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path: root/src/cowboy_websocket.erl
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2019-04-03Bind erlang:get_stacktrace prior to making other callsSteve Strong
If we bind too late there might be an exception triggered in the terminate function and we will not get the correct stacktrace as a result.
2018-11-16Add the set_options Websocket commandLoïc Hoguin
It allows overriding the idle_timeout option only for now.
2018-11-13Add the {deflate, boolean()} Websocket commandLoïc Hoguin
It allows to temporarily disable Websocket compression when it was negotiated. It's ignored otherwise. This can be used as fine-grained control when some frames do not compress well.
2018-11-12Add deflate options for Websocket compressionLoïc Hoguin
They allow the server to configure what it is willing to accept for both the negotiated configuration (takeover and window bits) and the other zlib options (level, mem_level and strategy). This can be used to reduce the memory and/or CPU footprint of the compressed data, which comes with a cost in compression ratio.
2018-10-31Always dialyze tests and fix some cowboy_req specsLoïc Hoguin
2018-09-21Add the {active, boolean()} Websocket commandLoïc Hoguin
This command is currently not documented. It allows disabling the reading of incoming data from the socket, and can be used as a poor man's flow control.
2018-09-11Add a commands-based interface to Websocket handlersLoïc Hoguin
This feature is currently experimental. It will become the preferred way to use Websocket handlers once it becomes documented. A commands-based interface enables adding commands without having to change the interface much. It mirrors the interface of stream handlers or gen_statem. It will enable adding commands that have been needed for some time but were not implemented for fear of making the interface too complex.
2018-06-27Disable warnings for erlang:get_stacktrace/0 in OTP-21+Loïc Hoguin
2018-06-26Add missing frame types to websocket_handle specs/docsLoïc Hoguin
Thanks Artem.
2018-04-04Fix Dialyzer warningsLoïc Hoguin
2018-04-04Add initial implementation of Websocket over HTTP/2Loïc Hoguin
Using the current draft: https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01
2018-03-28Add max_frame_size option for websocket handlersKirill Kinduk
Option allows to limit a frame by size before decoding its payload. LH: I have added a test for when the limit is reached on a nofin fragmented frame (the last commit addressed that case but it had no test). I have fixed formatting and other, and changed the default value to infinity since it might otherwise be incompatible with existing code. I also added documentation and a bunch of other minor changes.
2018-03-23Merge the two separate receive loops in cowboy_websocketLoïc Hoguin
Also rename a bunch of functions to make the code easier to read.
2018-03-14Fix a Dialyzer warningLoïc Hoguin
2018-03-13Handle system messages in cowboy_websocketLoïc Hoguin
2018-03-13Handle supervisor calls properly everywhereLoïc Hoguin
2017-12-13Fix Dialyzer warningsLoïc Hoguin
2017-12-06Send a 426 when Websocket is required and client didn't upgradeLoïc Hoguin
2017-11-01Update Cowlib to 2.0.1 and fix OTP 20.1+ Websocket compressionLoïc Hoguin
Unfortunately compression will be disabled for 20.1, 20.1.1 and 20.1.2. In additiona I do not recommend 20.1.3 due to issues inflating some specific sizes.
2017-10-31Add some todosLoïc Hoguin
2017-05-28Introduce the req_filter Websocket optionLoïc Hoguin
This option allows customizing the compacting of the Req object when using Websocket. By default it will keep most public fields excluding headers of course, since those can be large.
2017-02-18Ensure Websocket errors result in a crash logLoïc Hoguin
2017-02-18Allow passing options to sub protocolsLoïc Hoguin
Before this commit we had an issue where configuring a Websocket connection was simply not possible without doing magic, adding callbacks or extra return values. The init/2 function only allowed setting hibernate and timeout options. After this commit, when switching to a different type of handler you can either return {module, Req, State} or {module, Req, State, Opts} where Opts is any value (as far as the sub protocol interface is concerned) and is ultimately checked by the custom handlers. A large protocol like Websocket would accept only a map there, with many different options, while a small interface like loop handlers would allow passing hibernate and nothing else. For Websocket, hibernate must be set from the websocket_init/1 callback, because init/2 executes in a separate process. Sub protocols now have two callbacks: one with the Opts value, one without. The loop handler code was largely reworked and simplified. It does not need to manage a timeout or read from the socket anymore, it's the job of the protocol code. A lot of unnecessary stuff was therefore removed. Websocket compression must now be enabled from the handler options instead of per listener. This means that a project can have two separate Websocket handlers with different options. Compression is still disabled by default, and the idle_timeout value was changed from inifnity to 60000 (60 seconds), as that's safer and is also a good value for mobile devices.
2017-01-02Welcome to 2017Loïc Hoguin
2017-01-02Numerous Dialyzer fixesLoïc Hoguin
2016-08-15Send many frames in one TCP sendLoïc Hoguin
Includes refactoring of the related code to avoid repetition.
2016-08-15Allow websocket_init/1 to reply/close/hibernateLoïc Hoguin
2016-08-15Modernize the Websocket test suiteLoïc Hoguin
2016-08-12Remove Req from the Websocket interfaceLoïc Hoguin
After the switch to Websocket, we are no longer in a request/response scenario, therefore a lot of the cowboy_req functions do not apply anymore. Any data required from the request will need to be taken from Req in init/2 and saved in the handler's state.
2016-08-12Merge branch 'master' of https://github.com/camshaft/cowboyLoïc Hoguin
2016-08-12Fix Websocket compressionLoïc Hoguin
The option for enabling Websocket compression has been renamed. Previously it was shared with HTTP compression, now it's specific to Websocket. The new option is named 'websocket_compress'.
2016-08-11Fix timer-sent events in the websocket exampleLoïc Hoguin
2016-08-10Use binary_to_integer instead of to list and backLoïc Hoguin
2016-08-10Let the stream handler take care of crash handling and loggingLoïc Hoguin
2016-08-10Make reply functions return ReqLoïc Hoguin
2016-08-10Add a lot of todosLoïc Hoguin
2016-06-27send resp_headers with websocket responsesCameron Bytheway
2016-03-06Fix warningsLoïc Hoguin
2016-03-05Initial commit with connection/streamsLoïc Hoguin
Breaking changes with previous commit. This is a very large change, and I am giving up on making a single commit that fixes everything. More commits will follow slowly adding back features, introducing new tests and fixing the documentation. This change contains most of the work toward unifying the interface for handling both HTTP/1.1 and HTTP/2. HTTP/1.1 connections are now no longer 1 process per connection; instead by default 1 process per request is also created. This has a number of pros and cons. Because it has cons, we also allow users to use a lower-level API that acts on "streams" (requests/responses) directly at the connection process-level. If performance is a concern, one can always write a stream handler. The performance in this case will be even greater than with Cowboy 1, although all the special handlers are unavailable. When switching to Websocket, after the handler returns from init/2, Cowboy stops the stream and the Websocket protocol takes over the connection process. Websocket then calls websocket_init/2 for any additional initialization such as timers, because the process is different in init/2 and websocket_*/* functions. This however would allow us to use websocket_init/2 for sending messages on connect, instead of sending ourselves a message and be subject to races. Note that websocket_init/2 is optional. This is all a big change and while most of the tests pass, some functionality currently doesn't. SPDY is broken and will be removed soon in favor of HTTP/2. Automatic compression is currently disabled. The cowboy_req interface probably still have a few functions that need to be updated. The docs and examples do not refer the current functionality anymore. Everything will be fixed over time. Feedback is more than welcome. Open a ticket!
2015-07-27Add optional callbacksLoïc Hoguin
Mostly useful for REST, which has a ton. This is an initial commit, it still needs to be tested, but it's time to sleep.
2015-05-07Exit with exit/1 on handler exception and include class in reasonJames Fish
2015-03-06Update Cowlib to 1.2.0; adds Websocket permessage-deflateLoïc Hoguin
The Websocket text frames should also be less resource intensive to validate now, with a binary concatenation avoided.
2015-02-16Use cow_ws for the Websocket parsing codeLoïc Hoguin
Updates Cowlib to 1.1.0
2014-11-07Rename 'shutdown' close reason and tuples to 'stop'Loïc Hoguin
The 'shutdown' atom has a specific meaning inside OTP. We are instead going to use 'stop' which is pretty much the equivalent of what we actually do. 'shutdown' is now reserved for future special processes implementation.
2014-10-03Replace some /binary to /bits in binary pattern matchingLoïc Hoguin
We don't need the extra check for multiple of 8 bits.
2014-09-30Improve handler interface and documentationLoïc Hoguin
This change simplifies a little more the sub protocols mechanism. Aliases have been removed. The renaming of loop handlers as long polling handlers has been reverted. Plain HTTP handlers now simply do their work in the init/2 callback. There is no specific code for them. Loop handlers now follow the same return value as Websocket, they use ok to continue and shutdown to stop. Terminate reasons for all handler types have been documented. The terminate callback is now appropriately called in all cases (or should be). Behaviors for all handler types have been moved in the module that implement them. This means that cowboy_handler replaces the cowboy_http_handler behavior, and similarly cowboy_loop replaces cowboy_loop_handler, cowboy_websocket replaces cowboy_websocket_handler. Finally cowboy_rest now has the start of a behavior in it and will have the full list of optional callbacks defined once Erlang 18.0 gets released. The guide has been reorganized and should be easier to follow.
2014-09-26Unify the init and terminate callbacksLoïc Hoguin
This set of changes is the first step to simplify the writing of handlers, by removing some extraneous callbacks and making others optional. init/3 is now init/2, its first argument being removed. rest_init/2 and rest_terminate/2 have been removed. websocket_init/3 and websocket_terminate/3 have been removed. terminate/3 is now optional. It is called regardless of the type of handler, including rest and websocket. The return value of init/2 changed. It now returns {Mod, Req, Opts} with Mod being either one of the four handler type or a custom module. It can also return extra timeout and hibernate options. The signature for sub protocols has changed, they now receive these extra timeout and hibernate options. Loop handlers are now implemented in cowboy_long_polling, and will be renamed throughout the project in a future commit.
2014-09-23Breaking update of the cowboy_req interfaceLoïc Hoguin
Simplify the interface for most cowboy_req functions. They all return a single value except the four body reading functions. The reply functions now only return a Req value. Access functions do not return a Req anymore. Functions that used to cache results do not have a cache anymore. The interface for accessing query string and cookies has therefore been changed. There are now three query string functions: qs/1 provides access to the raw query string value; parse_qs/1 returns the query string as a list of key/values; match_qs/2 returns a map containing the values requested in the second argument, after applying constraints and default value. Similarly, there are two cookie functions: parse_cookies/1 and match_cookies/2. More match functions will be added in future commits. None of the functions return an error tuple anymore. It either works or crashes. Cowboy will attempt to provide an appropriate status code in the response of crashed handlers. As a result, the content decode function has its return value changed to a simple binary, and the body reading functions only return on success.
2014-07-12Drop R15 supportLoïc Hoguin
2014-07-12Reply with 400 on header parsing crashLoïc Hoguin
This is a first step to improve the HTTP status codes returned by Cowboy on crashes. We will tweak it over time. Also fixes a small bug where two replies may have been sent when using loop handlers under rare conditions.