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If session_accept_fd() fails for a raw HTTP socket, we try to send an HTTP error 500. But, we must also take care it is an HTTP/1 connection. We cannot rely on the mux at this stage, because the error, if any, happens before or during its creation. So, instead, we check if the mux_proto is specified or not. Indeed, the mux h1 cannot be forced on the bind line and there is no ALPN to choose another mux on a raw socket. So if there is no mux_proto defined for a raw HTTP socket, we are sure to have an HTTP/1 connection. This patch must be backported to 2.0 and 1.9.
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)