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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2014 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;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.stream.ChunkedInput;

/**
 * A {@link ChunkedInput} that fetches data chunk by chunk for use with HTTP chunked transfers.
 * 
 * Each chunk from the input data will be wrapped within a {@link HttpContent}. At the end of the input data,
 * {@link LastHttpContent} will be written.
 * 

 * Ensure that your HTTP response header contains {@code Transfer-Encoding: chunked}.
 * 

 * 
 * public void messageReceived(ChannelHandlerContext ctx, FullHttpRequest request) throws Exception {
 *     HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
 *     response.headers().set(TRANSFER_ENCODING, CHUNKED);
 *     ctx.write(response);
 *
 *     HttpContentChunkedInput httpChunkWriter = new HttpChunkedInput(
 *         new ChunkedFile("/tmp/myfile.txt"));
 *     ChannelFuture sendFileFuture = ctx.write(httpChunkWriter);
 * }
 * 
 */
public class HttpChunkedInput implements ChunkedInput {

    private final ChunkedInput input;
    private final LastHttpContent lastHttpContent;
    private boolean sentLastChunk;

    /**
     * Creates a new instance using the specified input.
     * @param input {@link ChunkedInput} containing data to write
     */
    public HttpChunkedInput(ChunkedInput input) {
        this.input = input;
        lastHttpContent = LastHttpContent.EMPTY_LAST_CONTENT;
    }

    /**
     * Creates a new instance using the specified input. {@code lastHttpContent} will be written as the terminating
     * chunk.
     * @param input {@link ChunkedInput} containing data to write
     * @param lastHttpContent {@link LastHttpContent} that will be written as the terminating chunk. Use this for
     *            training headers.
     */
    public HttpChunkedInput(ChunkedInput input, LastHttpContent lastHttpContent) {
        this.input = input;
        this.lastHttpContent = lastHttpContent;
    }

    @Override
    public boolean isEndOfInput() throws Exception {
        if (input.isEndOfInput()) {
            // Only end of input after last HTTP chunk has been sent
            return sentLastChunk;
        } else {
            return false;
        }
    }

    @Override
    public void close() throws Exception {
        input.close();
    }

    @Override
    public HttpContent readChunk(ChannelHandlerContext ctx) throws Exception {
        if (input.isEndOfInput()) {
            if (sentLastChunk) {
                return null;
            } else {
                // Send last chunk for this input
                sentLastChunk = true;
                return lastHttpContent;
            }
        } else {
            ByteBuf buf = input.readChunk(ctx);
            return new DefaultHttpContent(buf);
        }
    }
}