<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>metainfo.cpp Example File | Qt Network 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtnetwork-index.html">Qt Network</a></td><td ><a href="qtnetwork-torrent-example.html">Torrent Example</a></td><td >metainfo.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtnetwork-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">metainfo.cpp Example File</h1> <span class="subtitle">torrent/metainfo.cpp</span> <!-- $$$torrent/metainfo.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "bencodeparser.h"</span> <span class="preprocessor">#include "metainfo.h"</span> <span class="preprocessor">#include <QDateTime></span> <span class="preprocessor">#include <QMetaType></span> <span class="preprocessor">#include <QString></span> MetaInfo<span class="operator">::</span>MetaInfo() { clear(); } <span class="type">void</span> MetaInfo<span class="operator">::</span>clear() { errString <span class="operator">=</span> <span class="string">"Unknown error"</span>; content<span class="operator">.</span>clear(); infoData<span class="operator">.</span>clear(); metaInfoMultiFiles<span class="operator">.</span>clear(); metaInfoAnnounce<span class="operator">.</span>clear(); metaInfoAnnounceList<span class="operator">.</span>clear(); metaInfoCreationDate <span class="operator">=</span> <span class="type"><a href="../qtcore/qdatetime.html">QDateTime</a></span>(); metaInfoComment<span class="operator">.</span>clear(); metaInfoCreatedBy<span class="operator">.</span>clear(); metaInfoName<span class="operator">.</span>clear(); metaInfoPieceLength <span class="operator">=</span> <span class="number">0</span>; metaInfoSha1Sums<span class="operator">.</span>clear(); } bool MetaInfo<span class="operator">::</span>parse(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> <span class="operator">&</span>data) { clear(); content <span class="operator">=</span> data; BencodeParser parser; <span class="keyword">if</span> (<span class="operator">!</span>parser<span class="operator">.</span>parse(content)) { errString <span class="operator">=</span> parser<span class="operator">.</span>errorString(); <span class="keyword">return</span> <span class="keyword">false</span>; } infoData <span class="operator">=</span> parser<span class="operator">.</span>infoSection(); <span class="type"><a href="../qtcore/qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span><span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> dict <span class="operator">=</span> parser<span class="operator">.</span>dictionary(); <span class="keyword">if</span> (<span class="operator">!</span>dict<span class="operator">.</span>contains(<span class="string">"info"</span>)) <span class="keyword">return</span> <span class="keyword">false</span>; <span class="type"><a href="../qtcore/qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span><span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> info <span class="operator">=</span> qvariant_cast<span class="operator"><</span>Dictionary<span class="operator">></span>(dict<span class="operator">.</span>value(<span class="string">"info"</span>)); <span class="keyword">if</span> (info<span class="operator">.</span>contains(<span class="string">"files"</span>)) { metaInfoFileForm <span class="operator">=</span> MultiFileForm; <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> files <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"files"</span>)<span class="operator">.</span>toList(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> files<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { <span class="type"><a href="../qtcore/qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span><span class="operator">,</span> <span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> file <span class="operator">=</span> qvariant_cast<span class="operator"><</span>Dictionary<span class="operator">></span>(files<span class="operator">.</span>at(i)); <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span><span class="operator">></span> pathElements <span class="operator">=</span> file<span class="operator">.</span>value(<span class="string">"path"</span>)<span class="operator">.</span>toList(); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> path; foreach (<span class="type"><a href="../qtcore/qvariant.html">QVariant</a></span> p<span class="operator">,</span> pathElements) { <span class="keyword">if</span> (<span class="operator">!</span>path<span class="operator">.</span>isEmpty()) path <span class="operator">+</span><span class="operator">=</span> <span class="char">'/'</span>; path <span class="operator">+</span><span class="operator">=</span> p<span class="operator">.</span>toByteArray(); } MetaInfoMultiFile multiFile; multiFile<span class="operator">.</span>length <span class="operator">=</span> file<span class="operator">.</span>value(<span class="string">"length"</span>)<span class="operator">.</span>toLongLong(); multiFile<span class="operator">.</span>path <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(path); multiFile<span class="operator">.</span>md5sum <span class="operator">=</span> file<span class="operator">.</span>value(<span class="string">"md5sum"</span>)<span class="operator">.</span>toByteArray(); metaInfoMultiFiles <span class="operator"><</span><span class="operator"><</span> multiFile; } metaInfoName <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(info<span class="operator">.</span>value(<span class="string">"name"</span>)<span class="operator">.</span>toByteArray()); metaInfoPieceLength <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"piece length"</span>)<span class="operator">.</span>toInt(); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> pieces <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"pieces"</span>)<span class="operator">.</span>toByteArray(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> pieces<span class="operator">.</span>size(); i <span class="operator">+</span><span class="operator">=</span> <span class="number">20</span>) metaInfoSha1Sums <span class="operator"><</span><span class="operator"><</span> pieces<span class="operator">.</span>mid(i<span class="operator">,</span> <span class="number">20</span>); } <span class="keyword">else</span> <span class="keyword">if</span> (info<span class="operator">.</span>contains(<span class="string">"length"</span>)) { metaInfoFileForm <span class="operator">=</span> SingleFileForm; metaInfoSingleFile<span class="operator">.</span>length <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"length"</span>)<span class="operator">.</span>toLongLong(); metaInfoSingleFile<span class="operator">.</span>md5sum <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"md5sum"</span>)<span class="operator">.</span>toByteArray(); metaInfoSingleFile<span class="operator">.</span>name <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(info<span class="operator">.</span>value(<span class="string">"name"</span>)<span class="operator">.</span>toByteArray()); metaInfoSingleFile<span class="operator">.</span>pieceLength <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"piece length"</span>)<span class="operator">.</span>toInt(); <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> pieces <span class="operator">=</span> info<span class="operator">.</span>value(<span class="string">"pieces"</span>)<span class="operator">.</span>toByteArray(); <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> pieces<span class="operator">.</span>size(); i <span class="operator">+</span><span class="operator">=</span> <span class="number">20</span>) metaInfoSingleFile<span class="operator">.</span>sha1Sums <span class="operator"><</span><span class="operator"><</span> pieces<span class="operator">.</span>mid(i<span class="operator">,</span> <span class="number">20</span>); } metaInfoAnnounce <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(dict<span class="operator">.</span>value(<span class="string">"announce"</span>)<span class="operator">.</span>toByteArray()); <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"announce-list"</span>)) { <span class="comment">// ### unimplemented</span> } <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"creation date"</span>)) metaInfoCreationDate<span class="operator">.</span>setSecsSinceEpoch(dict<span class="operator">.</span>value(<span class="string">"creation date"</span>)<span class="operator">.</span>toInt()); <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"comment"</span>)) metaInfoComment <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(dict<span class="operator">.</span>value(<span class="string">"comment"</span>)<span class="operator">.</span>toByteArray()); <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"created by"</span>)) metaInfoCreatedBy <span class="operator">=</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(dict<span class="operator">.</span>value(<span class="string">"created by"</span>)<span class="operator">.</span>toByteArray()); <span class="keyword">return</span> <span class="keyword">true</span>; } <span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span> MetaInfo<span class="operator">::</span>infoValue() <span class="keyword">const</span> { <span class="keyword">return</span> infoData; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> MetaInfo<span class="operator">::</span>errorString() <span class="keyword">const</span> { <span class="keyword">return</span> errString; } MetaInfo<span class="operator">::</span>FileForm MetaInfo<span class="operator">::</span>fileForm() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoFileForm; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> MetaInfo<span class="operator">::</span>announceUrl() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoAnnounce; } <span class="type"><a href="../qtcore/qstringlist.html">QStringList</a></span> MetaInfo<span class="operator">::</span>announceList() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoAnnounceList; } <span class="type"><a href="../qtcore/qdatetime.html">QDateTime</a></span> MetaInfo<span class="operator">::</span>creationDate() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoCreationDate; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> MetaInfo<span class="operator">::</span>comment() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoComment; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> MetaInfo<span class="operator">::</span>createdBy() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoCreatedBy; } MetaInfoSingleFile MetaInfo<span class="operator">::</span>singleFile() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoSingleFile; } <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span>MetaInfoMultiFile<span class="operator">></span> MetaInfo<span class="operator">::</span>multiFiles() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoMultiFiles; } <span class="type"><a href="../qtcore/qstring.html">QString</a></span> MetaInfo<span class="operator">::</span>name() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoName; } <span class="type">int</span> MetaInfo<span class="operator">::</span>pieceLength() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoPieceLength; } <span class="type"><a href="../qtcore/qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="../qtcore/qbytearray.html">QByteArray</a></span><span class="operator">></span> MetaInfo<span class="operator">::</span>sha1Sums() <span class="keyword">const</span> { <span class="keyword">return</span> metaInfoSha1Sums; } <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> MetaInfo<span class="operator">::</span>totalSize() <span class="keyword">const</span> { <span class="keyword">if</span> (fileForm() <span class="operator">=</span><span class="operator">=</span> SingleFileForm) <span class="keyword">return</span> singleFile()<span class="operator">.</span>length; <span class="type"><a href="../qtcore/qtglobal.html#qint64-typedef">qint64</a></span> size <span class="operator">=</span> <span class="number">0</span>; foreach (MetaInfoMultiFile file<span class="operator">,</span> multiFiles()) size <span class="operator">+</span><span class="operator">=</span> file<span class="operator">.</span>length; <span class="keyword">return</span> size; } </pre> </div> <!-- @@@torrent/metainfo.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>