pollymc/logic/updater/DownloadUpdateTask.cpp

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/* Copyright 2013 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "DownloadUpdateTask.h"
#include "MultiMC.h"
#include "logic/updater/UpdateChecker.h"
#include "logic/net/NetJob.h"
#include "pathutils.h"
#include <QFile>
#include <QTemporaryDir>
#include <QCryptographicHash>
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#include <QDomDocument>
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DownloadUpdateTask::DownloadUpdateTask(QString repoUrl, int versionId, QObject *parent)
: Task(parent)
{
m_cVersionId = MMC->version().build;
m_nRepoUrl = repoUrl;
m_nVersionId = versionId;
m_updateFilesDir.setAutoRemove(false);
}
void DownloadUpdateTask::executeTask()
{
// GO!
// This will call the next step when it's done.
findCurrentVersionInfo();
}
void DownloadUpdateTask::processChannels()
{
auto checker = MMC->updateChecker();
// Now, check the channel list again.
if (!checker->hasChannels())
{
// We still couldn't load the channel list. Give up. Call loadVersionInfo and return.
QLOG_INFO() << "Reloading the channel list didn't work. Giving up.";
loadVersionInfo();
return;
}
QList<UpdateChecker::ChannelListEntry> channels = checker->getChannelList();
QString channelId = MMC->version().channel;
// Search through the channel list for a channel with the correct ID.
for (auto channel : channels)
{
if (channel.id == channelId)
{
QLOG_INFO() << "Found matching channel.";
m_cRepoUrl = preparePath(channel.url);
break;
}
}
// Now that we've done that, load version info.
loadVersionInfo();
}
void DownloadUpdateTask::findCurrentVersionInfo()
{
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setStatus(tr("Finding information about the current version..."));
auto checker = MMC->updateChecker();
if (!checker->hasChannels())
{
// Load the channel list and wait for it to finish loading.
QLOG_INFO() << "No channel list entries found. Will try reloading it.";
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QObject::connect(checker.get(), &UpdateChecker::channelListLoaded, this,
&DownloadUpdateTask::processChannels);
checker->updateChanList();
}
else
{
processChannels();
}
}
void DownloadUpdateTask::loadVersionInfo()
{
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setStatus(tr("Loading version information..."));
// Create the net job for loading version info.
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NetJob *netJob = new NetJob("Version Info");
// Find the index URL.
QUrl newIndexUrl = QUrl(m_nRepoUrl).resolved(QString::number(m_nVersionId) + ".json");
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QLOG_DEBUG() << m_nRepoUrl << " turns into " << newIndexUrl;
// Add a net action to download the version info for the version we're updating to.
netJob->addNetAction(ByteArrayDownload::make(newIndexUrl));
// If we have a current version URL, get that one too.
if (!m_cRepoUrl.isEmpty())
{
QUrl cIndexUrl = QUrl(m_cRepoUrl).resolved(QString::number(m_cVersionId) + ".json");
netJob->addNetAction(ByteArrayDownload::make(cIndexUrl));
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QLOG_DEBUG() << m_cRepoUrl << " turns into " << cIndexUrl;
}
// Connect slots so we know when it's done.
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QObject::connect(netJob, &NetJob::succeeded, this,
&DownloadUpdateTask::vinfoDownloadFinished);
QObject::connect(netJob, &NetJob::failed, this, &DownloadUpdateTask::vinfoDownloadFailed);
// Store the NetJob in a class member. We don't want to lose it!
m_vinfoNetJob.reset(netJob);
// Finally, we start the network job and the thread's event loop to wait for it to finish.
netJob->start();
}
void DownloadUpdateTask::vinfoDownloadFinished()
{
// Both downloads succeeded. OK. Parse stuff.
parseDownloadedVersionInfo();
}
void DownloadUpdateTask::vinfoDownloadFailed()
{
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// Something failed. We really need the second download (current version info), so parse
// downloads anyways as long as the first one succeeded.
if (m_vinfoNetJob->first()->m_status != Job_Failed)
{
parseDownloadedVersionInfo();
return;
}
// TODO: Give a more detailed error message.
QLOG_ERROR() << "Failed to download version info files.";
emitFailed(tr("Failed to download version info files."));
}
void DownloadUpdateTask::parseDownloadedVersionInfo()
{
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setStatus(tr("Reading file list for new version..."));
QLOG_DEBUG() << "Reading file list for new version...";
QString error;
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if (!parseVersionInfo(
std::dynamic_pointer_cast<ByteArrayDownload>(m_vinfoNetJob->first())->m_data,
&m_nVersionFileList, &error))
{
emitFailed(error);
return;
}
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// If there is a second entry in the network job's list, load it as the current version's
// info.
if (m_vinfoNetJob->size() >= 2 && m_vinfoNetJob->operator[](1)->m_status != Job_Failed)
{
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setStatus(tr("Reading file list for current version..."));
QLOG_DEBUG() << "Reading file list for current version...";
QString error;
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parseVersionInfo(
std::dynamic_pointer_cast<ByteArrayDownload>(m_vinfoNetJob->operator[](1))->m_data,
&m_cVersionFileList, &error);
}
// We don't need this any more.
m_vinfoNetJob.reset();
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// Now that we're done loading version info, we can move on to the next step. Process file
// lists and download files.
processFileLists();
}
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bool DownloadUpdateTask::parseVersionInfo(const QByteArray &data, VersionFileList *list,
QString *error)
{
QJsonParseError jsonError;
QJsonDocument jsonDoc = QJsonDocument::fromJson(data, &jsonError);
if (jsonError.error != QJsonParseError::NoError)
{
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*error = QString("Failed to parse version info JSON: %1 at %2")
.arg(jsonError.errorString())
.arg(jsonError.offset);
QLOG_ERROR() << error;
return false;
}
QJsonObject json = jsonDoc.object();
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QLOG_DEBUG() << data;
QLOG_DEBUG() << "Loading version info from JSON.";
QJsonArray filesArray = json.value("Files").toArray();
for (QJsonValue fileValue : filesArray)
{
QJsonObject fileObj = fileValue.toObject();
VersionFileEntry file{
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fileObj.value("Path").toString(), fileObj.value("Perms").toVariant().toInt(),
FileSourceList(), fileObj.value("MD5").toString(), };
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QLOG_DEBUG() << "File" << file.path << "with perms" << file.mode;
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QJsonArray sourceArray = fileObj.value("Sources").toArray();
for (QJsonValue val : sourceArray)
{
QJsonObject sourceObj = val.toObject();
QString type = sourceObj.value("SourceType").toString();
if (type == "http")
{
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file.sources.append(
FileSource("http", preparePath(sourceObj.value("Url").toString())));
}
else if (type == "httpc")
{
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file.sources.append(FileSource("httpc",
preparePath(sourceObj.value("Url").toString()),
sourceObj.value("CompressionType").toString()));
}
else
{
QLOG_WARN() << "Unknown source type" << type << "ignored.";
}
}
QLOG_DEBUG() << "Loaded info for" << file.path;
list->append(file);
}
return true;
}
void DownloadUpdateTask::processFileLists()
{
// Create a network job for downloading files.
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NetJob *netJob = new NetJob("Update Files");
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if (!processFileLists(netJob, m_cVersionFileList, m_nVersionFileList, m_operationList))
{
emitFailed(tr("Failed to process update lists..."));
return;
}
// Add listeners to wait for the downloads to finish.
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QObject::connect(netJob, &NetJob::succeeded, this,
&DownloadUpdateTask::fileDownloadFinished);
QObject::connect(netJob, &NetJob::progress, this,
&DownloadUpdateTask::fileDownloadProgressChanged);
QObject::connect(netJob, &NetJob::failed, this, &DownloadUpdateTask::fileDownloadFailed);
// Now start the download.
setStatus(tr("Downloading %1 update files.").arg(QString::number(netJob->size())));
QLOG_DEBUG() << "Begin downloading update files to" << m_updateFilesDir.path();
m_filesNetJob.reset(netJob);
netJob->start();
writeInstallScript(m_operationList, PathCombine(m_updateFilesDir.path(), "file_list.xml"));
}
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bool
DownloadUpdateTask::processFileLists(NetJob *job,
const DownloadUpdateTask::VersionFileList &currentVersion,
const DownloadUpdateTask::VersionFileList &newVersion,
DownloadUpdateTask::UpdateOperationList &ops)
{
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setStatus(tr("Processing file lists - figuring out how to install the update..."));
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// First, if we've loaded the current version's file list, we need to iterate through it and
// delete anything in the current one version's list that isn't in the new version's list.
for (VersionFileEntry entry : currentVersion)
{
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QFileInfo toDelete(entry.path);
if (!toDelete.exists())
{
QLOG_ERROR() << "Expected file " << toDelete.absoluteFilePath()
<< " doesn't exist!";
QLOG_ERROR() << "CWD: " << QDir::currentPath();
}
bool keep = false;
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//
for (VersionFileEntry newEntry : newVersion)
{
if (newEntry.path == entry.path)
{
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QLOG_DEBUG() << "Not deleting" << entry.path
<< "because it is still present in the new version.";
keep = true;
break;
}
}
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// If the loop reaches the end and we didn't find a match, delete the file.
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if (!keep)
{
QFileInfo toDelete(entry.path);
if (toDelete.exists())
ops.append(UpdateOperation::DeleteOp(entry.path));
}
}
// Next, check each file in MultiMC's folder and see if we need to update them.
for (VersionFileEntry entry : newVersion)
{
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// TODO: Let's not MD5sum a ton of files on the GUI thread. We should probably find a
// way to do this in the background.
QString fileMD5;
QFile entryFile(entry.path);
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QFileInfo entryInfo(entry.path);
bool needs_upgrade = false;
if (!entryFile.exists())
{
needs_upgrade = true;
}
else
{
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bool pass = true;
if (!entryInfo.isReadable())
{
QLOG_ERROR() << "File " << entry.path << " is not readable.";
pass = false;
}
if (!entryInfo.isWritable())
{
QLOG_ERROR() << "File " << entry.path << " is not writable.";
pass = false;
}
if (!entryFile.open(QFile::ReadOnly))
{
QLOG_ERROR() << "File " << entry.path << " cannot be opened for reading.";
pass = false;
}
if (!pass)
{
QLOG_ERROR() << "CWD: " << QDir::currentPath();
ops.clear();
return false;
}
}
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QCryptographicHash hash(QCryptographicHash::Md5);
auto foo = entryFile.readAll();
hash.addData(foo);
fileMD5 = hash.result().toHex();
if ((fileMD5 != entry.md5))
{
QLOG_DEBUG() << "MD5Sum does not match!";
QLOG_DEBUG() << "Expected:'" << entry.md5 << "'";
QLOG_DEBUG() << "Got: '" << fileMD5 << "'";
needs_upgrade = true;
}
// skip file. it doesn't need an upgrade.
if (!needs_upgrade)
{
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QLOG_DEBUG() << "File" << entry.path << " does not need updating.";
continue;
}
// yep. this file actually needs an upgrade. PROCEED.
QLOG_DEBUG() << "Found file" << entry.path << " that needs updating.";
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// if it's the updater we want to treat it separately
bool isUpdater = entry.path.endsWith("updater") || entry.path.endsWith("updater.exe");
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// Go through the sources list and find one to use.
// TODO: Make a NetAction that takes a source list and tries each of them until one
// works. For now, we'll just use the first http one.
for (FileSource source : entry.sources)
{
if (source.type == "http")
{
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QLOG_DEBUG() << "Will download" << entry.path << "from" << source.url;
// Download it to updatedir/<filepath>-<md5> where filepath is the file's
// path with slashes replaced by underscores.
QString dlPath =
PathCombine(m_updateFilesDir.path(), QString(entry.path).replace("/", "_"));
if (job)
{
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// We need to download the file to the updatefiles folder and add a task
// to copy it to its install path.
auto download = MD5EtagDownload::make(source.url, dlPath);
download->m_expected_md5 = entry.md5;
job->addNetAction(download);
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if (isUpdater)
{
download->setProperty("finalPath", entry.path);
connect(download.get(), &MD5EtagDownload::succeeded, this, &DownloadUpdateTask::directDeployFile);
}
}
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if (!isUpdater)
{
// Now add a copy operation to our operations list to install the file.
ops.append(UpdateOperation::CopyOp(dlPath, entry.path, entry.mode));
}
}
}
}
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return true;
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}
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bool DownloadUpdateTask::writeInstallScript(UpdateOperationList &opsList, QString scriptFile)
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{
// Build the base structure of the XML document.
QDomDocument doc;
QDomElement root = doc.createElement("update");
root.setAttribute("version", "3");
doc.appendChild(root);
QDomElement installFiles = doc.createElement("install");
root.appendChild(installFiles);
QDomElement removeFiles = doc.createElement("uninstall");
root.appendChild(removeFiles);
// Write the operation list to the XML document.
for (UpdateOperation op : opsList)
{
QDomElement file = doc.createElement("file");
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QString native_file = QDir::toNativeSeparators(op.file);
QString native_dest = QDir::toNativeSeparators(op.dest);
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switch (op.type)
{
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case UpdateOperation::OP_COPY:
{
// Install the file.
QDomElement name = doc.createElement("source");
QDomElement path = doc.createElement("dest");
QDomElement mode = doc.createElement("mode");
name.appendChild(doc.createTextNode(native_file));
path.appendChild(doc.createTextNode(native_dest));
// We need to add a 0 at the beginning here, because Qt doesn't convert to octal
// correctly.
mode.appendChild(doc.createTextNode("0" + QString::number(op.mode, 8)));
file.appendChild(name);
file.appendChild(path);
file.appendChild(mode);
installFiles.appendChild(file);
QLOG_DEBUG() << "Will install file" << native_file;
}
break;
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case UpdateOperation::OP_DELETE:
{
// Delete the file.
file.appendChild(doc.createTextNode(native_file));
removeFiles.appendChild(file);
QLOG_DEBUG() << "Will remove file" << native_file;
}
break;
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default:
QLOG_WARN() << "Can't write update operation of type" << op.type
<< "to file. Not implemented.";
continue;
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}
}
// Write the XML document to the file.
QFile outFile(scriptFile);
if (outFile.open(QIODevice::WriteOnly))
{
outFile.write(doc.toByteArray());
}
else
{
emitFailed(tr("Failed to write update script file."));
return false;
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}
return true;
}
QString DownloadUpdateTask::preparePath(const QString &path)
{
if(path.startsWith("$PWD"))
{
QString foo = path;
foo.replace("$PWD", qApp->applicationDirPath());
return QUrl::fromLocalFile(foo).toString(QUrl::FullyEncoded);
}
return path;
}
void DownloadUpdateTask::fileDownloadFinished()
{
emitSucceeded();
}
void DownloadUpdateTask::fileDownloadFailed()
{
// TODO: Give more info about the failure.
QLOG_ERROR() << "Failed to download update files.";
emitFailed(tr("Failed to download update files."));
}
void DownloadUpdateTask::fileDownloadProgressChanged(qint64 current, qint64 total)
{
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setProgress((int)(((float)current / (float)total) * 100));
}
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void DownloadUpdateTask::directDeployFile(const int index)
{
Md5EtagDownloadPtr download = std::dynamic_pointer_cast<MD5EtagDownload>(m_filesNetJob->operator[](index));
const QString finalPath = download->property("finalPath").toString();
QLOG_INFO() << "Replacing" << finalPath << "with" << download->m_output_file.fileName();
if (QFile::remove(finalPath))
{
if (download->m_output_file.copy(finalPath))
{
return;
}
}
emitFailed("Couldn't copy updater files");
}
QString DownloadUpdateTask::updateFilesDir()
{
return m_updateFilesDir.path();
}