4b3eb0a940
It is possible that some arguments within the configuration line are not specified; that is, they are set to a blank string. For example: keyword '' arg_2 In that case the content of the args field will be like this: args[0]: 'keyword' args[1]: NULL pointer args[2]: 'arg_2' args[3 .. MAX_LINE_ARGS): NULL pointers The previous way of calculating the number of arguments (as soon as a null pointer is encountered) could not place an argument on an empty string. All of the above is essential for passing the OpenTracing context via the HTTP headers (keyword 'inject'), where one of the arguments is the context name prefix. This way we can set an empty prefix, which is very useful if we get context from some other process that can't add a prefix to that data; or we want to pass the context to some process that cannot handle the prefix of that data.
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)