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How to Find the Size of the HTTP Resource Being Fetched

How to Find the Size of the HTTP Resource Being Fetched

There are cases in which we might want to warn the user before an attempt is made to download a large file, or we might simply be interested to know its size before downloading.

In C#, we use the HttpWebRequest class to download objects from an URL. We can set the request method to be of “Head” type and examine the response header “Content-Length” to determine the size of the object.

string url = "http://mydomain.com/FileStore/bigfile.zip";var urlRequest = (HttpWebRequest)WebRequest.Create(url);//Set the request.method to ???HEAD???urlRequest.Method = "HEAD";var urlResponse = urlRequest.GetResponse();string contentLength = urlResponse.Headers.Get("Content-Length");Messagebox.Show(int.Parse(contentLength).ToString());

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