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fred_zeig77's avatar
fred_zeig77
Icon for Altostratus rankAltostratus
Jul 22, 2024

Advice to partial rename uri path

Hi there masters!   I would like to ask for advice. Is there a possibility that after I redirect an URL I can partial rename the 1st two paths in the redirected URI path? So, for example: when cli...
application delivery
irule
security
uri manipulation
uri masking
  • CA_Valli's avatar
    CA_Valli
    Jul 23, 2024

    That's some very specific stuff you're trying to achieve .. 

    If the "client URL" you want to display does not exist on the server, I think you'll need two instructions in the iRule, one to redirect client to target URI and one to change this string before it connects to the webserver. 

    You might try something similar to this

    when HTTP_REQUEST {
  if { [HTTP::host] equals "companyA.com" }{ 
    #I'm using a switch statement so it's easier to add/change uri behavior in the future
    switch -glob [HTTP::path] {
      "/" { HTTP::redirect "https://[HTTP::host]/bed/table/r/Home" }
      "/bed/table/r/Home" { HTTP::path "/room/desktop/r/Home" } 
    }
  }
}

     

fred_zeig77's avatar
fred_zeig77
Icon for Altostratus rankAltostratus

Hi master!

 

Greetings! again. Is it okay to ask again for confirmation if you are still available? I notice in the code that because the path of our homepage has changed and masked the path on the side of client's browsers. What if our clients press a button containing a link to another path? would that give us an error 404 since the path the browser knows is the "/bed/table/...../"?

 

So, if lets say they click a login page button with a link at supposed uri path "/room/desktop/r/Home/Login" from "/room/desktop/r/Home" and this was masked to "/bed/table/r/Home"... Will client's browser able to direct to "/room/desktop/r/Home/Login" with the mask uri path or will this give them an error 404 code since the browser will shoot an HTTP get request header of path "/bed/table/r/Home/Login" when clients click the page's login link/button?

 

Apologies for the too many questions. This is my 1st time programming and use TCL/irule language. :)

 

 

Respectfully,

 

Zeig

CA_Valli's avatar
CA_Valli
Icon for MVP rankMVP
Aug 30, 2024

Hello, sorry for taking this long to respond, I was on hohliday.

So, the purpose of the iRule is to redirect clients to a "fake path" while still preserving the "real path" in server-side communication.

I've written it to be an exact match, as the only way to change the path in client broswer is performing an HTTP redirect; I don't expect clients to know that "/bed/table" does NOT exist. 

 

If there's hyperlinks that point to /room/desktop/r/Home/Login , client browser will use the information in the hyperlink to perform a brand new GET request using the path that's provided -- this means that clients will be able to reach the "real path" on the server-side directly, and browser will display the real url in this case. iRule will NOT intercept them as the intruction is an exact match.

 

If you require dynamic matching we need to change the switch statements and add some extra code to preserve the rest of the uri 

  • CA_Valli's avatar
    CA_Valli
    Icon for MVP rankMVP
    Aug 30, 2024

    This should be an upgrade 

    when HTTP_REQUEST {
  if { [HTTP::host] equals "companyA.com" }{ 
    #I'm using a switch statement so it's easier to add/change uri behavior in the future
    switch -glob [HTTP::path] {
      "/" { HTTP::redirect "https://[HTTP::host]/bed/table/r/Home" }
	  "/room/desktop/*" {
	    #this code portion will force client redirects, enforcing browser to display "bed table" fake url 
        set maskedURL "/bed/table/[substr [HTTP::uri] 14 0]" #replacing the first 14 characters off your URL. set to match exact length of "/room/desktop/"   	  
	    HTTP::redirect "https://[HTTP::host]/$maskedURL"		
	  }
      "/bed/table/*"	{
	    #this code portion rebuilds the correct server url 
        set rebuiltURL "/room/desktop/[substr [HTTP::uri] 11 0]" #replacing the first 11 characters off your URL. set to match exact length of "/bed/table/" 
        HTTP::uri "$rebuiltURL" 
      } 
    }
  }
}