Question

I am using WebClient to get some info from a page that is sometimes not available [302 Moved Temporarily]. So i want to program to detect whether the page exists

I tried to override the WebClient WebResponse with the following code to only return the page when it’s status is OK but it did not worked.

protected override WebResponse GetWebResponse(WebRequest request)
{
    var response = base.GetWebResponse(request);

    if (response is HttpWebResponse)
        return (response as HttpWebResponse).StatusCode == HttpStatusCode.OK ? response : null;
    return null;
}

when i used my overriden class to get the page (when it is unavailable) it just redirected and did not returned null

Get code

private async Task<string> Get(string uri)
{
    return await Handler.DownloadStringTaskAsync(new Uri(uri));
}

[WHAT I WANT TO ACHIEVE] : i want the web client tried to get the page but it was not found so it has been redirected to another page.

Answer 1

This won’t tell you the status but it can be inferred by the fact that you were redirected.

if(reponse.ResponseUri != request.RequestUri) {
   // if you really want to know the status
   // set AllowAutoRedirect = false;
   // and send another request in here.
}