This commits implements basic downloading feature for sftp URI. This
includes segmented downloads, and connection (sftp session) pooling.
Download via HTTP proxy has not been implemented yet.
This option enables disk cache. If SIZE is 0, the disk cache is
disabled. This feature caches the downloaded data in memory, which
grows to at most SIZE bytes. The cache storage is created for aria2
instance and shared by all downloads. The one advantage of the disk
cache is reduce the disk seek time because the data is written in
larger unit and it is reordered by the offset of the file. If the
underlying file is heavily fragmented it is not the case.
We introduced SocketRecvBuffer which buffers received bytes. Since
HTTP response header and response body are divided with \r\n, we have
to buffer up several bytes to find this delimiter. We use
SocketRecvBuffer to hold these bytes and only consumes header and
passes SocketRecvBuffer, which may contain head of response body, to
next Command. Since FTPConnection doesn't use SocketCore::peekData(),
we left it as is.
Added .cc file for classes/structs that only provided by header
file. Defined non-POD classes' ctor, dtor in .cc file. Moved
implementation code in header file to .cc file for major
classes/strucsts.
Fixed the bug that segments are not filled to
Request::getMaxPipelinedRequest().
Make sure that trailing data of transfer encoding is read propery,
after file data is received.
* src/AbstractCommand.cc
* src/DownloadCommand.cc
* src/DownloadCommand.h
* src/FtpDownloadCommand.cc
* src/FtpDownloadCommand.h
* src/HttpDownloadCommand.cc
* src/HttpDownloadCommand.h
Added --max-overall-download-limit option. Now
--max-upload-limit option is not ignored when
--max-overall-upload-limit option has non-zero value. aria2
checks download(upload) speed in the order:
first checks overall speed limit and if it is not exceeded, then
checks speed limit per download. Thus you can specify both
value. For example, set --max-overall-download-limit=1M and
--max-download-limit=500K to prevent from one download from
eating all overall speed limit.
* src/DefaultBtInteractive.cc
* src/DefaultBtInteractive.h
* src/DefaultBtMessageDispatcher.cc
* src/DefaultBtMessageDispatcher.h
* src/DownloadCommand.cc
* src/DownloadCommand.h
* src/FtpNegotiationCommand.cc
* src/HttpResponseCommand.cc
* src/OptionHandlerFactory.cc
* src/PeerInteractionCommand.cc
* src/RequestGroup.cc
* src/RequestGroup.h
* src/RequestGroupMan.cc
* src/RequestGroupMan.h
* src/prefs.cc
* src/prefs.h
* src/usage_text.h
* test/DefaultBtMessageDispatcherTest.cc
Added gzip, deflate decoding support in HTTP using libz. If
compiled
with this feature, aria2 sends "Accept-Encoding: deflate, gzip"
header
to a HTTP server. If a server returns "Content-Encoding: gzip"
or
"Content-Encoding: deflate" then, aria2 decodes the response
body on the
fly and writes decoded data to a local disk.
* README
* README.html
* configure.ac
* m4/aria2_arg.m4: Added ARIA2_ARG_WITH and ARIA2_ARG_ENABLE,
they are
wrapper function for AC_ARG_WITH and AC_ARG_ENABLE respectively.
* m4/libz.m4
* src/Decoder.h
* src/DownloadCommand.cc
* src/DownloadCommand.h
* src/Exception.h
* src/GZipDecoder.cc
* src/GZipDecoder.h
* src/HttpHeader.cc
* src/HttpHeader.h
* src/HttpRequest.cc
* src/HttpRequest.h
* src/HttpResponse.cc
* src/HttpResponse.h
* src/HttpResponseCommand.cc
* src/Makefile.am
* test/GZipDecoderTest.cc
* test/HttpRequestTest.cc
* test/HttpResponseTest.cc
* test/Makefile.am
* test/Makefile.in
* test/gzip_decode_test.gz
Calculate piece hash when data is arrived if the data is arrived
in
order. This removes additional read operation for hash
calculation.
If the data is arrived in out of order, the hash is calucated
when the
piece is completed. This is the same behavior as the old
implementation.
* src/BtPieceMessage.cc
* src/DefaultBtProgressInfoFile.cc
* src/DefaultPieceStorage.cc
* src/DownloadCommand.cc
* src/DownloadCommand.h
* src/DownloadEngine.cc
* src/GrowSegment.cc
* src/GrowSegment.h
* src/Piece.cc
* src/Piece.h
* src/PiecedSegment.cc
* src/PiecedSegment.h
* src/Segment.h
* test/PieceTest.cc
Create MessageDigestHelper::staticSHA1DigestInit() which uses
statically declared sha1 MessageDigestContext.
* src/BtPieceMessage.cc: Use staticSHA1DigestInit() to avoid
initialization of short-lived MessageDigestContext.
* src/MessageDigestHelper.{h, cc}
* src/main.cc
Now DownloadCommand has a reference to MessageDigestContext to avoid
the initialization of MessageDigestContext every time in validating
chunk checksum.
* src/DownloadCommand.{h, cc}
Fixed the bug that SegmentMan::completeSegment() is not called
even if Segment is complete when --lowest-speed-limit is
enabled.
BUG#1864525
* src/DownloadCommand.{h, cc}
Implemented BitTorrent/http/ftp integrated download.
I've rewritten lots of files and now some headers have forward
class declarations to reduce compile time.
The implementation is extremely alpha stage, I recommend to use this
for testing purpose only.
To handle Segment as SegmentHandle:
* src/AbstractCommand.cc (execute): Rewritten.
* src/SegmentMan.h: Segment -> SegmentHandle
Introducded HttpResponse class, HttpRequest class to improve
code
extensiveness and make it clear:
* src/HttpDownloadCommand.cc: transfer encoders are now managed
by
HttpResponse class.
* src/HttpRequest.h, src/HttpRequest.cc: New class.
* src/HttpResponse.h, src/HttpResponse.cc: New class.
* src/HttpConnection.cc: Contruction of http request were moved
to
HttpRequest class.
* src/HttpResponseCommand.h, src/HttpResponseCommand.cc:
Refactored.
* src/HttpRequestCommand.cc (executeInternal): Rewritten.
* src/HttpAuthConfig.h: New class.
* src/Range.h: New class.
To make FtpTunnel{Request, Response}Command and
HttpProxy{Request, Response}Command derived from
AbstractProxy{Request, Response}Command:
* src/FtpTunnelResponseCommand.h,
src/FtpTunnelResponseCommand.cc:
Derived from AbstractProxyRequestCommand class.
* src/FtpTunnelRequestCommand.h, src/FtpTunnelRequestCommand.cc:
Derived from AbstractProxyResponseCommand class.
* src/HttpProxyRequestCommand.h, src/HttpProxyRequestCommand.cc:
Derived from AbstractProxyRequestCommand class.
* src/HttpProxyResponseCommand.h,
src/HttpProxyResponseCommand.cc:
Derived from AbstractProxyResponseCommand class.
* src/AbstractProxyRequestCommand.h,
src/AbstractProxyRequestCommand.cc
: New class.
* src/AbstractProxyResponseCommand.h,
src/AbstractProxyResponseCommand.cc: New class.
To add netrc support:
* src/Netrc.h, src/Netrc.cc: New class.
* src/Util.h, src/Util.cc (split): New function.
* src/HttpHeader.cc (getRange): Fixed so that it inspects
"Content-Range" header instead of "Range" header.
* src/HttpHeader.h
(getStatus): Removed.
(setStatus): Removed.
* src/Segment.h
(getPositionToWrite): 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.
* src/AbstractCommand.cc
(execute): Check whether the download has finished before
checking
socket status.
Return true if peerStat->getStatus() == REQUEST_IDLE.
Do not exit even if no segment is available.
* src/prefs.h
(PREF_STARTUP_IDLE_TIME): New definition.
* src/PeerInteractionCommand.cc
(executeInternal): Removed max speed limit. Because it performs
bad.
(receiveMessages): Added max speed limit. This was better than
above,
but still a little bit to be desired. Sometimes the download
speed
became much faster than I specified.
* src/SpeedCalc.h
(start): New variable.
(accumulatedLength): New variable.
(getAvgSpeed): New function.
* src/SpeedCalc.cc
(reset): Added start, accumulatedLength.
(update): Added calculation of an average speed.
(getAvgSpeed): New function.
* src/DownloadCommand.h
(sw): Removed.
* src/main.cc
(main): Added PREF_STARTUP_IDLE_TIME.
* src/PeerStat.h
(STATUS): Added REQUEST_IDLE.
(getMaxSpeed): Renamed as getMaxDownloadSpeed().
(getAvgDownloadSpeed): New function
(requestIdle): New function.
* src/SegmentMan.h
(SegmentEntryHandle): New type definition.
(SegmentEntries): Now holds SegmentEntryHandle.
(findSlowerSegmentEntry): New funtion.
* src/SegmentMan.cc
(save): Updated according to the changes in SegmentEntries.
(read): Updated according to the changes in SegmentEntries.
(FindSegmentEntryByIndex): Updated according to the changes in
SegmentEntries.
(FindSegmentEntryByCuid): Updated according to the changes in
SegmentEntries.
(checkoutSegment): Updated according to the changes in
SegmentEntries.
(onNullBitfield): Updated according to the changes in
SegmentEntries.
Renamed uitr as itr.
(findSlowerSegmentEntry): New function.
(getSegment): Updated according to the changes in
SegmentEntries.
Added the feature that cancels the segment with slow server and
fast
one takes it over.
(cancelSegment): Updated according to the changes in
SegmentEntries.
(getDownloadLength): Updated according to the changes in
SegmentEntries.
(init): Assigned 0 to bitfield after deleting it.
* src/DownloadCommand.cc
(STARTUP_IDLE_TIME): Removed.
(executeInternal): Use PREF_STARTUP_IDLE_TIME.
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().
Tatsuhiro Tsujikawa