Completely reorganized the source code layout.

src/qobjecthandler.cpp

@@ -0,0 +1,103 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Nathan Osman
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonParseError>
+#include <QMetaMethod>
+#include <QMetaObject>
+#include <QMetaType>
+#include <QVariantMap>
+
+#include "qobjecthandler.h"
+#include "qobjecthandler_p.h"
+
+QObjectHandlerPrivate::QObjectHandlerPrivate(QObjectHandler *handler)
+    : QObject(handler),
+      q(handler)
+{
+}
+
+void QObjectHandlerPrivate::onReadChannelFinished()
+{
+    // Obtain the pointer to the socket emitting the signal
+    QHttpSocket *socket = qobject_cast<QHttpSocket*>(sender());
+
+    // Obtain the index and remove it from the map
+    int index = map.take(socket);
+
+    // Attempt to decode the JSON from the socket
+    QJsonParseError error;
+    QJsonDocument document = QJsonDocument::fromJson(socket->readAll(), &error);
+
+    // TODO: check document.isObject()
+    // TODO: check "error" variable for a problem
+
+    // Invoke the slot
+    QVariantMap retVal;
+    q->metaObject()->method(index).invoke(q,
+        Q_RETURN_ARG(QVariantMap, retVal),
+        Q_ARG(QVariantMap, document.object().toVariantMap()));
+
+    // Convert the return value to JSON and write it to the socket
+    QByteArray data = QJsonDocument(QJsonObject::fromVariantMap(retVal)).toJson();
+    socket->setHeader("Content-Length", QByteArray::number(data.length()));
+    socket->setHeader("Content-Type", "application/json");
+    socket->write(data);
+
+    // Close the socket and delete it
+    socket->close();
+    socket->deleteLater();
+}
+
+QObjectHandler::QObjectHandler(QObject *parent)
+    : QHttpHandler(parent),
+      d(new QObjectHandlerPrivate(this))
+{
+}
+
+bool QObjectHandler::process(QHttpSocket *socket, const QString &path)
+{
+    // Determine the index of the slot with the specified name - note that we
+    // don't need to worry about retrieving the index for deleteLater() since
+    // we specify the "QVariantMap" parameter type, which no parent slots use
+    int index = metaObject()->indexOfSlot(QString("%1(QVariantMap)").arg(path).toUtf8().data());
+
+    // Ensure that the index is valid
+    if(index == -1) {
+        return false;
+    }
+
+    // Ensure that the return type is correct
+    QMetaMethod method = metaObject()->method(index);
+    if(method.returnType() != QMetaType::QVariantMap) {
+        return false;
+    }
+
+    // Add the socket to the map
+    d->map.insert(socket, index);
+    connect(socket, SIGNAL(readChannelFinished()), d, SLOT(onReadChannelFinished()));
+
+    return true;
+}