Simple Cross-Domain Ajax Proxy
Developing a feature for one of our products we needed to do retrieve pages from other domains via XMLHttpRequests from the browser. As you already know, browsers don't let you do cross domain requests as a security measure, so you have to use a proxy on the same domain that your application is running.
There are a lot of ways of doing it, and I wanted a way where I didn't have to install additional soft and such. There are php proxies, Java proxies, etc. I didn't want to do a Perl proxy (just to not bloat the solution). There where people doing it with Apache (those ones I liked), but in an unmaintanable way (adding one configuration per domain to retrieve info from), and our application required data to be retrievable from any domain. So here is the recepie I whipped up:
<Proxy http>
Order Deny,Allow
Allow from all
</Proxy>
RewriteEngine on
RewriteRule ^/web-proxy/(.*)$ $1 [P]
Now you only have to make requests to http://webserver/web-proxy/DESIRED_URL. Please take into account that if you do not protect the web-proxy location to authorized users, you have an open proxy (don't do that).