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Java example source code file (HttpUploadClientHandler.java)

This example Java source code file (HttpUploadClientHandler.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

charsequence, httpcontent, httpobject, httpresponse, httpuploadclienthandler, lasthttpcontent, override, simplechannelinboundhandler, throwable

The HttpUploadClientHandler.java Java example source code

/*
 * 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.example.http.upload;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpUtil;
import io.netty.handler.codec.http.HttpObject;
import io.netty.handler.codec.http.HttpResponse;
import io.netty.handler.codec.http.LastHttpContent;
import io.netty.util.CharsetUtil;

/**
 * Handler that just dumps the contents of the response from the server
 */
public class HttpUploadClientHandler extends SimpleChannelInboundHandler<HttpObject> {

    private boolean readingChunks;

    @Override
    public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) {
        if (msg instanceof HttpResponse) {
            HttpResponse response = (HttpResponse) msg;

            System.err.println("STATUS: " + response.status());
            System.err.println("VERSION: " + response.protocolVersion());

            if (!response.headers().isEmpty()) {
                for (CharSequence name : response.headers().names()) {
                    for (CharSequence value : response.headers().getAll(name)) {
                        System.err.println("HEADER: " + name + " = " + value);
                    }
                }
            }

            if (response.status().code() == 200 && HttpUtil.isTransferEncodingChunked(response)) {
                readingChunks = true;
                System.err.println("CHUNKED CONTENT {");
            } else {
                System.err.println("CONTENT {");
            }
        }
        if (msg instanceof HttpContent) {
            HttpContent chunk = (HttpContent) msg;
            System.err.println(chunk.content().toString(CharsetUtil.UTF_8));

            if (chunk instanceof LastHttpContent) {
                if (readingChunks) {
                    System.err.println("} END OF CHUNKED CONTENT");
                } else {
                    System.err.println("} END OF CONTENT");
                }
                readingChunks = false;
            } else {
                System.err.println(chunk.content().toString(CharsetUtil.UTF_8));
            }
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
        ctx.channel().close();
    }
}

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