Syntax

All variables are scoped, meaning they can only be accessed within the same or larger scope. When you set a variable, you prefix its names with a scope. The scope can be any of the following:

• proc: variable is available during all phases

• sess: variable is available during a client's entire TCP session

• txn: variable is available during an entire HTTP request-response transaction

• req: variable is available during the HTTP request phase only

• res: variable is available during the HTTP response phase only

Use the set-var directives to set a variable:

• http-request set-var

• http-response set-var

• http-response-after-response set-var

In the following example, the variable mypath is scoped to the transaction, which makes it available during both the request and response phases:

frontend www
   bind :80
   http-request set-var(txn.mypath) path

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