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sandy16's avatar
sandy16
Icon for Altostratus rankAltostratus
Dec 03, 2014

Irule help for host header redirection

Hi experts, I need to write an irule which will redirect some different host headers/urls to one single-different url. After doing some digging around on devcentral i found this one should do the job -

 

when HTTP_REQUEST { if {[HTTP::host] equals "www.example.com" } { HTTP::redirect "https://mywebsite.com" } }

 

Let`s say I also need to redirect two more host headers like "abccorp.com" and "xyzmedia.ca" to the same "https://mywebsite.com" , how can i redo my above irule? Should it be with multiple "if" statements?

 

application delivery
devops
iRules

5 Replies

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  • shaggy_121467's avatar
    shaggy_121467
    Icon for Cumulonimbus rankCumulonimbus
    Dec 03, 2014

    if it's a list of hostnames that isn't too large and won't be changing too often, i would just use some or's:

    when HTTP_REQUEST {
 if {([string tolower [HTTP::host]] equals "www.example.com") or ([string tolower [HTTP::host]] equals "abccorp.com" or [string tolower [HTTP::host]] equals "xyzmedia.ca")} {
  HTTP::redirect "https://mywebsite.com"
 }
}

    if you want the irule to be more flexible and extensible in regards to adding hostnames, you should use a data group. create data-group (reference in irule below as hostname-data-group) with a list of the hostnames you want redirected, and use an irule similar to:

    when HTTP_REQUEST {
 if { class match [string tolower [HTTP::host]] equals hostname-data-group } {
  HTTP::redirect "https://mywebsite.com"
 }
}
  • shaggy's avatar
    shaggy
    Icon for Nimbostratus rankNimbostratus
    Dec 03, 2014

    if it's a list of hostnames that isn't too large and won't be changing too often, i would just use some or's:

    when HTTP_REQUEST {
 if {([string tolower [HTTP::host]] equals "www.example.com") or ([string tolower [HTTP::host]] equals "abccorp.com" or [string tolower [HTTP::host]] equals "xyzmedia.ca")} {
  HTTP::redirect "https://mywebsite.com"
 }
}

    if you want the irule to be more flexible and extensible in regards to adding hostnames, you should use a data group. create data-group (reference in irule below as hostname-data-group) with a list of the hostnames you want redirected, and use an irule similar to:

    when HTTP_REQUEST {
 if { class match [string tolower [HTTP::host]] equals hostname-data-group } {
  HTTP::redirect "https://mywebsite.com"
 }
}
  • Sheigh_65772's avatar
    Sheigh_65772
    Icon for Cirrus rankCirrus
    Dec 04, 2014

    Here's another options as well, really just comes down to how much data you got and how you want to manage it. Personally I like the second options Shaggy suggested.

    when HTTP_REQUEST {
    set host [string tolower [HTTP::host]]
    switch $host {
        "site1.com" -
        "site2.com" -
        "www.site3.com" {
            HTTP::redirect "https://mywebsite.com"
        }
    }
}