fix(service): snyk xss warnings (#3234)

Author: olevski

.gitignore

@@ -97,3 +97,6 @@ tmp/
 
 # pytest-recording cache
 cassettes
+
+# snyk
+.dccache

renku/ui/service/entrypoint.py

@@ -117,7 +117,7 @@ def exceptions(e):
 
         # NOTE: craft user messages
         if hasattr(e, "code"):
-            code = e.code
+            code = int(e.code)
 
             # NOTE: return an http error for methods with no body allowed. This prevents undesired exceptions.
             NO_PAYLOAD_METHODS = "HEAD"

renku/ui/service/views/__init__.py

@@ -16,15 +16,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """Renku service views."""
-from flask import current_app
+from flask import jsonify
+from marshmallow import Schema
 
 from renku.ui.service.config import SVC_ERROR_GENERIC
 from renku.ui.service.serializers.rpc import JsonRPCResponse
 
 
-def result_response(serializer, data):
+def result_response(serializer: Schema, data):
     """Construct flask response."""
-    return current_app.response_class(response=serializer.dumps({"result": data}), mimetype="application/json")
+    return jsonify(serializer.dump({"result": data}))
 
 
 def error_response(serviceError):
@@ -40,4 +41,4 @@ def error_response(serviceError):
     if hasattr(serviceError, "sentry"):
         error["sentry"] = serviceError.sentry
 
-    return current_app.response_class(response=JsonRPCResponse().dumps({"error": error}), mimetype="application/json")
+    return jsonify(JsonRPCResponse().dump({"error": error}))