[英]How to concurrent download files using cheerio and nodejs?
我有一个包含多个页面的网站,每个页面都列出了我要剪贴和下载的下载链接。 我有几个问题:
content-disposition
但我认为浏览器遵循重定向,并且重定向的URL在其路径中具有文件名。 我当前的代码如下所示:
var request = require('request');
var cheerio = require('cheerio');
var https = require('follow-redirects').https;
require('events').EventEmitter.prototype._maxListeners = 1000;
for(var i = 1; i <= 10000; i++) {
(function(i){
url = 'http://mywebsite.com/files?page=' + i;
request(url, gotHTML)
})(i);
}
function gotHTML(err, resp, html) {
var $ = cheerio.load(html);
$('.file-header').each(function() {
var data = $(this);
var fileLink = data.children().first().children().first().attr('href');
var fileName = fileLink.substring(10);
var downloadLink = 'https://mywebsite.com/api/download/' + fileName;
download(downloadLink, function() {
console.log('downloaded');
})
})
}
function download(url, cb) {
var request = https.get(url, function(response) {
var location = request.res.headers.location;
console.log(location);
location = location.split('/').pop();
console.log(location);
var file = fs.createWriteStream(location);
response.pipe(file);
file.on('finish', function() {
file.close(cb);
});
});
}
默认的HTTP / HTTPS代理最多仅将5个套接字( maxSockets
)用于对相同来源的请求。 因此,这可能会给您造成一些问题。
尝试更改此:
var request = https.get(url, function(response) {
对此:
var options = require('url').parse(url);
options.agent = false; // or use a custom https.Agent with a higher `maxSockets`
var request = https.get(options, function(response) {
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.