mirror of https://github.com/aria2/aria2
232 lines
7.2 KiB
C++
232 lines
7.2 KiB
C++
/* <!-- copyright */
|
|
/*
|
|
* aria2 - The high speed download utility
|
|
*
|
|
* Copyright (C) 2006 Tatsuhiro Tsujikawa
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* In addition, as a special exception, the copyright holders give
|
|
* permission to link the code of portions of this program with the
|
|
* OpenSSL library under certain conditions as described in each
|
|
* individual source file, and distribute linked combinations
|
|
* including the two.
|
|
* You must obey the GNU General Public License in all respects
|
|
* for all of the code used other than OpenSSL. If you modify
|
|
* file(s) with this exception, you may extend this exception to your
|
|
* version of the file(s), but you are not obligated to do so. If you
|
|
* do not wish to do so, delete this exception statement from your
|
|
* version. If you delete this exception statement from all source
|
|
* files in the program, then also delete it here.
|
|
*/
|
|
/* copyright --> */
|
|
#include "MultiDiskAdaptor.h"
|
|
#include "DefaultDiskWriter.h"
|
|
#include "DlAbortEx.h"
|
|
#include "message.h"
|
|
#include "Util.h"
|
|
#include <errno.h>
|
|
|
|
void MultiDiskAdaptor::resetDiskWriterEntries() {
|
|
diskWriterEntries.clear();
|
|
for(FileEntries::const_iterator itr = fileEntries.begin();
|
|
itr != fileEntries.end(); itr++) {
|
|
DiskWriterEntryHandle entry = new DiskWriterEntry(*itr);
|
|
if((*itr)->isRequested()) {
|
|
entry->setDiskWriter(DefaultDiskWriter::createNewDiskWriter(option));
|
|
} else {
|
|
entry->setDiskWriter(new DefaultDiskWriter());
|
|
}
|
|
diskWriterEntries.push_back(entry);
|
|
}
|
|
}
|
|
|
|
string MultiDiskAdaptor::getTopDirPath() const {
|
|
return storeDir+"/"+topDir;
|
|
}
|
|
|
|
void MultiDiskAdaptor::mkdir() const {
|
|
for(FileEntries::const_iterator itr = fileEntries.begin();
|
|
itr != fileEntries.end(); itr++) {
|
|
(*itr)->setupDir(getTopDirPath());
|
|
}
|
|
}
|
|
|
|
void MultiDiskAdaptor::openFile() {
|
|
mkdir();
|
|
resetDiskWriterEntries();
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end(); itr++) {
|
|
(*itr)->openFile(getTopDirPath());
|
|
}
|
|
}
|
|
|
|
void MultiDiskAdaptor::initAndOpenFile() {
|
|
mkdir();
|
|
resetDiskWriterEntries();
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end(); itr++) {
|
|
(*itr)->initAndOpenFile(getTopDirPath());
|
|
}
|
|
}
|
|
|
|
void MultiDiskAdaptor::openExistingFile() {
|
|
resetDiskWriterEntries();
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end(); itr++) {
|
|
(*itr)->openExistingFile(getTopDirPath());
|
|
}
|
|
}
|
|
|
|
void MultiDiskAdaptor::closeFile() {
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end(); itr++) {
|
|
(*itr)->closeFile();
|
|
}
|
|
}
|
|
|
|
void MultiDiskAdaptor::onDownloadComplete() {
|
|
closeFile();
|
|
openFile();
|
|
}
|
|
|
|
void MultiDiskAdaptor::writeData(const unsigned char* data, int32_t len,
|
|
int64_t offset)
|
|
{
|
|
int64_t fileOffset = offset;
|
|
bool writing = false;
|
|
int32_t rem = len;
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end() && rem != 0; itr++) {
|
|
if(isInRange(*itr, offset) || writing) {
|
|
int32_t writeLength = calculateLength(*itr, fileOffset, rem);
|
|
(*itr)->getDiskWriter()->writeData(data+(len-rem), writeLength, fileOffset);
|
|
rem -= writeLength;
|
|
writing = true;
|
|
fileOffset = 0;
|
|
} else {
|
|
fileOffset -= (*itr)->getFileEntry()->getLength();
|
|
}
|
|
}
|
|
if(!writing) {
|
|
throw new DlAbortEx(EX_FILE_OFFSET_OUT_OF_RANGE, offset);
|
|
}
|
|
}
|
|
|
|
bool MultiDiskAdaptor::isInRange(const DiskWriterEntryHandle entry,
|
|
int64_t offset) const
|
|
{
|
|
return entry->getFileEntry()->getOffset() <= offset &&
|
|
offset < entry->getFileEntry()->getOffset()+entry->getFileEntry()->getLength();
|
|
}
|
|
|
|
int32_t MultiDiskAdaptor::calculateLength(const DiskWriterEntryHandle entry,
|
|
int64_t fileOffset,
|
|
int32_t rem) const
|
|
{
|
|
int32_t length;
|
|
if(entry->getFileEntry()->getLength() < fileOffset+rem) {
|
|
length = entry->getFileEntry()->getLength()-fileOffset;
|
|
} else {
|
|
length = rem;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
int MultiDiskAdaptor::readData(unsigned char* data, int32_t len, int64_t offset)
|
|
{
|
|
int64_t fileOffset = offset;
|
|
bool reading = false;
|
|
int32_t rem = len;
|
|
int32_t totalReadLength = 0;
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end() && rem != 0; itr++) {
|
|
if(isInRange(*itr, offset) || reading) {
|
|
int32_t readLength = calculateLength((*itr), fileOffset, rem);
|
|
totalReadLength += (*itr)->getDiskWriter()->readData(data+(len-rem), readLength, fileOffset);
|
|
rem -= readLength;
|
|
reading = true;
|
|
fileOffset = 0;
|
|
} else {
|
|
fileOffset -= (*itr)->getFileEntry()->getLength();
|
|
}
|
|
}
|
|
if(!reading) {
|
|
throw new DlAbortEx(EX_FILE_OFFSET_OUT_OF_RANGE, offset);
|
|
}
|
|
return totalReadLength;
|
|
}
|
|
|
|
void MultiDiskAdaptor::hashUpdate(MessageDigestContext& ctx,
|
|
const DiskWriterEntryHandle& entry,
|
|
int64_t offset, int64_t length)
|
|
{
|
|
int32_t BUFSIZE = 16*1024;
|
|
unsigned char buf[BUFSIZE];
|
|
for(int64_t i = 0; i < length/BUFSIZE; i++) {
|
|
if(BUFSIZE != entry->getDiskWriter()->readData(buf, BUFSIZE, offset)) {
|
|
throw new DlAbortEx(EX_FILE_SHA1SUM, "", strerror(errno));
|
|
}
|
|
ctx.digestUpdate(buf, BUFSIZE);
|
|
offset += BUFSIZE;
|
|
}
|
|
int32_t r = length%BUFSIZE;
|
|
if(r > 0) {
|
|
if((int32_t)r != entry->getDiskWriter()->readData(buf, r, offset)) {
|
|
throw new DlAbortEx(EX_FILE_SHA1SUM, "", strerror(errno));
|
|
}
|
|
ctx.digestUpdate(buf, r);
|
|
}
|
|
}
|
|
|
|
string MultiDiskAdaptor::messageDigest(int64_t offset, int64_t length,
|
|
const MessageDigestContext::DigestAlgo& algo) {
|
|
int64_t fileOffset = offset;
|
|
bool reading = false;
|
|
int32_t rem = length;
|
|
MessageDigestContext ctx(algo);
|
|
ctx.digestInit();
|
|
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end() && rem != 0; itr++) {
|
|
if(isInRange(*itr, offset) || reading) {
|
|
int32_t readLength = calculateLength((*itr), fileOffset, rem);
|
|
hashUpdate(ctx, *itr, fileOffset, readLength);
|
|
rem -= readLength;
|
|
reading = true;
|
|
fileOffset = 0;
|
|
} else {
|
|
fileOffset -= (*itr)->getFileEntry()->getLength();
|
|
}
|
|
}
|
|
if(!reading) {
|
|
throw new DlAbortEx(EX_FILE_OFFSET_OUT_OF_RANGE, offset);
|
|
}
|
|
unsigned char hashValue[20];
|
|
ctx.digestFinal(hashValue);
|
|
return Util::toHex(hashValue, 20);
|
|
}
|
|
|
|
bool MultiDiskAdaptor::fileExists()
|
|
{
|
|
for(DiskWriterEntries::iterator itr = diskWriterEntries.begin();
|
|
itr != diskWriterEntries.end(); itr++) {
|
|
if((*itr)->fileExists(getTopDirPath())) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|