649 lines
48 KiB
HTML
649 lines
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<h1 class="title">filemanager.cpp Example File</h1>
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<span class="small-subtitle">network/torrent/filemanager.cpp</span>
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<!-- $$$network/torrent/filemanager.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include "filemanager.h"</span>
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<span class="preprocessor">#include "metainfo.h"</span>
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<span class="preprocessor">#include <QByteArray></span>
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<span class="preprocessor">#include <QDir></span>
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<span class="preprocessor">#include <QFile></span>
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<span class="preprocessor">#include <QTimer></span>
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<span class="preprocessor">#include <QTimerEvent></span>
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<span class="preprocessor">#include <QCryptographicHash></span>
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FileManager<span class="operator">::</span>FileManager(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent)
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: <span class="type"><a href="qthread.html">QThread</a></span>(parent)
|
|
{
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|
quit <span class="operator">=</span> <span class="keyword">false</span>;
|
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totalLength <span class="operator">=</span> <span class="number">0</span>;
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readId <span class="operator">=</span> <span class="number">0</span>;
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startVerification <span class="operator">=</span> <span class="keyword">false</span>;
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wokeUp <span class="operator">=</span> <span class="keyword">false</span>;
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newFile <span class="operator">=</span> <span class="keyword">false</span>;
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numPieces <span class="operator">=</span> <span class="number">0</span>;
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verifiedPieces<span class="operator">.</span>fill(<span class="keyword">false</span>);
|
|
}
|
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|
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FileManager<span class="operator">::</span><span class="operator">~</span>FileManager()
|
|
{
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quit <span class="operator">=</span> <span class="keyword">true</span>;
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|
<span class="type">cond</span><span class="operator">.</span>wakeOne();
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wait();
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|
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foreach (<span class="type"><a href="qfile.html">QFile</a></span> <span class="operator">*</span>file<span class="operator">,</span> files) {
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file<span class="operator">-</span><span class="operator">></span>close();
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<span class="keyword">delete</span> file;
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|
}
|
|
}
|
|
|
|
<span class="type">int</span> FileManager<span class="operator">::</span>read(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="type">int</span> length)
|
|
{
|
|
ReadRequest request;
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|
request<span class="operator">.</span>pieceIndex <span class="operator">=</span> pieceIndex;
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|
request<span class="operator">.</span>offset <span class="operator">=</span> offset;
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|
request<span class="operator">.</span>length <span class="operator">=</span> length;
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|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
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request<span class="operator">.</span>id <span class="operator">=</span> readId<span class="operator">+</span><span class="operator">+</span>;
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readRequests <span class="operator"><</span><span class="operator"><</span> request;
|
|
|
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<span class="keyword">if</span> (<span class="operator">!</span>wokeUp) {
|
|
wokeUp <span class="operator">=</span> <span class="keyword">true</span>;
|
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<span class="type"><a href="qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>invokeMethod(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"wakeUp"</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection);
|
|
}
|
|
|
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<span class="keyword">return</span> request<span class="operator">.</span>id;
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|
}
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|
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<span class="type">void</span> FileManager<span class="operator">::</span>write(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> <span class="operator">&</span>data)
|
|
{
|
|
WriteRequest request;
|
|
request<span class="operator">.</span>pieceIndex <span class="operator">=</span> pieceIndex;
|
|
request<span class="operator">.</span>offset <span class="operator">=</span> offset;
|
|
request<span class="operator">.</span>data <span class="operator">=</span> data;
|
|
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
writeRequests <span class="operator"><</span><span class="operator"><</span> request;
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>wokeUp) {
|
|
wokeUp <span class="operator">=</span> <span class="keyword">true</span>;
|
|
<span class="type"><a href="qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>invokeMethod(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"wakeUp"</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection);
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> FileManager<span class="operator">::</span>verifyPiece(<span class="type">int</span> pieceIndex)
|
|
{
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
pendingVerificationRequests <span class="operator"><</span><span class="operator"><</span> pieceIndex;
|
|
startVerification <span class="operator">=</span> <span class="keyword">true</span>;
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>wokeUp) {
|
|
wokeUp <span class="operator">=</span> <span class="keyword">true</span>;
|
|
<span class="type"><a href="qmetaobject.html">QMetaObject</a></span><span class="operator">::</span>invokeMethod(<span class="keyword">this</span><span class="operator">,</span> <span class="string">"wakeUp"</span><span class="operator">,</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>QueuedConnection);
|
|
}
|
|
}
|
|
|
|
<span class="type">int</span> FileManager<span class="operator">::</span>pieceLengthAt(<span class="type">int</span> pieceIndex) <span class="keyword">const</span>
|
|
{
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
<span class="keyword">return</span> (sha1s<span class="operator">.</span>size() <span class="operator">=</span><span class="operator">=</span> pieceIndex <span class="operator">+</span> <span class="number">1</span>)
|
|
<span class="operator">?</span> (totalLength <span class="operator">%</span> pieceLength) : pieceLength;
|
|
}
|
|
|
|
<span class="type"><a href="qbitarray.html">QBitArray</a></span> FileManager<span class="operator">::</span>completedPieces() <span class="keyword">const</span>
|
|
{
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
<span class="keyword">return</span> verifiedPieces;
|
|
}
|
|
|
|
<span class="type">void</span> FileManager<span class="operator">::</span>setCompletedPieces(<span class="keyword">const</span> <span class="type"><a href="qbitarray.html">QBitArray</a></span> <span class="operator">&</span>pieces)
|
|
{
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
verifiedPieces <span class="operator">=</span> pieces;
|
|
}
|
|
|
|
<span class="type"><a href="qstring.html">QString</a></span> FileManager<span class="operator">::</span>errorString() <span class="keyword">const</span>
|
|
{
|
|
<span class="keyword">return</span> errString;
|
|
}
|
|
|
|
<span class="type">void</span> FileManager<span class="operator">::</span>run()
|
|
{
|
|
<span class="keyword">if</span> (<span class="operator">!</span>generateFiles())
|
|
<span class="keyword">return</span>;
|
|
|
|
<span class="keyword">do</span> {
|
|
{
|
|
<span class="comment">// Go to sleep if there's nothing to do.</span>
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
<span class="keyword">if</span> (<span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> readRequests<span class="operator">.</span>isEmpty() <span class="operator">&</span><span class="operator">&</span> writeRequests<span class="operator">.</span>isEmpty() <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>startVerification)
|
|
<span class="type">cond</span><span class="operator">.</span>wait(<span class="operator">&</span>mutex);
|
|
}
|
|
|
|
<span class="comment">// Read pending read requests</span>
|
|
mutex<span class="operator">.</span>lock();
|
|
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>ReadRequest<span class="operator">></span> newReadRequests <span class="operator">=</span> readRequests;
|
|
readRequests<span class="operator">.</span>clear();
|
|
mutex<span class="operator">.</span>unlock();
|
|
<span class="keyword">while</span> (<span class="operator">!</span>newReadRequests<span class="operator">.</span>isEmpty()) {
|
|
ReadRequest request <span class="operator">=</span> newReadRequests<span class="operator">.</span>takeFirst();
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> block <span class="operator">=</span> readBlock(request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> request<span class="operator">.</span>length);
|
|
<span class="keyword">emit</span> dataRead(request<span class="operator">.</span>id<span class="operator">,</span> request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> block);
|
|
}
|
|
|
|
<span class="comment">// Write pending write requests</span>
|
|
mutex<span class="operator">.</span>lock();
|
|
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>WriteRequest<span class="operator">></span> newWriteRequests <span class="operator">=</span> writeRequests;
|
|
writeRequests<span class="operator">.</span>clear();
|
|
<span class="keyword">while</span> (<span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>newWriteRequests<span class="operator">.</span>isEmpty()) {
|
|
WriteRequest request <span class="operator">=</span> newWriteRequests<span class="operator">.</span>takeFirst();
|
|
writeBlock(request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> request<span class="operator">.</span>data);
|
|
}
|
|
|
|
<span class="comment">// Process pending verification requests</span>
|
|
<span class="keyword">if</span> (startVerification) {
|
|
newPendingVerificationRequests <span class="operator">=</span> pendingVerificationRequests;
|
|
pendingVerificationRequests<span class="operator">.</span>clear();
|
|
verifyFileContents();
|
|
startVerification <span class="operator">=</span> <span class="keyword">false</span>;
|
|
}
|
|
mutex<span class="operator">.</span>unlock();
|
|
newPendingVerificationRequests<span class="operator">.</span>clear();
|
|
|
|
} <span class="keyword">while</span> (<span class="operator">!</span>quit);
|
|
|
|
<span class="comment">// Write pending write requests</span>
|
|
mutex<span class="operator">.</span>lock();
|
|
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span>WriteRequest<span class="operator">></span> newWriteRequests <span class="operator">=</span> writeRequests;
|
|
writeRequests<span class="operator">.</span>clear();
|
|
mutex<span class="operator">.</span>unlock();
|
|
<span class="keyword">while</span> (<span class="operator">!</span>newWriteRequests<span class="operator">.</span>isEmpty()) {
|
|
WriteRequest request <span class="operator">=</span> newWriteRequests<span class="operator">.</span>takeFirst();
|
|
writeBlock(request<span class="operator">.</span>pieceIndex<span class="operator">,</span> request<span class="operator">.</span>offset<span class="operator">,</span> request<span class="operator">.</span>data);
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> FileManager<span class="operator">::</span>startDataVerification()
|
|
{
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
startVerification <span class="operator">=</span> <span class="keyword">true</span>;
|
|
<span class="type">cond</span><span class="operator">.</span>wakeOne();
|
|
}
|
|
|
|
<span class="type">bool</span> FileManager<span class="operator">::</span>generateFiles()
|
|
{
|
|
numPieces <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
|
|
|
|
<span class="comment">// Set up the thread local data</span>
|
|
<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) {
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
MetaInfoSingleFile singleFile <span class="operator">=</span> metaInfo<span class="operator">.</span>singleFile();
|
|
|
|
<span class="type"><a href="qstring.html">QString</a></span> prefix;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>destinationPath<span class="operator">.</span>isEmpty()) {
|
|
prefix <span class="operator">=</span> destinationPath;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>prefix<span class="operator">.</span>endsWith(<span class="string">"/"</span>))
|
|
prefix <span class="operator">+</span><span class="operator">=</span> <span class="string">"/"</span>;
|
|
<span class="type"><a href="qdir.html">QDir</a></span> dir;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>dir<span class="operator">.</span>mkpath(prefix)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to create directory %1"</span>)<span class="operator">.</span>arg(prefix);
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
}
|
|
<span class="type"><a href="qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qfile.html">QFile</a></span>(prefix <span class="operator">+</span> singleFile<span class="operator">.</span>name);
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to open/create file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
<span class="keyword">if</span> (file<span class="operator">-</span><span class="operator">></span>size() <span class="operator">!</span><span class="operator">=</span> singleFile<span class="operator">.</span>length) {
|
|
newFile <span class="operator">=</span> <span class="keyword">true</span>;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>resize(singleFile<span class="operator">.</span>length)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to resize file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
}
|
|
fileSizes <span class="operator"><</span><span class="operator"><</span> file<span class="operator">-</span><span class="operator">></span>size();
|
|
files <span class="operator"><</span><span class="operator"><</span> file;
|
|
file<span class="operator">-</span><span class="operator">></span>close();
|
|
|
|
pieceLength <span class="operator">=</span> singleFile<span class="operator">.</span>pieceLength;
|
|
totalLength <span class="operator">=</span> singleFile<span class="operator">.</span>length;
|
|
sha1s <span class="operator">=</span> singleFile<span class="operator">.</span>sha1Sums;
|
|
} <span class="keyword">else</span> {
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
<span class="type"><a href="qdir.html">QDir</a></span> dir;
|
|
<span class="type"><a href="qstring.html">QString</a></span> prefix;
|
|
|
|
<span class="keyword">if</span> (<span class="operator">!</span>destinationPath<span class="operator">.</span>isEmpty()) {
|
|
prefix <span class="operator">=</span> destinationPath;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>prefix<span class="operator">.</span>endsWith(<span class="string">"/"</span>))
|
|
prefix <span class="operator">+</span><span class="operator">=</span> <span class="string">"/"</span>;
|
|
}
|
|
<span class="keyword">if</span> (<span class="operator">!</span>metaInfo<span class="operator">.</span>name()<span class="operator">.</span>isEmpty()) {
|
|
prefix <span class="operator">+</span><span class="operator">=</span> metaInfo<span class="operator">.</span>name();
|
|
<span class="keyword">if</span> (<span class="operator">!</span>prefix<span class="operator">.</span>endsWith(<span class="string">"/"</span>))
|
|
prefix <span class="operator">+</span><span class="operator">=</span> <span class="string">"/"</span>;
|
|
}
|
|
<span class="keyword">if</span> (<span class="operator">!</span>dir<span class="operator">.</span>mkpath(prefix)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to create directory %1"</span>)<span class="operator">.</span>arg(prefix);
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
foreach (<span class="keyword">const</span> MetaInfoMultiFile <span class="operator">&</span>entry<span class="operator">,</span> metaInfo<span class="operator">.</span>multiFiles()) {
|
|
<span class="type"><a href="qstring.html">QString</a></span> filePath <span class="operator">=</span> <span class="type"><a href="qfileinfo.html">QFileInfo</a></span>(prefix <span class="operator">+</span> entry<span class="operator">.</span>path)<span class="operator">.</span>path();
|
|
<span class="keyword">if</span> (<span class="operator">!</span><span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>exists(filePath)) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>dir<span class="operator">.</span>mkpath(filePath)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to create directory %1"</span>)<span class="operator">.</span>arg(filePath);
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
}
|
|
|
|
<span class="type"><a href="qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qfile.html">QFile</a></span>(prefix <span class="operator">+</span> entry<span class="operator">.</span>path);
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to open/create file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
<span class="keyword">if</span> (file<span class="operator">-</span><span class="operator">></span>size() <span class="operator">!</span><span class="operator">=</span> entry<span class="operator">.</span>length) {
|
|
newFile <span class="operator">=</span> <span class="keyword">true</span>;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>resize(entry<span class="operator">.</span>length)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to resize file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
}
|
|
fileSizes <span class="operator"><</span><span class="operator"><</span> file<span class="operator">-</span><span class="operator">></span>size();
|
|
files <span class="operator"><</span><span class="operator"><</span> file;
|
|
file<span class="operator">-</span><span class="operator">></span>close();
|
|
|
|
totalLength <span class="operator">+</span><span class="operator">=</span> entry<span class="operator">.</span>length;
|
|
}
|
|
|
|
sha1s <span class="operator">=</span> metaInfo<span class="operator">.</span>sha1Sums();
|
|
pieceLength <span class="operator">=</span> metaInfo<span class="operator">.</span>pieceLength();
|
|
}
|
|
numPieces <span class="operator">=</span> sha1s<span class="operator">.</span>size();
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
}
|
|
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> FileManager<span class="operator">::</span>readBlock(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="type">int</span> length)
|
|
{
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> block;
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> startReadIndex <span class="operator">=</span> (<span class="type"><a href="qtglobal.html#quint64-typedef">quint64</a></span>(pieceIndex) <span class="operator">*</span> pieceLength) <span class="operator">+</span> offset;
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> currentIndex <span class="operator">=</span> <span class="number">0</span>;
|
|
|
|
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; <span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</span> i <span class="operator"><</span> files<span class="operator">.</span>size() <span class="operator">&</span><span class="operator">&</span> length <span class="operator">></span> <span class="number">0</span>; <span class="operator">+</span><span class="operator">+</span>i) {
|
|
<span class="type"><a href="qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> files<span class="operator">[</span>i<span class="operator">]</span>;
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> currentFileSize <span class="operator">=</span> fileSizes<span class="operator">.</span>at(i);
|
|
<span class="keyword">if</span> ((currentIndex <span class="operator">+</span> currentFileSize) <span class="operator">></span> startReadIndex) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>isOpen()) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to read from file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">break</span>;
|
|
}
|
|
}
|
|
|
|
file<span class="operator">-</span><span class="operator">></span>seek(startReadIndex <span class="operator">-</span> currentIndex);
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> chunk <span class="operator">=</span> file<span class="operator">-</span><span class="operator">></span>read(<a href="qtglobal.html#qMin">qMin</a><span class="operator"><</span><span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">></span>(length<span class="operator">,</span> currentFileSize <span class="operator">-</span> file<span class="operator">-</span><span class="operator">></span>pos()));
|
|
file<span class="operator">-</span><span class="operator">></span>close();
|
|
|
|
block <span class="operator">+</span><span class="operator">=</span> chunk;
|
|
length <span class="operator">-</span><span class="operator">=</span> chunk<span class="operator">.</span>size();
|
|
startReadIndex <span class="operator">+</span><span class="operator">=</span> chunk<span class="operator">.</span>size();
|
|
<span class="keyword">if</span> (length <span class="operator"><</span> <span class="number">0</span>) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to read from file %1 (read %3 bytes): %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString())<span class="operator">.</span>arg(length);
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">break</span>;
|
|
}
|
|
}
|
|
currentIndex <span class="operator">+</span><span class="operator">=</span> currentFileSize;
|
|
}
|
|
<span class="keyword">return</span> block;
|
|
}
|
|
|
|
<span class="type">bool</span> FileManager<span class="operator">::</span>writeBlock(<span class="type">int</span> pieceIndex<span class="operator">,</span> <span class="type">int</span> offset<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> <span class="operator">&</span>data)
|
|
{
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> startWriteIndex <span class="operator">=</span> (<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>(pieceIndex) <span class="operator">*</span> pieceLength) <span class="operator">+</span> offset;
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> currentIndex <span class="operator">=</span> <span class="number">0</span>;
|
|
<span class="type">int</span> bytesToWrite <span class="operator">=</span> data<span class="operator">.</span>size();
|
|
<span class="type">int</span> written <span class="operator">=</span> <span class="number">0</span>;
|
|
|
|
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; <span class="operator">!</span>quit <span class="operator">&</span><span class="operator">&</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="qfile.html">QFile</a></span> <span class="operator">*</span>file <span class="operator">=</span> files<span class="operator">[</span>i<span class="operator">]</span>;
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> currentFileSize <span class="operator">=</span> fileSizes<span class="operator">.</span>at(i);
|
|
|
|
<span class="keyword">if</span> ((currentIndex <span class="operator">+</span> currentFileSize) <span class="operator">></span> startWriteIndex) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>isOpen()) {
|
|
<span class="keyword">if</span> (<span class="operator">!</span>file<span class="operator">-</span><span class="operator">></span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadWrite)) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to write to file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">break</span>;
|
|
}
|
|
}
|
|
|
|
file<span class="operator">-</span><span class="operator">></span>seek(startWriteIndex <span class="operator">-</span> currentIndex);
|
|
<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> bytesWritten <span class="operator">=</span> file<span class="operator">-</span><span class="operator">></span>write(data<span class="operator">.</span>constData() <span class="operator">+</span> written<span class="operator">,</span>
|
|
<a href="qtglobal.html#qMin">qMin</a><span class="operator"><</span><span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">></span>(bytesToWrite<span class="operator">,</span> currentFileSize <span class="operator">-</span> file<span class="operator">-</span><span class="operator">></span>pos()));
|
|
file<span class="operator">-</span><span class="operator">></span>close();
|
|
|
|
<span class="keyword">if</span> (bytesWritten <span class="operator"><</span><span class="operator">=</span> <span class="number">0</span>) {
|
|
errString <span class="operator">=</span> tr(<span class="string">"Failed to write to file %1: %2"</span>)
|
|
<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>fileName())<span class="operator">.</span>arg(file<span class="operator">-</span><span class="operator">></span>errorString());
|
|
<span class="keyword">emit</span> error();
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
}
|
|
|
|
written <span class="operator">+</span><span class="operator">=</span> bytesWritten;
|
|
startWriteIndex <span class="operator">+</span><span class="operator">=</span> bytesWritten;
|
|
bytesToWrite <span class="operator">-</span><span class="operator">=</span> bytesWritten;
|
|
<span class="keyword">if</span> (bytesToWrite <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>)
|
|
<span class="keyword">break</span>;
|
|
}
|
|
currentIndex <span class="operator">+</span><span class="operator">=</span> currentFileSize;
|
|
}
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
}
|
|
|
|
<span class="type">void</span> FileManager<span class="operator">::</span>verifyFileContents()
|
|
{
|
|
<span class="comment">// Verify all pieces the first time</span>
|
|
<span class="keyword">if</span> (newPendingVerificationRequests<span class="operator">.</span>isEmpty()) {
|
|
<span class="keyword">if</span> (verifiedPieces<span class="operator">.</span>count(<span class="keyword">true</span>) <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) {
|
|
verifiedPieces<span class="operator">.</span>resize(sha1s<span class="operator">.</span>size());
|
|
|
|
<span class="type">int</span> oldPercent <span class="operator">=</span> <span class="number">0</span>;
|
|
<span class="keyword">if</span> (<span class="operator">!</span>newFile) {
|
|
<span class="type">int</span> numPieces <span class="operator">=</span> sha1s<span class="operator">.</span>size();
|
|
|
|
<span class="keyword">for</span> (<span class="type">int</span> index <span class="operator">=</span> <span class="number">0</span>; index <span class="operator"><</span> numPieces; <span class="operator">+</span><span class="operator">+</span>index) {
|
|
verifySinglePiece(index);
|
|
|
|
<span class="type">int</span> percent <span class="operator">=</span> ((index <span class="operator">+</span> <span class="number">1</span>) <span class="operator">*</span> <span class="number">100</span>) <span class="operator">/</span> numPieces;
|
|
<span class="keyword">if</span> (oldPercent <span class="operator">!</span><span class="operator">=</span> percent) {
|
|
<span class="keyword">emit</span> verificationProgress(percent);
|
|
oldPercent <span class="operator">=</span> percent;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
<span class="keyword">emit</span> verificationDone();
|
|
<span class="keyword">return</span>;
|
|
}
|
|
|
|
<span class="comment">// Verify all pending pieces</span>
|
|
foreach (<span class="type">int</span> index<span class="operator">,</span> newPendingVerificationRequests)
|
|
<span class="keyword">emit</span> pieceVerified(index<span class="operator">,</span> verifySinglePiece(index));
|
|
}
|
|
|
|
<span class="type">bool</span> FileManager<span class="operator">::</span>verifySinglePiece(<span class="type">int</span> pieceIndex)
|
|
{
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> block <span class="operator">=</span> readBlock(pieceIndex<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> pieceLength);
|
|
<span class="type"><a href="qbytearray.html">QByteArray</a></span> sha1Sum <span class="operator">=</span> <span class="type"><a href="qcryptographichash.html">QCryptographicHash</a></span><span class="operator">::</span>hash(block<span class="operator">,</span> <span class="type"><a href="qcryptographichash.html">QCryptographicHash</a></span><span class="operator">::</span>Sha1);
|
|
|
|
<span class="keyword">if</span> (sha1Sum <span class="operator">!</span><span class="operator">=</span> sha1s<span class="operator">.</span>at(pieceIndex))
|
|
<span class="keyword">return</span> <span class="keyword">false</span>;
|
|
verifiedPieces<span class="operator">.</span>setBit(pieceIndex);
|
|
<span class="keyword">return</span> <span class="keyword">true</span>;
|
|
}
|
|
|
|
<span class="type">void</span> FileManager<span class="operator">::</span>wakeUp()
|
|
{
|
|
<span class="type"><a href="qmutexlocker.html">QMutexLocker</a></span> locker(<span class="operator">&</span>mutex);
|
|
wokeUp <span class="operator">=</span> <span class="keyword">false</span>;
|
|
<span class="type">cond</span><span class="operator">.</span>wakeOne();
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@network/torrent/filemanager.cpp -->
|
|
</div>
|
|
</div>
|
|
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<p>
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
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<br />
|
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<p>
|
|
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.</p>
|
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<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
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www.qt-project.org</a>.</p>
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<br />
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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