////  Downloader.cpp////  Created by Nissim Hadar on 1 Mar 2018.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//#include "Downloader.h"#include "PythonInterface.h" #include <QFile>#include <QMessageBox>#include <QProcess>#include <QThread>#include <QTextStream> Downloader::Downloader() {    PythonInterface* pythonInterface = new PythonInterface();    _pythonCommand = pythonInterface->getPythonCommand();} void Downloader::downloadFiles(const QStringList& URLs, const QString& directoryName, const QStringList& filenames, void *caller) {    if (URLs.size() <= 0) {        return;    }     QString filename = directoryName + "/downloadFiles.py";    if (QFile::exists(filename)) {        QFile::remove(filename);    }    QFile file(filename);     if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {        QMessageBox::critical(0, "Internal error: " + QString(__FILE__) + ":" + QString::number(__LINE__),            "Could not create 'downloadFiles.py'");        exit(-1);    }     QTextStream stream(&file);     stream << "import requests\n";     for (int i = 0; i < URLs.size(); ++i) {        stream << "\nurl = '" + URLs[i] + "'\n";        stream << "r = requests.get(url)\n";        stream << "open('" + directoryName + '/' + filenames [i] + "', 'wb').write(r.content)\n";    }     file.close(); #ifdef Q_OS_WIN    QProcess* process = new QProcess();    _busyWindow.setWindowTitle("Downloading Files");    connect(process, &QProcess::started, this, [=]() { _busyWindow.exec(); });    connect(process, SIGNAL(finished(int)), process, SLOT(deleteLater()));    connect(process, static_cast<void (QProcess::*)(int, QProcess::ExitStatus)>(&QProcess::finished), this,            [=](int exitCode, QProcess::ExitStatus exitStatus) { _busyWindow.hide(); });     QStringList parameters = QStringList() << filename;    process->start(_pythonCommand, parameters);#elif defined Q_OS_MAC    QProcess* process = new QProcess();    QStringList parameters = QStringList() << "-c" << _pythonCommand + " " + filename;    process->start("sh", parameters);        // Wait for the last file to download    while (!QFile::exists(directoryName + '/' + filenames[filenames.length() - 1])) {        QThread::msleep(200);    }#endif}