[wp-trac] [WordPress Trac] #34800: Wordpress canonical 301 redirects go to request origin instead of site_url

[WordPress Trac]

#34800: Wordpress canonical 301 redirects go to request origin instead of site_url
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 Reporter:  sevcsik       |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Canonical     |    Version:  4.3.1
 Severity:  normal        |   Keywords:
  Focuses:                |
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 I have a problem with canonical redirect using a CDN setup.

 Let's say we have an origin server at `origin.example.com`, and the CDN at
 `www.example.com`.

 When I request `https://www.example.com/page-x`, it redirects me to
 `https://origin.example.com/page-x/` instead of
 `https://www.example.com/page-x/`, altough both `site_url` and `home_url`
 are set to `https://www.example.com`.

 I suspect that Wordpress doesn't use `site_url` when composing the
 redirect URL, it's just using the request URL with a trailing slash added
 (which is in fact `https://origin.example.com/page-x` as the CDN
 translates the request).

 The expected behaviour would be to either:
  * use the correct absolute URL in the header, like `Location: <site_url>
 + <canonical_path>`
  * use a relative URL, like `Location: <canonical_path>`

 I also checked the Redirection plugin, which returns relative URLs in the
 301 redirects, and those work fine with my setup.

 Thanks for looking into this!
 Sevcsik

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Ticket URL: <https://core.trac.wordpress.org/ticket/34800>
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