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matm_58717's avatar
matm_58717
Icon for Nimbostratus rankNimbostratus
Jul 11, 2013

modify Request POST

Hello,

 

I have a web application where introduce user credential. When a client introduces your credentials, need intercept and inspect the POST, looking for the value to field "username".

 

I searched, but I don´t know if is possible to do this with iRules. ¿Have Someone an idea?

 

Thanks so much

 

 

 

application delivery
dev
devops
iRules

3 Replies

  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Jul 11, 2013
    have you checked HTTP::collect? you can collect http payload and take whatever action you want.

     

     

    HTTP::collect

     

    https://devcentral.f5.com/wiki/irules.HTTP__collect.ashx
  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Jul 11, 2013
    The username, I'm guessing, is in the POST payload. Example:

    username=foo&password=bar

    So something like this might work to extract the username from that data: 

    
when HTTP_REQUEST {
     if { [HTTP::method] equals "POST" } {
          HTTP::collect [HTTP::header Content-Length]
     }
}
when HTTP_REQUEST_DATA {
     if { [HTTP::payload] contains "username=" } {
          foreach x [split [HTTP::payload] "&"] {
               if { $x starts_with "username=" } {
                    set username [lindex [split $x "="] 1]
               }
          }
     }
}