Uploading a Video

package mi.uploader;

import java.io.*;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;

public class App {

    public static Integer CHUNK_SIZE = 2_097_152;
    public static Integer MAX_RETRIES = 10;

    public static HttpClient client = HttpClient.newBuilder()
            .version(HttpClient.Version.HTTP_1_1)
            .followRedirects(HttpClient.Redirect.NORMAL)
            .connectTimeout(Duration.ofSeconds(20))
            .build();

    public static void main(String[] args) throws IOException, InterruptedException {

        /*
         Step 1. https://doc.movingimage.com/display/LT/Creating+a+Video+Entity
         Step 2. https://doc.movingimage.com/display/LT/Getting+the+Upload+URL
         Step 3. Upload
         */

        URI url = URI.create("{URL obtained via API}");
        File f = new File("sample_600s_25fps_1080.mp4");
        InputStream inputStream = new FileInputStream(f);

        long totalChunks = calculateChunks(f.length());


        for (int i = 1; i <= totalChunks; i++) {

            byte[] data = new byte[CHUNK_SIZE];

            inputStream.read(data);

            int statusCode = 0;
            int retryAttempts = 0;
            do {
                if (statusCode >= 500) {
                    Thread.sleep(2000);
                }

                if (retryAttempts++ >= MAX_RETRIES) {
                    throw new RuntimeException("Upload failed. Please try again later.");
                }

                HttpRequest request = HttpRequest.newBuilder()
                        .POST(HttpRequest.BodyPublishers.ofByteArray(data))
                        .uri(url)
                        .setHeader("Mi24-Upload-Total-Chunks", String.valueOf(totalChunks)) // add request header
                        .setHeader("Mi24-Upload-Current-Chunk", String.valueOf(i)) // add request header
                        .build();

                HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

                statusCode = response.statusCode();

                System.out.println("Status: "+statusCode);

            } while (statusCode >= 500);

        }

        System.out.println("Done");

    }

    public static long calculateChunks(long fileSize) {

        long remainder = fileSize % CHUNK_SIZE;
        int totalChunks = Math.toIntExact(fileSize / CHUNK_SIZE);

        if (remainder > 0) {
            totalChunks = totalChunks + 1;
        }

        return totalChunks;
    }
}