Available in all subroutines.

Returns the given URL with its query string sorted. For example, querystring.sort("/foo?b=1&a=2&c=3"); returns "/foo?a=2&b=1&c=3".


set req.url = querystring.sort(req.url);

Try it out

querystring.sort 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.

Manipulate query string

Add, remove, and sort querystring parameters.

Normalize requests

Improve cache performance by normalizing requests. Filter and reorder query params, convert to lowercase, filter headers, and more.