[Koha-bugs] [Bug 33967] REMOTE_ADDR incorrect in plack.log when run behind a proxy

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33967

--- Comment #1 from David Cook <dcook at prosentient.com.au> ---
Created attachment 152227
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=152227&action=edit
Bug 33967: Fix SetEnv middleware to preserve $env integrity

This patch fixes the Koha::Middleware::SetEnv, so that it
preserves the referential integrity of the $env hash
reference as it passes through the pre-process and post-process
stages of middleware wrapped around the core Koha Plack application.

Test plan:
0a. Apply the patch
0b. vi /etc/koha/sites/kohadev/koha-conf.xml
0c. Uncomment "koha_trusted_proxies"
0d. Add "172.0.0.0/8" to the end of the "koha_trusted_proxies"
0e. koha-plack --restart kohadev
1. vi /etc/apache2/sites-enabled/kohadev.conf
2. Add the following to the OPAC virtualhost:
SetEnv OVERRIDE_SYSPREF_LibraryName "The Best, Truly the Best, Koha Library"
RequestHeader add X-Koha-SetEnv "OVERRIDE_SYSPREF_LibraryName The Best\, Truly
the Best\, Koha Library"
RequestHeader add X-Forwarded-For "192.168.100.100"
3. service apache2 restart
4. tail -f /var/log/koha/kohadev/plack.log
5. Go to http://localhost:8080/
6. Note that the plack.log lists 192.168.100.100 as the client IP address
7. Note that the title of the OPAC webpage is
"The Best, Truly the Best, Koha Library Library catalog"

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