Available inall subroutines.

Returns the length of the string s. For example, std.strlen("Hello world!"); will return 12 (because the string includes whitespaces and punctuation).


if (std.strlen(req.http.Cookie) > 1024) {
unset req.http.Cookie;

Try it out

std.strlen is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.

Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.

Compute intersection of two lists

Useful for comparing capabilities with required permissions.