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// **********************************************************************
//
// Copyright (c) 2003-2005 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#include <IcePatch2/FileServerI.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef _WIN32
# include <io.h>
#else
# include <unistd.h>
#endif
using namespace std;
using namespace Ice;
using namespace IcePatch2;
IcePatch2::FileServerI::FileServerI(const std::string& dataDir, const FileInfoSeq& infoSeq) :
_dataDir(dataDir), _tree0(FileTree0())
{
FileTree0& tree0 = const_cast<FileTree0&>(_tree0);
getFileTree0(infoSeq, tree0);
}
FileInfoSeq
IcePatch2::FileServerI::getFileInfoSeq(Int node0, const Current&) const
{
if(node0 < 0 || node0 > 255)
{
throw PartitionOutOfRangeException();
}
return _tree0.nodes[node0].files;
}
ByteSeqSeq
IcePatch2::FileServerI::getChecksumSeq(const Current&) const
{
ByteSeqSeq checksums(256);
for(int node0 = 0; node0 < 256; ++node0)
{
checksums[node0] = _tree0.nodes[node0].checksum;
}
return checksums;
}
ByteSeq
IcePatch2::FileServerI::getChecksum(const Current&) const
{
return _tree0.checksum;
}
ByteSeq
IcePatch2::FileServerI::getFileCompressed(const string& pa, Int pos, Int num, const Current&) const
{
if(isAbsolute(pa))
{
FileAccessException ex;
ex.reason = "illegal absolute path `" + pa + "'";
throw ex;
}
string path = simplify(_dataDir + '/' + pa);
path += ".bz2";
string::size_type slashPos = path.find('/');
while(slashPos != string::npos)
{
string::size_type endPos = path.find('/', slashPos + 1);
if(path.substr(slashPos + 1, endPos - slashPos - 1) == "..")
{
FileAccessException ex;
ex.reason = "illegal `..' component in path `" + pa + "'";
throw ex;
}
slashPos = endPos;
}
if(num <= 0 || pos < 0)
{
return ByteSeq();
}
#ifdef _WIN32
int fd = open(path.c_str(), _O_RDONLY | _O_BINARY);
#else
int fd = open(path.c_str(), O_RDONLY);
#endif
if(fd == -1)
{
FileAccessException ex;
ex.reason = "cannot open `" + path + "' for reading: " + strerror(errno);
throw ex;
}
if(lseek(fd, static_cast<off_t>(pos), SEEK_SET) != static_cast<off_t>(pos))
{
close(fd);
ostringstream posStr;
posStr << pos;
FileAccessException ex;
ex.reason = "cannot seek position " + posStr.str() + " in file `" + path + "': " + strerror(errno);
throw ex;
}
ByteSeq bytes(num);
#ifdef _WIN32
long r;
#else
ssize_t r;
#endif
if((r = read(fd, &bytes[0], static_cast<size_t>(num))) == -1)
{
close(fd);
FileAccessException ex;
ex.reason = "cannot read `" + path + "': " + strerror(errno);
throw ex;
}
close(fd);
bytes.resize(r);
return bytes;
}
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