JavaScript Enable CORS from a Node.JS Callback Function enable cors from localhost,enable cors from client side,enable

This client code ended up working:

exports.handler = function(context, event, callback) {
  const client = context.getTwilioClient();
  const ClientCapability = require('twilio').jwt.ClientCapability;
  const response = new Twilio.Response();
  response.appendHeader('Access-Control-Allow-Origin', '*');
  response.appendHeader('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
  response.appendHeader('Access-Control-Allow-Headers', 'Content-Type');
  response.appendHeader('Content-Type', 'application/json');
  let identity = "sampleIdentity";
  const capability = new ClientCapability({
    accountSid: context.ACCOUNT_SID,
    authToken: context.AUTH_TOKEN
  });
  capability.addScope(new ClientCapability.IncomingClientScope(identity));
  capability.addScope(new ClientCapability.OutgoingClientScope({
    applicationSid: context.TWILIO_TWIML_APP_SID
  }));
  response.setBody({identity: identity, token: capability.toJwt()})
  console.log(capability.toJwt());
  callback(null, response);
};
Answer:1

Twilio developer evangelist here.

I'm glad to see that K. Rhoda sorted out the issue. I just wanted to make obvious what made it work.

There is a custom response you can access from Twilio.Response within the Function. The response is initialized like:

const response = new Twilio.Response();

and then has the following useful methods:

// set the body of the response
response.setBody(body);

// set a header for the response
response.appendHeader(key, value);

// set all the headers for the response
response.setHeaders(obj);

// set the status code for the response
response.setStatusCode(200);

You can then send that response using the callback function, like so:

callback(null, response);
Answer:2

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