[Server][Ogc Api] Inconsistency regarding pattern handling for QgsServerOgcApiHandler

[dmarteau]

What is the bug or the crash?

Selection of handler (QgsServerOgcApiHandler) is done using the url path, but exraction of parameters is done using the full url.

Thas means the selection and the capture of parameters do not obey same matching rules, making hard to predict the
behavior of a selection pattern with parameters.

This lead to some unexpected behavior such as getting the hostname in patterns beginning with some capture group or even getting the query part in the captured group.

Steps to reproduce the issue

• Implement a server API where there is rule starting with a pattern like /(?P<myparam>[^/]+)/? then while the correct handler will be selected, you will get the hostname as parameter.

Example:

qgis-server_1  | 2021-10-06 19:01:38,571	DEBUG	[63]	Qgis: Server: Checking API path /tms for /(?P<tilemapid>[^/]+) 
qgis-server_1  | 2021-10-06 19:01:38,571	DEBUG	[63]	Qgis: Server: API TileMapService: found handler tilesTileMapInfo
# Here is a check of the parameter in the handler implementation
qgis-server_1  | 2021-10-06 19:01:38,572	ERROR	[63]	Qgis: tilesApi: Tile map 'localhost:19876' not found

• Implement a server API where there is a rule starting with a pattern like /(?P<myparam>[^/]+)/? then while the correct handler will be selected you will have myparam?<query param follow> if the url does not end with /

Example using the request: http://localhost:19876/tms/france_parts.json?MAP=france_parts

Pattern was: /tms/(?P<tilemapid>[^/]+)

qgis-server_1  | 2021-10-06 19:08:26,635	DEBUG	[64]	Qgis: Server: API TileMapService accepts the URL path '/tms/france_parts.json' 
qgis-server_1  | 2021-10-06 19:08:26,635	DEBUG	[64]	Qgis: Server: Checking API path /tms/france_parts.json for /tms/(?P<tilemapid>[^/]+) 
qgis-server_1  | 2021-10-06 19:08:26,635	DEBUG	[64]	Qgis: Server: API TileMapService: found handler tilesTileMapInfo
# Here is a check of the parameter in the handler implementation
qgis-server_1  | 2021-10-06 19:08:26,636	ERROR	[64]	Qgis: tilesApi: Tile map 'france_parts.json?MAP=france_parts' not found

Versions

Qgis 3.16+

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response