Refactor Connection

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     capybara-webkit (0.7.2)
-      capybara (>= 1.0.0, < 1.2)
+      capybara (< 1.2, >= 1.0.0)
 
 GEM
   remote: http://rubygems.org/
@@ -39,7 +39,7 @@ GEM
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.6.0)
     rubyzip (0.9.4)
-    selenium-webdriver (2.8.0)
+    selenium-webdriver (2.7.0)
       childprocess (>= 0.2.1)
       ffi (>= 1.0.7)
       json_pure

src/CommandFactory.cpp

@@ -0,0 +1,28 @@
+#include "CommandFactory.h"
+#include "Visit.h"
+#include "Find.h"
+#include "Command.h"
+#include "Reset.h"
+#include "Node.h"
+#include "Url.h"
+#include "Source.h"
+#include "Evaluate.h"
+#include "Execute.h"
+#include "FrameFocus.h"
+#include "Header.h"
+#include "Render.h"
+#include "Body.h"
+#include "Status.h"
+#include "Headers.h"
+#include "SetCookie.h"
+#include "ClearCookies.h"
+#include "GetCookies.h"
+
+CommandFactory::CommandFactory(WebPage *page, QObject *parent) : QObject(parent) {
+  m_page = page;
+}
+
+Command *CommandFactory::createCommand(const char *name) {
+  #include "find_command.h"
+  return NULL;
+}

src/CommandFactory.h

@@ -0,0 +1,16 @@
+#include <QObject>
+
+class Command;
+class WebPage;
+
+class CommandFactory : public QObject {
+  Q_OBJECT
+
+  public:
+    CommandFactory(WebPage *page, QObject *parent = 0);
+    Command *createCommand(const char *name);
+
+  private:
+    WebPage *m_page;
+};
+

src/CommandParser.cpp

@@ -0,0 +1,68 @@
+#include "CommandParser.h"
+
+#include <QIODevice>
+
+CommandParser::CommandParser(QIODevice *device, QObject *parent) :
+    QObject(parent) {
+  m_device = device;
+  m_expectingDataSize = -1;
+  connect(m_device, SIGNAL(readyRead()), this, SLOT(checkNext()));
+}
+
+void CommandParser::checkNext() {
+  if (m_expectingDataSize == -1) {
+    if (m_device->canReadLine()) {
+      readLine();
+      checkNext();
+    }
+  } else {
+    if (m_device->bytesAvailable() >= m_expectingDataSize) {
+      readDataBlock();
+      checkNext();
+    }
+  }
+}
+
+void CommandParser::readLine() {
+  char buffer[128];
+  qint64 lineLength = m_device->readLine(buffer, 128);
+  if (lineLength != -1) {
+    buffer[lineLength - 1] = 0;
+    processNext(buffer);
+  }
+}
+
+void CommandParser::readDataBlock() {
+  char *buffer = new char[m_expectingDataSize + 1];
+  m_device->read(buffer, m_expectingDataSize);
+  buffer[m_expectingDataSize] = 0;
+  processNext(buffer);
+  m_expectingDataSize = -1;
+  delete[] buffer;
+}
+
+void CommandParser::processNext(const char *data) {
+  if (m_commandName.isNull()) {
+    m_commandName = data;
+    m_argumentsExpected = -1;
+  } else {
+    processArgument(data);
+  }
+}
+
+void CommandParser::processArgument(const char *data) {
+  if (m_argumentsExpected == -1) {
+    m_argumentsExpected = QString(data).toInt();
+  } else if (m_expectingDataSize == -1) {
+    m_expectingDataSize = QString(data).toInt();
+  } else {
+    m_arguments.append(QString::fromUtf8(data));
+  }
+
+  if (m_arguments.length() == m_argumentsExpected) {
+    emit commandReady(m_commandName, m_arguments);
+    m_commandName = QString();
+    m_arguments.clear();
+    m_argumentsExpected = -1;
+  }
+}

src/CommandParser.h

@@ -0,0 +1,29 @@
+#include <QObject>
+#include <QStringList>
+
+class QIODevice;
+
+class CommandParser : public QObject {
+  Q_OBJECT
+
+  public:
+    CommandParser(QIODevice *device, QObject *parent = 0);
+
+  public slots:
+    void checkNext();
+
+  signals:
+    void commandReady(QString commandName, QStringList arguments);
+
+  private:
+    void readLine();
+    void readDataBlock();
+    void processNext(const char *line);
+    void processArgument(const char *data);
+    QIODevice *m_device;
+    QString m_commandName;
+    QStringList m_arguments;
+    int m_argumentsExpected;
+    int m_expectingDataSize;
+};
+

src/Connection.cpp

@@ -1,24 +1,9 @@
 #include "Connection.h"
 #include "WebPage.h"
 #include "UnsupportedContentHandler.h"
-#include "Visit.h"
-#include "Find.h"
+#include "CommandParser.h"
+#include "CommandFactory.h"
 #include "Command.h"
-#include "Reset.h"
-#include "Node.h"
-#include "Url.h"
-#include "Source.h"
-#include "Evaluate.h"
-#include "Execute.h"
-#include "FrameFocus.h"
-#include "Header.h"
-#include "Render.h"
-#include "Body.h"
-#include "Status.h"
-#include "Headers.h"
-#include "SetCookie.h"
-#include "ClearCookies.h"
-#include "GetCookies.h"
 
 #include <QTcpSocket>
 #include <iostream>
@@ -27,76 +12,31 @@ Connection::Connection(QTcpSocket *socket, WebPage *page, QObject *parent) :
     QObject(parent) {
   m_socket = socket;
   m_page = page;
+  m_commandParser = new CommandParser(socket, this);
+  m_commandFactory = new CommandFactory(page, this);
   m_command = NULL;
-  m_expectingDataSize = -1;
   m_pageSuccess = true;
   m_commandWaiting = false;
-  connect(m_socket, SIGNAL(readyRead()), this, SLOT(checkNext()));
+  connect(m_socket, SIGNAL(readyRead()), m_commandParser, SLOT(checkNext()));
+  connect(m_commandParser, SIGNAL(commandReady(QString, QStringList)), this, SLOT(commandReady(QString, QStringList)));
   connect(m_page, SIGNAL(pageFinished(bool)), this, SLOT(pendingLoadFinished(bool)));
 }
 
-void Connection::checkNext() {
-  if (m_expectingDataSize == -1) {
-    if (m_socket->canReadLine()) {
-      readLine();
-      checkNext();
-    }
-  } else {
-    if (m_socket->bytesAvailable() >= m_expectingDataSize) {
-      readDataBlock();
-      checkNext();
-    }
-  }
-}
 
-void Connection::readLine() {
-  char buffer[128];
-  qint64 lineLength = m_socket->readLine(buffer, 128);
-  if (lineLength != -1) {
-    buffer[lineLength - 1] = 0;
-    processNext(buffer);
-  }
-}
+void Connection::commandReady(QString commandName, QStringList arguments) {
+  m_commandName = commandName;
+  m_arguments = arguments;
 
-void Connection::readDataBlock() {
-  char *buffer = new char[m_expectingDataSize + 1];
-  m_socket->read(buffer, m_expectingDataSize);
-  buffer[m_expectingDataSize] = 0;
-  processNext(buffer);
-  m_expectingDataSize = -1;
-  delete[] buffer;
-}
-
-void Connection::processNext(const char *data) {
-  if (m_commandName.isNull()) {
-    m_commandName = data;
-    m_argumentsExpected = -1;
-  } else {
-    processArgument(data);
-  }
-}
-
-void Connection::processArgument(const char *data) {
-  if (m_argumentsExpected == -1) {
-    m_argumentsExpected = QString(data).toInt();
-  } else if (m_expectingDataSize == -1) {
-    m_expectingDataSize = QString(data).toInt();
-  } else {
-    m_arguments.append(QString::fromUtf8(data));
-  }
-
-  if (m_arguments.length() == m_argumentsExpected) {
-    if (m_page->isLoading())
-      m_commandWaiting = true;
-    else
-      startCommand();
-  }
+  if (m_page->isLoading())
+    m_commandWaiting = true;
+  else
+    startCommand();
 }
 
 void Connection::startCommand() {
   m_commandWaiting = false;
   if (m_pageSuccess) {
-    m_command = createCommand(m_commandName.toAscii().constData());
+    m_command = m_commandFactory->createCommand(m_commandName.toAscii().constData());
     if (m_command) {
       connect(m_command,
               SIGNAL(finished(Response *)),
@@ -115,11 +55,6 @@ void Connection::startCommand() {
   }
 }
 
-Command *Connection::createCommand(const char *name) {
-  #include "find_command.h"
-  return NULL;
-}
-
 void Connection::pendingLoadFinished(bool success) {
   m_pageSuccess = success;
   if (m_commandWaiting)
@@ -143,9 +78,5 @@ void Connection::writeResponse(Response *response) {
   m_socket->write(messageLength.toAscii());
   m_socket->write(messageUtf8);
   delete response;
-
-  m_arguments.clear();
-  m_commandName = QString();
-  m_argumentsExpected = -1;
 }
 

src/Connection.h

@@ -5,6 +5,8 @@ class QTcpSocket;
 class WebPage;
 class Command;
 class Response;
+class CommandParser;
+class CommandFactory;
 
 class Connection : public QObject {
   Q_OBJECT
@@ -13,16 +15,11 @@ class Connection : public QObject {
     Connection(QTcpSocket *socket, WebPage *page, QObject *parent = 0);
 
   public slots:
-    void checkNext();
+    void commandReady(QString commandName, QStringList arguments);
     void finishCommand(Response *response);
     void pendingLoadFinished(bool success);
 
   private:
-    void readLine();
-    void readDataBlock();
-    void processNext(const char *line);
-    Command *createCommand(const char *name);
-    void processArgument(const char *line);
     void startCommand();
     void writeResponse(Response *response);
 
@@ -30,9 +27,9 @@ class Connection : public QObject {
     QString m_commandName;
     Command *m_command;
     QStringList m_arguments;
-    int m_argumentsExpected;
     WebPage *m_page;
-    int m_expectingDataSize;
+    CommandParser *m_commandParser;
+    CommandFactory *m_commandFactory;
     bool m_pageSuccess;
     bool m_commandWaiting;
 };

src/webkit_server.pro

@@ -28,6 +28,8 @@ HEADERS = \
   SetCookie.h \
   ClearCookies.h \
   GetCookies.h \
+  CommandParser.h \
+  CommandFactory.h \
 
 SOURCES = \
   main.cpp \
@@ -57,6 +59,8 @@ SOURCES = \
   SetCookie.cpp \
   ClearCookies.cpp \
   GetCookies.cpp \
+  CommandParser.cpp \
+  CommandFactory.cpp \
 
 RESOURCES = webkit_server.qrc
 QT += network webkit