CODEWITHSUNDEEP
amazon-web-servicesaws-lambda
Jon Sud
Jon Sud

Reputation: 11661

The request cloud not be satisfied in rewrite at lambda@edge

I want to do rewrite in lambda@egde.

I got an error when I try to browse: https://example.com/foo

enter image description here

This is my function:

exports.handler = (event, context, callback) => {
  const request = event.Records[0].cf.request;
  
  if (/^\/foo($|\/)/.test(request.uri)) {
    request.uri = "https://api.example.com/bar";
  }
  
  callback(null, request);
};

I want to do rewrite (not redirect). What is wrong with this code?

Upvotes: 0

Views: 129

Answers (1)

Chris Williams
Chris Williams

Reputation: 35238

You're changing the URI to be an absolute path of a users request, it should just be the path part of the request.

So the below is what this should become.

exports.handler = (event, context, callback) => {
  const request = event.Records[0].cf.request;
  
  if (/^\/foo($|\/)/.test(request.uri)) {
    request.uri = "/bar";
    request.headers['host'] = [{ key: 'host', value: "api.example.com"}];
  }
  
  callback(null, request);
};

If you wanted to change the domain you would need to modify the host header.

Bare in mind with this example it will only rewrite the URI before it goes to the origin. If you want the users request to change you would need to perform a rewrite.

Upvotes: 1

Related Questions