SMTP2HTTPBridge


1   /*
2    * The Apache Software License, Version 1.1
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4    *
5    * Copyright (c) 2000 The Apache Software Foundation.  All rights 
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57  
58  package org.apache.soap.server;
59  
60  import java.io.*;
61  import java.net.*;
62  import java.util.*;
63  
64  import com.ibm.network.mail.base.*;
65  import com.ibm.network.mail.smtp.event.*;
66  import org.apache.soap.util.net.*;
67  import org.apache.soap.util.*;
68  import org.apache.soap.rpc.SOAPContext;
69  import org.apache.soap.Constants;
70  import org.apache.soap.transport.*;
71  import org.apache.soap.transport.smtp.*;
72  import javax.mail.MessagingException  ;
73  
74  /**
75   * This class can be used as a bridge to relay SOAP messages received via
76   * email to an HTTP SOAP listener. This is basically a polling POP3 client
77   * that keeps looking for new messages to work on. When it gets one,
78   * it forwards it to a SOAP HTTP listener and forwards the response via
79   * SMTP to the original requestor (to either the ReplyTo: or From: address).
80   *
81   * @author Sanjiva Weerawarana (sanjiva@watson.ibm.com)
82   */
83  public class SMTP2HTTPBridge implements Runnable   {
84    Object   waitObject = new Object   ();
85    long pollDelayMillis;
86    com.ibm.network.mail.pop3.protocol.CoreProtocolBean pop3 =
87      new com.ibm.network.mail.pop3.protocol.CoreProtocolBean ();
88    com.ibm.network.mail.smtp.protocol.CoreProtocolBean smtp =
89      new com.ibm.network.mail.smtp.protocol.CoreProtocolBean ();
90    URL httpURL;
91  
92    /**
93     * Constructor: creates a bridge. Call run() to start polling using
94     * the current thread. (If you want to use a separate thread then
95     * do new Thread (new SMT2HTTPBridge (...)).start ();
96     *
97     * @param pollDelayMillis number of milli-seconds to sleep b'ween polls
98     * @param popServer hostname of POP3 server
99     * @param popLoginName login ID
100    * @param password password for login
101    * @param smtpServer hostname of SMTP server
102    */
103   public SMTP2HTTPBridge (/* POP3 params */
104                           long pollDelayMillis,
105                           String   popServer, String   popLoginName,
106                           String   password,
107                           /* HTTP params */
108                           URL httpURL,
109                           /* SMTP params */
110                           String   smtpServer) {
111     /* set up the pop3 side */
112     this.pollDelayMillis = pollDelayMillis;
113     pop3.setPOP3ServerHost (popServer);
114     pop3.setUserOptions(/* popLoginName */ popLoginName,
115       /* password */ password,
116       /* leaveMessagesOnServer */ false,
117       /* rememberPassword */ false);
118     pop3.addMessageListener (
119       new com.ibm.network.mail.pop3.event.MessageListener () {
120         public void messageReceived (
121             com.ibm.network.mail.pop3.event.MessageEvent me) {
122           receiveMessage (me.getMessage ());
123         }
124       }
125     );
126     pop3.addStatusListener (new POP3StatusListener ());
127 
128     /* set up the http side */
129     this.httpURL = httpURL;
130 
131     /* set up the smtp side */
132     smtp.setSmtpServerHost (smtpServer);
133     smtp.addStatusListener (new StatusListener () {
134       public void operationComplete (StatusEvent e) {
135         System.err.println ("DONE: " + e.getStatusString ());
136         synchronized (waitObject) {
137           waitObject.notify ();
138         }
139       }
140 
141       public void processStatus (StatusEvent e) {
142         System.err.println ("Status update: " + e.getStatusString ());
143       }
144     });
145   }
146 
147   /**
148    * Poll for messages forever.
149    */
150   public void run () {
151     while (true) {
152       if (pop3.isReady ()) {
153         System.err.println ("SMTP2HTTPBridge: Polling for messages ..");
154         pop3.receiveMessage ();
155       }
156       try {
157         Thread.sleep (pollDelayMillis);
158       } catch (Exception   e) {
159         e.printStackTrace ();
160       }
161     }
162   }
163 
164   /**
165    * This is called by the POP3 message listener after receiving a 
166    * message from the pop server.
167    * 
168    * @param msg the message that was received
169    */
170   void receiveMessage (MimeMessage msg) {
171     /* extract the stuff from the SMTP message received */
172     String   subject = msg.getHeader (SMTPConstants.SMTP_HEADER_SUBJECT);
173     String   actionURI = msg.getHeader (Constants.HEADER_SOAP_ACTION);
174     String   toAddr = msg.getHeader (SMTPConstants.SMTP_HEADER_TO);
175     String   fromAddr = msg.getHeader (SMTPConstants.SMTP_HEADER_FROM);
176     MimeBodyPart mbp = (MimeBodyPart) msg.getContent ();
177     byte[] ba = (byte[]) mbp.getContent ();
178 
179     /* forward the content to the HTTP listener as an HTTP POST */
180     Hashtable headers = new Hashtable ();
181     headers.put (Constants.HEADER_SOAP_ACTION, actionURI);
182     TransportMessage response;
183     // This is the reponse SOAPContext. Sending it as a reply not supported yet.
184     SOAPContext ctx;
185     try
186     {
187         // Note: no support for multipart MIME request yet here...
188         TransportMessage tmsg = new TransportMessage(new String   (ba),
189                                                      new SOAPContext(),
190                                                      headers);
191         tmsg.save();
192 
193         response = HTTPUtils.post (httpURL, tmsg,
194                                    30000, null, 0);
195         ctx = response.getSOAPContext();
196     } catch (Exception   e) {
197         e.printStackTrace();
198     return;
199     }
200     System.err.println ("HTTP RESPONSE IS: ");
201     String   payload = null;
202     try {
203       // read the stream
204         payload = IOUtils.getStringFromReader (response.getEnvelopeReader());
205     } catch (Exception   e) {
206       e.printStackTrace ();
207     }
208     System.err.println ("'" + payload + "'");
209 
210     /* forward the response via SMTP to the original sender */
211     MimeBodyPart mbpResponse = new MimeBodyPart ();
212     mbpResponse.setContent (new String   (payload), response.getContentType());
213     mbpResponse.setEncoding (MimePart.SEVENBIT);
214     mbpResponse.setDisposition (MimePart.INLINE);
215 
216     MimeMessage msgResponse = new MimeMessage();
217     msgResponse.setContent (mbpResponse, "");
218     msgResponse.addHeader (SMTPConstants.SMTP_HEADER_SUBJECT,
219                            "Re: " + subject);
220     msgResponse.addHeader (Constants.HEADER_SOAP_ACTION, actionURI);
221     msgResponse.addHeader (SMTPConstants.SMTP_HEADER_FROM, 
222                            SMTPUtils.getAddressFromAddressHeader (toAddr));
223     String   sendTo = SMTPUtils.getAddressFromAddressHeader (fromAddr);
224     msgResponse.addRecipients (MimeMessage.TO, 
225                                new InternetAddress[] { 
226                                  new InternetAddress (sendTo)
227                                });
228     smtp.sendMessage (msgResponse);
229   }
230 
231   public static void main (String  [] args) throws Exception   {
232     if (args.length != 6) {
233       System.err.println ("Usage: java " + SMTP2HTTPBridge.class.getName () +
234                           " polldelay \\");
235       System.err.println ("\t\t pop3host pop3login pop3passwd httpurl " +
236                           "smtphostname");
237       System.err.println ("  where:");
238       System.err.println ("    polldelay    number of millisec to " +
239                           "sleep between polls");
240       System.err.println ("    pop3host     hostname of the POP3 server");
241       System.err.println ("    pop3login    login ID of POP3 account");
242       System.err.println ("    pop3passwd   POP3 account password");
243       System.err.println ("    routerURL    http URL of SOAP router to " +
244                           "bridge to");
245       System.err.println ("    smtphostname SMTP server host name");
246       System.exit (1);
247     }
248     SMTP2HTTPBridge sb = new SMTP2HTTPBridge (/* POP3 params */
249                                               Integer.parseInt (args[0]),
250                                               args[1],
251                                               args[2],
252                                               args[3],
253                                               /* HTTP params */
254                                               new URL (args[4]),
255                                               /* SMTP params */
256                                               args[5]);
257     new Thread   (sb).start ();
258   }
259 }
260
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