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This is the reason for all previous patches. The conn-stream and the associated stream are created as later as possible. It only concerns the frontend connections. But it means the request headers, and possibly the first data block, are received and parsed before the conn-stream creation. To do so, an embryonic H1 stream, with no conn-stream, is created. The result of this "early parsing" is stored in its rx buffer, used to fill the request channel when the stream is created. During this step, some HTTP errors may be returned by the mux. It must also handle http-request/keep-alive timeouts. A significative change is about H1 to H2 upgrade. It happens very early now, and no H1 stream are created (and thus of course no conn-stream). The most important part of this patch is located to the h1_process() function. Because it must trigger the parsing when there is no H1 stream. h1_recv() function has also been simplified.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)