2007-11-13 Tatsuhiro Tsujikawa <tujikawa at rednoah dot com>

	Added the ability to detect duplicate download entry which is 
about to
	download the same file other RequestGroup is downloading.
	* src/RequestGroup.cc
	* src/HttpResponseCommand.cc
	* src/FtpNegotiationCommand.cc

1 files changed, 6 insertions, 0 deletions

diff --git a/src/HttpResponseCommand.cc b/src/HttpResponseCommand.cc
index adfb63a8..a7d62346 100644
--- a/src/HttpResponseCommand.cc
+++ b/src/HttpResponseCommand.cc
@@ -49,6 +49,8 @@
 #include "DiskAdaptor.h"
 #include "PieceStorage.h"
 #include "DefaultBtProgressInfoFile.h"
+#include "RequestGroupMan.h"
+#include "DownloadFailureException.h"
 #include <sys/types.h>
 #include <unistd.h>
 
@@ -91,6 +93,10 @@ bool HttpResponseCommand::executeInternal()
     SingleFileDownloadContextHandle dctx = _requestGroup->getDownloadContext();
     dctx->setTotalLength(totalLength);
     dctx->setFilename(httpResponse->determinFilename());
+    if(e->_requestGroupMan->isSameFileBeingDownloaded(_requestGroup)) {
+      throw new DownloadFailureException(EX_DUPLICATE_FILE_DOWNLOAD,
+					 _requestGroup->getFilePath().c_str());
+    }
     if(totalLength == 0 || httpResponse->isTransferEncodingSpecified()) {
       // we ignore content-length when transfer-encoding is set
       dctx->setTotalLength(0);