Forum Discussion

Nimbostratus

Oct 28, 2022

Irule ending with trailing slash

I have requirement that If URL is referring to a page that does not end with a "/" then redirect to the same URL ending with a "/" but it should not include below points: 1. ignore all request with ...

security

Kevin_Stewart

Employee

Nov 02, 2022

when HTTP_REQUEST {
    if { ( [HTTP::method] ne "POST" ) and ( [HTTP::uri] ne [string tolower [HTTP::uri]] ) } {
        HTTP::redirect "https://[HTTP::host][string tolower [HTTP::uri]]"
        
    } elseif { not ( [HTTP::uri] ends_with "/" ) && \
        not ( [HTTP::method] eq "POST" ) && \
        not ( [HTTP::uri] starts_with "/Webresources.axd" ) && \
        not ( [HTTP::uri] starts_with "/EPiServer.Forms/" ) && \
        not ( [HTTP::uri] contains "?" ) && \
        not ( [HTTP::uri] contains "/api/" ) } {
            HTTP::redirect "https://[HTTP::host][HTTP::uri]/"
    } 
}

Ambk25

Nimbostratus

Nov 15, 2022

Hi Kevin,

This logic works for us and now we have tested below irule as per the requirement:

when HTTP_REQUEST {
if { ( [HTTP::method] ne "POST" ) and ( [HTTP::uri] contains "*/Webresources.axd" ) }
{
HTTP::redirect "https://[HTTP::host][HTTP::uri]]"

} elseif { not ( [HTTP::uri] ends_with "/" ) && \
not ( [HTTP::method] eq "POST" ) && \
not ( [HTTP::uri] contains "/EPiServer.Forms/" ) && \
not ( [HTTP::uri] contains "?" ) && \
not ( [HTTP::uri] contains "/api/" ) && \
not ([class match [string tolower [HTTP::path]] ends_with /DMZ/extensions])
} {
HTTP::respond 301 Location "https://[HTTP::host][string tolower [HTTP::uri]]/"
}
}

Now we have additional condition which needs to be complete: If trailing slash and upper case is present then it needs to be redirect to lower case with trailing slash

Example: www.abc.com/vgh-BT-grt/ needs to be redirect to www.abc.com/vgh-bt-grt/

Please help us to fulfil this requirement by modifying above mentioned irule.

Kevin_Stewart

Employee

Nov 15, 2022

when HTTP_REQUEST {
    if { ( [HTTP::method] ne "POST" ) and ( [HTTP::uri] contains "*/Webresources.axd" ) } {
        HTTP::redirect "https://[HTTP::host][HTTP::uri]]"
    } elseif { not ( [HTTP::uri] ends_with "/" ) && \
        not ( [HTTP::method] eq "POST" ) && \
        not ( [HTTP::uri] contains "/EPiServer.Forms/" ) && \
        not ( [HTTP::uri] contains "?" ) && \
        not ( [HTTP::uri] contains "/api/" ) && \
        not ( [class match [string tolower [HTTP::path]] ends_with /DMZ/extensions] )
    } {
        HTTP::respond 301 Location "https://[HTTP::host][string tolower [HTTP::uri]]/"
    } elseif { ( [HTTP::uri] ends_with "/" ) && ( [HTTP::uri] ne [string tolower [HTTP::uri]] ) } {
        HTTP::respond 301 Location "https://[HTTP::host][string tolower [HTTP::uri]]"
    }
}

Ambk25

Nimbostratus

Dec 06, 2022

Hi Kevin,

Thanks for your update but unfortunately it did not worked and getting multiple redirections with infinite loops to meet below condition:

"If trailing slash and upper case is present then it needs to be redirect to lower case with trailing slash"

Could you please suggest any other way by modifying previusly shared irule to meet our requirement.

Again, thank you very much for your unconditional support and prompt response.

Kevin_Stewart

Employee

Dec 07, 2022

Perhaps best thing to do now would be to inject some logging and see what's going on.

when HTTP_REQUEST {
    log local0. "============================="
    log local0. "Incoming request: [HTTP::uri]"
    if { ( [HTTP::method] ne "POST" ) and ( [HTTP::uri] contains "*/Webresources.axd" ) } {
        log local0. "-- request is POST and contains */Webresources.axd"
        HTTP::redirect "https://[HTTP::host][HTTP::uri]]"
    } elseif { not ( [HTTP::uri] ends_with "/" ) && \
        not ( [HTTP::method] eq "POST" ) && \
        not ( [HTTP::uri] contains "/EPiServer.Forms/" ) && \
        not ( [HTTP::uri] contains "?" ) && \
        not ( [HTTP::uri] contains "/api/" ) && \
        not ( [class match [string tolower [HTTP::path]] ends_with /DMZ/extensions] )
    } {
        log local0. "-- request is not POST, doesn't end with / and doesn't contain (?, /api/, /EPiServer.Forms/)"
        HTTP::respond 301 Location "https://[HTTP::host][string tolower [HTTP::uri]]/"
    } elseif { ( [HTTP::uri] ends_with "/" ) && ( [HTTP::uri] ne [string tolower [HTTP::uri]] ) } {
        log local0. "-- request ends with / and not lowercase"
        HTTP::respond 301 Location "https://[HTTP::host][string tolower [HTTP::uri]]"
    }
}

View the logs: