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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
commitbd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch)
tree7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/mail-example.html
downloadqt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz
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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/mail/mail.doc:5 -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>A simple mail client</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 mail client</h1>
+
+
+<p>
+<p> This example shows how to use the <a href="qsocket.html">QSocket</a> class. The client can only be
+used to send mails. The interesting part is the implementation of the
+SMTP protocol.
+<p> <hr>
+<p> Header file (smtp.h):
+<p> <pre>/****************************************************************************
+** $Id: qt/smtp.h 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.
+**
+*****************************************************************************/
+
+#ifndef SMTP_H
+#define SMTP_H
+
+#include &lt;<a href="qobject-h.html">qobject.h</a>&gt;
+#include &lt;<a href="qstring-h.html">qstring.h</a>&gt;
+
+class QSocket;
+class QTextStream;
+class QDns;
+
+class Smtp : public <a href="qobject.html">QObject</a>
+{
+ <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
+
+public:
+ Smtp( const <a href="qstring.html">QString</a> &amp;from, const <a href="qstring.html">QString</a> &amp;to,
+ const <a href="qstring.html">QString</a> &amp;subject, const <a href="qstring.html">QString</a> &amp;body );
+ ~Smtp();
+
+signals:
+ void status( const <a href="qstring.html">QString</a> &amp; );
+
+private slots:
+ void dnsLookupHelper();
+ void readyRead();
+ void connected();
+
+private:
+ enum State {
+ Init,
+ Mail,
+ Rcpt,
+ Data,
+ Body,
+ Quit,
+ Close
+ };
+
+ <a href="qstring.html">QString</a> message;
+ <a href="qstring.html">QString</a> from;
+ <a href="qstring.html">QString</a> rcpt;
+ <a href="qsocket.html">QSocket</a> *socket;
+ <a href="qtextstream.html">QTextStream</a> * t;
+ int state;
+ <a href="qstring.html">QString</a> response;
+ <a href="qdns.html">QDns</a> * mxLookup;
+};
+
+#endif
+</pre>
+
+<p> <hr>
+<p> Implementation (smtp.cpp):
+<p> <pre>/****************************************************************************
+** $Id: qt/smtp.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 "smtp.h"
+
+#include &lt;<a href="qtextstream-h.html">qtextstream.h</a>&gt;
+#include &lt;<a href="qsocket-h.html">qsocket.h</a>&gt;
+#include &lt;<a href="qdns-h.html">qdns.h</a>&gt;
+#include &lt;<a href="qtimer-h.html">qtimer.h</a>&gt;
+#include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+#include &lt;<a href="qmessagebox-h.html">qmessagebox.h</a>&gt;
+#include &lt;<a href="qregexp-h.html">qregexp.h</a>&gt;
+
+
+<a name="f297"></a>Smtp::Smtp( const <a href="qstring.html">QString</a> &amp;from, const <a href="qstring.html">QString</a> &amp;to,
+ const <a href="qstring.html">QString</a> &amp;subject,
+ const <a href="qstring.html">QString</a> &amp;body )
+{
+ socket = new <a href="qsocket.html">QSocket</a>( this );
+<a name="x714"></a> <a href="qobject.html#connect">connect</a> ( socket, SIGNAL( <a href="qsocket.html#readyRead">readyRead</a>() ),
+ this, SLOT( readyRead() ) );
+<a name="x711"></a> <a href="qobject.html#connect">connect</a> ( socket, SIGNAL( <a href="qsocket.html#connected">connected</a>() ),
+ this, SLOT( connected() ) );
+
+<a name="x717"></a><a name="x715"></a> mxLookup = new <a href="qdns.html">QDns</a>( to.<a href="qstring.html#mid">mid</a>( to.<a href="qstring.html#find">find</a>( '@' )+1 ), QDns::Mx );
+<a name="x707"></a> <a href="qobject.html#connect">connect</a>( mxLookup, SIGNAL(<a href="qdns.html#resultsReady">resultsReady</a>()),
+ this, SLOT(dnsLookupHelper()) );
+
+<a name="x716"></a> message = QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "From: " ) + from +
+ QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\nTo: " ) + to +
+ QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\nSubject: " ) + subject +
+ QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\n\n" ) + body + "\n";
+ message.replace( QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\n" ),
+ QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\r\n" ) );
+ message.replace( QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\r\n.\r\n" ),
+ QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\r\n..\r\n" ) );
+
+ this-&gt;from = from;
+ rcpt = to;
+
+ state = Init;
+}
+
+
+Smtp::~Smtp()
+{
+ delete t;
+ delete socket;
+}
+
+
+void <a name="f298"></a>Smtp::dnsLookupHelper()
+{
+<a name="x706"></a> <a href="qvaluelist.html">QValueList</a>&lt;QDns::MailServer&gt; s = mxLookup-&gt;<a href="qdns.html#mailServers">mailServers</a>();
+<a name="x720"></a> if ( s.<a href="qvaluelist.html#isEmpty">isEmpty</a>() ) {
+<a name="x705"></a> if ( !mxLookup-&gt;<a href="qdns.html#isWorking">isWorking</a>() )
+ emit status( <a href="qobject.html#tr">tr</a>( "Error in MX record lookup" ) );
+ return;
+ }
+
+<a name="x719"></a> emit status( <a href="qobject.html#tr">tr</a>( "Connecting to %1" ).arg( s.<a href="qvaluelist.html#first">first</a>().name ) );
+
+<a name="x710"></a> socket-&gt;<a href="qsocket.html#connectToHost">connectToHost</a>( s.<a href="qvaluelist.html#first">first</a>().name, 25 );
+ t = new <a href="qtextstream.html">QTextStream</a>( socket );
+}
+
+
+void <a name="f299"></a>Smtp::connected()
+{
+<a name="x712"></a> emit status( <a href="qobject.html#tr">tr</a>( "Connected to %1" ).arg( socket-&gt;<a href="qsocket.html#peerName">peerName</a>() ) );
+}
+
+void <a name="f300"></a>Smtp::readyRead()
+{
+ // SMTP is line-oriented
+<a name="x709"></a> if ( !socket-&gt;<a href="qsocket.html#canReadLine">canReadLine</a>() )
+ return;
+
+ <a href="qstring.html">QString</a> responseLine;
+ do {
+<a name="x713"></a> responseLine = socket-&gt;<a href="qsocket.html#readLine">readLine</a>();
+ response += responseLine;
+ } while( socket-&gt;<a href="qsocket.html#canReadLine">canReadLine</a>() &amp;&amp; responseLine[3] != ' ' );
+<a name="x718"></a> responseLine.<a href="qstring.html#truncate">truncate</a>( 3 );
+
+ if ( state == Init &amp;&amp; responseLine[0] == '2' ) {
+ // banner was okay, let's go on
+ *t &lt;&lt; "HELO there\r\n";
+ state = Mail;
+ } else if ( state == Mail &amp;&amp; responseLine[0] == '2' ) {
+ // HELO response was okay (well, it has to be)
+ *t &lt;&lt; "MAIL FROM: &lt;" &lt;&lt; from &lt;&lt; "&gt;\r\n";
+ state = Rcpt;
+ } else if ( state == Rcpt &amp;&amp; responseLine[0] == '2' ) {
+ *t &lt;&lt; "RCPT TO: &lt;" &lt;&lt; rcpt &lt;&lt; "&gt;\r\n";
+ state = Data;
+ } else if ( state == Data &amp;&amp; responseLine[0] == '2' ) {
+ *t &lt;&lt; "DATA\r\n";
+ state = Body;
+ } else if ( state == Body &amp;&amp; responseLine[0] == '3' ) {
+ *t &lt;&lt; message &lt;&lt; ".\r\n";
+ state = Quit;
+ } else if ( state == Quit &amp;&amp; responseLine[0] == '2' ) {
+ *t &lt;&lt; "QUIT\r\n";
+ // here, we just close.
+ state = Close;
+ emit status( <a href="qobject.html#tr">tr</a>( "Message sent" ) );
+ } else if ( state == Close ) {
+ <a href="qobject.html#deleteLater">deleteLater</a>();
+ return;
+ } else {
+ // something broke.
+<a name="x708"></a><a name="x704"></a> QMessageBox::<a href="qmessagebox.html#warning">warning</a>( qApp-&gt;<a href="qapplication.html#activeWindow">activeWindow</a>(),
+ <a href="qobject.html#tr">tr</a>( "Qt Mail Example" ),
+ <a href="qobject.html#tr">tr</a>( "Unexpected reply from SMTP server:\n\n" ) +
+ response );
+ state = Close;
+ }
+
+ response = "";
+}
+</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>