Java Requires Chilkat v11.0.0+

Get Size of File on Web Server

See more HTTP Examples

Demonstrates 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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.HttpResponse;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Http http = new Http();

        HttpResponse resp = new HttpResponse();
        try {
            http.httpNoBody("HEAD", "https://nodejs.org/dist/v10.16.1/node-v10.16.1-win-x64.zip", resp);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Examine the response header.
        System.out.println(resp.getHeader());

        // 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 (contentLengthStr != null) {
            System.out.println("Content-Length: " + contentLengthStr);
            // Your application can convert the contentLengthStr to an integer and then use it....
        }
    }
}