NodeJS 语法错误：JSON 中位置 0 处出现意外标记

The bodyAuthorize.net 的沙箱 API 的响应是：

{
  "messages": {
    "resultCode": "Error",
    "message": [
      {
        "code": "E00012",
        "text": "You have submitted a duplicate of Subscription 5777085. A duplicate subscription will not be created."
      }
    ]
  }
}

但是当我去解析它时：

try {
   bodyObj = JSON.parse(body);
} catch (ex) {
   console.error(ex);
}

我收到此错误：

SyntaxError：JSON 中位置 0 处出现意外标记

和这个：console.log(response.headers['content-type']);

返回这个：application/json; charset=utf-8

我究竟做错了什么？我想将 JSON 解析为 JS 对象。

Actually you didn't see it, but there was a invisible unicode character, specifically the byte order mark at the beginning of the JSON.
Since the byte order mark is not a valid JSON character, JSON.parse rejected it.

To remove, use the following code.

function removeByteOrderMark(str){
    return str.replace(/^\ufeff/g,"")
}
// OR (faster),
let removeByteOrderMark = a=>a[0]=="\ufeff"?a.slice(1):a