URL Slug Regex for Go

What this pattern does

This page provides a well-structured, multi-part regular expression for matching url slug, ported and verified for Go. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

// URL Slug
// ReDoS-checked | RegexVault — Web & Network > URL

package validation

import "regexp"

var urlSlugRe = regexp.MustCompile(`^[a-z0-9](?:[a-z0-9\-]{0,98}[a-z0-9])?$`)

func ValidateUrlSlug(s string) bool {
    return urlSlugRe.MatchString(s)
}

// Example
// fmt.Println(ValidateUrlSlug("hello-world")) // true

Test Cases

When to use this pattern

This pattern is drawn from the Web & Network > URL category and has been checked for ReDoS risk. That matters for Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Maximum length 100 chars enforced by the {0,98} bound. This pattern does not enforce no-consecutive-hyphens by default. To reject double hyphens, add a negative lookahead: (?!.*--) after the ^.