How Can I Robustly Validate HTTP and HTTPS URLs in C#?

Reliable C# Validation for HTTP and HTTPS URLs

Standard C# URI validation methods like Uri.IsWellFormedUriString and Uri.TryCreate can sometimes misidentify file paths as URLs. This article demonstrates a more robust approach specifically designed for validating HTTP and HTTPS URLs.

Validating HTTP URLs:

The following C# code provides a precise method for HTTP URL validation:

<code class="language-csharp">Uri uriResult;
bool result = Uri.TryCreate(uriName, UriKind.Absolute, out uriResult) 
    && uriResult.Scheme == Uri.UriSchemeHttp;</code>

This efficiently checks if the input (uriName) is a correctly formatted Uri object and confirms that the scheme is "http".

Extending Validation to Include HTTPS:

To accept both HTTP and HTTPS URLs, simply modify the validation:

<code class="language-csharp">Uri uriResult;
bool result = Uri.TryCreate(uriName, UriKind.Absolute, out uriResult) 
    && (uriResult.Scheme == Uri.UriSchemeHttp || uriResult.Scheme == Uri.UriSchemeHttps);</code>

This enhanced check accepts URLs with either "http" or "https" schemes.

Integrating this validation into your input processing ensures that only valid HTTP/HTTPS URLs are accepted, significantly improving the security and reliability of your application's input handling.

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