FGFS-4.1/OpenSceneGraph
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Added the local_cache_dir option to the net plug-in allowing for the

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keeping and populating of a local cache.  With this option, the cache
is checked first before fetching from the network.
This commit is contained in:
Don BURNS 2004-08-30 01:15:49 +00:00
parent 6a82bb28fc
commit 0724243959
2 changed files with 50 additions and 9 deletions
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1
src/osgPlugins/net/GNUmakefile
View File

@ -5,6 +5,7 @@ CXXFILES =\
ReaderWriterNET.cpp\
sockinet.cpp\
sockstream.cpp\
makeDir.cpp\
LIBS += $(OSG_LIBS) $(OTHER_LIBS)

58
src/osgPlugins/net/ReaderWriterNET.cpp
View File

@ -1,18 +1,19 @@
#include <iostream>
#include <fstream>
#include <sstream>
#include <osg/Notify>
#include <osgDB/Input>
#include <osgDB/Registry>
#include <osgDB/FileNameUtils>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgDB/FileUtils>
#include <osg/MatrixTransform>
#include <osg/Group>
#include "sockinet.h"
#include "makeDir.h"
/*
* Semantics:
@ -47,7 +48,8 @@ class NetReader : public osgDB::ReaderWriter
virtual ReadResult readNode(const std::string& inFileName, const Options *options )
{
std::string hostname;
std::string server_prefix;
std::string serverPrefix;
std::string localCacheDir;
int port = 80;
if (options)
@ -68,13 +70,22 @@ class NetReader : public osgDB::ReaderWriter
port = atoi( opt.substr(index+1).c_str() );
}
else if( opt.substr( 0, index ) == "server_prefix" ||
opt.substr( 0, index ) == "server_prefix" )
opt.substr( 0, index ) == "SERVER_PREFIX" ||
opt.substr( 0, index ) == "prefix" ||
opt.substr( 0, index ) == "PREFIX" )
{
server_prefix = opt.substr(index+1);
serverPrefix = opt.substr(index+1);
}
else if( opt.substr( 0, index ) == "local_cache_dir" ||
opt.substr( 0, index ) == "LOCAL_CACHE_DIR" )
{
localCacheDir = opt.substr(index+1);
}
}
}
ReadResult readResult = ReadResult::FILE_NOT_HANDLED;
/* * we accept all extensions
std::string ext = osgDB::getFileExtension(inFileName);
if (!acceptsExtension(ext))
@ -106,6 +117,30 @@ class NetReader : public osgDB::ReaderWriter
fileName = fileName.substr( 0, rindex );
}
if( !serverPrefix.empty() )
fileName = serverPrefix + '/' + fileName;
// Invoke the reader corresponding to the extension
osgDB::ReaderWriter *reader =
osgDB::Registry::instance()->getReaderWriterForExtension( osgDB::getFileExtension(fileName));
if( reader == 0L )
return ReadResult::FILE_NOT_HANDLED;
// Before we go to the network, lets see if it is in local cache, if cache
// was specified
if( !localCacheDir.empty() )
{
std::string cacheFile = localCacheDir + '/' + fileName;
if( osgDB::fileExists( cacheFile ))
{
std::ifstream in(cacheFile.c_str());
readResult = reader->readNode( in );
in.close();
return readResult;
}
}
// Fetch from the network
iosockinet sio (sockbuf::sock_stream);
try {
sio->connect( hostname.c_str(), port );
@ -116,9 +151,6 @@ class NetReader : public osgDB::ReaderWriter
return ReadResult::FILE_NOT_FOUND;
}
if( !server_prefix.empty() )
fileName = server_prefix + '/' + fileName;
sio << "GET /" << fileName << " HTTP/1.1\n" << "Host:\n\n";
sio.flush();
@ -176,14 +208,22 @@ class NetReader : public osgDB::ReaderWriter
} while( linebuff[0] != '\r' );
/*
// Invoke the reader corresponding to the extension
osgDB::ReaderWriter *reader =
osgDB::Registry::instance()->getReaderWriterForExtension( osgDB::getFileExtension(fileName));
*/
ReadResult readResult = ReadResult::FILE_NOT_HANDLED;
if( reader != 0L )
readResult = reader->readNode( sio );
if( !localCacheDir.empty() )
{
std::string cacheFile = localCacheDir + '/' + fileName;
if( TemporaryFileUtils::makeDirectory( cacheFile ) )
osgDB::writeNodeFile( *(readResult.getNode()), cacheFile );
}
return readResult;
}
};