http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
public class io.undertow.conduits.GzipStreamSourceConduit extends io.undertow.conduits.InflatingStreamSourceConduit
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.undertow.conduits.GzipStreamSourceConduit
  super_class: io.undertow.conduits.InflatingStreamSourceConduit
{
  public static final io.undertow.server.ConduitWrapper<org.xnio.conduits.StreamSourceConduit> WRAPPER;
    descriptor: Lio/undertow/server/ConduitWrapper;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    Signature: Lio/undertow/server/ConduitWrapper<Lorg/xnio/conduits/StreamSourceConduit;>;

  private static final int GZIP_MAGIC;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 35615

  private static final byte[] HEADER;
    descriptor: [B
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private final java.util.zip.CRC32 crc;
    descriptor: Ljava/util/zip/CRC32;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

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

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

  byte[] expectedFooter;
    descriptor: [B
    flags: (0x0000) 

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=0, args_size=0
         0: .line 39
            new io.undertow.conduits.GzipStreamSourceConduit$1
            dup
            invokespecial io.undertow.conduits.GzipStreamSourceConduit$1.<init>:()V
            putstatic io.undertow.conduits.GzipStreamSourceConduit.WRAPPER:Lio/undertow/server/ConduitWrapper;
         1: .line 47
            bipush 10
            newarray 8
            dup
            iconst_0
         2: .line 48
            bipush 31
            bastore
            dup
            iconst_1
         3: .line 49
            bipush -117
            bastore
            dup
            iconst_2
         4: .line 50
            bipush 8
            bastore
         5: .line 47
            putstatic io.undertow.conduits.GzipStreamSourceConduit.HEADER:[B
         6: .line 58
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>(io.undertow.server.HttpServerExchange, org.xnio.conduits.StreamSourceConduit);
    descriptor: (Lio/undertow/server/HttpServerExchange;Lorg/xnio/conduits/StreamSourceConduit;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // io.undertow.conduits.GzipStreamSourceConduit this
        start local 1 // io.undertow.server.HttpServerExchange exchange
        start local 2 // org.xnio.conduits.StreamSourceConduit next
         0: .line 62
            aload 0 /* this */
            aload 1 /* exchange */
            aload 2 /* next */
            invokespecial io.undertow.conduits.InflatingStreamSourceConduit.<init>:(Lio/undertow/server/HttpServerExchange;Lorg/xnio/conduits/StreamSourceConduit;)V
         1: .line 59
            aload 0 /* this */
            new java.util.zip.CRC32
            dup
            invokespecial java.util.zip.CRC32.<init>:()V
            putfield io.undertow.conduits.GzipStreamSourceConduit.crc:Ljava/util/zip/CRC32;
         2: .line 73
            aload 0 /* this */
            iconst_0
            putfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
         3: .line 74
            aload 0 /* this */
            iconst_0
            putfield io.undertow.conduits.GzipStreamSourceConduit.footerRead:I
         4: .line 63
            return
        end local 2 // org.xnio.conduits.StreamSourceConduit next
        end local 1 // io.undertow.server.HttpServerExchange exchange
        end local 0 // io.undertow.conduits.GzipStreamSourceConduit this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Lio/undertow/conduits/GzipStreamSourceConduit;
            0    5     1  exchange  Lio/undertow/server/HttpServerExchange;
            0    5     2      next  Lorg/xnio/conduits/StreamSourceConduit;
    MethodParameters:
          Name  Flags
      exchange  
      next      

  public void <init>(io.undertow.server.HttpServerExchange, org.xnio.conduits.StreamSourceConduit, io.undertow.util.ObjectPool<java.util.zip.Inflater>);
    descriptor: (Lio/undertow/server/HttpServerExchange;Lorg/xnio/conduits/StreamSourceConduit;Lio/undertow/util/ObjectPool;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // io.undertow.conduits.GzipStreamSourceConduit this
        start local 1 // io.undertow.server.HttpServerExchange exchange
        start local 2 // org.xnio.conduits.StreamSourceConduit next
        start local 3 // io.undertow.util.ObjectPool inflaterPool
         0: .line 69
            aload 0 /* this */
            aload 1 /* exchange */
            aload 2 /* next */
            aload 3 /* inflaterPool */
            invokespecial io.undertow.conduits.InflatingStreamSourceConduit.<init>:(Lio/undertow/server/HttpServerExchange;Lorg/xnio/conduits/StreamSourceConduit;Lio/undertow/util/ObjectPool;)V
         1: .line 59
            aload 0 /* this */
            new java.util.zip.CRC32
            dup
            invokespecial java.util.zip.CRC32.<init>:()V
            putfield io.undertow.conduits.GzipStreamSourceConduit.crc:Ljava/util/zip/CRC32;
         2: .line 73
            aload 0 /* this */
            iconst_0
            putfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
         3: .line 74
            aload 0 /* this */
            iconst_0
            putfield io.undertow.conduits.GzipStreamSourceConduit.footerRead:I
         4: .line 70
            return
        end local 3 // io.undertow.util.ObjectPool inflaterPool
        end local 2 // org.xnio.conduits.StreamSourceConduit next
        end local 1 // io.undertow.server.HttpServerExchange exchange
        end local 0 // io.undertow.conduits.GzipStreamSourceConduit this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    5     0          this  Lio/undertow/conduits/GzipStreamSourceConduit;
            0    5     1      exchange  Lio/undertow/server/HttpServerExchange;
            0    5     2          next  Lorg/xnio/conduits/StreamSourceConduit;
            0    5     3  inflaterPool  Lio/undertow/util/ObjectPool<Ljava/util/zip/Inflater;>;
    Signature: (Lio/undertow/server/HttpServerExchange;Lorg/xnio/conduits/StreamSourceConduit;Lio/undertow/util/ObjectPool<Ljava/util/zip/Inflater;>;)V
    MethodParameters:
              Name  Flags
      exchange      
      next          
      inflaterPool  

  protected boolean readHeader(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)Z
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // io.undertow.conduits.GzipStreamSourceConduit this
        start local 1 // java.nio.ByteBuffer headerData
         0: .line 78
            goto 7
         1: .line 79
      StackMap locals:
      StackMap stack:
            aload 1 /* headerData */
            invokevirtual java.nio.ByteBuffer.get:()B
            istore 2 /* data */
        start local 2 // byte data
         2: .line 80
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
            ifne 4
            iload 2 /* data */
            getstatic io.undertow.conduits.GzipStreamSourceConduit.HEADER:[B
            iconst_0
            baload
            if_icmpeq 4
         3: .line 81
            getstatic io.undertow.UndertowMessages.MESSAGES:Lio/undertow/UndertowMessages;
            invokeinterface io.undertow.UndertowMessages.invalidGzipHeader:()Ljava/io/IOException;
            athrow
         4: .line 82
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
            iconst_1
            if_icmpne 6
            iload 2 /* data */
            getstatic io.undertow.conduits.GzipStreamSourceConduit.HEADER:[B
            iconst_1
            baload
            if_icmpeq 6
         5: .line 83
            getstatic io.undertow.UndertowMessages.MESSAGES:Lio/undertow/UndertowMessages;
            invokeinterface io.undertow.UndertowMessages.invalidGzipHeader:()Ljava/io/IOException;
            athrow
         6: .line 85
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            dup
            getfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
            iconst_1
            iadd
            putfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
        end local 2 // byte data
         7: .line 78
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
            getstatic io.undertow.conduits.GzipStreamSourceConduit.HEADER:[B
            arraylength
            if_icmpge 8
            aload 1 /* headerData */
            invokevirtual java.nio.ByteBuffer.hasRemaining:()Z
            ifne 1
         8: .line 87
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.headerRead:I
            getstatic io.undertow.conduits.GzipStreamSourceConduit.HEADER:[B
            arraylength
            if_icmpne 9
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         9: iconst_0
            ireturn
        end local 1 // java.nio.ByteBuffer headerData
        end local 0 // io.undertow.conduits.GzipStreamSourceConduit this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0   10     0        this  Lio/undertow/conduits/GzipStreamSourceConduit;
            0   10     1  headerData  Ljava/nio/ByteBuffer;
            2    7     2        data  B
    Exceptions:
      throws java.io.IOException
    MethodParameters:
            Name  Flags
      headerData  

  protected void readFooter(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=5, args_size=2
        start local 0 // io.undertow.conduits.GzipStreamSourceConduit this
        start local 1 // java.nio.ByteBuffer buf
         0: .line 91
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.expectedFooter:[B
            ifnonnull 17
         1: .line 92
            bipush 8
            newarray 8
            astore 2 /* ret */
        start local 2 // byte[] ret
         2: .line 93
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.crc:Ljava/util/zip/CRC32;
            invokevirtual java.util.zip.CRC32.getValue:()J
            l2i
            istore 3 /* checksum */
        start local 3 // int checksum
         3: .line 94
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.totalOut:I
            istore 4 /* total */
        start local 4 // int total
         4: .line 95
            aload 2 /* ret */
            iconst_0
            iload 3 /* checksum */
            sipush 255
            iand
            i2b
            bastore
         5: .line 96
            aload 2 /* ret */
            iconst_1
            iload 3 /* checksum */
            bipush 8
            ishr
            sipush 255
            iand
            i2b
            bastore
         6: .line 97
            aload 2 /* ret */
            iconst_2
            iload 3 /* checksum */
            bipush 16
            ishr
            sipush 255
            iand
            i2b
            bastore
         7: .line 98
            aload 2 /* ret */
            iconst_3
            iload 3 /* checksum */
            bipush 24
            ishr
            sipush 255
            iand
            i2b
            bastore
         8: .line 99
            aload 2 /* ret */
            iconst_4
            iload 4 /* total */
            sipush 255
            iand
            i2b
            bastore
         9: .line 100
            aload 2 /* ret */
            iconst_5
            iload 4 /* total */
            bipush 8
            ishr
            sipush 255
            iand
            i2b
            bastore
        10: .line 101
            aload 2 /* ret */
            bipush 6
            iload 4 /* total */
            bipush 16
            ishr
            sipush 255
            iand
            i2b
            bastore
        11: .line 102
            aload 2 /* ret */
            bipush 7
            iload 4 /* total */
            bipush 24
            ishr
            sipush 255
            iand
            i2b
            bastore
        12: .line 103
            aload 0 /* this */
            aload 2 /* ret */
            putfield io.undertow.conduits.GzipStreamSourceConduit.expectedFooter:[B
        end local 4 // int total
        end local 3 // int checksum
        end local 2 // byte[] ret
        13: .line 105
            goto 17
        14: .line 106
      StackMap locals:
      StackMap stack:
            aload 1 /* buf */
            invokevirtual java.nio.ByteBuffer.get:()B
            istore 2 /* data */
        start local 2 // byte data
        15: .line 107
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.expectedFooter:[B
            aload 0 /* this */
            dup
            getfield io.undertow.conduits.GzipStreamSourceConduit.footerRead:I
            dup_x1
            iconst_1
            iadd
            putfield io.undertow.conduits.GzipStreamSourceConduit.footerRead:I
            baload
            iload 2 /* data */
            if_icmpeq 17
        16: .line 108
            getstatic io.undertow.UndertowMessages.MESSAGES:Lio/undertow/UndertowMessages;
            invokeinterface io.undertow.UndertowMessages.invalidGZIPFooter:()Ljava/io/IOException;
            athrow
        end local 2 // byte data
        17: .line 105
      StackMap locals:
      StackMap stack:
            aload 1 /* buf */
            invokevirtual java.nio.ByteBuffer.hasRemaining:()Z
            ifeq 18
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.footerRead:I
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.expectedFooter:[B
            arraylength
            if_icmplt 14
        18: .line 112
      StackMap locals:
      StackMap stack:
            aload 1 /* buf */
            invokevirtual java.nio.ByteBuffer.hasRemaining:()Z
            ifeq 20
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.footerRead:I
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.expectedFooter:[B
            arraylength
            if_icmpne 20
        19: .line 113
            getstatic io.undertow.UndertowMessages.MESSAGES:Lio/undertow/UndertowMessages;
            invokeinterface io.undertow.UndertowMessages.invalidGZIPFooter:()Ljava/io/IOException;
            athrow
        20: .line 115
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.nio.ByteBuffer buf
        end local 0 // io.undertow.conduits.GzipStreamSourceConduit this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   21     0      this  Lio/undertow/conduits/GzipStreamSourceConduit;
            0   21     1       buf  Ljava/nio/ByteBuffer;
            2   13     2       ret  [B
            3   13     3  checksum  I
            4   13     4     total  I
           15   17     2      data  B
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      buf   

  protected void dataDeflated(byte[], int, int);
    descriptor: ([BII)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // io.undertow.conduits.GzipStreamSourceConduit this
        start local 1 // byte[] data
        start local 2 // int off
        start local 3 // int len
         0: .line 118
            aload 0 /* this */
            getfield io.undertow.conduits.GzipStreamSourceConduit.crc:Ljava/util/zip/CRC32;
            aload 1 /* data */
            iload 2 /* off */
            iload 3 /* len */
            invokevirtual java.util.zip.CRC32.update:([BII)V
         1: .line 119
            aload 0 /* this */
            dup
            getfield io.undertow.conduits.GzipStreamSourceConduit.totalOut:I
            iload 3 /* len */
            iadd
            putfield io.undertow.conduits.GzipStreamSourceConduit.totalOut:I
         2: .line 120
            return
        end local 3 // int len
        end local 2 // int off
        end local 1 // byte[] data
        end local 0 // io.undertow.conduits.GzipStreamSourceConduit this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/undertow/conduits/GzipStreamSourceConduit;
            0    3     1  data  [B
            0    3     2   off  I
            0    3     3   len  I
    MethodParameters:
      Name  Flags
      data  
      off   
      len   
}
SourceFile: "GzipStreamSourceConduit.java"
NestMembers:
  io.undertow.conduits.GzipStreamSourceConduit$1
InnerClasses:
  io.undertow.conduits.GzipStreamSourceConduit$1