Login Flow v2

[mahibi]

Implement Login Flow v2

Doc:
https://docs.nextcloud.com/server/19/developer_manual/client_apis/LoginFlow/index.html#login-flow-v2

See android files app:

• Login Flow v2 android#12922
• Remove Login Flow v1 android#14461

This will also avoid issues like #3386

The best approach would be to extract Login&Authentication Screens to https://github.com/nextcloud/android-common and use them for all Nextcloud android apps.

[mario-spitze]

We still have problems while we login by username and password. Our nextcloud server working well behind an apache reverse proxy with subdirectory. If we try to login with some apps like the talk app for iOS and android we get requests like the following at the last login-step:

xx.xx.xx.174 - - [21/Feb/2025:10:02:24 +0100] "POST /bhhcloud/login/flow HTTP/1.1" 303 1069 "-" "Volla Volla Phone 22 (Nextcloud Talk)"
xx.xx.xx.174 - - [21/Feb/2025:10:02:25 +0100] "GET /server:https://myweb.de/cloud&user:username&password:1euf6i7sWv4VFoJ2TUFsb1ITnbO99lDdxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxA16gSLLL HTTP/1.1" 404 577 "-" "Volla Volla Phone 22 (Nextcloud Talk)"

I have no idea where this request have to be redirected to by the proxy. The last try was with the android talk app 20.1.1 installed by F-Droid an Nextcloud Server 30.0.6.
Login by App-Password and QR-Code is a well known workaround but the android app can not login by QR-Code.

The login flow documentation talks about URLs like this. (https://docs.nextcloud.com/server/31/developer_manual/client_apis/LoginFlow/index.html#obtaining-the-login-credentials) Now my question is, could this problem be solved by implementing the login flow v 2? I don't now witch version is used by other working apps. If this could solve my problem it would save some off my time. Otherwise i will walk on and open a new ticket.