1 // Copyright 2000-2005 the Contributors, as shown in the revision logs.
2 // Licensed under the Apache Public Source License 2.0 ("the License").
3 // You may not use this file except in compliance with the License.
6 import static org.ibex.mail.MailException.*;
7 import org.ibex.crypto.*;
8 import org.ibex.util.*;
9 import org.ibex.mail.protocol.*;
12 import org.ibex.io.Fountain;
17 // FEATURE: MIME RFC2045, 2046, 2049
19 /** This class contains logic for encoding and decoding MIME multipart messages */
22 /** Part = Headers+Body */
23 public static class Part extends JSReflection implements Fountain {
24 public final Headers headers;
25 public final ContentType contentType;
26 private final String encoding;
28 private final Fountain all;
29 private final Fountain body;
31 public Stream getStream() { return all.getStream(); }
32 public int getNumLines() { return all.getNumLines(); }
33 public long getLength() { return all.getLength(); }
34 public Fountain getBody() { return body; }
36 private class BodyFountain implements Fountain {
37 public int getNumLines() { return Stream.countLines(getStream()); }
38 public long getLength() { return Part.this.getLength() - headers.getLength() - 2 /*FIXME: correct?*/; }
39 public Stream getStream() {
41 "quoted-printable".equals(encoding) ? Encode.QuotedPrintable.decode(body.toString(),false) :
42 "base64".equals(encoding) ? Encode.fromBase64(body.toString()) :
44 Headers.Original.skip(all.getStream());
48 public Part(Fountain all) {
49 this.headers = new Headers(all);
50 String ctype = headers.get("content-type");
51 this.encoding = headers.get("content-transfer-encoding");
52 String enc = this.encoding;
53 if (enc!=null) enc = enc.toLowerCase();
54 if (!(enc == null || enc.equals("7bit") || enc.equals("8bit") || enc.equals("binary") ||
55 enc.equals("quoted-printable") || enc.equals("base64"))) {
56 Log.warn(MIME.class, "unknown TransferEncoding \"" + encoding + "\"");
57 ctype = "application/octet-stream";
59 this.contentType = new ContentType(ctype, headers.get("content-description"), headers.get("content-id"), encoding);
61 this.body = new BodyFountain();
65 public Part getPart(int i) {
66 Stream stream = body.getStream();
68 // first part begins with a boundary delimiter
69 for(String s = stream.readln(); s != null; s = stream.readln())
70 if (s.equals("--" + contentType.parameters.get("boundary"))) break;
72 Stream substream = new BoundaryStream(stream, (String)contentType.parameters.get("boundary"));
73 Part p = new Part(substream, true, null); // FIXME split off headers
75 if (substream.isLast()) break;
77 return parts = (Part[])v.copyInto(new Part[v.size()]);
82 public static class Boundary implements Stream.Transformer {
83 private final String boundary;
84 private boolean done = false;
85 private boolean last = false;
86 public Boundary(String bounardy) { this.boundary = boundary; }
87 public boolean isLast() { while(!done) readln(); return last; }
88 public Stream transform(Stream stream) {
89 for(String s = stream.readln(); s != null; s = stream.readln()) {
90 if (boundary != null && (s.equals(boundary) || s.equals(boundary + "--"))) {
91 body.setLength(body.length() - 2); // preceeding CRLF is part of delimiter
92 last = s.equals(boundary + "--");