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b2bb9257d2
Introducing http_ext class for http extension related work that
doesn't fit into existing http classes.
HTTP extension "forwarded", introduced with 7239 RFC is now supported
by haproxy.
The option supports various modes from simple to complex usages involving
custom sample expressions.
Examples :
# Those servers want the ip address and protocol of the client request
# Resulting header would look like this:
# forwarded: proto=http;for=127.0.0.1
backend www_default
mode http
option forwarded
#equivalent to: option forwarded proto for
# Those servers want the requested host and hashed client ip address
# as well as client source port (you should use seed for xxh32 if ensuring
# ip privacy is a concern)
# Resulting header would look like this:
# forwarded: host="haproxy.org";for="_000000007F2F367E:60138"
backend www_host
mode http
option forwarded host for-expr src,xxh32,hex for_port
# Those servers want custom data in host, for and by parameters
# Resulting header would look like this:
# forwarded: host="host.com";by=_haproxy;for="[::1]:10"
backend www_custom
mode http
option forwarded host-expr str(host.com) by-expr str(_haproxy) for for_port-expr int(10)
# Those servers want random 'for' obfuscated identifiers for request
# tracing purposes while protecting sensitive IP information
# Resulting header would look like this:
# forwarded: for=_000000002B1F4D63
backend www_for_hide
mode http
option forwarded for-expr rand,hex
By default (no argument provided), forwarded option will try to mimic
x-forward-for common setups (source client ip address + source protocol)
The option is not available for frontends.
no option forwarded is supported.
More info about 7239 RFC here: https://www.rfc-editor.org/rfc/rfc7239.html
More info about the feature in doc/configuration.txt
This should address feature request GH #575
Depends on:
- "MINOR: http_htx: add http_append_header() to append value to header"
- "MINOR: sample: add ARGC_OPT"
- "MINOR: proxy: introduce http only options"
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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)