* src/Request.h: Use AuthResolver to get authentication
information.
* src/main.cc: Made RequestFactory a singleton object. Netrc is
now
set to RequestFactory object.
* src/AuthConfigItem.h, src/AuthConfigItem.cc: Removed.
* src/AuthConfig.h, src/AuthConfig.cc: Rewritten.
* src/TrackerWatcherComand.cc: Use RequestFactorySingletonHolder
to
create Request object.
To integrate Netrc into exsiting classes:
* src/Request.h
(_userDefinedAuthConfig): New variable.
(findNetrcAuthenticator): New function.
(segment): Removed.
(setUserDefinedAuthConfig): New function.
(resolveHttpAuthConfigItem): New function.
(resolveFtpAuthConfigItem): New function.
(resolveHttpProxyAuthConfigItem): New function.
* src/HttpRequest.h
(authConfig): Removed.
(proxyAuthConfig): Removed.
(setAuthConfig): Removed.
(setProxyAuthConfig): Removed.
* src/UrlRequest.h
(getHeadResult): Added a parameter: authConfigHandle
* src/common.h
(SingletonHolder.h): New include.
* src/main.cc
(Netrc.h): New include.
(main): Removed initial values of PREF_FTP_USER,
PREF_FTP_PASSWD.
Added initial value of PREF_NETRC_PATH.
Added the initialization of netrc.
* src/AuthConfig.h: New class.
* src/prefs.h
(PREF_NETRC_PATH): New definition.
* src/HttpAuthConfig.h: Removed.
* src/Netrc.cc
(getRequiredNextToken): New function.
(skipMacdef): New function.
(parse): Rewritten.
* src/Netrc.h
(getRequiredNextToken): New function.
(skipMacdef): New function.
* src/Util.h, src/Util.cc
(getHomeDir): New function.
* src/TrackerWatcherComand.cc
(createRequestCommand): Use AuthConfig.
* src/FtpConnection.cc
(sendUser): Use Request::resolveFtpAuthConfigItem().
(sendPass): Use Request::resolveFtpAuthConfigItem().
* src/Request.cc
(findNetrcAuthenticator): New function.
(resolveHttpAuthConfigItem): New function.
(resolveFtpAuthConfigItem): New function.
(resolveHttpProxyAuthConfigItem): New function.
* src/UrlRequestInfo.cc: Use AuthConfig.
* src/HttpRequest.cc
(createRequest): Use authConfig.
(getProxyAuthString): Use authConfig.
(configure): Removed PREF_HTTP_USER, PREF_HTTP_PASSWD,
PREF_HTTP_PROXY_USER, PREF_HTTP_PROXY_PASSWD.
* src/HttpHeader.h
(Range.h): New include.
(status): New variable.
(HttpHeader): Initialized status with 0.
(getStatus): New function.
(setStatus): New function.
(getRange): New function.
(HttpHeaderHandle): New function.
* src/HttpHeader.cc
(getRange): New function.
* src/Request.h
(RequestWeakHandle): New definition.
* src/HttpConnection.h
(HttpConnectionHandle): New type definition.
* src/HttpConnection.cc
(receiveResponse): Set HTTP status to headers.
* src/main.cc
(showUsage): Fixed typo.
* src/Segment.h
(SegmentHandle): New type definition.
* src/BitfieldMan.h
(getMissingUnusedLength): New function.
* src/BitfieldMan.cc
(getMissingUnusedLength): New function.
To add chunk checksum validation:
* src/MetalinkEntry.h
(MetalinkChunkChecksum.h): New include.
(chunkChecksum): New variable.
* src/Request.h
(method): New variable.
(setMethod): New function.
(getMethod): New function.
(METHOD_GET): New static constant.
(METHOD_HEAD): New static constant.
* src/Xml2MetalinkProcessor.h
(getPieceHash): New function.
* src/PieceStorage.h
(markAllPiecesDone): New function.
(checkIntegrity): New function.
* src/FileAllocator.h
(NullFileAllocationMonitor.h): New include.
(FileAllocator): Initialize fileAllocationMonitor with new
NullFileAllocationMonitor().
* src/MultiDiskAdaptor.h
(messageDigest.h): Remove include.
(ctx): Removed.
(hashUpdate): Added ctx.
(MultiDiskAdaptor): Removed ctx.
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/UrlRequestInfo.h
(HeadResult): New class.
(digestAlgo): New variable.
(chunkChecksumLength): New variable.
(chunkChecksums): New variable.
(getHeadResult): New function.
(UrlRequestInfo): Added digestAlgo, chunkChecksumLength.
(setDigestAlgo): New function.
(setChunkChecksumLength): New function.
(setChunkChecksums): New function.
* src/DefaultPieceStorage.cc
(DiskAdaptorWriter.h): New include.
(ChunkChecksumValidator.h): New include.
(markAllPiecesDone): New function.
(checkIntegrity): New function.
* src/DefaultBtContext.h
(getPieceHashes): New function.
* src/TorrentRequestInfo.cc
(execute): Try to validate chunk checksum if file already exists
and
.aria2 file doesn't there and user allows aria2 to overwrite it.
* src/messageDigest.h
(~MessageDigestContext): Added digestFree().
* src/MetalinkRequestInfo.cc
(execute): Set digestAlgo, chunkChecksum, chunkChecksums to
reqInfo.
* src/DiskAdaptor.h
(messageDigest.h): New include.
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/DownloadCommand.h
(PeerStat.h): New include.
(maxDownloadSpeedLimit): New variable.
(startupIdleTime): New variable.
(lowestDownloadSpeedLimit): New variable.
(peerStat): New variable.
(setMaxDownloadSpeedLimit): New function.
(setStartupIdleTime): New function.
(setLowestDownloadSPeedLimit): New function.
* src/BtContext.h
(getPieceHashes): New function.
* src/main.cc
(main): Set PREF_REALTIME_CHUNK_CHECKSUM and
PREF_CHECK_INTEGRITY
option to true for testing purpose.
* src/BtPieceMessage.cc
(checkPieceHash): Use messageDigest
* src/DownloadEngine.cc
(SetDescriptor): Removed.
(AccumulateActiveCommand): Removed.
(waitData): Rewritten.
(updateFdSet): Rewritten.
* src/MultiDiskAdaptor.cc
(hashUpdate): Added ctx.
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/BitfieldMan.h
(isBitRangeSet): New function.
(unsetBitRange): New function.
* src/ByteArrayDiskWriter.h
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/ConsoleDownloadEngine.cc
(calculateStatistics): If nspeed < 0 then set nspeed to 0.
* src/DiskWriter.h
(messageDigest.h): New include.
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/ChunkChecksumValidator.h: New class.
* src/DiskAdaptorWriter.h: New class.
* src/prefs.h
(PREF_REALTIME_CHUNK_CHECKSUM): New definition.
(PREF_CHECK_INTEGRITY): New definition.
* src/HttpResponseCommand.cc
(handleDefaultEncoding): Added method "HEAD" handling.
Removed the call to
e->segmentMan->shouldCancelDownloadForSafety().
(handleOtherEncoding):
Added the call to
e->segmentMan->shouldCancelDownloadForSafety().
(createHttpDownloadCommand): Set maxDownloadSpeedLimit,
startupIdleTime, lowestDownloadSpeedLimit to command.
* src/SegmentMan.h
(getSegmentEntryByIndex): New function.
(getSegmentEntryByCuid): New function.
(getSegmentEntryIteratorByCuid): New function.
(diskWriter): DiskWriter -> DiskWriterHandle
(pieceHashes): New variable.
(chunkHashLength): New variable.
(digestAlgo): New variable.
(FindPeerStat): Removed.
(getPeerStat): Rewritten.
(markAllPiecesDone): New function.
(checkIntegrity): New function.
(tryChunkChecksumValidation): New function.
(isChunkChecksumValidationReady): New function.
* src/BitfieldMan.cc
(BitfieldMan): Initialized bitfieldLength, blocks to 0.
(BitfieldMan): Initialized blockLength, totalLength,
bitfieldLength,
blocks to 0.
(isBitRangeSet): New function.
(unsetBitRange): New function.
* src/FtpNegotiateCommand.cc
(executeInternal): Set maxDownloadSpeedLimit,
startupIdleTime, lowestDownloadSpeedLimit to command.
(recvSize): Added method "HEAD" handling.
Removed the call to
e->segmentMan->shouldCancelDownloadForSafety().
* src/AbstractSingleDiskAdaptor.cc
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/AbstractSingleDiskAdaptor.h
(sha1Sum): Renamed as messageDigest.
(messageDigest): New function.
* src/Util.h
(indexRange): New function.
* src/MetalinkEntry.cc
(MetalinkEntry): Initialized chunkChecksum to 0.
* src/ShaVisitor.cc
(~ShaVisitor): Removed the call to ctx.digestFree().
* src/SegmentMan.cc
(ChunkChecksumValidator.h): New include.
(SegmentMan): Initialized chunkHashLength to 0. Initialized
digestAlgo
to DIGEST_ALGO_SHA1.
(~SegmentMan): Removed diskWriter.
(FindSegmentEntryByIndex): Removed.
(FindSegmentEntryByCuid): Removed.
(checkoutSegment): Rewritten.
(findSlowerSegmentEntry): Rewritten.
(getSegment): Rewritten.
(updateSegment): Rewritten.
(completeSegment): Rewritten.
(markAllPiecesDone): New function.
(checkIntegrity): New function.
(isChunkChecksumValidationReady): New function.
(tryChunkChecksumValidation): New function.
* src/Xml2MetalinkProcessor.cc
(getEntry): Get size and set it to entry.
Get chunk checksum and set it to entry.
(getPieceHash): New function.
* src/Util.cc
(sha1Sum): Removed ctx.digestFree()
(fileChecksum): Removed ctx.digestFree()
(indexRange): New function.
* src/Request.cc
(METHOD_GET): New variable.
(METHOD_HEAD): New variable.
(Request): Added method.
* src/UrlRequestInfo.cc
(FatalException.h): New include.
(message.h): New include.
(operator<<): Added operator<< for class HeadResult.
(getHeadResult): New function.
(execute): Get filename and size in separate download engine.
* src/ChunkChecksumValidator.cc: New class.
* src/DownloadCommand.cc:
(DownloadCommand): Added peerStat.
(executeInternal): Use maxDownloadSpeedLimit member instead of
getting
the value from Option.
The buffer size is now 16KB.
Use peerStat member instead of getting it from SegmentMan.
Use startupIdleTime member instead of gettingit from Option.
Added chunk checksum validation.
* src/AbstractDiskWriter.cc
(AbstractDiskWriter): Removed ctx.
(~AbstractDiskWriter): Removed ctx.digestFree()
(writeDataInternal): Returns the return value of write.
(readDataInternal): Returns the return value of read.
(sha1Sum): Renamed as messageDigest
(messageDigest): New function.
* src/AbstractDiwkWriter.h
(messageDigest.h): Removed include.
(ctx): Removed.
(sha1Sum): Renamed as messageDigest
(messageDigest): New function.
* src/DefaultPieceStorage.h
(markAllPiecesDone): New function.
(checkIntegrity): New function.
* src/NullFileAllocationMonitor.h: New class.
To rewrite segment download mechanism for HTTP/FTP download.
Use BitfieldMan to manage segment download.
* src/HttpResponseCommand.h
(executeInternal): Pass the reference of segment.
* src/AbstractCommand.cc
(prepareForRetry): Call segmentMan->cancelSegment here.
(onAbort): Call segmentMan->cancelSegment here.
* src/HttpDownloadCommand.cc
(prepareForNextSegment): New function.
* src/DownloadEngineFactory.cc
(newConsoleEngine): Removed splitter.
(newTorrentConsoleEngine): Removed splitter.
* src/Request.h
(segment): Renamed from seg.
* src/FtpInitiateConnectionCommand.h
(executeInternal): Pass the reference of segment.
* src/AbstractCommand.h
(executeInternal): Pass the reference of segment.
* src/pref.h
(PREF_SEGMENT_SIZE): New definition.
* src/HttpProxyRequestCommand.h
(executeInternal): Pass the reference of segment.
* src/HttpResponseCommand.cc
(checkResponse): Allowed status 206 when a request range starts
0.
(handleDefaultEncoding): Rewritten the code related to Segment.
(handleOtherEncoding): Rewritten the code related to Segment.
* src/SegmentMan.h
(SegmentEntry): New class.
(SegmentEntries): New type definition.
(bitfield): New variable.
(usedSegmentEntries): New variable.
(onNullBitfield): New function.
(checkoutSegment): New function.
(segments): Removed.
(splitter): Removed.
(unregisterId): Removed.
(getSegment): New function(overload)
(getDownloadedSize): Removed.
(cancelSegment): New function.
(completeSegment): New function.
(initBitfield): New function.
(hasSegment): New function.
(getDownloadLength): New function.
* src/BitfieldMan.h
(getStartIndex): New function.
(getEndIndex): New function.
(getMissingUnusedIndex): New function(overload).
(getSparseMissingUnusedIndex): New function.
* src/BitfieldMan.cc
(getMissingIndexRandomly): Handle the last byte of bitfield
properly.
(getMissingUnusedIndex): New function(overload).
(Range): New class.
(getStartIndex): New function.
(getEndIndex): New function.
(getSparseMissingUnusedIndex): New function.
(isBitSetInternal): Return false if the given index is less than
0.
* src/HttpInitiateConnectionCommand.h
(executeInternal): Pass the reference of segment.
* src/FtpNegotiateCommand.h
(executeInternal): Pass the reference of segment.
* src/FtpNegotiateCommand.cc
(recvSize): Initialize bitfield here.
* src/FtpTunnelResponseCommand.h
(executeInternal): Pass the reference of segment.
* src/HttpConnection.cc
(createRequest): Rewritten range header processing.
* src/DownloadCommand.h
(executeInternal): Pass the reference of segment.
(prepareForRetry): Removed.
(prepareForNextSegment): Added an argument segment. Made it a
virtual
function.
* src/main.cc
(main): Set the initial value of PREF_SEGMENT_SIZE to 1MB.
* src/SegmentMan.cc
(SegmentMan): Added bitfield. Removed splitter.
(~SegmentMan): Added bitfield. Removed splitter.
(unregisterId): Removed.
(getSegment): Rewritten.
(updateSegment): Rewritten.
(save): Rewritten.
(read): Rewritten.
(finished): Rewritten.
(getDownloadedSize): Removed.
(initBitfield): New function.
(FindSegmentEntryByIndex): New function object.
(FindSegmentEntryByCuid): New function object.
(checkoutSegment): New function.
(onNullBitfield): New function.
(getSegment): New function(overload).
(CancelSegment): New function object.
(cancelSegment): New function.
(completeSegment): New function.
(hasSegment): New function.
(getDownloadLength): New function.
* src/FtpInitiateConnectionCommand.cc
(executeInternal): Load .aria2 file after hostname resolution
finishes.
* src/Segment.h: Rewritten.
* src/Segment.cc (operator<<): New function.
* src/HttpDownloadCommand.h
(prepareForNextSegment): New function.
* src/Request.cc
(resetUrl): Made segment null.
* src/DownloadEngine.cc
(~DownloadEngine): Call cleanQueue before deleting segmentMan.
* src/HttpProxyRequestCommand.h
(executeInternal): Pass the reference of segment.
* src/DownloadCommand.cc
(executeInternal): Rewritten the code related to Segment.
(prepareForRetry): Removed.
(prepareForNextSegment): Rewritten.
* src/FtpTunnelResponseCommand.h
(executeInternal): Pass the reference of segment.
To add HTTP 1.1 persistent connection support(experimental)
* src/HttpRequestCommand.cc
(executeInternal): Disable keep alive if it is disabled by
configuration.
* src/Request.h
(keepAlive): New variable.
(isKeepAlive): New function.
(setKeepAlive): New function.
* src/pref.h
(PREF_HTTP_KEEP_ALIVE): New definition.
* src/HttpResponseCommand.cc
(executeInternal): Check the remote server supports keep alive.
* src/HttpConnection.cc
(createRequest): Send "Connection: close" only if keep alive is
disabled.
* src/main.cc
(main):
Set the initial value(false) of PREF_KEEP_ALIVE to false.
To add max download speed limit:
* src/pref.h
(PREF_MAX_SPEED_LIMIT): New definition.
* src/PeerInteractionCommand.cc
(executeInternal): Added max download speed limit. Not tested
yet.
* src/SegmentMan.h
(PeerStats): New type definition.
(peerStats): New variable.
(registerPeerStat): New function.
(FindPeerStat): New function object.
(getPeerStat): New function.
(calculateDownloadSpeed): New function.
* src/SpeedCalc.h: New class.
* src/SpeedCalc.cc: New class.
* src/main.cc
(main):
Set the initial value of PREF_MAX_SPEED_LIMIT to 0(which means
the
download speed is not restricted).
* src/PeerStat.h: New class.
* src/SegmentMan.cc
(registerPeerStat): New function.
(calculateDownloadSpeed): New function.
* src/DownloadCommand.cc
(STARTUP_IDLE_TIME): New definition.
(DownloadCommand): Register peerStat to segmentMan. Call
peerStat->
downloadStart.
(~DownloadCommand): Call peerStat->downloadStop.
(executeInternal): Added download speed limitter. Rewritten
lowest
speed limitter.
* src/HttpConnection.cc
(receiveResponse): Fixed: eohIndex[headerBuf] ->
headerBuf[eohIndex].
* src/AbstractCommand.cc
(resolveHostname): Throw DlAbortEx if a name resolution failes.
Added hostname to the error message.
* src/ConsoleDownloadEngine.cc
(calculateStatistics): Initialize psize with dlSize.
* src/PieceMessage.cc
(receivedAction): Do not call peerInteraction->abortPiece here.
(onGotWrongPiece): Call peerInteraction->abortPiece here.
* src/BitfieldMan.h
(clearAllUseBit): New function.
(setAllUseBit): New function.
* src/BitfieldMan.cc
(clearAllBit): Do not clear useBitfield here.
(clearAllUseBit): New function.
(setAllUseBit): New function.
* src/Piece.cc
(clearAllBlock): Call bitfield->clearAllUseBit().
* src/TorrentMan.h:
(advertisePiece): Updated doc.
(getAdvertisedPieceIndexes): Updated doc.
(removeAdvertisedPiece); New function.
* src/TorrentMan.cc
(FindElapsedHave): New function object.
(removeAdvertisedPiece): New function.
* src/HaveEraseCommand.h: New class.
* src/HaveEraseCommand.cc: New class.
* src/FeatureConfig.h: New class.
* src/FeatureConfig.cc: New class.
* src/Request.h
(defaultPorts): Removed.
* src/Request.cc
(FeatureConfig.h): Included.
(Request): Removed the statements related to defaultPorts.
(parseUrl): Removed metalinkEnabled. Use FeatureConfig instead.
A default port number is now retrieved from FeatureConfig.
* src/main.cc
(HaveEraseCommand.h): Included.
(showVersion): Added the output of feature list.
(main): Added HaveEraseCommand to command queue in BitTorrent
downloading.
* src/PeerInteractionCommand.h
(chokeCheckPoint): Commented out.
(periodicExecPoint): New variable.
* src/PeerInteractionCommand.cc
(executeInternal): Following methods are now called in at least
every
0.5 seconds to reduce CPU usage:
detectMessageFlooding(), peerInteraction->checkRequestSlot(),
checkHave(), sendKeepAlive().
(checkLongTimePeerChoking): Commented out.
* src/BitfieldMan.h
(getNthBitIndex): Changed the method signature.
(getMissingIndexRandomly): Changed the method signature.
* src/BitfieldMan.cc
(getNthBitIndex): Rewritten
(getMissingIndexRandomly): Rewritten.
(hasMissingPiece): Rewritten.
(getMissingIndex): Refactored.
(getMissingUnusedIndex); Refactored.
(getMissingIndex): Refactored.
To add the support for Metalink3.0 backward compatible links:
* src/Request.h
(SAFE_CHARS): Added '#'.
(METALINK_MARK): New definition.
* src/Request.cc
(parseUrl): Added the support for Metalink3.0 backward
compatible
links.
etc
* src/PeerInteraction.cc
(MsgPushBack): Removed.
(sendMessages): Use STL copy and back_inserter.
(rejectAllPieceMessageInQueue): Use STL copy and back_inserter.
(rejectPieceMessageInQueue): Use STL copy and back_inserter.
* src/TorrentMan.h
(MAX_PEER_LIST_SIZE): Changed to 100 from 250.
To add Metalink support(http/ftp only):
* src/AbstractCommand.h
(tryReserved): New function.
* src/AbstractCommand.cc
(execute): Call tryReserved().
(tryReserved): New function.
* src/Request.h
(Requests): New type definition.
* src/SegmentMan.h
(reserved): New variable.
* src/Util.h
(fileChecksum): New function.
(toUpper): New function.
(toLower): New function.
* src/Util.cc
(messageDigest.h): Included.
(trim): Trim \r\n\t.
(fileChecksum): New function.
(toUpper): New function.
(toLower): New function.
* src/main.cc
(normalDownload): New function.
(main): Added 2 command-line options: metalink-file,
metalink-connection. Their usage has not been written yet.
* src/MetalinkProcessor.h: New class.
* src/Xml2MetalinkProcessor.h: New class.
* src/Xml2MetalinkProcessor.cc: New class.
* src/MetalinkEntry.h: New class.
* src/MetalinkEntry.cc: New class.
* src/MetalinkResource.h: New class.
* src/MetalinkResource.cc: New class.
To add md5 message digest checking:
* src/messageDigest.h: Rewritten.
* src/MultiDiskWriter.cc: Updated according to the changes in
messageDigest.h.
* src/ShaVisitor.cc: Updated according to the changes in
messageDigest.h.
* src/Util.cc: Updated according to the changes in
messageDigest.h.
* src/AbstractDiskWriter.cc: Updated according to the changes in
messageDigest.h.
To fix a bug that causes segfault when the payload length in
peer
message is less than 0:
* src/PeerConnection.cc:
(receiveMessage): Fixed the bug.
* src/PeerMessageUtil.cc
(checkLength): Throw an exception if length is less than or
equals to
0.
To add new interfaces to Base64 encoding/decoding:
* src/Base64.h
(part_encode): Changed the method signature.
(encode): New function(overload).
(decode): New function(overload).
* src/Base64.cc
(part_encode): Rewritten.
(encode): Rewritten.
(encode): New function(overload).
To prevent a peer to download same piece if there is an error in
checksum:
* src/PieceMessage.cc
(receivedAction): Call peerInteraction->abortPiece().
* TorrentDownloadEngine.cc: Prints "Download complete" message
instead of downloaded size and progress(%) after download
completes.
* PeerInteractionCommand.cc: After download completes, sends
unchoke
message to the peer if it is interested in what localhost has
downloaded.
* TorrentMan.cc: In single-file mode, copy temporary file to the
final
destination instead of just renaming it.
* TorrentMan.cc: Added deleteTempFile().
* PeerAbstractCommand.cc: do not stop execution after download
completes. This makes localhost a seeder.
* Util.{h,cc}: Added fileCopy().
* PeerListenCommand.cc: do not stop execution after download
completes.
This makes localhost a seeder.
* main.cc: Do not call TorrentMan::fixFilename() in
torrentHandler.
Added TorrentMan::deleteTempFile() to torrentHandler.
Initialized the variable dir as ".".
* TorrentMan.h: Changed DEFAULT_ANNOUNCE_INTERVAL to 120
seconds.
Deleted renameSingleFile().
Added copySingleFile(), deleteTempFile().
* DownloadEngine.h: Added virtual function afterEachIteration().
* TorrentDownloadEngine.cc: Move a call to
TorrentMan::fixFilename()
in onEndOfRun() to afterEachIteration().
In onEndOfRun(), changed if condition to check whether
filenameFixed is
true.
* Util.cc: Implemented fileCopy() using rangedFileCopy().
In rangedFileCopy(), added try-catch block to properly close
file
descriptors.
* TorrentDownloadEngine.cc: Added a member variable
filenameFixed.
Added afterEachIteration(), isFilenameFixed().
* Peer.cc: Changed choking strategy.
* PreAllocationDiskWriter.cc: Drop O_DIRECT flag.
* TrackerInitCommand.cc: Send completed event only once.
* DownloadEngine.cc: Added a call to afterEachIteration().
* TrackerUpdateCommand.cc: Do not stop execution after download
completes.
* TorrentMan.h: Defined MAX_PEER_UPDATE as 15. aria2 attempts to
connect the peers at most MAX_PEER_UPDATE when a peer list is
received from a tracker.
* TrackerUpdateCommand.cc: Implemented above mentioned behavior.
Decreased the number of failure peers to delete to 0(just
comment out
the line).
* Release 0.3.1
* Added SocketCore. Socket is now handle class for SocketCore.
* Fixed bug in ChunkedEncoding: expanding buffer size is wrong
* Fixed bug in DownloadCommand: In Chunked Encoding, it wrongly
adds to Segment.ds buff length from the socket.