-
Notifications
You must be signed in to change notification settings - Fork 0
/
smtp.cpp
254 lines (212 loc) · 8.03 KB
/
smtp.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
/*
Copyright (c) 2013 Raivis Strogonovs
http://morf.lv
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.*/
#include "smtp.h"
Smtp::Smtp( const QString &user, const QString &pass, const QString &host, int port, int timeout )
{
socket = new QSslSocket(this);
connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
connect(socket, SIGNAL(connected()), this, SLOT(connected() ) );
connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this,SLOT(errorReceived(QAbstractSocket::SocketError)));
connect(socket, SIGNAL(stateChanged(QAbstractSocket::SocketState)), this, SLOT(stateChanged(QAbstractSocket::SocketState)));
connect(socket, SIGNAL(disconnected()), this,SLOT(disconnected()));
this->user = user;
this->pass = pass;
this->host = host;
this->port = port;
this->timeout = timeout;
}
void Smtp::sendMail(const QString &from, const QString &to, const QString &subject, const QString &body, QStringList files)
{
message = "To: " + to + "\n";
message.append("From: " + from + "\n");
message.append("Subject: " + subject + "\n");
//Let's intitiate multipart MIME with cutting boundary "frontier"
message.append("MIME-Version: 1.0\n");
message.append("Content-Type: multipart/mixed; boundary=frontier\n\n");
message.append( "--frontier\n" );
//message.append( "Content-Type: text/html\n\n" ); //Uncomment this for HTML formating, coment the line below
message.append( "Content-Type: text/plain\n\n" );
message.append(subject);//(body);
message.append("\n\n");
if(!files.isEmpty())
{
qDebug() << "Files to be sent: " << files.size();
foreach(QString filePath, files)
{
QFile file(filePath);
if(file.exists())
{
if (!file.open(QIODevice::ReadOnly))
{
qDebug("Couldn't open the file");
QMessageBox::warning( 0, tr( "Qt Simple SMTP client" ), tr( "Couldn't open the file\n\n" ) );
return ;
}
//QByteArray bytes = file.readAll();
QByteArray bytes = body.toUtf8();
message.append( "--frontier\n" );
message.append( "Content-Type: application/octet-stream\nContent-Disposition: attachment; filename="+ QFileInfo(file.fileName()).fileName() +";\nContent-Transfer-Encoding: base64\n\n" );
message.append(bytes.toBase64());
message.append("\n");
}
}
}
else
qDebug() << "No attachments found";
message.append( "--frontier--\n" );
message.replace( QString::fromLatin1( "\n" ), QString::fromLatin1( "\r\n" ) );
message.replace( QString::fromLatin1( "\r\n.\r\n" ),QString::fromLatin1( "\r\n..\r\n" ) );
this->from = from;
rcpt = to;
state = Init;
socket->connectToHostEncrypted(host, port); //"smtp.gmail.com" and 465 for gmail TLS
if (!socket->waitForConnected(timeout)) {
qDebug() << socket->errorString();
}
t = new QTextStream( socket );
}
Smtp::~Smtp()
{
delete t;
delete socket;
}
void Smtp::stateChanged(QAbstractSocket::SocketState socketState)
{
qDebug() <<"stateChanged " << socketState;
}
void Smtp::errorReceived(QAbstractSocket::SocketError socketError)
{
qDebug() << "error " <<socketError;
}
void Smtp::disconnected()
{
qDebug() <<"disconneted";
qDebug() << "error " << socket->errorString();
}
void Smtp::connected()
{
qDebug() << "Connected ";
}
void Smtp::readyRead()
{
qDebug() <<"readyRead";
// SMTP is line-oriented
QString responseLine;
do
{
responseLine = socket->readLine();
response += responseLine;
}
while ( socket->canReadLine() && responseLine[3] != ' ' );
responseLine.truncate( 3 );
qDebug() << "Server response code:" << responseLine;
qDebug() << "Server response: " << response;
if ( state == Init && responseLine == "220" )
{
// banner was okay, let's go on
*t << "EHLO localhost" <<"\r\n";
t->flush();
state = HandShake;
}
//No need, because I'm using socket->startClienEncryption() which makes the SSL handshake for you
/*else if (state == Tls && responseLine == "250")
{
// Trying AUTH
qDebug() << "STarting Tls";
*t << "STARTTLS" << "\r\n";
t->flush();
state = HandShake;
}*/
else if (state == HandShake && responseLine == "250")
{
socket->startClientEncryption();
if(!socket->waitForEncrypted(timeout))
{
qDebug() << socket->errorString();
state = Close;
}
//Send EHLO once again but now encrypted
*t << "EHLO localhost" << "\r\n";
t->flush();
state = Auth;
}
else if (state == Auth && responseLine == "250")
{
// Trying AUTH
qDebug() << "Auth";
*t << "AUTH LOGIN" << "\r\n";
t->flush();
state = User;
}
else if (state == User && responseLine == "334")
{
//Trying User
qDebug() << "Username";
//GMAIL is using XOAUTH2 protocol, which basically means that password and username has to be sent in base64 coding
//https://developers.google.com/gmail/xoauth2_protocol
*t << QByteArray().append(user).toBase64() << "\r\n";
t->flush();
state = Pass;
}
else if (state == Pass && responseLine == "334")
{
//Trying pass
qDebug() << "Pass";
*t << QByteArray().append(pass).toBase64() << "\r\n";
t->flush();
state = Mail;
}
else if ( state == Mail && responseLine == "235" )
{
// HELO response was okay (well, it has to be)
//Apperantly for Google it is mandatory to have MAIL FROM and RCPT email formated the following way -> <[email protected]>
qDebug() << "MAIL FROM:<" << from << ">";
*t << "MAIL FROM:<" << from << ">\r\n";
t->flush();
state = Rcpt;
}
else if ( state == Rcpt && responseLine == "250" )
{
//Apperantly for Google it is mandatory to have MAIL FROM and RCPT email formated the following way -> <[email protected]>
*t << "RCPT TO:<" << rcpt << ">\r\n"; //r
t->flush();
state = Data;
}
else if ( state == Data && responseLine == "250" )
{
*t << "DATA\r\n";
t->flush();
state = Body;
}
else if ( state == Body && responseLine == "354" )
{
*t << message << "\r\n.\r\n";
t->flush();
state = Quit;
}
else if ( state == Quit && responseLine == "250" )
{
*t << "QUIT\r\n";
t->flush();
// here, we just close.
state = Close;
emit status( tr( "Message sent" ) );
}
else if ( state == Close )
{
deleteLater();
return;
}
else
{
// something broke.
QMessageBox::warning( 0, tr( "Qt Simple SMTP client" ), tr( "Unexpected reply from SMTP server:\n\n" ) + response );
state = Close;
emit status( tr( "Failed to send message" ) );
}
response = "";
}