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5. Query string

Available inall subroutines.

Returns the separator needed by the querystring.filter and querystring.filter_except functions.

Example

set req.url = querystring.filter(req.url,
    "utm_source" + querystring.filtersep() +
    "utm_medium" + querystring.filtersep() +
    "utm_campaign");

Try it out

querystring.filtersep 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.