src/webui/webui.cpp

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2015, 2023  Vladimir Golovnev <glassez@yandex.ru>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #include "webui.h"
  30
  31 #include "base/global.h"
  32 #include "base/http/server.h"
  33 #include "base/logger.h"
  34 #include "base/net/dnsupdater.h"
  35 #include "base/net/portforwarder.h"
  36 #include "base/path.h"
  37 #include "base/preferences.h"
  38 #include "base/utils/io.h"
  39 #include "base/utils/net.h"
  40 #include "base/utils/password.h"
  41 #include "webapplication.h"
  42
  43 WebUI::WebUI(IApplication *app, const QByteArray &tempPasswordHash)
  44     : ApplicationComponent(app)
  45     , m_passwordHash {tempPasswordHash}
  46 {
  47     configure();
  48     connect(Preferences::instance(), &Preferences::changed, this, &WebUI::configure);
  49 }
  50
  51 void WebUI::configure()
  52 {
  53     m_isErrored = false; // clear previous error state
  54
  55     const Preferences *pref = Preferences::instance();
  56     const bool isEnabled = pref->isWebUIEnabled();
  57     const QString username = pref->getWebUIUsername();
  58     if (const QByteArray passwordHash = pref->getWebUIPassword(); !passwordHash.isEmpty())
  59         m_passwordHash = passwordHash;
  60
  61     if (isEnabled && (username.isEmpty() || m_passwordHash.isEmpty()))
  62     {
  63         setError(tr("Credentials are not set"));
  64     }
  65
  66     const QString portForwardingProfile = u"webui"_s;
  67
  68     if (isEnabled && !m_isErrored)
  69     {
  70         const quint16 port = pref->getWebUIPort();
  71
  72         // Port forwarding
  73         auto *portForwarder = Net::PortForwarder::instance();
  74         if (pref->useUPnPForWebUIPort())
  75         {
  76             portForwarder->setPorts(portForwardingProfile, {port});
  77         }
  78         else
  79         {
  80             portForwarder->removePorts(portForwardingProfile);
  81         }
  82
  83         // http server
  84         const QString serverAddressString = pref->getWebUIAddress();
  85         const auto serverAddress = ((serverAddressString == u"*") || serverAddressString.isEmpty())
  86             ? QHostAddress::Any : QHostAddress(serverAddressString);
  87
  88         if (!m_httpServer)
  89         {
  90             m_webapp = new WebApplication(app(), this);
  91             m_httpServer = new Http::Server(m_webapp, this);
  92         }
  93         else
  94         {
  95             if ((m_httpServer->serverAddress() != serverAddress) || (m_httpServer->serverPort() != port))
  96                 m_httpServer->close();
  97         }
  98
  99         m_webapp->setUsername(username);
 100         m_webapp->setPasswordHash(m_passwordHash);
 101
 102         if (pref->isWebUIHttpsEnabled())
 103         {
 104             const auto readData = [](const Path &path) -> QByteArray
 105             {
 106                 const auto readResult = Utils::IO::readFile(path, Utils::Net::MAX_SSL_FILE_SIZE);
 107                 return readResult.value_or(QByteArray());
 108             };
 109             const QByteArray cert = readData(pref->getWebUIHttpsCertificatePath());
 110             const QByteArray key = readData(pref->getWebUIHttpsKeyPath());
 111
 112             const bool success = m_httpServer->setupHttps(cert, key);
 113             if (success)
 114                 LogMsg(tr("WebUI: HTTPS setup successful"));
 115             else
 116                 LogMsg(tr("WebUI: HTTPS setup failed, fallback to HTTP"), Log::CRITICAL);
 117         }
 118         else
 119         {
 120             m_httpServer->disableHttps();
 121         }
 122
 123         if (!m_httpServer->isListening())
 124         {
 125             const bool success = m_httpServer->listen(serverAddress, port);
 126             if (success)
 127             {
 128                 LogMsg(tr("WebUI: Now listening on IP: %1, port: %2").arg(serverAddressString).arg(port));
 129             }
 130             else
 131             {
 132                 setError(tr("Unable to bind to IP: %1, port: %2. Reason: %3")
 133                         .arg(serverAddressString).arg(port).arg(m_httpServer->errorString()));
 134             }
 135         }
 136
 137         // DynDNS
 138         if (pref->isDynDNSEnabled())
 139         {
 140             if (!m_dnsUpdater)
 141                 m_dnsUpdater = new Net::DNSUpdater(this);
 142             else
 143                 m_dnsUpdater->updateCredentials();
 144         }
 145         else
 146         {
 147             delete m_dnsUpdater;
 148         }
 149     }
 150     else
 151     {
 152         Net::PortForwarder::instance()->removePorts(portForwardingProfile);
 153
 154         delete m_httpServer;
 155         delete m_webapp;
 156         delete m_dnsUpdater;
 157     }
 158 }
 159
 160 void WebUI::setError(const QString &message)
 161 {
 162     m_isErrored = true;
 163     m_errorMsg = message;
 164
 165     const QString logMessage = u"WebUI: " + m_errorMsg;
 166     LogMsg(logMessage, Log::CRITICAL);
 167     qCritical() << logMessage;
 168
 169     emit fatalError();
 170 }
 171
 172 bool WebUI::isErrored() const
 173 {
 174     return m_isErrored;
 175 }
 176
 177 QString WebUI::errorMessage() const
 178 {
 179     return m_errorMsg;
 180 }