Cisco Explorer 4700 Installation Guide download pdf (Page 314)

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance

OL-26645-01

Chapter 8 Configuring Parameter Maps

Configuring Optimization Parameter Maps

Table 8-6 lists the parameter expander functions that you can use.

Table 8-6 Parameter Expander Functions

Variable Description

$(number) Expands to the corresponding matching subexpression (by number)

in the URL pattern. Subexpressions are marked in a URL pattern

using parentheses (). The numbering of the subexpressions begins

with 1 and is the number of the left-parenthesis “(“ counting from

the left. You can specify any positive integer for the number. $(0)

matches the entire URL. For example, if the URL pattern is

((http://server/.*)/(.*)/)a.jsp, and the URL that matches it is

http://server/main/sub/a.jsp?category=shoes&session=99999, then

the following are correct:

$(0) = http://server/main/sub/a.jsp

$(1) = http://server/main/sub/

$(2) = http://server/main

$(3) = sub

If the specified subexpression does not exist in the URL pattern,

then the variable expands to the empty string.

$http_query_string() Expands to the value of the whole query string in the URL. For

example, if the URL is

http://myhost/dothis?param1=value1&param2=value2, then the

following is correct:

$http_query_string() = param1=value1&param2=value2

This function applies to both GET and POST requests.

$http_query_param(query-param-name)

The obsolete syntax is also supported:

$param(query-param-name)

Expands to the value of the named query parameter (case-sensitive).

For example, if the URL is

http://server/main/sub/a.jsp?category=shoes&session=99999, then

the following are correct:

$http_query_param(category) = shoes

$http_query_param(session) = 99999

If the specified parameter does not exist in the query, then the

variable expands to the empty string. This function applies to both

GET and POST requests.

$http_cookie(cookie-name) Evaluates to the value of the named cookie. For example,

$http_cookie(cookiexyz). The cookie name is case-sensitive.

$http_header(request-header-name) Evaluates to the value of the specified HTTP request header. In the

case of multivalued headers, it is the single representation as

specified in the HTTP specification. For example,

$http_header(user-agent). The HTTP header name is not

case-sensitive.

$http_method() Evaluates to the HTTP method used for the request, such as GET or

POST.

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