Alteon Application Switch Operating System Application Guide
Server Load Balancing
244 Document ID: RDWR-ALOS-V2900_AG1302
Advanced Content Modifications
In various cases there is a need to control the content returned by a Web application or sent to the
Web application. This can include modifying URLs of objects, modifying cookies or other HTTP
headers or modifying any text in the HTTP or HTML.
Alteon lets you modify different types of HTTP elements. Following are the HTTP elements that can
be modified:
• HTTP Headers—Can be inserted, replaced, or removed. See Configuring HTTP Modification for
HTTP Headers, page 246.
• Cookies—Can be replaced or removed. See Configuring HTTP Modification for Cookies,
page 249.
• File type—File type elements within the HTTP requests can be replaced. See Configuring HTTP
Modifications for the HTTP File Type, page 254.
• Status Line—Status line elements within the HTTP responses can be replaced. See Configuring
HTTP Modification for HTTP Status Line, page 255.
• URL—Within requests or responses, headers or entire message body can be replaced. See
Configuring HTTP Modification for URL Elements, page 256
.
• Text—Any text elements can be replaced in HTTP headers or the entire message body. See
Configuring HTTP Modification for Text Elements, page 265.
Depending on the element type, these modifications are applied to the header only or both header
and body of the HTTP responses or requests.
About Rule Lists
You can configure lists of HTTP modification rules (rule lists), and then associate a rule list to
services. The same HTTP modification rule list can be reused across virtual services. The rule-list
identifier is a name. Within each rule list, you create rules for each HTTP element type.
For more information on associating rule lists to services, see Associating HTTP Modification Rules to
a Service, page 267.
About Rules
HTTP Modification rules are based on different types of HTTP elements. A rule can be added,
removed, or copied. The rules are evaluated according to their priority, with the lowest number
getting evaluated first. The maximum number of rules in a rule list is 128.
When defining a rule, you first set the rule ID, and then select the desired element on which the rule
will be based on. You cannot update a rule after setting its rule ID and element. To change the
element, the rule must be deleted and a new rule created.
>> HTTP Load Balancing# textrep
Current text replace configuration: disabled
Enter enabled/disabled or clear [e|d|c] [c]: e
Enter action [replace|remove] []: remove
Enter text to remove []: this is a dummy line
To Next Page
Loading...
