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bobinabottle
Asked: 2009-11-25 10:57:20 +0800 CST

relative html links for port numbers?

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I have a unique situation I think, google isn't telling me much.

I want to have a way to have a hyperlink in html to simply go to: http://:8081 http://:8080

When the page itself is running on port 80.

This would usually be easy, however this is being developed as a virtual appliance to run offline on our sales teams machines, and as such the IP address will always be different dependant on the machine its running on. I also cannot use DNS for this.

Afaik, it is impossible to have a relative hyperlink to link to another port. I then thought I could perhaps just link to "./site1" and "./site2" and then use mod_rewrite to write those links to the right port.

Does anyone know how to do this? I went do it and got stuck when I realised I wanted to rewrite the URL to a static IP which I can't do! (apache or nginx rewrite rules, or any other solution very welcome!)

apache-2.2

2 Answers

  1. Best Answer

    Use the hostname that the page requester asked for the page as, and add the port to it. With CGI it's SERVER_NAME, but the details will be dependent on what's doing the rewriting.

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  2. Thanks for the response pjz, it turns out I was a little confused with ServerName, as I thought it was dependant on DNS.

    I did the following:

    <VirtualHost _default_:80>
        ServerName offlinewebdemo

        RewriteEngine On
        RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /site1\ HTTP/ [NC]
        RewriteRule ^.*site1$ http://%{SERVER_NAME}:8081/ [R=301,L]

        RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /site2\ HTTP/ [NC]
        RewriteRule ^.*site2$ http://%{SERVER_NAME}:8080/ [R=301,L]

    And that worked :-) I then set relative links in the html. I can now click the links correctly, without needing DNS or a static IP.

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