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.example.http.upload.HttpUploadClientHandler extends io.netty.channel.SimpleChannelInboundHandler<io.netty.handler.codec.http.HttpObject>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.netty.example.http.upload.HttpUploadClientHandler
  super_class: io.netty.channel.SimpleChannelInboundHandler
{
  private boolean readingChunks;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.example.http.upload.HttpUploadClientHandler this
         0: .line 30
            aload 0 /* this */
            invokespecial io.netty.channel.SimpleChannelInboundHandler.<init>:()V
            return
        end local 0 // io.netty.example.http.upload.HttpUploadClientHandler this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/example/http/upload/HttpUploadClientHandler;

  public void channelRead0(io.netty.channel.ChannelHandlerContext, io.netty.handler.codec.http.HttpObject);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/http/HttpObject;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=8, args_size=3
        start local 0 // io.netty.example.http.upload.HttpUploadClientHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // io.netty.handler.codec.http.HttpObject msg
         0: .line 36
            aload 2 /* msg */
            instanceof io.netty.handler.codec.http.HttpResponse
            ifeq 17
         1: .line 37
            aload 2 /* msg */
            checkcast io.netty.handler.codec.http.HttpResponse
            astore 3 /* response */
        start local 3 // io.netty.handler.codec.http.HttpResponse response
         2: .line 39
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            new java.lang.StringBuilder
            dup
            ldc "STATUS: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.status:()Lio/netty/handler/codec/http/HttpResponseStatus;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
         3: .line 40
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            new java.lang.StringBuilder
            dup
            ldc "VERSION: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.protocolVersion:()Lio/netty/handler/codec/http/HttpVersion;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
         4: .line 42
            aload 3 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.headers:()Lio/netty/handler/codec/http/HttpHeaders;
            invokevirtual io.netty.handler.codec.http.HttpHeaders.isEmpty:()Z
            ifne 12
         5: .line 43
            aload 3 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.headers:()Lio/netty/handler/codec/http/HttpHeaders;
            invokevirtual io.netty.handler.codec.http.HttpHeaders.names:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 5
            goto 11
      StackMap locals: io.netty.example.http.upload.HttpUploadClientHandler io.netty.channel.ChannelHandlerContext io.netty.handler.codec.http.HttpObject io.netty.handler.codec.http.HttpResponse top java.util.Iterator
      StackMap stack:
         6: aload 5
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.lang.CharSequence
            astore 4 /* name */
        start local 4 // java.lang.CharSequence name
         7: .line 44
            aload 3 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.headers:()Lio/netty/handler/codec/http/HttpHeaders;
            aload 4 /* name */
            invokevirtual io.netty.handler.codec.http.HttpHeaders.getAll:(Ljava/lang/CharSequence;)Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 7
            goto 10
      StackMap locals: io.netty.example.http.upload.HttpUploadClientHandler io.netty.channel.ChannelHandlerContext io.netty.handler.codec.http.HttpObject io.netty.handler.codec.http.HttpResponse java.lang.CharSequence java.util.Iterator top java.util.Iterator
      StackMap stack:
         8: aload 7
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.lang.CharSequence
            astore 6 /* value */
        start local 6 // java.lang.CharSequence value
         9: .line 45
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            new java.lang.StringBuilder
            dup
            ldc "HEADER: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 4 /* name */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            ldc " = "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 6 /* value */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        end local 6 // java.lang.CharSequence value
        10: .line 44
      StackMap locals:
      StackMap stack:
            aload 7
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 8
        end local 4 // java.lang.CharSequence name
        11: .line 43
      StackMap locals: io.netty.example.http.upload.HttpUploadClientHandler io.netty.channel.ChannelHandlerContext io.netty.handler.codec.http.HttpObject io.netty.handler.codec.http.HttpResponse top java.util.Iterator
      StackMap stack:
            aload 5
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 6
        12: .line 50
      StackMap locals: io.netty.example.http.upload.HttpUploadClientHandler io.netty.channel.ChannelHandlerContext io.netty.handler.codec.http.HttpObject io.netty.handler.codec.http.HttpResponse
      StackMap stack:
            aload 3 /* response */
            invokeinterface io.netty.handler.codec.http.HttpResponse.status:()Lio/netty/handler/codec/http/HttpResponseStatus;
            invokevirtual io.netty.handler.codec.http.HttpResponseStatus.code:()I
            sipush 200
            if_icmpne 16
            aload 3 /* response */
            invokestatic io.netty.handler.codec.http.HttpUtil.isTransferEncodingChunked:(Lio/netty/handler/codec/http/HttpMessage;)Z
            ifeq 16
        13: .line 51
            aload 0 /* this */
            iconst_1
            putfield io.netty.example.http.upload.HttpUploadClientHandler.readingChunks:Z
        14: .line 52
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            ldc "CHUNKED CONTENT {"
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        15: .line 53
            goto 17
        16: .line 54
      StackMap locals:
      StackMap stack:
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            ldc "CONTENT {"
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        end local 3 // io.netty.handler.codec.http.HttpResponse response
        17: .line 57
      StackMap locals:
      StackMap stack:
            aload 2 /* msg */
            instanceof io.netty.handler.codec.http.HttpContent
            ifeq 28
        18: .line 58
            aload 2 /* msg */
            checkcast io.netty.handler.codec.http.HttpContent
            astore 3 /* chunk */
        start local 3 // io.netty.handler.codec.http.HttpContent chunk
        19: .line 59
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            aload 3 /* chunk */
            invokeinterface io.netty.handler.codec.http.HttpContent.content:()Lio/netty/buffer/ByteBuf;
            getstatic io.netty.util.CharsetUtil.UTF_8:Ljava/nio/charset/Charset;
            invokevirtual io.netty.buffer.ByteBuf.toString:(Ljava/nio/charset/Charset;)Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        20: .line 61
            aload 3 /* chunk */
            instanceof io.netty.handler.codec.http.LastHttpContent
            ifeq 27
        21: .line 62
            aload 0 /* this */
            getfield io.netty.example.http.upload.HttpUploadClientHandler.readingChunks:Z
            ifeq 24
        22: .line 63
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            ldc "} END OF CHUNKED CONTENT"
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        23: .line 64
            goto 25
        24: .line 65
      StackMap locals: io.netty.handler.codec.http.HttpContent
      StackMap stack:
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            ldc "} END OF CONTENT"
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        25: .line 67
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iconst_0
            putfield io.netty.example.http.upload.HttpUploadClientHandler.readingChunks:Z
        26: .line 68
            goto 28
        27: .line 69
      StackMap locals:
      StackMap stack:
            getstatic java.lang.System.err:Ljava/io/PrintStream;
            aload 3 /* chunk */
            invokeinterface io.netty.handler.codec.http.HttpContent.content:()Lio/netty/buffer/ByteBuf;
            getstatic io.netty.util.CharsetUtil.UTF_8:Ljava/nio/charset/Charset;
            invokevirtual io.netty.buffer.ByteBuf.toString:(Ljava/nio/charset/Charset;)Ljava/lang/String;
            invokevirtual java.io.PrintStream.println:(Ljava/lang/String;)V
        end local 3 // io.netty.handler.codec.http.HttpContent chunk
        28: .line 72
      StackMap locals:
      StackMap stack:
            return
        end local 2 // io.netty.handler.codec.http.HttpObject msg
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.example.http.upload.HttpUploadClientHandler this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   29     0      this  Lio/netty/example/http/upload/HttpUploadClientHandler;
            0   29     1       ctx  Lio/netty/channel/ChannelHandlerContext;
            0   29     2       msg  Lio/netty/handler/codec/http/HttpObject;
            2   17     3  response  Lio/netty/handler/codec/http/HttpResponse;
            7   11     4      name  Ljava/lang/CharSequence;
            9   10     6     value  Ljava/lang/CharSequence;
           19   28     3     chunk  Lio/netty/handler/codec/http/HttpContent;
    MethodParameters:
      Name  Flags
      ctx   
      msg   

  public void exceptionCaught(io.netty.channel.ChannelHandlerContext, java.lang.Throwable);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Throwable;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // io.netty.example.http.upload.HttpUploadClientHandler this
        start local 1 // io.netty.channel.ChannelHandlerContext ctx
        start local 2 // java.lang.Throwable cause
         0: .line 76
            aload 2 /* cause */
            invokevirtual java.lang.Throwable.printStackTrace:()V
         1: .line 77
            aload 1 /* ctx */
            invokeinterface io.netty.channel.ChannelHandlerContext.channel:()Lio/netty/channel/Channel;
            invokeinterface io.netty.channel.Channel.close:()Lio/netty/channel/ChannelFuture;
            pop
         2: .line 78
            return
        end local 2 // java.lang.Throwable cause
        end local 1 // io.netty.channel.ChannelHandlerContext ctx
        end local 0 // io.netty.example.http.upload.HttpUploadClientHandler this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    3     0   this  Lio/netty/example/http/upload/HttpUploadClientHandler;
            0    3     1    ctx  Lio/netty/channel/ChannelHandlerContext;
            0    3     2  cause  Ljava/lang/Throwable;
    MethodParameters:
       Name  Flags
      ctx    
      cause  

  public void channelRead0(io.netty.channel.ChannelHandlerContext, java.lang.Object);
    descriptor: (Lio/netty/channel/ChannelHandlerContext;Ljava/lang/Object;)V
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            aload 2
            checkcast io.netty.handler.codec.http.HttpObject
            invokevirtual io.netty.example.http.upload.HttpUploadClientHandler.channelRead0:(Lio/netty/channel/ChannelHandlerContext;Lio/netty/handler/codec/http/HttpObject;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    Exceptions:
      throws java.lang.Exception
}
Signature: Lio/netty/channel/SimpleChannelInboundHandler<Lio/netty/handler/codec/http/HttpObject;>;
SourceFile: "HttpUploadClientHandler.java"