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David_M's avatar
David_M
Icon for Cirrostratus rankCirrostratus
Dec 10, 2019

IIS Server redirects the f5 redirect and we are on a LOOP!

I can see that the backend IIS server redirects the domain.com/the-uri-needed URI again to /the-uri-needed. 

 

The correct redirect should have been from domain.com/ to domain.com/the-uri-needed, but that's not the case. 

 

Hence when the f5 redirects what we get is the following loop scenario.

 

domain.com/ ---> IRULE ------> domain.com/the-uri-needed -----> IIS redirect -----> domain.com/the-uri-needed -----> IIS redirect again -----> domain.com/the-uri-needed -----> BREAKS THE SITE!

 

Chrome on its own handles this but with f5 this is not the case..

 

What can I do here?

 

UPDATE 11 DEC 2019:

 

I tried to simulate this on IIS but IIS doesn't support redirects from a /uri but only for the host, so I think there is also some problems with the application's own redirects here.

 

application delivery
iRules
    • David_M's avatar
      David_M
      Icon for Cirrostratus rankCirrostratus
      Dec 10, 2019

      I tried few things but it did not work ..one is to replace the link from the response but still nothing . . 

      when HTTP_REQUEST {
 
    HTTP::header remove Accept-Encoding
    STREAM::disable
}
when HTTP_RESPONSE {
 
    if { [HTTP::header exists Location] } {
      	  HTTP::header replace Location [string map {"https://domain.com/the-uri-needed" "https://domain.com/"} [HTTP::header Location]]
		 
		  
    }
 
    if { [HTTP::header Content-Type] contains "text" } {
 
        STREAM::expression {@https://domain.com/the-uri-needed@https://domain.com/@}
 
    }
        STREAM::enable
}

      This is one..

      And another one to do the normal redirect from hostname to hostname/uri.

      • Enes_Afsin_Al's avatar
        Enes_Afsin_Al
        Icon for MVP rankMVP
        Dec 11, 2019

        I think, this iRule looking clean.

        Could each request match the redirect iRule?

        Example loop:

        when HTTP_REQUEST {
	if { [HTTP::uri] starts_with "/" } {
		HTTP::redirect "https://domain.com/the-uri-needed"
	}
}