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Merge pull request #1556 from Trial97/metacache

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Gracefully handle invalid cache metadata
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TheKodeToad 2023-08-22 14:09:44 +01:00 committed by GitHub
commit 0e96111116
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1 changed files with 17 additions and 2 deletions
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19
launcher/net/HttpMetaCache.cpp
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@ -218,9 +218,24 @@ void HttpMetaCache::Load()
if (!index.open(QIODevice::ReadOnly))
return;
QJsonDocument json = QJsonDocument::fromJson(index.readAll());
QJsonParseError parseError;
QJsonDocument json = QJsonDocument::fromJson(index.readAll(), &parseError);
auto root = Json::requireObject(json, "HttpMetaCache root");
// Fail if the JSON is invalid.
if (parseError.error != QJsonParseError::NoError) {
qCritical() << QString("Failed to parse HttpMetaCache file: %1 at offset %2")
.arg(parseError.errorString(), QString::number(parseError.offset))
.toUtf8();
return;
}
// Make sure the root is an object.
if (!json.isObject()) {
qCritical() << "HttpMetaCache root should be an object.";
return;
}
auto root = json.object();
// check file version first
auto version_val = Json::ensureString(root, "version");