Displaying custom error pages on different VirtualHosts in Apache

Question

I have a reverse proxy Apache that is moving the request to a Tomcat servlet. The configuration on the Virtual Host in Apache is:

<VirtualHost 10.10.10.10:80>
ProxyPass /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1
ProxyPassReverse /Site1/ServLet1 http://1.1.1.1//Site1/ServLet1

ProxyPass /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2
ProxyPassReverse /Site2/ServLet2 http://2.2.2.2/Site1/ServLet1
</VirtualHost>

Essentially, if it comes to 10.10.10.10 and requests /Site1/ServLet1, route it to /Site1/ServLet1.

if I add

<VirtualHost 10.10.10.10:80>
ProxyPass /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1
ProxyPassReverse /Site1/ServLet1 http://1.1.1.1//Site1/ServLet1
ErrorDocument 404 /customerrors/site1/404.html

ProxyPass /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2
ProxyPassReverse /Site2/ServLet2 http://2.2.2.2/Site1/ServLet1
</VirtualHost>

so it will show a custom error for site1 (I set the ErrorDocument), it will be served to both.

How can I have a different 404 error page per site maintaining this kind of configuration?

Thank

Edit:

if I modify the configuration based on the comments below like:

<Location /Site1/ServLet1/>
ProxyPass http://1.1.1.1/Site1/ServLet1
ProxyPassReverse http://1.1.1.1/Site1/ServLet1
ErrorDocument 404 /customerrors/site1/404.html
</Location>

Then I can still get to http://1.1.1.1/Site1/ServLet1 but no error page is displayed whatsoever

Solution 1

I'm not sure what you mean by "different VirtualHosts", since these are in the same one.. but I think you'll want to do something like this (and consider moving the ProxyPass statements into the <Location> blocks too, if you can):

<VirtualHost 10.10.10.10:80>
    ProxyPass /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1
    ProxyPassReverse /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1

    <Location /Site1>
        ErrorDocument 404 /customerrors/site1/404.html
    </Location>

    ProxyPass /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2
    ProxyPassReverse /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2

    <Location /Site2>
        ErrorDocument 404 /customerrors/site2/404.html
    </Location>
</VirtualHost>

Edit:

To have the Proxy statements reside in the location blocks:

<VirtualHost 10.10.10.10:80>
    <Location /Site1>
        ErrorDocument 404 /customerrors/site1/404.html
    </Location>
    <Location /Site1/ServLet1>
        ProxyPass http://1.1.1.1/Site1/ServLet1
        ProxyPassReverse http://1.1.1.1/Site1/ServLet1
    </Location>

    <Location /Site2>
        ErrorDocument 404 /customerrors/site2/404.html
    </Location>    
    <Location /Site2/ServLet2>
        ProxyPass http://2.2.2.2/Site2/ServLet2
        ProxyPassReverse http://2.2.2.2/Site2/ServLet2
    </Location>
</VirtualHost>

Solution 2

Make it so that each vhost has it's own VirtualHost definition.

<VirtualHost 10.10.10.10:80>
    Servername site1.tld
    ProxyPass /Site1/ServLet1 http://1.1.1.1/Site1/ServLet1
    ProxyPassReverse /Site1/ServLet1 http://1.1.1.1//Site1/ServLet1
    ErrorDocument 404 /customerrors/site2/404.html
</VirtualHost>

<VirtualHost 10.10.10.10:80>
    ServerName site2.tld
    ProxyPass /Site2/ServLet2 http://2.2.2.2/Site2/ServLet2
    ProxyPassReverse /Site2/ServLet2 http://2.2.2.2/Site1/ServLet1
    ErrorDocument 404 /customerrors/site2/404.html
</VirtualHost>

You'll also need to ensure that you have a suitable NameVirtualHost definition.

Comments

[Mr Aleph]

It doesn't work. I added <Location /Site1> and when I browse to Site2 I still see the error for Site1. Also adding ProxyPass inside the Location tags gives me an error ProxyPass|ProxyPassMatch can not have a path when defined in a location.

[Mr Aleph]

what I want to do is that if the user browses to 10.10.10.10/Site1/ServLet1 then everything is fine, if he browses to 10.10.10.10/Site1/AnyOtherPage then display error. This needs to be done per page

[Mr Aleph]

I still get ProxyPass|ProxyPassMatch can not have a path when defined in a location. I'm confused now, could write a little sample or modify the one in your answer?

[Mr Aleph]

I don't have a servername, they are all IP addresses

[Mr Aleph]

such as? Can you modify your example to show me what you mean'

[Mr Aleph]

See comments on my question. I passes the request via the reverse proxy to http://1.1.1.1/Site1/ServLet1 but it doesn't show any error page

[ravi yarlagadda]

@MrAleph Edited, try that.

[Mr Aleph]

Still. It doesn't show any error page.

[ravi yarlagadda]

@MrAleph It would mean using a different hostname for servlet; site1.example.com instead of example.com/site1/servlet1 - and I agree, that approach might simplify things future changes and maintenance.