iRule Rewrit URI

Hi Lolo,

Looking at the original URI I am going to make some assumption that you basically want to strip out the session number? Also the blabla.xxx is the some kind of file where .xxx is the extension. I am also assuming that the LTM is terminating the SSL Connection.

If that is the case the iRule would look something like the following:

 
 when HTTP_REQUEST { 
    if { [HTTP::host] eq "hostname")} { 
      HTTP::redirect "https://[HTTP::host][URI::path [HTTP::uri] 2][URI::basename [HTTP::uri]]" 
    } 
 } 
 

To break this down:

HTTP::host will contain the hostname of the URL

[HTTP::uri] = the entire URI "/(S(session number))/blabla/blabla.xxx"

[URI::path [HTTP::uri] 2] = will look at the path depth at 2. This will result in finding /blabla

[URI::basename [HTTP::uri]] = will look for the basename of the path which is "blabla.xxx"

Here is a article that talks about parsing a URI (Click here)

I hope this helps

Bhattman

 

Verry thanks for your quick response. All the best

 

 

Gotham City is save

 

 

Lolo

Post up your results when you have confirmed whether it has worked or not.

 

 

Bhattman

Another option for removing the first string between forward slashes is to use scan (Click hereüòû

  
  when HTTP_REQUEST {  
    
      Read in everything after the first / that is not a /. 
      Save that to $session_id and everything else to $uri_to_save  
     scan [HTTP::uri] {/%[^/]%s} session_id uri_to_save  
    
      Rewrite the URI without the session ID  
     HTTP::uri $uri_to_save  
  }  
  

Here is an example:

% set uri /my_session_id_string/path/to/preserve?query=string

/my_session_id_string/path/to/preserve?query=string

% scan $uri {/%[^/]%s} session_id uri_to_save

2

% puts $uri_to_save

/path/to/preserve?query=string

% puts $session_id

my_session_id_string

Aaron

It's OK and i have add filter on file extention:

 

 

when HTTP_REQUEST

 

{

 

set url [HTTP::uri]

 

if {[string tolower $url] matches_regex {/\(s\(.*\.(gif|js|css|jpg|bmp)}}

 

{

 

scan [HTTP::uri] {/%[^/]%s} session_id uri_to_save

 

Rewrite the URI without the session ID

 

log local0. "$session_id"

 

HTTP::uri $uri_to_save

 

}

 

}

 

 

Thanks all

It would be more efficient to use switch and string comparisons to check the object type versus a regex. Here is an example:

 
 when HTTP_REQUEST { 
  
     Check the requested path (URI minus query string) 
    switch -glob [string tolower [HTTP::path]] { 
       "*.gif" - 
       "*.js" - 
       "*.css" - 
       "*.jpg" - 
       "*.bmp" { 
           Read in everything after the first / that is not a /.  
   Save that to $session_id and everything else to $uri_to_save 
   scan will return the number of matches 
          if {[scan [HTTP::uri] {/%[^/]%s} session_id uri_to_save] == 2}{ 
  
              Rewrite the URI without the session ID 
             log local0. "$session_id" 
             HTTP::uri $uri_to_save 
          } 
       } 
    } 
 }  
 

Aaron

The last script work verry fine

 

 

thanks