J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1995-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.net.smtp; |
| 27 | |
| 28 | import java.util.StringTokenizer; |
| 29 | import java.io.*; |
| 30 | import java.net.*; |
| 31 | import sun.net.TransferProtocolClient; |
| 32 | |
| 33 | /** |
| 34 | * This class implements the SMTP client. |
| 35 | * You can send a piece of mail by creating a new SmtpClient, calling |
| 36 | * the "to" method to add destinations, calling "from" to name the |
| 37 | * sender, calling startMessage to return a stream to which you write |
| 38 | * the message (with RFC733 headers) and then you finally close the Smtp |
| 39 | * Client. |
| 40 | * |
| 41 | * @author James Gosling |
| 42 | */ |
| 43 | |
| 44 | public class SmtpClient extends TransferProtocolClient { |
| 45 | |
| 46 | String mailhost; |
| 47 | SmtpPrintStream message; |
| 48 | |
| 49 | /** |
| 50 | * issue the QUIT command to the SMTP server and close the connection. |
| 51 | */ |
| 52 | public void closeServer() throws IOException { |
| 53 | if (serverIsOpen()) { |
| 54 | closeMessage(); |
| 55 | issueCommand("QUIT\r\n", 221); |
| 56 | super.closeServer(); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | void issueCommand(String cmd, int expect) throws IOException { |
| 61 | sendServer(cmd); |
| 62 | int reply; |
| 63 | while ((reply = readServerResponse()) != expect) |
| 64 | if (reply != 220) { |
| 65 | throw new SmtpProtocolException(getResponseString()); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | private void toCanonical(String s) throws IOException { |
| 70 | if (s.startsWith("<")) |
| 71 | issueCommand("rcpt to: " + s + "\r\n", 250); |
| 72 | else |
| 73 | issueCommand("rcpt to: <" + s + ">\r\n", 250); |
| 74 | } |
| 75 | |
| 76 | public void to(String s) throws IOException { |
| 77 | int st = 0; |
| 78 | int limit = s.length(); |
| 79 | int pos = 0; |
| 80 | int lastnonsp = 0; |
| 81 | int parendepth = 0; |
| 82 | boolean ignore = false; |
| 83 | while (pos < limit) { |
| 84 | int c = s.charAt(pos); |
| 85 | if (parendepth > 0) { |
| 86 | if (c == '(') |
| 87 | parendepth++; |
| 88 | else if (c == ')') |
| 89 | parendepth--; |
| 90 | if (parendepth == 0) |
| 91 | if (lastnonsp > st) |
| 92 | ignore = true; |
| 93 | else |
| 94 | st = pos + 1; |
| 95 | } else if (c == '(') |
| 96 | parendepth++; |
| 97 | else if (c == '<') |
| 98 | st = lastnonsp = pos + 1; |
| 99 | else if (c == '>') |
| 100 | ignore = true; |
| 101 | else if (c == ',') { |
| 102 | if (lastnonsp > st) |
| 103 | toCanonical(s.substring(st, lastnonsp)); |
| 104 | st = pos + 1; |
| 105 | ignore = false; |
| 106 | } else { |
| 107 | if (c > ' ' && !ignore) |
| 108 | lastnonsp = pos + 1; |
| 109 | else if (st == pos) |
| 110 | st++; |
| 111 | } |
| 112 | pos++; |
| 113 | } |
| 114 | if (lastnonsp > st) |
| 115 | toCanonical(s.substring(st, lastnonsp)); |
| 116 | } |
| 117 | |
| 118 | public void from(String s) throws IOException { |
| 119 | if (s.startsWith("<")) |
| 120 | issueCommand("mail from: " + s + "\r\n", 250); |
| 121 | else |
| 122 | issueCommand("mail from: <" + s + ">\r\n", 250); |
| 123 | } |
| 124 | |
| 125 | /** open a SMTP connection to host <i>host</i>. */ |
| 126 | private void openServer(String host) throws IOException { |
| 127 | mailhost = host; |
| 128 | openServer(mailhost, 25); |
| 129 | issueCommand("helo "+InetAddress.getLocalHost().getHostName()+"\r\n", 250); |
| 130 | } |
| 131 | |
| 132 | public PrintStream startMessage() throws IOException { |
| 133 | issueCommand("data\r\n", 354); |
| 134 | try { |
| 135 | message = new SmtpPrintStream(serverOutput, this); |
| 136 | } catch (UnsupportedEncodingException e) { |
| 137 | throw new InternalError(encoding+" encoding not found"); |
| 138 | } |
| 139 | return message; |
| 140 | } |
| 141 | |
| 142 | void closeMessage() throws IOException { |
| 143 | if (message != null) |
| 144 | message.close(); |
| 145 | } |
| 146 | |
| 147 | /** New SMTP client connected to host <i>host</i>. */ |
| 148 | public SmtpClient (String host) throws IOException { |
| 149 | super(); |
| 150 | if (host != null) { |
| 151 | try { |
| 152 | openServer(host); |
| 153 | mailhost = host; |
| 154 | return; |
| 155 | } catch(Exception e) { |
| 156 | } |
| 157 | } |
| 158 | try { |
| 159 | String s; |
| 160 | mailhost = java.security.AccessController.doPrivileged( |
| 161 | new sun.security.action.GetPropertyAction("mail.host")); |
| 162 | if (mailhost != null) { |
| 163 | openServer(mailhost); |
| 164 | return; |
| 165 | } |
| 166 | } catch(Exception e) { |
| 167 | } |
| 168 | try { |
| 169 | mailhost = "localhost"; |
| 170 | openServer(mailhost); |
| 171 | } catch(Exception e) { |
| 172 | mailhost = "mailhost"; |
| 173 | openServer(mailhost); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | /** Create an uninitialized SMTP client. */ |
| 178 | public SmtpClient () throws IOException { |
| 179 | this(null); |
| 180 | } |
| 181 | |
| 182 | public SmtpClient(int to) throws IOException { |
| 183 | super(); |
| 184 | setConnectTimeout(to); |
| 185 | try { |
| 186 | String s; |
| 187 | mailhost = java.security.AccessController.doPrivileged( |
| 188 | new sun.security.action.GetPropertyAction("mail.host")); |
| 189 | if (mailhost != null) { |
| 190 | openServer(mailhost); |
| 191 | return; |
| 192 | } |
| 193 | } catch(Exception e) { |
| 194 | } |
| 195 | try { |
| 196 | mailhost = "localhost"; |
| 197 | openServer(mailhost); |
| 198 | } catch(Exception e) { |
| 199 | mailhost = "mailhost"; |
| 200 | openServer(mailhost); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | public String getMailHost() { |
| 205 | return mailhost; |
| 206 | } |
| 207 | |
| 208 | String getEncoding () { |
| 209 | return encoding; |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | class SmtpPrintStream extends java.io.PrintStream { |
| 214 | private SmtpClient target; |
| 215 | private int lastc = '\n'; |
| 216 | |
| 217 | SmtpPrintStream (OutputStream fos, SmtpClient cl) throws UnsupportedEncodingException { |
| 218 | super(fos, false, cl.getEncoding()); |
| 219 | target = cl; |
| 220 | } |
| 221 | |
| 222 | public void close() { |
| 223 | if (target == null) |
| 224 | return; |
| 225 | if (lastc != '\n') { |
| 226 | write('\n'); |
| 227 | } |
| 228 | try { |
| 229 | target.issueCommand(".\r\n", 250); |
| 230 | target.message = null; |
| 231 | out = null; |
| 232 | target = null; |
| 233 | } catch (IOException e) { |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | public void write(int b) { |
| 238 | try { |
| 239 | // quote a dot at the beginning of a line |
| 240 | if (lastc == '\n' && b == '.') { |
| 241 | out.write('.'); |
| 242 | } |
| 243 | |
| 244 | // translate NL to CRLF |
| 245 | if (b == '\n' && lastc != '\r') { |
| 246 | out.write('\r'); |
| 247 | } |
| 248 | out.write(b); |
| 249 | lastc = b; |
| 250 | } catch (IOException e) { |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | public void write(byte b[], int off, int len) { |
| 255 | try { |
| 256 | int lc = lastc; |
| 257 | while (--len >= 0) { |
| 258 | int c = b[off++]; |
| 259 | |
| 260 | // quote a dot at the beginning of a line |
| 261 | if (lc == '\n' && c == '.') |
| 262 | out.write('.'); |
| 263 | |
| 264 | // translate NL to CRLF |
| 265 | if (c == '\n' && lc != '\r') { |
| 266 | out.write('\r'); |
| 267 | } |
| 268 | out.write(c); |
| 269 | lc = c; |
| 270 | } |
| 271 | lastc = lc; |
| 272 | } catch (IOException e) { |
| 273 | } |
| 274 | } |
| 275 | public void print(String s) { |
| 276 | int len = s.length(); |
| 277 | for (int i = 0; i < len; i++) { |
| 278 | write(s.charAt(i)); |
| 279 | } |
| 280 | } |
| 281 | } |