![]() The actual number of rules processed per policy depends on the complexity of the regular expressions defined. Regular expressions have a very high processing cost, often 100 times more expensive than other match criteria. There is a maximum processing cost per policy. General considerations when using regular expressionsīefore using the URL Regular Expression match with Cloudlets, consider the following: In the results section, verify that the values entered produced the desired URLs.In the THEN section of the rule screen, the Redirect URL or Path and Query String field is disabled, but displays values entered in the same field for the Regex Tester. Note that the pattern uses backslash, "\", and not dollar sign "$".Įnter a URL to test whether the regular expression and any capture groups entered produce the desired URL. To define the substitution pattern, use the capture groups in the Regular Expression field. For example: \1://Note that the pattern uses backslash, "\", and not dollar sign "$".Įnter the substitution pattern to create the path and query string that will form the modified URL. If applicable, enter the substitution pattern to create the modified URL. For example: (http|https)://Redirect URL (Edge Redirector) Here's how a regex for Edge Redirector would look using both capture group methods:Įnter a regular expression of up to 256 characters to match on the inbound URL, minus the port. Remember that the maximum size of a regular expression is 256 characters. As the RE2 library supports named capture groups as numbered substitutions, use \n for the substitution string. When using named capture groups, use the following syntax before the regular expression (regex): (?Pregex). The URL Regular Expression match for Cloudlets supports a maximum of nine numbered substitutions using capture groups. The following diagram shows how you can set up numbered capture groups on parts of an inbound URL for Edge Redirector. Input Validation does not use capture groups. For example, \1 is the first capture group, \2 is the second, etc. Substitution patterns use the back slash character (“\”) followed by a number to refer to the capture groups. ![]() ![]() Capture groups allow you to capture incoming information from the source URL, while substitution patterns allow you to refer to those capture groups in the modified URL. ![]()
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