JSON.parse 意外令牌节点

Question

Using client.on('data', function(data){}) A node socket passes in the following data:

{
 "jsonrpc": "2.0",
 "result": {
           "Name": "MyGain",
           "Controls": [
                        {
                         "Name": "gain",
                         "String": "-18.0dB",
                         "Value": -18,
                         "Position": 0.68333333
                        },
                        {
                         "Name": "mute",
                         "String": "unmuted",
                         "Value": 0,
                         "Position": 0
                        }
                       ]
            },
 "id": "upd"

}

using JSON.parse(data) results in Uncaught SyntaxError: Unexpected token in JSON at position 201

If I pass the string directly all works well.

Thanks in advance.#

EDIT1:

My Code:

this.client = new net.Socket();
this.client.setEncoding('utf8');
this.client.on('data', function(data) {
console.log('raw:' + data);
var dataj = JSON.parse(data);
// console.log(b);
if (dataj.id == "upd") {
    console.log("UPDATE MESSAGE");
} else {
    console.log('unknown:' + data);
}
// client.destroy(); // kill client after server's response
});

It works if:

this.client = new net.Socket();
this.client.setEncoding('utf8');
this.client.on('data', function(data) {
console.log('raw:' + data);
var dataj = JSON.parse({"jsonrpc":"2.0","result":{"Name":"MyGain","Controls":[{"Name":"gain","String":"-65.0dB","Value":-65.0,"Position":0.29166665},{"Name":"mute","String":"unmuted","Value":0.0,"Position":0.0}]},"id":"upd"});
// console.log(b);
if (dataj.id == "upd") {
    console.log("UPDATE MESSAGE");
} else {
    console.log('unknown:' + data);
}
// client.destroy(); // kill client after server's response
});

EDIT2:

Electron environment connected to local socket server. No control of servers output

Answer 1

use this:

this.client = new net.Socket();
this.client.setEncoding('utf8');
this.client.on('data', function(data) {
console.log('raw:' + data);
var dataj = data
// console.log(b);
if (dataj.id == "upd") {
   console.log("UPDATE MESSAGE");
 } else {
  console.log('unknown:' + data);
 }
 // client.destroy(); // kill client after server's response
});