httpd-example.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- /home/reggie/tmp/qt-3.0-reggie-5401/qt-x11-commercial-3.0.5/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"><!--h3.fn,span.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 verysimple implementation of a HTTP daemon that listens on port 8080 andsends back a simple HTML page back for every GET request it gets. Aftersending the page, it closes the connection.<p> <hr><p> Implementation (httpd.cpp):<p> <pre>/****************************************************************************** $Id: qt/httpd.cpp 3.0.5 edited Nov 6 2001 $**** Copyright (C) 1992-2000 Trolltech AS. 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="x643"></a> connect( s, SIGNAL(<a href="qsocket.html#readyRead">readyRead</a>()), this, SLOT(readClient()) );<a name="x641"></a> connect( s, SIGNAL(<a href="qsocket.html#delayedCloseFinished">delayedCloseFinished</a>()), this, SLOT(discardClient()) );<a name="x644"></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="x639"></a> if ( socket-><a href="qsocket.html#canReadLine">canReadLine</a>() ) {<a name="x645"></a><a name="x642"></a> <a href="qstringlist.html">QStringList</a> tokens = QStringList::<a href="qstringlist.html#split">split</a>( QRegExp("[ \n\r][ \n\r]*"), socket-><a href="qsocket.html#readLine">readLine</a>() ); if ( tokens[0] == "GET" ) { <a href="qtextstream.html">QTextStream</a> os( socket );<a name="x647"></a> os.<a href="qtextstream.html#setEncoding">setEncoding</a>( QTextStream::UnicodeUTF8 ); os << "HTTP/1.0 200 Ok\n\r" "Content-Type: text/html; charset=\"utf-8\"\n\r" "\n\r" "<h1>Nothing to see here</h1>\n";<a name="x640"></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_OBJECTpublic: 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="x638"></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="x636"></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="x646"></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 © 2002 <a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a><td align=right><div align=right>Qt version 3.0.5</div></table></div></address></body></html>⌨️ 快捷键说明
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