added a lot of auth code

auth/__init__.py

@@ -1,6 +1,44 @@
 #  Copyright (c) 2019. Tobias Kurze
+"""
+Base module for auth aspects.
+
+Also this module contains mainly code for login through HTML pages served by the backend.
+If frontend pages are build by frontend code (JS, etc.) authentication should consider using api functions.
+(For more info, see api.auth_api.py.)
+"""
+from flask import Blueprint
+from werkzeug.routing import BuildError
+
+auth_bp = Blueprint('auth', __name__, url_prefix='/auth', template_folder='templates')
+
+from backend.auth.config import AUTH_PROVIDERS, DEFAULT_PROVIDER
 from backend.auth.oidc import OIDCAuthentication
+from backend.auth.oidc_config import OIDC_PROVIDERS
 
-from backend.auth.oidc_config import PROVIDERS
+oidc_auth = OIDCAuthentication(OIDC_PROVIDERS)
 
-oidc_auth = OIDCAuthentication(PROVIDERS)
+from .basic_auth import *
+
+
+def auth_decorator(): # custom decorator
+    pass
+
+
+@auth_bp.route('/login', methods=['GET', 'POST'])
+def login():
+    try:
+        prov = AUTH_PROVIDERS[DEFAULT_PROVIDER]
+    except KeyError:
+        return "No known default provider specified!"
+    url = prov["url"]
+    try:
+        url = url_for(prov["url"], next=request.endpoint)
+    except BuildError as e:
+        pass
+        #logger.log("Can't create endpoint for '{}' (specified provider: {}).".format(e.endpoint, DEFAULT_PROVIDER))
+    return redirect(url)
+
+
+@auth_bp.route('/login_select', methods=['GET'])
+def login_select():
+    return render_template('login_select.html', providers=AUTH_PROVIDERS)