Forum Discussion

craigvphillips_'s avatar
craigvphillips_
Icon for Nimbostratus rankNimbostratus
Apr 06, 2017

Tomcat context path URL

Simpe, just want to rewrite the url from http://example.bleh.com to http://example.bleh.com/example.

I am doing the following, it simply doesn't work and i can't get any logging to output so i'm just sitting here flying blind. I've searched and searched and everybody keeps using static examples, which is a bad practice.

when RULE_INIT {
   set ::domain ".bleh.com"
}
when HTTP_REQUEST {
if { [HTTP::uri] equals "/" } {
   if { [string tolower [HTTP::host]] contains $::domain }{
      set subdomain [getfield [HTTP::host] $::domain 1]
      if { not ($subdomain == "") }{
        set context [getfield $subdomain "-" 1]
        HTTP::uri "$context"
      }
   }
 }
}
devops
iRules
  • Patrik_Jonsson's avatar
    Patrik_Jonsson
    Icon for MVP rankMVP
    Apr 06, 2017

    I might be wrong, but your first example and your rule does not seem to match?

    It has not been tested, but this rule should turn http://example.bleh.com to http://example.bleh.com/example.

    when RULE_INIT {
   set static::domain ".jbhunt.com"
}

when HTTP_REQUEST {
    if { [HTTP::uri] equals "/" } {
        if { [[HTTP::host] contains $static::domain }{

            Get the first field of the host split by "."
            set subdomain [getfield [HTTP::host] "."  1]
            Change the uri
            HTTP::uri "/$subdomain"

        }
    }
}

    Two tips:

    • Static is good practice for variables that's not going to change.
    • The host header comes in lower case, so there's no need to actually use string to lower.
    • I did not see a reason to validate "" against the subdomain variable since you are checking if the host contains ".jbhunt.com". That would would validate that there is a sub domain, right?

    /Patrik