summaryrefslogtreecommitdiffstats
path: root/mailnews/mime/src/mimemult.cpp
blob: 64f292ec0cdde8980abbb7f0ec7ac5c75dba203f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "msgCore.h"
#include "mimemult.h"
#include "mimemoz2.h"
#include "mimeeobj.h"

#include "prlog.h"
#include "prmem.h"
#include "plstr.h"
#include "prio.h"
#include "nsMimeStringResources.h"
#include "nsMimeTypes.h"
#include <ctype.h>

#ifdef XP_MACOSX
  extern MimeObjectClass mimeMultipartAppleDoubleClass;
#endif

#define MIME_SUPERCLASS mimeContainerClass
MimeDefClass(MimeMultipart, MimeMultipartClass,
       mimeMultipartClass, &MIME_SUPERCLASS);

static int MimeMultipart_initialize (MimeObject *);
static void MimeMultipart_finalize (MimeObject *);
static int MimeMultipart_parse_line (const char *line, int32_t length, MimeObject *);
static int MimeMultipart_parse_eof (MimeObject *object, bool abort_p);

static MimeMultipartBoundaryType MimeMultipart_check_boundary(MimeObject *,
                                const char *,
                                int32_t);
static int MimeMultipart_create_child(MimeObject *);
static bool MimeMultipart_output_child_p(MimeObject *, MimeObject *);
static int MimeMultipart_parse_child_line (MimeObject *, const char *, int32_t,
                       bool);
static int MimeMultipart_close_child(MimeObject *);

extern "C" MimeObjectClass mimeMultipartAlternativeClass;
extern "C" MimeObjectClass mimeMultipartRelatedClass;
extern "C" MimeObjectClass mimeMultipartSignedClass;
extern "C" MimeObjectClass mimeInlineTextVCardClass;
extern "C" MimeExternalObjectClass mimeExternalObjectClass;

#if defined(DEBUG) && defined(XP_UNIX)
static int MimeMultipart_debug_print (MimeObject *, PRFileDesc *, int32_t);
#endif

static int
MimeMultipartClassInitialize(MimeMultipartClass *clazz)
{
  MimeObjectClass    *oclass = (MimeObjectClass *)    clazz;
  MimeMultipartClass *mclass = (MimeMultipartClass *) clazz;

  PR_ASSERT(!oclass->class_initialized);
  oclass->initialize  = MimeMultipart_initialize;
  oclass->finalize    = MimeMultipart_finalize;
  oclass->parse_line  = MimeMultipart_parse_line;
  oclass->parse_eof   = MimeMultipart_parse_eof;

  mclass->check_boundary   = MimeMultipart_check_boundary;
  mclass->create_child     = MimeMultipart_create_child;
  mclass->output_child_p   = MimeMultipart_output_child_p;
  mclass->parse_child_line = MimeMultipart_parse_child_line;
  mclass->close_child      = MimeMultipart_close_child;

#if defined(DEBUG) && defined(XP_UNIX)
  oclass->debug_print = MimeMultipart_debug_print;
#endif

  return 0;
}


static int
MimeMultipart_initialize (MimeObject *object)
{
  MimeMultipart *mult = (MimeMultipart *) object;
  char *ct;

  /* This is an abstract class; it shouldn't be directly instantiated. */
  PR_ASSERT(object->clazz != (MimeObjectClass *) &mimeMultipartClass);

  ct = MimeHeaders_get (object->headers, HEADER_CONTENT_TYPE, false, false);
  mult->boundary = (ct
          ? MimeHeaders_get_parameter (ct, HEADER_PARM_BOUNDARY, NULL, NULL)
          : 0);
  PR_FREEIF(ct);
  mult->state = MimeMultipartPreamble;
  return ((MimeObjectClass*)&MIME_SUPERCLASS)->initialize(object);
}


static void
MimeMultipart_finalize (MimeObject *object)
{
  MimeMultipart *mult = (MimeMultipart *) object;

  object->clazz->parse_eof(object, false);

  PR_FREEIF(mult->boundary);
  if (mult->hdrs)
  MimeHeaders_free(mult->hdrs);
  mult->hdrs = 0;
  ((MimeObjectClass*)&MIME_SUPERCLASS)->finalize(object);
}

int MimeWriteAString(MimeObject *obj, const nsACString &string)
{
  const nsCString &flatString = PromiseFlatCString(string);
  return MimeObject_write(obj, flatString.get(), flatString.Length(), true);
}

static int
MimeMultipart_parse_line (const char *line, int32_t length, MimeObject *obj)
{
  MimeMultipart *mult = (MimeMultipart *) obj;
  MimeContainer *container = (MimeContainer*) obj; 
  int status = 0;
  MimeMultipartBoundaryType boundary;

  NS_ASSERTION(line && *line, "empty line in multipart parse_line");
  if (!line || !*line) return -1;

  NS_ASSERTION(!obj->closed_p, "obj shouldn't already be closed");
  if (obj->closed_p) return -1;

  /* If we're supposed to write this object, but aren't supposed to convert
     it to HTML, simply pass it through unaltered. */
  if (obj->output_p &&
    obj->options &&
    !obj->options->write_html_p &&
    obj->options->output_fn
          && obj->options->format_out != nsMimeOutput::nsMimeMessageAttach)
  return MimeObject_write(obj, line, length, true);

  if (mult->state == MimeMultipartEpilogue)  /* already done */
    boundary = MimeMultipartBoundaryTypeNone;
  else
    boundary = ((MimeMultipartClass *)obj->clazz)->check_boundary(obj, line,
                                                                  length);

  if (boundary == MimeMultipartBoundaryTypeTerminator ||
    boundary == MimeMultipartBoundaryTypeSeparator)
  {
  /* Match!  Close the currently-open part, move on to the next
     state, and discard this line.
   */
    bool endOfPart = (mult->state != MimeMultipartPreamble);
    if (endOfPart)
      status = ((MimeMultipartClass *)obj->clazz)->close_child(obj);
    if (status < 0) return status;
    
    if (boundary == MimeMultipartBoundaryTypeTerminator)
      mult->state = MimeMultipartEpilogue;
    else
    {
      mult->state = MimeMultipartHeaders;
      
      /* Reset the header parser for this upcoming part. */
      NS_ASSERTION(!mult->hdrs, "mult->hdrs should be null here");
      if (mult->hdrs)
        MimeHeaders_free(mult->hdrs);
      mult->hdrs = MimeHeaders_new();
      if (!mult->hdrs)
        return MIME_OUT_OF_MEMORY;
      if (obj->options && obj->options->state &&
          obj->options->state->partsToStrip.Length() > 0)
      {
        nsAutoCString newPart(mime_part_address(obj));
        newPart.Append('.');
        newPart.AppendInt(container->nchildren + 1);
        obj->options->state->strippingPart = false;
        // check if this is a sub-part of a part we're stripping.
        for (uint32_t partIndex = 0; partIndex < obj->options->state->partsToStrip.Length(); partIndex++)
        {
          nsCString &curPartToStrip = obj->options->state->partsToStrip[partIndex];
          if (newPart.Find(curPartToStrip) == 0 && (newPart.Length() == curPartToStrip.Length() || newPart.CharAt(curPartToStrip.Length()) == '.'))
          {
            obj->options->state->strippingPart = true;
            if (partIndex < obj->options->state->detachToFiles.Length())
              obj->options->state->detachedFilePath = obj->options->state->detachToFiles[partIndex];
            break;
          }
        }
      }
    }
    
    // if stripping out attachments, write the boundary line. Otherwise, return
    // to ignore it.
    if (obj->options && obj->options->format_out == nsMimeOutput::nsMimeMessageAttach)
    {
      // Because MimeMultipart_parse_child_line strips out the 
      // the CRLF of the last line before the end of a part, we need to add that
      // back in here.
      if (endOfPart)
        MimeWriteAString(obj, NS_LITERAL_CSTRING(MSG_LINEBREAK));

      status = MimeObject_write(obj, line, length, true);
    }
    return 0;
  }

  /* Otherwise, this isn't a boundary string.  So do whatever it is we
   should do with this line (parse it as a header, feed it to the
   child part, ignore it, etc.) */

  switch (mult->state)
  {
    case MimeMultipartPreamble:
    case MimeMultipartEpilogue:
      /* Ignore this line. */
      break;

    case MimeMultipartHeaders:
    /* Parse this line as a header for the sub-part. */
    {
      status = MimeHeaders_parse_line(line, length, mult->hdrs);
      bool stripping = false;

      if (status < 0) return status;
      
      // If this line is blank, we're now done parsing headers, and should
      // now examine the content-type to create this "body" part.
      //
      if (*line == '\r' || *line == '\n')
      {
        if (obj->options && obj->options->state &&
            obj->options->state->strippingPart)
        {
          stripping = true;
          bool detachingPart = obj->options->state->detachedFilePath.Length() > 0;

          nsAutoCString fileName;
          fileName.Adopt(MimeHeaders_get_name(mult->hdrs, obj->options));
          if (detachingPart)
          {
            char *contentType = MimeHeaders_get(mult->hdrs, "Content-Type", false, false);
            if (contentType)
            {
              MimeWriteAString(obj, NS_LITERAL_CSTRING("Content-Type: "));
              MimeWriteAString(obj, nsDependentCString(contentType));
              PR_Free(contentType);
            }
            MimeWriteAString(obj, NS_LITERAL_CSTRING(MSG_LINEBREAK));
            MimeWriteAString(obj, NS_LITERAL_CSTRING("Content-Disposition: attachment; filename=\""));
            MimeWriteAString(obj, fileName);
            MimeWriteAString(obj, NS_LITERAL_CSTRING("\"" MSG_LINEBREAK));
            MimeWriteAString(obj, NS_LITERAL_CSTRING("X-Mozilla-External-Attachment-URL: "));
            MimeWriteAString(obj, obj->options->state->detachedFilePath);
            MimeWriteAString(obj, NS_LITERAL_CSTRING(MSG_LINEBREAK));
            MimeWriteAString(obj, NS_LITERAL_CSTRING("X-Mozilla-Altered: AttachmentDetached; date=\""));
          }
          else
          {
            nsAutoCString header("Content-Type: text/x-moz-deleted; name=\"Deleted: ");
            header.Append(fileName);
            status = MimeWriteAString(obj, header);
            if (status < 0) 
              return status;
            status = MimeWriteAString(obj, NS_LITERAL_CSTRING("\"" MSG_LINEBREAK "Content-Transfer-Encoding: 8bit" MSG_LINEBREAK));
            MimeWriteAString(obj, NS_LITERAL_CSTRING("Content-Disposition: inline; filename=\"Deleted: "));
            MimeWriteAString(obj, fileName);
            MimeWriteAString(obj, NS_LITERAL_CSTRING("\"" MSG_LINEBREAK "X-Mozilla-Altered: AttachmentDeleted; date=\""));
          }
          nsCString result;
          char timeBuffer[128];
          PRExplodedTime now;
          PR_ExplodeTime(PR_Now(), PR_LocalTimeParameters, &now);
          PR_FormatTimeUSEnglish(timeBuffer, sizeof(timeBuffer),
                                 "%a %b %d %H:%M:%S %Y",
                                 &now);
          MimeWriteAString(obj, nsDependentCString(timeBuffer));
          MimeWriteAString(obj, NS_LITERAL_CSTRING("\"" MSG_LINEBREAK));
          MimeWriteAString(obj, NS_LITERAL_CSTRING(MSG_LINEBREAK "You deleted an attachment from this message. The original MIME headers for the attachment were:" MSG_LINEBREAK));
          MimeHeaders_write_raw_headers(mult->hdrs, obj->options, false);
        }
        int32_t old_nchildren = container->nchildren;
        status = ((MimeMultipartClass *) obj->clazz)->create_child(obj);
        if (status < 0) return status;
        NS_ASSERTION(mult->state != MimeMultipartHeaders,
                     "mult->state shouldn't be MimeMultipartHeaders");

        if (!stripping && container->nchildren > old_nchildren && obj->options &&
            !mime_typep(obj, (MimeObjectClass*)&mimeMultipartAlternativeClass)) {
          // Notify emitter about content type and part path.
          MimeObject *kid = container->children[container->nchildren-1];
          MimeMultipart_notify_emitter(kid);
        }
      }
      break;
    }

    case MimeMultipartPartFirstLine:
      /* Hand this line off to the sub-part. */
      status = (((MimeMultipartClass *) obj->clazz)->parse_child_line(obj,
                                                  line, length, true));
      if (status < 0) return status;
      mult->state = MimeMultipartPartLine;
      break;

    case MimeMultipartPartLine:
      /* Hand this line off to the sub-part. */
      status = (((MimeMultipartClass *) obj->clazz)->parse_child_line(obj,
                  line, length, false));
      if (status < 0) return status;
      break;

    default:
      NS_ERROR("unexpected state in parse line");
      return -1;
  }

  if (obj->options &&
      obj->options->format_out == nsMimeOutput::nsMimeMessageAttach &&
      (!(obj->options->state && obj->options->state->strippingPart) &&
      mult->state != MimeMultipartPartLine))
      return MimeObject_write(obj, line, length, false);
  return 0;
}

void MimeMultipart_notify_emitter(MimeObject *obj)
{
  char *ct = nullptr;

  NS_ASSERTION(obj->options, "MimeMultipart_notify_emitter called with null options");
  if (! obj->options)
    return;

  ct = MimeHeaders_get(obj->headers, HEADER_CONTENT_TYPE,
                       false, false);
  if (obj->options->notify_nested_bodies) {
    mimeEmitterAddHeaderField(obj->options, HEADER_CONTENT_TYPE,
                              ct ? ct : TEXT_PLAIN);
    char *part_path = mime_part_address(obj);
    if (part_path) {
      mimeEmitterAddHeaderField(obj->options, "x-jsemitter-part-path",
                                part_path);
      PR_Free(part_path);
    }
  }

  // Examine the headers and see if there is a special charset
  // (i.e. non US-ASCII) for this message. If so, we need to
  // tell the emitter that this is the case for use in any
  // possible reply or forward operation.
  if (ct && (obj->options->notify_nested_bodies ||
             MimeObjectIsMessageBody(obj))) {
    char *cset = MimeHeaders_get_parameter(ct, "charset", NULL, NULL);
    if (cset) {
      mimeEmitterUpdateCharacterSet(obj->options, cset);
      if (!obj->options->override_charset)
        // Also set this charset to msgWindow
        SetMailCharacterSetToMsgWindow(obj, cset);
      PR_Free(cset);
    }
  }

  PR_FREEIF(ct);
}

static MimeMultipartBoundaryType
MimeMultipart_check_boundary(MimeObject *obj, const char *line, int32_t length)
{
  MimeMultipart *mult = (MimeMultipart *) obj;
  int32_t blen;
  bool term_p;

  if (!mult->boundary ||
    line[0] != '-' ||
    line[1] != '-')
  return MimeMultipartBoundaryTypeNone;

  /* This is a candidate line to be a boundary.  Check it out... */
  blen = strlen(mult->boundary);
  term_p = false;

  /* strip trailing whitespace (including the newline.) */
  while(length > 2 && IS_SPACE(line[length-1]))
  length--;

  /* Could this be a terminating boundary? */
  if (length == blen + 4 &&
    line[length-1] == '-' &&
    line[length-2] == '-')
  {
    term_p = true;
  }

  //looks like we have a separator but first, we need to check it's not for one of the part's children.
  MimeContainer *cont = (MimeContainer *) obj;
  if (cont->nchildren > 0)
  {
    MimeObject *kid = cont->children[cont->nchildren-1];
    if (kid)
      if (mime_typep(kid, (MimeObjectClass*) &mimeMultipartClass))
      {
        //Don't ask the kid to check the boundary if it has already detected a Teminator
        MimeMultipart *mult = (MimeMultipart *) kid;
        if (mult->state != MimeMultipartEpilogue)
          if (MimeMultipart_check_boundary(kid, line, length) != MimeMultipartBoundaryTypeNone)
            return MimeMultipartBoundaryTypeNone;
      }
  }

  if (term_p)
    length -= 2;

  if (blen == length-2 && !strncmp(line+2, mult->boundary, length-2))
    return (term_p
      ? MimeMultipartBoundaryTypeTerminator
      : MimeMultipartBoundaryTypeSeparator);
  else
    return MimeMultipartBoundaryTypeNone;
}


static int
MimeMultipart_create_child(MimeObject *obj)
{
  MimeMultipart *mult = (MimeMultipart *) obj;
  int           status;
  char *ct = (mult->hdrs
        ? MimeHeaders_get (mult->hdrs, HEADER_CONTENT_TYPE,
                 true, false)
        : 0);
  const char *dct = (((MimeMultipartClass *) obj->clazz)->default_part_type);
  MimeObject *body = NULL;

  mult->state = MimeMultipartPartFirstLine;
  if (obj->options)
    obj->options->is_child = true;

  /* Don't pass in NULL as the content-type (this means that the
   auto-uudecode-hack won't ever be done for subparts of a
   multipart, but only for untyped children of message/rfc822.
   */
  body = mime_create(((ct && *ct) ? ct : (dct ? dct: TEXT_PLAIN)),
           mult->hdrs, obj->options);
  PR_FREEIF(ct);
  if (!body) return MIME_OUT_OF_MEMORY;
  status = ((MimeContainerClass *) obj->clazz)->add_child(obj, body);
  if (status < 0)
  {
    mime_free(body);
    return status;
  }

#ifdef MIME_DRAFTS
  if ( obj->options && 
     obj->options->decompose_file_p &&
     obj->options->is_multipart_msg &&
     obj->options->decompose_file_init_fn )
  {
    if ( !mime_typep(obj,(MimeObjectClass*)&mimeMultipartRelatedClass) &&
           !mime_typep(obj,(MimeObjectClass*)&mimeMultipartAlternativeClass) &&
       !mime_typep(obj,(MimeObjectClass*)&mimeMultipartSignedClass) &&
#ifdef MIME_DETAIL_CHECK
       !mime_typep(body, (MimeObjectClass*)&mimeMultipartRelatedClass) &&
       !mime_typep(body, (MimeObjectClass*)&mimeMultipartAlternativeClass) &&
       !mime_typep(body,(MimeObjectClass*)&mimeMultipartSignedClass) 
#else
           /* bug 21869 -- due to the fact that we are not generating the
              correct mime class object for content-typ multipart/signed part
              the above check failed. to solve the problem in general and not
              to cause early temination when parsing message for opening as
              draft we can simply make sure that the child is not a multipart
              mime object. this way we could have a proper decomposing message
              part functions set correctly */
           !mime_typep(body, (MimeObjectClass*) &mimeMultipartClass)
#endif
    &&        ! (mime_typep(body, (MimeObjectClass*)&mimeExternalObjectClass) && !strcmp(body->content_type, "text/x-vcard"))
       )
    {
    status = obj->options->decompose_file_init_fn ( obj->options->stream_closure, mult->hdrs );
    if (status < 0) return status;
    }
  }
#endif /* MIME_DRAFTS */


  /* Now that we've added this new object to our list of children,
   start its parser going (if we want to display it.)
   */
  body->output_p = (((MimeMultipartClass *) obj->clazz)->output_child_p(obj, body));
  if (body->output_p)
  {  
    status = body->clazz->parse_begin(body);

#ifdef XP_MACOSX
    /* if we are saving an apple double attachment, we need to set correctly the conten type of the channel */
    if (mime_typep(obj, (MimeObjectClass *) &mimeMultipartAppleDoubleClass))
    {
      mime_stream_data *msd = (mime_stream_data *)body->options->stream_closure;
      if (!body->options->write_html_p && body->content_type && !PL_strcasecmp(body->content_type, APPLICATION_APPLEFILE))
      {
        if (msd && msd->channel)
          msd->channel->SetContentType(NS_LITERAL_CSTRING(APPLICATION_APPLEFILE));
      }
    }
#endif

    if (status < 0) return status;
  }

  return 0;
}


static bool
MimeMultipart_output_child_p(MimeObject *obj, MimeObject *child)
{
  /* We don't output a child if we're stripping it. */
  if (obj->options && obj->options->state && obj->options->state->strippingPart)
    return false;
  /* if we are saving an apple double attachment, ignore the appledouble wrapper part */
  return (obj->options && obj->options->write_html_p) ||
          PL_strcasecmp(child->content_type, MULTIPART_APPLEDOUBLE);
}



static int
MimeMultipart_close_child(MimeObject *object)
{
  MimeMultipart *mult = (MimeMultipart *) object;
  MimeContainer *cont = (MimeContainer *) object;

  if (!mult->hdrs)
  return 0;

  MimeHeaders_free(mult->hdrs);
  mult->hdrs = 0;

  NS_ASSERTION(cont->nchildren > 0, "badly formed mime message");
  if (cont->nchildren > 0)
  {
    MimeObject *kid = cont->children[cont->nchildren-1];
    // If we have a child and it has not already been closed, process it.
    // The kid would be already be closed if we encounter a multipart section
    // that did not have a fully delineated header block.  No header block means
    // no creation of a new child, but the termination case still happens and
    // we still end up here.  Obviously, we don't want to close the child a
    // second time and the best thing we can do is nothing.
    if (kid && !kid->closed_p)
    {
      int status;
      status = kid->clazz->parse_eof(kid, false);
      if (status < 0) return status;
      status = kid->clazz->parse_end(kid, false);
      if (status < 0) return status;

#ifdef MIME_DRAFTS
      if ( object->options &&
         object->options->decompose_file_p &&
         object->options->is_multipart_msg &&
         object->options->decompose_file_close_fn ) 
      {
        if ( !mime_typep(object,(MimeObjectClass*)&mimeMultipartRelatedClass) &&
           !mime_typep(object,(MimeObjectClass*)&mimeMultipartAlternativeClass) &&
           !mime_typep(object,(MimeObjectClass*)&mimeMultipartSignedClass) &&
#ifdef MIME_DETAIL_CHECK
           !mime_typep(kid,(MimeObjectClass*)&mimeMultipartRelatedClass) &&
           !mime_typep(kid,(MimeObjectClass*)&mimeMultipartAlternativeClass) &&
           !mime_typep(kid,(MimeObjectClass*)&mimeMultipartSignedClass) 
#else
                   /* bug 21869 -- due to the fact that we are not generating the
                      correct mime class object for content-typ multipart/signed part
                      the above check failed. to solve the problem in general and not
                      to cause early temination when parsing message for opening as
                      draft we can simply make sure that the child is not a multipart
                      mime object. this way we could have a proper decomposing message
                      part functions set correctly */
                   !mime_typep(kid,(MimeObjectClass*) &mimeMultipartClass)
#endif
                                  && !(mime_typep(kid, (MimeObjectClass*)&mimeExternalObjectClass) && !strcmp(kid->content_type, "text/x-vcard"))
           )
        {
          status = object->options->decompose_file_close_fn ( object->options->stream_closure );
          if (status < 0) return status;
        }
      }
#endif /* MIME_DRAFTS */

    }
  }
  return 0;
}


static int
MimeMultipart_parse_child_line (MimeObject *obj, const char *line, int32_t length,
                bool first_line_p)
{
  MimeContainer *cont = (MimeContainer *) obj;
  int status;
  MimeObject *kid;

  PR_ASSERT(cont->nchildren > 0);
  if (cont->nchildren <= 0)
  return -1;

  kid = cont->children[cont->nchildren-1];
  PR_ASSERT(kid);
  if (!kid) return -1;

#ifdef MIME_DRAFTS
  if ( obj->options &&
     obj->options->decompose_file_p &&
     obj->options->is_multipart_msg && 
     obj->options->decompose_file_output_fn ) 
  {
  if (!mime_typep(obj,(MimeObjectClass*)&mimeMultipartAlternativeClass) &&
    !mime_typep(obj,(MimeObjectClass*)&mimeMultipartRelatedClass) &&
    !mime_typep(obj,(MimeObjectClass*)&mimeMultipartSignedClass) &&
#ifdef MIME_DETAIL_CHECK
    !mime_typep(kid,(MimeObjectClass*)&mimeMultipartAlternativeClass) &&
    !mime_typep(kid,(MimeObjectClass*)&mimeMultipartRelatedClass) &&
    !mime_typep(kid,(MimeObjectClass*)&mimeMultipartSignedClass)
#else
        /* bug 21869 -- due to the fact that we are not generating the
           correct mime class object for content-typ multipart/signed part
           the above check failed. to solve the problem in general and not
           to cause early temination when parsing message for opening as
           draft we can simply make sure that the child is not a multipart
           mime object. this way we could have a proper decomposing message
           part functions set correctly */
        !mime_typep(kid, (MimeObjectClass*) &mimeMultipartClass)
#endif
    && !(mime_typep(kid, (MimeObjectClass*)&mimeExternalObjectClass) && !strcmp(kid->content_type, "text/x-vcard"))
    )
    return obj->options->decompose_file_output_fn (line, length, obj->options->stream_closure);
  }
#endif /* MIME_DRAFTS */

  /* The newline issues here are tricky, since both the newlines before
   and after the boundary string are to be considered part of the
   boundary: this is so that a part can be specified such that it
   does not end in a trailing newline.

   To implement this, we send a newline *before* each line instead
   of after, except for the first line, which is not preceeded by a
   newline.
   */

  /* Remove the trailing newline... */
  if (length > 0 && line[length-1] == '\n') length--;
  if (length > 0 && line[length-1] == '\r') length--;

  if (!first_line_p)
  {
    /* Push out a preceeding newline... */
    char nl[] = MSG_LINEBREAK;
    status = kid->clazz->parse_buffer (nl, MSG_LINEBREAK_LEN, kid);
    if (status < 0) return status;
  }

  /* Now push out the line sans trailing newline. */
  return kid->clazz->parse_buffer (line, length, kid);
}


static int
MimeMultipart_parse_eof (MimeObject *obj, bool abort_p)
{
  MimeMultipart *mult = (MimeMultipart *) obj;
  MimeContainer *cont = (MimeContainer *) obj;

  if (obj->closed_p) return 0;

  /* Push out the last trailing line if there's one in the buffer.  If
   this happens, this object does not end in a trailing newline (and
   the parse_line method will be called with a string with no trailing
   newline, which isn't the usual case.)
   */
  if (!abort_p && obj->ibuffer_fp > 0)
  {
    /* There is leftover data without a terminating newline. */
    int status = obj->clazz->parse_line(obj->ibuffer, obj->ibuffer_fp,obj);
    obj->ibuffer_fp = 0;
    if (status < 0)
    {
      obj->closed_p = true;
      return status;
    }
  }

  /* Now call parse_eof for our active child, if there is one.
   */
  if (cont->nchildren > 0 &&
    (mult->state == MimeMultipartPartLine ||
     mult->state == MimeMultipartPartFirstLine))
  {
    MimeObject *kid = cont->children[cont->nchildren-1];
    NS_ASSERTION(kid, "not expecting null kid");
    if (kid)
    {
      int status = kid->clazz->parse_eof(kid, abort_p);
      if (status < 0) return status;
    }
  }

  return ((MimeObjectClass*)&MIME_SUPERCLASS)->parse_eof(obj, abort_p);
}


#if defined(DEBUG) && defined(XP_UNIX)
static int
MimeMultipart_debug_print (MimeObject *obj, PRFileDesc *stream, int32_t depth)
{
  /*  MimeMultipart *mult = (MimeMultipart *) obj; */
  MimeContainer *cont = (MimeContainer *) obj;
  char *addr = mime_part_address(obj);
  int i;
  for (i=0; i < depth; i++)
  PR_Write(stream, "  ", 2);
/**
  fprintf(stream, "<%s %s (%d kid%s) boundary=%s 0x%08X>\n",
      obj->clazz->class_name,
      addr ? addr : "???",
      cont->nchildren, (cont->nchildren == 1 ? "" : "s"),
      (mult->boundary ? mult->boundary : "(none)"),
      (uint32_t) mult);
**/
  PR_FREEIF(addr);

/*
  if (cont->nchildren > 0)
  fprintf(stream, "\n");
 */

  for (i = 0; i < cont->nchildren; i++)
  {
    MimeObject *kid = cont->children[i];
    int status = kid->clazz->debug_print (kid, stream, depth+1);
    if (status < 0) return status;
  }

/*
  if (cont->nchildren > 0)
  fprintf(stream, "\n");
 */

  return 0;
}
#endif