src/qt/rpcconsole.cpp

   1 #include "rpcconsole.h"
   2 #include "ui_rpcconsole.h"
   3
   4 #include "clientmodel.h"
   5 #include "bitcoinrpc.h"
   6 #include "guiutil.h"
   7 #include "dialogwindowflags.h"
   8
   9 #include <QTime>
  10 #include <QTimer>
  11 #include <QThread>
  12 #include <QTextEdit>
  13 #include <QKeyEvent>
  14 #include <QUrl>
  15 #include <QScrollBar>
  16
  17 #include <openssl/crypto.h>
  18 #include <db_cxx.h>
  19
  20 // TODO: make it possible to filter out categories (esp debug messages when implemented)
  21 // TODO: receive errors and debug messages through ClientModel
  22
  23 const int CONSOLE_HISTORY = 50;
  24
  25 const QSize ICON_SIZE(24, 24);
  26
  27 const int INITIAL_TRAFFIC_GRAPH_MINS = 30;
  28
  29 const struct {
  30     const char *url;
  31     const char *source;
  32 } ICON_MAPPING[] = {
  33     {"cmd-request", ":/icons/tx_input"},
  34     {"cmd-reply", ":/icons/tx_output"},
  35     {"cmd-error", ":/icons/tx_output"},
  36     {"misc", ":/icons/tx_inout"},
  37     {NULL, NULL}
  38 };
  39
  40 /* Object for executing console RPC commands in a separate thread.
  41 */
  42 class RPCExecutor: public QObject
  43 {
  44     Q_OBJECT
  45 public slots:
  46     void start();
  47     void request(const QString &command);
  48 signals:
  49     void reply(int category, const QString &command);
  50 };
  51
  52 #include "rpcconsole.moc"
  53
  54 void RPCExecutor::start()
  55 {
  56    // Nothing to do
  57 }
  58
  59 /**
  60  * Split shell command line into a list of arguments. Aims to emulate \c bash and friends.
  61  *
  62  * - Arguments are delimited with whitespace
  63  * - Extra whitespace at the beginning and end and between arguments will be ignored
  64  * - Text can be "double" or 'single' quoted
  65  * - The backslash \c \ is used as escape character
  66  *   - Outside quotes, any character can be escaped
  67  *   - Within double quotes, only escape \c " and backslashes before a \c " or another backslash
  68  *   - Within single quotes, no escaping is possible and no special interpretation takes place
  69  *
  70  * @param[out]   args        Parsed arguments will be appended to this list
  71  * @param[in]    strCommand  Command line to split
  72  */
  73 bool parseCommandLine(std::vector<std::string> &args, const std::string &strCommand)
  74 {
  75     enum CmdParseState
  76     {
  77         STATE_EATING_SPACES,
  78         STATE_ARGUMENT,
  79         STATE_SINGLEQUOTED,
  80         STATE_DOUBLEQUOTED,
  81         STATE_ESCAPE_OUTER,
  82         STATE_ESCAPE_DOUBLEQUOTED
  83     } state = STATE_EATING_SPACES;
  84     std::string curarg;
  85     foreach(char ch, strCommand)
  86     {
  87         switch(state)
  88         {
  89         case STATE_ARGUMENT: // In or after argument
  90         case STATE_EATING_SPACES: // Handle runs of whitespace
  91             switch(ch)
  92             {
  93             case '"': state = STATE_DOUBLEQUOTED; break;
  94             case '\'': state = STATE_SINGLEQUOTED; break;
  95             case '\\': state = STATE_ESCAPE_OUTER; break;
  96             case ' ': case '\n': case '\t':
  97                 if(state == STATE_ARGUMENT) // Space ends argument
  98                 {
  99                     args.push_back(curarg);
 100                     curarg.clear();
 101                 }
 102                 state = STATE_EATING_SPACES;
 103                 break;
 104             default: curarg += ch; state = STATE_ARGUMENT;
 105             }
 106             break;
 107         case STATE_SINGLEQUOTED: // Single-quoted string
 108             switch(ch)
 109             {
 110             case '\'': state = STATE_ARGUMENT; break;
 111             default: curarg += ch;
 112             }
 113             break;
 114         case STATE_DOUBLEQUOTED: // Double-quoted string
 115             switch(ch)
 116             {
 117             case '"': state = STATE_ARGUMENT; break;
 118             case '\\': state = STATE_ESCAPE_DOUBLEQUOTED; break;
 119             default: curarg += ch;
 120             }
 121             break;
 122         case STATE_ESCAPE_OUTER: // '\' outside quotes
 123             curarg += ch; state = STATE_ARGUMENT;
 124             break;
 125         case STATE_ESCAPE_DOUBLEQUOTED: // '\' in double-quoted text
 126             if(ch != '"' && ch != '\\') curarg += '\\'; // keep '\' for everything but the quote and '\' itself
 127             curarg += ch; state = STATE_DOUBLEQUOTED;
 128             break;
 129         }
 130     }
 131     switch(state) // final state
 132     {
 133     case STATE_EATING_SPACES:
 134         return true;
 135     case STATE_ARGUMENT:
 136         args.push_back(curarg);
 137         return true;
 138     default: // ERROR to end in one of the other states
 139         return false;
 140     }
 141 }
 142
 143 void RPCExecutor::request(const QString &command)
 144 {
 145     std::vector<std::string> args;
 146     if(!parseCommandLine(args, command.toStdString()))
 147     {
 148         emit reply(RPCConsole::CMD_ERROR, QString("Parse error: unbalanced ' or \""));
 149         return;
 150     }
 151     if(args.empty())
 152         return; // Nothing to do
 153     try
 154     {
 155         std::string strPrint;
 156         // Convert argument list to JSON objects in method-dependent way,
 157         // and pass it along with the method name to the dispatcher.
 158         json_spirit::Value result = tableRPC.execute(
 159             args[0],
 160             RPCConvertValues(args[0], std::vector<std::string>(args.begin() + 1, args.end())));
 161
 162         // Format result reply
 163         if (result.type() == json_spirit::null_type)
 164             strPrint = "";
 165         else if (result.type() == json_spirit::str_type)
 166             strPrint = result.get_str();
 167         else
 168             strPrint = write_string(result, true);
 169
 170         emit reply(RPCConsole::CMD_REPLY, QString::fromStdString(strPrint));
 171     }
 172     catch (json_spirit::Object& objError)
 173     {
 174         try // Nice formatting for standard-format error
 175         {
 176             int code = find_value(objError, "code").get_int();
 177             std::string message = find_value(objError, "message").get_str();
 178             emit reply(RPCConsole::CMD_ERROR, QString::fromStdString(message) + " (code " + QString::number(code) + ")");
 179         }
 180         catch(std::runtime_error &) // raised when converting to invalid type, i.e. missing code or message
 181         {   // Show raw JSON object
 182             emit reply(RPCConsole::CMD_ERROR, QString::fromStdString(write_string(json_spirit::Value(objError), false)));
 183         }
 184     }
 185     catch (std::exception& e)
 186     {
 187         emit reply(RPCConsole::CMD_ERROR, QString("Error: ") + QString::fromStdString(e.what()));
 188     }
 189 }
 190
 191 RPCConsole::RPCConsole(QWidget *parent) :
 192     QWidget(parent),
 193     ui(new Ui::RPCConsole),
 194     historyPtr(0)
 195 {
 196     ui->setupUi(this);
 197
 198 #ifndef Q_OS_MAC
 199     ui->openDebugLogfileButton->setIcon(QIcon(":/icons/export"));
 200     ui->openConfigurationfileButton->setIcon(QIcon(":/icons/export"));
 201     ui->showCLOptionsButton->setIcon(QIcon(":/icons/options"));
 202 #endif
 203
 204     // Install event filter for up and down arrow
 205     ui->lineEdit->installEventFilter(this);
 206     ui->messagesWidget->installEventFilter(this);
 207
 208     connect(ui->clearButton, SIGNAL(clicked()), this, SLOT(clear()));
 209     connect(ui->btnClearTrafficGraph, SIGNAL(clicked()), ui->trafficGraph, SLOT(clear()));
 210
 211     // set library version labels
 212     ui->openSSLVersion->setText(SSLeay_version(SSLEAY_VERSION));
 213     ui->berkeleyDBVersion->setText(DbEnv::version(0, 0, 0));
 214
 215     startExecutor();
 216     setTrafficGraphRange(INITIAL_TRAFFIC_GRAPH_MINS);
 217
 218     clear();
 219 }
 220
 221 RPCConsole::~RPCConsole()
 222 {
 223     emit stopExecutor();
 224     delete ui;
 225 }
 226
 227 bool RPCConsole::eventFilter(QObject* obj, QEvent *event)
 228 {
 229     if(event->type() == QEvent::KeyPress) // Special key handling
 230     {
 231         QKeyEvent *keyevt = static_cast<QKeyEvent*>(event);
 232         int key = keyevt->key();
 233         Qt::KeyboardModifiers mod = keyevt->modifiers();
 234         switch(key)
 235         {
 236         case Qt::Key_Up: if(obj == ui->lineEdit) { browseHistory(-1); return true; } break;
 237         case Qt::Key_Down: if(obj == ui->lineEdit) { browseHistory(1); return true; } break;
 238         case Qt::Key_PageUp: /* pass paging keys to messages widget */
 239         case Qt::Key_PageDown:
 240             if(obj == ui->lineEdit)
 241             {
 242                 QApplication::postEvent(ui->messagesWidget, new QKeyEvent(*keyevt));
 243                 return true;
 244             }
 245             break;
 246         default:
 247             // Typing in messages widget brings focus to line edit, and redirects key there
 248             // Exclude most combinations and keys that emit no text, except paste shortcuts
 249             if(obj == ui->messagesWidget && (
 250                   (!mod && !keyevt->text().isEmpty() && key != Qt::Key_Tab) ||
 251                   ((mod & Qt::ControlModifier) && key == Qt::Key_V) ||
 252                   ((mod & Qt::ShiftModifier) && key == Qt::Key_Insert)))
 253             {
 254                 ui->lineEdit->setFocus();
 255                 QApplication::postEvent(ui->lineEdit, new QKeyEvent(*keyevt));
 256                 return true;
 257             }
 258         }
 259     }
 260     return QWidget::eventFilter(obj, event);
 261 }
 262
 263 void RPCConsole::setClientModel(ClientModel *model)
 264 {
 265     this->clientModel = model;
 266     ui->trafficGraph->setClientModel(model);
 267     if(model)
 268     {
 269         // Subscribe to information, replies, messages, errors
 270         connect(model, SIGNAL(numConnectionsChanged(int)), this, SLOT(setNumConnections(int)));
 271         connect(model, SIGNAL(numBlocksChanged(int,int)), this, SLOT(setNumBlocks(int,int)));
 272
 273         updateTrafficStats(model->getTotalBytesRecv(), model->getTotalBytesSent());
 274         connect(model, SIGNAL(bytesChanged(quint64,quint64)), this, SLOT(updateTrafficStats(quint64, quint64)));
 275         // Provide initial values
 276         ui->clientVersion->setText(model->formatFullVersion());
 277         ui->clientName->setText(model->clientName());
 278         ui->buildDate->setText(model->formatBuildDate());
 279         ui->startupTime->setText(model->formatClientStartupTime());
 280
 281         setNumConnections(model->getNumConnections());
 282         ui->isTestNet->setChecked(model->isTestNet());
 283
 284         setNumBlocks(model->getNumBlocks(), model->getNumBlocksOfPeers());
 285     }
 286 }
 287
 288 static QString categoryClass(int category)
 289 {
 290     switch(category)
 291     {
 292     case RPCConsole::CMD_REQUEST:  return "cmd-request"; break;
 293     case RPCConsole::CMD_REPLY:    return "cmd-reply"; break;
 294     case RPCConsole::CMD_ERROR:    return "cmd-error"; break;
 295     default:                       return "misc";
 296     }
 297 }
 298
 299 void RPCConsole::clear()
 300 {
 301     ui->messagesWidget->clear();
 302     ui->lineEdit->clear();
 303     ui->lineEdit->setFocus();
 304
 305     // Add smoothly scaled icon images.
 306     // (when using width/height on an img, Qt uses nearest instead of linear interpolation)
 307     for(int i=0; ICON_MAPPING[i].url; ++i)
 308     {
 309         ui->messagesWidget->document()->addResource(
 310                     QTextDocument::ImageResource,
 311                     QUrl(ICON_MAPPING[i].url),
 312                     QImage(ICON_MAPPING[i].source).scaled(ICON_SIZE, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
 313     }
 314
 315     // Set default style sheet
 316     ui->messagesWidget->document()->setDefaultStyleSheet(
 317                 "table { }"
 318                 "td.time { color: #808080; padding-top: 3px; } "
 319                 "td.message { font-family: Monospace; } "
 320                 "td.cmd-request { color: #006060; } "
 321                 "td.cmd-error { color: red; } "
 322                 "b { color: #006060; } "
 323                 );
 324
 325     message(CMD_REPLY, (tr("Welcome to the NovaCoin RPC console.") + "<br>" +
 326                         tr("Use up and down arrows to navigate history, and <b>Ctrl-L</b> to clear screen.") + "<br>" +
 327                         tr("Type <b>help</b> for an overview of available commands.")), true);
 328 }
 329
 330 void RPCConsole::message(int category, const QString &message, bool html)
 331 {
 332     QTime time = QTime::currentTime();
 333     QString timeString = time.toString();
 334     QString out;
 335     out += "<table><tr><td class=\"time\" width=\"65\">" + timeString + "</td>";
 336     out += "<td class=\"icon\" width=\"32\"><img src=\"" + categoryClass(category) + "\"></td>";
 337     out += "<td class=\"message " + categoryClass(category) + "\" valign=\"middle\">";
 338     if(html)
 339         out += message;
 340     else
 341         out += GUIUtil::HtmlEscape(message, true);
 342     out += "</td></tr></table>";
 343     ui->messagesWidget->append(out);
 344 }
 345
 346 void RPCConsole::setNumConnections(int count)
 347 {
 348     if (!clientModel)
 349         return;
 350
 351     QString connections = QString::number(count) + " (";
 352     connections += tr("Inbound:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_IN)) + " / ";
 353     connections += tr("Outbound:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_OUT)) + ")";
 354
 355     ui->numberOfConnections->setText(connections);
 356 }
 357
 358 void RPCConsole::setNumBlocks(int count, int countOfPeers)
 359 {
 360     ui->numberOfBlocks->setText(QString::number(count));
 361     ui->totalBlocks->setText(QString::number(countOfPeers));
 362     if(clientModel)
 363     {
 364         // If there is no current number available display N/A instead of 0, which can't ever be true
 365         ui->totalBlocks->setText(clientModel->getNumBlocksOfPeers() == 0 ? tr("N/A") : QString::number(clientModel->getNumBlocksOfPeers()));
 366         ui->lastBlockTime->setText(clientModel->getLastBlockDate().toString());
 367     }
 368 }
 369
 370 void RPCConsole::on_lineEdit_returnPressed()
 371 {
 372     QString cmd = ui->lineEdit->text();
 373     ui->lineEdit->clear();
 374
 375     if(!cmd.isEmpty())
 376     {
 377         message(CMD_REQUEST, cmd);
 378         emit cmdRequest(cmd);
 379         // Remove command, if already in history
 380         history.removeOne(cmd);
 381         // Append command to history
 382         history.append(cmd);
 383         // Enforce maximum history size
 384         while(history.size() > CONSOLE_HISTORY)
 385             history.removeFirst();
 386         // Set pointer to end of history
 387         historyPtr = history.size();
 388         // Scroll console view to end
 389         scrollToEnd();
 390     }
 391 }
 392
 393 void RPCConsole::browseHistory(int offset)
 394 {
 395     historyPtr += offset;
 396     if(historyPtr < 0)
 397         historyPtr = 0;
 398     if(historyPtr > history.size())
 399         historyPtr = history.size();
 400     QString cmd;
 401     if(historyPtr < history.size())
 402         cmd = history.at(historyPtr);
 403     ui->lineEdit->setText(cmd);
 404 }
 405
 406 void RPCConsole::startExecutor()
 407 {
 408     QThread* thread = new QThread;
 409     RPCExecutor *executor = new RPCExecutor();
 410     executor->moveToThread(thread);
 411
 412     // Notify executor when thread started (in executor thread)
 413     connect(thread, SIGNAL(started()), executor, SLOT(start()));
 414     // Replies from executor object must go to this object
 415     connect(executor, SIGNAL(reply(int,QString)), this, SLOT(message(int,QString)));
 416     // Requests from this object must go to executor
 417     connect(this, SIGNAL(cmdRequest(QString)), executor, SLOT(request(QString)));
 418     // On stopExecutor signal
 419     // - queue executor for deletion (in execution thread)
 420     // - quit the Qt event loop in the execution thread
 421     connect(this, SIGNAL(stopExecutor()), executor, SLOT(deleteLater()));
 422     connect(this, SIGNAL(stopExecutor()), thread, SLOT(quit()));
 423     // Queue the thread for deletion (in this thread) when it is finished
 424     connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
 425
 426     // Default implementation of QThread::run() simply spins up an event loop in the thread,
 427     // which is what we want.
 428     thread->start();
 429 }
 430
 431 void RPCConsole::on_tabWidget_currentChanged(int index)
 432 {
 433     if(ui->tabWidget->widget(index) == ui->tab_console)
 434     {
 435         ui->lineEdit->setFocus();
 436     }
 437 }
 438
 439 void RPCConsole::on_openDebugLogfileButton_clicked()
 440 {
 441     GUIUtil::openDebugLogfile();
 442 }
 443
 444 void RPCConsole::on_openConfigurationfileButton_clicked()
 445 {
 446     GUIUtil::openConfigfile();
 447 }
 448
 449 void RPCConsole::scrollToEnd()
 450 {
 451     QScrollBar *scrollbar = ui->messagesWidget->verticalScrollBar();
 452     scrollbar->setValue(scrollbar->maximum());
 453 }
 454
 455 void RPCConsole::on_showCLOptionsButton_clicked()
 456 {
 457     GUIUtil::HelpMessageBox help;
 458     help.exec();
 459 }
 460 void RPCConsole::on_sldGraphRange_valueChanged(int value)
 461 {
 462     const int multiplier = 5; // each position on the slider represents 5 min
 463     int mins = value * multiplier;
 464     setTrafficGraphRange(mins);
 465 }
 466
 467 QString RPCConsole::FormatBytes(quint64 bytes)
 468 {
 469     if(bytes < 1024)
 470         return QString(tr("%1 B")).arg(bytes);
 471     if(bytes < 1024 * 1024)
 472         return QString(tr("%1 KB")).arg(bytes / 1024);
 473     if(bytes < 1024 * 1024 * 1024)
 474         return QString(tr("%1 MB")).arg(bytes / 1024 / 1024);
 475
 476     return QString(tr("%1 GB")).arg(bytes / 1024 / 1024 / 1024);
 477 }
 478
 479 void RPCConsole::setTrafficGraphRange(int mins)
 480 {
 481     ui->trafficGraph->setGraphRangeMins(mins);
 482     ui->lblGraphRange->setText(GUIUtil::formatDurationStr(mins * 60));
 483 }
 484
 485 void RPCConsole::updateTrafficStats(quint64 totalBytesIn, quint64 totalBytesOut)
 486 {
 487     ui->lblBytesIn->setText(FormatBytes(totalBytesIn));
 488     ui->lblBytesOut->setText(FormatBytes(totalBytesOut));
 489 }
 490
 491 void RPCConsole::resizeEvent(QResizeEvent *event)
 492 {
 493     QWidget::resizeEvent(event);
 494 }
 495
 496 void RPCConsole::showEvent(QShowEvent *event)
 497 {
 498     QWidget::showEvent(event);
 499
 500     if (!clientModel)
 501         return;
 502 }
 503
 504 void RPCConsole::hideEvent(QHideEvent *event)
 505 {
 506     QWidget::hideEvent(event);
 507
 508     if (!clientModel)
 509         return;
 510 }
 511
 512 void RPCConsole::keyPressEvent(QKeyEvent *event)
 513 {
 514 #ifdef ANDROID
 515     if(windowType() != Qt::Widget && event->key() == Qt::Key_Back)
 516     {
 517         close();
 518     }
 519 #else
 520     if(windowType() != Qt::Widget && event->key() == Qt::Key_Escape)
 521     {
 522         close();
 523     }
 524 #endif
 525 }