Proxying requests in Node

Question

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 d…

Accepted Answer

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.

Proxying requests in Node

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