1 /* 2 * Copyright (c) 1995, 2011, Oracle and/or its affiliates. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.net.smtp; 27 28 import java.io.*; 29 import java.net.*; 30 import sun.net.TransferProtocolClient; 31 import sun.security.action.GetPropertyAction; 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", e); 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 = GetPropertyAction.getProperty("mail.host"); 161 if (mailhost != null) { 162 openServer(mailhost); 163 return; 164 } 165 } catch(Exception e) { 166 } 167 try { 168 mailhost = "localhost"; 169 openServer(mailhost); 170 } catch(Exception e) { 171 mailhost = "mailhost"; 172 openServer(mailhost); 173 } 174 } 175 176 /** Create an uninitialized SMTP client. */ 177 public SmtpClient () throws IOException { 178 this(null); 179 } 180 181 public SmtpClient(int to) throws IOException { 182 super(); 183 setConnectTimeout(to); 184 try { 185 String s; 186 mailhost = GetPropertyAction.getProperty("mail.host"); 187 if (mailhost != null) { 188 openServer(mailhost); 189 return; 190 } 191 } catch(Exception e) { 192 } 193 try { 194 mailhost = "localhost"; 195 openServer(mailhost); 196 } catch(Exception e) { 197 mailhost = "mailhost"; 198 openServer(mailhost); 199 } 200 } 201 202 public String getMailHost() { 203 return mailhost; 204 } 205 206 String getEncoding () { 207 return encoding; 208 } 209 } 210 211 class SmtpPrintStream extends java.io.PrintStream { 212 private SmtpClient target; 213 private int lastc = '\n'; 214 215 SmtpPrintStream (OutputStream fos, SmtpClient cl) throws UnsupportedEncodingException { 216 super(fos, false, cl.getEncoding()); 217 target = cl; 218 } 219 220 public void close() { 221 if (target == null) 222 return; 223 if (lastc != '\n') { 224 write('\n'); 225 } 226 try { 227 target.issueCommand(".\r\n", 250); 228 target.message = null; 229 out = null; 230 target = null; 231 } catch (IOException e) { 232 } 233 } 234 235 public void write(int b) { 236 try { 237 // quote a dot at the beginning of a line 238 if (lastc == '\n' && b == '.') { 239 out.write('.'); 240 } 241 242 // translate NL to CRLF 243 if (b == '\n' && lastc != '\r') { 244 out.write('\r'); 245 } 246 out.write(b); 247 lastc = b; 248 } catch (IOException e) { 249 } 250 } 251 252 public void write(byte b[], int off, int len) { 253 try { 254 int lc = lastc; 255 while (--len >= 0) { 256 int c = b[off++]; 257 258 // quote a dot at the beginning of a line 259 if (lc == '\n' && c == '.') 260 out.write('.'); 261 262 // translate NL to CRLF 263 if (c == '\n' && lc != '\r') { 264 out.write('\r'); 265 } 266 out.write(c); 267 lc = c; 268 } 269 lastc = lc; 270 } catch (IOException e) { 271 } 272 } 273 public void print(String s) { 274 int len = s.length(); 275 for (int i = 0; i < len; i++) { 276 write(s.charAt(i)); 277 } 278 } 279 }