Domain masking/pointing to a directory of a web ap

Question

I built a LAMP web application that let's users create their own profile page where they can upload their resume and portfolio. The url for a person's profile will be something like

http://jobbank.com/user/johndoe

John Doe registers the domain name http://johndoefreelancer.com and he wants it to point to http://jobbank.com/user/johndoe. Anyone who visits johndoefreelancer.com should not be aware that it's driven by http://jobbank.com/user/johndoe. This means that the browser url should persistently show addresses such as:

http://johndoefreelancer.com/aboutme (really points to jobbank.com/user/johndoe/aboutme) http://johndoefreelancer.com/portfolio (really points to jobbank.com/user/johndoe/portfolio)

Additionally, clicking on any links [a href=""] should keep you at johndoefreelancer.com instead of sending you to jobbank.com.

My question is, what is the best way to achieve this?

I'm considering: 1) Give instructions to users on how to domain forward with masking

2) Instruct users to fillout the field $homeUrl in their User Profile information, which is saved to the database

3) In my PHP code, if $homeUrl exists, replace all [a href="$_SERVER['HTTP_HOST']"] with [a href="$homeUrl"]

Is this the right approach? Is there a better way?

Answer 1

The only practical way i could think of in the moment is:

1. add a field in the users Profile for a domainname

2. tell the users to let point the DNS host entry to your IP (or the main domainname of you)

3. create a virtual host which is the FIRST of alle vhosts you might have. (*)

4. in this virtual host create an index.php script which looks up the requested domainname in the user profile and display the page.

You might need to implement a switch for the urls you print on the page. eg. if you came over the special index page use / as "base href", in all other cases /user/username is "base href"

*) If apache gets a request for a name it dont know (because its no ServerName|Alias of an vhost, it uses the first Vhost as fallback.

Answer 2

An alternative approach would be to tell your users to point their domains to your IP and set them up as name-based virtual hosts. The benefits are:

1. It's much easier for the user to set up then forward with masking (the latter may not even be possible depending on registrar)
2. You don't have to deal with URL rewriting in your PHP code.

This would be easier to setup if you did not have to use /user/johndoe prefix for your URLs (which you don't really need to because you can do a domain lookup in your code to determine user id), but is possible with the prefix as well - it's just that mod_rewrite setup would have to be more involved in that case (you'll need to do it per domain).