GraphQL: Improve session token error messages

src/GraphQL/ParseGraphQLSchema.js

@@ -1,13 +1,13 @@
 import Parse from 'parse/node';
 import { GraphQLSchema, GraphQLObjectType } from 'graphql';
-import { ApolloError } from 'apollo-server-core';
 import requiredParameter from '../requiredParameter';
 import * as defaultGraphQLTypes from './loaders/defaultGraphQLTypes';
 import * as parseClassTypes from './loaders/parseClassTypes';
 import * as parseClassQueries from './loaders/parseClassQueries';
 import * as parseClassMutations from './loaders/parseClassMutations';
 import * as defaultGraphQLQueries from './loaders/defaultGraphQLQueries';
 import * as defaultGraphQLMutations from './loaders/defaultGraphQLMutations';
+import { toGraphQLError } from './ParseGraphQLUtils';
 
 class ParseGraphQLSchema {
   constructor(databaseController, log) {
@@ -100,17 +100,12 @@ class ParseGraphQLSchema {
   }
 
   handleError(error) {
-    let code, message;
     if (error instanceof Parse.Error) {
       this.log.error('Parse error: ', error);
-      code = error.code;
-      message = error.message;
     } else {
       this.log.error('Uncaught internal server error.', error, error.stack);
-      code = Parse.Error.INTERNAL_SERVER_ERROR;
-      message = 'Internal server error.';
     }
-    throw new ApolloError(message, code);
+    throw toGraphQLError(error);
   }
 }
 

src/GraphQL/ParseGraphQLServer.js

@@ -9,6 +9,7 @@ import { handleParseHeaders } from '../middlewares';
 import requiredParameter from '../requiredParameter';
 import defaultLogger from '../logger';
 import { ParseGraphQLSchema } from './ParseGraphQLSchema';
+import { toGraphQLError } from './ParseGraphQLUtils';
 
 class ParseGraphQLServer {
   constructor(parseServer, config) {
@@ -55,6 +56,13 @@ class ParseGraphQLServer {
     app.use(this.config.graphQLPath, corsMiddleware());
     app.use(this.config.graphQLPath, bodyParser.json());
     app.use(this.config.graphQLPath, handleParseHeaders);
+    app.use(this.config.graphQLPath, (err, req, res, next) => {
+      if (err) {
+        res.json(toGraphQLError(err));
+      } else {
+        next();
+      }
+    });
     app.use(
       this.config.graphQLPath,
       graphqlExpress(async req => await this._getGraphQLOptions(req))

src/GraphQL/ParseGraphQLUtils.js

@@ -0,0 +1,14 @@
+import Parse from 'parse/node';
+import { ApolloError } from 'apollo-server-core';
+
+export function toGraphQLError (error) {
+  let code, message;
+  if (error instanceof Parse.Error) {
+    code = error.code;
+    message = error.message;
+  } else {
+    code = Parse.Error.INTERNAL_SERVER_ERROR;
+    message = 'Internal server error';
+  }
+  return new ApolloError(message, code);
+}