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mikand_61525's avatar
mikand_61525
Icon for Nimbostratus rankNimbostratus
Feb 17, 2012

Replace (and remove) characters from URIs?

Im trying to setup an irule that will convert "\" into "/" and also remove redundant "/" (turning "//" into "/") for HTTP::uri.

 

 

What is the recommended way (performance wise) to do these two things in v10 and v11 nowadays?

 

 

I also wonder how I can efficiently search for a group of specific hexvalues?

 

 

I understand one can use:

 

 

if { [string match {*abc*} $uri] }

 

 

to search for "abc" withing a string but im not sure that the following will work:

 

 

if { [string match {\x00 || \x01} $uri }

 

 

or am I supposed to to make a large if-statement out of this or can datagroup list be used aswell?

 

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  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Feb 17, 2012
    in case not using data group.

    e.g. 

    [root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   set uri [HTTP::uri]
   set cvt_back_slash [string map {\\ /} $uri]
   set rm_double_slash [string map {// /} $cvt_back_slash]

   log local0. "$uri -> $rm_double_slash"
}
}

[root@ve1023:Active] config  cat /var/log/ltm
Feb 17 03:30:43 local/tmm info tmm[4822]: Rule myrule : /test1\/test2/test3//test4 -> /test1/test2/test3/test4
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Feb 17, 2012
    data group.

    e.g. 

    [root@ve1023:Active] config  b class convert_list list
class convert_list {
   {
      "//" { "/" }
      "\\\\" { "/" }
   }
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   set uri [HTTP::uri]
   foreach item [class get convert_list] {
      set uri [string map $item $uri]
   }
   log local0. "[HTTP::uri] -> $uri"
}
}

[root@ve1023:Active] config  cat /var/log/ltm
Feb 17 03:55:35 local/tmm info tmm[4822]: Rule myrule : /test1\/test2/test3//test4 -> /test1/test2/test3/test4
  • mikand_61525's avatar
    mikand_61525
    Icon for Nimbostratus rankNimbostratus
    Feb 17, 2012
    Thanks! :-)

     

     

    Are there any drawbacks of using data group similar to use global variable vs local variable?