-    this.file = file;
-    this.contentType = contentType;
-  }
-  public long getContentLength() {
-    return this.file.length();
-  }
-
-  public String getContentType() {
-    return this.contentType;
-  }
-
-  public boolean isRepeatable() {
-    return true;
-  }
-
-  public void writeRequest(final OutputStream out) throws IOException {
-    byte[] tmp = new byte[4096];
-    int i = 0;
-    InputStream instream = new FileInputStream(this.file);
-    try {
-      while ((i = instream.read(tmp)) >= 0) {
-        out.write(tmp, 0, i);
-      }
-    } finally {
-      instream.close();
+
+    public boolean isRepeatable() {
+        return true;
+    }
+    
+    public void setOnDatatransferProgressListener(OnDatatransferProgressListener listener) {
+        this.listener = listener;
+    }
+
+    public void writeRequest(final OutputStream out) throws IOException {
+        byte[] tmp = new byte[4096];
+        int i = 0;
+        InputStream instream = new FileInputStream(this.file);
+        try {
+            while ((i = instream.read(tmp)) >= 0) {
+                out.write(tmp, 0, i);
+                if (listener != null) 
+                    listener.transferProgress(i);
+            }
+        } finally {
+            instream.close();
+        }