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It is now possible to perform HTTP upgrades on a TCP stream from the frontend side. To do so, a tcp-request content rule must be defined with the switch-mode action, specifying the mode (for now, only http is supported) and optionnaly the proto (h1 or h2). This way it could be possible to set HTTP directives on a TCP frontend which will only be evaluated if an upgrade is performed. This new way to perform HTTP upgrades should replace progressively the old way, consisting to route the request to an HTTP backend. And it should be also a good start to remove all HTTP processing from tcp-request content rules. This action is terminal, it stops the ruleset evaluation. It is only available on proxy with the frontend capability. The configuration manual has been updated accordingly.
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)