http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public abstract class io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker
  super_class: java.lang.Object
{
  protected static final io.netty.util.internal.logging.InternalLogger logger;
    descriptor: Lio/netty/util/internal/logging/InternalLogger;
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL

  private static final java.nio.channels.ClosedChannelException CLOSED_CHANNEL_EXCEPTION;
    descriptor: Ljava/nio/channels/ClosedChannelException;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private final java.lang.String uri;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.lang.String[] subprotocols;
    descriptor: [Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final io.netty.handler.codec.http.websocketx.WebSocketVersion version;
    descriptor: Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int maxFramePayloadLength;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private java.lang.String selectedSubprotocol;
    descriptor: Ljava/lang/String;
    flags: (0x0002) ACC_PRIVATE

  public static final java.lang.String SUB_PROTOCOL_WILDCARD;
    descriptor: Ljava/lang/String;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    ConstantValue: "*"

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 49
            ldc Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            invokestatic io.netty.util.internal.logging.InternalLoggerFactory.getInstance:(Ljava/lang/Class;)Lio/netty/util/internal/logging/InternalLogger;
            putstatic io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.logger:Lio/netty/util/internal/logging/InternalLogger;
         1: .line 51
            new java.nio.channels.ClosedChannelException
            dup
            invokespecial java.nio.channels.ClosedChannelException.<init>:()V
            ldc Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            ldc "handshake(...)"
         2: .line 50
            invokestatic io.netty.util.internal.ThrowableUtil.unknownStackTrace:(Ljava/lang/Throwable;Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Throwable;
            checkcast java.nio.channels.ClosedChannelException
            putstatic io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.CLOSED_CHANNEL_EXCEPTION:Ljava/nio/channels/ClosedChannelException;
         3: .line 66
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  protected void <init>(io.netty.handler.codec.http.websocketx.WebSocketVersion, java.lang.String, java.lang.String, int);
    descriptor: (Lio/netty/handler/codec/http/websocketx/WebSocketVersion;Ljava/lang/String;Ljava/lang/String;I)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=7, args_size=5
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.handler.codec.http.websocketx.WebSocketVersion version
        start local 2 // java.lang.String uri
        start local 3 // java.lang.String subprotocols
        start local 4 // int maxFramePayloadLength
         0: .line 81
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 84
            aload 0 /* this */
            aload 1 /* version */
            putfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.version:Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
         2: .line 85
            aload 0 /* this */
            aload 2 /* uri */
            putfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.uri:Ljava/lang/String;
         3: .line 86
            aload 3 /* subprotocols */
            ifnull 12
         4: .line 87
            aload 3 /* subprotocols */
            ldc ","
            invokevirtual java.lang.String.split:(Ljava/lang/String;)[Ljava/lang/String;
            astore 5 /* subprotocolArray */
        start local 5 // java.lang.String[] subprotocolArray
         5: .line 88
            iconst_0
            istore 6 /* i */
        start local 6 // int i
         6: goto 9
         7: .line 89
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker io.netty.handler.codec.http.websocketx.WebSocketVersion java.lang.String java.lang.String int java.lang.String[] int
      StackMap stack:
            aload 5 /* subprotocolArray */
            iload 6 /* i */
            aload 5 /* subprotocolArray */
            iload 6 /* i */
            aaload
            invokevirtual java.lang.String.trim:()Ljava/lang/String;
            aastore
         8: .line 88
            iinc 6 /* i */ 1
      StackMap locals:
      StackMap stack:
         9: iload 6 /* i */
            aload 5 /* subprotocolArray */
            arraylength
            if_icmplt 7
        end local 6 // int i
        10: .line 91
            aload 0 /* this */
            aload 5 /* subprotocolArray */
            putfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.subprotocols:[Ljava/lang/String;
        end local 5 // java.lang.String[] subprotocolArray
        11: .line 92
            goto 13
        12: .line 93
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getstatic io.netty.util.internal.EmptyArrays.EMPTY_STRINGS:[Ljava/lang/String;
            putfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.subprotocols:[Ljava/lang/String;
        13: .line 95
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iload 4 /* maxFramePayloadLength */
            putfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.maxFramePayloadLength:I
        14: .line 96
            return
        end local 4 // int maxFramePayloadLength
        end local 3 // java.lang.String subprotocols
        end local 2 // java.lang.String uri
        end local 1 // io.netty.handler.codec.http.websocketx.WebSocketVersion version
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot                   Name  Signature
            0   15     0                   this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0   15     1                version  Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
            0   15     2                    uri  Ljava/lang/String;
            0   15     3           subprotocols  Ljava/lang/String;
            0   15     4  maxFramePayloadLength  I
            5   11     5       subprotocolArray  [Ljava/lang/String;
            6   10     6                      i  I
    MethodParameters:
                       Name  Flags
      version                
      uri                    
      subprotocols           
      maxFramePayloadLength  

  public java.lang.String uri();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
         0: .line 102
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.uri:Ljava/lang/String;
            areturn
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;

  public java.util.Set<java.lang.String> subprotocols();
    descriptor: ()Ljava/util/Set;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
         0: .line 109
            new java.util.LinkedHashSet
            dup
            invokespecial java.util.LinkedHashSet.<init>:()V
            astore 1 /* ret */
        start local 1 // java.util.Set ret
         1: .line 110
            aload 1 /* ret */
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.subprotocols:[Ljava/lang/String;
            invokestatic java.util.Collections.addAll:(Ljava/util/Collection;[Ljava/lang/Object;)Z
            pop
         2: .line 111
            aload 1 /* ret */
            areturn
        end local 1 // java.util.Set ret
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            1    3     1   ret  Ljava/util/Set<Ljava/lang/String;>;
    Signature: ()Ljava/util/Set<Ljava/lang/String;>;

  public io.netty.handler.codec.http.websocketx.WebSocketVersion version();
    descriptor: ()Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
         0: .line 118
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.version:Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
            areturn
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;

  public int maxFramePayloadLength();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
         0: .line 127
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.maxFramePayloadLength:I
            ireturn
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;

  public io.netty.channel.ChannelFuture handshake(io.netty.channel.Channel, io.netty.handler.codec.http.FullHttpRequest);
    descriptor: (Lio/netty/channel/Channel;Lio/netty/handler/codec/http/FullHttpRequest;)Lio/netty/channel/ChannelFuture;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.channel.Channel channel
        start local 2 // io.netty.handler.codec.http.FullHttpRequest req
         0: .line 142
            aload 0 /* this */
            aload 1 /* channel */
            aload 2 /* req */
            aconst_null
            aload 1 /* channel */
            invokeinterface io.netty.channel.Channel.newPromise:()Lio/netty/channel/ChannelPromise;
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.handshake:(Lio/netty/channel/Channel;Lio/netty/handler/codec/http/FullHttpRequest;Lio/netty/handler/codec/http/HttpHeaders;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
            areturn
        end local 2 // io.netty.handler.codec.http.FullHttpRequest req
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0    1     1  channel  Lio/netty/channel/Channel;
            0    1     2      req  Lio/netty/handler/codec/http/FullHttpRequest;
    MethodParameters:
         Name  Flags
      channel  
      req      

  public final io.netty.channel.ChannelFuture handshake(io.netty.channel.Channel, io.netty.handler.codec.http.FullHttpRequest, io.netty.handler.codec.http.HttpHeaders, io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/Channel;Lio/netty/handler/codec/http/FullHttpRequest;Lio/netty/handler/codec/http/HttpHeaders;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=6, locals=9, args_size=5
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.channel.Channel channel
        start local 2 // io.netty.handler.codec.http.FullHttpRequest req
        start local 3 // io.netty.handler.codec.http.HttpHeaders responseHeaders
        start local 4 // io.netty.channel.ChannelPromise promise
         0: .line 164
            getstatic io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.logger:Lio/netty/util/internal/logging/InternalLogger;
            invokeinterface io.netty.util.internal.logging.InternalLogger.isDebugEnabled:()Z
            ifeq 2
         1: .line 165
            getstatic io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.logger:Lio/netty/util/internal/logging/InternalLogger;
            ldc "{} WebSocket version {} server handshake"
            aload 1 /* channel */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.version:()Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
            invokeinterface io.netty.util.internal.logging.InternalLogger.debug:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
         2: .line 167
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 2 /* req */
            aload 3 /* responseHeaders */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.newHandshakeResponse:(Lio/netty/handler/codec/http/FullHttpRequest;Lio/netty/handler/codec/http/HttpHeaders;)Lio/netty/handler/codec/http/FullHttpResponse;
            astore 5 /* response */
        start local 5 // io.netty.handler.codec.http.FullHttpResponse response
         3: .line 168
            aload 1 /* channel */
            invokeinterface io.netty.channel.Channel.pipeline:()Lio/netty/channel/ChannelPipeline;
            astore 6 /* p */
        start local 6 // io.netty.channel.ChannelPipeline p
         4: .line 169
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpObjectAggregator;
            invokeinterface io.netty.channel.ChannelPipeline.get:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandler;
            ifnull 6
         5: .line 170
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpObjectAggregator;
            invokeinterface io.netty.channel.ChannelPipeline.remove:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandler;
            pop
         6: .line 172
      StackMap locals: io.netty.handler.codec.http.FullHttpResponse io.netty.channel.ChannelPipeline
      StackMap stack:
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpContentCompressor;
            invokeinterface io.netty.channel.ChannelPipeline.get:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandler;
            ifnull 8
         7: .line 173
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpContentCompressor;
            invokeinterface io.netty.channel.ChannelPipeline.remove:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandler;
            pop
         8: .line 175
      StackMap locals:
      StackMap stack:
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpRequestDecoder;
            invokeinterface io.netty.channel.ChannelPipeline.context:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandlerContext;
            astore 7 /* ctx */
        start local 7 // io.netty.channel.ChannelHandlerContext ctx
         9: .line 177
            aload 7 /* ctx */
            ifnonnull 20
        10: .line 179
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpServerCodec;
            invokeinterface io.netty.channel.ChannelPipeline.context:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandlerContext;
            astore 7 /* ctx */
        11: .line 180
            aload 7 /* ctx */
            ifnonnull 16
        12: .line 181
            aload 4 /* promise */
        13: .line 182
            new java.lang.IllegalStateException
            dup
            ldc "No HttpDecoder and no HttpServerCodec in the pipeline"
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
        14: .line 181
            invokeinterface io.netty.channel.ChannelPromise.setFailure:(Ljava/lang/Throwable;)Lio/netty/channel/ChannelPromise;
            pop
        15: .line 183
            aload 4 /* promise */
            areturn
        16: .line 185
      StackMap locals: io.netty.channel.ChannelHandlerContext
      StackMap stack:
            aload 6 /* p */
            aload 7 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.name:()Ljava/lang/String;
            ldc "wsdecoder"
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.newWebsocketDecoder:()Lio/netty/handler/codec/http/websocketx/WebSocketFrameDecoder;
            invokeinterface io.netty.channel.ChannelPipeline.addBefore:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
        17: .line 186
            aload 6 /* p */
            aload 7 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.name:()Ljava/lang/String;
            ldc "wsencoder"
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.newWebSocketEncoder:()Lio/netty/handler/codec/http/websocketx/WebSocketFrameEncoder;
            invokeinterface io.netty.channel.ChannelPipeline.addBefore:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
        18: .line 187
            aload 7 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.name:()Ljava/lang/String;
            astore 8 /* encoderName */
        start local 8 // java.lang.String encoderName
        19: .line 188
            goto 23
        end local 8 // java.lang.String encoderName
        20: .line 189
      StackMap locals:
      StackMap stack:
            aload 6 /* p */
            aload 7 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.name:()Ljava/lang/String;
            ldc "wsdecoder"
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.newWebsocketDecoder:()Lio/netty/handler/codec/http/websocketx/WebSocketFrameDecoder;
            invokeinterface io.netty.channel.ChannelPipeline.replace:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelHandler;
            pop
        21: .line 191
            aload 6 /* p */
            ldc Lio/netty/handler/codec/http/HttpResponseEncoder;
            invokeinterface io.netty.channel.ChannelPipeline.context:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandlerContext;
            invokeinterface io.netty.channel.ChannelHandlerContext.name:()Ljava/lang/String;
            astore 8 /* encoderName */
        start local 8 // java.lang.String encoderName
        22: .line 192
            aload 6 /* p */
            aload 8 /* encoderName */
            ldc "wsencoder"
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.newWebSocketEncoder:()Lio/netty/handler/codec/http/websocketx/WebSocketFrameEncoder;
            invokeinterface io.netty.channel.ChannelPipeline.addBefore:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
        23: .line 194
      StackMap locals: java.lang.String
      StackMap stack:
            aload 1 /* channel */
            aload 5 /* response */
            invokeinterface io.netty.channel.Channel.writeAndFlush:(Ljava/lang/Object;)Lio/netty/channel/ChannelFuture;
            new io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$1
            dup
            aload 0 /* this */
            aload 8 /* encoderName */
            aload 4 /* promise */
            invokespecial io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$1.<init>:(Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;Ljava/lang/String;Lio/netty/channel/ChannelPromise;)V
            invokeinterface io.netty.channel.ChannelFuture.addListener:(Lio/netty/util/concurrent/GenericFutureListener;)Lio/netty/channel/ChannelFuture;
            pop
        24: .line 206
            aload 4 /* promise */
            areturn
        end local 8 // java.lang.String encoderName
        end local 7 // io.netty.channel.ChannelHandlerContext ctx
        end local 6 // io.netty.channel.ChannelPipeline p
        end local 5 // io.netty.handler.codec.http.FullHttpResponse response
        end local 4 // io.netty.channel.ChannelPromise promise
        end local 3 // io.netty.handler.codec.http.HttpHeaders responseHeaders
        end local 2 // io.netty.handler.codec.http.FullHttpRequest req
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   25     0             this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0   25     1          channel  Lio/netty/channel/Channel;
            0   25     2              req  Lio/netty/handler/codec/http/FullHttpRequest;
            0   25     3  responseHeaders  Lio/netty/handler/codec/http/HttpHeaders;
            0   25     4          promise  Lio/netty/channel/ChannelPromise;
            3   25     5         response  Lio/netty/handler/codec/http/FullHttpResponse;
            4   25     6                p  Lio/netty/channel/ChannelPipeline;
            9   25     7              ctx  Lio/netty/channel/ChannelHandlerContext;
           19   20     8      encoderName  Ljava/lang/String;
           22   25     8      encoderName  Ljava/lang/String;
    MethodParameters:
                 Name  Flags
      channel          
      req              
      responseHeaders  
      promise          final

  public io.netty.channel.ChannelFuture handshake(io.netty.channel.Channel, io.netty.handler.codec.http.HttpRequest);
    descriptor: (Lio/netty/channel/Channel;Lio/netty/handler/codec/http/HttpRequest;)Lio/netty/channel/ChannelFuture;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.channel.Channel channel
        start local 2 // io.netty.handler.codec.http.HttpRequest req
         0: .line 221
            aload 0 /* this */
            aload 1 /* channel */
            aload 2 /* req */
            aconst_null
            aload 1 /* channel */
            invokeinterface io.netty.channel.Channel.newPromise:()Lio/netty/channel/ChannelPromise;
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.handshake:(Lio/netty/channel/Channel;Lio/netty/handler/codec/http/HttpRequest;Lio/netty/handler/codec/http/HttpHeaders;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
            areturn
        end local 2 // io.netty.handler.codec.http.HttpRequest req
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    1     0     this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0    1     1  channel  Lio/netty/channel/Channel;
            0    1     2      req  Lio/netty/handler/codec/http/HttpRequest;
    MethodParameters:
         Name  Flags
      channel  
      req      

  public final io.netty.channel.ChannelFuture handshake(io.netty.channel.Channel, io.netty.handler.codec.http.HttpRequest, io.netty.handler.codec.http.HttpHeaders, io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/Channel;Lio/netty/handler/codec/http/HttpRequest;Lio/netty/handler/codec/http/HttpHeaders;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
    flags: (0x0011) ACC_PUBLIC, ACC_FINAL
    Code:
      stack=9, locals=9, args_size=5
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.channel.Channel channel
        start local 2 // io.netty.handler.codec.http.HttpRequest req
        start local 3 // io.netty.handler.codec.http.HttpHeaders responseHeaders
        start local 4 // io.netty.channel.ChannelPromise promise
         0: .line 243
            aload 2 /* req */
            instanceof io.netty.handler.codec.http.FullHttpRequest
            ifeq 2
         1: .line 244
            aload 0 /* this */
            aload 1 /* channel */
            aload 2 /* req */
            checkcast io.netty.handler.codec.http.FullHttpRequest
            aload 3 /* responseHeaders */
            aload 4 /* promise */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.handshake:(Lio/netty/channel/Channel;Lio/netty/handler/codec/http/FullHttpRequest;Lio/netty/handler/codec/http/HttpHeaders;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
            areturn
         2: .line 246
      StackMap locals:
      StackMap stack:
            getstatic io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.logger:Lio/netty/util/internal/logging/InternalLogger;
            invokeinterface io.netty.util.internal.logging.InternalLogger.isDebugEnabled:()Z
            ifeq 4
         3: .line 247
            getstatic io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.logger:Lio/netty/util/internal/logging/InternalLogger;
            ldc "{} WebSocket version {} server handshake"
            aload 1 /* channel */
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.version:()Lio/netty/handler/codec/http/websocketx/WebSocketVersion;
            invokeinterface io.netty.util.internal.logging.InternalLogger.debug:(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V
         4: .line 249
      StackMap locals:
      StackMap stack:
            aload 1 /* channel */
            invokeinterface io.netty.channel.Channel.pipeline:()Lio/netty/channel/ChannelPipeline;
            astore 5 /* p */
        start local 5 // io.netty.channel.ChannelPipeline p
         5: .line 250
            aload 5 /* p */
            ldc Lio/netty/handler/codec/http/HttpRequestDecoder;
            invokeinterface io.netty.channel.ChannelPipeline.context:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandlerContext;
            astore 6 /* ctx */
        start local 6 // io.netty.channel.ChannelHandlerContext ctx
         6: .line 251
            aload 6 /* ctx */
            ifnonnull 13
         7: .line 253
            aload 5 /* p */
            ldc Lio/netty/handler/codec/http/HttpServerCodec;
            invokeinterface io.netty.channel.ChannelPipeline.context:(Ljava/lang/Class;)Lio/netty/channel/ChannelHandlerContext;
            astore 6 /* ctx */
         8: .line 254
            aload 6 /* ctx */
            ifnonnull 13
         9: .line 255
            aload 4 /* promise */
        10: .line 256
            new java.lang.IllegalStateException
            dup
            ldc "No HttpDecoder and no HttpServerCodec in the pipeline"
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
        11: .line 255
            invokeinterface io.netty.channel.ChannelPromise.setFailure:(Ljava/lang/Throwable;)Lio/netty/channel/ChannelPromise;
            pop
        12: .line 257
            aload 4 /* promise */
            areturn
        13: .line 264
      StackMap locals: io.netty.channel.ChannelPipeline io.netty.channel.ChannelHandlerContext
      StackMap stack:
            ldc "httpAggregator"
            astore 7 /* aggregatorName */
        start local 7 // java.lang.String aggregatorName
        14: .line 265
            aload 5 /* p */
            aload 6 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.name:()Ljava/lang/String;
            aload 7 /* aggregatorName */
            new io.netty.handler.codec.http.HttpObjectAggregator
            dup
            sipush 8192
            invokespecial io.netty.handler.codec.http.HttpObjectAggregator.<init>:(I)V
            invokeinterface io.netty.channel.ChannelPipeline.addAfter:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
        15: .line 266
            aload 5 /* p */
            aload 7 /* aggregatorName */
            ldc "handshaker"
            new io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$2
            dup
            aload 0 /* this */
            aload 1 /* channel */
            aload 3 /* responseHeaders */
            aload 4 /* promise */
            invokespecial io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$2.<init>:(Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;Lio/netty/channel/Channel;Lio/netty/handler/codec/http/HttpHeaders;Lio/netty/channel/ChannelPromise;)V
            invokeinterface io.netty.channel.ChannelPipeline.addAfter:(Ljava/lang/String;Ljava/lang/String;Lio/netty/channel/ChannelHandler;)Lio/netty/channel/ChannelPipeline;
            pop
        16: .line 290
            aload 6 /* ctx */
            aload 2 /* req */
            invokestatic io.netty.util.ReferenceCountUtil.retain:(Ljava/lang/Object;)Ljava/lang/Object;
            invokeinterface io.netty.channel.ChannelHandlerContext.fireChannelRead:(Ljava/lang/Object;)Lio/netty/channel/ChannelHandlerContext;
            pop
        17: .line 291
            goto 20
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker io.netty.channel.Channel io.netty.handler.codec.http.HttpRequest io.netty.handler.codec.http.HttpHeaders io.netty.channel.ChannelPromise io.netty.channel.ChannelPipeline io.netty.channel.ChannelHandlerContext java.lang.String
      StackMap stack: java.lang.Throwable
        18: astore 8 /* cause */
        start local 8 // java.lang.Throwable cause
        19: .line 292
            aload 4 /* promise */
            aload 8 /* cause */
            invokeinterface io.netty.channel.ChannelPromise.setFailure:(Ljava/lang/Throwable;)Lio/netty/channel/ChannelPromise;
            pop
        end local 8 // java.lang.Throwable cause
        20: .line 294
      StackMap locals:
      StackMap stack:
            aload 4 /* promise */
            areturn
        end local 7 // java.lang.String aggregatorName
        end local 6 // io.netty.channel.ChannelHandlerContext ctx
        end local 5 // io.netty.channel.ChannelPipeline p
        end local 4 // io.netty.channel.ChannelPromise promise
        end local 3 // io.netty.handler.codec.http.HttpHeaders responseHeaders
        end local 2 // io.netty.handler.codec.http.HttpRequest req
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0   21     0             this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0   21     1          channel  Lio/netty/channel/Channel;
            0   21     2              req  Lio/netty/handler/codec/http/HttpRequest;
            0   21     3  responseHeaders  Lio/netty/handler/codec/http/HttpHeaders;
            0   21     4          promise  Lio/netty/channel/ChannelPromise;
            5   21     5                p  Lio/netty/channel/ChannelPipeline;
            6   21     6              ctx  Lio/netty/channel/ChannelHandlerContext;
           14   21     7   aggregatorName  Ljava/lang/String;
           19   20     8            cause  Ljava/lang/Throwable;
      Exception table:
        from    to  target  type
          16    17      18  Class java.lang.Throwable
    MethodParameters:
                 Name  Flags
      channel          final
      req              
      responseHeaders  final
      promise          final

  protected abstract io.netty.handler.codec.http.FullHttpResponse newHandshakeResponse(io.netty.handler.codec.http.FullHttpRequest, io.netty.handler.codec.http.HttpHeaders);
    descriptor: (Lio/netty/handler/codec/http/FullHttpRequest;Lio/netty/handler/codec/http/HttpHeaders;)Lio/netty/handler/codec/http/FullHttpResponse;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
    MethodParameters:
                 Name  Flags
      req              
      responseHeaders  

  public io.netty.channel.ChannelFuture close(io.netty.channel.Channel, io.netty.handler.codec.http.websocketx.CloseWebSocketFrame);
    descriptor: (Lio/netty/channel/Channel;Lio/netty/handler/codec/http/websocketx/CloseWebSocketFrame;)Lio/netty/channel/ChannelFuture;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.channel.Channel channel
        start local 2 // io.netty.handler.codec.http.websocketx.CloseWebSocketFrame frame
         0: .line 311
            aload 1 /* channel */
            ifnonnull 2
         1: .line 312
            new java.lang.NullPointerException
            dup
            ldc "channel"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 314
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* channel */
            aload 2 /* frame */
            aload 1 /* channel */
            invokeinterface io.netty.channel.Channel.newPromise:()Lio/netty/channel/ChannelPromise;
            invokevirtual io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.close:(Lio/netty/channel/Channel;Lio/netty/handler/codec/http/websocketx/CloseWebSocketFrame;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
            areturn
        end local 2 // io.netty.handler.codec.http.websocketx.CloseWebSocketFrame frame
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0    3     1  channel  Lio/netty/channel/Channel;
            0    3     2    frame  Lio/netty/handler/codec/http/websocketx/CloseWebSocketFrame;
    MethodParameters:
         Name  Flags
      channel  
      frame    

  public io.netty.channel.ChannelFuture close(io.netty.channel.Channel, io.netty.handler.codec.http.websocketx.CloseWebSocketFrame, io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/Channel;Lio/netty/handler/codec/http/websocketx/CloseWebSocketFrame;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=4
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // io.netty.channel.Channel channel
        start local 2 // io.netty.handler.codec.http.websocketx.CloseWebSocketFrame frame
        start local 3 // io.netty.channel.ChannelPromise promise
         0: .line 328
            aload 1 /* channel */
            ifnonnull 2
         1: .line 329
            new java.lang.NullPointerException
            dup
            ldc "channel"
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 331
      StackMap locals:
      StackMap stack:
            aload 1 /* channel */
            aload 2 /* frame */
            aload 3 /* promise */
            invokeinterface io.netty.channel.Channel.writeAndFlush:(Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)Lio/netty/channel/ChannelFuture;
            getstatic io.netty.channel.ChannelFutureListener.CLOSE:Lio/netty/channel/ChannelFutureListener;
            invokeinterface io.netty.channel.ChannelFuture.addListener:(Lio/netty/util/concurrent/GenericFutureListener;)Lio/netty/channel/ChannelFuture;
            areturn
        end local 3 // io.netty.channel.ChannelPromise promise
        end local 2 // io.netty.handler.codec.http.websocketx.CloseWebSocketFrame frame
        end local 1 // io.netty.channel.Channel channel
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0    3     1  channel  Lio/netty/channel/Channel;
            0    3     2    frame  Lio/netty/handler/codec/http/websocketx/CloseWebSocketFrame;
            0    3     3  promise  Lio/netty/channel/ChannelPromise;
    MethodParameters:
         Name  Flags
      channel  
      frame    
      promise  

  protected java.lang.String selectSubprotocol(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=12, args_size=2
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
        start local 1 // java.lang.String requestedSubprotocols
         0: .line 342
            aload 1 /* requestedSubprotocols */
            ifnull 1
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.subprotocols:[Ljava/lang/String;
            arraylength
            ifne 2
         1: .line 343
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
         2: .line 346
      StackMap locals:
      StackMap stack:
            aload 1 /* requestedSubprotocols */
            ldc ","
            invokevirtual java.lang.String.split:(Ljava/lang/String;)[Ljava/lang/String;
            astore 2 /* requestedSubprotocolArray */
        start local 2 // java.lang.String[] requestedSubprotocolArray
         3: .line 347
            aload 2 /* requestedSubprotocolArray */
            dup
            astore 6
            arraylength
            istore 5
            iconst_0
            istore 4
            goto 15
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker java.lang.String java.lang.String[] top int int java.lang.String[]
      StackMap stack:
         4: aload 6
            iload 4
            aaload
            astore 3 /* p */
        start local 3 // java.lang.String p
         5: .line 348
            aload 3 /* p */
            invokevirtual java.lang.String.trim:()Ljava/lang/String;
            astore 7 /* requestedSubprotocol */
        start local 7 // java.lang.String requestedSubprotocol
         6: .line 350
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.subprotocols:[Ljava/lang/String;
            dup
            astore 11
            arraylength
            istore 10
            iconst_0
            istore 9
            goto 13
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker java.lang.String java.lang.String[] java.lang.String int int java.lang.String[] java.lang.String top int int java.lang.String[]
      StackMap stack:
         7: aload 11
            iload 9
            aaload
            astore 8 /* supportedSubprotocol */
        start local 8 // java.lang.String supportedSubprotocol
         8: .line 351
            ldc "*"
            aload 8 /* supportedSubprotocol */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 10
         9: .line 352
            aload 7 /* requestedSubprotocol */
            aload 8 /* supportedSubprotocol */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 12
        10: .line 353
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker java.lang.String java.lang.String[] java.lang.String int int java.lang.String[] java.lang.String java.lang.String int int java.lang.String[]
      StackMap stack:
            aload 0 /* this */
            aload 7 /* requestedSubprotocol */
            putfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.selectedSubprotocol:Ljava/lang/String;
        11: .line 354
            aload 7 /* requestedSubprotocol */
            areturn
        end local 8 // java.lang.String supportedSubprotocol
        12: .line 350
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker java.lang.String java.lang.String[] java.lang.String int int java.lang.String[] java.lang.String top int int java.lang.String[]
      StackMap stack:
            iinc 9 1
      StackMap locals:
      StackMap stack:
        13: iload 9
            iload 10
            if_icmplt 7
        end local 7 // java.lang.String requestedSubprotocol
        end local 3 // java.lang.String p
        14: .line 347
            iinc 4 1
      StackMap locals: io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker java.lang.String java.lang.String[] top int int java.lang.String[]
      StackMap stack:
        15: iload 4
            iload 5
            if_icmplt 4
        16: .line 360
            aconst_null
            areturn
        end local 2 // java.lang.String[] requestedSubprotocolArray
        end local 1 // java.lang.String requestedSubprotocols
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot                       Name  Signature
            0   17     0                       this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;
            0   17     1      requestedSubprotocols  Ljava/lang/String;
            3   17     2  requestedSubprotocolArray  [Ljava/lang/String;
            5   14     3                          p  Ljava/lang/String;
            6   14     7       requestedSubprotocol  Ljava/lang/String;
            8   12     8       supportedSubprotocol  Ljava/lang/String;
    MethodParameters:
                       Name  Flags
      requestedSubprotocols  

  public java.lang.String selectedSubprotocol();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
         0: .line 370
            aload 0 /* this */
            getfield io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.selectedSubprotocol:Ljava/lang/String;
            areturn
        end local 0 // io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/handler/codec/http/websocketx/WebSocketServerHandshaker;

  protected abstract io.netty.handler.codec.http.websocketx.WebSocketFrameDecoder newWebsocketDecoder();
    descriptor: ()Lio/netty/handler/codec/http/websocketx/WebSocketFrameDecoder;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT

  protected abstract io.netty.handler.codec.http.websocketx.WebSocketFrameEncoder newWebSocketEncoder();
    descriptor: ()Lio/netty/handler/codec/http/websocketx/WebSocketFrameEncoder;
    flags: (0x0404) ACC_PROTECTED, ACC_ABSTRACT
}
SourceFile: "WebSocketServerHandshaker.java"
NestMembers:
  io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$1  io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$2
InnerClasses:
  io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$1
  io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker$2