Parsing request using iRules : trying to find the equivalent of scriptname

Hi,

The irule wiki is there to help you find example of irules.

when HTTP_REQUEST {
    if { [HTTP::path] starts_with "/art/gallery.cgi" } {
    HTTP::header insert header_1 value_1
    }
}

Hi,

Thanks. I've looked through quite a few examples... I can see the HTTP::path one and thought that might be ideal, but using the example :

http://www.TSite.com/art/gallery.cgi/mammals?animal=dog&color=black

HTTP:path would return /art/gallery.cgi/mammals most likely...

I need it to only go up to the file name... i.e. /art/gallery.cgi

The url above is really just an example by the way, but my urls are similar in that there can be a forward slash after the filename before the question mark query string comes into play.

And from there the value would get injected into the HTTP:header which I know what to do from there...

I guess I could some string manipulation, but it would be nice to avoid that if possible.

Thanks,

Toni

What was suggested above would provide the results you are looking for. Are you looking to insert a header value based on a path (e.g. /art/gallery.cgi)? The HTTP::path wiki page https://devcentral.f5.com/wiki/iRules.HTTP__path.ashx states that Returns or sets the path part of the HTTP request. The path is defined as the path and filename in a request. It does not include the query string; which was suggested above, or....are you wanting to change something else?

You can replace the operator starts_with by equals if you want only /art/gallery.cgi and not sub-directories.

Can you send examples of what you need? like:

clientside request :

GET /art/gallery.cgi/mammals?animal=dog&color=black HTTP/1.1
HOST: www.TSite.com

Serverside request :

GET /art/gallery.cgi/mammals?animal=dog&color=black HTTP/1.1
HOST: www.TSite.com
NewHeader: XXX

Hi,

Yes I've had a good look at the HTTP::path option, but the problem is that it will take say a url of

http://www.TSite.com/art/gallery.cgi/mammals?animal=dog&color=black

and make it

/art/gallery.cgi/mammals

I need to extract just up to the filename... however many directories that might be... e.g. want this

/art/gallery.cgi

So in other words what makes it tricky is that we have other stuff after the filename, but before the querystring component.

But it's looking like it isn't very easy... with the apache rewrite utility, I think this was the equivalent of asking for the scriptname.

Thanks,

Toni

you can extract filename from HTTP::path with commands:

[findstr [HTTP::path] / 0 "cgi/"]

Hi Stanislas

I guess it is more that I want to get the HTTP::path up to and including the end of the filename

i.e. for http://www.TSite.com/art/gallery.cgi/mammals?animal=dog&color=black

I want

/art/gallery.cgi

not definitely not anything further... e.g.

/art/gallery.cgi/mammals

I also would prefer not to assume what the filename ext is for the request and let the F5 functions figure that out.

Thanks,

Toni

try this (or search on the following link the best way to do what you want : https://devcentral.f5.com/articles/irules-101-14-tcl-string-commands-part-2)

[string range [HTTP::path] 0 [string last / [HTTP::path]]]

Thanks for that... I had a good look around after looking through suggestions and used that to get something that has worked for me.

Thanks,

Toni