content: package com.platform.rpc.remoting.net.impl.netty_http.client;
  
  import com.platform.rpc.remoting.invoker.XxlRpcInvokerFactory;
  import com.platform.rpc.remoting.net.common.ConnectClient;
  import com.platform.rpc.remoting.net.common.NettyConstant;
  import com.platform.rpc.remoting.net.params.Beat;
  import com.platform.rpc.remoting.net.params.XxlRpcRequest;
  import com.platform.rpc.serialize.Serializer;
  import io.netty.bootstrap.Bootstrap;
  import io.netty.buffer.Unpooled;
  import io.netty.channel.Channel;
  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.NioSocketChannel;
  import io.netty.handler.codec.http.*;
  import io.netty.handler.timeout.IdleStateHandler;
  
  import java.net.URI;
  import java.net.URL;
  import java.util.concurrent.TimeUnit;
  
  /**
   * netty_http
   */
  public class NettyHttpConnectClient extends ConnectClient {
  
      private EventLoopGroup group;
      private Channel channel;
  
      private Serializer serializer;
      private String address;
      private String host;
      private DefaultFullHttpRequest beatRequest;
  
      @Override
      public void init(String address, final Serializer serializer, final XxlRpcInvokerFactory xxlRpcInvokerFactory) throws Exception {
          final NettyHttpConnectClient thisClient = this;
  
          if (!address.toLowerCase().startsWith("http")) {
              address = "http://" + address;    // IP:PORT, need parse to url
          }
  
          this.address = address;
          URL url = new URL(address);
          this.host = url.getHost();
          int port = url.getPort() > -1 ? url.getPort() : 80;
  
  
          this.group = new NioEventLoopGroup();
          Bootstrap bootstrap = new Bootstrap();
          bootstrap.group(group)
                  .channel(NioSocketChannel.class)
                  .handler(new ChannelInitializer<SocketChannel>() {
                      @Override
                      public void initChannel(SocketChannel channel) throws Exception {
                          channel.pipeline()
                                  .addLast(new IdleStateHandler(0, 0, Beat.BEAT_INTERVAL, TimeUnit.SECONDS))   // beat N, close if fail
                                  .addLast(new HttpClientCodec())
                                  .addLast(new HttpObjectAggregator(NettyConstant.MAX_LENGTH))
                                  .addLast(new NettyHttpClientHandler(xxlRpcInvokerFactory, serializer, thisClient));
                      }
                  })
                  .option(ChannelOption.SO_KEEPALIVE, true)
                  .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000);
          this.channel = bootstrap.connect(host, port).sync().channel();
  
          this.serializer = serializer;
  
          // valid
          if (!isValidate()) {
              close();
              return;
          }
  
          logger.debug(">>>>>>>>>>> xxl-rpc netty client proxy, connect to server success at host:{}, port:{}", host, port);
      }
  
      @Override
      public boolean isValidate() {
          if (this.channel != null) {
              return this.channel.isActive();
          }
          return false;
      }
  
  
      @Override
      public void close() {
          if (this.channel != null && this.channel.isActive()) {
              this.channel.close();        // if this.channel.isOpen()
          }
          if (this.group != null && !this.group.isShutdown()) {
              this.group.shutdownGracefully();
          }
          logger.debug(">>>>>>>>>>> xxl-rpc netty client close.");
      }
  
  
      @Override
      public void send(XxlRpcRequest xxlRpcRequest) throws Exception {
          byte[] requestBytes = serializer.serialize(xxlRpcRequest);
  
          DefaultFullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.POST, new URI(address).getRawPath(), Unpooled.wrappedBuffer(requestBytes));
          request.headers().set(HttpHeaderNames.HOST, host);
          request.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE);
          request.headers().set(HttpHeaderNames.CONTENT_LENGTH, request.content().readableBytes());
  
          this.channel.writeAndFlush(request).sync();
      }
  
  }
  