You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
tqt3/doc/html/httpd-example.html

196 lines
7.9 KiB

<!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; }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
body { background: #ffffff; color: black; }
--></style>
</head>
<body>
<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>
| <a href="annotated.html">
<font color="#004faf">Annotated</font></a>
| <a href="groups.html">
<font color="#004faf">Grouped&nbsp;Classes</font></a>
| <a href="functions.html">
<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="ntqserversocket.html">TQServerSocket</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 TQt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include &lt;stdlib.h&gt;
#include &lt;<a href="qsocket-h.html">ntqsocket.h</a>&gt;
#include &lt;<a href="qregexp-h.html">ntqregexp.h</a>&gt;
#include &lt;<a href="qserversocket-h.html">ntqserversocket.h</a>&gt;
#include &lt;<a href="qapplication-h.html">ntqapplication.h</a>&gt;
#include &lt;<a href="qmainwindow-h.html">ntqmainwindow.h</a>&gt;
#include &lt;<a href="qtextstream-h.html">ntqtextstream.h</a>&gt;
#include &lt;<a href="qvbox-h.html">ntqvbox.h</a>&gt;
#include &lt;<a href="qlabel-h.html">ntqlabel.h</a>&gt;
#include &lt;<a href="qtextview-h.html">ntqtextview.h</a>&gt;
#include &lt;<a href="qpushbutton-h.html">ntqpushbutton.h</a>&gt;
// HttpDaemon is the the class that implements the simple HTTP server.
class HttpDaemon : public <a href="ntqserversocket.html">TQServerSocket</a>
{
<a href="metaobjects.html#TQ_OBJECT">TQ_OBJECT</a>
public:
HttpDaemon( <a href="ntqobject.html">TQObject</a>* parent=0 ) :
<a href="ntqserversocket.html">TQServerSocket</a>(8080,1,parent)
{
if ( !ok() ) {
<a href="ntqapplication.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 TQSocket and all
// communication with the client is done over this TQSocket. TQSocket
// works asynchronouslyl, this means that all the communication is done
// in the two slots readClient() and discardClient().
<a href="ntqsocket.html">TQSocket</a>* s = new <a href="ntqsocket.html">TQSocket</a>( this );
<a name="x731"></a> connect( s, SIGNAL(<a href="ntqsocket.html#readyRead">readyRead</a>()), this, SLOT(readClient()) );
<a name="x729"></a> connect( s, SIGNAL(<a href="ntqsocket.html#delayedCloseFinished">delayedCloseFinished</a>()), this, SLOT(discardClient()) );
<a name="x732"></a> s-&gt;<a href="ntqsocket.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="ntqsocket.html">TQSocket</a>* socket = (TQSocket*)sender();
<a name="x727"></a> if ( socket-&gt;<a href="ntqsocket.html#canReadLine">canReadLine</a>() ) {
<a name="x733"></a><a name="x730"></a> <a href="ntqstringlist.html">TQStringList</a> tokens = TQStringList::<a href="ntqstringlist.html#split">split</a>( TQRegExp("[ \r\n][ \r\n]*"), socket-&gt;<a href="ntqsocket.html#readLine">readLine</a>() );
if ( tokens[0] == "GET" ) {
<a href="ntqtextstream.html">TQTextStream</a> os( socket );
<a name="x735"></a> os.<a href="ntqtextstream.html#setEncoding">setEncoding</a>( TQTextStream::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="ntqsocket.html#close">close</a>();
emit wroteToClient();
}
}
}
void discardClient()
{
<a href="ntqsocket.html">TQSocket</a>* socket = (TQSocket*)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="ntqvbox.html">TQVBox</a>
{
TQ_OBJECT
public:
HttpInfo()
{
HttpDaemon *httpd = new HttpDaemon( this );
<a href="ntqstring.html">TQString</a> itext = TQString(
"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="ntqserversocket.html#port">port</a>() );
<a href="ntqlabel.html">TQLabel</a> *lb = new <a href="ntqlabel.html">TQLabel</a>( itext, this );
lb-&gt;<a href="ntqlabel.html#setAlignment">setAlignment</a>( AlignHCenter );
infoText = new <a href="ntqtextview.html">TQTextView</a>( this );
<a href="ntqpushbutton.html">TQPushButton</a> *quit = new <a href="ntqpushbutton.html">TQPushButton</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="ntqbutton.html#pressed">pressed</a>()), tqApp, SLOT(<a href="ntqapplication.html#quit">quit</a>()) );
}
~HttpInfo()
{
}
private slots:
void newConnect()
{
<a name="x734"></a> infoText-&gt;<a href="ntqtextedit.html#append">append</a>( "New connection" );
}
void endConnect()
{
infoText-&gt;<a href="ntqtextedit.html#append">append</a>( "Connection closed\n\n" );
}
void wroteToClient()
{
infoText-&gt;<a href="ntqtextedit.html#append">append</a>( "Wrote to client" );
}
private:
<a href="ntqtextview.html">TQTextView</a> *infoText;
};
int main( int argc, char** argv )
{
<a href="ntqapplication.html">TQApplication</a> app( argc, argv );
HttpInfo info;
app.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( &amp;info );
info.<a href="ntqwidget.html#show">show</a>();
return app.<a href="ntqapplication.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>TQt 3.3.8</div>
</table></div></address></body>
</html>