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HTTP HEAD Request to Determine if Resource Exists and SizeDownload: Chilkat .NET Assemblies This example sends an HTTP HEAD request to determine if a resource exists on an HTTP server. If so, it reports the size (in bytes) of the resource. The HTTP HEAD request can be used to query about a resource without downloading it. Chilkat.Http http = new Chilkat.Http(); bool unlocked = http.UnlockComponent("Any string begins 30-day trial"); if (!unlocked) { MessageBox.Show("Failed to unlock HTTP component"); return; } Chilkat.HttpRequest req = new Chilkat.HttpRequest(); req.UseHead(); req.Path = "/download/ChilkatDotNet.msi"; bool ssl = false; // Set this to true to use HTTPS Chilkat.HttpResponse resp = http.SynchronousRequest("www.chilkatsoft.com",80,false,req); if (resp == null) { MessageBox.Show(http.LastErrorText); return; } // Does the resource exist? if (resp.StatusCode == 200) { // Display a message with the size of the resource in bytes. MessageBox.Show("The web resource exists and is " + Convert.ToString(resp.ContentLength) + " bytes"); } else { // Show the full response header... MessageBox.Show(resp.Header); } Important: The download for this
example does not contain the ChilkatDotNet.dll which |
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