Node.JS上的JSON.Parse不会每次都起作用

Question

Here is my code :

var req = https.request(options, (res) => {

  res.on('data', (d) => {
    var data = JSON.parse(d);

    >> REDIS ACTION <<
    }
  });
});
req.end();

I assume that the JSON may be, and is most of the time large, but i don't understand this error :

    >> JSON DATA TRUNCATED, AND THIS DON'T HAVE TO BE DISPLAYED <<

SyntaxError: Unexpected end of input
    at Object.parse (native)
    at IncomingMessage.<anonymous> (A:\p
    at emitOne (events.js:77:13)
    at IncomingMessage.emit (events.js:1
    at readableAddChunk (_stream_readabl
    at IncomingMessage.Readable.push (_s
    at HTTPParser.parserOnBody (_http_co
    at TLSSocket.socketOnData (_http_cli
    at emitOne (events.js:77:13)
    at TLSSocket.emit (events.js:169:7)

Can you explain me where is my fault and how to handle it ?

Answer 1

As cdbajorin said, i needed to compose my data, because this occurs when node try to execute a command, but all the request isnt't already received.

Here is the code who solved my issue:

var req = https.request(options, (res) => {
  var response = '';

  res.on('data', (d) => {
    response += d;
  })

  res.on('end', () => {
    var data = JSON.parse(response);

    //EVERYTHING ELSE
      });
    }
  });
});
req.end();