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This should limit the amount of memory that Cowboy is using
when a handler is sending data much faster than the network.
The new max_stream_buffer_size is a soft limit and only has
an effect when the cowboy_stream_h handler is used.
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As a result we explictly reject path_info components that include
a forward slash, backward slash or NUL character. This only applies
to the [...] part of the path for dir/priv_dir configuration.
Also improve the tests so that they work on Windows.
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For long-running connections it was possible for the connection
window to become larger than allowed by the protocol because the
window increases claimed by stream handlers were never reclaimed
even if no data was consumed.
The new code applies heuristics to fix this and reduce the number
of WINDOW_UPDATE frames that are sent. It includes six new options
to control that behavior: margin, max and threshold for both the
connection and stream windows. The margin is some extra space
added on top of the requested read size. The max is the maximum
window size at any given time. The threshold is a minimum window
size that must be reached before we even consider sending more
WINDOW_UPDATE frames. We also avoid sending WINDOW_UPDATE frames
when there is already enough space in the window, or when the
read size is 0.
Cowlib is set to master until a new tag is done.
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If we bind too late there might be an exception triggered
in the terminate function and we will not get the correct
stacktrace as a result.
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A bug was fixed in cowboy_rest where when content_types_provided
returned a media type with a wildcard as first in the list, and
a request comes in without an accept header, then the media_type
value in the Req object would contain '*' instead of [] for the
parameters.
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It allows disabling the chunked transfer-encoding. It
can also be disabled on a per-request basis, although
it will be ignored for responses that are not streamed.
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It allows overriding the idle_timeout option only for now.
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This allows requests that expect to run longer to do so
without impacting the configuration of other requests.
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The first two options to benefit from this are the
cowboy_compress_h options.
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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's OK to send it when set explicitly, as it can be set
to what the representation's size would have been.
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It allows to temporarily disable Websocket compression
when it was negotiated. It's ignored otherwise. This
can be used as fine-grained control when some frames
do not compress well.
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They allow the server to configure what it is willing to accept
for both the negotiated configuration (takeover and window bits)
and the other zlib options (level, mem_level and strategy).
This can be used to reduce the memory and/or CPU footprint of
the compressed data, which comes with a cost in compression ratio.
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And fix this case when multiple ranges are requested.
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Returning the atom auto instead of a callback informs Cowboy
that it needs to handle range requests automatically. This
changes the behavior so that the ProvideCallback function
is called and then Cowboy splits the data on its own and
sends the response without any other user involvement other
than defining the ranges_provided/2 callback.
This is a quick and dirty way to add range request support
to resources, and will be good enough for many cases including
for cowboy_static as it also works when the normal response
body is a sendfile tuple.
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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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This is currently undocumented but is planned to be documented
in the next version.
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This requirement was removed in RFC7231 and the rationale
behind it was documented in RFC6657.
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Fix cases where the q-value is 0 and where a wildcard
was sent in the accept-charset header.
Also don't send a charset in the content-type of the
response if the media type is not text.
Thanks to Philip Witty for help figuring this out.
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Thanks to Philip Witty for help figuring this out.
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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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