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Regular expressions allow for greater flexibility in resource matching. To enable regular expression matching, in the SiteMinder Rule dialog, select the Regular Expression check box.
Regular expressions are text patterns used for string matching. Examples of the syntax used in regular expressions are shown in the following table:
|
Characters |
Results |
|---|---|
|
\ |
Used to quote a meta-character (like '*') |
|
\\ |
Matches a single '\' character |
|
(A) |
Groups subexpressions (affects order of pattern evaluation) |
|
[abc] |
Simple character class (any character within brackets matches the target character) |
|
[a-zA-Z] |
Character class with ranges (any character range within the brackets matches the target character) |
|
[^abc] |
Negated character class |
|
. |
Matches any character other than newline |
|
^ |
Matches only at the beginning of a line |
|
$ |
Matches only at the end of a line |
|
A* |
Matches A 0 or more times (greedy) |
|
A+ |
Matches A 1 or more times (greedy) |
|
A? |
Matches A 1 or 0 times (greedy) |
|
A{n} |
Matches A exactly n times (greedy) |
|
A{n,} |
Matches A at least n times (greedy) |
|
A{n,m} |
Matches A at least n but not more than m times (greedy) |
|
A*? |
Matches A 0 or more times (reluctant) |
|
A+? |
Matches A 1 or more times (reluctant) |
|
A?? |
Matches A 0 or 1 times (reluctant) |
|
AB |
Matches A followed by B |
|
A|B |
Matches either A or B |
|
\1 |
Backreference to 1st parenthesized subexpression |
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\n |
Backreference to nth parenthesized subexpression |
Limit: Each regular expression can contain no more than 10 subexpressions, including the expression itself. The number of subexpressions equals the number of left or opening parentheses in the regular expression plus one more left parenthesis for the expression itself.
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