HP e-Commerce / XML director server appliance sa8250 - Users Guide

C H A P T E R 2 HP e-Commerce/XML Director Server Appliance SA8250 User Guide

RICH expressions in XML patterns

Layer 7 RICH_HTTP service configurations use rich expressions to

assign particular classes of URLs to particular servers for fulfillment.

RICH expressions are used, for example, to distinguish content

requested by clients performing online transactions, from content

typically requested by casual browsers. In this way, users performing

online transactions are given higher priority access to server

resources (and better response times) than other users.

Each server listed for fulfillment of a RICH_HTTP service can be

configured to serve any number of specific rich expressions. This is a

list of applicable expressions:

• File type expressions, such as

*.gif, or */index.html

• Path expressions, such as /home/*, or /home/images/*, or

/home/images/a*.

• Unique file expressions, such as

/index.html

• Wildcard expression, such as *.

• Negation expressions, such as

!*.gif or !*/index.html

RICH and XML expressions are managed with these commands:

config policygroup <name> service <name> server

<name> port <port> xmlpattern create

config policygroup <name> service <name> server

<name> port <port> xmlpattern delete

config policygroup <name> service <name> server

<name> port <port> xmlpattern info

For more details on these commands, see Chapter 5.