MACROMEDIA DREAMWEAVER MX 2004-EXTENDING DREAMWEAVER Spezifikationen PDF herunterladen (Seite 370)

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370 Server Behaviors

The search string is defined as a regular expression by starting and ending with a slash (/) and

is followed by

i, which means that it is not case-sensitive. Within the regular expression,

special characters such as parentheses () and periods (.) are escaped by preceding them with a

backslash (\). The two parameters

rs and new__url are extracted from the string by using

parenthetical subexpressions (the parameters must be enclosed in parentheses). In this

example, they are indicated by

(\w+) and ([^\r\n]*): These values correspond to the

regular expression values that are normally returned by

$1 and $2.

Optional search patterns There might be cases where you want to identify a participant

even if some parameters are not found. You might have a participant that stores some optional

information such as a telephone number. For such an example, you could use the following

ASP code:

<% //address block

LNAME = "joe";

FNAME = "smith";

PHONE = "123-4567";

You could use the following search patterns:

<quickSearch>address</quickSearch>

<searchPattern paramNames="lname">/LNAME\s*=\s*"([^\r\n]*)"/i¬

</searchPattern>

<searchPattern paramNames="fname">/FNAME\s*=\s*"([^\r\n]*)"/i¬

</searchPattern>

<searchPattern paramNames="phone">/PHONE\s*=\s*"([^\r\n]*)"/i¬

</searchPattern>

</searchPatterns>

In the previous example, the telephone number must be specified. However, you can make

the telephone number optional, by adding the

isOptional attribute, as shown in the

following example:

<quickSearch>address</quickSearch>

<searchPattern paramNames="lname">/LNAME\s*=\s*"([^\r\n]*)"/i¬

</searchPattern>

<searchPattern paramNames="fname">/FNAME\s*=\s*"([^\r\n]*)"/i¬

</searchPattern>

<searchPattern paramNames="phone" isOptional="true">¬

/PHONE\s*=\s*"([^\r\n]*)"/i

</searchPattern>

</searchPatterns>

Now the participant is recognized, even if the telephone number is not found.

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