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Also changes the behavior to disable buffering by default, so
that the default works in all cases, including server-sent events.
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It is now possible to stream one or more sendfile tuples.
A simple example of what can now be done would be for
example to build a tar file on the fly using the sendfile
syscall for sending the files, or to support Range requests
with more than one range with the sendfile syscall.
When using cowboy_compress_h unfortunately we have to read
the file in order to send it. More options will be added
at a later time to make sure users don't read too much
into memory. This is a new feature however so existing
code is not affected.
Also rework cowboy_http's data sending to be flatter.
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Currently the compression threshold is set to 300 and hardcoded in the
codebase. There are cases where it make sense to allow this to be
configured, for instance when you want to enforce all responses to be
compressed regarldess of their size.
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Depend on Ranch master for now since it isn't in any release yet.
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The new module is a merge of the Cowboy and Gun HTTP/2
state machines. Using a common code will help future
developments rather than duplicating the work.
A notable change is in how streams are terminated
when the handler stops before the body is sent. The
cowboy_stream:terminate function is now called only
after the body has been sent fully (or the stream
is reset in-between), not when the stop command is
returned. This will most likely have an impact on
metrics but will be closer to reality.
I had to comment a broken test in rfc7231_SUITE that
was cheating, cheating is no longer possible.
This depends on Cowlib master for the time being. A
new Cowlib version will be released once both Cowboy
and Gun are ported to use cow_http2_machine and I'm
satisfied with it.
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when settings_timeout is infinity
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This commit reworks the logging that Cowboy does via
error_logger to make the module that will do the actual
logging configurable.
The logger module interface must be the same as logger
and lager: a separate function per log level with the
same log levels they support.
The default behavior remains to call error_logger,
although some messages were downgraded to warnings
instead of errors. Since error_logger only supports
three different log levels, some messages may get
downgraded/upgraded depending on what the original
log level was to make them compatible with error_logger.
The {log, Level, Format, Args} command was also
added to stream handlers. Stream handlers should
use this command to log messages because it allows
writing a stream handler to intercept some of those
messages and extract information or block them as
necessary.
The logger option only applies to Cowboy itself,
not to the messages Ranch logs, so more work remains
to be done in that area.
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This fixes curl when fetching resources that use push.
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Depend on Cowlib master for the moment.
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This is a first step toward properly supporting request trailers.
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Using the current draft:
https://tools.ietf.org/html/draft-ietf-httpbis-h2-websockets-01
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Currently cowboy assumes that idle_timeout or request_timeout is
a number and always starts timers. Similar situation takes place
in case of preface_timeout for http2. This commit adds case for
handling infinity as a timeout, allowing to not start mentioned
timers.
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Send errors produce annoying logs and we notice the connection
is gone later on anyway.
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It's safer than allow it with the wrong behavior.
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In some cases there could be a body sent as a response to
a HEAD request when using HTTP/2. This has been corrected.
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Cowboy takes a few shortcuts to avoid wasting resources when
there is a protocol error. The RFC wants us to send a different
error depending on the state of the stream at the time of the
error, and for us to maintain the connection in cases where we
would have to spend valuable resources to decode headers. In
all these cases Cowboy will simply close the connection with
an appropriate error.
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