TYPO3 Core

Atlan,

The canonical link is created like all other links, so I guess all links have a trailing slash in your situation? Can you give me some more background information of your case?

I can confirm the issue.

v9 /en/
<link rel="canonical" href="https://typo3-9.ddev.site/en/&quot;/>

v9 /en
<link rel="canonical" href="https://typo3-9.ddev.site/en/&quot;/> => which resolves to a 307 to https://typo3-9.ddev.site/en

v10 (current master) /en/
<link rel="canonical" href="https://typo3-master.ddev.site/en/&quot;/>

v10 (current master) /en
<link rel="canonical" href="https://typo3-master.ddev.site/en/&quot;/> => which resolves to a 307 to https://typo3-master.ddev.site/en

Especially for the canonicals this 307 redirect is very unfortunate.

1. This problem is within the url generation of TYPO3 and not only related to the canonical.
2. This problem is not related to a special TYPO3 or PHP Version.
3. This problem is only related to the "homepage" of a site, but not to subpages.

Suggestions
https://example.org/ <— (root resource, ending with slash)
https://example.org/en/whatever <— correct
https://example.org/en/whatever/ <— not correct

Domain | Site Language Base | Slug
https://example.org | /en | / —> https://example.org/en
https://example.org | /en/ | / —> https://example.org/en
https://example.org | / | / —> https://example.org/

https://example.org | /en | /subpage —> https://example.org/en/subpage
https://example.org | /en/ | /subpage —> https://example.org/en/subpage
https://example.org | / | /subpage —> https://example.org/subpage

https://example.org | /en | /subpage/ —> https://example.org/en/subpage
https://example.org | /en/ | /subpage/ —> https://example.org/en/subpage
https://example.org | / | /subpage/ —> https://example.org/subpage

Enforced Trailing Slash for all urls via custom RouteEnhancer only
Trailing slash without enforcement should redirect via 307 to no trailing slash