/*
* Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.net.smtp;
import java.util.StringTokenizer;
import java.io.*;
import java.net.*;
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.
*
* @author James Gosling
*/
public class SmtpClient extends TransferProtocolClient {
String mailhost;
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 {
if (s.startsWith("<"))
issueCommand("rcpt to: " + s + "\r\n", 250);
else
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 {
if (s.startsWith("<"))
issueCommand("mail from: " + s + "\r\n", 250);
else
issueCommand("mail from: <" + s + ">\r\n", 250);
}
/** open a SMTP connection to host <i>host</i>. */
private void openServer(String host) throws IOException {
mailhost = host;
openServer(mailhost, 25);
issueCommand("helo "+InetAddress.getLocalHost().getHostName()+"\r\n", 250);
}
public PrintStream startMessage() throws IOException {
issueCommand("data\r\n", 354);
try {
message = new SmtpPrintStream(serverOutput, this);
} catch (UnsupportedEncodingException e) {
throw new InternalError(encoding+" encoding not found", e);
}
return message;
}
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);
mailhost = host;
return;
} catch(Exception e) {
}
}
try {
String s;
mailhost = java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("mail.host"));
if (mailhost != null) {
openServer(mailhost);
return;
}
} catch(Exception e) {
}
try {
mailhost = "localhost";
openServer(mailhost);
} catch(Exception e) {
mailhost = "mailhost";
openServer(mailhost);
}
}
/** Create an uninitialized SMTP client. */
public SmtpClient () throws IOException {
this(null);
}
public SmtpClient(int to) throws IOException {
super();
setConnectTimeout(to);
try {
String s;
mailhost = java.security.AccessController.doPrivileged(
new sun.security.action.GetPropertyAction("mail.host"));
if (mailhost != null) {
openServer(mailhost);
return;
}
} catch(Exception e) {
}
try {
mailhost = "localhost";
openServer(mailhost);
} catch(Exception e) {
mailhost = "mailhost";
openServer(mailhost);
}
}
public String getMailHost() {
return mailhost;
}
String getEncoding () {
return encoding;
}
}
class SmtpPrintStream extends java.io.PrintStream {
private SmtpClient target;
private int lastc = '\n';
SmtpPrintStream (OutputStream fos, SmtpClient cl) throws UnsupportedEncodingException {
super(fos, false, cl.getEncoding());
target = cl;
}
public void close() {
if (target == null)
return;
if (lastc != '\n') {
write('\n');
}
try {
target.issueCommand(".\r\n", 250);
target.message = null;
out = null;
target = null;
} catch (IOException e) {
}
}
public void write(int b) {
try {
// quote a dot at the beginning of a line
if (lastc == '\n' && b == '.') {
out.write('.');
}
// translate NL to CRLF
if (b == '\n' && lastc != '\r') {
out.write('\r');
}
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++];
// quote a dot at the beginning of a line
if (lc == '\n' && c == '.')
out.write('.');
// translate NL to CRLF
if (c == '\n' && lc != '\r') {
out.write('\r');
}
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));
}
}
}