2006-09-19 Tatsuhiro Tsujikawa <tujikawa at rednoah dot com>

	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().

1 files changed, 12 insertions, 7 deletions

diff --git a/src/AbstractCommand.cc b/src/AbstractCommand.cc
index 907c7ee9..6a471277 100644
--- a/src/AbstractCommand.cc
+++ b/src/AbstractCommand.cc
@@ -48,16 +48,18 @@ bool AbstractCommand::execute() {
        checkSocketIsWritable && writeCheckTarget->isWritable(0) ||
        !checkSocketIsReadable && !checkSocketIsWritable) {
       checkPoint.reset();
-      Segment seg = { 0, 0, 0, false };
+      if(e->segmentMan->finished()) {
+	logger->debug("CUID#%d - finished.", cuid);
+	return true;
+      }
+      Segment segment;
       if(e->segmentMan->downloadStarted) {
-	// get segment information in order to set Range header.
-	if(!e->segmentMan->getSegment(seg, cuid)) {
-	  // no segment available
+	if(!e->segmentMan->getSegment(segment, cuid)) {
 	  logger->info(MSG_NO_SEGMENT_AVAILABLE, cuid);
 	  return true;
 	}
       }
-      return executeInternal(seg);
+      return executeInternal(segment);
     } else {
       if(checkPoint.elapsed(timeout)) {
 	throw new DlRetryEx(EX_TIME_OUT);
@@ -103,6 +105,7 @@ void AbstractCommand::tryReserved() {
 }
 
 bool AbstractCommand::prepareForRetry(int wait) {
+  e->segmentMan->cancelSegment(cuid);
   Command* command = InitiateConnectionCommandFactory::createInitiateConnectionCommand(cuid, req, e);
   if(wait == 0) {
     e->commands.push_back(command);
@@ -115,7 +118,8 @@ bool AbstractCommand::prepareForRetry(int wait) {
 
 void AbstractCommand::onAbort(Exception* ex) {
   logger->debug(MSG_UNREGISTER_CUID, cuid);
-  e->segmentMan->unregisterId(cuid);
+  //e->segmentMan->unregisterId(cuid);
+  e->segmentMan->cancelSegment(cuid);
 }
 
 void AbstractCommand::disableReadCheckSocket() {
@@ -193,7 +197,8 @@ bool AbstractCommand::resolveHostname(const string& hostname,
     return true;
     break;
   case NameResolver::STATUS_ERROR:
-    throw new DlRetryEx("CUID#%d - Name resolution failed:%s", cuid,
+    throw new DlAbortEx("CUID#%d - Name resolution for %s failed:%s", cuid,
+			hostname.c_str(),
 			resolver->getError().c_str());
   default:
     return false;