在 Node 中代理请求 [英] Proxying requests in Node

问题描述

我需要能够提供副本网站(到 www.google.com、www.facebook.com 等任何站点)通过我的节点服务器.我找到了这个库:

https://github.com/nodejitsu/node-http-proxy

我在代理请求时使用了以下代码:

options = {忽略路径:真，更改来源:假}var proxy = httpProxy.createProxyServer({options});router.get(function(req, res) {proxy.web(req, res, { target: req.body.url });});

但是，此配置会导致大多数站点出错.根据站点的不同，我会收到来自目标 url 的 Unknown service 错误，或者 Invalid host ......类似这些内容.但是，当我通过

changeOrigin: true

我得到了一个正常运行的代理服务，但我的用户浏览器被重定向到他们请求的实际 url，而不是我的(所以如果 req.body.url = http://www.google.com，请求将转到 http://www.google.com)

我怎样才能让它显示我的网站的网址，但这样我就可以准确地复制正在显示的内容?我需要能够向请求添加一些 JS 文件，我正在使用另一个库.

为了澄清，这里是问题的摘要:

1. 用户请求具有 url 属性的资源

2. 这个url的形式是http://www.example.com

3. 我的服务器，在 www.pv.com 上运行，需要能够引导用户到 www.pv.com/http://www.example.com

4. 同时返回的 HTTP 响应www.pv.com/http://www.example.com 是http://www.example.com.我需要能够添加我自己的此响应中也包含 Javascript/HTML 文件.

解决方案

看https://stackoverflow.com/a/32704647/1587329，唯一的区别是它使用了不同的目标参数:

<块引用>

var http = require('http');var httpProxy = require('http-proxy');var proxy = httpProxy.createProxyServer({});http.createServer(function(req, res) {proxy.web(req, res, { target: 'http://www.google.com' });}).听(3000);

这可以解释 Invalid host 错误:您需要将主机作为 target 参数传递，而不是整个 URL.因此，以下可能有效:

options = {忽略路径:真，更改来源:假}var proxy = httpProxy.createProxyServer({options});router.get(function(req, res) {var url = req.body.url;proxy.web(req, res, { target: url.protocol + '//' + url.host });});

有关 URL 对象，请参阅 NodeJS 网站.

I need to be able to offer replica sites (to www.google.com, www.facebook.com, etc. any site) through my node server. I found this library:

https://github.com/nodejitsu/node-http-proxy

And I used the following code when proxying requests:

options = {
  ignorePath: true,
  changeOrigin: false
}

var proxy = httpProxy.createProxyServer({options});

router.get(function(req, res) {
  proxy.web(req, res, { target: req.body.url });
});

However, this configuration causes an error for most sites. Depending on the site, I'll get an Unknown service error coming from the target url, or an Invalid host... something along those lines. However, when I pass

changeOrigin: true

I get a functioning proxy service, but my the user's browser gets redirected to the actual url of their request, not to mine (so if req.body.url = http://www.google.com, the request will go to http://www.google.com)

How can I make it so my site's url gets shown, but so that I can exactly copy whatever is being displayed? I need to be able to add a few JS files to the request, which I'm doing using another library.

For clarification, here is a summary of the problem:

1. The user requests a resource that has a url property

2. This url is in the form of http://www.example.com

3. My server, running on www.pv.com, need to be able to direct the user to www.pv.com/http://www.example.com

4. The HTTP response returned alongside www.pv.com/http://www.example.com is a full representation of http://www.example.com. I need to be able to add my own Javascript/HTML files in this response as well.

解决方案

Looking at https://stackoverflow.com/a/32704647/1587329, the only difference is that it uses a different target parameter:

var http = require('http');
var httpProxy = require('http-proxy');
var proxy = httpProxy.createProxyServer({});

http.createServer(function(req, res) {
    proxy.web(req, res, { target: 'http://www.google.com' });
}).listen(3000);

This would explain the Invalid host error: you need to pass a host as the target parameter, not the whole URL. Thus, the following might work:

options = {
  ignorePath: true,
  changeOrigin: false
}

var proxy = httpProxy.createProxyServer({options});

router.get(function(req, res) {
  var url = req.body.url;
  proxy.web(req, res, { target: url.protocol + '//' + url.host });
});

For the URL object, see the NodeJS website.

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