CF-Incidents Rules - Remove surrounding bytes with trim functions

[ENF News Bot]

Cloudflare Rules supports three new functions for removing surrounding bytes. Use them to remove whitespace before comparing request values. All HTTP products support these functions on all plans:

• trim() removes bytes from both ends.
• trim_start() removes bytes from the start.
• trim_end() removes bytes from the end.

By default, these functions remove ASCII whitespace. An optional constant string specifies a custom set of bytes.

If the input value is nil, these functions return nil.

For example, this expression removes surrounding whitespace before comparing a header value:


trim(http.request.headers["x-label"][0]) eq "approved"

For details, refer to the trim(), trim_start(), and trim_end() function references.

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