Available in all subroutines.
Selects the best match from a string in the format of an
header's value in the listed languages using the algorithm described in
RFC 4647, Section 3.4.
This function takes the following parameters:
- a colon-separated list of languages available for the resource,
- a fallback return value,
- a string representing an
This function conforms to RFC 4647.
set bereq.http.Accept-Language =accept.language_lookup("en:de:fr:nl", "en",req.http.Accept-Language);
Try it out
accept.language_lookup is used in the following solution recipes, which show real world use cases. Click RUN to provision a Fastly service, execute the code on Fastly, and see how the function behaves.
Improve cache performance by normalizing requests. Filter and reorder query params, convert to lowercase, filter headers, and more.
User contributed notes
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