QTfrontend/ui/page/pagedata.cpp
author nemo
Mon, 30 Jan 2012 17:32:18 -0500
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2006-2011 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include <QGridLayout>
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#include <QPushButton>
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#include <QNetworkAccessManager>
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#include <QNetworkRequest>
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#include <QNetworkReply>
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#include <QFileInfo>
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#include <QFileDialog>
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#include <QDebug>
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#include <QProgressBar>
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#include <QBuffer>
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#include "pagedata.h"
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#include "databrowser.h"
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#include "hwconsts.h"
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#include "quazip.h"
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#include "quazipfile.h"
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QLayout * PageDataDownload::bodyLayoutDefinition()
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{
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    QGridLayout * pageLayout = new QGridLayout();
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    pageLayout->setColumnStretch(0, 1);
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    pageLayout->setColumnStretch(1, 1);
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    pageLayout->setColumnStretch(2, 1);
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    web = new DataBrowser(this);
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    pageLayout->addWidget(web, 0, 0, 1, 3);
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    progressBarsLayout = new QVBoxLayout();
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    pageLayout->addLayout(progressBarsLayout, 1, 0, 1, 3);
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    return pageLayout;
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}
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void PageDataDownload::connectSignals()
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{
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    connect(web, SIGNAL(anchorClicked(QUrl)), this, SLOT(request(const QUrl&)));
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}
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PageDataDownload::PageDataDownload(QWidget* parent) : AbstractPage(parent)
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{
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    initPage();
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    web->setOpenLinks(false);
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//    fetchList();
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}
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void PageDataDownload::request(const QUrl &url)
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{
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    QUrl finalUrl;
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    if(url.host().isEmpty())
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        finalUrl = QUrl("http://www.hedgewars.org" + url.path());
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    else
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        finalUrl = url;
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    if(url.path().endsWith(".zip"))
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    {
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        qWarning() << "Download Request" << url.toString();
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        QString fileName = QFileInfo(url.toString()).fileName();
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        QNetworkRequest newRequest(finalUrl);
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        newRequest.setAttribute(QNetworkRequest::User, fileName);
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        QNetworkAccessManager *manager = new QNetworkAccessManager(this);
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        QNetworkReply *reply = manager->get(newRequest);
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        connect(reply, SIGNAL(finished()), this, SLOT(fileDownloaded()));
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        connect(reply, SIGNAL(downloadProgress(qint64, qint64)), this, SLOT(downloadProgress(qint64, qint64)));
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        QProgressBar *progressBar = new QProgressBar(this);
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        progressBarsLayout->addWidget(progressBar);
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        progressBars.insert(reply, progressBar);
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    }
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    else
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    {
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        qWarning() << "Page Request" << url.toString();
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        QNetworkRequest newRequest(finalUrl);
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        QNetworkAccessManager *manager = new QNetworkAccessManager(this);
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        QNetworkReply *reply = manager->get(newRequest);
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        connect(reply, SIGNAL(finished()), this, SLOT(pageDownloaded()));
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    }
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}
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void PageDataDownload::pageDownloaded()
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{
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    QNetworkReply * reply = qobject_cast<QNetworkReply *>(sender());
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    if(reply)
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    {
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        QString html = QString::fromUtf8(reply->readAll());
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        int begin = html.indexOf("<!-- BEGIN -->");
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        int end = html.indexOf("<!-- END -->");
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        if(begin != -1 && begin < end)
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        {
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            html.truncate(end);
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            html.remove(0, begin);
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        }
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        web->setHtml(html);
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    }
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}
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void PageDataDownload::fileDownloaded()
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{
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    QNetworkReply * reply = qobject_cast<QNetworkReply *>(sender());
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    if(reply)
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    {
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        QByteArray fileContents = reply->readAll();
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        QProgressBar *progressBar = progressBars.value(reply, 0);
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        if(progressBar)
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        {
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            progressBars.remove(reply);
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            progressBar->deleteLater();
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        }
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        extractDataPack(&fileContents);
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    }
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}
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void PageDataDownload::downloadProgress(qint64 bytesRecieved, qint64 bytesTotal)
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{
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    QNetworkReply * reply = qobject_cast<QNetworkReply *>(sender());
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    if(reply)
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    {
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        QProgressBar *progressBar = progressBars.value(reply, 0);
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        if(progressBar)
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        {
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            progressBar->setValue(bytesRecieved);
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            progressBar->setMaximum(bytesTotal);
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        }
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    }
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}
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void PageDataDownload::fetchList()
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{
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    request(QUrl("http://hedgewars.org/content.html"));
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}
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bool PageDataDownload::extractDataPack(QByteArray * buf)
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{
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    QBuffer buffer;
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    buffer.setBuffer(buf);
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    QuaZip zip;
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    zip.setIoDevice(&buffer);
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    if(!zip.open(QuaZip::mdUnzip))
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    {
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        qWarning("testRead(): zip.open(): %d", zip.getZipError());
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        return false;
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    }
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    QuaZipFile file(&zip);
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    QDir extractDir(*cfgdir);
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    extractDir.cd("Data");
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    for(bool more = zip.goToFirstFile(); more; more = zip.goToNextFile())
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    {
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        if(!file.open(QIODevice::ReadOnly))
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        {
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            qWarning("file.open(): %d", file.getZipError());
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            return false;
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        }
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        QString fileName = file.getActualFileName();
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        QString filePath = extractDir.filePath(fileName);
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        if (fileName.endsWith("/"))
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        {
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            QFileInfo fi(filePath);
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            QDir().mkpath(fi.filePath());
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        }
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        else
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        {
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            qDebug() << "Extracting" << filePath;
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            QFile out(filePath);
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            if(!out.open(QFile::WriteOnly))
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            {
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                qWarning() << "out.open():" << out.errorString();
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                return false;
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            }
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            out.write(file.readAll());
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            out.close();
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            if(file.getZipError() != UNZ_OK)
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            {
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                qWarning("file.getFileName(): %d", file.getZipError());
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                return false;
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            }
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            if(!file.atEnd())
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            {
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                qWarning("read all but not EOF");
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                return false;
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            }
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        }
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        file.close();
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        if(file.getZipError()!=UNZ_OK)
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        {
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            qWarning("file.close(): %d", file.getZipError());
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            return false;
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        }
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    }
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    zip.close();
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    return true;
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}