---
title: Validate domain on query string
summary: Check the query string if it contains a valid domain.
url: https://www.fastly.com/documentation/solutions/examples/validate-domain-on-query-string
---

Check the query string if it contains a valid domain. 

## VCL

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/fea87b9a)

## Compute

### Rust

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/603ebe04)

### Javascript

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/73293c32)

### Go

[Try it in Fastly Fiddle](https://fiddle.fastly.dev/57b39c09)