/*
* @(#)SmtpClient.java 1.9 95/08/29 James Gosling
*
* Copyright (c) 1995 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for NON-COMMERCIAL purposes and without fee is hereby
* granted provided that this copyright notice appears in all copies. Please
* refer to the file "copyright.html" for further important copyright and
* licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
* LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR
* ITS DERIVATIVES.
*/
package sun.net.smtp;
import java.util.StringTokenizer;
import java.io.*;
import java.net.*;
import java.lang.SecurityManager;
import sun.net.TransferProtocolClient;
/**
* This class implements the SMTP client.
* You can send a piece of mail by creating a new SmtpClient, calling
* the "to" method to add destinations, calling "from" to name the
* sender, calling startMessage to return a stream to which you write
* the message (with RFC733 headers) and then you finally close the Smtp
* Client.
*
* @version 1.17, 12 Dec 1994
* @author James Gosling
*/
public class SmtpClient extends TransferProtocolClient {
SmtpPrintStream message;
/**
* issue the QUIT command to the SMTP server and close the connection.
*/
public void closeServer() throws IOException {
if (serverIsOpen()) {
closeMessage();
issueCommand("QUIT\r\n", 221);
super.closeServer();
}
}
void issueCommand(String cmd, int expect) throws IOException {
sendServer(cmd);
int reply;
while ((reply = readServerResponse()) != expect)
if (reply != 220) {
throw new SmtpProtocolException(getResponseString());
}
}
private void toCanonical(String s) throws IOException {
issueCommand("rcpt to: " + s + "\r\n", 250);
}
public void to(String s) throws IOException {
int st = 0;
int limit = s.length();
int pos = 0;
int lastnonsp = 0;
int parendepth = 0;
boolean ignore = false;
while (pos < limit) {
int c = s.charAt(pos);
if (parendepth > 0) {
if (c == '(')
parendepth++;
else if (c == ')')
parendepth--;
if (parendepth == 0)
if (lastnonsp > st)
ignore = true;
else
st = pos + 1;
} else if (c == '(')
parendepth++;
else if (c == '<')
st = lastnonsp = pos + 1;
else if (c == '>')
ignore = true;
else if (c == ',') {
if (lastnonsp > st)
toCanonical(s.substring(st, lastnonsp));
st = pos + 1;
ignore = false;
} else {
if (c > ' ' && !ignore)
lastnonsp = pos + 1;
else if (st == pos)
st++;
}
pos++;
}
if (lastnonsp > st)
toCanonical(s.substring(st, lastnonsp));
}
public void from(String s) throws IOException {
issueCommand("mail from: " + s + "\r\n", 250);
}
/** open a SMTP connection to host <i>host</i>. */
private void openServer(String host) throws IOException {
openServer(host, 25);
issueCommand("helo "+InetAddress.getLocalHost().getHostName()+"\r\n", 250);
}
public PrintStream startMessage() throws IOException {
issueCommand("data\r\n", 354);
return message = new SmtpPrintStream(serverOutput, this);
}
void closeMessage() throws IOException {
if (message != null)
message.close();
}
/** New SMTP client connected to host <i>host</i>. */
public SmtpClient (String host) throws IOException {
super();
if (host != null) {
try {
openServer(host);
return;
} catch(Exception e) {
}
}
try {
SecurityManager.setScopePermission();
String s = System.getProperty("mail.host");
SecurityManager.resetScopePermission();
if (s != null) {
openServer(s);
return;
}
} catch(Exception e) {
}
try {
openServer("localhost");
} catch(Exception e) {
openServer("mailhost");
}
}
/** Create an uninitialized SMTP client. */
public SmtpClient () throws IOException {
this(null);
}
}
class SmtpPrintStream extends java.io.PrintStream {
private SmtpClient target;
private int lastc = '\n';
SmtpPrintStream (OutputStream fos, SmtpClient cl) {
super(fos);
target = cl;
}
public void close() {
if (target == null)
return;
if (lastc != '\n') {
write('\r');
write('\n');
}
try {
target.issueCommand(".\r\n", 250);
target.message = null;
out = null;
target = null;
} catch (IOException e) {
}
}
public void write(int b) {
try {
if (lastc == '\n' && b == '.')
out.write('.');
out.write(b);
lastc = b;
} catch (IOException e) {
}
}
public void write(byte b[], int off, int len) {
try {
int lc = lastc;
while (--len >= 0) {
int c = b[off++];
if (lc == '\n' && c == '.')
out.write('.');
out.write(c);
lc = c;
}
lastc = lc;
} catch (IOException e) {
}
}
public void print(String s) {
int len = s.length();
for (int i = 0; i < len; i++) {
write(s.charAt(i));
}
}
}