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Delete non-commited fastresume files

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Old v3.3.x format had a number at the end indicating the queue position.
The naming scheme was '<infohash>.fastresume.<queueposition>'.
However, QSaveFile, which uses QTemporaryFile internally, might leave
non-commited files behind eg after a crash. These files have the
naming scheme '<infohash>.fastresume.XXXXXX' where each X is a random
character. We try to detect the latter and remove it without "migrating"
the fastresume to the new saving system.
This commit is contained in:
sledgehammer999 2018-05-13 11:47:03 +03:00
parent 4b7ce87f57
commit 20e7aff393
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1 changed files with 18 additions and 3 deletions
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21
src/app/upgrade.h
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@ -114,12 +114,27 @@ bool upgradeResumeFile(const QString &filepath, const QVariantHash &oldTorrent =
bool v3_3 = false;
int queuePosition = 0;
QString outFilePath = filepath;
QRegExp rx(QLatin1String("([A-Fa-f0-9]{40})\\.fastresume\\.(\\d+)$"));
QRegExp rx(QLatin1String("([A-Fa-f0-9]{40})\\.fastresume\\.(.+)$"));
if (rx.indexIn(filepath) != -1) {
// old v3.3.x format
// Old v3.3.x format had a number at the end indicating the queue position.
// The naming scheme was '<infohash>.fastresume.<queueposition>'.
// However, QSaveFile, which uses QTemporaryFile internally, might leave
// non-commited files behind eg after a crash. These files have the
// naming scheme '<infohash>.fastresume.XXXXXX' where each X is a random
// character. So we detect if the last part is present. Then check if it
// is 6 chars long. If all the 6 chars are digits we assume it is an old
// v3.3.x format. Otherwise it is considered a non-commited fastresume
// and is deleted, because it may be a corrupted/incomplete fastresume.
// NOTE: When the upgrade code is removed, we must continue to perform
// cleanup of non-commited QSaveFile/QTemporaryFile fastresumes
queuePosition = rx.cap(2).toInt();
if ((rx.cap(2).size() == 6) && (queuePosition <= 99999)) {
Utils::Fs::forceRemove(filepath);
return true;
}
v3_3 = true;
outFilePath.replace(QRegExp("\\.\\d+$"), "");
outFilePath.replace(QRegExp("\\.fastresume\\..+$"), ".fastresume");
}
else {
queuePosition = fastOld.dict_find_int_value("qBt-queuePosition", 0);