+// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Licensed under the Apache Public Source License 2.0 ("the License").
+// You may not use this file except in compliance with the License.
+
package org.ibex.mail;
import org.ibex.crypto.*;
-import org.ibex.js.*;
import org.ibex.util.*;
import org.ibex.mail.protocol.*;
+import org.ibex.js.*;
+import org.ibex.io.*;
+import org.ibex.io.Fountain;
import java.util.*;
import java.net.*;
import java.io.*;
-// FIXME MIME: RFC2045, 2046, 2049
-// NOTE: always use Win32 line endings
-// hard line limit: 998 chars
-// soft line limit (suggested): 78 chars
-// header fields: ascii 33-126 (but no colon)
-// field body: anything ASCII except CRLF
-// folded headers: can insert CRLF anywhere that whitespace appears (before the whitespace)
-// body needs CRLF; one or the other alone is not acceptable
-// date/time parsing: see 3.3
+// FIXME: body constraints (how to enforce?)
+// - messages must NEVER contain 8-bit binary data; this is a violation of IMAP
+// - RFC822 1,000-char limit per line [soft line limit (suggested): 78 chars / hard line limit: 998 chars]
// FEATURE: PGP-signature-parsing
-// FEATURE: mailing list header parsing
-// FEATURE: delivery status notification (and the sneaky variety)
+// FEATURE: mailing list header parsing (?)
// FEATURE: threading as in http://www.jwz.org/doc/threading.html
-public class Message extends JSReflection {
-
- public final String allHeaders; // pristine headers
- public final Hashtable headers; // hash of headers (not including resent's and traces)
- public final String body; // entire body
-
- // parsed header fields
- public final Date date;
- public final Address to;
- public final Address from; // if multiple From entries, this is sender
- public final Address replyto; // if none provided, this is equal to sender
- public final String subject;
- public final String messageid;
- public final Address[] cc;
- public final Address[] bcc;
- public final Hashtable[] resent;
- public final Trace[] traces;
-
- // envelope fields
- public final Address envelopeFrom;
- public final Address[] envelopeTo;
-
- public void dump(OutputStream os) {
- Log.error(this, "not implemented");
- }
-
- public static class StoredMessage extends Message {
- public StoredMessage(/*ReadStream rs*/SMTP.LineReader rs, boolean dotTerminatedLikeSMTP) throws IOException {
- super(rs, dotTerminatedLikeSMTP); uid = -1; }
- public final int uid;
- public boolean deleted = false;
- public boolean read = false;
- public boolean answered = false;
- public String dumpStoredForm() { throw new Error("StoredMessage.dumpStoredForm() not implemented"); };
- public static StoredMessage undump(InputStream os) {
- Log.error(StoredMessage.class, "not implemented");
- return null;
- }
+/**
+ * [immutable] This class encapsulates a message "floating in the
+ * ether": RFC2822 data but no storage-specific flags or other
+ * metadata.
+ */
+public class Message extends MIME.Part {
+
+ // Parsed Headers //////////////////////////////////////////////////////////////////////////////
+
+ public final Address to;
+ public final Address from; // if multiple From entries, this is sender
+ public final Address envelopeFrom;
+ public final Address envelopeTo;
+ public final Date date;
+ public final Date arrival;
+ public final Address replyto; // if none provided, this is equal to sender
+ public final String subject;
+ public final String messageid;
+ public final Address[] cc;
+ public final Address[] bcc;
+
+ public static Message newMessage(Fountain in) throws Malformed { return new Message(in); }
+
+ /*
+ public Message reply(Fountain in, Address from, boolean includeReInSubject) throws Malformed {
+ Address to = null;
+ if (to==null) to = Address.parse(headers.get("reply-to"));
+ if (to==null) to = Address.parse(headers.get("from"));
+ if (to==null) to = envelopeFrom;
+ if (to==null) throw new Malformed("cannot reply to a message without a return address");
+ Message ret = newMessage(in, from, to);
+ ret.headers.put("In-Reply-To", messageid);
+ String references = headers.get("references");
+ ret.headers.put("References", messageid + (references==null?"":(" "+references)));
+ if (includeReInSubject && subject!=null && !subject.toLowerCase().trim().startsWith("re:"))
+ headers.put("subject", "Re: "+subject);
+ return ret;
}
-
- public static class Address extends JSReflection {
- public String coerceToString() {
- if (description == null || description.equals("")) return user +"@"+ host;
- return description + " " + "<" + user +"@"+ host + ">";
- }
- public final String user;
- public final String host;
- public final String description;
- public Address(String user, String host, String description) {
- this.user = user; this.host = host; this.description = description;
- }
- public Address(String s) {
- s = s.trim();
- String descrip = null;
- if (s.indexOf('<') != -1) {
- if (s.indexOf('>') == -1) { /* FIXME */ }
- descrip = s.substring(0, s.indexOf('<')) + s.substring(s.indexOf('>') + 1);
- s = s.substring(s.indexOf('<') + 1, s.indexOf('>'));
+ */
+
+ // FIXME
+ //public static Message newMessage(Headers headers, Fountain body, Address from, Address to) throws Malformed {
+ //}
+
+ public static Message newMessage(Fountain in, Address from, Address to) throws Malformed {
+ StringBuffer sb = new StringBuffer();
+ if (from != null) sb.append("Return-Path: " + from.toString(true) + "\r\n");
+ Stream stream = in.getStream();
+ while(true) {
+ String s = stream.readln();
+ if (s == null || s.length() == 0) {
+ if (to != null) sb.append("Envelope-To: " + to.toString(true) + "\r\n");
+ sb.append("\r\n");
+ break;
}
- if (s.indexOf('@') == -1) { /* FIXME */ }
- description = descrip;
- user = s.substring(0, s.indexOf('@'));
- host = s.substring(s.indexOf('@')+1);
+ if (to != null && s.toLowerCase().startsWith("envelope-to:")) continue;
+ if (s.toLowerCase().startsWith("return-path:")) continue;
+ sb.append(s);
+ sb.append("\r\n");
}
+ for(String s = stream.readln(); s != null; s = stream.readln()) {
+ sb.append(s);
+ sb.append("\r\n");
+ }
+ return new Message(new Fountain.StringFountain(sb.toString()));
}
- public class Trace {
- String returnPath = null;
- Element[] elements;
- public class Element {
- // FIXME final
- String fromDomain;
- String fromIP;
- String toDomain;
- String forWhom;
- Date date;
+ private Message(Fountain in) throws Malformed {
+ super(in);
+
+ this.envelopeTo = headers.get("Envelope-To") != null ? Address.parse(headers.get("Envelope-To")) : null;
+ this.envelopeFrom = headers.get("Return-Path") != null ? Address.parse(headers.get("Return-Path")) : null;
+ this.to = headers.get("To") != null ? Address.parse(headers.get("To")) : this.envelopeTo;
+ this.from = headers.get("From") != null ? Address.parse(headers.get("From")) : this.envelopeFrom;
+ this.replyto = headers.get("Reply-To") == null ? null : Address.parse(headers.get("Reply-To"));
+ this.subject = headers.get("Subject");
+ this.messageid = headers.get("Message-Id");
+ this.cc = Address.list(headers.get("Cc"));
+ this.bcc = Address.list(headers.get("Bcc"));
+ this.date = parseDate(headers.get("Date")) == null ? new Date() : parseDate(headers.get("Date"));
+
+ // reenable this once whitelisting is moved out of javascript
+ //if (this.messageid==null)
+ //throw new RuntimeException("every RFC2822 message must have a Message-ID: header");
+
+ /*
+ // synthesize a message-id if not provided
+ this.messageid = headers.get("Message-Id") == null ? generateFreshMessageId(sha1(in.getStream())) : headers.get("Message-Id");
+ if (headers.get("Message-Id") == null) {
+ headers = headers.set("Message-Id", this.messageid);
+ Log.warn(Message.class, "synthesizing message-id for " + summary());
}
+ */
+
+ this.arrival = this.date; // FIXME wrong; grab this from traces?
}
- // FIXME: support dotTerminatedLikeSMTP
- public Message(/*ReadStream rs*/SMTP.LineReader rs, boolean dotTerminatedLikeSMTP) throws IOException {
- String key = null;
- StringBuffer all = new StringBuffer();
- String lastKey = null;
- replyto = null;
- subject = null;
- messageid = null;
- cc = null;
- bcc = null;
- resent = null;
- traces = null;
- envelopeFrom = null;
- envelopeTo = null;
-
- headers = new Hashtable();
- date = null; // FIXME
- to = null;
- from = null;
- for(String s = rs.readLine(); s != null && !s.equals(""); s = rs.readLine()) {
- all.append(s);
- all.append("\r\n");
- if (Character.isSpace(s.charAt(0))) {
- if (lastKey == null) { /* FIXME */ }
- headers.put(lastKey, headers.get(lastKey) + s);
- continue;
- }
- if (s.indexOf(':') == -1) { /* FIXME */ }
-
- key = s.substring(0, s.indexOf(':'));
- String val = s.substring(0, s.indexOf(':') + 1);
- while(Character.isSpace(val.charAt(0))) val = val.substring(1);
-
- if (headers.get(key) != null)
- if (key.startsWith("Resent-")) {
- // FIXME: multi-resent headers
- } else if (key.startsWith("Return-Path:")) {
- // FIXME: parse traces, see RFC2821, section 4.4
- } else if (key.startsWith("Recieved:")) {
- // FIXME: parse traces, see RFC2821, section 4.4
- } else {
- // just append it to the previous one; valid for Comments/Keywords
- val = headers.get(key) + " " + val;
- }
-
- headers.put(key, val);
+ /*
+ private static String sha1(Stream stream) {
+ SHA1 sha1 = new SHA1();
+ byte[] b = new byte[1024];
+ while(true) {
+ int numread = stream.read(b, 0, b.length);
+ if (numread == -1) break;
+ sha1.update(b, 0, numread);
}
- allHeaders = all.toString();
- StringBuffer body = new StringBuffer();
- for(String s = rs.readLine(); s != null && !s.equals(""); s = rs.readLine()) body.append(s);
- this.body = body.toString();
+ byte[] results = new byte[sha1.getDigestSize()];
+ sha1.doFinal(results, 0);
+ return new String(Encode.toBase64(results));
}
+ */
+
+
+ // Helpers /////////////////////////////////////////////////////////////////////////////
// http://www.jwz.org/doc/mid.html
+ private static final Random random = new Random();
public static String generateFreshMessageId() {
+ return generateFreshMessageId(Base36.encode(System.currentTimeMillis())+'.'+
+ Base36.encode(random.nextLong()));
+ }
+ public static String generateFreshMessageId(String seed) {
StringBuffer ret = new StringBuffer();
ret.append('<');
- ret.append(Base36.encode(System.currentTimeMillis()));
- ret.append('.');
- ret.append(Base36.encode(random.nextLong()));
- ret.append('.');
+ ret.append(seed);
+ ret.append('@');
try { ret.append(InetAddress.getLocalHost().getHostName()); } catch (UnknownHostException e) { /* DELIBERATE */ }
ret.append('>');
return ret.toString();
}
- private static final Random random = new Random();
+ public static Date parseDate(String s) {
+ // FIXME!!! this must be robust
+ // date/time parsing: see spec, 3.3
+ return null;
+ }
+
+ // this is belived to be compliant with QSBMF (http://cr.yp.to/proto/qsbmf.txt)
+ public Message bounce(String reason) {
+ if (envelopeFrom==null || envelopeFrom.toString().equals("")) return null;
+
+ Log.warn(Message.class, "bouncing message due to: " + reason);
+ Headers h = new Headers.Original(headers.getStream());
+ h = h.set(new String[] {
+ "Envelope-To", envelopeFrom.toString(),
+ "Return-Path", "<>",
+ "From", "MAILER-DAEMON <>",
+ "To", envelopeFrom.toString(),
+ "Subject", "failure notice"
+ });
+
+ String error =
+ "\r\n"+
+ "Hi. This is the Ibex Mail Server. I'm afraid I wasn't able to deliver\r\n"+
+ "your message to the following addresses. This is a permanent error;\r\n"+
+ "I've given up. Sorry it didn't work out\r\n."+
+ "\r\n"+
+ "<"+envelopeTo.toString()+">:\r\n"+
+ reason+"\r\n"+
+ "\r\n"+
+ "--- Below this line is a copy of the message.\r\n"+
+ "\r\n";
+
+ try {
+ return newMessage(Fountain.Util.concat(h, Fountain.Util.create(error), getBody()));
+ } catch (Message.Malformed e) {
+ Log.error(this, "caught Message.Malformed in Message.bounce(); this should never happen");
+ Log.error(this, e);
+ return null;
+ }
+ }
+
+ public String toString() { throw new RuntimeException("Message.toString() called"); }
+ public final String summary() { return "[" + envelopeFrom + " -> " + envelopeTo + "] " + subject; }
+
+ public static class Malformed extends MailException { public Malformed(String s) { super(s); } }
}
+