Java tutorial
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In no event and under no legal theory, * whether in tort (including negligence), contract, or otherwise, * unless required by applicable law (such as deliberate and grossly * negligent acts) or agreed to in writing, shall any Contributor be * liable to You for damages, including any direct, indirect, special, * incidental, or consequential damages of any character arising as a * result of this License or out of the use or inability to use the * Work (including but not limited to damages for loss of goodwill, * work stoppage, computer failure or malfunction, or any and all * other commercial damages or losses), even if such Contributor * has been advised of the possibility of such damages. * * 9. Accepting Warranty or Additional Liability. While redistributing * the Work or Derivative Works thereof, You may choose to offer, * and charge a fee for, acceptance of support, warranty, indemnity, * or other liability obligations and/or rights consistent with this * License. However, in accepting such obligations, You may act only * on Your own behalf and on Your sole responsibility, not on behalf * of any other Contributor, and only if You agree to indemnify, * defend, and hold each Contributor harmless for any liability * incurred by, or claims asserted against, such Contributor by reason * of your accepting any such warranty or additional liability. * * END OF TERMS AND CONDITIONS * * * Copyright (c) Bug 2016. * * */ package cn.scujcc.bug.bitcoinplatformandroid.util.socket.websocket; import java.io.IOException; import java.util.zip.DataFormatException; import java.util.zip.Inflater; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufInputStream; import io.netty.channel.Channel; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelPromise; import io.netty.channel.SimpleChannelInboundHandler; import io.netty.handler.codec.http.FullHttpResponse; import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame; import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame; import io.netty.handler.codec.http.websocketx.PongWebSocketFrame; import io.netty.handler.codec.http.websocketx.TextWebSocketFrame; import io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker; import io.netty.handler.codec.http.websocketx.WebSocketFrame; import io.netty.util.CharsetUtil; public class WebSocketClientHandler extends SimpleChannelInboundHandler<Object> { private final WebSocketClientHandshaker handshaker; private ChannelPromise handshakeFuture; private MoniterTask moniter; private WebSocketService service; public WebSocketClientHandler(WebSocketClientHandshaker handshaker, WebSocketService service, MoniterTask moniter) { this.handshaker = handshaker; this.service = service; this.moniter = moniter; } public ChannelFuture handshakeFuture() { return handshakeFuture; } @Override public void handlerAdded(ChannelHandlerContext ctx) { handshakeFuture = ctx.newPromise(); } @Override public void channelActive(ChannelHandlerContext ctx) { handshaker.handshake(ctx.channel()); } @Override public void channelInactive(ChannelHandlerContext ctx) { System.out.println("WebSocket Client disconnected!"); } @Override public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception { Channel ch = ctx.channel(); moniter.updateTime(); if (!handshaker.isHandshakeComplete()) { handshaker.finishHandshake(ch, (FullHttpResponse) msg); System.out.println("WebSocket Client connected!"); handshakeFuture.setSuccess(); return; } if (msg instanceof FullHttpResponse) { FullHttpResponse response = (FullHttpResponse) msg; throw new IllegalStateException("Unexpected FullHttpResponse (getStatus=" + response.getStatus() + ", content=" + response.content().toString(CharsetUtil.UTF_8) + ')'); } WebSocketFrame frame = (WebSocketFrame) msg; if (frame instanceof TextWebSocketFrame) { TextWebSocketFrame textFrame = (TextWebSocketFrame) frame; service.onReceive(textFrame.text()); } else if (frame instanceof BinaryWebSocketFrame) { BinaryWebSocketFrame binaryFrame = (BinaryWebSocketFrame) frame; service.onReceive(decodeByteBuff(binaryFrame.content())); } else if (frame instanceof PongWebSocketFrame) { System.out.println("WebSocket Client received pong"); } else if (frame instanceof CloseWebSocketFrame) { System.out.println("WebSocket Client received closing"); ch.close(); } } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { cause.printStackTrace(); if (!handshakeFuture.isDone()) { handshakeFuture.setFailure(cause); } ctx.close(); } public String decodeByteBuff(ByteBuf buf) throws IOException, DataFormatException { byte[] temp = new byte[buf.readableBytes()]; ByteBufInputStream bis = new ByteBufInputStream(buf); bis.read(temp); bis.close(); Inflater decompresser = new Inflater(true); decompresser.setInput(temp, 0, temp.length); StringBuilder sb = new StringBuilder(); byte[] result = new byte[1024]; while (!decompresser.finished()) { int resultLength = decompresser.inflate(result); sb.append(new String(result, 0, resultLength, "UTF-8")); } decompresser.end(); return sb.toString(); } }