View Source Plug.RewriteOn (Plug v1.15.1)
A plug to rewrite the request's host/port/protocol from x-forwarded-* headers.
If your Plug application is behind a proxy that handles HTTPS, you may
need to tell Plug to parse the proper protocol from the x-forwarded-*
header.
plug Plug.RewriteOn, [:x_forwarded_host, :x_forwarded_port, :x_forwarded_proto]The supported values are:
:x_forwarded_host- to override the host based on on the "x-forwarded-host" header:x_forwarded_port- to override the port based on on the "x-forwarded-port" header:x_forwarded_proto- to override the protocol based on on the "x-forwarded-proto" header
Since rewriting the scheme based on x-forwarded-* headers can open up
security vulnerabilities, only use this plug if:
- your app is behind a proxy
- your proxy strips the given
x-forwarded-*headers from all incoming requests - your proxy sets the
x-forwarded-*headers and sends it to Plug