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_SCROLLBACK = 50;
  24 const int CONSOLE_HISTORY = 50;
  25
  26 const QSize ICON_SIZE(24, 24);
  27
  28 const int INITIAL_TRAFFIC_GRAPH_MINS = 30;
  29
  30 const struct {
  31     const char *url;
  32     const char *source;
  33 } ICON_MAPPING[] = {
  34     {"cmd-request", ":/icons/tx_input"},
  35     {"cmd-reply", ":/icons/tx_output"},
  36     {"cmd-error", ":/icons/tx_output"},
  37     {"misc", ":/icons/tx_inout"},
  38     {NULL, NULL}
  39 };
  40
  41 /* Object for executing console RPC commands in a separate thread.
  42 */
  43 class RPCExecutor: public QObject
  44 {
  45     Q_OBJECT
  46 public slots:
  47     void start();
  48     void request(const QString &command);
  49 signals:
  50     void reply(int category, const QString &command);
  51 };
  52
  53 #include "rpcconsole.moc"
  54
  55 void RPCExecutor::start()
  56 {
  57    // Nothing to do
  58 }
  59
  60 /**
  61  * Split shell command line into a list of arguments. Aims to emulate \c bash and friends.
  62  *
  63  * - Arguments are delimited with whitespace
  64  * - Extra whitespace at the beginning and end and between arguments will be ignored
  65  * - Text can be "double" or 'single' quoted
  66  * - The backslash \c \ is used as escape character
  67  *   - Outside quotes, any character can be escaped
  68  *   - Within double quotes, only escape \c " and backslashes before a \c " or another backslash
  69  *   - Within single quotes, no escaping is possible and no special interpretation takes place
  70  *
  71  * @param[out]   args        Parsed arguments will be appended to this list
  72  * @param[in]    strCommand  Command line to split
  73  */
  74 bool parseCommandLine(std::vector<std::string> &args, const std::string &strCommand)
  75 {
  76     enum CmdParseState
  77     {
  78         STATE_EATING_SPACES,
  79         STATE_ARGUMENT,
  80         STATE_SINGLEQUOTED,
  81         STATE_DOUBLEQUOTED,
  82         STATE_ESCAPE_OUTER,
  83         STATE_ESCAPE_DOUBLEQUOTED
  84     } state = STATE_EATING_SPACES;
  85     std::string curarg;
  86     foreach(char ch, strCommand)
  87     {
  88         switch(state)
  89         {
  90         case STATE_ARGUMENT: // In or after argument
  91         case STATE_EATING_SPACES: // Handle runs of whitespace
  92             switch(ch)
  93             {
  94             case '"': state = STATE_DOUBLEQUOTED; break;
  95             case '\'': state = STATE_SINGLEQUOTED; break;
  96             case '\\': state = STATE_ESCAPE_OUTER; break;
  97             case ' ': case '\n': case '\t':
  98                 if(state == STATE_ARGUMENT) // Space ends argument
  99                 {
 100                     args.push_back(curarg);
 101                     curarg.clear();
 102                 }
 103                 state = STATE_EATING_SPACES;
 104                 break;
 105             default: curarg += ch; state = STATE_ARGUMENT;
 106             }
 107             break;
 108         case STATE_SINGLEQUOTED: // Single-quoted string
 109             switch(ch)
 110             {
 111             case '\'': state = STATE_ARGUMENT; break;
 112             default: curarg += ch;
 113             }
 114             break;
 115         case STATE_DOUBLEQUOTED: // Double-quoted string
 116             switch(ch)
 117             {
 118             case '"': state = STATE_ARGUMENT; break;
 119             case '\\': state = STATE_ESCAPE_DOUBLEQUOTED; break;
 120             default: curarg += ch;
 121             }
 122             break;
 123         case STATE_ESCAPE_OUTER: // '\' outside quotes
 124             curarg += ch; state = STATE_ARGUMENT;
 125             break;
 126         case STATE_ESCAPE_DOUBLEQUOTED: // '\' in double-quoted text
 127             if(ch != '"' && ch != '\\') curarg += '\\'; // keep '\' for everything but the quote and '\' itself
 128             curarg += ch; state = STATE_DOUBLEQUOTED;
 129             break;
 130         }
 131     }
 132     switch(state) // final state
 133     {
 134     case STATE_EATING_SPACES:
 135         return true;
 136     case STATE_ARGUMENT:
 137         args.push_back(curarg);
 138         return true;
 139     default: // ERROR to end in one of the other states
 140         return false;
 141     }
 142 }
 143
 144 void RPCExecutor::request(const QString &command)
 145 {
 146     std::vector<std::string> args;
 147     if(!parseCommandLine(args, command.toStdString()))
 148     {
 149         emit reply(RPCConsole::CMD_ERROR, QString("Parse error: unbalanced ' or \""));
 150         return;
 151     }
 152     if(args.empty())
 153         return; // Nothing to do
 154     try
 155     {
 156         std::string strPrint;
 157         // Convert argument list to JSON objects in method-dependent way,
 158         // and pass it along with the method name to the dispatcher.
 159         json_spirit::Value result = tableRPC.execute(
 160             args[0],
 161             RPCConvertValues(args[0], std::vector<std::string>(args.begin() + 1, args.end())));
 162
 163         // Format result reply
 164         if (result.type() == json_spirit::null_type)
 165             strPrint = "";
 166         else if (result.type() == json_spirit::str_type)
 167             strPrint = result.get_str();
 168         else
 169             strPrint = write_string(result, true);
 170
 171         emit reply(RPCConsole::CMD_REPLY, QString::fromStdString(strPrint));
 172     }
 173     catch (json_spirit::Object& objError)
 174     {
 175         try // Nice formatting for standard-format error
 176         {
 177             int code = find_value(objError, "code").get_int();
 178             std::string message = find_value(objError, "message").get_str();
 179             emit reply(RPCConsole::CMD_ERROR, QString::fromStdString(message) + " (code " + QString::number(code) + ")");
 180         }
 181         catch(std::runtime_error &) // raised when converting to invalid type, i.e. missing code or message
 182         {   // Show raw JSON object
 183             emit reply(RPCConsole::CMD_ERROR, QString::fromStdString(write_string(json_spirit::Value(objError), false)));
 184         }
 185     }
 186     catch (std::exception& e)
 187     {
 188         emit reply(RPCConsole::CMD_ERROR, QString("Error: ") + QString::fromStdString(e.what()));
 189     }
 190 }
 191
 192 RPCConsole::RPCConsole(QWidget *parent) :
 193     QWidget(parent),
 194     ui(new Ui::RPCConsole),
 195     historyPtr(0)
 196 {
 197     ui->setupUi(this);
 198
 199 #ifndef Q_OS_MAC
 200     ui->openDebugLogfileButton->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; font-size: 12px; } "
 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     ui->numberOfConnections->setText(QString::number(count));
 349 }
 350
 351 void RPCConsole::setNumBlocks(int count, int countOfPeers)
 352 {
 353     ui->numberOfBlocks->setText(QString::number(count));
 354     ui->totalBlocks->setText(QString::number(countOfPeers));
 355     if(clientModel)
 356     {
 357         // If there is no current number available display N/A instead of 0, which can't ever be true
 358         ui->totalBlocks->setText(clientModel->getNumBlocksOfPeers() == 0 ? tr("N/A") : QString::number(clientModel->getNumBlocksOfPeers()));
 359         ui->lastBlockTime->setText(clientModel->getLastBlockDate().toString());
 360     }
 361 }
 362
 363 void RPCConsole::on_lineEdit_returnPressed()
 364 {
 365     QString cmd = ui->lineEdit->text();
 366     ui->lineEdit->clear();
 367
 368     if(!cmd.isEmpty())
 369     {
 370         message(CMD_REQUEST, cmd);
 371         emit cmdRequest(cmd);
 372         // Truncate history from current position
 373         history.erase(history.begin() + historyPtr, history.end());
 374         // Append command to history
 375         history.append(cmd);
 376         // Enforce maximum history size
 377         while(history.size() > CONSOLE_HISTORY)
 378             history.removeFirst();
 379         // Set pointer to end of history
 380         historyPtr = history.size();
 381         // Scroll console view to end
 382         scrollToEnd();
 383     }
 384 }
 385
 386 void RPCConsole::browseHistory(int offset)
 387 {
 388     historyPtr += offset;
 389     if(historyPtr < 0)
 390         historyPtr = 0;
 391     if(historyPtr > history.size())
 392         historyPtr = history.size();
 393     QString cmd;
 394     if(historyPtr < history.size())
 395         cmd = history.at(historyPtr);
 396     ui->lineEdit->setText(cmd);
 397 }
 398
 399 void RPCConsole::startExecutor()
 400 {
 401     QThread* thread = new QThread;
 402     RPCExecutor *executor = new RPCExecutor();
 403     executor->moveToThread(thread);
 404
 405     // Notify executor when thread started (in executor thread)
 406     connect(thread, SIGNAL(started()), executor, SLOT(start()));
 407     // Replies from executor object must go to this object
 408     connect(executor, SIGNAL(reply(int,QString)), this, SLOT(message(int,QString)));
 409     // Requests from this object must go to executor
 410     connect(this, SIGNAL(cmdRequest(QString)), executor, SLOT(request(QString)));
 411     // On stopExecutor signal
 412     // - queue executor for deletion (in execution thread)
 413     // - quit the Qt event loop in the execution thread
 414     connect(this, SIGNAL(stopExecutor()), executor, SLOT(deleteLater()));
 415     connect(this, SIGNAL(stopExecutor()), thread, SLOT(quit()));
 416     // Queue the thread for deletion (in this thread) when it is finished
 417     connect(thread, SIGNAL(finished()), thread, SLOT(deleteLater()));
 418
 419     // Default implementation of QThread::run() simply spins up an event loop in the thread,
 420     // which is what we want.
 421     thread->start();
 422 }
 423
 424 void RPCConsole::on_tabWidget_currentChanged(int index)
 425 {
 426     if(ui->tabWidget->widget(index) == ui->tab_console)
 427     {
 428         ui->lineEdit->setFocus();
 429     }
 430 }
 431
 432 void RPCConsole::on_openDebugLogfileButton_clicked()
 433 {
 434     GUIUtil::openDebugLogfile();
 435 }
 436
 437 void RPCConsole::scrollToEnd()
 438 {
 439     QScrollBar *scrollbar = ui->messagesWidget->verticalScrollBar();
 440     scrollbar->setValue(scrollbar->maximum());
 441 }
 442
 443 void RPCConsole::on_showCLOptionsButton_clicked()
 444 {
 445     GUIUtil::HelpMessageBox help;
 446     help.exec();
 447 }
 448 void RPCConsole::on_sldGraphRange_valueChanged(int value)
 449 {
 450     const int multiplier = 5; // each position on the slider represents 5 min
 451     int mins = value * multiplier;
 452     setTrafficGraphRange(mins);
 453 }
 454
 455 QString RPCConsole::FormatBytes(quint64 bytes)
 456 {
 457     if(bytes < 1024)
 458         return QString(tr("%1 B")).arg(bytes);
 459     if(bytes < 1024 * 1024)
 460         return QString(tr("%1 KB")).arg(bytes / 1024);
 461     if(bytes < 1024 * 1024 * 1024)
 462         return QString(tr("%1 MB")).arg(bytes / 1024 / 1024);
 463
 464     return QString(tr("%1 GB")).arg(bytes / 1024 / 1024 / 1024);
 465 }
 466
 467 void RPCConsole::setTrafficGraphRange(int mins)
 468 {
 469     ui->trafficGraph->setGraphRangeMins(mins);
 470     ui->lblGraphRange->setText(GUIUtil::formatDurationStr(mins * 60));
 471 }
 472
 473 void RPCConsole::updateTrafficStats(quint64 totalBytesIn, quint64 totalBytesOut)
 474 {
 475     ui->lblBytesIn->setText(FormatBytes(totalBytesIn));
 476     ui->lblBytesOut->setText(FormatBytes(totalBytesOut));
 477 }
 478
 479 void RPCConsole::resizeEvent(QResizeEvent *event)
 480 {
 481     QWidget::resizeEvent(event);
 482 }
 483
 484 void RPCConsole::showEvent(QShowEvent *event)
 485 {
 486     QWidget::showEvent(event);
 487
 488     if (!clientModel)
 489         return;
 490 }
 491
 492 void RPCConsole::hideEvent(QHideEvent *event)
 493 {
 494     QWidget::hideEvent(event);
 495
 496     if (!clientModel)
 497         return;
 498 }
 499
 500 void RPCConsole::keyPressEvent(QKeyEvent *event)
 501 {
 502     if(windowType() != Qt::Widget && event->key() == Qt::Key_Escape)
 503     {
 504         close();
 505     }
 506 }