_protocol.md b/guide/ws_protocol.md
deleted file mode 100644
index 390751e..0000000
--- a/guide/ws_protocol.md
+++ /dev/null
@@ -1,45 +0,0 @@
-The Websocket protocol
-======================
-
-This chapter explains what Websocket is and why it is
-a vital component of soft realtime Web applications.
-
-Description
------------
-
-Websocket is an extension to HTTP that emulates plain TCP
-connections between the client, typically a Web browser,
-and the server. It uses the HTTP Upgrade mechanism to
-establish the connection.
-
-Websocket connections are asynchronous, unlike HTTP. This
-means that not only can the client send frames to the server
-at any time, but the server can also send frames to the client
-without the client initiating anything other than the
-Websocket connection itself. This allows the server to push
-data to the client directly.
-
-Websocket is an IETF standard. Cowboy supports the standard
-and all drafts that were previously implemented by browsers,
-excluding the initial flawed draft sometimes known as
-"version 0".
-
-Implementation
---------------
-
-Cowboy implements Websocket as a protocol upgrade. Once the
-upgrade is performed from the `init/3` callback, Cowboy
-switches to Websocket. Please consult the next chapter for
-more information on initiating and handling Websocket
-connections.
-
-The implementation of Websocket in Cowboy is validated using
-the Autobahn test suite, which is an extensive suite of tests
-covering all aspects of the protocol. Cowboy passes the
-suite with 100% success, including all optional tests.
-
-Cowboy's Websocket implementation also includes the
-x-webkit-deflate-frame compression draft which is being used
-by some browsers to reduce the size of data being transmitted.
-Cowboy will automatically use compression as long as the
-`compress` protocol option is set when starting the listener.