我需要一些帮助来阻止 Node 抛出这个错误，或者至少理解为什么我似乎无法捕捉到它:

events.js:72 
    throw er; // Unhandled 'error' event 
          ^ 
Error: socket hang up 
at SecurePair.error (tls.js:999:23) 
at EncryptedStream.CryptoStream._done (tls.js:695:22) 
at CleartextStream.read [as _read] (tls.js:496:24) 
at CleartextStream.Readable.read (_stream_readable.js:320:10) 
at EncryptedStream.onCryptoStreamFinish (tls.js:301:47) 
at EncryptedStream.g (events.js:175:14) 
at EncryptedStream.EventEmitter.emit (events.js:117:20) 
at finishMaybe (_stream_writable.js:354:12) 
at endWritable (_stream_writable.js:361:3) 
at EncryptedStream.Writable.end (_stream_writable.js:339:5) 
at EncryptedStream.CryptoStream.end (tls.js:633:31) 
at Socket.onend (_stream_readable.js:483:10) 

这是导致错误的代码片段:

var req = https.request(options, function(res) { 
  res.setEncoding('utf8'); 
  var buffer = ''; 
  res.on('data', function(data) { 
    buffer += data; 
  }); 
  res.on('end', function() { 
    try { 
      var json = JSON.parse(buffer); 
    } catch (err) { 
      return callback(err); 
    } 
    callback(null, json); 
  }); 
}); 
req.on('error', function(err) { 
  callback(err); 
}); 
req.end(data); 
 
api.prototype._get = function(action, callback, args) { 
  args = _.compactObject(args); 
  var path = '/api/' + action + '/?' + querystring.stringify(args); 
  this._request('get', path, undefined, callback, args) 
} 
 
api.prototype._post = function(action, callback, args) { 
  var path = '/api/' + action + '/'; 
  args = _.compactObject(args); 
  var data = querystring.stringify(args); 
  this._request('post', path, data, callback, args); 
} 

为什么 req.on('error' 没有捕捉到这个错误？

Node 版本:0.10.21

请您参考如下方法:

您缺少响应的错误处理程序。

res.on('error', function errorHandler(err) { console.log(err); });