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(C#) Get Size of File on Web ServerDemonstrates how to send a HEAD request to fetch information about a file on a web server, which hopefully includes the Content-Length in the response header.
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.Http http = new Chilkat.Http(); Chilkat.HttpResponse resp = http.GetHead("https://nodejs.org/dist/v10.16.1/node-v10.16.1-win-x64.zip"); if (http.LastMethodSuccess == false) { Debug.WriteLine(http.LastErrorText); return; } // Examine the response header. Debug.WriteLine(resp.Header); // Here is a sample response header: // Date: Thu, 01 Aug 2019 12:47:27 GMT // Content-Type: application/zip // Content-Length: 17457922 // Connection: keep-alive // Set-Cookie: __cfduid=da5b78dcdd8171683c5a578eb9c9f88c81564663647; expires=Fri, 31-Jul-20 12:47:27 GMT; path=/; domain=.nodejs.org; HttpOnly // Last-Modified: Wed, 31 Jul 2019 18:21:57 GMT // ETag: "5d41dc45-10a6302" // Accept-Ranges: bytes // Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" // Server: cloudflare // CF-RAY: 4ff7ebb32ac4e1e2-ORD // Get the Content-Length header. string contentLengthStr = resp.GetHeaderField("Content-Length"); // If the header exists... if (resp.LastMethodSuccess == true) { Debug.WriteLine("Content-Length: " + contentLengthStr); // Your application can convert the contentLengthStr to an integer and then use it.... } |
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