CHANGELOG ========= 0.8.1 ----- * Add eventsource, web_server examples; improve rest_pastebin example * Add cowboy:set_env/3 to more conveniently update the dispatch list * Add cowboy_sub_protocol behaviour * Fix cowboy_req:has_body/1 when Content-Length == 0 * Fix passing of state to websocket_terminate/3 on server close * Fix compilation with +native * Compile with more warnings enabled by default; fix warnings * Set the socket in passive mode after the loop handler terminates * Improve typespecs 0.8.0 ----- * This release drops R14 compatibility Behaviours now use the -callback attribute which is supported only since R15B. * Add a user guide * Add or update many examples Add basic_auth, compress_response, cookie, elixir_hello_world, markdown_middleware, rest_pastebin, rest_stream_response and websocket examples. Rename the static example to static_world for clarity. * Add CONTRIBUTING.md file * Use Ranch 0.6.1 for connection handling To start listeners you can now use cowboy:start_http/4 for HTTP, and cowboy:start_https/4 for HTTPS. The proper transport and protocol modules will be used. * Add protection against slowloris vulnerability This protection is always enabled and has no impact on the performance of the system. * Add a better routing syntax * If a binding is used twice in routing, values must now be identical * Add support for a configurable chain of middlewares Routing and handling are now two separate middlewares that can be replaced as needed. * Fix application dependencies The crypto application must be started before Cowboy. The inets application is no longer needed. A few functions from that application were used by mistake in the REST code. * Shorten the name of many modules * cowboy_http_protocol becomes cowboy_protocol * cowboy_http_req becomes cowboy_req * cowboy_http_rest becomes cowboy_rest * cowboy_http_static becomes cowboy_static * cowboy_http_websocket becomes cowboy_websocket * Introduce the cowboy_req:req() opaque type The include/http.hrl file was removed. Users are expected to use the cowboy_req API to access or modify the Req object. This required a lot of changes so cleanup and optimizations were performed where possible. * Add many cowboy_req functions * cowboy_req:delete_resp_header/2 deletes a previously set resp header * cowboy_req:set_meta/3 sets metadata in the Req object * cowboy_req:to_list/1 converts the Req object to a list of key/values * cowboy_req:fragment/1 returns the request URL fragment * cowboy_req:host_url/1 returns the request URL without the path or qs * cowboy_req:url/1 returns the full request URL * cowboy_req:set_resp_body_fun/2 for body streaming with no known length * Improve the body streaming interface in cowboy_req The function now receives the Transport and Socket directly as arguments. * Rename or drop many cowboy_req functions * cowboy_req:raw_host/1 becomes cowboy_req:host/1, old function dropped * cowboy_req:raw_path/1 becomes cowboy_req:path/1, old function dropped * cowboy_req:raw_qs/1 becomes cowboy_req:qs/1 * Remove cowboy_req:body/2 * Remove cowboy_req:transport/1 * Change the signature of many cowboy_req functions * parse_header now returns {ok, any(), Req} instead of {any(), Req} * body_qs now returns {ok, QsVals, Req} instead of {QsVals, Req} * multipart_data now returns {headers, Headers, Req} instead of {{headers, Headers}, Req} and {body, Body, Req} instead of {{body, Body}, Req} * set_resp_* functions now return Req instead of {ok, Req} * has_body now returns boolean() * Rewrote cookie code In short we now do the same thing as PHP when setting cookies. This allows us to be fairly confident that our code will work on the vast majority of browsers. * Fix consistency issues caused by erlang:decode_packet/3 * The method is now always a case sensitive binary string * Note that standard method names are uppercase (e.g. <<"GET">>) * Header names are now always lowercase binary string * The max_line_length cowboy_protocol option was replaced by 3 new options: * max_request_line_length, defaults to 4096 bytes * max_header_name_length, defaults to 64 bytes * max_header_value_length, defaults to 4096 bytes * Add max_headers option, limiting the number of headers; defaults to 100 * The max_keepalive option now defaults to 100 instead of infinity * Change terminate/2 to terminate/3 in the HTTP handler interface * Enhance the loop handler API * Connection close is now better detected * Fix an internal message leak * Enhance the Websocket API * Change a websocket error from {error, protocol} to {error, badframe} * Allow websocket handlers to reply more than one frame * Check for errors when calling Transport:send/2 to avoid crashes * Add close, {close, Payload}, {close, StatusCode, Payload}, ping, pong frame types for replies * Ensure websocket_terminate is always called * Improve timeout handling * Remove support for the old hixie76 protocol * Add parsing support for Sec-Websocket-Protocol * Check for UTF-8 correctness of text frames * Perform unmasking and UTF-8 validation on the fly * Reject clients that send unmasked frames * Add cowboy_websocket:close_code/0 type * Enhance the REST API * Fix charset handling * Add PATCH support * Add created_path callback, used if create_path was not defined * Make sure rest_terminate is always called * Improved HTTP standard compatibility * Revised status code used in responses * Implement authorization header parsing * Add opt-in automatic response body compression * Improve lager compatibility We format errors in a special way so that lager can recognize Cowboy errors and put them on a single line. * Remove the urldecode cowboy_protocol option * Add cowboy_protocol:onrequest_fun/0 and :onresponse_fun/0 types * Add the body data to onresponse_fun/0 callback * Avoid a duplicate HTTP reply in cowboy_websocket:upgrade_error/1 * Fix use of the Vary header, was named Variances in the previous code * Improve returned status code for HTTP and REST * Fix charsets_provided return value * Allow passing {M, F} for the mimetype function to cowboy_static * Can now upgrade protocols with {upgrade, protocol, P, Req, Opts} * Cowboy now only expects universal time, never local time * Do not try skipping the body if the connection is to be closed * Add cowboy_bstr:to_upper/1, cowboy_bstr:capitalize_token/1 * Many, many optimizations for the most critical code path 0.6.1 ----- * Add hello_world, rest_hello_world, chunked_hello_world, echo_get, echo_post and static examples. * Add support for the "Expect: 100-continue" header. * Keep the original 'Host' header value instead of modifying it. * Fix use of parsed headers cache. * REST: fix the matching of charsets. * REST: allow <<"type/subtype">> format for content_types_accepted. * Improve typespecs. 0.6.0 ----- * Add multipart support * Add chunked transfer decoding support Done by reworking the body reading API. Now all the body reading goes through the cowboy_http_req:stream_body/1 function. This function takes care of handling both the Transfer-Encoding and the Content-Encoding, returning properly decoded data ready for consumption. * Add fragmented websocket messages support Properly tested by the addition of the Autobahn websocket test suite to our toolbox. All tests pass except a few related to UTF-8 handling, as Cowboy does no checks on that end at this point. * Add 'onrequest' and 'onresponse' hooks The first can be used for all the special cases you may have that can't be dealt with otherwise. It's also pretty good for writing access logs or rewriting URLs. The second can be used for logging errors or replacing error pages, amongst others. * Add cowboy:get_protocol_options/1 and cowboy:set_protocol_options/2 These functions allow for retrieving a listener's protocol options, and for modifying them while the listener is running. This is most useful to upgrade the dispatch list. The upgrade applies to all the future connections. * Add the sockname/1 function to TCP and SSL transports * Improve SSL transport support Add support for specifying the ciphers. Add CA support. Make specifying the password optional. * Add new HTTP status codes from RFC 6585 * Add a 'file' option to cowboy_http_static This allows for mapping /folder/ paths to a /folder/index.html file. * Add the '*' catch all Content-Type for REST * Add {halt, Req, State} as a possible return value for REST * Add absolute URI support for requests * Add cowboy_http:x_www_form_urlencoded/2 * Various REST bug fixes * Do not send chunked replies for HTTP/1.0 connections * Fix a DST bug in the cookies code * Fix a bug with setting cookie values containing slashes * Fix a small timer leak when using loop/websocket timeouts * Make charset and media type parsing more relaxed This is to accomodate some widely used broken clients. * Make error messages more readable * Fix and improve type specifications * Fix a bug preventing documentation from being generated * Small improvements to the documentation * Rework the HTTP test suite The suite now uses an integrated Cowboy HTTP client. The client is currently experimental and shouldn't be used. * Add many many tests. 0.4.0 ----- * Set the cowboy_listener process priority to high As it is the central process used by all incoming requests we need to set its priority to high to avoid timeouts that would happen otherwise when reaching a huge number of concurrent requests. * Add cowboy:child_spec/6 for embedding in other applications * Add cowboy_http_rest, an experimental REST protocol support Based on the Webmachine diagram and documentation. It is a new implementation, not a port, therefore a few changes have been made. However all the callback names are the same and should behave similarly to Webmachine. There is currently no documentation other than the Webmachine resource documentation and the comments found in cowboy_http_rest, which itself should be fairly easy to read and understand. * Add cowboy_http_static, an experimental static file handler Makes use of the aforementioned REST protocol support to deliver files with proper content type and cache headers. Note that this uses the new file:sendfile support when appropriate, which currently requires the VM to be started with the +A option defined, else errors may randomly appear. * Add cowboy_bstr module for binary strings related functions * Add cowboy_http module for HTTP parsing functions This module so far contains various functions for HTTP header parsing along with URL encoding and decoding. * Remove quoted from the default dependencies This should make Cowboy much easier to compile and use by default. It is of course still possible to use quoted as your URL decoding library in Cowboy thanks to the newly added urldecode option. * Fix supervisor spec for non dynamic modules to allow upgrades to complete * Add cowboy:accept_ack/1 for a cleaner handling of the shoot message Before, when the listener accepted a connection, the newly created process was waiting for a message containing the atom 'shoot' before proceeding. This has been replaced by the cowboy:accept_ack/1 function. This function should be used where 'shoot' was received because the contents of the message have changed (and could change again in the distant future). * Update binary parsing expressions to avoid hype crashes More specifically, /bits was replaced by /binary. * Rename the type cowboy_dispatcher:path_tokens/0 to tokens/0 * Remove the cowboy_clock:date/0, time/0 and datetime/0 types The calendar module exports those same types properly since R14B04. * Add cacertfile configuration option to cowboy_ssl_transport * Add cowboy_protocol behaviour * Remove -Wbehaviours dialyzer option unavailable in R15B * Many tests and specs improvements ### cowboy_http_req * Fix a crash when reading the request body * Add parse_header/2 and parse_header/3 The following headers can now be semantically parsed: Connection, Accept, Accept-Charset, Accept-Encoding, Accept-Language, Content-Length, Content-Type, If-Match, If-None-Match, If-Modified-Since, If-Unmodified-Since, Upgrade * Add set_resp_header/3, set_resp_cookie/4 and set_resp_body/2 These functions allow handlers to set response headers and body without having to reply directly. * Add set_resp_body_fun/3 This function allows handlers to stream the body of the response using the given fun. The size of the response must be known beforehand. * Add transport/1 to obtain the transport and socket for the request This allows handlers to have low-level socket access in those cases where they do need it, like when streaming a response body with set_resp_body_fun/3. * Add peer_addr/1 This function tries to guess the real peer IP based on the HTTP headers received. * Add meta/2 and meta/3 to save useful protocol information Currently used to save the Websocket protocol version currently used, and to save request information in the REST protocol handler. * Add reply/2 and reply/3 aliases to reply/4 * Add upgrade_reply/3 for protocol upgrades ### cowboy_http_protocol * Add the {urldecode, fun urldecode/2} option Added when quoted was removed from the default build. Can be used to tell Cowboy to use quoted or any other URL decoding routine. * Add the max_keepalive option * Add the max_line_length option * Allow HTTP handlers to stop during init/3 To do so they can return {shutdown, Req, State}. * Add loops support in HTTP handlers for proper long-polling support A loop can be entered by returning either of {loop, Req, State}, {loop, Req, State, hibernate}, {loop, Req, State, Timeout} or {loop, Req, State, Timeout, hibernate} from init/3. Loops are useful when we cannot reply immediately and instead are waiting for an Erlang message to be able to complete the request, as would typically be done for long-polling. Loop support in the protocol means that timeouts and hibernating are well tested and handled so you can use those options without worrying. It is recommended to set the timeout option. When a loop is started, handle/2 will never be called so it does not need to be defined. When the request process receives an Erlang message, it will call the info/3 function with the message as the first argument. Like in OTP, you do need to set timeout and hibernate again when returning from info/3 to enable them until the next call. * Fix the sending of 500 errors when handlers crash Now we send an error response when no response has been sent, and do nothing more than close the connection if anything did get sent. * Fix a crash when the server is sent HTTP responses * Fix HTTP timeouts handling when the Request-Line wasn't received * Fix the handling of the max number of empty lines between requests * Fix the handling of HEAD requests * Fix HTTP/1.0 Host header handling * Reply status 400 if we receive an unexpected value or error for headers * Properly close when the application sends "Connection: close" header * Close HTTP connections on all errors * Improve the error message for HTTP handlers ### cowboy_http_websocket * Add websocket support for all versions up to RFC 6455 Support isn't perfect yet according to the specifications, but is working against all currently known client implementations. * Allow websocket_init/3 to return with the hibernate option set * Add {shutdown, Req} return value to websocket_init/3 to fail an upgrade * Fix websocket timeout handling * Fix error messages: wrong callback name was reported on error * Fix byte-by-byte websocket handling * Fix an issue when using hixie-76 with certain proxies * Fix a crash in the hixie-76 handshake * Fix the handshake when SSL is used on port 443 * Fix a crash in the handshake when cowboy_http_req:compact/1 is used * Fix handshake when a query string is present * Fix a crash when the Upgrade header contains more than one token 0.2.0 ----- * Initial release.