Ensure CSRF errors handled to return unauthorized resposne.pgadmin-or…

…g#8065

web/pgadmin/__init__.py

@@ -36,6 +36,7 @@
 from werkzeug.local import LocalProxy
 from werkzeug.utils import find_modules
 from jinja2 import select_autoescape
+from flask_wtf.csrf import CSRFError
 
 from pgadmin.model import db, Role, Server, SharedServer, ServerGroup, \
     User, Keys, Version, SCHEMA_VERSION as CURRENT_SCHEMA_VERSION
@@ -45,7 +46,8 @@
 from pgadmin.utils.versioned_template_loader import VersionedTemplateLoader
 from datetime import timedelta, datetime
 from pgadmin.setup import get_version, set_version, check_db_tables
-from pgadmin.utils.ajax import internal_server_error, make_json_response
+from pgadmin.utils.ajax import internal_server_error, make_json_response, \
+    unauthorized
 from pgadmin.utils.csrf import pgCSRFProtect
 from pgadmin import authenticate
 from pgadmin.utils.security_headers import SecurityHeaders
@@ -915,13 +917,15 @@ def all_exception_handler(e):
     @app.errorhandler(HTTPException)
     def http_exception_handler(e):
         current_app.logger.error(e, exc_info=True)
-        if e.code == 400 and\
-                e.description == 'The CSRF session token is missing.':
-            error = str(e.description) + 'Please refresh the page.'
-            return internal_server_error(errormsg=gettext(error))
         return e
 
-    # Intialize the key manager
+    # Send unauthorized response if CSRF errors occurs.
+    @app.errorhandler(CSRFError)
+    def handle_csrf_error(error):
+        err_msg = str(error.description) + ' You need to refresh the page.'
+        return unauthorized(errormsg=gettext(err_msg))
+
+    # Initialize the key manager
     app.keyManager = KeyManager()
 
     ##########################################################################