Added listening r2 server for Jupyter + r2pipe

src/MainWindow.cpp

@@ -83,7 +83,7 @@ static void registerCustomFonts()
     ret = QFontDatabase::addApplicationFont(":/fonts/Inconsolata-Regular.ttf");
     assert(-1 != ret && "unable to register Inconsolata-Regular.ttf");
 
-    // do not issue a warning in release
+    // Do not issue a warning in release
     Q_UNUSED(ret)
 }
 
@@ -99,6 +99,7 @@ MainWindow::MainWindow(QWidget *parent) :
 
 MainWindow::~MainWindow()
 {
+    delete configuration;
 }
 
 void MainWindow::initUI()
@@ -389,22 +390,18 @@ void MainWindow::closeEvent(QCloseEvent *event)
     QMessageBox::StandardButton ret = QMessageBox::question(this, APPNAME,
                                       tr("Do you really want to exit?\nSave your project before closing!"),
                                       (QMessageBox::StandardButtons)(QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel));
-    //qDebug() << ret;
     if (ret == QMessageBox::Save)
     {
         if (saveProject(true))
         {
             saveSettings();
-            QMainWindow::closeEvent(event);
-        }
-        else
-        {
-            event->ignore();
         }
+        QMainWindow::closeEvent(event);
     }
     else if (ret == QMessageBox::Discard)
     {
         saveSettings();
+        QMainWindow::closeEvent(event);
     }
     else
     {

src/cutter.pro

@@ -93,7 +93,8 @@ SOURCES += \
     widgets/VTablesWidget.cpp \
     CutterApplication.cpp \
     utils/JupyterConnection.cpp \
-    widgets/JupyterWidget.cpp
+    widgets/JupyterWidget.cpp \
+    utils/CommandServer.cpp
 
 HEADERS  += \
     cutter.h \
@@ -156,7 +157,8 @@ HEADERS  += \
     CutterApplication.h \
     widgets/VTablesWidget.h \
     utils/JupyterConnection.h \
-    widgets/JupyterWidget.h
+    widgets/JupyterWidget.h \
+    utils/CommandServer.h
 
 FORMS    += \
     dialogs/AboutDialog.ui \

src/utils/CommandServer.cpp

@@ -0,0 +1,89 @@
+#include "CommandServer.h"
+#include "cutter.h"
+
+CommandServer::CommandServer(QObject *parent) : QObject(parent)
+{
+
+}
+
+CommandServer::~CommandServer()
+{
+
+}
+
+/**
+ * @brief Open a local TCP server on port 1234 to read and execute commands.
+ * This is useful for Jupyter Notebook to access radare2 context using r2pipe
+ * Example usage:
+ * import r2pipe; r2 = r2pipe.open('tcp://localhost:1234'); print(r2.cmd('i'))
+ */
+bool CommandServer::startCommandServer()
+{
+    RCore* core = Core()->core();
+    const char* port = "1234";
+
+    unsigned char buf[4097];
+    RSocket *ch = NULL;
+    RSocket *s;
+    int i, ret;
+    char *str;
+
+    s = r_socket_new (0);
+    r_socket_listen (s, port, NULL);
+    if (false) {
+        eprintf ("Error listening on port %s\n", port);
+        r_socket_free (s);
+        return false;
+    }
+
+    eprintf ("Listening for commands on port %s\n", port);
+    while (isRunning) {
+        ch = r_socket_accept (s);
+        buf[0] = 0;
+        ret = r_socket_read (ch, buf, sizeof (buf) - 1);
+        if (ret > 0) {
+            buf[ret] = 0;
+            for (i = 0; buf[i]; i++) {
+                if (buf[i] == '\n') {
+                    buf[i] = buf[i + 1]? ';': '\0';
+                }
+            }
+            if ((!r_config_get_i (core->config, "scr.prompt") &&
+                 !strcmp ((char *)buf, "q!")) ||
+                !strcmp ((char *)buf, ".--")) {
+                r_socket_close (ch);
+                break;
+            }
+            str = r_core_cmd_str (core, (const char *)buf);
+            if (str && *str)  {
+                r_socket_write (ch, str, strlen (str));
+            } else {
+                const char nl[] = "\n";
+                r_socket_write (ch, (void*) nl, 1);
+            }
+            free (str);
+        }
+        r_socket_close (ch);
+        r_socket_free (ch);
+        ch = NULL;
+    }
+    r_socket_free (s);
+    r_socket_free (ch);
+    eprintf ("TCP Server (on %s) exited.\n", port);
+
+    return true;
+}
+
+void CommandServer::process()
+{
+    startCommandServer();
+    emit finished();
+}
+
+/**
+ * Stops the server.
+ */
+void CommandServer::stop()
+{
+    isRunning = false;
+}

src/utils/CommandServer.h

@@ -0,0 +1,26 @@
+#ifndef COMMANDSERVER_H
+#define COMMANDSERVER_H
+
+#include <QObject>
+
+class CommandServer : public QObject
+{
+    Q_OBJECT
+public:
+    explicit CommandServer(QObject *parent = nullptr);
+    ~CommandServer();
+    void stop();
+
+signals:
+    void finished();
+    void error(QString err);
+
+public slots:
+    void process();
+
+private:
+    bool isRunning = true;
+    bool startCommandServer();
+};
+
+#endif // COMMANDSERVER_H

src/utils/JupyterConnection.cpp

@@ -2,6 +2,8 @@
 #include <QJsonDocument>
 #include <QJsonArray>
 #include <QJsonObject>
+#include <QDebug>
+#include <QThread>
 
 #include "JupyterConnection.h"
 
@@ -12,6 +14,9 @@ JupyterConnection::JupyterConnection(QObject *parent) : QObject(parent)
 
 JupyterConnection::~JupyterConnection()
 {
+    cmdServer->stop();
+    process->terminate();
+    urlProcess->terminate();
 }
 
 const char *urlPy = "from notebook import notebookapp\n"
@@ -28,23 +33,34 @@ void JupyterConnection::start()
     process = new QProcess(this);
     connect(process, &QProcess::readyReadStandardError, this, &JupyterConnection::readStandardError);
     connect(process, &QProcess::readyReadStandardOutput, this, &JupyterConnection::readStandardOutput);
+    connect(process, &QProcess::errorOccurred, this, [](QProcess::ProcessError error){ qWarning() << "Jupyter error occurred:" << error; });
     process->start("jupyter", {"notebook", "--no-browser", "-y"});
 
     urlProcess = new QProcess(this);
     connect(urlProcess, &QProcess::readyReadStandardOutput, this, &JupyterConnection::readUrlStandardOutput);
     urlProcess->start("python3", {"-c", urlPy});
+
+    QThread *cmdServerThread = new QThread(this);
+    cmdServer = new CommandServer();
+    cmdServer->moveToThread(cmdServerThread);
+    connect(cmdServer, &CommandServer::error, this, [](QString err){ qWarning() << "CmdServer error:" << err; });
+    connect(cmdServerThread, SIGNAL (started()), cmdServer, SLOT (process()));
+    connect(cmdServer, SIGNAL (finished()), cmdServerThread, SLOT (quit()));
+    connect(cmdServer, SIGNAL (finished()), cmdServer, SLOT (deleteLater()));
+    connect(cmdServerThread, SIGNAL (finished()), cmdServerThread, SLOT (deleteLater()));
+    cmdServerThread->start();
 }
 
 void JupyterConnection::readStandardError()
 {
     auto data = process->readAllStandardError();
-    printf("jupyter stderr: %s\n", data.constData());
+    printf("Jupyter stderr: %s", data.constData());
 }
 
 void JupyterConnection::readStandardOutput()
 {
     auto data = process->readAllStandardOutput();
-    printf("jupyter stdout: %s\n", data.constData());
+    printf("Jupyter stdout: %s", data.constData());
 }
 
 void JupyterConnection::readUrlStandardOutput()

src/utils/JupyterConnection.h

@@ -1,8 +1,8 @@
-
 #ifndef JUPYTERCONNECTION_H
 #define JUPYTERCONNECTION_H
 
 #include <QProcess>
+#include "CommandServer.h"
 
 class JupyterConnection : public QObject
 {
@@ -20,6 +20,7 @@ signals:
 private:
     QProcess *process;
     QProcess *urlProcess;
+    CommandServer *cmdServer;
 
 private slots:
     void readStandardError();