如何将异步等待与 https 发布请求一起使用 [英] how to use async await with https post request

问题描述

我正在寻找在 https 帖子中使用异步/等待的方法.请帮帮我.我已经在下面发布了我的 https 帖子代码片段.如何使用异步等待.

I am finding way out to use async / await with https post. Please help me out. I have posted my https post code snippet below.how do I use async await with this.

const https = require('https')

const data = JSON.stringify({
  todo: 'Buy the milk'
})

const options = {
  hostname: 'flaviocopes.com',
  port: 443,
  path: '/todos',
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': data.length
  }
}

const req = https.request(options, (res) => {
  console.log(`statusCode: ${res.statusCode}`)

  res.on('data', (d) => {
    process.stdout.write(d)
  })
})

req.on('error', (error) => {
  console.error(error)
})

req.write(data)
req.end()

推荐答案

基本上，您可以编写一个返回 Promise 的函数，然后您可以使用 async/await 使用该函数.请看下图:

Basically, you can write a function which will return a Promise and then you can use async/await with that function. Please see below:

const https = require('https')

const data = JSON.stringify({
  todo: 'Buy the milk'
});

const options = {
  hostname: 'flaviocopes.com',
  port: 443,
  path: '/todos',
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': data.length
  },
};

async function doSomethingUseful() {
  // return the response
  return await doRequest(options, data);
}


/**
 * Do a request with options provided.
 *
 * @param {Object} options
 * @param {Object} data
 * @return {Promise} a promise of request
 */
function doRequest(options, data) {
  return new Promise((resolve, reject) => {
    const req = https.request(options, (res) => {
      res.setEncoding('utf8');
      let responseBody = '';

      res.on('data', (chunk) => {
        responseBody += chunk;
      });

      res.on('end', () => {
        resolve(JSON.parse(responseBody));
      });
    });

    req.on('error', (err) => {
      reject(err);
    });

    req.write(data)
    req.end();
  });
}

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