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| 2 | <!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/network/mail/mail.doc:5 -->
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| 3 | <html>
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| 4 | <head>
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| 5 | <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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| 6 | <title>A simple mail client</title>
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| 7 | <style type="text/css"><!--
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| 8 | fn { margin-left: 1cm; text-indent: -1cm; }
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| 9 | a:link { color: #004faf; text-decoration: none }
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| 10 | a:visited { color: #672967; text-decoration: none }
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| 11 | body { background: #ffffff; color: black; }
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| 12 | --></style>
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| 13 | </head>
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| 14 | <body>
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| 15 |
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| 16 | <table border="0" cellpadding="0" cellspacing="0" width="100%">
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| 17 | <tr bgcolor="#E5E5E5">
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| 18 | <td valign=center>
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| 19 | <a href="index.html">
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| 20 | <font color="#004faf">Home</font></a>
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| 21 | | <a href="classes.html">
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| 22 | <font color="#004faf">All Classes</font></a>
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| 23 | | <a href="mainclasses.html">
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| 24 | <font color="#004faf">Main Classes</font></a>
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| 25 | | <a href="annotated.html">
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| 26 | <font color="#004faf">Annotated</font></a>
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| 27 | | <a href="groups.html">
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| 28 | <font color="#004faf">Grouped Classes</font></a>
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| 29 | | <a href="functions.html">
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <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>
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| 33 |
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| 34 |
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| 35 | <p>
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| 36 | <p> This example shows how to use the <a href="qsocket.html">QSocket</a> class. The client can only be
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| 37 | used to send mails. The interesting part is the implementation of the
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| 38 | SMTP protocol.
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| 39 | <p> <hr>
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| 40 | <p> Header file (smtp.h):
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| 41 | <p> <pre>/****************************************************************************
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| 42 | ** $Id: mail-example.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 43 | **
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| 44 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 45 | **
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| 46 | ** This file is part of an example program for Qt. This example
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| 47 | ** program may be used, distributed and modified without limitation.
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| 48 | **
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| 49 | *****************************************************************************/
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| 50 |
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| 51 | #ifndef SMTP_H
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| 52 | #define SMTP_H
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| 53 |
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| 54 | #include <<a href="qobject-h.html">qobject.h</a>>
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| 55 | #include <<a href="qstring-h.html">qstring.h</a>>
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| 56 |
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| 57 | class QSocket;
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| 58 | class QTextStream;
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| 59 | class QDns;
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| 60 |
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| 61 | class Smtp : public <a href="qobject.html">QObject</a>
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| 62 | {
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| 63 | <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
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| 64 |
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| 65 | public:
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| 66 | Smtp( const <a href="qstring.html">QString</a> &from, const <a href="qstring.html">QString</a> &to,
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| 67 | const <a href="qstring.html">QString</a> &subject, const <a href="qstring.html">QString</a> &body );
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| 68 | ~Smtp();
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| 69 |
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| 70 | signals:
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| 71 | void status( const <a href="qstring.html">QString</a> & );
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| 72 |
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| 73 | private slots:
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| 74 | void dnsLookupHelper();
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| 75 | void readyRead();
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| 76 | void connected();
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| 77 |
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| 78 | private:
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| 79 | enum State {
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| 80 | Init,
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| 81 | Mail,
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| 82 | Rcpt,
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| 83 | Data,
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| 84 | Body,
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| 85 | Quit,
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| 86 | Close
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| 87 | };
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| 88 |
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| 89 | <a href="qstring.html">QString</a> message;
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| 90 | <a href="qstring.html">QString</a> from;
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| 91 | <a href="qstring.html">QString</a> rcpt;
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| 92 | <a href="qsocket.html">QSocket</a> *socket;
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| 93 | <a href="qtextstream.html">QTextStream</a> * t;
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| 94 | int state;
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| 95 | <a href="qstring.html">QString</a> response;
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| 96 | <a href="qdns.html">QDns</a> * mxLookup;
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| 97 | };
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| 98 |
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| 99 | #endif
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| 100 | </pre>
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| 101 |
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| 102 | <p> <hr>
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| 103 | <p> Implementation (smtp.cpp):
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| 104 | <p> <pre>/****************************************************************************
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| 105 | ** $Id: mail-example.html 2051 2007-02-21 10:04:20Z chehrlic $
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| 106 | **
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| 107 | ** Copyright (C) 1992-2007 Trolltech ASA. All rights reserved.
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| 108 | **
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| 109 | ** This file is part of an example program for Qt. This example
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| 110 | ** program may be used, distributed and modified without limitation.
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| 111 | **
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| 112 | *****************************************************************************/
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| 113 |
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| 114 | #include "smtp.h"
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| 115 |
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| 116 | #include <<a href="qtextstream-h.html">qtextstream.h</a>>
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| 117 | #include <<a href="qsocket-h.html">qsocket.h</a>>
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| 118 | #include <<a href="qdns-h.html">qdns.h</a>>
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| 119 | #include <<a href="qtimer-h.html">qtimer.h</a>>
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| 120 | #include <<a href="qapplication-h.html">qapplication.h</a>>
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| 121 | #include <<a href="qmessagebox-h.html">qmessagebox.h</a>>
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| 122 | #include <<a href="qregexp-h.html">qregexp.h</a>>
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| 123 |
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| 124 |
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| 125 | <a name="f297"></a>Smtp::Smtp( const <a href="qstring.html">QString</a> &from, const <a href="qstring.html">QString</a> &to,
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| 126 | const <a href="qstring.html">QString</a> &subject,
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| 127 | const <a href="qstring.html">QString</a> &body )
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| 128 | {
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| 129 | socket = new <a href="qsocket.html">QSocket</a>( this );
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| 130 | <a name="x714"></a> <a href="qobject.html#connect">connect</a> ( socket, SIGNAL( <a href="qsocket.html#readyRead">readyRead</a>() ),
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| 131 | this, SLOT( readyRead() ) );
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| 132 | <a name="x711"></a> <a href="qobject.html#connect">connect</a> ( socket, SIGNAL( <a href="qsocket.html#connected">connected</a>() ),
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| 133 | this, SLOT( connected() ) );
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| 134 |
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| 135 | <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 );
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| 136 | <a name="x707"></a> <a href="qobject.html#connect">connect</a>( mxLookup, SIGNAL(<a href="qdns.html#resultsReady">resultsReady</a>()),
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| 137 | this, SLOT(dnsLookupHelper()) );
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| 138 |
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| 139 | <a name="x716"></a> message = QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "From: " ) + from +
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| 140 | QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\nTo: " ) + to +
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| 141 | QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\nSubject: " ) + subject +
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| 142 | QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\n\n" ) + body + "\n";
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| 143 | message.replace( QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\n" ),
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| 144 | QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\r\n" ) );
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| 145 | message.replace( QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\r\n.\r\n" ),
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| 146 | QString::<a href="qstring.html#fromLatin1">fromLatin1</a>( "\r\n..\r\n" ) );
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| 147 |
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| 148 | this->from = from;
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| 149 | rcpt = to;
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| 150 |
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| 151 | state = Init;
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| 152 | }
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| 153 |
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| 154 |
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| 155 | Smtp::~Smtp()
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| 156 | {
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| 157 | delete t;
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| 158 | delete socket;
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| 159 | }
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| 160 |
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| 161 |
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| 162 | void <a name="f298"></a>Smtp::dnsLookupHelper()
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| 163 | {
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| 164 | <a name="x706"></a> <a href="qvaluelist.html">QValueList</a><QDns::MailServer> s = mxLookup-><a href="qdns.html#mailServers">mailServers</a>();
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| 165 | <a name="x720"></a> if ( s.<a href="qvaluelist.html#isEmpty">isEmpty</a>() ) {
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| 166 | <a name="x705"></a> if ( !mxLookup-><a href="qdns.html#isWorking">isWorking</a>() )
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| 167 | emit status( <a href="qobject.html#tr">tr</a>( "Error in MX record lookup" ) );
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| 168 | return;
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| 169 | }
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| 170 |
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| 171 | <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 ) );
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| 172 |
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| 173 | <a name="x710"></a> socket-><a href="qsocket.html#connectToHost">connectToHost</a>( s.<a href="qvaluelist.html#first">first</a>().name, 25 );
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| 174 | t = new <a href="qtextstream.html">QTextStream</a>( socket );
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| 175 | }
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| 176 |
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| 177 |
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| 178 | void <a name="f299"></a>Smtp::connected()
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| 179 | {
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| 180 | <a name="x712"></a> emit status( <a href="qobject.html#tr">tr</a>( "Connected to %1" ).arg( socket-><a href="qsocket.html#peerName">peerName</a>() ) );
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| 181 | }
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| 182 |
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| 183 | void <a name="f300"></a>Smtp::readyRead()
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| 184 | {
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| 185 | // SMTP is line-oriented
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| 186 | <a name="x709"></a> if ( !socket-><a href="qsocket.html#canReadLine">canReadLine</a>() )
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| 187 | return;
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| 188 |
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| 189 | <a href="qstring.html">QString</a> responseLine;
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| 190 | do {
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| 191 | <a name="x713"></a> responseLine = socket-><a href="qsocket.html#readLine">readLine</a>();
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| 192 | response += responseLine;
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| 193 | } while( socket-><a href="qsocket.html#canReadLine">canReadLine</a>() && responseLine[3] != ' ' );
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| 194 | <a name="x718"></a> responseLine.<a href="qstring.html#truncate">truncate</a>( 3 );
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| 195 |
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| 196 | if ( state == Init && responseLine[0] == '2' ) {
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| 197 | // banner was okay, let's go on
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| 198 | *t << "HELO there\r\n";
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| 199 | state = Mail;
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| 200 | } else if ( state == Mail && responseLine[0] == '2' ) {
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| 201 | // HELO response was okay (well, it has to be)
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| 202 | *t << "MAIL FROM: <" << from << ">\r\n";
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| 203 | state = Rcpt;
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| 204 | } else if ( state == Rcpt && responseLine[0] == '2' ) {
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| 205 | *t << "RCPT TO: <" << rcpt << ">\r\n";
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| 206 | state = Data;
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| 207 | } else if ( state == Data && responseLine[0] == '2' ) {
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| 208 | *t << "DATA\r\n";
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| 209 | state = Body;
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| 210 | } else if ( state == Body && responseLine[0] == '3' ) {
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| 211 | *t << message << ".\r\n";
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| 212 | state = Quit;
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| 213 | } else if ( state == Quit && responseLine[0] == '2' ) {
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| 214 | *t << "QUIT\r\n";
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| 215 | // here, we just close.
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| 216 | state = Close;
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| 217 | emit status( <a href="qobject.html#tr">tr</a>( "Message sent" ) );
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| 218 | } else if ( state == Close ) {
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| 219 | <a href="qobject.html#deleteLater">deleteLater</a>();
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| 220 | return;
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| 221 | } else {
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| 222 | // something broke.
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| 223 | <a name="x708"></a><a name="x704"></a> QMessageBox::<a href="qmessagebox.html#warning">warning</a>( qApp-><a href="qapplication.html#activeWindow">activeWindow</a>(),
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| 224 | <a href="qobject.html#tr">tr</a>( "Qt Mail Example" ),
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| 225 | <a href="qobject.html#tr">tr</a>( "Unexpected reply from SMTP server:\n\n" ) +
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| 226 | response );
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| 227 | state = Close;
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| 228 | }
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| 229 |
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| 230 | response = "";
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| 231 | }
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| 232 | </pre>
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| 233 |
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| 234 | <p>See also <a href="network-examples.html">Network Examples</a>.
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| 235 |
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| 236 | <!-- eof -->
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| 237 | <p><address><hr><div align=center>
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| 238 | <table width=100% cellspacing=0 border=0><tr>
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| 239 | <td>Copyright © 2007
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| 240 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 241 | <td align=right><div align=right>Qt 3.3.8</div>
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| 242 | </table></div></address></body>
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| 243 | </html>
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