986 lines
38 KiB
C++
986 lines
38 KiB
C++
/*
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* Copyright (C) by Olivier Goffart <ogoffart@owncloud.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "config.h"
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#include "owncloudpropagator_p.h"
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#include "propagatedownload.h"
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#include "networkjobs.h"
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#include "account.h"
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#include "common/syncjournaldb.h"
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#include "common/syncjournalfilerecord.h"
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#include "common/utility.h"
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#include "filesystem.h"
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#include "propagatorjobs.h"
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#include "common/checksums.h"
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#include "common/asserts.h"
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#include "clientsideencryptionjobs.h"
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#include "propagatedownloadencrypted.h"
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#include <QLoggingCategory>
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#include <QNetworkAccessManager>
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#include <QFileInfo>
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#include <QDir>
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#include <cmath>
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#ifdef Q_OS_UNIX
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#include <unistd.h>
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#endif
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namespace OCC {
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Q_LOGGING_CATEGORY(lcGetJob, "nextcloud.sync.networkjob.get", QtInfoMsg)
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Q_LOGGING_CATEGORY(lcPropagateDownload, "nextcloud.sync.propagator.download", QtInfoMsg)
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// Always coming in with forward slashes.
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// In csync_excluded_no_ctx we ignore all files with longer than 254 chars
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// This function also adds a dot at the beginning of the filename to hide the file on OS X and Linux
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QString OWNCLOUDSYNC_EXPORT createDownloadTmpFileName(const QString &previous)
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{
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QString tmpFileName;
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QString tmpPath;
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int slashPos = previous.lastIndexOf('/');
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// work with both pathed filenames and only filenames
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if (slashPos == -1) {
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tmpFileName = previous;
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tmpPath = QString();
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} else {
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tmpFileName = previous.mid(slashPos + 1);
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tmpPath = previous.left(slashPos);
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}
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int overhead = 1 + 1 + 2 + 8; // slash dot dot-tilde ffffffff"
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int spaceForFileName = qMin(254, tmpFileName.length() + overhead) - overhead;
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if (tmpPath.length() > 0) {
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return tmpPath + '/' + '.' + tmpFileName.left(spaceForFileName) + ".~" + (QString::number(uint(qrand() % 0xFFFFFFFF), 16));
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} else {
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return '.' + tmpFileName.left(spaceForFileName) + ".~" + (QString::number(uint(qrand() % 0xFFFFFFFF), 16));
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}
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}
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// DOES NOT take ownership of the device.
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GETFileJob::GETFileJob(AccountPtr account, const QString &path, QFile *device,
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const QMap<QByteArray, QByteArray> &headers, const QByteArray &expectedEtagForResume,
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quint64 resumeStart, QObject *parent)
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: AbstractNetworkJob(account, path, parent)
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, _device(device)
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, _headers(headers)
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, _expectedEtagForResume(expectedEtagForResume)
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, _resumeStart(resumeStart)
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, _errorStatus(SyncFileItem::NoStatus)
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, _bandwidthLimited(false)
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, _bandwidthChoked(false)
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, _bandwidthQuota(0)
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, _bandwidthManager(nullptr)
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, _hasEmittedFinishedSignal(false)
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, _lastModified()
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{
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}
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GETFileJob::GETFileJob(AccountPtr account, const QUrl &url, QFile *device,
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const QMap<QByteArray, QByteArray> &headers, const QByteArray &expectedEtagForResume,
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quint64 resumeStart, QObject *parent)
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: AbstractNetworkJob(account, url.toEncoded(), parent)
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, _device(device)
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, _headers(headers)
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, _expectedEtagForResume(expectedEtagForResume)
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, _resumeStart(resumeStart)
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, _errorStatus(SyncFileItem::NoStatus)
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, _directDownloadUrl(url)
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, _bandwidthLimited(false)
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, _bandwidthChoked(false)
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, _bandwidthQuota(0)
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, _bandwidthManager(nullptr)
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, _hasEmittedFinishedSignal(false)
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, _lastModified()
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{
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}
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void GETFileJob::start()
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{
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if (_resumeStart > 0) {
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_headers["Range"] = "bytes=" + QByteArray::number(_resumeStart) + '-';
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_headers["Accept-Ranges"] = "bytes";
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qCDebug(lcGetJob) << "Retry with range " << _headers["Range"];
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}
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QNetworkRequest req;
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for (QMap<QByteArray, QByteArray>::const_iterator it = _headers.begin(); it != _headers.end(); ++it) {
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req.setRawHeader(it.key(), it.value());
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}
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req.setPriority(QNetworkRequest::LowPriority); // Long downloads must not block non-propagation jobs.
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if (_directDownloadUrl.isEmpty()) {
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sendRequest("GET", makeDavUrl(path()), req);
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} else {
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// Use direct URL
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sendRequest("GET", _directDownloadUrl, req);
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}
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qCDebug(lcGetJob) << _bandwidthManager << _bandwidthChoked << _bandwidthLimited;
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if (_bandwidthManager) {
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_bandwidthManager->registerDownloadJob(this);
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}
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connect(this, &AbstractNetworkJob::networkActivity, account().data(), &Account::propagatorNetworkActivity);
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AbstractNetworkJob::start();
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}
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void GETFileJob::newReplyHook(QNetworkReply *reply)
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{
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reply->setReadBufferSize(16 * 1024); // keep low so we can easier limit the bandwidth
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connect(reply, &QNetworkReply::metaDataChanged, this, &GETFileJob::slotMetaDataChanged);
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connect(reply, &QIODevice::readyRead, this, &GETFileJob::slotReadyRead);
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connect(reply, &QNetworkReply::finished, this, &GETFileJob::slotReadyRead);
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connect(reply, &QNetworkReply::downloadProgress, this, &GETFileJob::downloadProgress);
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}
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void GETFileJob::slotMetaDataChanged()
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{
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// For some reason setting the read buffer in GETFileJob::start doesn't seem to go
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// through the HTTP layer thread(?)
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reply()->setReadBufferSize(16 * 1024);
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int httpStatus = reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
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// Ignore redirects
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if (httpStatus == 301 || httpStatus == 302 || httpStatus == 303 || httpStatus == 307 || httpStatus == 308)
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return;
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// If the status code isn't 2xx, don't write the reply body to the file.
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// For any error: handle it when the job is finished, not here.
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if (httpStatus / 100 != 2) {
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return;
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}
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if (reply()->error() != QNetworkReply::NoError) {
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return;
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}
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_etag = getEtagFromReply(reply());
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if (!_directDownloadUrl.isEmpty() && !_etag.isEmpty()) {
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qCInfo(lcGetJob) << "Direct download used, ignoring server ETag" << _etag;
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_etag = QByteArray(); // reset received ETag
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} else if (!_directDownloadUrl.isEmpty()) {
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// All fine, ETag empty and directDownloadUrl used
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} else if (_etag.isEmpty()) {
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qCWarning(lcGetJob) << "No E-Tag reply by server, considering it invalid";
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_errorString = tr("No E-Tag received from server, check Proxy/Gateway");
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_errorStatus = SyncFileItem::NormalError;
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reply()->abort();
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return;
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} else if (!_expectedEtagForResume.isEmpty() && _expectedEtagForResume != _etag) {
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qCWarning(lcGetJob) << "We received a different E-Tag for resuming!"
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<< _expectedEtagForResume << "vs" << _etag;
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_errorString = tr("We received a different E-Tag for resuming. Retrying next time.");
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_errorStatus = SyncFileItem::NormalError;
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reply()->abort();
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return;
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}
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quint64 start = 0;
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QByteArray ranges = reply()->rawHeader("Content-Range");
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if (!ranges.isEmpty()) {
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QRegExp rx("bytes (\\d+)-");
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if (rx.indexIn(ranges) >= 0) {
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start = rx.cap(1).toULongLong();
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}
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}
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if (start != _resumeStart) {
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qCWarning(lcGetJob) << "Wrong content-range: " << ranges << " while expecting start was" << _resumeStart;
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if (ranges.isEmpty()) {
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// device doesn't support range, just try again from scratch
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_device->close();
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if (!_device->open(QIODevice::WriteOnly)) {
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_errorString = _device->errorString();
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_errorStatus = SyncFileItem::NormalError;
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reply()->abort();
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return;
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}
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_resumeStart = 0;
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} else {
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_errorString = tr("Server returned wrong content-range");
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_errorStatus = SyncFileItem::NormalError;
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reply()->abort();
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return;
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}
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}
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auto lastModified = reply()->header(QNetworkRequest::LastModifiedHeader);
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if (!lastModified.isNull()) {
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_lastModified = Utility::qDateTimeToTime_t(lastModified.toDateTime());
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}
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_saveBodyToFile = true;
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}
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void GETFileJob::setBandwidthManager(BandwidthManager *bwm)
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{
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_bandwidthManager = bwm;
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}
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void GETFileJob::setChoked(bool c)
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{
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_bandwidthChoked = c;
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QMetaObject::invokeMethod(this, "slotReadyRead", Qt::QueuedConnection);
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}
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void GETFileJob::setBandwidthLimited(bool b)
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{
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_bandwidthLimited = b;
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QMetaObject::invokeMethod(this, "slotReadyRead", Qt::QueuedConnection);
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}
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void GETFileJob::giveBandwidthQuota(qint64 q)
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{
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_bandwidthQuota = q;
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qCDebug(lcGetJob) << "Got" << q << "bytes";
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QMetaObject::invokeMethod(this, "slotReadyRead", Qt::QueuedConnection);
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}
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qint64 GETFileJob::currentDownloadPosition()
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{
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if (_device && _device->pos() > 0 && _device->pos() > qint64(_resumeStart)) {
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return _device->pos();
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}
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return _resumeStart;
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}
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void GETFileJob::slotReadyRead()
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{
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if (!reply())
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return;
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int bufferSize = qMin(1024 * 8ll, reply()->bytesAvailable());
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QByteArray buffer(bufferSize, Qt::Uninitialized);
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while (reply()->bytesAvailable() > 0) {
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if (_bandwidthChoked) {
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qCWarning(lcGetJob) << "Download choked";
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break;
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}
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qint64 toRead = bufferSize;
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if (_bandwidthLimited) {
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toRead = qMin(qint64(bufferSize), _bandwidthQuota);
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if (toRead == 0) {
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qCWarning(lcGetJob) << "Out of quota";
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break;
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}
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_bandwidthQuota -= toRead;
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}
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qint64 r = reply()->read(buffer.data(), toRead);
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if (r < 0) {
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_errorString = networkReplyErrorString(*reply());
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_errorStatus = SyncFileItem::NormalError;
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qCWarning(lcGetJob) << "Error while reading from device: " << _errorString;
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reply()->abort();
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return;
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}
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qint64 w = _device->write(buffer.constData(), r);
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if (w != r) {
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_errorString = _device->errorString();
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_errorStatus = SyncFileItem::NormalError;
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qCWarning(lcGetJob) << "Error while writing to file" << w << r << _errorString;
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reply()->abort();
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return;
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}
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}
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if (reply()->isFinished() && reply()->bytesAvailable() == 0) {
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qCDebug(lcGetJob) << "Actually finished!";
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if (_bandwidthManager) {
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_bandwidthManager->unregisterDownloadJob(this);
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}
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if (!_hasEmittedFinishedSignal) {
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qCInfo(lcGetJob) << "GET of" << reply()->request().url().toString() << "FINISHED WITH STATUS"
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<< replyStatusString()
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<< reply()->rawHeader("Content-Range") << reply()->rawHeader("Content-Length");
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emit finishedSignal();
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}
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_hasEmittedFinishedSignal = true;
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deleteLater();
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}
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}
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void GETFileJob::onTimedOut()
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{
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qCWarning(lcGetJob) << "Timeout" << (reply() ? reply()->request().url() : path());
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if (!reply())
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return;
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_errorString = tr("Connection Timeout");
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_errorStatus = SyncFileItem::FatalError;
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reply()->abort();
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}
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QString GETFileJob::errorString() const
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{
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if (!_errorString.isEmpty()) {
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return _errorString;
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}
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return AbstractNetworkJob::errorString();
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}
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void PropagateDownloadFile::start()
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{
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if (propagator()->_abortRequested.fetchAndAddRelaxed(0))
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return;
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_isEncrypted = false;
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qCDebug(lcPropagateDownload) << _item->_file << propagator()->_activeJobList.count();
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if (propagator()->account()->capabilities().clientSideEncryptionAvaliable()) {
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_downloadEncryptedHelper = new PropagateDownloadEncrypted(propagator(), _item);
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connect(_downloadEncryptedHelper, &PropagateDownloadEncrypted::folderStatusNotEncrypted, [this] {
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startAfterIsEncryptedIsChecked();
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});
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connect(_downloadEncryptedHelper, &PropagateDownloadEncrypted::folderStatusEncrypted, [this] {
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_isEncrypted = true;
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startAfterIsEncryptedIsChecked();
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});
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connect(_downloadEncryptedHelper, &PropagateDownloadEncrypted::failed, [this] {
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done(SyncFileItem::NormalError,
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tr("File %1 can not be downloaded because encryption information is missing.").arg(QDir::toNativeSeparators(_item->_file)));
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});
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_downloadEncryptedHelper->start();
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} else {
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startAfterIsEncryptedIsChecked();
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}
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}
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void PropagateDownloadFile::startAfterIsEncryptedIsChecked()
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{
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_stopwatch.start();
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if (_deleteExisting) {
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deleteExistingFolder();
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// check for error with deletion
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if (_state == Finished) {
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return;
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}
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}
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// If we have a conflict where size of the file is unchanged,
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// compare the remote checksum to the local one.
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// Maybe it's not a real conflict and no download is necessary!
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// If the hashes are collision safe and identical, we assume the content is too.
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// For weak checksums, we only do that if the mtimes are also identical.
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if (_item->_instruction == CSYNC_INSTRUCTION_CONFLICT
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&& _item->_size == _item->_previousSize
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&& !_item->_checksumHeader.isEmpty()
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&& (csync_is_collision_safe_hash(_item->_checksumHeader)
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|| _item->_modtime == _item->_previousModtime)) {
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qCDebug(lcPropagateDownload) << _item->_file << "may not need download, computing checksum";
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auto computeChecksum = new ComputeChecksum(this);
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computeChecksum->setChecksumType(parseChecksumHeaderType(_item->_checksumHeader));
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connect(computeChecksum, &ComputeChecksum::done,
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this, &PropagateDownloadFile::conflictChecksumComputed);
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computeChecksum->start(propagator()->getFilePath(_item->_file));
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return;
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}
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startDownload();
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}
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void PropagateDownloadFile::conflictChecksumComputed(const QByteArray &checksumType, const QByteArray &checksum)
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{
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if (makeChecksumHeader(checksumType, checksum) == _item->_checksumHeader) {
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// No download necessary, just update fs and journal metadata
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qCDebug(lcPropagateDownload) << _item->_file << "remote and local checksum match";
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// Apply the server mtime locally if necessary, ensuring the journal
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// and local mtimes end up identical
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auto fn = propagator()->getFilePath(_item->_file);
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if (_item->_modtime != _item->_previousModtime) {
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FileSystem::setModTime(fn, _item->_modtime);
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emit propagator()->touchedFile(fn);
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}
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_item->_modtime = FileSystem::getModTime(fn);
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updateMetadata(/*isConflict=*/false);
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return;
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}
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startDownload();
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}
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void PropagateDownloadFile::startDownload()
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{
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if (propagator()->_abortRequested.fetchAndAddRelaxed(0))
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return;
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// do a klaas' case clash check.
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if (propagator()->localFileNameClash(_item->_file)) {
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done(SyncFileItem::NormalError, tr("File %1 can not be downloaded because of a local file name clash!").arg(QDir::toNativeSeparators(_item->_file)));
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return;
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}
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propagator()->reportProgress(*_item, 0);
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QString tmpFileName;
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QByteArray expectedEtagForResume;
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const SyncJournalDb::DownloadInfo progressInfo = propagator()->_journal->getDownloadInfo(_item->_file);
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if (progressInfo._valid) {
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// if the etag has changed meanwhile, remove the already downloaded part.
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if (progressInfo._etag != _item->_etag) {
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FileSystem::remove(propagator()->getFilePath(progressInfo._tmpfile));
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propagator()->_journal->setDownloadInfo(_item->_file, SyncJournalDb::DownloadInfo());
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} else {
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tmpFileName = progressInfo._tmpfile;
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expectedEtagForResume = progressInfo._etag;
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}
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}
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if (tmpFileName.isEmpty()) {
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tmpFileName = createDownloadTmpFileName(_item->_file);
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}
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_tmpFile.setFileName(propagator()->getFilePath(tmpFileName));
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if (!_tmpFile.open(QIODevice::Append | QIODevice::Unbuffered)) {
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done(SyncFileItem::NormalError, _tmpFile.errorString());
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return;
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}
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FileSystem::setFileHidden(_tmpFile.fileName(), true);
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_resumeStart = _tmpFile.size();
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if (_resumeStart > 0) {
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if (_resumeStart == _item->_size) {
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qCInfo(lcPropagateDownload) << "File is already complete, no need to download";
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_tmpFile.close();
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downloadFinished();
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return;
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}
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}
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// If there's not enough space to fully download this file, stop.
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const auto diskSpaceResult = propagator()->diskSpaceCheck();
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if (diskSpaceResult != OwncloudPropagator::DiskSpaceOk) {
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if (diskSpaceResult == OwncloudPropagator::DiskSpaceFailure) {
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// Using DetailError here will make the error not pop up in the account
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// tab: instead we'll generate a general "disk space low" message and show
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// these detail errors only in the error view.
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done(SyncFileItem::DetailError,
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tr("The download would reduce free local disk space below the limit"));
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emit propagator()->insufficientLocalStorage();
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} else if (diskSpaceResult == OwncloudPropagator::DiskSpaceCritical) {
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done(SyncFileItem::FatalError,
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tr("Free space on disk is less than %1").arg(Utility::octetsToString(criticalFreeSpaceLimit())));
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}
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// Remove the temporary, if empty.
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if (_resumeStart == 0) {
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_tmpFile.remove();
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}
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|
return;
|
|
}
|
|
|
|
{
|
|
SyncJournalDb::DownloadInfo pi;
|
|
pi._etag = _item->_etag;
|
|
pi._tmpfile = tmpFileName;
|
|
pi._valid = true;
|
|
propagator()->_journal->setDownloadInfo(_item->_file, pi);
|
|
propagator()->_journal->commit("download file start");
|
|
}
|
|
|
|
QMap<QByteArray, QByteArray> headers;
|
|
|
|
if (_item->_directDownloadUrl.isEmpty()) {
|
|
// Normal job, download from oC instance
|
|
_job = new GETFileJob(propagator()->account(),
|
|
propagator()->_remoteFolder + _item->_file,
|
|
&_tmpFile, headers, expectedEtagForResume, _resumeStart, this);
|
|
} else {
|
|
// We were provided a direct URL, use that one
|
|
qCInfo(lcPropagateDownload) << "directDownloadUrl given for " << _item->_file << _item->_directDownloadUrl;
|
|
|
|
if (!_item->_directDownloadCookies.isEmpty()) {
|
|
headers["Cookie"] = _item->_directDownloadCookies.toUtf8();
|
|
}
|
|
|
|
QUrl url = QUrl::fromUserInput(_item->_directDownloadUrl);
|
|
_job = new GETFileJob(propagator()->account(),
|
|
url,
|
|
&_tmpFile, headers, expectedEtagForResume, _resumeStart, this);
|
|
}
|
|
_job->setBandwidthManager(&propagator()->_bandwidthManager);
|
|
connect(_job.data(), &GETFileJob::finishedSignal, this, &PropagateDownloadFile::slotGetFinished);
|
|
connect(_job.data(), &GETFileJob::downloadProgress, this, &PropagateDownloadFile::slotDownloadProgress);
|
|
propagator()->_activeJobList.append(this);
|
|
_job->start();
|
|
}
|
|
|
|
qint64 PropagateDownloadFile::committedDiskSpace() const
|
|
{
|
|
if (_state == Running) {
|
|
return qBound(0ULL, _item->_size - _resumeStart - _downloadProgress, _item->_size);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void PropagateDownloadFile::setDeleteExistingFolder(bool enabled)
|
|
{
|
|
_deleteExisting = enabled;
|
|
}
|
|
|
|
const char owncloudCustomSoftErrorStringC[] = "owncloud-custom-soft-error-string";
|
|
void PropagateDownloadFile::slotGetFinished()
|
|
{
|
|
propagator()->_activeJobList.removeOne(this);
|
|
|
|
GETFileJob *job = _job;
|
|
ASSERT(job);
|
|
|
|
QNetworkReply::NetworkError err = job->reply()->error();
|
|
if (err != QNetworkReply::NoError) {
|
|
_item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
|
|
|
|
// If we sent a 'Range' header and get 416 back, we want to retry
|
|
// without the header.
|
|
const bool badRangeHeader = job->resumeStart() > 0 && _item->_httpErrorCode == 416;
|
|
if (badRangeHeader) {
|
|
qCWarning(lcPropagateDownload) << "server replied 416 to our range request, trying again without";
|
|
propagator()->_anotherSyncNeeded = true;
|
|
}
|
|
|
|
// Getting a 404 probably means that the file was deleted on the server.
|
|
const bool fileNotFound = _item->_httpErrorCode == 404;
|
|
if (fileNotFound) {
|
|
qCWarning(lcPropagateDownload) << "server replied 404, assuming file was deleted";
|
|
}
|
|
|
|
// Getting a 423 means that the file is locked
|
|
const bool fileLocked = _item->_httpErrorCode == 423;
|
|
if (fileLocked) {
|
|
qCWarning(lcPropagateDownload) << "server replied 423, file is Locked";
|
|
}
|
|
|
|
// Don't keep the temporary file if it is empty or we
|
|
// used a bad range header or the file's not on the server anymore.
|
|
if (_tmpFile.size() == 0 || badRangeHeader || fileNotFound) {
|
|
_tmpFile.close();
|
|
FileSystem::remove(_tmpFile.fileName());
|
|
propagator()->_journal->setDownloadInfo(_item->_file, SyncJournalDb::DownloadInfo());
|
|
}
|
|
|
|
if (!_item->_directDownloadUrl.isEmpty() && err != QNetworkReply::OperationCanceledError) {
|
|
// If this was with a direct download, retry without direct download
|
|
qCWarning(lcPropagateDownload) << "Direct download of" << _item->_directDownloadUrl << "failed. Retrying through owncloud.";
|
|
_item->_directDownloadUrl.clear();
|
|
start();
|
|
return;
|
|
}
|
|
|
|
// This gives a custom QNAM (by the user of libowncloudsync) to abort() a QNetworkReply in its metaDataChanged() slot and
|
|
// set a custom error string to make this a soft error. In contrast to the default hard error this won't bring down
|
|
// the whole sync and allows for a custom error message.
|
|
QNetworkReply *reply = job->reply();
|
|
if (err == QNetworkReply::OperationCanceledError && reply->property(owncloudCustomSoftErrorStringC).isValid()) {
|
|
job->setErrorString(reply->property(owncloudCustomSoftErrorStringC).toString());
|
|
job->setErrorStatus(SyncFileItem::SoftError);
|
|
} else if (badRangeHeader) {
|
|
// Can't do this in classifyError() because 416 without a
|
|
// Range header should result in NormalError.
|
|
job->setErrorStatus(SyncFileItem::SoftError);
|
|
} else if (fileNotFound) {
|
|
job->setErrorString(tr("File was deleted from server"));
|
|
job->setErrorStatus(SyncFileItem::SoftError);
|
|
|
|
// As a precaution against bugs that cause our database and the
|
|
// reality on the server to diverge, rediscover this folder on the
|
|
// next sync run.
|
|
propagator()->_journal->avoidReadFromDbOnNextSync(_item->_file);
|
|
}
|
|
|
|
SyncFileItem::Status status = job->errorStatus();
|
|
if (status == SyncFileItem::NoStatus) {
|
|
status = classifyError(err, _item->_httpErrorCode,
|
|
&propagator()->_anotherSyncNeeded);
|
|
}
|
|
|
|
done(status, job->errorString());
|
|
return;
|
|
}
|
|
|
|
if (!job->etag().isEmpty()) {
|
|
// The etag will be empty if we used a direct download URL.
|
|
// (If it was really empty by the server, the GETFileJob will have errored
|
|
_item->_etag = parseEtag(job->etag());
|
|
}
|
|
if (job->lastModified()) {
|
|
// It is possible that the file was modified on the server since we did the discovery phase
|
|
// so make sure we have the up-to-date time
|
|
_item->_modtime = job->lastModified();
|
|
}
|
|
_item->_responseTimeStamp = job->responseTimestamp();
|
|
|
|
_tmpFile.close();
|
|
_tmpFile.flush();
|
|
|
|
/* Check that the size of the GET reply matches the file size. There have been cases
|
|
* reported that if a server breaks behind a proxy, the GET is still a 200 but is
|
|
* truncated, as described here: https://github.com/owncloud/mirall/issues/2528
|
|
*/
|
|
const QByteArray sizeHeader("Content-Length");
|
|
quint64 bodySize = job->reply()->rawHeader(sizeHeader).toULongLong();
|
|
|
|
if (!job->reply()->rawHeader(sizeHeader).isEmpty() && _tmpFile.size() > 0 && bodySize == 0) {
|
|
// Strange bug with broken webserver or webfirewall https://github.com/owncloud/client/issues/3373#issuecomment-122672322
|
|
// This happened when trying to resume a file. The Content-Range header was files, Content-Length was == 0
|
|
qCDebug(lcPropagateDownload) << bodySize << _item->_size << _tmpFile.size() << job->resumeStart();
|
|
FileSystem::remove(_tmpFile.fileName());
|
|
done(SyncFileItem::SoftError, QLatin1String("Broken webserver returning empty content length for non-empty file on resume"));
|
|
return;
|
|
}
|
|
|
|
if (bodySize > 0 && bodySize != _tmpFile.size() - job->resumeStart()) {
|
|
qCDebug(lcPropagateDownload) << bodySize << _tmpFile.size() << job->resumeStart();
|
|
propagator()->_anotherSyncNeeded = true;
|
|
done(SyncFileItem::SoftError, tr("The file could not be downloaded completely."));
|
|
return;
|
|
}
|
|
|
|
if (_tmpFile.size() == 0 && _item->_size > 0) {
|
|
FileSystem::remove(_tmpFile.fileName());
|
|
done(SyncFileItem::NormalError,
|
|
tr("The downloaded file is empty despite that the server announced it should have been %1.")
|
|
.arg(Utility::octetsToString(_item->_size)));
|
|
return;
|
|
}
|
|
|
|
// Did the file come with conflict headers? If so, store them now!
|
|
// If we download conflict files but the server doesn't send conflict
|
|
// headers, the record will be established by SyncEngine::conflictRecordMaintenance.
|
|
// (we can't reliably determine the file id of the base file here,
|
|
// it might still be downloaded in a parallel job and not exist in
|
|
// the database yet!)
|
|
if (job->reply()->rawHeader("OC-Conflict") == "1") {
|
|
_conflictRecord.path = _item->_file.toUtf8();
|
|
_conflictRecord.baseFileId = job->reply()->rawHeader("OC-ConflictBaseFileId");
|
|
_conflictRecord.baseEtag = _job->reply()->rawHeader("OC-ConflictBaseEtag");
|
|
|
|
auto mtimeHeader = _job->reply()->rawHeader("OC-ConflictBaseMtime");
|
|
if (!mtimeHeader.isEmpty())
|
|
_conflictRecord.baseModtime = mtimeHeader.toLongLong();
|
|
|
|
// We don't set it yet. That will only be done when the download finished
|
|
// successfully, much further down. Here we just grab the headers because the
|
|
// job will be deleted later.
|
|
}
|
|
|
|
// Do checksum validation for the download. If there is no checksum header, the validator
|
|
// will also emit the validated() signal to continue the flow in slot transmissionChecksumValidated()
|
|
// as this is (still) also correct.
|
|
ValidateChecksumHeader *validator = new ValidateChecksumHeader(this);
|
|
connect(validator, &ValidateChecksumHeader::validated,
|
|
this, &PropagateDownloadFile::transmissionChecksumValidated);
|
|
connect(validator, &ValidateChecksumHeader::validationFailed,
|
|
this, &PropagateDownloadFile::slotChecksumFail);
|
|
auto checksumHeader = findBestChecksum(job->reply()->rawHeader(checkSumHeaderC));
|
|
auto contentMd5Header = job->reply()->rawHeader(contentMd5HeaderC);
|
|
if (checksumHeader.isEmpty() && !contentMd5Header.isEmpty())
|
|
checksumHeader = "MD5:" + contentMd5Header;
|
|
validator->start(_tmpFile.fileName(), checksumHeader);
|
|
}
|
|
|
|
void PropagateDownloadFile::slotChecksumFail(const QString &errMsg)
|
|
{
|
|
FileSystem::remove(_tmpFile.fileName());
|
|
propagator()->_anotherSyncNeeded = true;
|
|
done(SyncFileItem::SoftError, errMsg); // tr("The file downloaded with a broken checksum, will be redownloaded."));
|
|
}
|
|
|
|
void PropagateDownloadFile::deleteExistingFolder()
|
|
{
|
|
QString existingDir = propagator()->getFilePath(_item->_file);
|
|
if (!QFileInfo(existingDir).isDir()) {
|
|
return;
|
|
}
|
|
|
|
// Delete the directory if it is empty!
|
|
QDir dir(existingDir);
|
|
if (dir.entryList(QDir::NoDotAndDotDot | QDir::AllEntries).count() == 0) {
|
|
if (dir.rmdir(existingDir)) {
|
|
return;
|
|
}
|
|
// on error, just try to move it away...
|
|
}
|
|
|
|
QString error;
|
|
if (!propagator()->createConflict(_item, _associatedComposite, &error)) {
|
|
done(SyncFileItem::NormalError, error);
|
|
}
|
|
}
|
|
|
|
namespace { // Anonymous namespace for the recall feature
|
|
static QString makeRecallFileName(const QString &fn)
|
|
{
|
|
QString recallFileName(fn);
|
|
// Add _recall-XXXX before the extension.
|
|
int dotLocation = recallFileName.lastIndexOf('.');
|
|
// If no extension, add it at the end (take care of cases like foo/.hidden or foo.bar/file)
|
|
if (dotLocation <= recallFileName.lastIndexOf('/') + 1) {
|
|
dotLocation = recallFileName.size();
|
|
}
|
|
|
|
QString timeString = QDateTime::currentDateTimeUtc().toString("yyyyMMdd-hhmmss");
|
|
recallFileName.insert(dotLocation, "_.sys.admin#recall#-" + timeString);
|
|
|
|
return recallFileName;
|
|
}
|
|
|
|
void handleRecallFile(const QString &filePath, const QString &folderPath, SyncJournalDb &journal)
|
|
{
|
|
qCDebug(lcPropagateDownload) << "handleRecallFile: " << filePath;
|
|
|
|
FileSystem::setFileHidden(filePath, true);
|
|
|
|
QFile file(filePath);
|
|
if (!file.open(QIODevice::ReadOnly)) {
|
|
qCWarning(lcPropagateDownload) << "Could not open recall file" << file.errorString();
|
|
return;
|
|
}
|
|
QFileInfo existingFile(filePath);
|
|
QDir baseDir = existingFile.dir();
|
|
|
|
while (!file.atEnd()) {
|
|
QByteArray line = file.readLine();
|
|
line.chop(1); // remove trailing \n
|
|
|
|
QString recalledFile = QDir::cleanPath(baseDir.filePath(line));
|
|
if (!recalledFile.startsWith(folderPath) || !recalledFile.startsWith(baseDir.path())) {
|
|
qCWarning(lcPropagateDownload) << "Ignoring recall of " << recalledFile;
|
|
continue;
|
|
}
|
|
|
|
// Path of the recalled file in the local folder
|
|
QString localRecalledFile = recalledFile.mid(folderPath.size());
|
|
|
|
SyncJournalFileRecord record;
|
|
if (!journal.getFileRecord(localRecalledFile, &record) || !record.isValid()) {
|
|
qCWarning(lcPropagateDownload) << "No db entry for recall of" << localRecalledFile;
|
|
continue;
|
|
}
|
|
|
|
qCInfo(lcPropagateDownload) << "Recalling" << localRecalledFile << "Checksum:" << record._checksumHeader;
|
|
|
|
QString targetPath = makeRecallFileName(recalledFile);
|
|
|
|
qCDebug(lcPropagateDownload) << "Copy recall file: " << recalledFile << " -> " << targetPath;
|
|
// Remove the target first, QFile::copy will not overwrite it.
|
|
FileSystem::remove(targetPath);
|
|
QFile::copy(recalledFile, targetPath);
|
|
}
|
|
}
|
|
|
|
static void preserveGroupOwnership(const QString &fileName, const QFileInfo &fi)
|
|
{
|
|
#ifdef Q_OS_UNIX
|
|
int chownErr = chown(fileName.toLocal8Bit().constData(), -1, fi.groupId());
|
|
if (chownErr) {
|
|
// TODO: Consider further error handling!
|
|
qCWarning(lcPropagateDownload) << QString("preserveGroupOwnership: chown error %1: setting group %2 failed on file %3").arg(chownErr).arg(fi.groupId()).arg(fileName);
|
|
}
|
|
#else
|
|
Q_UNUSED(fileName);
|
|
Q_UNUSED(fi);
|
|
#endif
|
|
}
|
|
} // end namespace
|
|
|
|
void PropagateDownloadFile::transmissionChecksumValidated(const QByteArray &checksumType, const QByteArray &checksum)
|
|
{
|
|
const auto theContentChecksumType = contentChecksumType();
|
|
|
|
// Reuse transmission checksum as content checksum.
|
|
//
|
|
// We could do this more aggressively and accept both MD5 and SHA1
|
|
// instead of insisting on the exactly correct checksum type.
|
|
if (theContentChecksumType == checksumType || theContentChecksumType.isEmpty()) {
|
|
return contentChecksumComputed(checksumType, checksum);
|
|
}
|
|
|
|
// Compute the content checksum.
|
|
auto computeChecksum = new ComputeChecksum(this);
|
|
computeChecksum->setChecksumType(theContentChecksumType);
|
|
|
|
connect(computeChecksum, &ComputeChecksum::done,
|
|
this, &PropagateDownloadFile::contentChecksumComputed);
|
|
computeChecksum->start(_tmpFile.fileName());
|
|
}
|
|
|
|
void PropagateDownloadFile::contentChecksumComputed(const QByteArray &checksumType, const QByteArray &checksum)
|
|
{
|
|
_item->_checksumHeader = makeChecksumHeader(checksumType, checksum);
|
|
|
|
if (_isEncrypted) {
|
|
if (_downloadEncryptedHelper->decryptFile(_tmpFile)) {
|
|
downloadFinished();
|
|
} else {
|
|
done(SyncFileItem::NormalError, _downloadEncryptedHelper->errorString());
|
|
}
|
|
|
|
} else {
|
|
downloadFinished();
|
|
}
|
|
}
|
|
|
|
void PropagateDownloadFile::downloadFinished()
|
|
{
|
|
QString fn = propagator()->getFilePath(_item->_file);
|
|
|
|
// In case of file name clash, report an error
|
|
// This can happen if another parallel download saved a clashing file.
|
|
if (propagator()->localFileNameClash(_item->_file)) {
|
|
done(SyncFileItem::NormalError, tr("File %1 cannot be saved because of a local file name clash!").arg(QDir::toNativeSeparators(_item->_file)));
|
|
return;
|
|
}
|
|
|
|
bool isConflict = _item->_instruction == CSYNC_INSTRUCTION_CONFLICT
|
|
&& (QFileInfo(fn).isDir() || !FileSystem::fileEquals(fn, _tmpFile.fileName()));
|
|
if (isConflict) {
|
|
QString error;
|
|
if (!propagator()->createConflict(_item, _associatedComposite, &error)) {
|
|
done(SyncFileItem::SoftError, error);
|
|
return;
|
|
}
|
|
}
|
|
|
|
FileSystem::setModTime(_tmpFile.fileName(), _item->_modtime);
|
|
// We need to fetch the time again because some file systems such as FAT have worse than a second
|
|
// Accuracy, and we really need the time from the file system. (#3103)
|
|
_item->_modtime = FileSystem::getModTime(_tmpFile.fileName());
|
|
|
|
if (FileSystem::fileExists(fn)) {
|
|
// Preserve the existing file permissions.
|
|
QFileInfo existingFile(fn);
|
|
if (existingFile.permissions() != _tmpFile.permissions()) {
|
|
_tmpFile.setPermissions(existingFile.permissions());
|
|
}
|
|
preserveGroupOwnership(_tmpFile.fileName(), existingFile);
|
|
|
|
// Check whether the existing file has changed since the discovery
|
|
// phase by comparing size and mtime to the previous values. This
|
|
// is necessary to avoid overwriting user changes that happened between
|
|
// the discovery phase and now.
|
|
const qint64 expectedSize = _item->_previousSize;
|
|
const time_t expectedMtime = _item->_previousModtime;
|
|
if (!FileSystem::verifyFileUnchanged(fn, expectedSize, expectedMtime)) {
|
|
propagator()->_anotherSyncNeeded = true;
|
|
done(SyncFileItem::SoftError, tr("File has changed since discovery"));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Apply the remote permissions
|
|
FileSystem::setFileReadOnlyWeak(_tmpFile.fileName(), !_item->_remotePerm.isNull() && !_item->_remotePerm.hasPermission(RemotePermissions::CanWrite));
|
|
|
|
QString error;
|
|
emit propagator()->touchedFile(fn);
|
|
// The fileChanged() check is done above to generate better error messages.
|
|
if (!FileSystem::uncheckedRenameReplace(_tmpFile.fileName(), fn, &error)) {
|
|
qCWarning(lcPropagateDownload) << QString("Rename failed: %1 => %2").arg(_tmpFile.fileName()).arg(fn);
|
|
|
|
// If we moved away the original file due to a conflict but can't
|
|
// put the downloaded file in its place, we are in a bad spot:
|
|
// If we do nothing the next sync run will assume the user deleted
|
|
// the file!
|
|
// To avoid that, the file is removed from the metadata table entirely
|
|
// which makes it look like we're just about to initially download
|
|
// it.
|
|
if (isConflict) {
|
|
propagator()->_journal->deleteFileRecord(fn);
|
|
propagator()->_journal->commit("download finished");
|
|
}
|
|
|
|
// If the file is locked, we want to retry this sync when it
|
|
// becomes available again, otherwise try again directly
|
|
if (FileSystem::isFileLocked(fn)) {
|
|
emit propagator()->seenLockedFile(fn);
|
|
} else {
|
|
propagator()->_anotherSyncNeeded = true;
|
|
}
|
|
|
|
done(SyncFileItem::SoftError, error);
|
|
return;
|
|
}
|
|
FileSystem::setFileHidden(fn, false);
|
|
|
|
// Maybe we downloaded a newer version of the file than we thought we would...
|
|
// Get up to date information for the journal.
|
|
_item->_size = FileSystem::getSize(fn);
|
|
|
|
// Maybe what we downloaded was a conflict file? If so, set a conflict record.
|
|
// (the data was prepared in slotGetFinished above)
|
|
if (_conflictRecord.isValid())
|
|
propagator()->_journal->setConflictRecord(_conflictRecord);
|
|
|
|
updateMetadata(isConflict);
|
|
}
|
|
|
|
void PropagateDownloadFile::updateMetadata(bool isConflict)
|
|
{
|
|
QString fn = propagator()->getFilePath(_item->_file);
|
|
|
|
if (!propagator()->_journal->setFileRecord(_item->toSyncJournalFileRecordWithInode(fn))) {
|
|
done(SyncFileItem::FatalError, tr("Error writing metadata to the database"));
|
|
return;
|
|
}
|
|
|
|
if (_isEncrypted) {
|
|
propagator()->_journal->setDownloadInfo(_item->_file, SyncJournalDb::DownloadInfo());
|
|
} else {
|
|
propagator()->_journal->setDownloadInfo(_item->_encryptedFileName, SyncJournalDb::DownloadInfo());
|
|
}
|
|
|
|
propagator()->_journal->commit("download file start2");
|
|
done(isConflict ? SyncFileItem::Conflict : SyncFileItem::Success);
|
|
|
|
// handle the special recall file
|
|
if (!_item->_remotePerm.hasPermission(RemotePermissions::IsShared)
|
|
&& (_item->_file == QLatin1String(".sys.admin#recall#")
|
|
|| _item->_file.endsWith("/.sys.admin#recall#"))) {
|
|
handleRecallFile(fn, propagator()->_localDir, *propagator()->_journal);
|
|
}
|
|
|
|
qint64 duration = _stopwatch.elapsed();
|
|
if (isLikelyFinishedQuickly() && duration > 5 * 1000) {
|
|
qCWarning(lcPropagateDownload) << "WARNING: Unexpectedly slow connection, took" << duration << "msec for" << _item->_size - _resumeStart << "bytes for" << _item->_file;
|
|
}
|
|
}
|
|
|
|
void PropagateDownloadFile::slotDownloadProgress(qint64 received, qint64)
|
|
{
|
|
if (!_job)
|
|
return;
|
|
_downloadProgress = received;
|
|
propagator()->reportProgress(*_item, _resumeStart + received);
|
|
}
|
|
|
|
|
|
void PropagateDownloadFile::abort(PropagatorJob::AbortType abortType)
|
|
{
|
|
if (_job && _job->reply())
|
|
_job->reply()->abort();
|
|
|
|
if (abortType == AbortType::Asynchronous) {
|
|
emit abortFinished();
|
|
}
|
|
}
|
|
}
|