Fixed filenaming

src/zutil/net/smtp/SmtpClient.java

@@ -0,0 +1,178 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Ziver Koc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package zutil.net.smtp;
+
+import zutil.log.LogUtil;
+
+import java.io.*;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * A simple class that connects, authenticates and sends emails through a SMTP server
+ *
+ * @see <a href="http://cr.yp.to/smtp/client.html">SMTP Summary</a>
+ * @see <a href="https://www.ietf.org/rfc/rfc2821.txt">RFC2821</a>
+ * @author Ziver
+ *
+ */
+public class SmtpClient {
+	private static final Logger logger = LogUtil.getLogger();
+
+	protected static final String NEWLINE   = "\r\n";
+	private static final String CMD_HELO  = "HELO";
+	private static final String CMD_FROM  = "MAIL FROM";
+	private static final String CMD_TO    = "RCPT TO";
+	private static final String CMD_DATA  = "DATA";
+	private static final String CMD_DATA_END  = ".";
+	private static final String CMD_RESET = "RSET";
+	private static final String CMD_NOOP  = "NOOP";
+	private static final String CMD_QUIT  = "QUIT";
+
+
+    private Socket socket;
+	private BufferedReader in;
+	private Writer out;
+
+
+    /**
+     * Will look for a SMTP server on localhost on port 25
+     */
+    public SmtpClient() throws IOException {
+        this("localhost", 25);
+    }
+    /**
+     * Will look for a SMTP server on specified host on port 25
+     */
+	public SmtpClient(String host) throws IOException {
+		this(host, 25);
+	}
+	public SmtpClient(String host, int port) throws IOException {
+        socket = new Socket(host, port);
+        in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+        out = new OutputStreamWriter(socket.getOutputStream());
+
+        readCommand();
+        sendCommand(CMD_HELO + " " + InetAddress.getLocalHost().getHostName());
+	}
+
+
+
+	/**
+	 * Sends a basic email to the smtp server
+	 * 
+	 * @param   from    the senders email address
+	 * @param   to      the recipients email address
+	 * @param   subj    the email subject line
+	 * @param   msg     the email body message
+	 */
+	public synchronized void send(String from, String to, String subj, String msg) throws IOException{
+        Email email = new Email();
+        email.setFrom(from);
+        email.setTo(to);
+        email.setSubject(subj);
+        email.setMessage(msg);
+        send(email);
+	}
+
+    /**
+     * Sends a email to the connected SMTP server
+     *
+     * @param   email   a email object containing message specific data
+     */
+    public synchronized void send(Email email) throws IOException{
+        if(email.getFromAddress() == null)
+            throw new IllegalArgumentException("From value cannot be null!");
+        if(email.getToAddress() == null)
+            throw new IllegalArgumentException("To value cannot be null!");
+        try{
+            // Pre metadata
+            sendCommand(CMD_FROM + ":" + email.getFromAddress());
+            sendCommand(CMD_TO + ":" + email.getToAddress());
+            sendCommand(CMD_DATA);
+            // Message headers and body
+            email.write(out);
+            out.write(NEWLINE);
+            sendCommand(CMD_DATA_END);
+            reset();
+        }catch(IOException e){
+            logger.log(Level.SEVERE, null,e );
+        }
+    }
+
+
+
+	/**
+	 * Sends the given line to the server and return the last line of the response
+	 *
+     * @param   cmd     a String command that will be sent to the server
+	 * @return the server response code
+	 */
+	public synchronized int sendCommand(String cmd) throws IOException{
+		logger.finest(">> "+cmd);
+	    out.write(cmd + NEWLINE);
+	    out.flush();
+		String reply = readCommand();
+		return parseReturnCode(reply);
+	}
+
+	/**
+	 * Reads on line from the command channel
+     *
+	 * @throws IOException if the server returns a error code
+	 */
+	public synchronized String readCommand() throws IOException{
+		String tmp = in.readLine();
+		logger.finest(">> "+tmp);
+		if(parseReturnCode(tmp) >= 400 )
+			throw new IOException(tmp);
+
+		return tmp;
+	}
+
+    private static int parseReturnCode(String msg){
+        return Integer.parseInt(msg.substring(0, 3));
+    }
+
+    /**
+     * Reset the server context, this needs to be done
+     * between emails id multiple messages are sent
+     */
+    public synchronized void reset() throws IOException {
+        sendCommand(CMD_RESET);
+    }
+
+	public synchronized void close() throws IOException{
+        if (in != null) {
+            sendCommand(CMD_QUIT);
+            socket.close();
+            socket = null;
+            in = null;
+            out = null;
+        }
+	}
+}