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support multiple values for all headers configure trust for each header separately store original values in dict in environ parametrize tests for ProxyFix and get_host rewrite docs for ProxyFix and get_host
yajo
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Feb 28, 2019
Without this patch, Odoo is compatible only with one single inverse proxy in front of it.
However, when several proxies are chained in front of it, and all of them use the [proxy protocol][1], Odoo would understand the latest one's IP is the remote IP that is originating the HTTP request.
When several proxies are chained, Werkzeug receives this HTTP header:
X-Forwarded-For: 1.2.3.4, 5.6.7.8
It means that 1.2.3.4 is the request originator, and 5.6.7.8 is the 1st proxy.
If using [Werkzeug >= 0.14.1][2], which logs the correct IP, the logs would end up with:
2019-02-14 10:15:09,042 37 INFO prod werkzeug: 5.6.7.8 - - [14/Feb/2019 10:15:09] "GET /web/login HTTP/1.1" 200 -
After this patch, if you use the proper Werkzeug version and configure Odoo with `--proxy-trusted-x-for=2`, you'd get instead:
2019-02-14 10:15:09,042 37 INFO prod werkzeug: 1.2.3.4 - - [14/Feb/2019 10:15:09] "GET /web/login HTTP/1.1" 200 -
This patch is prepared to be expanded later, when Werkzeug 0.15 is released, with the `ProxyFix` refactoring made in pallets/werkzeug#1314 available, and further options for other proxy protocol headers can be added in a similar fashion.
[1]: https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt
[2]: odoo#18052 (comment)
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num_proxiesis deprecated. For backwards compatibility with the common case,x_fordefaults to 1.werkzeug.proxy_fix.originstead of individual keys. The keys in the dict match the environ keys.ProxyFixandget_host.I want to add support for the standard
Forwardedheader.I considered refactoring the somewhat repetitious code in
__call__with a for loop, but it ended up being about as complicated and seemed harder to follow.Eventually this should be moved out of contrib into a new
werkzeug.middleware.proxy_fixmodule.