Package org.apache.coyote.http11.filters

Class ChunkedInputFilter

java.lang.Object
org.apache.coyote.http11.filters.ChunkedInputFilter
All Implemented Interfaces:
InputFilter, InputBuffer, ApplicationBufferHandler
public class ChunkedInputFilter extends Object implements InputFilter, ApplicationBufferHandler
Chunked input filter. Parses chunked data according to http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6.1
Author:
Remy Maucherat

  • Field Details

    • ENCODING_NAME

      protected static final String ENCODING_NAME
      See Also:

    • ENCODING

      protected static final ByteChunk ENCODING

    • buffer

      protected InputBuffer buffer
      Next buffer in the pipeline.

    • remaining

      protected int remaining
      Number of bytes remaining in the current chunk.

    • readChunk

      protected ByteBuffer readChunk
      Byte chunk used to read bytes.

    • endChunk

      protected boolean endChunk
      Flag set to true when the end chunk has been read.

    • trailingHeaders

      protected final ByteChunk trailingHeaders
      Byte chunk used to store trailing headers.

    • needCRLFParse

      protected boolean needCRLFParse
      Flag set to true if the next call to doRead() must parse a CRLF pair before doing anything else.

  • Constructor Details

    • ChunkedInputFilter

      public ChunkedInputFilter(int maxTrailerSize, Set<String> allowedTrailerHeaders, int maxExtensionSize, int maxSwallowSize)

  • Method Details

    • doRead

      public int doRead(ApplicationBufferHandler handler) throws IOException
      Description copied from interface: InputBuffer
      Read from the input stream into the ByteBuffer provided by the ApplicationBufferHandler. IMPORTANT: the current model assumes that the protocol will 'own' the ByteBuffer and return a pointer to it.
      Specified by:
      doRead in interface InputBuffer
      Parameters:
      handler - ApplicationBufferHandler that provides the buffer to read data into.
      Returns:
      The number of bytes that have been added to the buffer or -1 for end of stream
      Throws:
      IOException - If an I/O error occurs reading from the input stream

    • setRequest

      public void setRequest(Request request)
      Read the content length from the request.
      Specified by:
      setRequest in interface InputFilter
      Parameters:
      request - The request to be associated with this filter

    • end

      public long end() throws IOException
      End the current request.
      Specified by:
      end in interface InputFilter
      Returns:
      0 is the expected return value. A positive value indicates that too many bytes were read. This method is allowed to use buffer.doRead to consume extra bytes. The result of this method can't be negative (if an error happens, an IOException should be thrown instead).
      Throws:
      IOException - If an error happens

    • available

      public int available()
      Amount of bytes still available in a buffer.
      Specified by:
      available in interface InputBuffer
      Returns:
      The number of bytes that can be read without blocking

    • setBuffer

      public void setBuffer(InputBuffer buffer)
      Set the next buffer in the filter pipeline.
      Specified by:
      setBuffer in interface InputFilter
      Parameters:
      buffer - The next buffer

    • recycle

      public void recycle()
      Make the filter ready to process the next request.
      Specified by:
      recycle in interface InputFilter

    • getEncodingName

      public ByteChunk getEncodingName()
      Return the name of the associated encoding; Here, the value is "identity".
      Specified by:
      getEncodingName in interface InputFilter
      Returns:
      The encoding name as a byte chunk to facilitate comparison with the value read from the HTTP headers which will also be a ByteChunk

    • isFinished

      public boolean isFinished()
      Description copied from interface: InputFilter
      Has the request body been read fully?
      Specified by:
      isFinished in interface InputFilter
      Returns:
      true if the request body has been fully read, otherwise false

    • readBytes

      protected int readBytes() throws IOException
      Read bytes from the previous buffer.
      Returns:
      The byte count which has been read
      Throws:
      IOException - Read error

    • parseChunkHeader

      protected boolean parseChunkHeader() throws IOException
      Parse the header of a chunk. A chunk header can look like one of the following:
      A10CRLF
      F23;chunk-extension to be ignoredCRLF

      The letters before CRLF or ';' (whatever comes first) must be valid hex digits. We should not parse F23IAMGONNAMESSTHISUP34CRLF as a valid header according to the spec.

      Returns:
      true if the chunk header has been successfully parsed
      Throws:
      IOException - Read error

    • parseCRLF

      protected void parseCRLF(boolean tolerant) throws IOException
      Parse CRLF at end of chunk.
      Parameters:
      tolerant - Should tolerant parsing (LF and CRLF) be used? This is recommended (RFC2616, section 19.3) for message headers.
      Throws:
      IOException - An error occurred parsing CRLF

    • parseEndChunk

      protected void parseEndChunk() throws IOException
      Parse end chunk data.
      Throws:
      IOException - Error propagation

    • setByteBuffer

      public void setByteBuffer(ByteBuffer buffer)
      Specified by:
      setByteBuffer in interface ApplicationBufferHandler

    • getByteBuffer

      public ByteBuffer getByteBuffer()
      Specified by:
      getByteBuffer in interface ApplicationBufferHandler

    • expand

      public void expand(int size)
      Specified by:
      expand in interface ApplicationBufferHandler