Update Cowboy to 2.4.0

Makefile

@@ -2,7 +2,7 @@
 
 PROJECT = cowboy
 PROJECT_DESCRIPTION = Small, fast, modern HTTP server.
-PROJECT_VERSION = 2.3.0
+PROJECT_VERSION = 2.4.0
 PROJECT_REGISTERED = cowboy_clock
 
 # Options.

doc/src/guide/book.asciidoc

@@ -73,6 +73,8 @@ include::middlewares.asciidoc[Middlewares]
 
 = Additional information
 
+include::migrating_from_2.3.asciidoc[Migrating from Cowboy 2.3 to 2.4]
+
 include::migrating_from_2.2.asciidoc[Migrating from Cowboy 2.2 to 2.3]
 
 include::migrating_from_2.1.asciidoc[Migrating from Cowboy 2.1 to 2.2]

doc/src/guide/getting_started.asciidoc

@@ -69,7 +69,7 @@ fetch and compile Cowboy:
 PROJECT = hello_erlang
 
 DEPS = cowboy
-dep_cowboy_commit = 2.3.0
+dep_cowboy_commit = 2.4.0
 
 DEP_PLUGINS = cowboy
 

doc/src/guide/migrating_from_2.3.asciidoc

@@ -0,0 +1,66 @@
+[appendix]
+== Migrating from Cowboy 2.3 to 2.4
+
+Cowboy 2.4 focused on improving the HTTP/2 implementation.
+All existing tests from RFC7540 and the h2spec test suite
+now all pass. Numerous options have been added to control
+SETTINGS and related behavior. In addition experimental
+support for Websocket over HTTP/2 was added.
+
+=== Features added
+
+* Add experimental support for Websocket over HTTP/2.
+  You can use the `enable_connect_protocol` option to
+  enable. It implements the following draft:
+  https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01
+
+* Add options `max_decode_table_size` and
+  `max_encode_table_size` to restrict the size of the
+  HPACK compression dictionary.
+
+* Add option `max_concurrent_streams` to restrict the
+  number of HTTP/2 streams that can be opened concurrently.
+
+* Add options `initial_connection_window_size` and
+  `initial_stream_window_size` to restrict the size of
+  the HTTP/2 request body buffers for the whole connection
+  and per stream, respectively.
+
+* Add options `max_frame_size_received` and
+  `max_frame_size_sent` to restrict the size of
+  HTTP/2 frames.
+
+* Add option `settings_timeout` to reject clients that
+  did not send a SETTINGS ack. Note that this currently
+  may only occur at the beginning of the connection.
+
+* Update Ranch to 1.5.0
+
+* Update Cowlib to 2.3.0
+
+=== Bugs fixed
+
+* Fix the END_STREAM flag for informational responses
+  when using HTTP/2.
+
+* Receive and ignore HTTP/2 request trailers if any
+  for HTTP/2 requests. Request trailer information will
+  be propagated to the user code in a future release.
+
+* Reject WINDOW_UPDATE frames that are sent after the
+  client sent an RST_STREAM. Note that Cowboy will not
+  keep state information about terminated streams
+  forever and so the behavior might differ depending
+  on when the stream was reset.
+
+* Reject streams that depend on themselves. Note that
+  Cowboy currently does not implement HTTP/2's priority
+  mechanisms so this issue was harmless.
+
+* Reject HTTP/2 requests where the body size is different
+  than the content-length value. Note that due to how Cowboy
+  works some requests might go through regardless, for
+  example when the user code does not read the request body.
+
+* Fix all existing test failures from RFC7540. This was
+  mostly incorrect test cases or intermittent failures.

ebin/cowboy.app

@@ -1,6 +1,6 @@
 {application, 'cowboy', [
 	{description, "Small, fast, modern HTTP server."},
-	{vsn, "2.3.0"},
+	{vsn, "2.4.0"},
 	{modules, ['cowboy','cowboy_app','cowboy_bstr','cowboy_children','cowboy_clear','cowboy_clock','cowboy_compress_h','cowboy_constraints','cowboy_handler','cowboy_http','cowboy_http2','cowboy_iolists','cowboy_loop','cowboy_metrics_h','cowboy_middleware','cowboy_req','cowboy_rest','cowboy_router','cowboy_static','cowboy_stream','cowboy_stream_h','cowboy_sub_protocol','cowboy_sup','cowboy_tls','cowboy_tracer_h','cowboy_websocket']},
 	{registered, [cowboy_sup,cowboy_clock]},
 	{applications, [kernel,stdlib,crypto,cowlib,ranch]},