ADC

Example 8: Redirect Queries to the Queried Server

September 14, 2021

Contributed by:

S S

Example Inc. wants to redirect query requests to the appropriate server, as shown here.

<Request: GET /query.cgi?server=5HOST: www.example.com
<Redirect URL: <http://web-5.example.com/>

To implement this redirection, you would first create a rewrite action with the values in the following table.

Action Name	Type of Rewrite Action	Expression to choose target reference	String expression for replacement text
Action-Rewrite-Replace_Hostheader	REPLACE	HTTP.REQ.HEADER(“Host”).BEFORE_STR(“.example.com”)	“server-“ + HTTP.REQ.URL.QUERY.VALUE(“web”)

You would then create a rewrite policy with the values in the following table.

Policy Name	Action Name	Undefined Action	Expression
`Policy-Rewrite-Replace_Hostheader`	`Action-Rewrite-Replace_Hostheader`	NOREWRITE	`HTTP.REQ.HEADER("Host").EQ("www.example.com")`

Example commands:

> add rewrite action Action-Rewrite-Server_Mask REPLACE HTTP.RES.HEADER("Server") "\"Web Server 1.0\"" Done

> add rewrite policy Policy-Rewrite-Server_Mask HTTP.RES.IS_VALID Action-Rewrite-Server_Mask NOREWRITE Done

Finally, you would bind the rewrite policy, assigning it a priority of 900. Because this policy should be the last policy applied to a request that matches its criteria, you set the goto expression to END.

Incoming requests to any URL that begins with <http://www.example.com/query.cgi?server>= are redirected to the server number in the query.

The official version of this content is in English. Some of the Cloud Software Group documentation content is machine translated for your convenience only. Cloud Software Group has no control over machine-translated content, which may contain errors, inaccuracies or unsuitable language. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, suitability, or correctness of any translations made from the English original into any other language, or that your Cloud Software Group product or service conforms to any machine translated content, and any warranty provided under the applicable end user license agreement or terms of service, or any other agreement with Cloud Software Group, that the product or service conforms with any documentation shall not apply to the extent that such documentation has been machine translated. Cloud Software Group will not be held responsible for any damage or issues that may arise from using machine-translated content.

Example 8: Redirect Queries to the Queried Server

September 14, 2021

Contributed by:

S S

September 14, 2021

Contributed by:

S S

Example 8: Redirect Queries to the Queried Server

In this article