Forum Discussion

t-roy's avatar
t-roy
Icon for Nimbostratus rankNimbostratus
Nov 22, 2011

inserting X-Origin-Host heade when using catch command

iRule's purpose:

 

rewrite some URIs to /

 

rewrite some hosts to start with www

 

send some URIs to my non-default pool but putting them in a data-group like "foo" := "foopool",

 

My problem: If my last if statement matches I would like to insert an X-Origin-Host header like so:

 

 

HTTP::header insert lws X-Origin-Host "[HTTP::host]"I know how to do this if I set a variable then add once my pool is selected, but I can't figure out how to do it using catch. Any help is appreciated!

 

 

when HTTP_REQUEST {

 

if {[ class match -value [string toupper [HTTP::uri]] starts_with WWW-PREIMP.FOO.CA-URIREDIR] ne "" } {

 

HTTP::uri "/"

 

}

 

if {

 

[catch {[class match -value [string toupper [HTTP::host]] starts_with WWW-PREIMP.FOO.CA-PATHREDIR] } ]

 

} {

 

HTTP::respond 301 Location "]"

 

}

 

if {

 

[catch { pool [class match -value [string toupper [HTTP::uri]] starts_with FOO.CA-REDIR] } ]

 

} {

 

pool WWW-PREIMP.FOO.CA

 

}

 

}

 

 

Thanks!

 

Troy
application delivery
dev
devops
iRules
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Nov 23, 2011
    Hi Troy,

    So you're trying to use catch to handle errors when inserting the header? How about something like this: 

    
if {[HTTP::host] ne ""}{
   catch {HTTP::header insert lws X-Origin-Host "[HTTP::host]"}
}

    Aaron
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Nov 23, 2011
    e.g. 

    [root@ve1023:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve1023:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve1023:Active] config  b pool foopool list
pool foopool {
   members 200.200.200.102:80 {}
}
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
        if {[class match -- [string toupper [HTTP::host]] starts_with WWW-PREIMP.FOO.CA-PATHREDIR]} {
                HTTP::respond 301 Location "http://www.[HTTP::host]"

        } elseif {[class match -- [string toupper [HTTP::uri]] starts_with WWW-PREIMP.FOO.CA-URIREDIR]} {
                HTTP::uri "/"
        }

        if {[class match -- [string toupper [HTTP::uri]] starts_with FOO.CA-REDIR]} {
                catch {HTTP::header insert lws X-Origin-Host [HTTP::host]}
                catch {pool [class match -value [string toupper [HTTP::uri]] starts_with FOO.CA-REDIR]}
        }
}
}
[root@ve1023:Active] config  b class WWW-PREIMP.FOO.CA-PATHREDIR list
class WWW-PREIMP.FOO.CA-PATHREDIR {
   "ABC.COM"
}
[root@ve1023:Active] config  b class WWW-PREIMP.FOO.CA-URIREDIR list
bclass WWW-PREIMP.FOO.CA-URIREDIR {
   "/TEST"
}
[root@ve1023:Active] config  b class FOO.CA-REDIR list
class FOO.CA-REDIR {
   "/FOO" { "foopool" }
}

1

[root@ve1023:Active] config  curl -I http://abc.com/abc
HTTP/1.0 301 Moved Permanently
Location: http://www.abc.com
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

2

[root@ve1023:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.253(45755) <-> 172.28.19.79(80)
1322048483.6894 (0.0031)  C>S
---------------------------------------------------------------
HEAD /test/abc HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8r zlib/1.2.3 libidn/0.6.5
Host: www.abc.com
Accept: */*
---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(45755) <-> 200.200.200.101(80)
1322048483.6904 (0.0009)  C>S
---------------------------------------------------------------
HEAD / HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8r zlib/1.2.3 libidn/0.6.5
Host: www.abc.com
Accept: */*
---------------------------------------------------------------

3

[root@ve1023:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.253(47562) <-> 172.28.19.79(80)
1322048588.1531 (0.0019)  C>S
---------------------------------------------------------------
HEAD /foo/abc HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8r zlib/1.2.3 libidn/0.6.5
Host: www.abc.com
Accept: */*
---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(47562) <-> 200.200.200.102(80)
1322048588.1553 (0.0010)  C>S
---------------------------------------------------------------
HEAD /foo/abc HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8r zlib/1.2.3 libidn/0.6.5
Host: www.abc.com
Accept: */*
X-Origin-Host: www.abc.com
---------------------------------------------------------------
  • t-roy's avatar
    t-roy
    Icon for Nimbostratus rankNimbostratus
    Nov 23, 2011
    awesome!!! nitass your solution is exactly what I had in mind. Going to test in my lab but I think that should work perfectly.

     

    thanks guys!!!