Cloudflare Dynamic Redirect Rule: Dynamically Match and Replace URL Path Segments via RegExp [301]

cloudflare-dynamic-redirect-rule-dynamically-match-and-replace-url-path-segments-via-regexp-301.md

Dynamically Match and Replace URL Path Segments via RegExp [301]

• Rule Name: Dynamic Redirect of Brand Locations [301]

Expression

(http.request.uri.path matches "^/locations/.*-tires-.*.asp$")

Then.. URL Redirect

• Type: Dynamic
• Expression: concat("https://", http.host, lower(regex_replace(http.request.uri.path, "^/locations/.*.-tires-(.*).asp$", "/locations/${1}/")))
• Status Code: 301
• Preserve Query String?: false

Overview

This expression uses a Regular Expression to match incoming request URLs that follow a specific pattern.

Match Expression

The pattern ^/locations/.*-tires-.*.asp$ breaks down as follows:

• ^ asserts the start of the line.
• /locations/ matches URLs that begin with /locations/.
• .* is a wildcard that matches any character (except newline) 0 or more times, used here to signify any string before -tires-.
• -tires- specifically matches this sequence of characters, indicating a particular segment in the URL path.
• .* again, matches any sequence of characters after -tires- and before .asp.
• .asp matches URLs that end with .asp.
• $ asserts the end of the line.

URL Redirect Expression

• concat() function is used to join several string segments into one URL.
• https:// specifies the protocol of the redirect URL.
• http.host includes the original host name of the incoming request.
• lower() function converts the entire resulting URL to lowercase.
• regex_replace() function takes the original path, matches it against ^/locations/.*-tires-(.*).asp$, and replaces it with /locations/${1}/ where ${1} represents the captured group in the original RegExp (the part of the URL that comes after -tires- and before .asp).
• This effectively changes the URL structure from /locations/<something>-tires-<brandName>.asp to /locations/<brandName>/, making the URL cleaner and more SEO-friendly.