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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/network/httpd/httpd.doc:5 -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>A simple HTTP daemon</title>
+<style type="text/css"><!--
+fn { margin-left: 1cm; text-indent: -1cm; }
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+
+<table border="0" cellpadding="0" cellspacing="0" width="100%">
+<tr bgcolor="#E5E5E5">
+<td valign=center>
+ <a href="index.html">
+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
+ | <a href="mainclasses.html">
+<font color="#004faf">Main&nbsp;Classes</font></a>
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+<font color="#004faf">Annotated</font></a>
+ | <a href="groups.html">
+<font color="#004faf">Grouped&nbsp;Classes</font></a>
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+<font color="#004faf">Functions</font></a>
+</td>
+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>A simple HTTP daemon</h1>
+
+
+<p>
+<p> This example shows how to use the <a href="qserversocket.html">QServerSocket</a> class. It is a very
+simple implementation of a HTTP daemon that listens on port 8080 and
+sends back a simple HTML page back for every GET request it gets. After
+sending the page, it closes the connection.
+<p> <hr>
+<p> Implementation (httpd.cpp):
+<p> <pre>/****************************************************************************
+** $Id: qt/httpd.cpp 3.3.8 edited Jan 11 14:37 $
+**
+** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for Qt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+#include &lt;stdlib.h&gt;
+#include &lt;<a href="qsocket-h.html">qsocket.h</a>&gt;
+#include &lt;<a href="qregexp-h.html">qregexp.h</a>&gt;
+#include &lt;<a href="qserversocket-h.html">qserversocket.h</a>&gt;
+#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+#include &lt;<a href="qmainwindow-h.html">qmainwindow.h</a>&gt;
+#include &lt;<a href="qtextstream-h.html">qtextstream.h</a>&gt;
+#include &lt;<a href="qvbox-h.html">qvbox.h</a>&gt;
+#include &lt;<a href="qlabel-h.html">qlabel.h</a>&gt;
+#include &lt;<a href="qtextview-h.html">qtextview.h</a>&gt;
+#include &lt;<a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
+
+// HttpDaemon is the the class that implements the simple HTTP server.
+class HttpDaemon : public <a href="qserversocket.html">QServerSocket</a>
+{
+ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
+public:
+ HttpDaemon( <a href="qobject.html">QObject</a>* parent=0 ) :
+ <a href="qserversocket.html">QServerSocket</a>(8080,1,parent)
+ {
+ if ( !ok() ) {
+ <a href="qapplication.html#qWarning">qWarning</a>("Failed to bind to port 8080");
+ exit( 1 );
+ }
+ }
+
+ void newConnection( int socket )
+ {
+ // When a new client connects, the server constructs a QSocket and all
+ // communication with the client is done over this QSocket. QSocket
+ // works asynchronouslyl, this means that all the communication is done
+ // in the two slots readClient() and discardClient().
+ <a href="qsocket.html">QSocket</a>* s = new <a href="qsocket.html">QSocket</a>( this );
+<a name="x731"></a> connect( s, SIGNAL(<a href="qsocket.html#readyRead">readyRead</a>()), this, SLOT(readClient()) );
+<a name="x729"></a> connect( s, SIGNAL(<a href="qsocket.html#delayedCloseFinished">delayedCloseFinished</a>()), this, SLOT(discardClient()) );
+<a name="x732"></a> s-&gt;<a href="qsocket.html#setSocket">setSocket</a>( socket );
+ emit newConnect();
+ }
+
+signals:
+ void newConnect();
+ void endConnect();
+ void wroteToClient();
+
+private slots:
+ void readClient()
+ {
+ // This slot is called when the client sent data to the server. The
+ // server looks if it was a get request and sends a very simple HTML
+ // document back.
+ <a href="qsocket.html">QSocket</a>* socket = (QSocket*)sender();
+<a name="x727"></a> if ( socket-&gt;<a href="qsocket.html#canReadLine">canReadLine</a>() ) {
+<a name="x733"></a><a name="x730"></a> <a href="qstringlist.html">QStringList</a> tokens = QStringList::<a href="qstringlist.html#split">split</a>( QRegExp("[ \r\n][ \r\n]*"), socket-&gt;<a href="qsocket.html#readLine">readLine</a>() );
+ if ( tokens[0] == "GET" ) {
+ <a href="qtextstream.html">QTextStream</a> os( socket );
+<a name="x735"></a> os.<a href="qtextstream.html#setEncoding">setEncoding</a>( QTextStream::UnicodeUTF8 );
+ os &lt;&lt; "HTTP/1.0 200 Ok\r\n"
+ "Content-Type: text/html; charset=\"utf-8\"\r\n"
+ "\r\n"
+ "&lt;h1&gt;Nothing to see here&lt;/h1&gt;\n";
+<a name="x728"></a> socket-&gt;<a href="qsocket.html#close">close</a>();
+ emit wroteToClient();
+ }
+ }
+ }
+ void discardClient()
+ {
+ <a href="qsocket.html">QSocket</a>* socket = (QSocket*)sender();
+ delete socket;
+ emit endConnect();
+ }
+};
+
+
+// HttpInfo provides a simple graphical user interface to the server and shows
+// the actions of the server.
+class HttpInfo : public <a href="qvbox.html">QVBox</a>
+{
+ Q_OBJECT
+public:
+ HttpInfo()
+ {
+ HttpDaemon *httpd = new HttpDaemon( this );
+
+ <a href="qstring.html">QString</a> itext = QString(
+ "This is a small httpd example.\n"
+ "You can connect with your\n"
+ "web browser to port %1"
+<a name="x726"></a> ).arg( httpd-&gt;<a href="qserversocket.html#port">port</a>() );
+ <a href="qlabel.html">QLabel</a> *lb = new <a href="qlabel.html">QLabel</a>( itext, this );
+ lb-&gt;<a href="qlabel.html#setAlignment">setAlignment</a>( AlignHCenter );
+ infoText = new <a href="qtextview.html">QTextView</a>( this );
+ <a href="qpushbutton.html">QPushButton</a> *quit = new <a href="qpushbutton.html">QPushButton</a>( "quit" , this );
+
+ connect( httpd, SIGNAL(newConnect()), SLOT(newConnect()) );
+ connect( httpd, SIGNAL(endConnect()), SLOT(endConnect()) );
+ connect( httpd, SIGNAL(wroteToClient()), SLOT(wroteToClient()) );
+<a name="x724"></a> connect( quit, SIGNAL(<a href="qbutton.html#pressed">pressed</a>()), qApp, SLOT(<a href="qapplication.html#quit">quit</a>()) );
+ }
+
+ ~HttpInfo()
+ {
+ }
+
+private slots:
+ void newConnect()
+ {
+<a name="x734"></a> infoText-&gt;<a href="qtextedit.html#append">append</a>( "New connection" );
+ }
+ void endConnect()
+ {
+ infoText-&gt;<a href="qtextedit.html#append">append</a>( "Connection closed\n\n" );
+ }
+ void wroteToClient()
+ {
+ infoText-&gt;<a href="qtextedit.html#append">append</a>( "Wrote to client" );
+ }
+
+private:
+ <a href="qtextview.html">QTextView</a> *infoText;
+};
+
+
+int main( int argc, char** argv )
+{
+ <a href="qapplication.html">QApplication</a> app( argc, argv );
+ HttpInfo info;
+ app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( &amp;info );
+ info.<a href="qwidget.html#show">show</a>();
+ return app.<a href="qapplication.html#exec">exec</a>();
+}
+
+#include "httpd.moc"
+</pre>
+
+<p>See also <a href="network-examples.html">Network Examples</a>.
+
+<!-- eof -->
+<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>Qt 3.3.8</div>
+</table></div></address></body>
+</html>