node.js - 用bluebird实现request.postAsync promise

我正在使用bluebird promises框架发出POST请求并获取对该POST请求的响应:

var Promise = require('bluebird');
var request = Promise.promisifyAll(require('request'));

// Set the headers
    var headers = {
      'User-Agent':       'Super Agent/0.0.1',
      'Content-Type':     'application/x-www-form-urlencoded'
    }

 var options = [];
 var scores = [];

// Configure the request
options[0] = {
  url: 'https://api.havenondemand.com/1/api/sync/analyzesentiment/v1',
  method: 'POST',
  headers: headers,
  form: {'apikey': 'XXXXXXXXXXX', 'text': 'I love dogs'}
}

// Start the request
request.postAsync(options[0]).spread(function(response, body) {
  if (response.statusCode == 200) {
    var answer = JSON.parse(body);
    scores[0] = answer['aggregate']['score'];
  }
}).then(function() { console.log(scores[0]) });

这是我收到的错误消息:

Unhandled rejection TypeError: expecting an array or an iterable object but got [object Null]
    at apiRejection (/Users/vphuvan/demos/node_modules/bluebird/js/release/promise.js:10:27)
    etc.

我必须怎么做才能解决此错误消息？

注意:我当前使用的bluebird的版本是3.0.5

最佳答案

您需要在bluebird 3中设置multiArgs: true。这是bluebird 3 promisify API中的更改之一。

完整解决方案如下。

var Promise = require('bluebird');
var request = Promise.promisifyAll(require('request'), { multiArgs: true });

// Set the headers
    var headers = {
      'User-Agent':       'Super Agent/0.0.1',
      'Content-Type':     'application/x-www-form-urlencoded'
    }

 var options = [];
 var scores = [];

// Configure the request
options[0] = {
  url: 'https://api.havenondemand.com/1/api/sync/analyzesentiment/v1',
  method: 'POST',
  headers: headers,
  form: {'apikey': 'XXXXXXXXXXX', 'text': 'I love dogs'}
}

// Start the request
request.postAsync(options[0]).spread(function(response, body) {
  if (response.statusCode == 200) {
    var answer = JSON.parse(body);
    scores[0] = answer['aggregate']['score'];
  }
}).then(function() { console.log(scores[0]) });

关于node.js - 用bluebird实现request.postAsync promise ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/33565210/