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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">trackerclient.cpp Example File</h1> <span class="small-subtitle">network/torrent/trackerclient.cpp</span> <!-- $$$network/torrent/trackerclient.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 "connectionmanager.h"</span> <span class="preprocessor">#include "torrentclient.h"</span> <span class="preprocessor">#include "torrentserver.h"</span> <span class="preprocessor">#include "trackerclient.h"</span> <span class="preprocessor">#include <QtCore></span> TrackerClient<span class="operator">::</span>TrackerClient(TorrentClient <span class="operator">*</span>downloader<span class="operator">,</span> <span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qobject.html">QObject</a></span>(parent)<span class="operator">,</span> torrentDownloader(downloader) { length <span class="operator">=</span> <span class="number">0</span>; requestInterval <span class="operator">=</span> <span class="number">5</span> <span class="operator">*</span> <span class="number">60</span>; requestIntervalTimer <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; firstTrackerRequest <span class="operator">=</span> <span class="keyword">true</span>; lastTrackerRequest <span class="operator">=</span> <span class="keyword">false</span>; firstSeeding <span class="operator">=</span> <span class="keyword">true</span>; connect(<span class="operator">&</span>http<span class="operator">,</span> SIGNAL(done(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(httpRequestDone(<span class="type">bool</span>))); } <span class="type">void</span> TrackerClient<span class="operator">::</span>start(<span class="keyword">const</span> MetaInfo <span class="operator">&</span>info) { metaInfo <span class="operator">=</span> info; <span class="type"><a href="qtimer.html">QTimer</a></span><span class="operator">::</span>singleShot(<span class="number">0</span><span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(fetchPeerList())); <span class="keyword">if</span> (metaInfo<span class="operator">.</span>fileForm() <span class="operator">=</span><span class="operator">=</span> MetaInfo<span class="operator">::</span>SingleFileForm) { length <span class="operator">=</span> metaInfo<span class="operator">.</span>singleFile()<span class="operator">.</span>length; } <span class="keyword">else</span> { <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>MetaInfoMultiFile<span class="operator">></span> files <span class="operator">=</span> metaInfo<span class="operator">.</span>multiFiles(); <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) length <span class="operator">+</span><span class="operator">=</span> files<span class="operator">.</span>at(i)<span class="operator">.</span>length; } } <span class="type">void</span> TrackerClient<span class="operator">::</span>startSeeding() { firstSeeding <span class="operator">=</span> <span class="keyword">true</span>; fetchPeerList(); } <span class="type">void</span> TrackerClient<span class="operator">::</span>stop() { lastTrackerRequest <span class="operator">=</span> <span class="keyword">true</span>; http<span class="operator">.</span>abort(); fetchPeerList(); } <span class="type">void</span> TrackerClient<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>event) { <span class="keyword">if</span> (event<span class="operator">-</span><span class="operator">></span>timerId() <span class="operator">=</span><span class="operator">=</span> requestIntervalTimer) { <span class="keyword">if</span> (http<span class="operator">.</span>state() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qhttp.html">QHttp</a></span><span class="operator">::</span>Unconnected) fetchPeerList(); } <span class="keyword">else</span> { <span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>timerEvent(event); } } <span class="type">void</span> TrackerClient<span class="operator">::</span>fetchPeerList() { <span class="comment">// Prepare connection details</span> <span class="type"><a href="qstring.html">QString</a></span> fullUrl <span class="operator">=</span> metaInfo<span class="operator">.</span>announceUrl(); <span class="type"><a href="qurl.html">QUrl</a></span> url(fullUrl); <span class="type"><a href="qstring.html">QString</a></span> passkey <span class="operator">=</span> <span class="string">"?"</span>; <span class="keyword">if</span> (fullUrl<span class="operator">.</span>contains(<span class="string">"?passkey"</span>)) { passkey <span class="operator">=</span> metaInfo<span class="operator">.</span>announceUrl()<span class="operator">.</span>mid(fullUrl<span class="operator">.</span>indexOf(<span class="string">"?passkey"</span>)<span class="operator">,</span> <span class="operator">-</span><span class="number">1</span>); passkey <span class="operator">+</span><span class="operator">=</span> <span class="char">'&'</span>; } <span class="comment">// Percent encode the hash</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> infoHash <span class="operator">=</span> torrentDownloader<span class="operator">-</span><span class="operator">></span>infoHash(); <span class="type"><a href="qstring.html">QString</a></span> encodedSum; <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> infoHash<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { encodedSum <span class="operator">+</span><span class="operator">=</span> <span class="char">'%'</span>; encodedSum <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>number(infoHash<span class="operator">[</span>i<span class="operator">]</span><span class="operator">,</span> <span class="number">16</span>)<span class="operator">.</span>right(<span class="number">2</span>)<span class="operator">.</span>rightJustified(<span class="number">2</span><span class="operator">,</span> <span class="char">'0'</span>); } <span class="type">bool</span> seeding <span class="operator">=</span> (torrentDownloader<span class="operator">-</span><span class="operator">></span>state() <span class="operator">=</span><span class="operator">=</span> TorrentClient<span class="operator">::</span>Seeding); <span class="type"><a href="qbytearray.html">QByteArray</a></span> query; query <span class="operator">+</span><span class="operator">=</span> url<span class="operator">.</span>path()<span class="operator">.</span>toLatin1(); query <span class="operator">+</span><span class="operator">=</span> passkey; query <span class="operator">+</span><span class="operator">=</span> <span class="string">"info_hash="</span> <span class="operator">+</span> encodedSum; query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&peer_id="</span> <span class="operator">+</span> ConnectionManager<span class="operator">::</span>instance()<span class="operator">-</span><span class="operator">></span>clientId(); query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&port="</span> <span class="operator">+</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(TorrentServer<span class="operator">::</span>instance()<span class="operator">-</span><span class="operator">></span>serverPort()); query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&compact=1"</span>; query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&uploaded="</span> <span class="operator">+</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(torrentDownloader<span class="operator">-</span><span class="operator">></span>uploadedBytes()); <span class="keyword">if</span> (<span class="operator">!</span>firstSeeding) { query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&downloaded=0"</span>; query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&left=0"</span>; } <span class="keyword">else</span> { query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&downloaded="</span> <span class="operator">+</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number( torrentDownloader<span class="operator">-</span><span class="operator">></span>downloadedBytes()); <span class="type">int</span> left <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a><span class="operator"><</span><span class="type">int</span><span class="operator">></span>(<span class="number">0</span><span class="operator">,</span> metaInfo<span class="operator">.</span>totalSize() <span class="operator">-</span> torrentDownloader<span class="operator">-</span><span class="operator">></span>downloadedBytes()); query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&left="</span> <span class="operator">+</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">::</span>number(seeding <span class="operator">?</span> <span class="number">0</span> : left); } <span class="keyword">if</span> (seeding <span class="operator">&</span><span class="operator">&</span> firstSeeding) { query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&event=completed"</span>; firstSeeding <span class="operator">=</span> <span class="keyword">false</span>; } <span class="keyword">else</span> <span class="keyword">if</span> (firstTrackerRequest) { firstTrackerRequest <span class="operator">=</span> <span class="keyword">false</span>; query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&event=started"</span>; } <span class="keyword">else</span> <span class="keyword">if</span>(lastTrackerRequest) { query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&event=stopped"</span>; } <span class="keyword">if</span> (<span class="operator">!</span>trackerId<span class="operator">.</span>isEmpty()) query <span class="operator">+</span><span class="operator">=</span> <span class="string">"&trackerid="</span> <span class="operator">+</span> trackerId; http<span class="operator">.</span>setHost(url<span class="operator">.</span>host()<span class="operator">,</span> url<span class="operator">.</span>port() <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span> <span class="operator">?</span> <span class="number">80</span> : url<span class="operator">.</span>port()); <span class="keyword">if</span> (<span class="operator">!</span>url<span class="operator">.</span>userName()<span class="operator">.</span>isEmpty()) http<span class="operator">.</span>setUser(url<span class="operator">.</span>userName()<span class="operator">,</span> url<span class="operator">.</span>password()); http<span class="operator">.</span>get(query); } <span class="type">void</span> TrackerClient<span class="operator">::</span>httpRequestDone(<span class="type">bool</span> error) { <span class="keyword">if</span> (lastTrackerRequest) { <span class="keyword">emit</span> stopped(); <span class="keyword">return</span>; } <span class="keyword">if</span> (error) { <span class="keyword">emit</span> connectionError(http<span class="operator">.</span>error()); <span class="keyword">return</span>; } <span class="type"><a href="qbytearray.html">QByteArray</a></span> response <span class="operator">=</span> http<span class="operator">.</span>readAll(); http<span class="operator">.</span>abort(); BencodeParser parser; <span class="keyword">if</span> (<span class="operator">!</span>parser<span class="operator">.</span>parse(response)) { <a href="qtglobal.html#qWarning">qWarning</a>(<span class="string">"Error parsing bencode response from tracker: %s"</span><span class="operator">,</span> <a href="qtglobal.html#qPrintable">qPrintable</a>(parser<span class="operator">.</span>errorString())); http<span class="operator">.</span>abort(); <span class="keyword">return</span>; } <span class="type"><a href="qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">,</span> <span class="type"><a href="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> (dict<span class="operator">.</span>contains(<span class="string">"failure reason"</span>)) { <span class="comment">// no other items are present</span> <span class="keyword">emit</span> failure(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(dict<span class="operator">.</span>value(<span class="string">"failure reason"</span>)<span class="operator">.</span>toByteArray())); <span class="keyword">return</span>; } <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"warning message"</span>)) { <span class="comment">// continue processing</span> <span class="keyword">emit</span> warning(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(dict<span class="operator">.</span>value(<span class="string">"warning message"</span>)<span class="operator">.</span>toByteArray())); } <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"tracker id"</span>)) { <span class="comment">// store it</span> trackerId <span class="operator">=</span> dict<span class="operator">.</span>value(<span class="string">"tracker id"</span>)<span class="operator">.</span>toByteArray(); } <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"interval"</span>)) { <span class="comment">// Mandatory item</span> <span class="keyword">if</span> (requestIntervalTimer <span class="operator">!</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>) killTimer(requestIntervalTimer); requestIntervalTimer <span class="operator">=</span> startTimer(dict<span class="operator">.</span>value(<span class="string">"interval"</span>)<span class="operator">.</span>toInt() <span class="operator">*</span> <span class="number">1000</span>); } <span class="keyword">if</span> (dict<span class="operator">.</span>contains(<span class="string">"peers"</span>)) { <span class="comment">// store it</span> peers<span class="operator">.</span>clear(); <span class="type"><a href="qvariant.html">QVariant</a></span> peerEntry <span class="operator">=</span> dict<span class="operator">.</span>value(<span class="string">"peers"</span>); <span class="keyword">if</span> (peerEntry<span class="operator">.</span>type() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>List) { <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">></span> peerTmp <span class="operator">=</span> peerEntry<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> peerTmp<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) { TorrentPeer tmp; <span class="type"><a href="qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">></span> peer <span class="operator">=</span> qvariant_cast<span class="operator"><</span><span class="type"><a href="qmap.html">QMap</a></span><span class="operator"><</span><span class="type"><a href="qbytearray.html">QByteArray</a></span><span class="operator">,</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">></span> <span class="operator">></span>(peerTmp<span class="operator">.</span>at(i)); tmp<span class="operator">.</span>id <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(peer<span class="operator">.</span>value(<span class="string">"peer id"</span>)<span class="operator">.</span>toByteArray()); tmp<span class="operator">.</span>address<span class="operator">.</span>setAddress(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>fromUtf8(peer<span class="operator">.</span>value(<span class="string">"ip"</span>)<span class="operator">.</span>toByteArray())); tmp<span class="operator">.</span>port <span class="operator">=</span> peer<span class="operator">.</span>value(<span class="string">"port"</span>)<span class="operator">.</span>toInt(); peers <span class="operator"><</span><span class="operator"><</span> tmp; } } <span class="keyword">else</span> { <span class="type"><a href="qbytearray.html">QByteArray</a></span> peerTmp <span class="operator">=</span> peerEntry<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> peerTmp<span class="operator">.</span>size(); i <span class="operator">+</span><span class="operator">=</span> <span class="number">6</span>) { TorrentPeer tmp; <span class="type"><a href="qtglobal.html#uchar-typedef">uchar</a></span> <span class="operator">*</span>data <span class="operator">=</span> (<span class="type"><a href="qtglobal.html#uchar-typedef">uchar</a></span> <span class="operator">*</span>)peerTmp<span class="operator">.</span>constData() <span class="operator">+</span> i; tmp<span class="operator">.</span>port <span class="operator">=</span> (<span class="type">int</span>(data<span class="operator">[</span><span class="number">4</span><span class="operator">]</span>) <span class="operator"><</span><span class="operator"><</span> <span class="number">8</span>) <span class="operator">+</span> data<span class="operator">[</span><span class="number">5</span><span class="operator">]</span>; <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> ipAddress <span class="operator">=</span> <span class="number">0</span>; ipAddress <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span>(data<span class="operator">[</span><span class="number">0</span><span class="operator">]</span>) <span class="operator"><</span><span class="operator"><</span> <span class="number">24</span>; ipAddress <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span>(data<span class="operator">[</span><span class="number">1</span><span class="operator">]</span>) <span class="operator"><</span><span class="operator"><</span> <span class="number">16</span>; ipAddress <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span>(data<span class="operator">[</span><span class="number">2</span><span class="operator">]</span>) <span class="operator"><</span><span class="operator"><</span> <span class="number">8</span>; ipAddress <span class="operator">+</span><span class="operator">=</span> <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span>(data<span class="operator">[</span><span class="number">3</span><span class="operator">]</span>); tmp<span class="operator">.</span>address<span class="operator">.</span>setAddress(ipAddress); peers <span class="operator"><</span><span class="operator"><</span> tmp; } } <span class="keyword">emit</span> peerListUpdated(peers); } }</pre> </div> <!-- @@@network/torrent/trackerclient.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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