Fix bug in memory-based HTTP data content initialization with input stream, add test (port from branch 3).

- Fixes #1170

codec-http/src/main/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpData.java

@@ -67,7 +67,7 @@ public abstract class AbstractMemoryHttpData extends AbstractHttpData {
         int read = inputStream.read(bytes);
         int written = 0;
         while (read > 0) {
-            buffer.writeBytes(bytes);
+            buffer.writeBytes(bytes, 0, read);
             written += read;
             read = inputStream.read(bytes);
         }

codec-http/src/test/java/io/netty/handler/codec/http/multipart/AbstractMemoryHttpDataTest.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2012 The Netty Project
+ *
+ * The Netty Project licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+package io.netty.handler.codec.http.multipart;
+
+import io.netty.buffer.ByteBuf;
+import org.junit.Test;
+
+import java.io.ByteArrayInputStream;
+import java.nio.charset.Charset;
+import java.security.SecureRandom;
+import java.util.Arrays;
+import java.util.Random;
+
+import static io.netty.util.CharsetUtil.UTF_8;
+import static org.junit.Assert.*;
+
+/** {@link AbstractMemoryHttpData} test cases. */
+public class AbstractMemoryHttpDataTest {
+    /**
+     * Provide content into HTTP data with input stream.
+     *
+     * @throws Exception In case of any exception.
+     */
+    @Test
+    public void testSetContentFromStream() throws Exception {
+        Random random = new SecureRandom();
+
+        for (int i = 0; i < 20; i++) {
+            // Generate input data bytes.
+            int size = random.nextInt(Short.MAX_VALUE);
+            byte[] bytes = new byte[size];
+
+            random.nextBytes(bytes);
+
+            // Generate parsed HTTP data block.
+            TestHttpData data = new TestHttpData("name", UTF_8, 0);
+
+            data.setContent(new ByteArrayInputStream(bytes));
+
+            // Validate stored data.
+            ByteBuf buffer = data.getByteBuf();
+
+            assertEquals(0, buffer.readerIndex());
+            assertEquals(bytes.length, buffer.writerIndex());
+            assertArrayEquals(bytes, Arrays.copyOf(buffer.array(), bytes.length));
+        }
+    }
+
+
+    /** Memory-based HTTP data implementation for test purposes. */
+    private static final class TestHttpData extends AbstractMemoryHttpData {
+        /**
+         * Constructs HTTP data for tests.
+         *
+         * @param name    Name of parsed data block.
+         * @param charset Used charset for data decoding.
+         * @param size    Expected data block size.
+         */
+        protected TestHttpData(String name, Charset charset, long size) {
+            super(name, charset, size);
+        }
+
+        @Override
+        public InterfaceHttpData.HttpDataType getHttpDataType() {
+            throw new UnsupportedOperationException("Should never be called.");
+        }
+
+        @Override
+        public HttpData copy() {
+            throw new UnsupportedOperationException("Should never be called.");
+        }
+
+        @Override
+        public int compareTo(InterfaceHttpData o) {
+            throw new UnsupportedOperationException("Should never be called.");
+        }
+    }
+}