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Forum Discussion

ppphatak_127926's avatar
ppphatak_127926
Icon for Nimbostratus rankNimbostratus
Apr 21, 2005

substr doesnt work as expected

This is simple rule I wrote. I have a virtual server on port 80 and a proxy for 443, both pointing to this rule.     I was expecting when url is https, it would go to yahoo and when its not...
application delivery
dev
devops
iRules
v4
Joe_Pruitt's avatar
Joe_Pruitt
Apr 22, 2005
There is nothing wrong with your script. The http_host contains the FQDN portion of the URL. Since it contains only the FQDN, it will never match your string compares to the protocol.

 

 

Per the 4.6.2 documentation:

 

 

The http_host variable specifies the value in the Host: header of the HTTP request. It indicates the actual FQDN that the client requested. Possible values are a FQDN or a host IP address in dot notation.

 

 

So, a uri splits out like this:

 

 

http://{http_host}{http_uri}

 

 

Unfortunately, I don't see a simple way to pick out the protocol portion of the whole URL from within iRules. I'll ask around with the other rules folks here on the 4.x team to see if they have another workaround but at this point I believe that you'll have to have a separate rule for your http and https VIPs.