src/org/sonews/mlgw/SMTPTransport.java
author cli
Tue, 13 Sep 2011 23:34:16 +0200
changeset 58 b2df305a13ce
parent 37 74139325d305
child 59 68a6825a4f4d
permissions -rwxr-xr-x
Work on SMTP authentification for ML sender
chris@3
     1
/*
chris@3
     2
 *   SONEWS News Server
chris@3
     3
 *   see AUTHORS for the list of contributors
chris@3
     4
 *
chris@3
     5
 *   This program is free software: you can redistribute it and/or modify
chris@3
     6
 *   it under the terms of the GNU General Public License as published by
chris@3
     7
 *   the Free Software Foundation, either version 3 of the License, or
chris@3
     8
 *   (at your option) any later version.
chris@3
     9
 *
chris@3
    10
 *   This program is distributed in the hope that it will be useful,
chris@3
    11
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@3
    12
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
chris@3
    13
 *   GNU General Public License for more details.
chris@3
    14
 *
chris@3
    15
 *   You should have received a copy of the GNU General Public License
chris@3
    16
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
chris@3
    17
 */
chris@3
    18
package org.sonews.mlgw;
chris@3
    19
chris@3
    20
import java.io.BufferedOutputStream;
chris@3
    21
import java.io.BufferedReader;
chris@3
    22
import java.io.IOException;
chris@3
    23
import java.io.InputStreamReader;
chris@3
    24
import java.net.Socket;
chris@3
    25
import java.net.UnknownHostException;
chris@3
    26
import org.sonews.config.Config;
chris@3
    27
import org.sonews.storage.Article;
chris@3
    28
import org.sonews.util.io.ArticleInputStream;
chris@3
    29
chris@3
    30
/**
chris@3
    31
 * Connects to a SMTP server and sends a given Article to it.
chris@3
    32
 * @author Christian Lins
cli@28
    33
 * @since sonews/1.0
chris@3
    34
 */
cli@58
    35
class SMTPTransport {
cli@58
    36
cli@58
    37
	public static final String NEWLINE = "\r\n";
chris@3
    38
cli@37
    39
	protected BufferedReader in;
cli@37
    40
	protected BufferedOutputStream out;
cli@37
    41
	protected Socket socket;
chris@3
    42
cli@37
    43
	public SMTPTransport(String host, int port)
cli@58
    44
			throws IOException, UnknownHostException {
cli@58
    45
		this.socket = new Socket(host, port);
cli@58
    46
		this.in = new BufferedReader(
cli@58
    47
				new InputStreamReader(socket.getInputStream()));
cli@37
    48
		this.out = new BufferedOutputStream(socket.getOutputStream());
chris@3
    49
cli@58
    50
		// Read HELO from server
cli@37
    51
		String line = this.in.readLine();
cli@37
    52
		if (line == null || !line.startsWith("220 ")) {
cli@58
    53
			throw new IOException("Invalid HELO from server: " + line);
cli@37
    54
		}
cli@37
    55
	}
chris@3
    56
cli@37
    57
	public void close()
cli@58
    58
			throws IOException {
cli@37
    59
		this.out.write("QUIT".getBytes("UTF-8"));
cli@37
    60
		this.out.flush();
cli@37
    61
		this.in.readLine();
chris@3
    62
cli@37
    63
		this.socket.close();
cli@37
    64
	}
chris@3
    65
cli@58
    66
	private void ehlo(String hostname) throws IOException {
cli@58
    67
		StringBuilder strBuf = new StringBuilder();
cli@58
    68
		strBuf.append("EHLO ");
cli@58
    69
		strBuf.append(hostname);
cli@58
    70
		strBuf.append(NEWLINE);
cli@58
    71
cli@58
    72
		// Send EHLO to server
cli@58
    73
		this.out.write(strBuf.toString().getBytes("UTF-8"));
cli@58
    74
		this.out.flush();
cli@58
    75
cli@58
    76
		// Read reply: "250-example.org Hello example.net"
cli@58
    77
		String line = this.in.readLine();
cli@58
    78
		if (line == null || !line.startsWith("250")) {
cli@58
    79
			throw new IOException("Unexpected reply: " + line);
cli@58
    80
		}
cli@58
    81
cli@58
    82
		// FIXME: More 250- lines possible!
cli@58
    83
cli@58
    84
		// Read reply: "250 AUTH CRAM-MD5 LOGIN PLAIN"
cli@58
    85
		line = this.in.readLine();
cli@58
    86
		if (line == null || !line.startsWith("250 ")) {
cli@58
    87
			throw new IOException("Unexpected reply: " + line);
cli@58
    88
		}
cli@58
    89
		String[] authMethods = line.split(" ");
cli@58
    90
		// TODO: Check for supported methods
cli@58
    91
cli@58
    92
		// Do a PLAIN login
cli@58
    93
		strBuf = new StringBuilder();
cli@58
    94
		strBuf.append("AUTH PLAIN");
cli@58
    95
		strBuf.append(NEWLINE);
cli@58
    96
cli@58
    97
		// Send AUTH to server
cli@58
    98
		this.out.write(strBuf.toString().getBytes("UTF-8"));
cli@58
    99
		this.out.flush();
cli@58
   100
cli@58
   101
		// Read reply
cli@58
   102
		line = this.in.readLine();
cli@58
   103
		if (line == null || !line.startsWith("250 ")) {
cli@58
   104
			throw new IOException("Unexpected reply: " + line);
cli@58
   105
		}
cli@58
   106
	}
cli@58
   107
cli@58
   108
	private void helo(String hostname) throws IOException {
cli@58
   109
		StringBuilder heloStr = new StringBuilder();
cli@58
   110
		heloStr.append("HELO ");
cli@58
   111
		heloStr.append(hostname);
cli@58
   112
		heloStr.append(NEWLINE);
cli@58
   113
cli@58
   114
		// Send HELO to server
cli@58
   115
		this.out.write(heloStr.toString().getBytes("UTF-8"));
cli@58
   116
		this.out.flush();
cli@58
   117
cli@58
   118
		// Read reply
cli@58
   119
		String line = this.in.readLine();
cli@58
   120
		if (line == null || !line.startsWith("250 ")) {
cli@58
   121
			throw new IOException("Unexpected reply: " + line);
cli@58
   122
		}
cli@58
   123
	}
cli@58
   124
cli@58
   125
	public void login() throws IOException {
cli@58
   126
		String hostname = Config.inst().get(Config.HOSTNAME, "localhost");
cli@58
   127
		String auth = Config.inst().get(Config.MLSEND_AUTH, "none");
cli@58
   128
		if(auth.equals("none")) {
cli@58
   129
			helo(hostname);
cli@58
   130
		} else {
cli@58
   131
			ehlo(hostname);
cli@58
   132
		}
cli@58
   133
	}
cli@58
   134
cli@37
   135
	public void send(Article article, String mailFrom, String rcptTo)
cli@58
   136
			throws IOException {
cli@37
   137
		assert (article != null);
cli@37
   138
		assert (mailFrom != null);
cli@37
   139
		assert (rcptTo != null);
cli@12
   140
cli@37
   141
		this.out.write(("MAIL FROM: " + mailFrom).getBytes("UTF-8"));
cli@37
   142
		this.out.flush();
cli@37
   143
		String line = this.in.readLine();
cli@37
   144
		if (line == null || !line.startsWith("250 ")) {
cli@37
   145
			throw new IOException("Unexpected reply: " + line);
cli@37
   146
		}
chris@3
   147
cli@37
   148
		this.out.write(("RCPT TO: " + rcptTo).getBytes("UTF-8"));
cli@37
   149
		this.out.flush();
cli@37
   150
		line = this.in.readLine();
cli@37
   151
		if (line == null || !line.startsWith("250 ")) {
cli@37
   152
			throw new IOException("Unexpected reply: " + line);
cli@37
   153
		}
chris@3
   154
cli@37
   155
		this.out.write("DATA".getBytes("UTF-8"));
cli@37
   156
		this.out.flush();
cli@37
   157
		line = this.in.readLine();
cli@37
   158
		if (line == null || !line.startsWith("354 ")) {
cli@37
   159
			throw new IOException("Unexpected reply: " + line);
cli@37
   160
		}
chris@3
   161
cli@37
   162
		ArticleInputStream artStream = new ArticleInputStream(article);
cli@37
   163
		for (int b = artStream.read(); b >= 0; b = artStream.read()) {
cli@37
   164
			this.out.write(b);
cli@37
   165
		}
chris@3
   166
cli@37
   167
		// Flush the binary stream; important because otherwise the output
cli@37
   168
		// will be mixed with the PrintWriter.
cli@37
   169
		this.out.flush();
cli@37
   170
		this.out.write("\r\n.\r\n".getBytes("UTF-8"));
cli@37
   171
		this.out.flush();
cli@37
   172
		line = this.in.readLine();
cli@37
   173
		if (line == null || !line.startsWith("250 ")) {
cli@37
   174
			throw new IOException("Unexpected reply: " + line);
cli@37
   175
		}
cli@37
   176
	}
chris@3
   177
}