api: add logout route

docs/openapi.json

@@ -156,6 +156,7 @@
         "summary": "TEMPORARY displays a message about how to access a resource."
       }
     },
+    "/api/logout": {},
     "/api/me": {
       "get": {
         "description": "This resource provides basic information about an authenticated user based on the session cookie presence.",

reana_server/rest/users.py

@@ -11,9 +11,10 @@
 import logging
 import traceback
 
-from flask import Blueprint, jsonify, request
+from flask import Blueprint, jsonify, request, make_response, redirect
 from flask_login import current_user
 
+from reana_server.config import REANA_URL
 from reana_server.utils import (_create_user, _get_user_from_invenio_user,
                                 _get_users)
 
@@ -289,3 +290,13 @@ def get_me():
         )
     else:
         return jsonify({'error': 'User not logged in'}), 401
+
+
+@blueprint.route('/logout', methods=['GET'])
+def _logout():
+    if current_user.is_authenticated:
+        resp = make_response(redirect(request.args.get("next")))
+        resp.delete_cookie('session')
+        return resp
+    else:
+        return jsonify({'error': 'User not logged in'}), 401