[fix] use X-Forwarded-Proto header if the URL scheme is unknown #5106
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The HTTP X-Forwarded-Proto (XFP) request header is a de-facto standard header for identifying the protocol (HTTP or HTTPS) that a client used to connect to a proxy or load balancer.[1] In our documentation[2] we recommend to set the `X-Scheme` header. This header is not required if the `server.base_url` is set correctly.[3] If none of these URL scheme details exist, then the header X-Forwarded-Proto is evaluated as a third alternative. [1] https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Proto [2] https://docs.searxng.org/admin/installation-apache.html#apache-s-searxng-site [3] https://docs.searxng.org/admin/settings/settings_server.html Closes: searxng#5105
inetol
approved these changes
Aug 10, 2025
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The HTTP X-Forwarded-Proto (XFP) request header is a de-facto standard header for identifying the protocol (HTTP or HTTPS) that a client used to connect to a proxy or load balancer.[1]
In our documentation[2] we recommend to set the
X-Schemeheader. This header is not required if theserver.base_urlis set correctly.[3]If none of these URL scheme details exist, then the header X-Forwarded-Proto is evaluated as a third alternative.
[1] https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Proto
[2] https://docs.searxng.org/admin/installation-apache.html#apache-s-searxng-site
[3] https://docs.searxng.org/admin/settings/settings_server.html
Closes: #5105