CACHE_REQUEST¶

Description¶

Triggered when the system receives a request for an object eligible to be cached. Used to override default behavior.

Examples¶

when CACHE_REQUEST {
  if { [CACHE::age] > 60 } {
    CACHE::expire
    log local0. "Expiring content: Age > 60 seconds"
   }
}

Related Information¶

Available Commands:

CACHE::trace - Dump the list of cached objects for a HTTP profile where RAM cache is enabled.
clone - Causes the system to clone traffic to the specified pool or pool member regardless of monitor status.
forward - Sets the connection to forward IP packets.
HTTP::close - Closes the HTTP connection.
HTTP::collect - Collects an amount of HTTP body data that you specify.
HTTP::cookie - Queries for or manipulates cookies in HTTP requests and responses.
HTTP::fallback - Specifies or overrides a fallback host specified in the HTTP profile.
HTTP::header - Queries or modifies HTTP headers.
HTTP::host - Returns the value of the HTTP Host header
HTTP::is_keepalive - Returns a true value if this is a Keep-Alive connection.
HTTP::is_redirect - Returns a true value if the response is a redirect.
HTTP::password - Returns the password part of HTTP basic authentication.
HTTP::payload - Queries for or manipulates HTTP payload information.
HTTP::redirect - Redirects an HTTP request or response to the specified URL.
HTTP::request_num - Returns the number of HTTP requests that a client made on the connection.
HTTP::uri - Returns or sets the URI part of the HTTP request.
HTTP::username - Returns the username part of HTTP basic authentication.
HTTP::version - Returns or sets the HTTP version of the request or response.
imid - Returns an i-mode identifier string.
IP::idle_timeout - Returns or sets the idle timeout value.
ip_ttl - Returns the TTL of the latest IP packet received.
lasthop - Sets the lasthop of an IP connection.
listen - Sets up a related ephemeral listener to allow an incoming related connection to be established.
LSN::address - Set or override translation address.
LSN::disable - Disable LSN translation.
LSN::inbound - Disable inbound connections to translation address/port.
LSN::persistence - Set translation selection mode and persistence timeout.
LSN::persistence-entry - Create or lookup translation address.
LSN::pool - Specify LSN pool for current connection.
LSN::port - Set or override translation port.
nexthop - Sets the nexthop of an IP connection.
node - Sends the packet directly to the identified server node.
peer - Causes the specified iRule commands to be evaluated under the peer’s (opposite) context.
persist - Causes the system to use the named persistence type to persist the connection.
session - Utilizes the persistence table to store arbitrary information based on the same keys as persistence.
SSL::cert - Returns X509 SSL certificate data.

Warning

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Sample Code:

Introduced: BIGIP-9.0.3

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