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craig_lee10_177's avatar
craig_lee10_177
Icon for Nimbostratus rankNimbostratus
Oct 02, 2012

Need a pointer

Hi I need some help with an irule that I am banging my head with. Basically I need to keep the uri intact from a client point of view and strip out the /development before it gets sent to the backend web server. Please see below which we have working

 

when HTTP_REQUEST {

 

switch -glob [HTTP::uri] {

 

/development/ibi* {

 

Remove the /development prefix from the uri

 

HTTP::uri [string map {/development ""} [HTTP::uri]]

 

use node 1.1.1.1 80

 

log local0. "Host = [HTTP::host] URI = [HTTP::uri] "

 

}

 

/development/app* {

 

Remove the /development prefix from the uri

 

HTTP::uri [string map {/development ""} [HTTP::uri]]

 

use node 2.2.2.2 80

 

log local0. "Host = [HTTP::host] URI = [HTTP::uri])"

 

}

 

/development/* {

 

Remove the /development prefix from the uri

 

HTTP::uri [string map {/development ""} [HTTP::uri]]

 

use node 3.3.3.3 80

 

log local0. "Host = [HTTP::host] URI = [HTTP::uri])"

 

}

 

default {

 

Take some default action?

 

node 172.16.204.63 80

 

}

 

}

 

}

 

The problem I have is that one of the nodes sends a 302 back in the response and the URI contains something like /online/TestLogin.aspx. How do I get it to insert the /development before it goes back to the client i.e. /development/online/TestLogin.aspx so it remains totally transparent to the user?

 

 

Many Thank Craig

 

application delivery
dev
devops
iRules

3 Replies

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  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Oct 02, 2012
    e.g. 

    [root@ve10: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@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   set host [HTTP::host]
   HTTP::uri [string map {/development ""} [HTTP::uri]]
}
when HTTP_RESPONSE {
   if {[HTTP::is_redirect]} {
      HTTP::header replace Location [string map "http://${host}/ http://${host}/development/" [HTTP::header Location]]
   }
}
}

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.251(49146) <-> 172.28.19.79(80)
1349186691.3431 (0.0009)  C>S
---------------------------------------------------------------
HEAD /development/something HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: www.abc.com

---------------------------------------------------------------

New TCP connection 2: 200.200.200.10(49146) <-> 200.200.200.101(80)
1349186691.3441 (0.0009)  C>S
---------------------------------------------------------------
HEAD /something HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: www.abc.com

---------------------------------------------------------------

1349186691.3451 (0.0009)  S>C
---------------------------------------------------------------
HTTP/1.1 302 Found
Date: Tue, 02 Oct 2012 14:21:04 GMT
Server: Apache/2.2.3 (CentOS)
Location: http://www.abc.com/online/TestLogin.aspx
Connection: close
Content-Type: text/html; charset=iso-8859-1

---------------------------------------------------------------

1349186691.3451 (0.0020)  S>C
---------------------------------------------------------------
HTTP/1.1 302 Found
Date: Tue, 02 Oct 2012 14:21:04 GMT
Server: Apache/2.2.3 (CentOS)
Location: http://www.abc.com/development/online/TestLogin.aspx
Connection: close
Content-Type: text/html; charset=iso-8859-1

---------------------------------------------------------------
  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Oct 02, 2012

    This should do it but nitass's code is way better;

     

     

     

     when HTTP_RESPONSE { if { [string tolower [HTTP::header]] values "Location" equals "/online/TestLogin.aspx" } { HTTP::header replace "Location" "/development/online/TestLogin.aspx" } }

     

  • craig_lee10_177's avatar
    craig_lee10_177
    Icon for Nimbostratus rankNimbostratus
    Oct 03, 2012
    Thanks guys just had to do a few alterations in your suggestions and got it working, thanks for pointing me in the right direction

     

     

    Craig