node.js - XMLHttpRequest，获取标题信息 [英] node.js - XMLHttpRequest, get header informations

问题描述

我想获得网站标题 http://facebook.com 。这应该是302 Moved Permanently，我想调用响应头中提供的引用链接。

I want to get the headers of the website "http://facebook.com". This should be a 302 Moved Permanently and I want to call the referred link which is provided in the response header.

这是我的代码：

var req = new XMLHttpRequest();
req.open('GET', "http://facebook.com/", false);
req.send(null);
var headers = req.getAllResponseHeaders().toLowerCase();
console.log(headers);

以下是错误消息：

/home/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:230
for (var i in response.headers) {

TypeError: Cannot read property 'headers' of undefined
    at getAllResponseHeaders (/home/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:230:27)
    at Object.<anonymous> (/home/browse/init.js:67:19)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:906:3

我希望你能帮助我。

推荐答案

以下代码应该足够，根据评论，你不需要 XHR 。

The following code should be sufficient, as per the comment, you don't need XHR.

var http = require('http');

var options = {
  hostname: 'www.google.com',
  port: 80,
  method: 'GET'
};

var req = http.request(options, function(res) {
  console.log('headers:\n' + JSON.stringify(res.headers));
  res.setEncoding('utf8');
  res.on('data', function (chunk) {
    console.log('body:\n' + chunk);
  });
});

req.on('error', function(e) {
  console.log('problem with request: ' + e.message);
});
req.end();

这篇关于node.js - XMLHttpRequest，获取标题信息的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！