How to add proxy to Node / Express site?
See node-http-proxy. It should be better than implementing your own proxy.
Express lets you add middlewares as arguments when you do
express.createServer(). Or, you can add them afterwards by using.use(proxy).I don't think so.
To give an example (untested code):
var httpProxy = require('http-proxy'), express = require('express');var yahooProxy = httpProxy.createServer(80, 'yahoo.com');var app = express.createServer();app.configure(function () { app.use('/yahoo', yahooProxy);});...
Here's another example with 1.0.X that demonstrates header injection.
var express = require( 'express' );var proxy = require( 'http-proxy' ).createProxyServer;var app = express();app.configure(function() { // Inject some request headers here before we proxy... app.use( function( req, res, next ) { req.headers[ 'x-my-header' ] = 'blah blah'; next(); }); // Proxy based on path... app.use( '/stack', proxy({ target: 'http://stackoverflow.com'} ).web ); app.use( '/yahoo', proxy({ target: 'http://yahoo.com'} ).web ); app.use( function( req, res ) { res.send({ ok: false, message: 'Not much here.' }) });}).listen( 3000 );
You can just add another route to your express app, perhaps at /api/yahoo/....
This view function will then make a call to the Yahoo API, probably using: http://nodejs.org/docs/v0.4.9/api/http.html#http.request, and then when that request finishes you simple return the result as JSON.
However, keep in mind that your proxy is public and that anyone can make requests through it. I would suggest some basic authorization. A generated value which you provide to the page making the request should work.