如何从 Google Cloud Functions (nodeJS) 发送 HTTP 请求 [英] How to send a HTTP request from Google Cloud Functions (nodeJS)

问题描述

这可能是一个简单的问题，但我是云功能/节点编程的新手，还没有找到合适的文档.

This is probably a simple question but I'm new to cloud functions/Node programming and haven't found the right documentation yet.

如何编写一个接收 HTTP 请求但随后将 HTTP 请求发送到不同端点的 Google 云函数?例如，我可以将 HTTP 触发器发送到我的云函数 (https://us-central1-plugin-check-xxxx.cloudfunctions.net/HelloWorldTest).在项目的后期，我将弄清楚如何实现延迟.但后来我想用一个新的 HTTP 请求响应另一个端点 (https://maker.ifttt.com/trigger/arrive/with/key/xxxx).我怎么做?

How do I write a Google cloud function that will receive a HTTP request but then send a HTTP request to a different endpoint? For example, I can send the HTTP trigger to my cloud function (https://us-central1-plugin-check-xxxx.cloudfunctions.net/HelloWorldTest). Later in the project I'll figure out how to implement a delay. But then I want to respond with a new HTTP request to a different endpoint (https://maker.ifttt.com/trigger/arrive/with/key/xxxx). How do I do that?

exports.helloWorld = function helloWorld(req, res) {
  // Example input: {"message": "Hello!"}
  if (req.body.message === undefined) {
    // This is an error case, as "message" is required.
    res.status(400).send('No message defined!');
  } else {
    // Everything is okay.
    console.log(req.body.message);
    res.status(200).send('Success: ' + req.body.message);
    // ??? send a HTTP request to IFTTT endpoint here
  }
};

推荐答案

这是我在 Chetan Kanjani 的帮助下设法获得的代码.当我向我的 Google Cloud 函数端点发送一条短信时，它会回复一条短信给 IFTTT(另一个端点).

Here is the code that I managed to get working with help from Chetan Kanjani. When I send a text message to my Google Cloud function endpoint, it replys with a text message to IFTTT (a different endpoint).

const request = require('request');

exports.helloWorld = function helloWorld(req, res) {
  // Example input: {"message": "Hello!"}
  if (req.body.message === undefined) {
    // This is an error case, as "message" is required.
    res.status(400).send('No message defined!');
  } else {
    // Everything is okay.
    console.log(req.body.message);

    request.get('https://maker.ifttt.com/trigger/arrival/with/key/xxxx', function (error, response, body) {
      console.log('error:', error); // Print the error if one occurred 
      console.log('statusCode:', response && response.statusCode); // Print the response status code if a response was received 
      console.log('body:', body); //Prints the response of the request. 
    });
    res.status(200).send("Success");
  }
};

我还必须更改 package.json 文件以包含请求包.它已经有了 sample-http 包，我添加了依赖项:

I also had to change the package.json file to include the request package. It already had the sample-http package, I added the dependencies:

{
  "name": "sample-http",
  "version": "0.0.1",
  "dependencies": {
    "request": "^2.81.0"
  }
}

我仍然不确定 console.log 函数在哪里打印信息.这可能对将来的调试有所帮助.

I'm still not sure where the console.log function prints out the information. That might be helpful for future debugging.

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