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Async Http Client library purpose is to allow Java applications to easily execute HTTP requests and asynchronously process the HTTP responses.

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/*
 * Copyright (c) 2014 AsyncHttpClient Project. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */
package com.ning.http.client.multipart;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.channels.WritableByteChannel;
import java.nio.charset.Charset;

public class ByteArrayPart extends AbstractFilePart {

    private final byte[] bytes;

    public ByteArrayPart(String name, byte[] bytes) {
        this(name, bytes, null);
    }

    public ByteArrayPart(String name, byte[] bytes, String contentType) {
        this(name, bytes, contentType, null);
    }

    public ByteArrayPart(String name, byte[] bytes, String contentType, Charset charset) {
        this(name, bytes, contentType, charset, null);
    }

    public ByteArrayPart(String name, byte[] bytes, String contentType, Charset charset, String fileName) {
        this(name, bytes, contentType, charset, fileName, null);
    }

    public ByteArrayPart(String name, byte[] bytes, String contentType, Charset charset, String fileName, String contentId) {
        this(name, bytes, contentType, charset, fileName, contentId, null);
    }

    public ByteArrayPart(String name, byte[] bytes, String contentType, Charset charset, String fileName, String contentId, String transferEncoding) {
        super(name, contentType, charset, contentId, transferEncoding);
        if (bytes == null)
            throw new NullPointerException("bytes");
        this.bytes = bytes;
        setFileName(fileName);
    }

    @Override
    protected void sendData(OutputStream out) throws IOException {
        out.write(bytes);
    }

    @Override
    protected long getDataLength() {
        return bytes.length;
    }

    public byte[] getBytes() {
        return bytes;
    }

    @Override
    public long write(WritableByteChannel target, byte[] boundary) throws IOException {
        FilePartStallHandler handler = new FilePartStallHandler(getStalledTime(), this);

        try {
            handler.start();

            long length = MultipartUtils.writeBytesToChannel(target, generateFileStart(boundary));
            length += MultipartUtils.writeBytesToChannel(target, bytes);
            length += MultipartUtils.writeBytesToChannel(target, generateFileEnd());

            return length;
        } finally {
            handler.completed();
        }
    }
}