如何按顺序从API处理异步的结果吗？ [英] How to sequentially handle asynchronous results from API?

问题描述

这个问题可能有点模糊，但我会尽我所能解释的。

This question might be a little vague, but I'll try my best to explain.

我试图创造一切，我可以从Twitter的API获取鸣叫的数组，但是它限制了每个请求返回200鸣叫。我如何申请到Twitter异步高达3200的最大限制返回的鸣叫？这是什么意思是，是否可以异步调用Twitter的API，但构建阵列顺序，确保鸣叫排序正确有关日期？

I'm trying to create an array of all of the tweets that I can retrieve from Twitter's API, but it limits each request to 200 returned tweets. How can I request to Twitter asynchronously up to the maximum limit of 3200 returned tweets? What do I mean is, is it possible to asynchronously call Twitter's API but build the array sequentially, making sure that the tweets are correctly sorted with regard to date?

所以，我有一个数组：

var results = [];

和我使用节点的请求模块：

and I'm using node's request module:

var request = require('request');

我现在所拥有的（为200只的限制）是

what I have right now (for just the limit of 200) is

request(options, function(err, response, body) {
    body = JSON.parse(body);
    for (var i = 0; i < body.length; i++) {
        results.push(body[i].text);
    }
    return res.json(results);
});

我已经研究过，也许用承诺的模块，但它是混乱的理解。我试图用一个while循环，但它得到复杂的，因为我无法按照服务器正在采取的路径。

I've looked into maybe using the 'promise' module, but it was confusing to understand. I tried using a while loop, but it got complicated because I couldn't follow the path that the server was taking.

让我知道，如果这没有解释的事情办好。

Let me know if this didn't explain things well.

在最后，我想结果是填充了所有请求发送的tweet的数组。

In the end, I want results to be an array populated with all of the tweets that the requests send.

推荐答案

我会建议使用请求 - 诺而不是要求。这里是我的解决方案。

I would suggest using request-promise instead of request. Here is my solution.

var rp = require('request-promise');
var tweets = [];
var promises = [];
for (var i =1; i< 10; i++){
     var promise = rp(options);
    promises.push(promise);
}
Promise.all(promises).then(function(data){
  data.forEach(function(item){
    // handle tweets here
  });
  return res.json(tweets);
});

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