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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.
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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'.
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Now named read_part/read_part_body, with a verb indicating action.
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This is a large commit. The cowboy_req interface has largely
changed, and will change a little more. It's possible that
some examples or tests have not been converted to the new
interface yet. The documentation has not yet been updated.
All of this will be fixed in smaller subsequent commits.
Gotta start somewhere...
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Along with more cowboy_req tests.
This commit also removes cowboy_req:url/1 and cowboy_req:host_url/1
in favor of the much more powerful new set of functions.
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The new example is called file_server and it's basically
the same as web_server was. The name is clearer than the
original, all examples being "Web servers".
The new example is also tested and the test suite has
been refactored a little.
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One category of tests involving the SETTINGS ack still fails.
It is probably wise to leave these until more SETTINGS related
tests are written.
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The same edge cases that fail with other handshake methods
also fail here (mostly bad preface/timeouts stuff). In
addition, the HTTP2-Settings header contents are currently
not checked and so the related edge case tests also fail.
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Currently only testing handshake.
Tests that pass currently involve no request/response.
ALPN and prior knowledge support have some edge cases left to fix.
HTTP/1.1 Upgrade has not been implemented yet.
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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!
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Fixes #839 when 'Connection: Keep-Alive' wasn't sent in a HTTP/1.0
response. Now the usage of 'Connection' header is consistent with
current protocol version: when this header is not specified explicitly
in the response, HTTP/1.0 implies 'Connection: close' and HTTP/1.1
implies 'Connection: Keep-Alive'. So if current 'Connection' value
matches the default value of current protocol, we won't state obvious
fact in the response; and vice versa.
Amended to fix and improve tests, and revert the variable name
change from HTTP11Headers to StdHeaders. I think it's still good
to leave it as is because it's not really a standard header for
HTTP/1.0, and it's gone from HTTP/2 entirely.
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This is a large commit.
The rfc7230 test suite adds many tests from the RFC7230 document.
Gun has been updated quite a bit recently, which broke the Cowboy
suites. This is now fixed with this commit.
A new hook onfirstrequest has been added. It was very useful during
debugging of the test suites.
The initial process code has changed a little; more changes are
expected with the switch to maps for options.
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The Websocket text frames should also be less resource intensive
to validate now, with a binary concatenation avoided.
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User code may sometimes send an empty value which gets understood
by the client as being the end of the stream while this was not
intended. Ignoring empty values allow making sure the stream isn't
ended by mistake.
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Now everywhere in Cowboy when we want to stop something we return
a 'stop' tuple instead of one of the many choices depending on
context that we had before.
This particular change affects middlewares, sub protocols and
REST handlers which were using 'halt' to stop processing.
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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.
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Wasn't following the same order as the rest of the module.
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