Fix QGIS Server service URL calculation when X-Forwarded-Proto header has multiple values

[jgrocha]

Description

This PR does 3 different (little) things. For each feature, there is only one piece of code changed. Comments are welcome regarding each feature.

There are 3 more formatting changes in this PR. They were produced by scripts/astyle.sh.

I was still using scripts/astyle.sh on files outside src/core. So sorry! I've updated the PR using clang-format for files under src/server.

1. Fix #64940

Support for protocol list in X-Forwarded-Proto header. Now it is possible to receive a X-Forwarded-Proto header like: X-Forwarded-Proto: https, https, HTTPS.

2. Read QGIS_SERVER_SERVICE_URL environment variable in every request

Only the QGIS_PROJECT_FILE file is read on every request. This variable can be set in a rewrite rule, for example, for every request. Other environment variables are read only when the server starts.

This PR also reads QGIS_SERVER_SERVICE_URL environment variable in every request, giving more flexibility to set it, when headers are not enough. This PR was motivated by this limitation: when the service URL is not being properly computed, we must provide a way to force it.

For example, with this PR we can define something like this on Apache (example with mod_rewrite):

RewriteRule ^/postgresql/(.*)/(.*)/(.*)/cgi-bin/qgis_mapserv.fcgi /cgi-bin/qgis_mapserv.fcgi [NC,PT,E=QGIS_SERVER_SERVICE_URL:https://%{HTTP_HOST}/postgresql/$1/$2/$3/cgi-bin/qgis_mapserv.fcgi,E=QGIS_PROJECT_FILE:postgresql:?service=$1&sslmode=disable&schema=$2&project=$3]

This rewrite rule defines two environment variables on every request:

• QGIS_SERVER_SERVICE_URL
• QGIS_PROJECT_FILE

For a request like this: https://osgeo.local/postgresql/5363_carttop1_coimbra_20250401/public/testewfs/cgi-bin/qgis_mapserv.fcgi, the variables will be defined as:

• QGIS_SERVER_SERVICE_URL: https://osgeo.local/postgresql/5363_carttop1_coimbra_20250401/public/testewfs/cgi-bin/qgis_mapserv.fcgi
• QGIS_PROJECT_FILE: postgresql:?service=5363_carttop1_coimbra_20250401&sslmode=disable&schema=public&project=testewfs

If we change the project being served, both QGIS_SERVER_SERVICE_URL and QGIS_PROJECT_FILE are set automatically.

3. Log headers

Before this PR, headers could be logged only on a debug version. On a quality/production environment, it is not easy to compile and run a debug version to check the atual headers received.

This PR removes the header logging on debug versions and make it happen on release versions, depending on QGIS_SERVER_LOG_LEVEL variable.

[github-actions]

🪟 Windows Qt6 builds

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(Built from commit a0f0681)

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This app is not notarized, run sudo xattr -d com.apple.quarantine /Applications/QGIS*.app to avoid the warning
(Built from commit a0f0681)

[github-actions]

The QGIS project highly values your contribution and would love to see this work merged! Unfortunately this PR has not had any activity in the last 14 days and is being automatically marked as "stale". If you think this pull request should be merged, please check

• that all unit tests are passing

• that all comments by reviewers have been addressed

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  In case you should have any uncertainty, please leave a comment and we will be happy to help you proceed with this pull request.
  If there is no further activity on this pull request, it will be closed in a week.

[github-actions]

The QGIS project highly values your contribution and would love to see this work merged! Unfortunately this PR has not had any activity in the last 14 days and is being automatically marked as "stale". If you think this pull request should be merged, please check

• that all unit tests are passing

• that all comments by reviewers have been addressed

• that there is enough information for reviewers, in particular

  • link to any issues which this pull request fixes

  • add a description of workflows which this pull request fixes

  • add screenshots if applicable

• that you have written unit tests where possible
  In case you should have any uncertainty, please leave a comment and we will be happy to help you proceed with this pull request.
  If there is no further activity on this pull request, it will be closed in a week.

[github-actions]

While we hate to see this happen, this PR has been automatically closed because it has not had any activity in the last 21 days. If this pull request should be reconsidered, please follow the guidelines in the previous comment and reopen this pull request. Or, if you have any further questions, just ask! We love to help, and if there's anything the QGIS project can do to help push this PR forward please let us know how we can assist.