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maximillean_953's avatar
maximillean_953
Icon for Nimbostratus rankNimbostratus
Apr 07, 2014

Example Irule

Hi, I try to translate a content switching rule from netscaler to F5 Irule for migration which still keeps going on.

I need a rule that if first 2 path of uri /cookies/set/xyz

then rule does 302 temp redirect to www.123.com with 3rd path string pasted to Set-cookie header member as Set-Cookie:TESTROUTER=xyz; and the rest mentioned below example.

curl -I 10.35.72.172/cookies/set/xyz

HTTP/1.1 302 Temporary Redirect
Location: http://www.123.com
Set-Cookie:TESTROUTER=xyz; path=/; expires=Tue, 08 Apr 2014 12:38:25 GMT; domain=.123.com

Any idea how can i do this? I try to do couple things but did not succeed yet

application delivery
devops
iRules
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Apr 07, 2014

    Give this a try (untested):

    when HTTP_REQUEST {
  if { [string tolower [HTTP::path]] starts_with "/cookies/set/" } {
    set ckname "TESTROUTER"
    set ckvalue [getfield [HTTP::path] "/" 3]
    set cookie [format "%s=%s; path=/; domain=%s" $ckname $ckvalue ".123.com"]
    HTTP::respond 302 Location [HTTP::host] "Set-Cookie" $cookie
  }
}
  • maximillean_953's avatar
    maximillean_953
    Icon for Nimbostratus rankNimbostratus
    Apr 07, 2014

    Thanks Jason works perfectly except that cookie header doesnot have expires which includes in example i post above. How sould i change set cookie line formatting to include expires date with it?

     

  • John_Alam_45640's avatar
    John_Alam_45640
    Historic F5 Account
    Apr 07, 2014

    This is untested.

    Also see this page: https://devcentral.f5.com/wiki/iRules.HTTP__respond.ashx 
    when HTTP_REQUEST {
    if { [HTTP::uri] starts_with "/cookies/set" } {
        set fmt "%d %b %Y %H:%M:%S %Z"
        set expiry [clock format [clock seconds] -format $fmt]
        set domain ".[getfield [HTTP::host] . 2].[getfield [HTTP::host] . 3]"
        set testrouter [string trim [URI::path [HTTP::uri] 3] "/"]

        HTTP::respond 302 -version 1.1 Set-Cookie "TESTROUTER=$testrouter; path=/; expires=$expiry; domain=$domain" Location "http://www.123.com"
    }
}
  • maximillean_953's avatar
    maximillean_953
    Icon for Nimbostratus rankNimbostratus
    Apr 07, 2014

    OK I solved it with

    expires=[clock format [expr ([clock seconds]+86400)] -format "%a, %d %h %Y %T GMT" -gmt true];

    So new one is ;

    when HTTP_REQUEST {
  if { [string tolower [HTTP::path]] starts_with "/cookies/set/" } {
    set ckname "TESTROUTER"
    set ckvalue [getfield [HTTP::path] "/" 4]
    set cookie [format "%s=%s; path=/; expires=[clock format [expr ([clock seconds]+86400)] -format "%a, %d %h %Y %T GMT" -gmt true]; domain=%s" $ckname $ckvalue ".123.com"]
    HTTP::respond 302 Location [HTTP::host] "Set-Cookie" $cookie
  }
}
  • maximillean_953's avatar
    maximillean_953
    Icon for Nimbostratus rankNimbostratus
    Apr 07, 2014

    this one above is tested and works perfectly same output. As others only thing left is one respond with http 1.1 f5 respond with http 1.0 

    Netscaler One
curl -I 10.35.72.172/cookies/set/xyz                              
HTTP/1.1 302 Temporary Redirect
Location: http://www.123.com
Set-Cookie:TESTROUTER=xyz; path=/; expires=Tue, 08 Apr 2014 13:43:25 GMT; domain=.123.com

F5 One
curl -H "Host:www.123.com" -I 10.35.78.76/cookies/set/xyz

    HTTP/1.0 302 Found Location: www.gittigidiyor.com Set-Cookie: TESTROUTER=xyz; path=/; expires=Tue, 08 Apr 2014 13:43:52 GMT; domain=.123.com Server: BigIP Connection: Keep-Alive Content-Length: 0