unsupported message type: DefaultFullHttpResponse (expected: ByteBuf, FileRegion) 原因以及解决办法

使用netty做http服务器的时候 用android链接 会出现这个错误

原因是http-aggregator顺序有问题

(ps:目前大部分国内博客都是这个排序有点坑爹):

官方文档说明:For convenience, consider putting a HttpServerCodec before the HttpObjectAggregator as it functions as both a HttpRequestDecoder and a HttpResponseEncoder.

package com.sencorsta.ids.httptest;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.stream.ChunkedWriteHandler;

/**
* Created by apple on 17/10/21.
*/
public class HttpServer {

public static void start(final int port) throws Exception {
EventLoopGroup boss = new NioEventLoopGroup();
EventLoopGroup woker = new NioEventLoopGroup();
ServerBootstrap serverBootstrap = new ServerBootstrap();
HttpServerHandler httpServerHandler=new HttpServerHandler();
try {

serverBootstrap.channel(NioServerSocketChannel.class).group(boss, woker)
.childOption(ChannelOption.SO_KEEPALIVE, true).option(ChannelOption.SO_BACKLOG, 1024)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ch.pipeline().addLast("http-decoder", new HttpRequestDecoder());
ch.pipeline().addLast("http-aggregator", new HttpObjectAggregator(65536));//这里的位置有问题
ch.pipeline().addLast("http-encoder", new HttpResponseEncoder());
ch.pipeline().addLast("http-chunked", new ChunkedWriteHandler());
ch.pipeline().addLast(httpServerHandler);
}
});

ChannelFuture future = serverBootstrap.bind(port).sync();
future.channel().closeFuture().sync();
} finally {
boss.shutdownGracefully();
woker.shutdownGracefully();
}
}

public static void main(String[] args) throws Exception {
start(8080);
}
}
把上面的ch.pipeline().addLast("http-aggregator", new HttpObjectAggregator(65536));这一行

放到coder下面就可以了

package com.sencorsta.ids.httptest;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.stream.ChunkedWriteHandler;

/**
* Created by apple on 17/10/21.
*/
public class HttpServer {

public static void start(final int port) throws Exception {
EventLoopGroup boss = new NioEventLoopGroup();
EventLoopGroup woker = new NioEventLoopGroup();
ServerBootstrap serverBootstrap = new ServerBootstrap();
HttpServerHandler httpServerHandler=new HttpServerHandler();
try {

serverBootstrap.channel(NioServerSocketChannel.class).group(boss, woker)
.childOption(ChannelOption.SO_KEEPALIVE, true).option(ChannelOption.SO_BACKLOG, 1024)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ch.pipeline().addLast("http-decoder", new HttpRequestDecoder());
ch.pipeline().addLast("http-encoder", new HttpResponseEncoder());
ch.pipeline().addLast("http-aggregator", new HttpObjectAggregator(65536));
ch.pipeline().addLast("http-chunked", new ChunkedWriteHandler());
ch.pipeline().addLast(httpServerHandler);
}
});

ChannelFuture future = serverBootstrap.bind(port).sync();
future.channel().closeFuture().sync();
} finally {
boss.shutdownGracefully();
woker.shutdownGracefully();
}
}

public static void main(String[] args) throws Exception {
start(8080);
}
}
参考资料:官方说明