Response header modification examples
The following examples illustrate how to perform response header modifications with Transform Rules:
- Set an HTTP response header to a static value
- Set an HTTP response header to the current bot score
- Add an HTTP response header with a static value
- Remove an HTTP response header
Set an HTTP response header to a static value
The following HTTP Response Header Modification Rule sets a header named X-Source to a static value (Cloudflare) in the response:
Text in Expression Editor:
starts_with(http.request.uri.path, "/en/")Selected operation under Modify response header: Set static
Header name: X-Source
Value: Cloudflare
This rule would overwrite any existing X-Source headers already present in the response.
Set an HTTP response header to the current bot score
The following HTTP Response Header Modification Rule sets a header named X-Bot-Score to the current bot score in the response:
Text in Expression Editor:
starts_with(http.request.uri.path, "/en/")Selected operation under Modify response header: Set dynamic
Header name: X-Bot-Score
Value: to_string(cf.bot_management.score)
This rule would overwrite any existing X-Bot-Score headers already present in the response.
Add an HTTP response header with a static value
The following HTTP Response Header Modification Rule adds a header named set-cookie with a static value (cookiename=value) to the response:
Text in Expression Editor:
starts_with(http.request.uri.path, "/en/")Selected operation under Modify response header: Add
Header name: set-cookie
Value: cookiename=value
This rule would keep any existing set-cookie headers already present in the response.
Remove an HTTP response header
The following HTTP Response Header Modification Rule removes the cf-connecting-ip header from the response:
Text in Expression Editor:
starts_with(http.request.uri.path, "/private/")Selected operation under Modify response header: Remove
Header name: cf-connecting-ip