Java

Bunny Sign URL and then Download using Signed URL

See more Bunny CDN Examples

Shows how to sign a URL for BunnyCDN Token Authentication and then use it to download. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.DateTime;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.StringBuilder;
import com.chilkatsoft.chilkat2.Url;

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.

        String mySecurityKey = "e7ea8d73-8fa0-44ef-a2cc-91526f7df5ed";

        String url = "https://test.b-cdn.net/sample-pdf-with-images.pdf";

        // Extract the URL components.
        Url urlObj = new Url();
        urlObj.parseUrl(url);

        String url_scheme = "https";
        if (!urlObj.getSsl()) {
            url_scheme = "http";
        }

        String url_host = urlObj.getHost();
        String url_path = urlObj.getPath();

        // Calculate an expiration time 1 hour from the current date/time.
        DateTime expTime = new DateTime();
        expTime.setFromCurrentSystemTime();
        expTime.addSeconds(3600);
        String expires = expTime.getAsUnixTimeStr(false);

        System.out.println("Expires = " + expires);

        // Create the string to hash
        StringBuilder sbToHash = new StringBuilder();
        sbToHash.append(mySecurityKey);
        sbToHash.append(url_path);
        sbToHash.append(expires);

        // Base64Url encoding is the same as base64, except "-" is used instead of "+",
        // "_" is used instead of "/", and no "=" padding is added.
        String token = sbToHash.getHash("sha256", "base64Url", "utf-8");

        StringBuilder sbSignedUrl = new StringBuilder();
        sbSignedUrl.append(url_scheme);
        sbSignedUrl.append("://");
        sbSignedUrl.append(url_host);
        sbSignedUrl.append(url_path);
        sbSignedUrl.append("?token=");
        sbSignedUrl.append(token);
        sbSignedUrl.append("&expires=");
        sbSignedUrl.append(expires);

        String signedUrl = sbSignedUrl.getAsString();
        System.out.println("Signed URL: " + signedUrl);

        // Use the signed URL to download the file.
        Http http = new Http();
        try {
            http.download(signedUrl, "c:/aaworkarea/sample.pdf");
            System.out.println("Success.");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
        }
    }
}