Question

我想使用nodejs从https服务器下载文件。我试过这个功能，但它只适用于http：

var http = require('http');
var fs = require('fs');

var download = function(url, dest, cb) {
  var file = fs.createWriteStream(dest);
  var request = http.get(url, function(response) {
    response.pipe(file);
    file.on('finish', function() {
      file.close(cb);
    });
  });
}

Answer 1

然后你应该使用https模块。引用the docs：

HTTPS是TLS / SSL上的HTTP协议。在Node中实现了这一点作为一个单独的模块。

好消息是该模块的请求相关方法（https.request()，https.get()等）支持来自http的所有选项。

Answer 2

仅使用标准节点模块：

const fs = require('fs');
const http = require('http');
const https = require('https');

/**
 * Downloads file from remote HTTP[S] host and puts its contents to the
 * specified location.
 */
async function download(url, filePath) {
  const proto = !url.charAt(4).localeCompare('s') ? https : http;

  return new Promise((resolve, reject) => {
    const file = fs.createWriteStream(filePath);
    let fileInfo = null;

    const request = proto.get(url, response => {
      if (response.statusCode !== 200) {
        reject(new Error(`Failed to get '${url}' (${response.statusCode})`));
        return;
      }

      fileInfo = {
        mime: response.headers['content-type'],
        size: parseInt(response.headers['content-length'], 10),
      };

      response.pipe(file);
    });

    // The destination stream is ended by the time it's called
    file.on('finish', () => resolve(fileInfo));

    request.on('error', err => {
      fs.unlink(filePath, () => reject(err));
    });

    file.on('error', err => {
      fs.unlink(filePath, () => reject(err));
    });

    request.end();
  });
}

Answer 3

    const request = require('request');
/* Create an empty file where we can save data */
let file = fs.createWriteStream(`file.jpg`);
/* Using Promises so that we can use the ASYNC AWAIT syntax */        
await new Promise((resolve, reject) => {
    let stream = request({
        /* Here you should specify the exact link to the file you are trying to download */
        uri: 'https://LINK_TO_THE_FILE',
        headers: {
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
            'Accept-Encoding': 'gzip, deflate, br',
            'Accept-Language': 'en-US,en;q=0.9,fr;q=0.8,ro;q=0.7,ru;q=0.6,la;q=0.5,pt;q=0.4,de;q=0.3',
            'Cache-Control': 'max-age=0',
            'Connection': 'keep-alive',
            'Upgrade-Insecure-Requests': '1',
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36'
        },
        /* GZIP true for most of the websites now, disable it if you don't need it */
        gzip: true
    })
    .pipe(file)
    .on('finish', () => {
        console.log(`The file is finished downloading.`);
        resolve();
    })
    .on('error', (error) => {
        reject(error);
    })
})
.catch(error => {
    console.log(`Something happened: ${error}`);
});

如何使用HTTPS下载Node.js文件？

3 个答案: