Drop RandomAccessBody.transferTo position parameter, close AsyncHttpClient#1021

Author: slandelle

client/src/main/java/org/asynchttpclient/netty/request/body/BodyFileRegion.java

@@ -54,7 +54,7 @@ public long transfered() {
 
     @Override
     public long transferTo(WritableByteChannel target, long position) throws IOException {
-        long written = body.transferTo(position, target);
+        long written = body.transferTo(target);
         if (written > 0) {
             transfered += written;
         }

client/src/main/java/org/asynchttpclient/request/body/RandomAccessBody.java

@@ -24,13 +24,11 @@ public interface RandomAccessBody extends Body {
     /**
      * Transfers the specified chunk of bytes from this body to the specified channel.
      * 
-     * @param position
-     *            The zero-based byte index from which to start the transfer, must not be negative.
      * @param target
      *            The destination channel to transfer the body chunk to, must not be {@code null}.
      * @return The non-negative number of bytes actually transferred.
      * @throws IOException
      *             If the body chunk could not be transferred.
      */
-    long transferTo(long position, WritableByteChannel target) throws IOException;
+    long transferTo(WritableByteChannel target) throws IOException;
 }

client/src/main/java/org/asynchttpclient/request/body/multipart/MultipartBody.java

@@ -102,7 +102,8 @@ public BodyState transferTo(ByteBuffer target) throws IOException {
     }
 
     // RandomAccessBody API, suited for HTTP but not for HTTPS (zero-copy)
-    public long transferTo(long position, WritableByteChannel target) throws IOException {
+    @Override
+    public long transferTo(WritableByteChannel target) throws IOException {
 
         if (done)
             return -1L;