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comparison src/goodjava/mail/Smtp.java @ 1582:f28cc30d56cb

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start goodjava/mail
author Franklin Schmidt <fschmidt@gmail.com>
date Sat, 06 Mar 2021 21:13:34 -0700
parents
children 1cc6c7fa803d
comparison
equal deleted inserted replaced
1581:dbf63bef4b86 1582:f28cc30d56cb
1 package goodjava.mail;
2
3 import java.io.Reader;
4 import java.io.InputStreamReader;
5 import java.io.Writer;
6 import java.io.OutputStreamWriter;
7 import java.io.IOException;
8 import java.net.Socket;
9 import java.util.Base64;
10
11
12 public class Smtp {
13 private final char[] buf = new char[1000];
14 private final Socket socket;
15 private final Reader reader;
16 private final Writer writer;
17 public final String ehlo;
18
19 public Smtp(Socket socket) throws IOException, SmtpException {
20 this.socket = socket;
21 this.reader = new InputStreamReader(socket.getInputStream());
22 this.writer = new OutputStreamWriter(socket.getOutputStream());
23 String s = read();
24 if( !s.startsWith("220") )
25 throw new SmtpException(s);
26 write( "EHLO\r\n" );
27 ehlo = read();
28 if( !ehlo.startsWith("250") )
29 throw new SmtpException(ehlo);
30 }
31
32 public void close() throws IOException, SmtpException {
33 write( "QUIT\r\n" );
34 String s = read();
35 if( !s.startsWith("221") )
36 throw new SmtpException(s);
37 socket.close();
38 }
39
40 public String authenticate(String username,String password) throws IOException, SmtpException {
41 String s = "\0" + username + "\0" + password;
42 s = Base64.getEncoder().encodeToString(s.getBytes());
43 write( "AUTH PLAIN " + s + "\r\n" );
44 String r = read();
45 if( !r.startsWith("235") )
46 throw new SmtpException(r);
47 return r;
48 }
49
50 public String from(String address) throws IOException, SmtpException {
51 write( "MAIL FROM: " + address + "\r\n" );
52 String r = read();
53 if( !r.startsWith("250") )
54 throw new SmtpException(r);
55 return r;
56 }
57
58 public String to(String address) throws IOException, SmtpException {
59 write( "RCPT TO: " + address + "\r\n" );
60 String r = read();
61 if( !r.startsWith("250") )
62 throw new SmtpException(r);
63 return r;
64 }
65
66 public String data(String text) throws IOException, SmtpException {
67 if( !text.endsWith("\r\n") )
68 throw new SmtpException("text must end with \\r\\n");
69 text = text.replace("\r\n.","\r\n..");
70 write( "DATA\r\n" );
71 String r = read();
72 if( !r.startsWith("354") )
73 throw new SmtpException(r);
74 write( text + ".\r\n" );
75 r = read();
76 if( !r.startsWith("250") )
77 throw new SmtpException(r);
78 return r;
79 }
80
81 private String read() throws IOException {
82 int n = reader.read(buf);
83 return new String(buf,0,n);
84 }
85
86 private void write(String s) throws IOException {
87 writer.write(s);
88 writer.flush();
89 }
90
91 public static void main(String[] args) throws Exception {
92 Socket socket = new Socket("smtpcorp.com",2525);
93 Smtp smtp = new Smtp(socket);
94 smtp.authenticate("smtp@luan.software","luanhost");
95 smtp.from("smtp@luan.software");
96 smtp.to("fschmidt@gmail.com");
97 String text = "\r\n"
98 +"test2\r\n"
99 +".q\r\n"
100 +"x\r\n"
101 ;
102 smtp.data(text);
103 smtp.close();
104 }
105 }