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We don't store the start-line position anymore in the HTX message. Instead we store the first block position to analyze. For now, it is almost the same. But once all changes will be made on this part, this position will have to be used by HTX analyzers, and only in the analysis context, to know where the analyse should start. When new blocks are added in an HTX message, if the first block position is not defined, it is set. When the block pointed by it is removed, it is set to the block following it. -1 remains the value to unset the position. the first block position is unset when the HTX message is empty. It may also be unset on a non-empty message, meaning every blocks were already analyzed. From HTX analyzers point of view, this position is always set during headers analysis. When they are waiting for a request or a response, if it is unset, it means the analysis should wait. But once the analysis is started, and as long as headers are not forwarded, it points to the message start-line. As mentionned, outside the HTX analysis, no code must rely on the first block position. So multiplexers and applets must always use the head position to start a loop on an HTX message.
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 - 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)