UriComponentsBuilder's fromHttpRequest uses server port as host port when handling the Forwarded header [SPR-15504]

[spring-projects-issues]

Gregory Vandenbroucke opened SPR-15504 and commented

The UriComponentsBuilder's adaptFromForwardedHeaders method doesn't handle the host port of the Forwarded header correctly, which means that the URI generated through the fromHttpRequest method will append the server port to the host (of the Forwarded header), instead of just using the port (if any) defined in the host part of the Forwarded header.
According to the RFC https://tools.ietf.org/html/rfc7239#section-5.3 and https://tools.ietf.org/html/rfc7230#section-5.4 the host part of the Forwarded header "provides the host and port information from the target URI", and as such should be handled in the adaptFromForwardedHeaders method.

The pull request 1413 will try to parse the port of the host of the Forwarded header, and configure the builder accordingly.

related pull request: #1413

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Issue Links:

• spring-web CORS requires X-Forwarded-Port [SPR-16262] #20809 spring-web CORS requires X-Forwarded-Port

Referenced from: pull request #1413