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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/httpd-example.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
Diffstat (limited to 'doc/html/httpd-example.html')
| -rw-r--r-- | doc/html/httpd-example.html | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/doc/html/httpd-example.html b/doc/html/httpd-example.html new file mode 100644 index 0000000..e056b15 --- /dev/null +++ b/doc/html/httpd-example.html @@ -0,0 +1,195 @@ +<!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 Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped 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="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 <stdlib.h> +#include <<a href="qsocket-h.html">qsocket.h</a>> +#include <<a href="qregexp-h.html">qregexp.h</a>> +#include <<a href="qserversocket-h.html">qserversocket.h</a>> +#include <<a href="qapplication-h.html">qapplication.h</a>> +#include <<a href="qmainwindow-h.html">qmainwindow.h</a>> +#include <<a href="qtextstream-h.html">qtextstream.h</a>> +#include <<a href="qvbox-h.html">qvbox.h</a>> +#include <<a href="qlabel-h.html">qlabel.h</a>> +#include <<a href="qtextview-h.html">qtextview.h</a>> +#include <<a href="qpushbutton-h.html">qpushbutton.h</a>> + +// 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-><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-><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-><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 << "HTTP/1.0 200 Ok\r\n" + "Content-Type: text/html; charset=\"utf-8\"\r\n" + "\r\n" + "<h1>Nothing to see here</h1>\n"; +<a name="x728"></a> socket-><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-><a href="qserversocket.html#port">port</a>() ); + <a href="qlabel.html">QLabel</a> *lb = new <a href="qlabel.html">QLabel</a>( itext, this ); + lb-><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-><a href="qtextedit.html#append">append</a>( "New connection" ); + } + void endConnect() + { + infoText-><a href="qtextedit.html#append">append</a>( "Connection closed\n\n" ); + } + void wroteToClient() + { + infoText-><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>( &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 © 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> |