org.glassfish.grizzly.http
Class HttpCodecFilter

java.lang.Object
  org.glassfish.grizzly.filterchain.BaseFilter
      org.glassfish.grizzly.http.HttpCodecFilter

All Implemented Interfaces:

Filter, JmxMonitoringAware<HttpProbe>, MonitoringAware<HttpProbe>

Direct Known Subclasses:

HttpClientFilter, HttpServerFilter

public abstract class HttpCodecFilter
extends BaseFilter
implements JmxMonitoringAware<HttpProbe>

The Filter, responsible for transforming Buffer into HttpPacket and vice versa in asynchronous mode. When the HttpCodecFilter is added to a FilterChain, on read phase it consumes incoming Buffer and provides HttpContent as the result of transformation. On write phase the HttpCodecFilter consumes input HttpPacket and serializes it to a Buffer, which gets passed farther as the result of transformation. So transformations, provided by this filter are following: (read phase): Buffer -> HttpContent (write phase): HttpPacket -> Buffer.

Author:

Alexey Stashok

See Also:

HttpServerFilter, HttpClientFilter

Nested Class Summary

protected static class	HttpCodecFilter.ContentParsingState
protected static class	HttpCodecFilter.HeaderParsingState

Field Summary

protected boolean	chunkingEnabled
protected ArraySet<ContentEncoding>	contentEncodings
static int	DEFAULT_MAX_HTTP_PACKET_HEADER_SIZE
protected int	maxHeadersSize
protected AbstractJmxMonitoringConfig<HttpProbe>	monitoringConfig File cache probes

Constructor Summary

HttpCodecFilter(boolean chunkingEnabled, int maxHeadersSize)
Constructor, which creates HttpCodecFilter instance, with the specific max header size parameter.

Method Summary

void	addContentEncoding(ContentEncoding contentEncoding) Adds the specified ContentEncoding to the HttpCodecFilter.
void	addTransferEncoding(TransferEncoding transferEncoding) Adds the specified TransferEncoding to the HttpCodecFilter.
protected static int	checkEOL(HttpCodecFilter.HeaderParsingState parsingState, Buffer input)
protected JmxObject	createJmxManagementObject()
protected boolean	decodeHttpPacket(FilterChainContext ctx, HttpPacketParsing httpPacket, Buffer input)
protected Buffer	encodeHttpPacket(FilterChainContext ctx, HttpPacket input)
protected static Buffer	encodeKnownHeaders(MemoryManager memoryManager, Buffer buffer, HttpHeader httpHeader)
protected static Buffer	encodeMimeHeader(MemoryManager memoryManager, Buffer buffer, DataChunk name, DataChunk value, boolean encodeLastCRLF)
protected static Buffer	encodeMimeHeaders(MemoryManager memoryManager, Buffer buffer, MimeHeaders mimeHeaders)
protected static boolean	findEOL(HttpCodecFilter.HeaderParsingState state, Buffer input)
protected static int	findSpace(Buffer input, int offset, int packetLimit)
ContentEncoding[]	getContentEncodings() Gets registered ContentEncodings.
JmxMonitoringConfig<HttpProbe>	getMonitoringConfig()
TransferEncoding[]	getTransferEncodings() Gets registered TransferEncodings.
NextAction	handleRead(FilterChainContext ctx, HttpPacketParsing httpPacket) The method is called by the specific HttpCodecFilter implementation, once we have received a Buffer, which has to be transformed into HTTP packet part.
NextAction	handleWrite(FilterChainContext ctx) The method is called, once we need to serialize a HttpPacket, which may represent HTTP packet header, content or content chunk.
protected static int	indexOf(Buffer input, int offset, byte b, int packetLimit)
protected static boolean	isSecure(Connection connection) flag, which indicates whether this HttpCodecFilter is dealing with the secured HTTP packets.
protected abstract void	onHttpContentParsed(HttpContent content, FilterChainContext ctx) Invoked as request/response body content has been processed by this Filter.
protected abstract void	onHttpError(HttpHeader httpHeader, FilterChainContext ctx) Callback which is invoked when parsing an HTTP message fails.
protected abstract boolean	onHttpHeaderParsed(HttpHeader httpHeader, Buffer buffer, FilterChainContext ctx) Callback invoked when the HTTP message header parsing is complete.
protected abstract void	onHttpHeadersParsed(HttpHeader httpHeader, FilterChainContext ctx) Invoked when all headers of the packet have been parsed.
protected abstract boolean	onHttpPacketParsed(HttpHeader httpHeader, FilterChainContext ctx) Callback method, called when HttpPacket parsing has been completed.
protected abstract void	onInitialLineParsed(HttpHeader httpHeader, FilterChainContext ctx) Invoked when either the request line or status line has been parsed.
protected static boolean	parseHeader(HttpHeader httpHeader, MimeHeaders mimeHeaders, HttpCodecFilter.HeaderParsingState parsingState, Buffer input)
protected static boolean	parseHeaderName(HttpHeader httpHeader, MimeHeaders mimeHeaders, HttpCodecFilter.HeaderParsingState parsingState, Buffer input)
protected boolean	parseHeaders(HttpHeader httpHeader, MimeHeaders mimeHeaders, HttpCodecFilter.HeaderParsingState parsingState, Buffer input)
protected static int	parseHeaderValue(HttpHeader httpHeader, HttpCodecFilter.HeaderParsingState parsingState, Buffer input)
boolean	removeContentEncoding(ContentEncoding contentEncoding) Removes the specified ContentEncoding from the HttpCodecFilter.
boolean	removeTransferEncoding(TransferEncoding transferEncoding) Removes the specified TransferEncoding from the HttpCodecFilter.
protected static int	skipSpaces(Buffer input, int offset, int packetLimit)

Methods inherited from class org.glassfish.grizzly.filterchain.BaseFilter

createContext, exceptionOccurred, getFilterChain, getIndex, handleAccept, handleClose, handleConnect, handleEvent, handleRead, onAdded, onFilterChainChanged, onRemoved

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MAX_HTTP_PACKET_HEADER_SIZE

public static final int DEFAULT_MAX_HTTP_PACKET_HEADER_SIZE

See Also:

Constant Field Values

contentEncodings

protected final ArraySet<ContentEncoding> contentEncodings

chunkingEnabled

protected final boolean chunkingEnabled

monitoringConfig

protected final AbstractJmxMonitoringConfig<HttpProbe> monitoringConfig

File cache probes

maxHeadersSize

protected final int maxHeadersSize

Constructor Detail

HttpCodecFilter

public HttpCodecFilter(boolean chunkingEnabled,
                       int maxHeadersSize)

Constructor, which creates HttpCodecFilter instance, with the specific max header size parameter.

Parameters:

chunkingEnabled - true if the chunked transfer encoding should be used when no explicit content length has been set.

maxHeadersSize - the maximum size of the HTTP message header.

Method Detail

onHttpPacketParsed

protected abstract boolean onHttpPacketParsed(HttpHeader httpHeader,
                                              FilterChainContext ctx)

Callback method, called when HttpPacket parsing has been completed.

Parameters:

httpHeader - HttpHeader, which represents parsed HTTP packet header

ctx - processing context.

Returns:

true if an error has occurred while processing the header portion of the HTTP request, otherwise returns false.s

onHttpHeaderParsed

protected abstract boolean onHttpHeaderParsed(HttpHeader httpHeader,
                                              Buffer buffer,
                                              FilterChainContext ctx)

Callback invoked when the HTTP message header parsing is complete.

Parameters:

httpHeader - HttpHeader, which represents parsed HTTP packet header

buffer - Buffer the header was parsed from

ctx - processing context.

Returns:

true if an error has occurred while processing the header portion of the HTTP request, otherwise returns false.

onInitialLineParsed

protected abstract void onInitialLineParsed(HttpHeader httpHeader,
                                            FilterChainContext ctx)

Invoked when either the request line or status line has been parsed.

Parameters:

httpHeader - HttpHeader, which represents HTTP packet header

ctx - processing context.

onHttpHeadersParsed

protected abstract void onHttpHeadersParsed(HttpHeader httpHeader,
                                            FilterChainContext ctx)

Invoked when all headers of the packet have been parsed. Depending on the transfer encoding being used by the current request, this method may be invoked multiple times.

Parameters:

httpHeader - HttpHeader, which represents HTTP packet header

ctx - processing context.

onHttpContentParsed

protected abstract void onHttpContentParsed(HttpContent content,
                                            FilterChainContext ctx)

Invoked as request/response body content has been processed by this Filter.

Parameters:

content - request/response body content

ctx - processing context.

onHttpError

protected abstract void onHttpError(HttpHeader httpHeader,
                                    FilterChainContext ctx)
                             throws IOException

Callback which is invoked when parsing an HTTP message fails. The processing logic has to take care about error handling and following connection closing.

Parameters:

httpHeader - HttpHeader, which represents HTTP packet header

ctx - the FilterChainContext processing this request

Throws:

IOException

getTransferEncodings

public TransferEncoding[] getTransferEncodings()

Gets registered TransferEncodings.

Returns:

registered TransferEncodings.

addTransferEncoding

public void addTransferEncoding(TransferEncoding transferEncoding)

Adds the specified TransferEncoding to the HttpCodecFilter.

Parameters:

transferEncoding - the TransferEncoding to add

removeTransferEncoding

public boolean removeTransferEncoding(TransferEncoding transferEncoding)

Removes the specified TransferEncoding from the HttpCodecFilter.

Parameters:

transferEncoding - the TransferEncoding to remove

Returns:

true if the TransferEncoding was removed, otherwise false indicating the TransferEncoding was not already present

getContentEncodings

public ContentEncoding[] getContentEncodings()

Gets registered ContentEncodings.

Returns:

registered ContentEncodings.

addContentEncoding

public void addContentEncoding(ContentEncoding contentEncoding)

Adds the specified ContentEncoding to the HttpCodecFilter.

Parameters:

contentEncoding - the ContentEncoding to add

removeContentEncoding

public boolean removeContentEncoding(ContentEncoding contentEncoding)

Removes the specified ContentEncoding from the HttpCodecFilter.

Parameters:

contentEncoding - the ContentEncoding to remove

Returns:

true if the ContentEncoding was removed, otherwise false indicating the ContentEncoding was not already present

handleRead

public final NextAction handleRead(FilterChainContext ctx,
                                   HttpPacketParsing httpPacket)
                            throws IOException

The method is called by the specific HttpCodecFilter implementation, once we have received a Buffer, which has to be transformed into HTTP packet part. Filter gets Buffer, which represents a part or complete HTTP message. As the result of "read" transformation - we will get HttpContent message, which will represent HTTP packet content (might be zero length content) and reference to a HttpHeader, which contains HTTP message header.

Parameters:

ctx - Request processing context

httpPacket - the current HttpPacket, which is being processed.

Returns:

NextAction

Throws:

IOException

handleWrite

public NextAction handleWrite(FilterChainContext ctx)
                       throws IOException

The method is called, once we need to serialize a HttpPacket, which may represent HTTP packet header, content or content chunk. Filter gets HttpPacket, which represents a HTTP header, content, or content part. As the result of "write" transformation - we will get Buffer, which will represent serialized HTTP packet.

Specified by:

handleWrite in interface Filter

Overrides:

handleWrite in class BaseFilter

Parameters:

ctx - Request processing context

Returns:

NextAction

Throws:

IOException

decodeHttpPacket

protected boolean decodeHttpPacket(FilterChainContext ctx,
                                   HttpPacketParsing httpPacket,
                                   Buffer input)

encodeHttpPacket

protected Buffer encodeHttpPacket(FilterChainContext ctx,
                                  HttpPacket input)

encodeKnownHeaders

protected static Buffer encodeKnownHeaders(MemoryManager memoryManager,
                                           Buffer buffer,
                                           HttpHeader httpHeader)

encodeMimeHeaders

protected static Buffer encodeMimeHeaders(MemoryManager memoryManager,
                                          Buffer buffer,
                                          MimeHeaders mimeHeaders)

encodeMimeHeader

protected static Buffer encodeMimeHeader(MemoryManager memoryManager,
                                         Buffer buffer,
                                         DataChunk name,
                                         DataChunk value,
                                         boolean encodeLastCRLF)

parseHeaders

protected boolean parseHeaders(HttpHeader httpHeader,
                               MimeHeaders mimeHeaders,
                               HttpCodecFilter.HeaderParsingState parsingState,
                               Buffer input)

parseHeader

protected static boolean parseHeader(HttpHeader httpHeader,
                                     MimeHeaders mimeHeaders,
                                     HttpCodecFilter.HeaderParsingState parsingState,
                                     Buffer input)

parseHeaderName

protected static boolean parseHeaderName(HttpHeader httpHeader,
                                         MimeHeaders mimeHeaders,
                                         HttpCodecFilter.HeaderParsingState parsingState,
                                         Buffer input)

parseHeaderValue

protected static int parseHeaderValue(HttpHeader httpHeader,
                                      HttpCodecFilter.HeaderParsingState parsingState,
                                      Buffer input)

checkEOL

protected static int checkEOL(HttpCodecFilter.HeaderParsingState parsingState,
                              Buffer input)

findEOL

protected static boolean findEOL(HttpCodecFilter.HeaderParsingState state,
                                 Buffer input)

findSpace

protected static int findSpace(Buffer input,
                               int offset,
                               int packetLimit)

skipSpaces

protected static int skipSpaces(Buffer input,
                                int offset,
                                int packetLimit)

indexOf

protected static int indexOf(Buffer input,
                             int offset,
                             byte b,
                             int packetLimit)

isSecure

protected static boolean isSecure(Connection connection)

flag, which indicates whether this HttpCodecFilter is dealing with the secured HTTP packets. For this filter flag means nothing, it's just a value, which is getting set to a HttpRequestPacket or HttpResponsePacket.

getMonitoringConfig

public JmxMonitoringConfig<HttpProbe> getMonitoringConfig()

Specified by:

getMonitoringConfig in interface JmxMonitoringAware<HttpProbe>

Specified by:

getMonitoringConfig in interface MonitoringAware<HttpProbe>

createJmxManagementObject

protected JmxObject createJmxManagementObject()