src/search/filenamesearchprotocol.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Peter Penz <peter.penz19@gmail.com>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "filenamesearchprotocol.h"
  21
  22 #include <KComponentData>
  23 #include <KDirLister>
  24 #include <KFileItem>
  25 #include <KIO/NetAccess>
  26 #include <KIO/Job>
  27 #include <KUrl>
  28 #include <ktemporaryfile.h>
  29
  30 #include <QCoreApplication>
  31 #include <QEventLoop>
  32 #include <QRegExp>
  33
  34 FileNameSearchProtocol::FileNameSearchProtocol( const QByteArray &pool, const QByteArray &app ) :
  35     SlaveBase("search", pool, app),
  36     m_checkContent(false),
  37     m_regExp(0),
  38     m_iteratedDirs()
  39 {
  40 }
  41
  42 FileNameSearchProtocol::~FileNameSearchProtocol()
  43 {
  44     cleanup();
  45 }
  46
  47 void FileNameSearchProtocol::listDir(const KUrl& url)
  48 {
  49     cleanup();
  50
  51     const QString search = url.queryItem("search");
  52     if (!search.isEmpty()) {
  53         m_regExp = new QRegExp(search, Qt::CaseInsensitive, QRegExp::Wildcard);
  54     }
  55
  56     m_checkContent = false;
  57     const QString checkContent = url.queryItem("checkContent");
  58     if (checkContent == QLatin1String("yes")) {
  59         m_checkContent = true;
  60     }
  61
  62     const QString urlString = url.queryItem("url");
  63     searchDirectory(KUrl(urlString));
  64
  65     cleanup();
  66     finished();
  67 }
  68
  69 void FileNameSearchProtocol::searchDirectory(const KUrl& directory)
  70 {
  71     if (directory.path() == QLatin1String("/proc")) {
  72         // Don't try to iterate the /proc directory of Linux
  73         return;
  74     }
  75
  76     // Get all items of the directory
  77     KDirLister *dirLister = new KDirLister();
  78     dirLister->setDelayedMimeTypes(false);
  79     dirLister->setAutoErrorHandlingEnabled(false, 0);
  80     dirLister->openUrl(directory);
  81
  82     QEventLoop eventLoop;
  83     QObject::connect(dirLister, SIGNAL(canceled()), &eventLoop, SLOT(quit()));
  84     QObject::connect(dirLister, SIGNAL(completed()), &eventLoop, SLOT(quit()));
  85     eventLoop.exec();
  86
  87     // Visualize all items that match the search pattern
  88     QList<KUrl> pendingDirs;
  89     const KFileItemList items = dirLister->items();
  90     foreach (const KFileItem& item, items) {
  91         bool addItem = false;
  92         if (!m_regExp || item.name().contains(*m_regExp)) {
  93             addItem = true;
  94         } else if (m_checkContent && item.determineMimeType()->is(QLatin1String("text/plain"))) {
  95             addItem = contentContainsPattern(item.url());
  96         }
  97
  98         if (addItem) {
  99             KIO::UDSEntry entry = item.entry();
 100             entry.insert(KIO::UDSEntry::UDS_URL, item.url().url() );
 101             listEntry(entry,false);
 102         }
 103
 104         if (item.isDir()) {
 105             if (item.isLink()) {
 106                 // Assure that no endless searching is done in directories that
 107                 // have already been iterated.
 108                 const KUrl linkDest(item.url(), item.linkDest());
 109                 if (!m_iteratedDirs.contains(linkDest.path())) {
 110                     pendingDirs.append(linkDest);
 111                 }
 112             } else {
 113                 pendingDirs.append(item.url());
 114             }
 115         }
 116     }
 117     listEntry(KIO::UDSEntry(), true);
 118
 119     m_iteratedDirs.insert(directory.path());
 120
 121     delete dirLister;
 122     dirLister = 0;
 123
 124     // Recursively iterate all sub directories
 125     foreach (const KUrl& pendingDir, pendingDirs) {
 126         searchDirectory(pendingDir);
 127     }
 128 }
 129
 130 bool FileNameSearchProtocol::contentContainsPattern(const KUrl& fileName) const
 131 {
 132     Q_ASSERT(m_regExp);
 133
 134     QString path;
 135     KTemporaryFile tempFile;
 136
 137     if (fileName.isLocalFile()) {
 138         path = fileName.path();
 139     } else if (tempFile.open()) {
 140         KIO::Job* getJob = KIO::file_copy(fileName,
 141                                           tempFile.fileName(),
 142                                           -1,
 143                                           KIO::Overwrite | KIO::HideProgressInfo);
 144         if (!KIO::NetAccess::synchronousRun(getJob, 0)) {
 145             // The non-local file could not be downloaded
 146             return false;
 147         }
 148         path = tempFile.fileName();
 149     } else {
 150         // No temporary file could be created for downloading non-local files
 151         return false;
 152     }
 153
 154     QFile file(path);
 155     if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
 156          return false;
 157     }
 158
 159      QTextStream in(&file);
 160      while (!in.atEnd()) {
 161          const QString line = in.readLine();
 162          if (line.contains(*m_regExp)) {
 163              return true;
 164          }
 165      }
 166
 167      return false;
 168 }
 169
 170 void FileNameSearchProtocol::cleanup()
 171 {
 172     delete m_regExp;
 173     m_regExp = 0;
 174     m_iteratedDirs.clear();
 175 }
 176
 177 extern "C" int KDE_EXPORT kdemain( int argc, char **argv )
 178 {
 179     KComponentData instance("kio_search");
 180     QCoreApplication app(argc, argv);
 181
 182     if (argc != 4) {
 183         fprintf(stderr, "Usage: kio_filenamesearch protocol domain-socket1 domain-socket2\n");
 184         exit(-1);
 185     }
 186
 187     FileNameSearchProtocol slave(argv[2], argv[3]);
 188     slave.dispatchLoop();
 189
 190     return 0;
 191 }