Improve recording download from server

common/src/main/java/ctbrec/recorder/download/hls/MergedHlsDownload.java

@@ -22,6 +22,7 @@ import ctbrec.Hmac;
 import ctbrec.Model;
 import ctbrec.OS;
 import ctbrec.io.HttpClient;
+import ctbrec.io.HttpException;
 import ctbrec.io.StreamRedirectThread;
 import ctbrec.recorder.ProgressListener;
 import ctbrec.recorder.RecordingManager;
@@ -150,21 +151,22 @@ public class MergedHlsDownload extends HlsDownload {
     private void downloadFile(String fileUri, File tempDir) throws IOException {
         LOG.trace("Downloading file {} to {}", fileUri, tempDir);
         Request request = new Request.Builder().url(fileUri).addHeader("connection", "keep-alive").build();
-        Response response = client.execute(request);
+        try (Response response = client.execute(request)) {
+            if (response.isSuccessful()) {
                 InputStream in = null;
                 File file = new File(request.url().encodedPath());
-        try (FileOutputStream fos = new FileOutputStream(new File(tempDir, file.getName()))) {
+                File downloadedSegment = new File(tempDir, file.getName());
+                try (FileOutputStream fos = new FileOutputStream(downloadedSegment)) {
                     in = response.body().byteStream();
                     byte[] b = new byte[1024 * 100];
                     int length = -1;
                     while ((length = in.read(b)) >= 0) {
                         fos.write(b, 0, length);
                     }
-        } finally {
-            if (in != null) {
-                in.close();
                 }
-            response.close();
+            } else {
+                throw new HttpException(response.code(), response.message());
+            }
         }
     }