Forum Discussion

Piotr_Pozna_ski's avatar
Piotr_Pozna_ski
Icon for Nimbostratus rankNimbostratus
Apr 24, 2015

Best way to rewrite uri to pass path segment as part of query string?

Hello.

I need URI's matching pattern 

/prefix//
where
is of form 
[a-z]{1,}
to be passed to the internal host as 
/
with 
id
as a part of query string 
id=
.

For example:

/prefix/foo/
-> 
/?id=foo
/prefix/foo/path
-> 
/path?id=foo
/prefix/foo/path?
-> 
/path?id=foo
/prefix/foo/path?p=7
-> 
/path?p=7&id=foo

What would be the best way to achieve this?

Best regards, Piotr

application delivery
devops
iRules

2 Replies

Sort By
  • Brad_Parker's avatar
    Brad_Parker
    Icon for Cirrus rankCirrus
    Apr 24, 2015

    I haven't tested this yet, but you could try somthing like this.

    when HTTP_REQUEST {
    if {[string tolower [URI::path [HTTP::path] 2 2]] matches_regex "[a-z]{1,}"}{
        HTTP::path "/[URI::path [HTTP::path] 3]"
        if {not ([HTTP::query] equals "")}{
            HTTP::query "[HTTP::query]&id=[URI::path [HTTP::path] 2 2]"
        }
        else {
            HTTP::query "id=[URI::path [HTTP::path] 2 2]"
        }
    }
}
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Apr 24, 2015

    e.g.

     irule

[root@ve11c:Active:In Sync] config  tmsh list ltm rule qux
ltm rule qux {
    when HTTP_REQUEST {
  set uri [HTTP::uri]
  if { [scan $uri {/%*[^/]/%[^/]%s} id rest] == 2 } {
    set rest [string trimright $rest "?"]
    if { $rest contains "?" } {
      set newuri "${rest}&id=${id}"
    } else {
      set newuri "${rest}?id=${id}"
    }
    HTTP::uri $newuri
  }
}
when HTTP_REQUEST priority 1000 {
  log local0. "$uri > [HTTP::uri]"
}
}

 test

[root@ve11c:Active:In Sync] config  tail -f /var/log/ltm
Apr 24 22:50:02 ve11c info tmm1[5649]: Rule /Common/qux : /prefix/foo/ > /?id=foo
Apr 24 22:50:10 ve11c info tmm[5649]: Rule /Common/qux : /prefix/foo/path > /path?id=foo
Apr 24 22:50:16 ve11c info tmm1[5649]: Rule /Common/qux : /prefix/foo/path? > /path?id=foo
Apr 24 22:50:22 ve11c info tmm[5649]: Rule /Common/qux : /prefix/foo/path?p=7 > /path?p=7&id=foo