Package org.apache.coyote.http11.filters
Class ChunkedInputFilter
java.lang.Object
org.apache.coyote.http11.filters.ChunkedInputFilter
- All Implemented Interfaces:
InputFilter
,InputBuffer
,ApplicationBufferHandler
Chunked input filter. Parses chunked data according to
http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6.1
- Author:
- Remy Maucherat
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected InputBuffer
Next buffer in the pipeline.protected static final ByteChunk
protected static final String
protected boolean
Flag set to true when the end chunk has been read.protected boolean
Flag set to true if the next call to doRead() must parse a CRLF pair before doing anything else.protected ByteBuffer
Byte chunk used to read bytes.protected int
Number of bytes remaining in the current chunk.protected final ByteChunk
Byte chunk used to store trailing headers.Fields inherited from interface org.apache.tomcat.util.net.ApplicationBufferHandler
EMPTY, EMPTY_BUFFER
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Constructor Summary
ConstructorsConstructorDescriptionChunkedInputFilter
(int maxTrailerSize, Set<String> allowedTrailerHeaders, int maxExtensionSize, int maxSwallowSize) -
Method Summary
Modifier and TypeMethodDescriptionint
Amount of bytes still available in a buffer.int
doRead
(ApplicationBufferHandler handler) Read from the input stream into the ByteBuffer provided by the ApplicationBufferHandler.long
end()
End the current request.void
expand
(int size) Return the name of the associated encoding; Here, the value is "identity".boolean
Has the request body been read fully?protected boolean
Parse the header of a chunk.protected void
parseCRLF
(boolean tolerant) Parse CRLF at end of chunk.protected void
Parse end chunk data.protected int
Read bytes from the previous buffer.void
recycle()
Make the filter ready to process the next request.void
setBuffer
(InputBuffer buffer) Set the next buffer in the filter pipeline.void
setByteBuffer
(ByteBuffer buffer) void
setRequest
(Request request) Read the content length from the request.
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Field Details
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ENCODING_NAME
- See Also:
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ENCODING
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buffer
Next buffer in the pipeline. -
remaining
protected int remainingNumber of bytes remaining in the current chunk. -
readChunk
Byte chunk used to read bytes. -
endChunk
protected boolean endChunkFlag set to true when the end chunk has been read. -
trailingHeaders
Byte chunk used to store trailing headers. -
needCRLFParse
protected boolean needCRLFParseFlag set to true if the next call to doRead() must parse a CRLF pair before doing anything else.
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Constructor Details
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ChunkedInputFilter
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Method Details
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doRead
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 interfaceInputBuffer
- 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
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setRequest
Read the content length from the request.- Specified by:
setRequest
in interfaceInputFilter
- Parameters:
request
- The request to be associated with this filter
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end
End the current request.- Specified by:
end
in interfaceInputFilter
- 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
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available
public int available()Amount of bytes still available in a buffer.- Specified by:
available
in interfaceInputBuffer
- Returns:
- The number of bytes that can be read without blocking
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setBuffer
Set the next buffer in the filter pipeline.- Specified by:
setBuffer
in interfaceInputFilter
- Parameters:
buffer
- The next buffer
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recycle
public void recycle()Make the filter ready to process the next request.- Specified by:
recycle
in interfaceInputFilter
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getEncodingName
Return the name of the associated encoding; Here, the value is "identity".- Specified by:
getEncodingName
in interfaceInputFilter
- 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
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isFinished
public boolean isFinished()Description copied from interface:InputFilter
Has the request body been read fully?- Specified by:
isFinished
in interfaceInputFilter
- Returns:
true
if the request body has been fully read, otherwisefalse
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readBytes
Read bytes from the previous buffer.- Returns:
- The byte count which has been read
- Throws:
IOException
- Read error
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parseChunkHeader
Parse the header of a chunk. A chunk header can look like one of the following:
A10CRLF
F23;chunk-extension to be ignoredCRLFThe 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
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parseCRLF
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
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parseEndChunk
Parse end chunk data.- Throws:
IOException
- Error propagation
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setByteBuffer
- Specified by:
setByteBuffer
in interfaceApplicationBufferHandler
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getByteBuffer
- Specified by:
getByteBuffer
in interfaceApplicationBufferHandler
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expand
public void expand(int size) - Specified by:
expand
in interfaceApplicationBufferHandler
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