Class HAProxyMessageDecoder.HeaderExtractor

java.lang.Object
io.netty.handler.codec.haproxy.HAProxyMessageDecoder.HeaderExtractor
Direct Known Subclasses:
HAProxyMessageDecoder.LineHeaderExtractor, HAProxyMessageDecoder.StructHeaderExtractor
Enclosing class:
HAProxyMessageDecoder
private abstract class HAProxyMessageDecoder.HeaderExtractor extends java.lang.Object
HeaderExtractor create a header frame out of the ByteBuf.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private final int
    maxHeaderSize
    Header max size

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    protected
    HeaderExtractor(int maxHeaderSize)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected abstract int
    delimiterLength(ByteBuf buffer, int eoh)
    Get the length of the header delimiter.
    ByteBuf
    extract(ChannelHandlerContext ctx, ByteBuf buffer)
    Create a frame out of the ByteBuf and return it.
    protected abstract int
    findEndOfHeader(ByteBuf buffer)
    Find the end of the header from the given ByteBuf，the end may be a CRLF, or the length given by the header.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • maxHeaderSize

      private final int maxHeaderSize
      Header max size

  • Constructor Details

    • HeaderExtractor

      protected HeaderExtractor(int maxHeaderSize)

  • Method Details

    • extract

      public ByteBuf extract(ChannelHandlerContext ctx, ByteBuf buffer) throws java.lang.Exception
      Create a frame out of the ByteBuf and return it.
      Parameters:
      ctx - the ChannelHandlerContext which this HAProxyMessageDecoder belongs to
      buffer - the ByteBuf from which to read data
      Returns:
      frame the ByteBuf which represent the frame or null if no frame could be created
      Throws:
      java.lang.Exception - if exceed maxLength

    • findEndOfHeader

      protected abstract int findEndOfHeader(ByteBuf buffer)
      Find the end of the header from the given ByteBuf，the end may be a CRLF, or the length given by the header.
      Parameters:
      buffer - the buffer to be searched
      Returns:
      -1 if can not find the end, otherwise return the buffer index of end

    • delimiterLength

      protected abstract int delimiterLength(ByteBuf buffer, int eoh)
      Get the length of the header delimiter.
      Parameters:
      buffer - the buffer where delimiter is located
      eoh - index of delimiter
      Returns:
      length of the delimiter