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Forum Discussion

milanv_137346's avatar
milanv_137346
Icon for Nimbostratus rankNimbostratus
Nov 20, 2013

Set Host header

Hi, I'm a newbie to this. Can someone help me correct the iRule below? We need the first value in the X-Forwarded-Host to be assigned to the Host header regards, Milan when HTTP_REQUEST { i...
application delivery
devops
iRules
Kevin_Stewart's avatar
Kevin_Stewart
Icon for Employee rankEmployee
Nov 20, 2013

Try this:

when HTTP_REQUEST {
    if { [HTTP::header exists X-Forwarded-Host] } {
        HTTP::header replace X-Forwarded-Host [string trim [lindex [split [HTTP::header X-Forwarded-Host] ","] 0]]
    }
}

If the header exists, there's a pretty good bet that it'll have at last one value. If the header has two values delimited with a comma, the above will take the first one. If the header only contains one value, then the split function will produce a list of one, which will still be at the 0 index.