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"option forwarded" provides a convenient way to automatically insert rfc7239 forwarded header to requests sent to servers. On the other hand, manually crafting the header is quite complicated due to specific formatting rules that must be followed as per rfc7239. However, sometimes it may be necessary to craft the header manually, for instance if it has to be conditional or based on parameters that "option forwarded" doesn't provide. To ease this task, in this patch we implement rfc7239_nn and rfc7239_np which are respectively meant to craft nodename: nodeport values, specifically intended to manually build rfc7239 'for' and 'by' header fields while ensuring rfc7239 compliancy. Example: # build RFC-compliant 7239 header: http-request set-var-fmt(txn.forwarded) "for=\"%[ipv6(::1),rfc7239_nn]:%[str(8888),rfc7239_np]\";host=\"haproxy.org\";proto=http" # check RFC-compliancy: http-request set-var(txn.test) "var(txn.forwarded),debug(ok,stderr),rfc7239_is_valid,debug(ok,stderr)" # stderr output: # [debug] ok: type=str <for="[::1]:_8888";host="haproxy.org";proto=http> # [debug] ok: type=bool <1> See documentation for more info and examples.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
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)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.