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kitday's avatar
kitday
Icon for Nimbostratus rankNimbostratus
Jan 08, 2020

iRule for CORS OPTIONS Header

I am working on creating an iRule that sends a 200 response when an OPTIONS header is sent. Here is the rule:

when HTTP_REQUEST {
        if { ( [HTTP::method] equals "OPTIONS" ) } {
                HTTP::respond 200 Access-Control-Allow-Origin "[HTTP::header Origin]" 
                                  Access-Control-Allow-Methods "POST, GET, OPTIONS"
                                  Access-Control-Allow-Headers "[HTTP::header Access-Control-Request-Headers]" 
                                  Access-Control-Max-Age "86400"
                return
        }
    }

When attempting to deploy this irule to an application, I am given the following error:

IRule error: Transaction on BIG-IP failed after 0 seconds: 01070151:3: Rule [/Common/CORS-Preflight] error: /Common/CORS-Preflight:4: error: [undefined procedure: Access-Control-Allow-Methods][Access-Control-Allow-Methods "POST, GET, OPTIONS"] /Common/CORS-Preflight:5: error: [undefined procedure: Access-Control-Allow-Headers][Access-Control-Allow-Headers "[HTTP::header Access-Control-Request-Headers]" ] /Common/CORS-Preflight:6: error: [undefined procedure: Access-Control-Max-Age][Access-Control-Max-Age "86400"]

Can anyone help with what the syntax issue may be with this?

application delivery
cors
irule
iRules

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  • Enes_Afsin_Al's avatar
    Enes_Afsin_Al
    Icon for MVP rankMVP
    Jan 08, 2020

    Hi kitday,

    Can you try this?

    when HTTP_REQUEST {
	if { ( [HTTP::method] equals "OPTIONS" ) } {
		HTTP::respond 200 Access-Control-Allow-Origin "[HTTP::header Origin]" \
			Access-Control-Allow-Methods "POST, GET, OPTIONS" \
			Access-Control-Allow-Headers "[HTTP::header Access-Control-Request-Headers]" \
			Access-Control-Max-Age "86400"
		return
	}
}