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(Rebased) Pr/behind proxy middleware #1660

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@xsawyerx xsawyerx commented Mar 31, 2022

This is a rebased branch of #590. :)

It's only for review against the original PR. Please do not merge it.

Uses existing plack middlewares (ReverseProxy and ReverseProxyPath) to
handle all request header modification when operating behing a proxy. Allows
for variants (eg HTTP_X_FORWARDED_PROTOCOL) supported by Dancer(2) but not
from those existing ReverseProxy middleware.

Special cases REQUEST_BASE header to work with ReverseProxyPath so proxies
from/to non-root paths "just work"(tm). (Alternate to #571.)

As a middleware, devs get more flexability as to where to apply it; they can
use Plack::Builder to wrap this around their app as well as further path/header
altering middleware. This could be released as a seperate package; its not
Dancer2 specific.
  set behind_proxy => 1;

We now 'use' the middleware directly rather than letting Plack::Builder
load it for us. May allow earlier version of Plack to be used as a dependency.
@xsawyerx xsawyerx changed the title Pr/behind proxy middleware rebased (Rebased) Pr/behind proxy middleware Apr 1, 2022
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I really like how this came together. We removed a test in t/request.t and we don't have any tests for lib/Dancer2/Middleware/BehindProxy.pm. Asking here so we can capture this for our future selves: do we not need to test this going forward because of the changes, or should we re-implement the test we removed in another fashion? That's about my only concern moving forward with this.

@@ -0,0 +1,81 @@
use strict;
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I'm not sure this test file is supposed to be part of this PR. It's causing the Appveyor tests to fail.

@xsawyerx xsawyerx force-pushed the pr/behind_proxy_middleware-rebased branch from 9d4d838 to 2faca00 Compare April 1, 2022 17:08
@@ -0,0 +1,58 @@
package Dancer2::Middleware::BehindProxy;
# ABSTRACT: Support Dancer2 apps when operating behing a reverse proxy
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Typo: behind

@veryrusty
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I still think this is a better way to handle the psgi env munging needed (compared with including it as part of our Request class).

It's taken some time, but I concur with the comments on the original PR about the namespace; something like Plack::Middleware::Dancer2BehindProxy would be better (and hidden from pause?)

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3 participants