..  include:: /Includes.rst.txt

..  _breaking-108084-1763033071:

==============================================================
Breaking: #108084 - Allow rootless paths in URI implementation
==============================================================

See :issue:`108084`

Description
===========

Previously, the TYPO3 implementation of :php-short:`\Psr\Http\Message\UriInterface`
always prefixed rootless paths (paths without a preceding slash) with a slash.
With this normalization in place, it was impossible to represent rootless
paths. This has now changed so that a slash is only prepended to the path
when an authority (host name) is present.

Example
-------

Input: `rootless/path/`

..  code-block:: php
    :caption: Examples with different URIs

     use TYPO3\CMS\Core\Http\Uri;

     $uri = new Uri('rootless/path/');
     $uriAsString = (string)$uri;
     // before: /rootless/path/
     // after: rootless/path/

     // Same behavior with authority
     $uri = (new Uri('https://example.com'))->withPath('rootless/path/');
     $uriAsString = (string)$uri;
     // before: https://example.com/rootless/path/
     // after: https://example.com/rootless/path/

     // Colon in first path segment
     $uri = new Uri('rootless:path/to/resource');
     $uriAsString = (string)$uri;
     // before: /rootless:path/to/resource/
     // after: ./rootless:path/to/resource/

Impact
======

Regarding top level TYPO3 API and functionality, nothing has changed. Required
TYPO3 code has been adapted.

Third party code that uses the :php-short:`\TYPO3\CMS\Core\Http\Uri` class
directly will get different results when representing rootless paths without
authority. Code that relied on the normalization done by TYPO3 before is
likely to break.

Since TYPO3 is always dealing with absolute paths, due to URL rewriting in the
backend and the frontend, it is unlikely that much third party code relies on
relative paths, so the impact is expected to be low.

Affected installations
======================

Third party code that is using the :php-short:`\TYPO3\CMS\Core\Http\Uri` class
directly and that is representing rootless paths without authority.

..  index:: PHP-API, NotScanned, ext:core