/usr/share/qt5/doc/qtwebchannel/qtwebchannel-chatserver-cpp-example.html is in qtwebchannel5-doc-html 5.9.5-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- chatserver-cpp.qdoc -->
<title>Qt WebChannel ChatServer Example | Qt WebChannel 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qtwebchannel-index.html">Qt WebChannel</a></td><td ><a href="qtwebchannel-examples.html">Qt WebChannel Examples</a></td><td >Qt WebChannel ChatServer Example</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#running-the-example">Running the Example</a></li>
<li class="level1"><a href="#implementing-a-chat-server">Implementing a Chat Server</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">Qt WebChannel ChatServer Example</h1>
<span class="subtitle"></span>
<!-- $$$chatserver-cpp-description -->
<div class="descr"> <a name="details"></a>
<p class="centerAlign"><img src="images/chatserver-cpp.png" alt="" /></p><p><i>ChatServer</i> provides a chat service that the <a href="qtwebchannel-chatclient-qml-example.html">Qt WebChannel ChatClient QML Example</a> and <a href="qtwebchannel-chatclient-html-example.html">Qt WebChannel ChatClient HTML Example</a> can connect to.</p>
<a name="running-the-example"></a>
<h2 id="running-the-example">Running the Example</h2>
<p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p>
<a name="implementing-a-chat-server"></a>
<h2 id="implementing-a-chat-server">Implementing a Chat Server</h2>
<p>The C++ application implements a QObject which provides all mechanisms required for a chat service. This object is published through a <a href="qwebchannel.html">QWebChannel</a> which uses a WebSocket as transport.</p>
<p>The server provides a basic <code>login</code> method (username only, no passwords), which must be successfully invoked before a client is able to chat. After login, a client can invoke the method <code>sendMessage</code> and receive the signal <code>newMessage</code> to write and receive messages. Furthermore, there is a <code>userList</code> property which provides the names of all other connected clients. Additionally the server sends a <code>keepAlive</code> signal periodically to all clients. The clients have to respond to this signal, otherwise the client will be removed from the <code>userList</code> property.</p>
<p>The example shows how basic QObject elements can be used with <a href="qwebchannel.html">QWebChannel</a>, that is signals (<code>newMessage</code>), slots (<code>sendMessage</code>), and properties (<code>userList</code>).</p>
<p>Because this is a plain server application, separate clients are needed to interact with it. <a href="qtwebchannel-chatclient-qml-example.html">Qt WebChannel ChatClient QML Example</a> and <a href="qtwebchannel-chatclient-html-example.html">Qt WebChannel ChatClient HTML Example</a> are client implementations compatible with this server.</p>
<p>Files:</p>
<ul>
<li><a href="qtwebchannel-chatserver-cpp-chatserver-cpp.html">chatserver-cpp/chatserver.cpp</a></li>
<li><a href="qtwebchannel-chatserver-cpp-chatserver-h.html">chatserver-cpp/chatserver.h</a></li>
<li><a href="qtwebchannel-chatserver-cpp-main-cpp.html">chatserver-cpp/main.cpp</a></li>
<li><a href="qtwebchannel-chatserver-cpp-chatserver-cpp-pro.html">chatserver-cpp/chatserver-cpp.pro</a></li>
</ul>
</div>
<!-- @@@chatserver-cpp -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
|