Getting the Redirected URL from the Original URL

Question

I have a table in my database which contains the URLs of some websites. I have to open those URLs and verify some links on those pages. The problem is that some URLs get red

Answer 1

Async HttpClient versions:

// works in .Net Framework and .Net Core
public static async Task GetRedirectedUrlAsync(Uri uri, CancellationToken cancellationToken = default)
{
    using var client = new HttpClient(new HttpClientHandler
    {
        AllowAutoRedirect = false,
    }, true);
    using var response = await client.GetAsync(uri, cancellationToken);

    return new Uri(response.Headers.GetValues("Location").First();
}

// works in .Net Core
public static async Task GetRedirectedUrlAsync(Uri uri, CancellationToken cancellationToken = default)
{
    using var client = new HttpClient();
    using var response = await client.GetAsync(uri, cancellationToken);

    return response.RequestMessage.RequestUri;
}

P.S. handler.MaxAutomaticRedirections = 1 can be used if you need to limit the number of attempts.