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From the RFC:
The HEAD method is identical to GET except that the server MUST NOT
return a message-body in the response. The metainformation contained
in the HTTP headers in response to a HEAD request SHOULD be identical
to the information sent in response to a GET request.
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Replaces the 'Connection' interpretation in cowboy_http_protocol
from raw value to the parsed value, looking for a single token
matching close/keep-alive instead of the whole raw value (which
could contain more than one token, for example with Firefox 6+
using websocket).
Introduce the functions cowboy_http_req:parse_header/2 and /3
to semantically parse the header values and return a proper
Erlang term.
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Use the Req connection information instead.
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And use a proper cowboy_http_req:reply/4 call for the 204 response.
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The server should not send a response if there wasn't at least
the beginning of a request sent (the Request-Line).
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Making it look more like the websocket handler error messages.
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Krishnamurthy, Kristol, Mogul: "Key Differences between HTTP/1.0
and HTTP/1.1", "Internet address conservation".
http://www8.org/w8-papers/5c-protocols/key/key.html
Fixes issue #35 reported by Alex Kropivny.
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Fixes issue #47.
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To this end we are formatting the header names just like OTP does
except we do it for names of up to 32 characters, as there are
widely used header names of more than 20 characters, the limit that
OTP follows currently. An example of such header name would be
Sec-Websocket-Version.
The formatting itself is fairly simple: an uppercase character at
the start and after dashes, everything else lowercase.
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Also sends a message 'shoot' that can be received by the protocol
to make sure Cowboy has had enough time to fully initialize the
socket. This message should be received before any socket-related
operations are performed.
WebSocket request connections are now moved from the pool 'default'
to the pool 'websocket', meaning we can have a lot of running
WebSockets despite having a low 'max_connections' setting.
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This ensures we can cleanup what we did in Handler:init/3.
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Fixes issue #31.
Recursion shouldn't happen in a single catch statement or inside
a try .. catch statement. The only safe construct for catching
exceptions and perform recursion when everything goes well is
to put the recursive call inside a try .. of .. catch construct
in the of .. catch block.
Otherwise the stack gets filled with exception-related information
since they can still be caught if we were to send them and unfold
the whole thing.
Thanks go to lpgauth for reporting the issue and people on IRC
for explaining the hows and whys.
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This is probably not perfect yet but it should be better than
nothing. We'll improve things with feedback received from the
many users.
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Following discussions on #erlounge.
Also fixes compilation in R14B03 and fixes a few underspecs
dialyzer warnings.
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Inspired by gen_server and friends. Should fix issue #13.
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The dispatcher now accepts '...' as the leading segment of Host and the
trailing segment of Path, this special atom matches any remaining path tail.
When given "cowboy.bugs.dev-extend.eu", host rule ['...', <<"dev-extend">>,
<<"eu">>] matches and fills host_info with [<<"cowboy">>, <<"bugs">>].
When given "/a/b/c/d", path rule [<<"a">>, <<"b">>, '...'] matches and fills
path_info with [<<"c">>, <<"d">>].
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Send the status line and headers using
cowboy_http_req:chunked_reply/3, and
individual chunks with cowboy_http_req:chunk/2.
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The server now does a single recv (or more, but only if needed)
which is then sent to erlang:decode_packet/3 multiple times. Since
most requests are smaller than the default MTU on many platforms,
we benefit from this greatly.
In the case of requests with a body, the server usually read at
least part of the body on the first recv. This is bufferized
properly and used when later retrieving the body.
In the case of pipelined requests, we can end up reading many
requests in a single recv, which are then handled properly using
only the buffer containing the received data.
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Returns the port given in the Host header if present,
otherwise the default port of 443 for HTTPS and 80 for HTTP
is returned.
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Defaults to 5. Prevents someone from indefinitely sending empty lines.
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The server shouldn't crash the request process when we have an error
while receiving headers. A case where this could happen is if the header
line is too long.
See also bfrog's report on ticket #3 on github.
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Fixes a bug reported by evaxsoftware on IRC.
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After much testing and experimentation of all kinds I find lists to be both
faster and using less memory than binaries for request-line and headers
handling. This is more than likely due to the fact that headers are very
short and thus do not benefit from the advantages of refc binaries, meaning
they're copied, just like lists. The memory usage discrepancy is still a
mystery for the most part, although the hoops needed to perform operations
on the binaries are probably responsible for the extra memory use.
I'm thus giving up on trying to use binaries for request-line and headers.
Instead, this commit improves performances even more to the lists code,
making lists 5% faster than binaries. Lists are easier to work with too,
so I guess it's all a big win for everyone.
Of course the request body is still read as a binary, we're using the
binary type where it performs best.
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Of course since requests are a record the response state can be explicitly
overriden, but standard use prevents errors by making sure only one reply
is sent.
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