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Fix issues with the updater

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* Bad URLs used for downloading update files
* MD5ETagDownload resetting the expected ETag after failure to the failed file MD5 checksum
* Delete MD5ETagDownload downloaded files if the download fails.
This commit is contained in:
Petr Mrázek 2013-12-21 14:25:16 +01:00
parent 0f6ad12fd8
commit 01dbebdfc8
3 changed files with 37 additions and 20 deletions
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32
logic/net/MD5EtagDownload.cpp
View File

@ -23,7 +23,6 @@ MD5EtagDownload::MD5EtagDownload(QUrl url, QString target_path) : NetAction()
{
m_url = url;
m_target_path = target_path;
m_check_md5 = false;
m_status = Job_NotStarted;
}
@ -34,22 +33,26 @@ void MD5EtagDownload::start()
// if there already is a file and md5 checking is in effect and it can be opened
if (m_output_file.exists() && m_output_file.open(QIODevice::ReadOnly))
{
// check the md5 against the expected one
QString hash =
// get the md5 of the local file.
m_local_md5 =
QCryptographicHash::hash(m_output_file.readAll(), QCryptographicHash::Md5)
.toHex()
.constData();
m_output_file.close();
// skip this file if they match
if (m_check_md5 && hash == m_expected_md5)
// if we are expecting some md5sum, compare it with the local one
if (!m_expected_md5.isEmpty())
{
// skip if they match
if(m_local_md5 == m_expected_md5)
{
QLOG_INFO() << "Skipping " << m_url.toString() << ": md5 match.";
emit succeeded(m_index_within_job);
return;
}
}
else
{
m_expected_md5 = hash;
// no expected md5. we use the local md5sum as an ETag
}
}
if (!ensureFilePathExists(filename))
@ -58,9 +61,18 @@ void MD5EtagDownload::start()
return;
}
QLOG_INFO() << "Downloading " << m_url.toString() << " expecting " << m_expected_md5;
QNetworkRequest request(m_url);
request.setRawHeader(QString("If-None-Match").toLatin1(), m_expected_md5.toLatin1());
QLOG_INFO() << "Downloading " << m_url.toString() << " got " << m_local_md5;
if(!m_local_md5.isEmpty())
{
QLOG_INFO() << "Got " << m_local_md5;
request.setRawHeader(QString("If-None-Match").toLatin1(), m_local_md5.toLatin1());
}
if(!m_expected_md5.isEmpty())
QLOG_INFO() << "Expecting " << m_expected_md5;
request.setHeader(QNetworkRequest::UserAgentHeader, "MultiMC/5.0 (Uncached)");
// Go ahead and try to open the file.
@ -107,7 +119,10 @@ void MD5EtagDownload::downloadFinished()
m_status = Job_Finished;
m_output_file.close();
// FIXME: compare with the real written data md5sum
// this is just an ETag
QLOG_INFO() << "Finished " << m_url.toString() << " got " << m_reply->rawHeader("ETag").constData();
m_reply.reset();
emit succeeded(m_index_within_job);
return;
@ -116,6 +131,7 @@ void MD5EtagDownload::downloadFinished()
else
{
m_output_file.close();
m_output_file.remove();
m_reply.reset();
emit failed(m_index_within_job);
return;

8
logic/net/MD5EtagDownload.h
View File

@ -23,12 +23,10 @@ class MD5EtagDownload : public NetAction
{
Q_OBJECT
public:
/// if true, check the md5sum against a provided md5sum
/// also, if a file exists, perform an md5sum first and don't download only if they don't
/// match
bool m_check_md5;
/// the expected md5 checksum
/// the expected md5 checksum. Only set from outside
QString m_expected_md5;
/// the md5 checksum of a file that already exists.
QString m_local_md5;
/// if saving to file, use the one specified in this string
QString m_target_path;
/// this is the output file, if any

5
logic/updater/DownloadUpdateTask.cpp
View File

@ -396,7 +396,6 @@ DownloadUpdateTask::processFileLists(NetJob *job,
// 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_check_md5 = true;
download->m_expected_md5 = entry.md5;
job->addNetAction(download);
}
@ -486,11 +485,15 @@ bool DownloadUpdateTask::writeInstallScript(UpdateOperationList &opsList, QStrin
}
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()
{