getTransactionDetailsRequest unexpected character

[pp_me]

Hi,

When using the getTransactionDetailsRequest there appears to be an unexpected character returning from the request which is causing issues trying to parse the JSON

Here is a javascript example which can re-create the problem if you fill in the 3 fields that I have removed.

var r = require('request-promise');

var f = {
  "getTransactionDetailsRequest": {
    "merchantAuthentication": {
      "name": *NAME*",
      "transactionKey": *TRANSACTION_KEY*
    },
    "transId": *TRANS_ID*
  }
};

var options = {
  url: 'https://apitest.authorize.net/xml/v1/request.api', 
  method: 'POST',
  body: f,
  json: true,
}
r(options)
.then(function(res) {
  console.log(
    'Mystery Character: Unicode', require('diff').diffChars(res, res.trim())[0].value.charCodeAt(0)
  );
})

The character that appears at the very start of the string is: http://www.fileformat.info/info/unicode/char/feff/index.htm

Do you consider this a bug?

Is this already tracked?

Thanks!

[NexusSoftware]

A byte order mark (BOM) consists of the character code U+FEFF at the beginning of a data stream, where it can be used as a signature defining the byte order and encoding form. In this case, the initial BOM is only used as a signature — an indication that an otherwise unmarked JSON response is in UTF-8. Although not necessary, it was determined that there was too high of a likelihood of breaking people's existing implementations in production, if the BOM stopped appearing.

In the next version of the API, there should not be a BOM in the wrong place.

In the mean time, if it is a problem for you, just be aware of it and parse it out.