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 class io.netty.handler.codec.http.HttpServerKeepAliveHandler extends io.netty.channel.ChannelDuplexHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.handler.codec.http.HttpServerKeepAliveHandler
  super_class: io.netty.channel.ChannelDuplexHandler
{
  private static final java.lang.String MULTIPART_PREFIX;
    descriptor: Ljava/lang/String;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: "multipart"

  private boolean persistentConnection;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  private int pendingResponses;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
         0: .line 47
            aload 0 /* this */
            invokespecial io.netty.channel.ChannelDuplexHandler.<init>:()V
         1: .line 50
            aload 0 /* this */
            iconst_1
            putfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.persistentConnection:Z
         2: .line 47
            return
        end local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/netty/handler/codec/http/HttpServerKeepAliveHandler;

  public void channelRead(io.netty.channel.ChannelHandlerContext, java.lang.Object);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
         0: .line 57
            aload 2 /* msg */
            instanceof io.netty.handler.codec.http.HttpRequest
            ifeq 5
         1: .line 58
            aload 2 /* msg */
            checkcast io.netty.handler.codec.http.HttpRequest
            astore 3 /* request */
        start local 3 // io.netty.handler.codec.http.HttpRequest request
         2: .line 59
            aload 0 /* this */
            getfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.persistentConnection:Z
            ifeq 5
         3: .line 60
            aload 0 /* this */
            dup
            getfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.pendingResponses:I
            iconst_1
            iadd
            putfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.pendingResponses:I
         4: .line 61
            aload 0 /* this */
            aload 3 /* request */
            invokestatic io.netty.handler.codec.http.HttpUtil.isKeepAlive:(Lio/netty/handler/codec/http/HttpMessage;)Z
            putfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.persistentConnection:Z
        end local 3 // io.netty.handler.codec.http.HttpRequest request
         5: .line 64
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* ctx */
            aload 2 /* msg */
            invokespecial io.netty.channel.ChannelDuplexHandler.channelRead:(Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;)V
         6: .line 65
            return
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    7     0     this  Lio/netty/handler/codec/http/HttpServerKeepAliveHandler;
            0    7     1      ctx  Lio/netty/channel/ChannelHandlerContext;
            0    7     2      msg  Ljava/lang/Object;
            2    5     3  request  Lio/netty/handler/codec/http/HttpRequest;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
      Name  Flags
      ctx   
      msg   

  public void write(io.netty.channel.ChannelHandlerContext, java.lang.Object, io.netty.channel.ChannelPromise);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=4
        start local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Object msg
        start local 3 // io.netty.channel.ChannelPromise promise
         0: .line 70
            aload 2 /* msg */
            instanceof io.netty.handler.codec.http.HttpResponse
            ifeq 8
         1: .line 71
            aload 2 /* msg */
            checkcast io.netty.handler.codec.http.HttpResponse
            astore 4 /* response */
        start local 4 // io.netty.handler.codec.http.HttpResponse response
         2: .line 72
            aload 0 /* this */
            aload 4 /* response */
            invokevirtual io.netty.handler.codec.http.HttpServerKeepAliveHandler.trackResponse:(Lio/netty/handler/codec/http/HttpResponse;)V
         3: .line 74
            aload 4 /* response */
            invokestatic io.netty.handler.codec.http.HttpUtil.isKeepAlive:(Lio/netty/handler/codec/http/HttpMessage;)Z
            ifeq 4
            aload 4 /* response */
            invokestatic io.netty.handler.codec.http.HttpServerKeepAliveHandler.isSelfDefinedMessageLength:(Lio/netty/handler/codec/http/HttpResponse;)Z
            ifne 6
         4: .line 76
      StackMap locals: io.netty.handler.codec.http.HttpResponse
      StackMap stack:
            aload 0 /* this */
            iconst_0
            putfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.pendingResponses:I
         5: .line 77
            aload 0 /* this */
            iconst_0
            putfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.persistentConnection:Z
         6: .line 80
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.HttpServerKeepAliveHandler.shouldKeepAlive:()Z
            ifne 8
         7: .line 81
            aload 4 /* response */
            iconst_0
            invokestatic io.netty.handler.codec.http.HttpUtil.setKeepAlive:(Lio/netty/handler/codec/http/HttpMessage;Z)V
        end local 4 // io.netty.handler.codec.http.HttpResponse response
         8: .line 84
      StackMap locals:
      StackMap stack:
            aload 2 /* msg */
            instanceof io.netty.handler.codec.http.LastHttpContent
            ifeq 10
            aload 0 /* this */
            invokevirtual io.netty.handler.codec.http.HttpServerKeepAliveHandler.shouldKeepAlive:()Z
            ifne 10
         9: .line 85
            aload 3 /* promise */
            invokeinterface io.netty.channel.ChannelPromise.unvoid:()Lio/netty/channel/ChannelPromise;
            getstatic io.netty.channel.ChannelFutureListener.CLOSE:Lio/netty/channel/ChannelFutureListener;
            invokeinterface io.netty.channel.ChannelPromise.addListener:(Lio/netty/util/concurrent/GenericFutureListener;)Lio/netty/channel/ChannelPromise;
            astore 3 /* promise */
        10: .line 87
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* ctx */
            aload 2 /* msg */
            aload 3 /* promise */
            invokespecial io.netty.channel.ChannelDuplexHandler.write:(Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;Lio/netty/channel/ChannelPromise;)V
        11: .line 88
            return
        end local 3 // io.netty.channel.ChannelPromise promise
        end local 2 // java.lang.Object msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   12     0      this  Lio/netty/handler/codec/http/HttpServerKeepAliveHandler;
            0   12     1       ctx  Lio/netty/channel/ChannelHandlerContext;
            0   12     2       msg  Ljava/lang/Object;
            0   12     3   promise  Lio/netty/channel/ChannelPromise;
            2    8     4  response  Lio/netty/handler/codec/http/HttpResponse;
    Exceptions:
      throws java.lang.Exception
    MethodParameters:
         Name  Flags
      ctx      
      msg      
      promise  

  private void trackResponse(io.netty.handler.codec.http.HttpResponse);
    descriptor: (Lio/netty/handler/codec/http/HttpResponse;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
        start local 1 // io.netty.handler.codec.http.HttpResponse response
         0: .line 91
            aload 1 /* response */
            invokestatic io.netty.handler.codec.http.HttpServerKeepAliveHandler.isInformational:(Lio/netty/handler/codec/http/HttpResponse;)Z
            ifne 2
         1: .line 92
            aload 0 /* this */
            dup
            getfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.pendingResponses:I
            iconst_1
            isub
            putfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.pendingResponses:I
         2: .line 94
      StackMap locals:
      StackMap stack:
            return
        end local 1 // io.netty.handler.codec.http.HttpResponse response
        end local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lio/netty/handler/codec/http/HttpServerKeepAliveHandler;
            0    3     1  response  Lio/netty/handler/codec/http/HttpResponse;
    MethodParameters:
          Name  Flags
      response  

  private boolean shouldKeepAlive();
    descriptor: ()Z
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
         0: .line 97
            aload 0 /* this */
            getfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.pendingResponses:I
            ifne 1
            aload 0 /* this */
            getfield io.netty.handler.codec.http.HttpServerKeepAliveHandler.persistentConnection:Z
            ifne 1
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_1
            ireturn
        end local 0 // io.netty.handler.codec.http.HttpServerKeepAliveHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lio/netty/handler/codec/http/HttpServerKeepAliveHandler;

  private static boolean isSelfDefinedMessageLength(io.netty.handler.codec.http.HttpResponse);
    descriptor: (Lio/netty/handler/codec/http/HttpResponse;)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.HttpResponse response
         0: .line 115
            aload 0 /* response */
            invokestatic io.netty.handler.codec.http.HttpUtil.isContentLengthSet:(Lio/netty/handler/codec/http/HttpMessage;)Z
            ifne 3
            aload 0 /* response */
            invokestatic io.netty.handler.codec.http.HttpUtil.isTransferEncodingChunked:(Lio/netty/handler/codec/http/HttpMessage;)Z
            ifne 3
            aload 0 /* response */
            invokestatic io.netty.handler.codec.http.HttpServerKeepAliveHandler.isMultipart:(Lio/netty/handler/codec/http/HttpResponse;)Z
            ifne 3
         1: .line 116
            aload 0 /* response */
            invokestatic io.netty.handler.codec.http.HttpServerKeepAliveHandler.isInformational:(Lio/netty/handler/codec/http/HttpResponse;)Z
            ifne 3
            aload 0 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.status:()Lio/netty/handler/codec/http/HttpResponseStatus;
            invokevirtual io.netty.handler.codec.http.HttpResponseStatus.code:()I
            getstatic io.netty.handler.codec.http.HttpResponseStatus.NO_CONTENT:Lio/netty/handler/codec/http/HttpResponseStatus;
            invokevirtual io.netty.handler.codec.http.HttpResponseStatus.code:()I
            if_icmpeq 3
         2: .line 115
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         3: iconst_1
            ireturn
        end local 0 // io.netty.handler.codec.http.HttpResponse response
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    4     0  response  Lio/netty/handler/codec/http/HttpResponse;
    MethodParameters:
          Name  Flags
      response  

  private static boolean isInformational(io.netty.handler.codec.http.HttpResponse);
    descriptor: (Lio/netty/handler/codec/http/HttpResponse;)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // io.netty.handler.codec.http.HttpResponse response
         0: .line 120
            aload 0 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.status:()Lio/netty/handler/codec/http/HttpResponseStatus;
            invokevirtual io.netty.handler.codec.http.HttpResponseStatus.codeClass:()Lio/netty/handler/codec/http/HttpStatusClass;
            getstatic io.netty.handler.codec.http.HttpStatusClass.INFORMATIONAL:Lio/netty/handler/codec/http/HttpStatusClass;
            if_acmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // io.netty.handler.codec.http.HttpResponse response
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0  response  Lio/netty/handler/codec/http/HttpResponse;
    MethodParameters:
          Name  Flags
      response  

  private static boolean isMultipart(io.netty.handler.codec.http.HttpResponse);
    descriptor: (Lio/netty/handler/codec/http/HttpResponse;)Z
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=6, locals=2, args_size=1
        start local 0 // io.netty.handler.codec.http.HttpResponse response
         0: .line 124
            aload 0 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.headers:()Lio/netty/handler/codec/http/HttpHeaders;
            getstatic io.netty.handler.codec.http.HttpHeaderNames.CONTENT_TYPE:Lio/netty/util/AsciiString;
            invokevirtual io.netty.handler.codec.http.HttpHeaders.get:(Ljava/lang/CharSequence;)Ljava/lang/String;
            astore 1 /* contentType */
        start local 1 // java.lang.String contentType
         1: .line 125
            aload 1 /* contentType */
            ifnull 4
         2: .line 126
            aload 1 /* contentType */
            iconst_1
            iconst_0
            ldc "multipart"
            iconst_0
            ldc "multipart"
            invokevirtual java.lang.String.length:()I
            invokevirtual java.lang.String.regionMatches:(ZILjava/lang/String;II)Z
            ifeq 4
         3: .line 125
            iconst_1
            ireturn
      StackMap locals: java.lang.String
      StackMap stack:
         4: iconst_0
            ireturn
        end local 1 // java.lang.String contentType
        end local 0 // io.netty.handler.codec.http.HttpResponse response
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    5     0     response  Lio/netty/handler/codec/http/HttpResponse;
            1    5     1  contentType  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      response  
}
SourceFile: "HttpServerKeepAliveHandler.java"