HTTP Respond Data replacing ?

Hi Charlie,

 

I am sorry but I don't seem to understand your question(s). Can you re-descibe what you would like to accomplish with our assistance more clearly?

 

 

CB

 

You may want to check this thread:

 

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&postid=32434&view=topic

 

 

I had to use the 1MB workaround in the HTTP_RESPONSE, but found the HTTP::version change in the HTTP_REQUEST did not work for my particular application, so just left it out.

 

 

Also, I never got the string map stuff to work so used the regsub as shown in the example. (I am still running 9.2.5 on this particular BIGIP)

 

 

Hello, chbhatt & tarsier

 

 

I'm trying to find a way with an iRule (or any functionality really) to take a url like

 

https://blo.client.com/rk

 

https://blo.client.com/rk-admin/

 

and convert it to

 

https://blo.server.com/rk/index.htm

 

https://blo.server.com/rk/login.htm

 

 

as it goes through the bigip (running v9).

 

The catch is we cannot redirect the browser client to the blo.server.com/rk/index.htm site, the end user must always see blo.client.com.

 

To make it even more complicated, sometimes the server will send back a payload with a URL inside it for the user that we need to change from blo.server.com to blo.client.com .

 

 

when HTTP_REQUEST {

 

log local0. "[IP::client_addr]:[TCP::client_port]: New request to [HTTP::host][HTTP::uri]"

 

switch "[string tolower [HTTP::host][HTTP::uri]]" {

 

"blo.client.com.ch/rk-admin/" {

 

HTTP::header replace "Host" "blo.server.com"

 

HTTP::uri "/rk/login.htm"

 

set target_pool "blo.server"

 

pool blo.server

 

log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::host] [HTTP::uri] Rewrite host/uri (1)"

 

}

 

"blo.client.com/rk/" {

 

HTTP::header replace "Host" "blo.server.com"

 

HTTP::uri "/rk/index.htm"

 

set target_pool "blo.server"

 

pool blo.server

 

log local0. "[IP::client_addr]:[TCP::client_port]: Rewrite host/uri (2)"

 

 

}

 

}

 

}

 

when HTTP_RESPONSE {

 

HTTP::collect [HTTP::header Content-Length]

 

if { $target_pool == "blo.server" } {

 

set location [HTTP::header value Location]

 

log local0.info "Server-RESPONS"

 

HTTP::header replace Location [string map -nocase {"blo.client.com" "blo.serve.com"} [HTTP::header Location]]

 

log "BEFORE Replacing payload with new data."

 

}

 

}

 

when HTTP_RESPONSE_DATA {

 

set clen [string length [HTTP::payload]]

 

regsub -all "blo.client.com" [HTTP::payload] "blo.server.com" newdata

 

log "Replacing payload with new data."

 

HTTP::payload replace 0 $clen $newdata

 

HTTP::release

 

}

 

 

 

if is the backend server http (cleartext) this irull is running well, but when I try to change httpS- httpS respond HTTP_response_data it does not function.

 

Is there a way to do this?

 

 

Thanks for any help.

 

 

It would be more efficient to use a stream profile and iRule to rewrite the response content compared with collecting the response payload. Here is a generic (untested) example. You could add your request URI rewriting logic to it.

Aaron

 
  LTM configuration object requirements: 
  
  - The virtual server must have an HTTP profile configured 
  - The virtual server must have a blank STREAM profile configured 
  - The virtual server must have a default pool configured 
  
  iRule configuration requirements: 
  
  - Debug can be enabled/disabled in the RULE_INIT event by setting ::rewrite_debug to 1 or 0 respectively. 
  - Outside the RULE_INIT section, no other changes should need to be made. 
  
 when RULE_INIT { 
  
     Log debug messages to /var/log/ltm? 1=yes, 0=no 
    set ::rewrite_debug 1 
  
     String to find in response headers and/or data 
    set ::find "oldname.example.com" 
  
     String to replace in response headers and/or data 
    set ::replace "newname.example.com" 
 } 
 when HTTP_REQUEST { 
  
    if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: New HTTP request to [HTTP::host][HTTP::uri]"} 
  
    HTTP::header remove "Accept-Encoding" 
    if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: Removing Accept-Encoding request header"} 
 } 
 when HTTP_RESPONSE { 
  
     Rewrite Location header value in HTTP redirects if it contains the $::find string 
       if {[HTTP::is_redirect] && [string tolower [HTTP::header "Location"]] contains $::find}{ 
  
           Replace $::find with $::replace in Location header value 
          HTTP::header replace Location [string map "$::find $::replace" [HTTP::header replace Location]] 
  
          if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: Updated location from [HTTP::header replace Location]\ 
             to [string map "$::find $::replace" [HTTP::header replace Location]]"} 
       } 
  
        Rewrite the response body if the response type is text 
       if { [HTTP::header "Content-Type"] starts_with "text/" } { 
  
           Configure the find/replace strings 
          STREAM::expression "@$::find@$::replace@" 
  
           Enable the stream filter 
          STREAM::enable 
  
          if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: Enabled stream filter for $::find -> $::replace"} 
  
       } else { 
  
           Disable the stream filter for non-text responses 
          STREAM::disable 
       } 
    } 
 }