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0001 /*  This file is part of inqludeclient
0002  *  Copyright 2014  David Faure  <faure@kde.org>
0003  *
0004  *  This library is free software; you can redistribute it and/or modify
0005  *  it under the terms of the GNU Lesser General Public License as published by
0006  *  the Free Software Foundation; either version 2 of the License or ( at
0007  *  your option ) version 3 or, at the discretion of KDE e.V. ( which shall
0008  *  act as a proxy as in section 14 of the GPLv3 ), any later version.
0009  *
0010  *  This library is distributed in the hope that it will be useful,
0011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
0012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0013  *  Library General Public License for more details.
0014  *
0015  *  You should have received a copy of the GNU Lesser General Public License
0016  *  along with this library; see the file COPYING.LIB.  If not, write to
0017  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0018  *  Boston, MA 02110-1301, USA.
0019  */
0020 
0021 #include "httpdataprovider.h"
0022 #include <QFile>
0023 #include <QDir>
0024 #include <QJsonDocument>
0025 #include <QDebug>
0026 #include <QNetworkReply>
0027 #include <QNetworkAccessManager>
0028 
0029 #include <iostream>
0030 
0031 HttpDataProvider::HttpDataProvider(const QString &cacheFile)
0032     : m_qnam(new QNetworkAccessManager(this)),
0033       m_cacheFile(cacheFile)
0034 {
0035 }
0036 
0037 HttpDataProvider::~HttpDataProvider()
0038 {
0039 }
0040 
0041 void HttpDataProvider::ensureDataAvailable()
0042 {
0043     std::cerr << "Downloading library information, please wait..." << std::endl;
0044     QUrl url("https://inqlude.org/inqlude-all.json");
0045     QNetworkRequest request(url);
0046     request.setAttribute(QNetworkRequest::FollowRedirectsAttribute, true);
0047     QNetworkReply* reply = m_qnam->get(request);
0048     connect(m_qnam, &QNetworkAccessManager::finished, this, &HttpDataProvider::slotFinished);
0049 }
0050 
0051 void HttpDataProvider::slotFinished(QNetworkReply *reply)
0052 {
0053     const QByteArray data = reply->readAll(); // QJsonDocument can't read from a QIODevice !
0054     reply->deleteLater();
0055     if (data.isEmpty()) {
0056         qWarning() << "Empty document downloaded";
0057         emit error();
0058         return;
0059     }
0060     QJsonParseError jsonError;
0061     const QJsonDocument doc = QJsonDocument::fromJson(data, &jsonError);
0062     if (doc.isNull()) {
0063         qWarning() << "Error parsing JSON document:" << jsonError.errorString() << "at offset" << jsonError.offset;
0064         emit error();
0065         return;
0066     }
0067     // Write out cache
0068     QDir().mkpath(QFileInfo(m_cacheFile).absolutePath());
0069     QFile file(m_cacheFile);
0070     if (file.open(QIODevice::WriteOnly)) {
0071         file.write(data);
0072     }
0073     emit dataAvailable(doc);
0074 }