Undertow 2.3.12.Final · io.undertow.protocols.http2.HpackDecoder

Modifier and Type	Class and Description
public static interface	HpackDecoder.HeaderEmitter

Field Summary

Modifier and Type	Field and Description
private int	currentMemorySize the current calculates memory size, as per the HPACK algorithm
private static final int	DEFAULT_RING_BUFFER_SIZE
private int	filledTableSlots The current table size by index (aka the number of index positions that are filled up)
private boolean	first
private int	firstSlotPosition The current HEAD position of the header table.
private HpackDecoder.HeaderEmitter	headerEmitter The object that receives the headers that are emitted from this decoder
private Hpack.HeaderField[]	headerTable The header table
private final int	maxAllowedMemorySize The maximum allowed memory size, as specified by us.
private int	specifiedMemorySize The current memory size, as specified by the client
private final StringBuilder	stringBuilder

Constructor Summary

Access	Constructor and Description
public	HpackDecoder(int maxAllowedMemorySize)
public	HpackDecoder()

Method Summary

Modifier and Type	Method and Description
private void	addEntryToHeaderTable(Hpack.HeaderField entry)
private void	addStaticTableEntry(int index)
public void	decode(ByteBuffer The buffer buffer, boolean moreData) Decodes the provided frame data.
pack-priv int	getCurrentMemorySize()
pack-priv int	getFilledTableSlots()
pack-priv int	getFirstSlotPosition()
public HpackDecoder.HeaderEmitter	getHeaderEmitter()
pack-priv Hpack.HeaderField[]	getHeaderTable()
pack-priv int	Returns: the real index into the array getRealIndex(int The index from the hpack index) because we use a ring buffer type construct, and don't actually shuffle items in the array, we need to figure out he real index to use.
pack-priv int	getSpecifiedMemorySize()
private void	handleIndex(int The index index) Handle an indexed header representation
private HttpString	handleIndexedHeaderName(int index)
private boolean	handleMaxMemorySizeChange(ByteBuffer buffer, int originalPos)
private HttpString	readHeaderName(ByteBuffer buffer, int prefixLength)
private String	readHpackString(ByteBuffer buffer)
private String	readHuffmanString(int length, ByteBuffer buffer)
private void	resizeIfRequired()
public void	setHeaderEmitter(HpackDecoder.HeaderEmitter headerEmitter)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

currentMemorySize	back to summary
private int currentMemorySize the current calculates memory size, as per the HPACK algorithm

DEFAULT_RING_BUFFER_SIZE	back to summary
private static final int DEFAULT_RING_BUFFER_SIZE

filledTableSlots	back to summary
private int filledTableSlots The current table size by index (aka the number of index positions that are filled up)

first	back to summary
private boolean first

firstSlotPosition	back to summary
private int firstSlotPosition The current HEAD position of the header table. We use a ring buffer type construct as it would be silly to actually shuffle the items around in the array.

headerEmitter	back to summary
private HpackDecoder.HeaderEmitter headerEmitter The object that receives the headers that are emitted from this decoder

headerTable	back to summary
private Hpack.HeaderField[] headerTable The header table

maxAllowedMemorySize	back to summary
private final int maxAllowedMemorySize The maximum allowed memory size, as specified by us. If the client tries to increase beyond this amount it is an error

specifiedMemorySize	back to summary
private int specifiedMemorySize The current memory size, as specified by the client

stringBuilder	back to summary
private final StringBuilder stringBuilder

Constructor Detail

HpackDecoder	back to summary
public HpackDecoder(int maxAllowedMemorySize)

HpackDecoder	back to summary
public HpackDecoder()

Method Detail

addEntryToHeaderTable	back to summary
private void addEntryToHeaderTable(Hpack.HeaderField entry)

addStaticTableEntry	back to summary
private void addStaticTableEntry(int index) throws HpackException

decode	back to summary
public void decode(ByteBuffer buffer, boolean moreData) throws HpackException Decodes the provided frame data. If this method leaves data in the buffer then this buffer should be compacted so this data is preserved, unless there is no more data in which case this should be considered a protocol error. Parameters buffer:ByteBuffer The buffer

decode

back to summary

public void decode(ByteBuffer buffer, boolean moreData) throws HpackException

Decodes the provided frame data. If this method leaves data in the buffer then this buffer should be compacted so this data is preserved, unless there is no more data in which case this should be considered a protocol error.

Parameters

buffer:ByteBuffer: The buffer

getCurrentMemorySize	back to summary
pack-priv int getCurrentMemorySize()

getFilledTableSlots	back to summary
pack-priv int getFilledTableSlots()

getFirstSlotPosition	back to summary
pack-priv int getFirstSlotPosition()

getHeaderEmitter	back to summary
public HpackDecoder.HeaderEmitter getHeaderEmitter()

getHeaderTable	back to summary
pack-priv Hpack.HeaderField[] getHeaderTable()

getRealIndex	back to summary
pack-priv int getRealIndex(int index) throws HpackException because we use a ring buffer type construct, and don't actually shuffle items in the array, we need to figure out he real index to use. package private for unit tests Parameters index:int The index from the hpack Returns:int the real index into the array

getRealIndex

back to summary

pack-priv int getRealIndex(int index) throws HpackException

because we use a ring buffer type construct, and don't actually shuffle items in the array, we need to figure out he real index to use.

package private for unit tests

Parameters

index:int: The index from the hpack

Returns:int

the real index into the array

getSpecifiedMemorySize	back to summary
pack-priv int getSpecifiedMemorySize()

handleIndex	back to summary
private void handleIndex(int index) throws HpackException Handle an indexed header representation Parameters index:int The index

handleIndex

back to summary

private void handleIndex(int index) throws HpackException

Handle an indexed header representation

Parameters

index:int: The index

handleIndexedHeaderName	back to summary
private HttpString handleIndexedHeaderName(int index) throws HpackException

handleMaxMemorySizeChange	back to summary
private boolean handleMaxMemorySizeChange(ByteBuffer buffer, int originalPos) throws HpackException

readHeaderName	back to summary
private HttpString readHeaderName(ByteBuffer buffer, int prefixLength) throws HpackException

readHpackString	back to summary
private String readHpackString(ByteBuffer buffer) throws HpackException

readHuffmanString	back to summary
private String readHuffmanString(int length, ByteBuffer buffer) throws HpackException

resizeIfRequired	back to summary
private void resizeIfRequired()

setHeaderEmitter	back to summary
public void setHeaderEmitter(HpackDecoder.HeaderEmitter headerEmitter)

public Class HpackDecoder

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public Interface HpackDecoder.HeaderEmitter

Method Summary

Method Detail