An error message is getting appended to the response in the EM-2.3.3-beta

[anshul_]

{"message":"Cannot read property 'length' of null"} is getting appended to the response of our API responses when we use 2.3.3-beta.

Following is the sample repsonse:
{ "args": {}, "headers": { "Accept": "*/*", "Accept-Encoding": "gzip, deflate, sdch", "Accept-Language": "en-US,en;q=0.8,mi;q=0.6", "Authorization": "*******", "Cache-Control": "no-cache", "Host": "httpbin.org", "Postman-Token": "25d77b10-2fe9-539f-926c-c71e6c35f568", "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/36", "X-Authorization-Claims": "******", "X-Requested-With": "Apigee Edgemicro" }, "origin": "x.x.x.x", "url": "http://httpbin.org/get" } {"message":"Cannot read property 'length' of null"}

Our APIs used to respond properly with the prior versions of Edge Microgateway.

[anshul_]

I am getting this error because of the custom plugin that we are using :

'use strict';


module.exports.init = function(config, logger, stats) {
  return {
    onend_response: function(req, res, data, next) {
      req.url = '*****';
      // oauth
      if (req.token) {
        req.token.access_token = '*****';
      }
      next(null, null);
    }
  };
}

If change the next(null, null) to next(null, res) it works fine. is it the expected behaviour ?

[mdobsonapigee2]

Definitely not. I'll look into this issue.

[mdobsonapigee2]

I've replicated the issue, and have a candidate fix. For now I'd recommend passing the data parameter as the second argument to the callback.

[mdobsonapigee2]

You can monitor the progress of the change here: https://github.com/apigee/microgateway-core/pull/55

[anshul_]

Thanks you Matthew 🙂