https://tomcat.apache.org/: Tomcat Connectors and HTTP parser 
public class org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer implements org.apache.coyote.InputBuffer
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer
  super_class: java.lang.Object
{
  final org.apache.coyote.ajp.AjpProcessor this$0;
    descriptor: Lorg/apache/coyote/ajp/AjpProcessor;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  protected void <init>(org.apache.coyote.ajp.AjpProcessor);
    descriptor: (Lorg/apache/coyote/ajp/AjpProcessor;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer this
         0: .line 1295
            aload 0 /* this */
            aload 1
            putfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/coyote/ajp/AjpProcessor$SocketInputBuffer;
    MethodParameters:
        Name  Flags
      this$0  final

  public int doRead(org.apache.tomcat.util.net.ApplicationBufferHandler);
    descriptor: (Lorg/apache/tomcat/util/net/ApplicationBufferHandler;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer this
        start local 1 // org.apache.tomcat.util.net.ApplicationBufferHandler handler
         0: .line 1300
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            getfield org.apache.coyote.ajp.AjpProcessor.endOfStream:Z
            ifeq 2
         1: .line 1301
            iconst_m1
            ireturn
         2: .line 1303
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            getfield org.apache.coyote.ajp.AjpProcessor.empty:Z
            ifeq 5
         3: .line 1304
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            iconst_1
            invokevirtual org.apache.coyote.ajp.AjpProcessor.refillReadBuffer:(Z)Z
            ifne 5
         4: .line 1305
            iconst_m1
            ireturn
         5: .line 1308
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            getfield org.apache.coyote.ajp.AjpProcessor.bodyBytes:Lorg/apache/tomcat/util/buf/MessageBytes;
            invokevirtual org.apache.tomcat.util.buf.MessageBytes.getByteChunk:()Lorg/apache/tomcat/util/buf/ByteChunk;
            astore 2 /* bc */
        start local 2 // org.apache.tomcat.util.buf.ByteChunk bc
         6: .line 1309
            aload 1 /* handler */
            aload 2 /* bc */
            invokevirtual org.apache.tomcat.util.buf.ByteChunk.getBuffer:()[B
            aload 2 /* bc */
            invokevirtual org.apache.tomcat.util.buf.ByteChunk.getStart:()I
            aload 2 /* bc */
            invokevirtual org.apache.tomcat.util.buf.ByteChunk.getLength:()I
            invokestatic java.nio.ByteBuffer.wrap:([BII)Ljava/nio/ByteBuffer;
            invokeinterface org.apache.tomcat.util.net.ApplicationBufferHandler.setByteBuffer:(Ljava/nio/ByteBuffer;)V
         7: .line 1310
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            iconst_1
            putfield org.apache.coyote.ajp.AjpProcessor.empty:Z
         8: .line 1311
            aload 1 /* handler */
            invokeinterface org.apache.tomcat.util.net.ApplicationBufferHandler.getByteBuffer:()Ljava/nio/ByteBuffer;
            invokevirtual java.nio.ByteBuffer.remaining:()I
            ireturn
        end local 2 // org.apache.tomcat.util.buf.ByteChunk bc
        end local 1 // org.apache.tomcat.util.net.ApplicationBufferHandler handler
        end local 0 // org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    9     0     this  Lorg/apache/coyote/ajp/AjpProcessor$SocketInputBuffer;
            0    9     1  handler  Lorg/apache/tomcat/util/net/ApplicationBufferHandler;
            6    9     2       bc  Lorg/apache/tomcat/util/buf/ByteChunk;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
         Name  Flags
      handler  

  public int available();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer this
         0: .line 1316
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            getfield org.apache.coyote.ajp.AjpProcessor.empty:Z
            ifeq 2
         1: .line 1317
            iconst_0
            ireturn
         2: .line 1319
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer.this$0:Lorg/apache/coyote/ajp/AjpProcessor;
            getfield org.apache.coyote.ajp.AjpProcessor.bodyBytes:Lorg/apache/tomcat/util/buf/MessageBytes;
            invokevirtual org.apache.tomcat.util.buf.MessageBytes.getByteChunk:()Lorg/apache/tomcat/util/buf/ByteChunk;
            invokevirtual org.apache.tomcat.util.buf.ByteChunk.getLength:()I
            ireturn
        end local 0 // org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/apache/coyote/ajp/AjpProcessor$SocketInputBuffer;
}
SourceFile: "AjpProcessor.java"
NestHost: org.apache.coyote.ajp.AjpProcessor
InnerClasses:
  protected SocketInputBuffer = org.apache.coyote.ajp.AjpProcessor$SocketInputBuffer of org.apache.coyote.ajp.AjpProcessor