如何从Google Cloud Functions(nodeJS)发送HTTP请求

Question

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

如何编写将收到HTTP请求但随后将HTTP请求发送到其他端点的Google云功能？例如,我可以将HTTP触发器发送到我的云功能(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.但后来我想回复一个新的HTTP请求到另一个端点(https://maker.ifttt.com/trigger/arrive/with/key/xxxx).我怎么做？

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
  }
};

Answer 1

以下是我在Chetan Kanjani的帮助下设法获得的代码.当我向我的Google Cloud功能端点发送短信时,它会向IFTTT(另一个端点)回复短信.

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:

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

我仍然不确定console.log函数在哪里打印出信息.这可能对将来的调试很有帮助.

Answer 2

使用https://www.npmjs.com/package/request模块。

var request = require('request');
request.get('https://maker.ifttt.com/trigger/arrive/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. 
});

Answer 3

请求模块使用回调。如果您想使用 JavaScript Promise，Axios 模块提供了等效的功能。

Answer 4

旧的，但我在搜索自己时遇到了这个：

具有承诺支持的请求模块是（request-promise）

Answer 5

下面的代码有效。不确定 Axios 是否是处理此类简单请求的理想模块，但 Google Cloud Function 文档使用 Axios，因此使用 Axios 似乎也是明智的。其他答案使用该request模块，但它已于 2020 年 2 月被弃用。

注意：GCF 目前不原生支持 ES6。Node 13 附带 ES6 支持。

包.json

{
  "name": "YOUR_NAME",
  "version": "0.0.1",
  "dependencies": {
    "axios": "^0.19.2"
  }
}

索引.js

/**
 * Required Modules
 */
const axios = require("axios");


/**
 * Responds to any HTTP request.
 *
 * @param {!express:Request} req HTTP request context.
 * @param {!express:Response} res HTTP response context.
 */
exports.run = async(req, res) => {
  // Set API end point.
  let apiURL = YOUR_URL;

  // Wrap API parameters in convenient object.
  let apiData = {
    PARAM_1: PARAM_DATA,
    PARAM_2: PARAM_DATA
  };

  // Invoke API.
  axios.post(apiURL,
    JSON.stringify(apiData)
  )
  .then((response) => {
    res.status(200).send(response.data);
    console.log(response);
  }, (error) => {
    res.status(500).send(response.data);
    console.log(error);
  });
};