(C# UWP/WinRT) Manually Follow HTTP Redirects

Demonstrates how to manually follow redirects for an HTTP GET.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

// The FollowRedirects property controls whether redirects
// are automatically followed.  The default behavior is to
// automatically follow redirects.

// Explicitly set FollowRedirects so that redirects are NOT automatically taken:
http.FollowRedirects = false;

Chilkat.HttpResponse resp = await http.QuickGetObjAsync("http://yandex.ru/");
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

int status = resp.StatusCode;
Debug.WriteLine("HTTP Response Status: " + Convert.ToString(status));

// The FinalRedirectUrl property will contain the redirect URL
// If FollowRedirects was equal to true, then all of the 
// intermediate redirects (if any) would be followed until
// there were no more redirects.  However, because 
// FollowRedirects is not true, FinalRedirectUrl contains
// the next redirect URL.

int loopCount = 0;

while ((status == 302)) {

    // IMPORTANT: This example requires Chilkat v9.5.0.49 or greater because
    // the FinalRedirectUrl in prior versions is only set when redirects
    // are automatically followed.   Starting in v9.5.0.49, the FinalRedirectUrl is
    // set to the next redirect URL when a 301/302 response is received, regardless
    // of the value of the FollowRedirects property.
    Debug.WriteLine("Redirect URL: " + http.FinalRedirectUrl);

    string nextUrl = http.FinalRedirectUrl;
    resp = await http.QuickGetObjAsync(nextUrl);
    if (http.LastMethodSuccess == false) {
        Debug.WriteLine(http.LastErrorText);
        return;
    }

    status = resp.StatusCode;
    Debug.WriteLine("HTTP Response Status: " + Convert.ToString(status));

    // For safety, prevent infinite loops by
    // keeping a loopCount and only allows following a max 
    // of 10 redirects:
    loopCount = loopCount + 1;
    if (loopCount > 10) {

        Debug.WriteLine("Too many redirects.");
        return;
    }

}