isAcceptableStatusCode

[FGRibreau]

// There is no good reason to send an event to Keen.IO if it's for an invalid response.
// The rule is: if the app wouldn't handle a request, the middleware shouldn't handle it either.
KeenioMiddleware.prototype.isAcceptableStatusCode = function (statusCode) {
  var whitelistCodes = [401, 402, 404],
      firstCharacter = String(statusCode).charAt(0);
  return firstCharacter !== '5' && firstCharacter !== '4' || whitelistCodes.indexOf(statusCode) !== -1;
};

... but what if the developers wants to track api errors with keenio ? (that's was what I was looking for). I think it should be configurable as well :).

workaround

var keenio = require('express-keenio');
keenio.constructor.prototype.isAcceptableStatusCode = function(){
  return true;
};

[sebinsua]

Okay.

I think I'll add a switch for this in the configuration.