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3** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
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6** This file is part of the QtWebChannel module of the Qt Toolkit.
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50
51#include "websockettransport.h"
52
53#include <QDebug>
54#include <QJsonDocument>
55#include <QJsonObject>
56#include <QWebSocket>
57
58/*!
59 \brief QWebChannelAbstractSocket implementation that uses a QWebSocket internally.
60
61 The transport delegates all messages received over the QWebSocket over its
62 textMessageReceived signal. Analogously, all calls to sendTextMessage will
63 be send over the QWebSocket to the remote client.
64*/
65
66/*!
67 Construct the transport object and wrap the given socket.
68
69 The socket is also set as the parent of the transport object.
70*/
71WebSocketTransport::WebSocketTransport(QWebSocket *socket)
72: QWebChannelAbstractTransport(socket)
73, m_socket(socket)
74{
75 connect(sender: socket, signal: &QWebSocket::textMessageReceived,
76 receiver: this, slot: &WebSocketTransport::textMessageReceived);
77 connect(sender: socket, signal: &QWebSocket::disconnected,
78 receiver: this, slot: &WebSocketTransport::deleteLater);
79}
80
81/*!
82 Destroys the WebSocketTransport.
83*/
84WebSocketTransport::~WebSocketTransport()
85{
86 m_socket->deleteLater();
87}
88
89/*!
90 Serialize the JSON message and send it as a text message via the WebSocket to the client.
91*/
92void WebSocketTransport::sendMessage(const QJsonObject &message)
93{
94 QJsonDocument doc(message);
95 m_socket->sendTextMessage(message: QString::fromUtf8(str: doc.toJson(format: QJsonDocument::Compact)));
96}
97
98/*!
99 Deserialize the stringified JSON messageData and emit messageReceived.
100*/
101void WebSocketTransport::textMessageReceived(const QString &messageData)
102{
103 QJsonParseError error;
104 QJsonDocument message = QJsonDocument::fromJson(json: messageData.toUtf8(), error: &error);
105 if (error.error) {
106 qWarning() << "Failed to parse text message as JSON object:" << messageData
107 << "Error is:" << error.errorString();
108 return;
109 } else if (!message.isObject()) {
110 qWarning() << "Received JSON message that is not an object: " << messageData;
111 return;
112 }
113 emit messageReceived(message: message.object(), transport: this);
114}
115

source code of qtwebchannel/examples/webchannel/shared/websockettransport.cpp