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/*
SPDX-FileCopyrightText: 2016 Volker Krause <vkrause@kde.org>
SPDX-License-Identifier: MIT
*/
#include "definitiondownloader.h"
#include "definition.h"
#include "ksyntaxhighlighting_logging.h"
#include "ksyntaxhighlighting_version.h"
#include "repository.h"
#include <QDir>
#include <QFile>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QStandardPaths>
#include <QTimer>
#include <QXmlStreamReader>
using namespace KSyntaxHighlighting;
class KSyntaxHighlighting::DefinitionDownloaderPrivate
{
public:
DefinitionDownloader *q;
Repository *repo;
QNetworkAccessManager *nam;
QString downloadLocation;
int pendingDownloads;
bool needsReload;
void definitionListDownloadFinished(QNetworkReply *reply);
void updateDefinition(QXmlStreamReader &parser);
void downloadDefinition(const QUrl &url);
void downloadDefinitionFinished(QNetworkReply *reply);
void checkDone();
};
void DefinitionDownloaderPrivate::definitionListDownloadFinished(QNetworkReply *reply)
{
const auto networkError = reply->error();
if (networkError != QNetworkReply::NoError) {
qCWarning(Log) << networkError;
emit q->done(); // TODO return error
return;
}
QXmlStreamReader parser(reply);
while (!parser.atEnd()) {
switch (parser.readNext()) {
case QXmlStreamReader::StartElement:
if (parser.name() == QLatin1String("Definition"))
updateDefinition(parser);
break;
default:
break;
}
}
if (pendingDownloads == 0)
emit q->informationMessage(QObject::tr("All syntax definitions are up-to-date."));
checkDone();
}
void DefinitionDownloaderPrivate::updateDefinition(QXmlStreamReader &parser)
{
const auto name = parser.attributes().value(QLatin1String("name"));
if (name.isEmpty())
return;
auto localDef = repo->definitionForName(name.toString());
if (!localDef.isValid()) {
emit q->informationMessage(QObject::tr("Downloading new syntax definition for '%1'...").arg(name.toString()));
downloadDefinition(QUrl(parser.attributes().value(QLatin1String("url")).toString()));
return;
}
const auto version = parser.attributes().value(QLatin1String("version"));
if (localDef.version() < version.toFloat()) {
emit q->informationMessage(QObject::tr("Updating syntax definition for '%1' to version %2...").arg(name.toString(), version.toString()));
downloadDefinition(QUrl(parser.attributes().value(QLatin1String("url")).toString()));
}
}
void DefinitionDownloaderPrivate::downloadDefinition(const QUrl &downloadUrl)
{
if (!downloadUrl.isValid())
return;
auto url = downloadUrl;
if (url.scheme() == QLatin1String("http"))
url.setScheme(QStringLiteral("https"));
QNetworkRequest req(url);
auto reply = nam->get(req);
QObject::connect(reply, &QNetworkReply::finished, q, [this, reply]() { downloadDefinitionFinished(reply); });
++pendingDownloads;
needsReload = true;
}
void DefinitionDownloaderPrivate::downloadDefinitionFinished(QNetworkReply *reply)
{
--pendingDownloads;
const auto networkError = reply->error();
if (networkError != QNetworkReply::NoError) {
qCWarning(Log) << "Failed to download definition file" << reply->url() << networkError;
checkDone();
return;
}
// handle redirects
// needs to be done manually, download server redirects to unsafe http links
const auto redirectUrl = reply->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl();
if (!redirectUrl.isEmpty()) {
downloadDefinition(reply->url().resolved(redirectUrl));
checkDone();
return;
}
QFile file(downloadLocation + QLatin1Char('/') + reply->url().fileName());
if (!file.open(QFile::WriteOnly)) {
qCWarning(Log) << "Failed to open" << file.fileName() << file.error();
} else {
file.write(reply->readAll());
}
checkDone();
}
void DefinitionDownloaderPrivate::checkDone()
{
if (pendingDownloads == 0) {
if (needsReload)
repo->reload();
emit QTimer::singleShot(0, q, &DefinitionDownloader::done);
}
}
DefinitionDownloader::DefinitionDownloader(Repository *repo, QObject *parent)
: QObject(parent)
, d(new DefinitionDownloaderPrivate())
{
Q_ASSERT(repo);
d->q = this;
d->repo = repo;
d->nam = new QNetworkAccessManager(this);
d->pendingDownloads = 0;
d->needsReload = false;
d->downloadLocation = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + QStringLiteral("/org.kde.syntax-highlighting/syntax");
QDir().mkpath(d->downloadLocation);
Q_ASSERT(QFile::exists(d->downloadLocation));
}
DefinitionDownloader::~DefinitionDownloader()
{
}
void DefinitionDownloader::start()
{
const QString url = QLatin1String("https://www.kate-editor.org/syntax/update-") + QString::number(SyntaxHighlighting_VERSION_MAJOR) + QLatin1Char('.') + QString::number(SyntaxHighlighting_VERSION_MINOR) + QLatin1String(".xml");
auto req = QNetworkRequest(QUrl(url));
req.setAttribute(QNetworkRequest::RedirectPolicyAttribute,
QNetworkRequest::NoLessSafeRedirectPolicy);
auto reply = d->nam->get(req);
QObject::connect(reply, &QNetworkReply::finished, this, [=]() { d->definitionListDownloadFinished(reply); });
}
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