How to Enable CORS for an AWS API Gateway Resource

0 votes

I created REST API using AWS API Gateway & AWS Lambda and when I configured CORS I faced with such issue - I was able to configure CORS response headers for OPTIONS method, but didn't for GET method.

I made it according Amazon documentation, but when I called GET method I didn't see required headers (Access-Control-Allow-Methods, Access-Control-Allow-Headers, Access-Control-Allow-Origin) in response. Due to that I got errors on client side:

Failed to load #my_test_rest#: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin #my_test_rest_url# is therefore not allowed access.

As a temporary fix I hardcode required headers in code of Lambda function, but it looks not like right solution and I'd like to understand why it don't work for me. Any ideas what's I'd doing wrong?

Jul 10, 2018 in AWS by Luke cage
• 350 points
384 views

1 answer to this question.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
0 votes

Since you're using Lambda Proxy integration for your method, you'll need to:

(1) provide the Access-Control-Allow-Origin header as part of the Lambda response. For example:

callback(null, {
    statusCode: 200,
    headers: {"Content-Type": "application/json", "Access-Control-Allow-Origin": "*"},
    body: JSON.stringify({message: "Success"})
});

(2) and add the Access-Control-Allow-Origin as a 200 response header in your Method Response config.

answered Jul 10, 2018 by Hammer
• 360 points

Related Questions In AWS

0 votes
1 answer
0 votes
1 answer

Fail to enable CORS for API Gateway functions

Firstly please select your root resource and ...READ MORE

answered Oct 9, 2018 in AWS by Priyaj
• 56,140 points
705 views
0 votes
1 answer
+1 vote
1 answer
0 votes
1 answer

Deploy Docker Containers from Docker Cloud

To solve this problem, I followed advice ...READ MORE

answered Sep 3, 2018 in AWS by Priyaj
• 56,140 points
81 views
+13 votes
2 answers
0 votes
1 answer

How do I write an S3 Object to a file?

While IOUtils.copy() and IOUtils.copyLarge() are great, I would prefer the old ...READ MORE

answered Jul 13, 2018 in AWS by Hammer
• 360 points
54 views

© 2018 Brain4ce Education Solutions Pvt. Ltd. All rights Reserved.
"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.