src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto & The Claws Mail Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <stdio.h>
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #if HAVE_LOCALE_H
  32 #  include <locale.h>
  33 #endif
  34 #include <ctype.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <unistd.h>
  38 #include <errno.h>
  39
  40 #include "procmime.h"
  41 #include "procheader.h"
  42 #include "base64.h"
  43 #include "quoted-printable.h"
  44 #include "uuencode.h"
  45 #include "unmime.h"
  46 #include "html.h"
  47 #include "enriched.h"
  48 #include "codeconv.h"
  49 #include "utils.h"
  50 #include "prefs_common.h"
  51 #include "prefs_gtk.h"
  52 #include "alertpanel.h"
  53 #include "timing.h"
  54
  55 static GHashTable *procmime_get_mime_type_table (void);
  56 static MimeInfo *procmime_scan_file_short(const gchar *filename);
  57 static MimeInfo *procmime_scan_queue_file_short(const gchar *filename);
  58 static MimeInfo *procmime_scan_queue_file_full(const gchar *filename, gboolean short_scan);
  59
  60 MimeInfo *procmime_mimeinfo_new(void)
  61 {
  62         MimeInfo *mimeinfo;
  63
  64         mimeinfo = g_new0(MimeInfo, 1);
  65         mimeinfo->content        = MIMECONTENT_EMPTY;
  66         mimeinfo->data.filename  = NULL;
  67
  68         mimeinfo->type           = MIMETYPE_UNKNOWN;
  69         mimeinfo->encoding_type  = ENC_UNKNOWN;
  70         mimeinfo->typeparameters = g_hash_table_new(g_str_hash, g_str_equal);
  71
  72         mimeinfo->disposition    = DISPOSITIONTYPE_UNKNOWN;
  73         mimeinfo->dispositionparameters
  74                                  = g_hash_table_new(g_str_hash, g_str_equal);
  75
  76         mimeinfo->node           = g_node_new(mimeinfo);
  77
  78         return mimeinfo;
  79 }
  80
  81 static gboolean procmime_mimeinfo_parameters_destroy(gpointer key, gpointer value, gpointer user_data)
  82 {
  83         g_free(key);
  84         g_free(value);
  85
  86         return TRUE;
  87 }
  88
  89 static gchar *forced_charset = NULL;
  90
  91 void procmime_force_charset(const gchar *str)
  92 {
  93         g_free(forced_charset);
  94         forced_charset = NULL;
  95         if (str)
  96                 forced_charset = g_strdup(str);
  97 }
  98
  99 static EncodingType forced_encoding = 0;
 100
 101 void procmime_force_encoding(EncodingType encoding)
 102 {
 103         forced_encoding = encoding;
 104 }
 105
 106 static gboolean free_func(GNode *node, gpointer data)
 107 {
 108         MimeInfo *mimeinfo = (MimeInfo *) node->data;
 109
 110         switch (mimeinfo->content) {
 111         case MIMECONTENT_FILE:
 112                 if (mimeinfo->tmp)
 113                         claws_unlink(mimeinfo->data.filename);
 114                 g_free(mimeinfo->data.filename);
 115                 break;
 116
 117         case MIMECONTENT_MEM:
 118                 if (mimeinfo->tmp)
 119                         g_free(mimeinfo->data.mem);
 120         default:
 121                 break;
 122         }
 123
 124         g_free(mimeinfo->subtype);
 125         g_free(mimeinfo->description);
 126         g_free(mimeinfo->id);
 127         g_free(mimeinfo->location);
 128
 129         g_hash_table_foreach_remove(mimeinfo->typeparameters,
 130                 procmime_mimeinfo_parameters_destroy, NULL);
 131         g_hash_table_destroy(mimeinfo->typeparameters);
 132         g_hash_table_foreach_remove(mimeinfo->dispositionparameters,
 133                 procmime_mimeinfo_parameters_destroy, NULL);
 134         g_hash_table_destroy(mimeinfo->dispositionparameters);
 135
 136         if (mimeinfo->privacy)
 137                 privacy_free_privacydata(mimeinfo->privacy);
 138
 139         g_free(mimeinfo);
 140
 141         return FALSE;
 142 }
 143
 144 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
 145 {
 146         GNode *node;
 147
 148         if (!mimeinfo)
 149                 return;
 150
 151         node = mimeinfo->node;
 152         g_node_traverse(node, G_IN_ORDER, G_TRAVERSE_ALL, -1, free_func, NULL);
 153
 154         g_node_destroy(node);
 155 }
 156
 157 MimeInfo *procmime_mimeinfo_parent(MimeInfo *mimeinfo)
 158 {
 159         g_return_val_if_fail(mimeinfo != NULL, NULL);
 160         g_return_val_if_fail(mimeinfo->node != NULL, NULL);
 161
 162         if (mimeinfo->node->parent == NULL)
 163                 return NULL;
 164         return (MimeInfo *) mimeinfo->node->parent->data;
 165 }
 166
 167 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 168 {
 169         g_return_val_if_fail(mimeinfo != NULL, NULL);
 170         g_return_val_if_fail(mimeinfo->node != NULL, NULL);
 171
 172         if (mimeinfo->node->children)
 173                 return (MimeInfo *) mimeinfo->node->children->data;
 174         if (mimeinfo->node->next)
 175                 return (MimeInfo *) mimeinfo->node->next->data;
 176
 177         if (mimeinfo->node->parent == NULL)
 178                 return NULL;
 179
 180         while (mimeinfo->node->parent != NULL) {
 181                 mimeinfo = (MimeInfo *) mimeinfo->node->parent->data;
 182                 if (mimeinfo->node->next)
 183                         return (MimeInfo *) mimeinfo->node->next->data;
 184         }
 185
 186         return NULL;
 187 }
 188
 189 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 190 {
 191         gchar *filename;
 192         MimeInfo *mimeinfo;
 193         START_TIMING("");
 194         filename = procmsg_get_message_file_path(msginfo);
 195         if (!filename || !is_file_exist(filename)) {
 196                 g_free(filename);
 197                 return NULL;
 198         }
 199
 200         if (!folder_has_parent_of_type(msginfo->folder, F_QUEUE) &&
 201             !folder_has_parent_of_type(msginfo->folder, F_DRAFT))
 202                 mimeinfo = procmime_scan_file(filename);
 203         else
 204                 mimeinfo = procmime_scan_queue_file(filename);
 205         g_free(filename);
 206
 207         END_TIMING();
 208         return mimeinfo;
 209 }
 210
 211 MimeInfo *procmime_scan_message_short(MsgInfo *msginfo)
 212 {
 213         gchar *filename;
 214         MimeInfo *mimeinfo;
 215
 216         filename = procmsg_get_message_file_path(msginfo);
 217         if (!filename || !is_file_exist(filename)) {
 218                 g_free(filename);
 219                 return NULL;
 220         }
 221
 222         if (!folder_has_parent_of_type(msginfo->folder, F_QUEUE) &&
 223             !folder_has_parent_of_type(msginfo->folder, F_DRAFT))
 224                 mimeinfo = procmime_scan_file_short(filename);
 225         else
 226                 mimeinfo = procmime_scan_queue_file_short(filename);
 227         g_free(filename);
 228
 229         return mimeinfo;
 230 }
 231
 232 enum
 233 {
 234         H_CONTENT_TRANSFER_ENCODING = 0,
 235         H_CONTENT_TYPE              = 1,
 236         H_CONTENT_DISPOSITION       = 2,
 237         H_CONTENT_DESCRIPTION       = 3,
 238         H_SUBJECT                   = 4
 239 };
 240
 241 const gchar *procmime_mimeinfo_get_parameter(MimeInfo *mimeinfo, const gchar *name)
 242 {
 243         const gchar *value;
 244
 245         g_return_val_if_fail(mimeinfo != NULL, NULL);
 246         g_return_val_if_fail(name != NULL, NULL);
 247
 248         value = g_hash_table_lookup(mimeinfo->dispositionparameters, name);
 249         if (value == NULL)
 250                 value = g_hash_table_lookup(mimeinfo->typeparameters, name);
 251
 252         return value;
 253 }
 254
 255 #define FLUSH_LASTLINE() {                                                      \
 256         if (*lastline != '\0') {                                                \
 257                 gint llen = 0;                                                  \
 258                 strretchomp(lastline);                                          \
 259                 llen = strlen(lastline);                                        \
 260                 if (lastline[llen-1] == ' ' && strcmp(lastline,"-- ")) {        \
 261                         /* this is flowed */                                    \
 262                         if (delsp)                                              \
 263                                 lastline[llen-1] = '\0';                        \
 264                         if (fputs(lastline, outfp) == EOF)                      \
 265                                 err = TRUE;                                     \
 266                 } else {                                                        \
 267                         if (fputs(lastline, outfp) == EOF)                      \
 268                                 err = TRUE;                                     \
 269                         if (fputs("\n", outfp) == EOF)                          \
 270                                 err = TRUE;                                     \
 271                 }                                                               \
 272         }                                                                       \
 273         strcpy(lastline, buf);                                                  \
 274 }
 275
 276 gboolean procmime_decode_content(MimeInfo *mimeinfo)
 277 {
 278         gchar buf[BUFFSIZE];
 279         gint readend;
 280         gchar *tmpfilename;
 281         FILE *outfp, *infp;
 282         struct stat statbuf;
 283         gboolean tmp_file = FALSE;
 284         gboolean flowed = FALSE;
 285         gboolean delsp = FALSE;
 286         gboolean err = FALSE;
 287
 288         EncodingType encoding = forced_encoding
 289                                 ? forced_encoding
 290                                 : mimeinfo->encoding_type;
 291         gchar lastline[BUFFSIZE];
 292         memset(lastline, 0, BUFFSIZE);
 293
 294         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 295
 296         if (prefs_common.respect_flowed_format &&
 297             mimeinfo->type == MIMETYPE_TEXT &&
 298             !strcasecmp(mimeinfo->subtype, "plain")) {
 299                 if (procmime_mimeinfo_get_parameter(mimeinfo, "format") != NULL &&
 300                     !strcasecmp(procmime_mimeinfo_get_parameter(mimeinfo, "format"),"flowed"))
 301                         flowed = TRUE;
 302                 if (flowed &&
 303                     procmime_mimeinfo_get_parameter(mimeinfo, "delsp") != NULL &&
 304                     !strcasecmp(procmime_mimeinfo_get_parameter(mimeinfo, "delsp"),"yes"))
 305                         delsp = TRUE;
 306         }
 307
 308         if (!flowed && (
 309              encoding == ENC_UNKNOWN ||
 310              encoding == ENC_BINARY ||
 311              encoding == ENC_7BIT ||
 312              encoding == ENC_8BIT
 313             ))
 314                 return TRUE;
 315
 316         infp = g_fopen(mimeinfo->data.filename, "rb");
 317         if (!infp) {
 318                 perror("fopen");
 319                 return FALSE;
 320         }
 321         fseek(infp, mimeinfo->offset, SEEK_SET);
 322
 323         outfp = get_tmpfile_in_dir(get_mime_tmp_dir(), &tmpfilename);
 324         if (!outfp) {
 325                 perror("tmpfile");
 326                 fclose(infp);
 327                 return FALSE;
 328         }
 329         tmp_file = TRUE;
 330         readend = mimeinfo->offset + mimeinfo->length;
 331
 332         if (encoding == ENC_QUOTED_PRINTABLE) {
 333                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 334                         gint len;
 335                         len = qp_decode_line(buf);
 336                         buf[len]='\0';
 337                         if (!flowed) {
 338                                 if (fwrite(buf, 1, len, outfp) < len)
 339                                         err = TRUE;
 340                         } else {
 341                                 FLUSH_LASTLINE();
 342                         }
 343                 }
 344                 if (flowed)
 345                         FLUSH_LASTLINE();
 346         } else if (encoding == ENC_BASE64) {
 347                 gchar outbuf[BUFFSIZE];
 348                 gint len;
 349                 Base64Decoder *decoder;
 350                 gboolean got_error = FALSE;
 351                 gboolean uncanonicalize = FALSE;
 352                 FILE *tmpfp = outfp;
 353
 354                 if (mimeinfo->type == MIMETYPE_TEXT ||
 355                     mimeinfo->type == MIMETYPE_MESSAGE) {
 356                         uncanonicalize = TRUE;
 357                         tmpfp = my_tmpfile();
 358                         if (!tmpfp) {
 359                                 perror("tmpfile");
 360                                 if (tmp_file) fclose(outfp);
 361                                 fclose(infp);
 362                                 return FALSE;
 363                         }
 364                 }
 365
 366                 decoder = base64_decoder_new();
 367                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 368                         len = base64_decoder_decode(decoder, buf, outbuf);
 369                         if (len < 0 && !got_error) {
 370                                 g_warning("Bad BASE64 content.\n");
 371                                 if (fwrite(_("[Error decoding BASE64]\n"),
 372                                         sizeof(gchar),
 373                                         strlen(_("[Error decoding BASE64]\n")),
 374                                         tmpfp) < strlen(_("[Error decoding BASE64]\n")))
 375                                         g_warning("error decoding BASE64");
 376                                 got_error = TRUE;
 377                                 continue;
 378                         } else if (len >= 0) {
 379                                 /* print out the error message only once
 380                                  * per block */
 381                                 if (fwrite(outbuf, sizeof(gchar), len, tmpfp) < len)
 382                                         err = TRUE;
 383                                 got_error = FALSE;
 384                         }
 385                 }
 386                 base64_decoder_free(decoder);
 387
 388                 if (uncanonicalize) {
 389                         rewind(tmpfp);
 390                         while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 391                                 strcrchomp(buf);
 392                                 if (fputs(buf, outfp) == EOF)
 393                                         err = TRUE;
 394                         }
 395                         fclose(tmpfp);
 396                 }
 397         } else if (encoding == ENC_X_UUENCODE) {
 398                 gchar outbuf[BUFFSIZE];
 399                 gint len;
 400                 gboolean flag = FALSE;
 401
 402                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 403                         if (!flag && strncmp(buf,"begin ", 6)) continue;
 404
 405                         if (flag) {
 406                                 len = fromuutobits(outbuf, buf);
 407                                 if (len <= 0) {
 408                                         if (len < 0)
 409                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 410                                         break;
 411                                 }
 412                                 if (fwrite(outbuf, sizeof(gchar), len, outfp) < len)
 413                                         err = TRUE;
 414                         } else
 415                                 flag = TRUE;
 416                 }
 417         } else {
 418                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 419                         if (!flowed) {
 420                                 if (fputs(buf, outfp) == EOF)
 421                                         err = TRUE;
 422                         } else {
 423                                 FLUSH_LASTLINE();
 424                         }
 425                 }
 426                 if (flowed)
 427                         FLUSH_LASTLINE();
 428                 if (err == TRUE)
 429                         g_warning("write error");
 430         }
 431
 432         fclose(outfp);
 433         fclose(infp);
 434
 435         if (err == TRUE) {
 436                 return FALSE;
 437         }
 438
 439         g_stat(tmpfilename, &statbuf);
 440         if (mimeinfo->tmp && (mimeinfo->data.filename != NULL))
 441                 claws_unlink(mimeinfo->data.filename);
 442         g_free(mimeinfo->data.filename);
 443         mimeinfo->data.filename = tmpfilename;
 444         mimeinfo->tmp = TRUE;
 445         mimeinfo->offset = 0;
 446         mimeinfo->length = statbuf.st_size;
 447         mimeinfo->encoding_type = ENC_BINARY;
 448
 449         return TRUE;
 450 }
 451
 452 #define B64_LINE_SIZE           57
 453 #define B64_BUFFSIZE            77
 454
 455 gboolean procmime_encode_content(MimeInfo *mimeinfo, EncodingType encoding)
 456 {
 457         FILE *infp = NULL, *outfp;
 458         gint len;
 459         gchar *tmpfilename;
 460         struct stat statbuf;
 461         gboolean err = FALSE;
 462
 463         if (mimeinfo->content == MIMECONTENT_EMPTY)
 464                 return TRUE;
 465
 466         if (mimeinfo->encoding_type != ENC_UNKNOWN &&
 467             mimeinfo->encoding_type != ENC_BINARY &&
 468             mimeinfo->encoding_type != ENC_7BIT &&
 469             mimeinfo->encoding_type != ENC_8BIT)
 470                 if(!procmime_decode_content(mimeinfo))
 471                         return FALSE;
 472
 473         outfp = get_tmpfile_in_dir(get_mime_tmp_dir(), &tmpfilename);
 474         if (!outfp) {
 475                 perror("tmpfile");
 476                 return FALSE;
 477         }
 478
 479         if (mimeinfo->content == MIMECONTENT_FILE) {
 480                 if ((infp = g_fopen(mimeinfo->data.filename, "rb")) == NULL) {
 481                         g_warning("Can't open file %s\n", mimeinfo->data.filename);
 482                         return FALSE;
 483                 }
 484         } else if (mimeinfo->content == MIMECONTENT_MEM) {
 485                 infp = str_open_as_stream(mimeinfo->data.mem);
 486                 if (infp == NULL)
 487                         return FALSE;
 488         }
 489
 490         if (encoding == ENC_BASE64) {
 491                 gchar inbuf[B64_LINE_SIZE], outbuf[B64_BUFFSIZE];
 492                 FILE *tmp_fp = infp;
 493                 gchar *tmp_file = NULL;
 494
 495                 if (mimeinfo->type == MIMETYPE_TEXT ||
 496                      mimeinfo->type == MIMETYPE_MESSAGE) {
 497                         if (mimeinfo->content == MIMECONTENT_FILE) {
 498                                 tmp_file = get_tmp_file();
 499                                 if (canonicalize_file(mimeinfo->data.filename, tmp_file) < 0) {
 500                                         g_free(tmp_file);
 501                                         fclose(infp);
 502                                         return FALSE;
 503                                 }
 504                                 if ((tmp_fp = g_fopen(tmp_file, "rb")) == NULL) {
 505                                         FILE_OP_ERROR(tmp_file, "fopen");
 506                                         claws_unlink(tmp_file);
 507                                         g_free(tmp_file);
 508                                         fclose(infp);
 509                                         return FALSE;
 510                                 }
 511                         } else {
 512                                 gchar *out = canonicalize_str(mimeinfo->data.mem);
 513                                 fclose(infp);
 514                                 infp = str_open_as_stream(out);
 515                                 tmp_fp = infp;
 516                                 g_free(out);
 517                                 if (infp == NULL)
 518                                         return FALSE;
 519                         }
 520                 }
 521
 522                 while ((len = fread(inbuf, sizeof(gchar),
 523                                     B64_LINE_SIZE, tmp_fp))
 524                        == B64_LINE_SIZE) {
 525                         base64_encode(outbuf, inbuf, B64_LINE_SIZE);
 526                         if (fputs(outbuf, outfp) == EOF)
 527                                 err = TRUE;
 528                         if (fputc('\n', outfp) == EOF)
 529                                 err = TRUE;
 530                 }
 531                 if (len > 0 && feof(tmp_fp)) {
 532                         base64_encode(outbuf, inbuf, len);
 533                         if (fputs(outbuf, outfp) == EOF)
 534                                 err = TRUE;
 535                         if (fputc('\n', outfp) == EOF)
 536                                 err = TRUE;
 537                 }
 538
 539                 if (tmp_file) {
 540                         fclose(tmp_fp);
 541                         claws_unlink(tmp_file);
 542                         g_free(tmp_file);
 543                 }
 544         } else if (encoding == ENC_QUOTED_PRINTABLE) {
 545                 gchar inbuf[BUFFSIZE], outbuf[BUFFSIZE * 4];
 546
 547                 while (fgets(inbuf, sizeof(inbuf), infp) != NULL) {
 548                         qp_encode_line(outbuf, inbuf);
 549
 550                         if (!strncmp("From ", outbuf, sizeof("From ")-1)) {
 551                                 gchar *tmpbuf = outbuf;
 552
 553                                 tmpbuf += sizeof("From ")-1;
 554
 555                                 if (fputs("=46rom ", outfp) == EOF)
 556                                         err = TRUE;
 557                                 if (fputs(tmpbuf, outfp) == EOF)
 558                                         err = TRUE;
 559                         } else {
 560                                 if (fputs(outbuf, outfp) == EOF)
 561                                         err = TRUE;
 562                         }
 563                 }
 564         } else {
 565                 gchar buf[BUFFSIZE];
 566
 567                 while (fgets(buf, sizeof(buf), infp) != NULL) {
 568                         strcrchomp(buf);
 569                         if (fputs(buf, outfp) == EOF)
 570                                 err = TRUE;
 571                 }
 572         }
 573
 574         fclose(outfp);
 575         fclose(infp);
 576
 577         if (err == TRUE)
 578                 return FALSE;
 579
 580         if (mimeinfo->content == MIMECONTENT_FILE) {
 581                 if (mimeinfo->tmp && (mimeinfo->data.filename != NULL))
 582                         claws_unlink(mimeinfo->data.filename);
 583                 g_free(mimeinfo->data.filename);
 584         } else if (mimeinfo->content == MIMECONTENT_MEM) {
 585                 if (mimeinfo->tmp && (mimeinfo->data.mem != NULL))
 586                         g_free(mimeinfo->data.mem);
 587         }
 588
 589         g_stat(tmpfilename, &statbuf);
 590         mimeinfo->content = MIMECONTENT_FILE;
 591         mimeinfo->data.filename = tmpfilename;
 592         mimeinfo->tmp = TRUE;
 593         mimeinfo->offset = 0;
 594         mimeinfo->length = statbuf.st_size;
 595         mimeinfo->encoding_type = encoding;
 596
 597         return TRUE;
 598 }
 599
 600 gint procmime_get_part(const gchar *outfile, MimeInfo *mimeinfo)
 601 {
 602         FILE *infp, *outfp;
 603         gchar buf[BUFFSIZE];
 604         gint restlength, readlength;
 605         gint saved_errno = 0;
 606
 607         g_return_val_if_fail(outfile != NULL, -1);
 608         g_return_val_if_fail(mimeinfo != NULL, -1);
 609
 610         if (mimeinfo->encoding_type != ENC_BINARY && !procmime_decode_content(mimeinfo))
 611                 return -EINVAL;
 612
 613         if ((infp = g_fopen(mimeinfo->data.filename, "rb")) == NULL) {
 614                 saved_errno = errno;
 615                 FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
 616                 return -(saved_errno);
 617         }
 618         if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
 619                 saved_errno = errno;
 620                 FILE_OP_ERROR(mimeinfo->data.filename, "fseek");
 621                 fclose(infp);
 622                 return -(saved_errno);
 623         }
 624         if ((outfp = g_fopen(outfile, "wb")) == NULL) {
 625                 saved_errno = errno;
 626                 FILE_OP_ERROR(outfile, "fopen");
 627                 fclose(infp);
 628                 return -(saved_errno);
 629         }
 630
 631         restlength = mimeinfo->length;
 632
 633         while ((restlength > 0) && ((readlength = fread(buf, 1, restlength > BUFFSIZE ? BUFFSIZE : restlength, infp)) > 0)) {
 634                 if (fwrite(buf, 1, readlength, outfp) != readlength) {
 635                         saved_errno = errno;
 636                         fclose(outfp);
 637                         return -(saved_errno);
 638                 }
 639                 restlength -= readlength;
 640         }
 641
 642         fclose(infp);
 643         if (fclose(outfp) == EOF) {
 644                 saved_errno = errno;
 645                 FILE_OP_ERROR(outfile, "fclose");
 646                 claws_unlink(outfile);
 647                 return -(saved_errno);
 648         }
 649
 650         return 0;
 651 }
 652
 653 static FILE *procmime_get_text_content(MimeInfo *mimeinfo)
 654 {
 655         FILE *tmpfp, *outfp;
 656         const gchar *src_codeset;
 657         gboolean conv_fail = FALSE;
 658         gchar buf[BUFFSIZE];
 659         gchar *str;
 660         gchar *tmpfile;
 661         gboolean err = FALSE;
 662
 663         g_return_val_if_fail(mimeinfo != NULL, NULL);
 664
 665         if (!procmime_decode_content(mimeinfo))
 666                 return NULL;
 667
 668         tmpfile = procmime_get_tmp_file_name(mimeinfo);
 669         if (tmpfile == NULL)
 670                 return NULL;
 671
 672         if (procmime_get_part(tmpfile, mimeinfo) < 0) {
 673                 g_free(tmpfile);
 674                 return NULL;
 675         }
 676
 677         tmpfp = g_fopen(tmpfile, "rb");
 678         if (tmpfp == NULL) {
 679                 g_free(tmpfile);
 680                 return NULL;
 681         }
 682
 683         if ((outfp = my_tmpfile()) == NULL) {
 684                 perror("tmpfile");
 685                 fclose(tmpfp);
 686                 g_free(tmpfile);
 687                 return NULL;
 688         }
 689
 690         src_codeset = forced_charset
 691                       ? forced_charset :
 692                       procmime_mimeinfo_get_parameter(mimeinfo, "charset");
 693
 694         if (!forced_charset && src_codeset && !strcasecmp(src_codeset, CS_ISO_8859_1))
 695                 src_codeset = CS_WINDOWS_1252;
 696
 697         if (mimeinfo->type == MIMETYPE_TEXT && !g_ascii_strcasecmp(mimeinfo->subtype, "html")) {
 698                 SC_HTMLParser *parser;
 699                 CodeConverter *conv;
 700
 701                 conv = conv_code_converter_new(src_codeset);
 702                 parser = sc_html_parser_new(tmpfp, conv);
 703                 while ((str = sc_html_parse(parser)) != NULL) {
 704                         if (fputs(str, outfp) == EOF)
 705                                 err = TRUE;
 706                 }
 707                 sc_html_parser_destroy(parser);
 708                 conv_code_converter_destroy(conv);
 709         } else if (mimeinfo->type == MIMETYPE_TEXT && !g_ascii_strcasecmp(mimeinfo->subtype, "enriched")) {
 710                 ERTFParser *parser;
 711                 CodeConverter *conv;
 712
 713                 conv = conv_code_converter_new(src_codeset);
 714                 parser = ertf_parser_new(tmpfp, conv);
 715                 while ((str = ertf_parse(parser)) != NULL) {
 716                         if (fputs(str, outfp) == EOF)
 717                                 err = TRUE;
 718                 }
 719                 ertf_parser_destroy(parser);
 720                 conv_code_converter_destroy(conv);
 721         } else if (mimeinfo->type == MIMETYPE_TEXT) {
 722                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 723                         str = conv_codeset_strdup(buf, src_codeset, CS_UTF_8);
 724                         if (str) {
 725                                 if (fputs(str, outfp) == EOF)
 726                                         err = TRUE;
 727                                 g_free(str);
 728                         } else {
 729                                 conv_fail = TRUE;
 730                                 if (fputs(buf, outfp) == EOF)
 731                                         err = TRUE;
 732                         }
 733                 }
 734         }
 735
 736         if (conv_fail)
 737                 g_warning("procmime_get_text_content(): Code conversion failed.\n");
 738
 739         fclose(tmpfp);
 740         rewind(outfp);
 741         claws_unlink(tmpfile);
 742         g_free(tmpfile);
 743
 744         if (err == TRUE) {
 745                 fclose(outfp);
 746                 return NULL;
 747         }
 748
 749         return outfp;
 750 }
 751
 752 /* search the first text part of (multipart) MIME message,
 753    decode, convert it and output to outfp. */
 754 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 755 {
 756         FILE *outfp = NULL;
 757         MimeInfo *mimeinfo, *partinfo;
 758         gboolean empty_ok = FALSE, short_scan = TRUE;
 759         START_TIMING("");
 760         g_return_val_if_fail(msginfo != NULL, NULL);
 761
 762         /* first we try to short-scan (for speed), refusing empty parts */
 763 scan_again:
 764         if (short_scan)
 765                 mimeinfo = procmime_scan_message_short(msginfo);
 766         else
 767                 mimeinfo = procmime_scan_message(msginfo);
 768         if (!mimeinfo) return NULL;
 769
 770         partinfo = mimeinfo;
 771         while (partinfo && (partinfo->type != MIMETYPE_TEXT ||
 772                (partinfo->length == 0 && !empty_ok))) {
 773                 partinfo = procmime_mimeinfo_next(partinfo);
 774         }
 775         if (partinfo)
 776                 outfp = procmime_get_text_content(partinfo);
 777         else if (!empty_ok && short_scan) {
 778                 /* if short scan didn't find a non-empty part, rescan
 779                  * fully for non-empty parts
 780                  */
 781                 short_scan = FALSE;
 782                 procmime_mimeinfo_free_all(mimeinfo);
 783                 goto scan_again;
 784         } else if (!empty_ok && !short_scan) {
 785                 /* if full scan didn't find a non-empty part, rescan
 786                  * accepting empty parts
 787                  */
 788                 empty_ok = TRUE;
 789                 procmime_mimeinfo_free_all(mimeinfo);
 790                 goto scan_again;
 791         }
 792         procmime_mimeinfo_free_all(mimeinfo);
 793         END_TIMING();
 794         return outfp;
 795 }
 796
 797
 798 static gboolean find_encrypted_func(GNode *node, gpointer data)
 799 {
 800         MimeInfo *mimeinfo = (MimeInfo *) node->data;
 801         MimeInfo **encinfo = (MimeInfo **) data;
 802
 803         if (privacy_mimeinfo_is_encrypted(mimeinfo)) {
 804                 *encinfo = mimeinfo;
 805                 return TRUE;
 806         }
 807
 808         return FALSE;
 809 }
 810
 811 static MimeInfo *find_encrypted_part(MimeInfo *rootinfo)
 812 {
 813         MimeInfo *encinfo = NULL;
 814
 815         g_node_traverse(rootinfo->node, G_IN_ORDER, G_TRAVERSE_ALL, -1,
 816                 find_encrypted_func, &encinfo);
 817
 818         return encinfo;
 819 }
 820
 821 /* search the first encrypted text part of (multipart) MIME message,
 822    decode, convert it and output to outfp. */
 823 FILE *procmime_get_first_encrypted_text_content(MsgInfo *msginfo)
 824 {
 825         FILE *outfp = NULL;
 826         MimeInfo *mimeinfo, *partinfo, *encinfo;
 827
 828         g_return_val_if_fail(msginfo != NULL, NULL);
 829
 830         mimeinfo = procmime_scan_message(msginfo);
 831         if (!mimeinfo) {
 832                 return NULL;
 833         }
 834
 835         partinfo = mimeinfo;
 836         if ((encinfo = find_encrypted_part(partinfo)) != NULL) {
 837                 debug_print("decrypting message part\n");
 838                 if (privacy_mimeinfo_decrypt(encinfo) < 0) {
 839                         alertpanel_error(_("Couldn't decrypt: %s"),
 840                                 privacy_get_error());
 841                         return NULL;
 842                 }
 843         }
 844         partinfo = mimeinfo;
 845         while (partinfo && partinfo->type != MIMETYPE_TEXT) {
 846                 partinfo = procmime_mimeinfo_next(partinfo);
 847                 if (privacy_mimeinfo_is_signed(partinfo))
 848                         procmsg_msginfo_set_flags(msginfo, 0, MSG_SIGNED);
 849         }
 850
 851         if (partinfo)
 852                 outfp = procmime_get_text_content(partinfo);
 853
 854         procmime_mimeinfo_free_all(mimeinfo);
 855
 856         return outfp;
 857 }
 858
 859 gboolean procmime_msginfo_is_encrypted(MsgInfo *msginfo)
 860 {
 861         MimeInfo *mimeinfo, *partinfo;
 862         gboolean result = FALSE;
 863
 864         g_return_val_if_fail(msginfo != NULL, FALSE);
 865
 866         mimeinfo = procmime_scan_message(msginfo);
 867         if (!mimeinfo) {
 868                 return FALSE;
 869         }
 870
 871         partinfo = mimeinfo;
 872         result = (find_encrypted_part(partinfo) != NULL);
 873         procmime_mimeinfo_free_all(mimeinfo);
 874
 875         return result;
 876 }
 877
 878 static gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 879                                    const gchar *str, StrFindFunc find_func)
 880 {
 881         FILE *outfp;
 882         gchar buf[BUFFSIZE];
 883
 884         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 885         g_return_val_if_fail(mimeinfo->type == MIMETYPE_TEXT, FALSE);
 886         g_return_val_if_fail(str != NULL, FALSE);
 887         g_return_val_if_fail(find_func != NULL, FALSE);
 888
 889         outfp = procmime_get_text_content(mimeinfo);
 890
 891         if (!outfp)
 892                 return FALSE;
 893
 894         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 895                 strretchomp(buf);
 896                 if (find_func(buf, str)) {
 897                         fclose(outfp);
 898                         return TRUE;
 899                 }
 900         }
 901
 902         fclose(outfp);
 903
 904         return FALSE;
 905 }
 906
 907 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
 908                               StrFindFunc find_func)
 909 {
 910         MimeInfo *mimeinfo;
 911         MimeInfo *partinfo;
 912         gchar *filename;
 913         gboolean found = FALSE;
 914
 915         g_return_val_if_fail(msginfo != NULL, FALSE);
 916         g_return_val_if_fail(str != NULL, FALSE);
 917         g_return_val_if_fail(find_func != NULL, FALSE);
 918
 919         filename = procmsg_get_message_file(msginfo);
 920         if (!filename) return FALSE;
 921         mimeinfo = procmime_scan_message(msginfo);
 922
 923         for (partinfo = mimeinfo; partinfo != NULL;
 924              partinfo = procmime_mimeinfo_next(partinfo)) {
 925                 if (partinfo->type == MIMETYPE_TEXT) {
 926                         if (procmime_find_string_part
 927                                 (partinfo, filename, str, find_func) == TRUE) {
 928                                 found = TRUE;
 929                                 break;
 930                         }
 931                 }
 932         }
 933
 934         procmime_mimeinfo_free_all(mimeinfo);
 935         g_free(filename);
 936
 937         return found;
 938 }
 939
 940 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
 941 {
 942         static guint32 id = 0;
 943         gchar *base;
 944         gchar *filename;
 945         gchar f_prefix[10];
 946
 947         g_return_val_if_fail(mimeinfo != NULL, NULL);
 948
 949         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
 950
 951         if ((mimeinfo->type == MIMETYPE_TEXT) && !g_ascii_strcasecmp(mimeinfo->subtype, "html"))
 952                 base = g_strdup("mimetmp.html");
 953         else {
 954                 const gchar *basetmp;
 955
 956                 basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "filename");
 957                 if (basetmp == NULL)
 958                         basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "name");
 959                 if (basetmp == NULL)
 960                         basetmp = "mimetmp";
 961                 basetmp = g_path_get_basename(basetmp);
 962                 if (*basetmp == '\0')
 963                         basetmp = g_strdup("mimetmp");
 964                 base = conv_filename_from_utf8(basetmp);
 965                 g_free((gchar*)basetmp);
 966                 subst_for_shellsafe_filename(base);
 967         }
 968
 969         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 970                                f_prefix, base, NULL);
 971
 972         g_free(base);
 973
 974         return filename;
 975 }
 976
 977 static GList *mime_type_list = NULL;
 978
 979 gchar *procmime_get_mime_type(const gchar *filename)
 980 {
 981         const gchar *p;
 982         gchar *ext = NULL;
 983         gchar *base;
 984 #ifndef G_OS_WIN32
 985         static GHashTable *mime_type_table = NULL;
 986         MimeType *mime_type;
 987
 988         if (!mime_type_table) {
 989                 mime_type_table = procmime_get_mime_type_table();
 990                 if (!mime_type_table) return NULL;
 991         }
 992 #endif
 993
 994         if (filename == NULL)
 995                 return NULL;
 996
 997         base = g_path_get_basename(filename);
 998         if ((p = strrchr(base, '.')) != NULL)
 999                 ext = g_utf8_strdown(p + 1, -1);
1000         g_free(base);
1001
1002 #ifndef G_OS_WIN32
1003         mime_type = g_hash_table_lookup(mime_type_table, ext);
1004
1005         if (mime_type) {
1006                 gchar *str;
1007                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1008                                   NULL);
1009                 debug_print("got type %s for %s\n", str, ext);
1010                 g_free(ext);
1011                 return str;
1012         }
1013         return NULL;
1014 #else
1015         gchar *str = get_content_type_from_registry_with_ext(ext);
1016
1017         g_free(ext);
1018         return str;
1019 #endif
1020 }
1021
1022 static guint procmime_str_hash(gconstpointer gptr)
1023 {
1024         guint hash_result = 0;
1025         const char *str;
1026
1027         for (str = gptr; str && *str; str++) {
1028                 if (isupper(*str)) hash_result += (*str + ' ');
1029                 else hash_result += *str;
1030         }
1031
1032         return hash_result;
1033 }
1034
1035 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1036 {
1037         const char *str1 = gptr1;
1038         const char *str2 = gptr2;
1039
1040         return !g_utf8_collate(str1, str2);
1041 }
1042
1043 static GHashTable *procmime_get_mime_type_table(void)
1044 {
1045         GHashTable *table = NULL;
1046         GList *cur;
1047         MimeType *mime_type;
1048         gchar **exts;
1049
1050         if (!mime_type_list) {
1051                 mime_type_list = procmime_get_mime_type_list();
1052                 if (!mime_type_list) return NULL;
1053         }
1054
1055         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1056
1057         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1058                 gint i;
1059                 gchar *key;
1060
1061                 mime_type = (MimeType *)cur->data;
1062
1063                 if (!mime_type->extension) continue;
1064
1065                 exts = g_strsplit(mime_type->extension, " ", 16);
1066                 for (i = 0; exts[i] != NULL; i++) {
1067                         /* use previously dup'd key on overwriting */
1068                         if (g_hash_table_lookup(table, exts[i]))
1069                                 key = exts[i];
1070                         else
1071                                 key = g_strdup(exts[i]);
1072                         g_hash_table_insert(table, key, mime_type);
1073                 }
1074                 g_strfreev(exts);
1075         }
1076
1077         return table;
1078 }
1079
1080 GList *procmime_get_mime_type_list(void)
1081 {
1082         GList *list = NULL;
1083         FILE *fp;
1084         gchar buf[BUFFSIZE];
1085         gchar *p;
1086         gchar *delim;
1087         MimeType *mime_type;
1088         gboolean fp_is_glob_file = TRUE;
1089
1090         if (mime_type_list)
1091                 return mime_type_list;
1092
1093 #if defined(__NetBSD__) || defined(__OpenBSD__) || defined(__FreeBSD__)
1094         if ((fp = g_fopen(DATAROOTDIR "/mime/globs", "rb")) == NULL)
1095 #else
1096         if ((fp = g_fopen("/usr/share/mime/globs", "rb")) == NULL)
1097 #endif
1098         {
1099                 fp_is_glob_file = FALSE;
1100                 if ((fp = g_fopen("/etc/mime.types", "rb")) == NULL) {
1101                         if ((fp = g_fopen(SYSCONFDIR "/mime.types", "rb"))
1102                                 == NULL) {
1103                                 FILE_OP_ERROR(SYSCONFDIR "/mime.types",
1104                                         "fopen");
1105                                 return NULL;
1106                         }
1107                 }
1108         }
1109
1110         while (fgets(buf, sizeof(buf), fp) != NULL) {
1111                 p = strchr(buf, '#');
1112                 if (p) *p = '\0';
1113                 g_strstrip(buf);
1114
1115                 p = buf;
1116
1117                 if (fp_is_glob_file) {
1118                         while (*p && !g_ascii_isspace(*p) && (*p!=':')) p++;
1119                 } else {
1120                         while (*p && !g_ascii_isspace(*p)) p++;
1121                 }
1122
1123                 if (*p) {
1124                         *p = '\0';
1125                         p++;
1126                 }
1127                 delim = strchr(buf, '/');
1128                 if (delim == NULL) continue;
1129                 *delim = '\0';
1130
1131                 mime_type = g_new(MimeType, 1);
1132                 mime_type->type = g_strdup(buf);
1133                 mime_type->sub_type = g_strdup(delim + 1);
1134
1135                 if (fp_is_glob_file) {
1136                         while (*p && (g_ascii_isspace(*p)||(*p=='*')||(*p=='.'))) p++;
1137                 } else {
1138                         while (*p && g_ascii_isspace(*p)) p++;
1139                 }
1140
1141                 if (*p)
1142                         mime_type->extension = g_utf8_strdown(p, -1);
1143                 else
1144                         mime_type->extension = NULL;
1145
1146                 list = g_list_append(list, mime_type);
1147         }
1148
1149         fclose(fp);
1150
1151         if (!list)
1152                 g_warning("Can't read mime.types\n");
1153
1154         return list;
1155 }
1156
1157 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1158 {
1159         if (!charset)
1160                 return ENC_8BIT;
1161         else if (!g_ascii_strncasecmp(charset, "ISO-2022-", 9) ||
1162                  !g_ascii_strcasecmp(charset, "US-ASCII"))
1163                 return ENC_7BIT;
1164         else if (!g_ascii_strcasecmp(charset, "ISO-8859-5") ||
1165                  !g_ascii_strncasecmp(charset, "KOI8-", 5) ||
1166                  !g_ascii_strcasecmp(charset, "Windows-1251"))
1167                 return ENC_8BIT;
1168         else if (!g_ascii_strncasecmp(charset, "ISO-8859-", 9))
1169                 return ENC_QUOTED_PRINTABLE;
1170         else if (!g_ascii_strncasecmp(charset, "UTF-8", 5))
1171                 return ENC_QUOTED_PRINTABLE;
1172         else
1173                 return ENC_8BIT;
1174 }
1175
1176 EncodingType procmime_get_encoding_for_text_file(const gchar *file, gboolean *has_binary)
1177 {
1178         FILE *fp;
1179         guchar buf[BUFFSIZE];
1180         size_t len;
1181         size_t octet_chars = 0;
1182         size_t total_len = 0;
1183         gfloat octet_percentage;
1184         gboolean force_b64 = FALSE;
1185
1186         if ((fp = g_fopen(file, "rb")) == NULL) {
1187                 FILE_OP_ERROR(file, "fopen");
1188                 return ENC_UNKNOWN;
1189         }
1190
1191         while ((len = fread(buf, sizeof(guchar), sizeof(buf), fp)) > 0) {
1192                 guchar *p;
1193                 gint i;
1194
1195                 for (p = buf, i = 0; i < len; ++p, ++i) {
1196                         if (*p & 0x80)
1197                                 ++octet_chars;
1198                         if (*p == '\0') {
1199                                 force_b64 = TRUE;
1200                                 *has_binary = TRUE;
1201                         }
1202                 }
1203                 total_len += len;
1204         }
1205
1206         fclose(fp);
1207
1208         if (total_len > 0)
1209                 octet_percentage = (gfloat)octet_chars / (gfloat)total_len;
1210         else
1211                 octet_percentage = 0.0;
1212
1213         debug_print("procmime_get_encoding_for_text_file(): "
1214                     "8bit chars: %zd / %zd (%f%%)\n", octet_chars, total_len,
1215                     100.0 * octet_percentage);
1216
1217         if (octet_percentage > 0.20 || force_b64) {
1218                 debug_print("using BASE64\n");
1219                 return ENC_BASE64;
1220         } else if (octet_chars > 0) {
1221                 debug_print("using quoted-printable\n");
1222                 return ENC_QUOTED_PRINTABLE;
1223         } else {
1224                 debug_print("using 7bit\n");
1225                 return ENC_7BIT;
1226         }
1227 }
1228
1229 struct EncodingTable
1230 {
1231         gchar *str;
1232         EncodingType enc_type;
1233 };
1234
1235 struct EncodingTable encoding_table[] = {
1236         {"7bit", ENC_7BIT},
1237         {"8bit", ENC_8BIT},
1238         {"binary", ENC_BINARY},
1239         {"quoted-printable", ENC_QUOTED_PRINTABLE},
1240         {"base64", ENC_BASE64},
1241         {"x-uuencode", ENC_UNKNOWN},
1242         {NULL, ENC_UNKNOWN},
1243 };
1244
1245 const gchar *procmime_get_encoding_str(EncodingType encoding)
1246 {
1247         struct EncodingTable *enc_table;
1248
1249         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1250                 if (enc_table->enc_type == encoding)
1251                         return enc_table->str;
1252         }
1253         return NULL;
1254 }
1255
1256 /* --- NEW MIME STUFF --- */
1257 struct TypeTable
1258 {
1259         gchar *str;
1260         MimeMediaType type;
1261 };
1262
1263 static struct TypeTable mime_type_table[] = {
1264         {"text", MIMETYPE_TEXT},
1265         {"image", MIMETYPE_IMAGE},
1266         {"audio", MIMETYPE_AUDIO},
1267         {"video", MIMETYPE_VIDEO},
1268         {"application", MIMETYPE_APPLICATION},
1269         {"message", MIMETYPE_MESSAGE},
1270         {"multipart", MIMETYPE_MULTIPART},
1271         {NULL, 0},
1272 };
1273
1274 const gchar *procmime_get_media_type_str(MimeMediaType type)
1275 {
1276         struct TypeTable *type_table;
1277
1278         for (type_table = mime_type_table; type_table->str != NULL; type_table++) {
1279                 if (type_table->type == type)
1280                         return type_table->str;
1281         }
1282         return NULL;
1283 }
1284
1285 MimeMediaType procmime_get_media_type(const gchar *str)
1286 {
1287         struct TypeTable *typetablearray;
1288
1289         for (typetablearray = mime_type_table; typetablearray->str != NULL; typetablearray++)
1290                 if (g_ascii_strncasecmp(str, typetablearray->str, strlen(typetablearray->str)) == 0)
1291                         return typetablearray->type;
1292
1293         return MIMETYPE_UNKNOWN;
1294 }
1295
1296 /*!
1297  *\brief        Safe wrapper for content type string.
1298  *
1299  *\return       const gchar * Pointer to content type string.
1300  */
1301 gchar *procmime_get_content_type_str(MimeMediaType type,
1302                                            const char *subtype)
1303 {
1304         const gchar *type_str = NULL;
1305
1306         if (subtype == NULL || !(type_str = procmime_get_media_type_str(type)))
1307                 return g_strdup("unknown");
1308         return g_strdup_printf("%s/%s", type_str, subtype);
1309 }
1310
1311 static int procmime_parse_mimepart(MimeInfo *parent,
1312                              gchar *content_type,
1313                              gchar *content_encoding,
1314                              gchar *content_description,
1315                              gchar *content_id,
1316                              gchar *content_disposition,
1317                              gchar *content_location,
1318                              const gchar *original_msgid,
1319                              const gchar *disposition_notification_hdr,
1320                              const gchar *filename,
1321                              guint offset,
1322                              guint length,
1323                              gboolean short_scan);
1324
1325 static void procmime_parse_message_rfc822(MimeInfo *mimeinfo, gboolean short_scan)
1326 {
1327         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
1328                                 {"Content-Transfer-Encoding:",
1329                                                    NULL, FALSE},
1330                                 {"Content-Description:",
1331                                                    NULL, TRUE},
1332                                 {"Content-ID:",
1333                                                    NULL, TRUE},
1334                                 {"Content-Disposition:",
1335                                                    NULL, TRUE},
1336                                 {"Content-Location:",
1337                                                    NULL, TRUE},
1338                                 {"MIME-Version:",
1339                                                    NULL, TRUE},
1340                                 {"Original-Message-ID:",
1341                                                    NULL, TRUE},
1342                                 {"Disposition:",
1343                                                    NULL, TRUE},
1344                                 {NULL,             NULL, FALSE}};
1345         guint content_start, i;
1346         FILE *fp;
1347         gchar *tmp;
1348         gint len = 0;
1349
1350         procmime_decode_content(mimeinfo);
1351
1352         fp = g_fopen(mimeinfo->data.filename, "rb");
1353         if (fp == NULL) {
1354                 FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
1355                 return;
1356         }
1357         fseek(fp, mimeinfo->offset, SEEK_SET);
1358         procheader_get_header_fields(fp, hentry);
1359         if (hentry[0].body != NULL) {
1360                 tmp = conv_unmime_header(hentry[0].body, NULL);
1361                 g_free(hentry[0].body);
1362                 hentry[0].body = tmp;
1363         }
1364         if (hentry[2].body != NULL) {
1365                 tmp = conv_unmime_header(hentry[2].body, NULL);
1366                 g_free(hentry[2].body);
1367                 hentry[2].body = tmp;
1368         }
1369         if (hentry[4].body != NULL) {
1370                 tmp = conv_unmime_header(hentry[4].body, NULL);
1371                 g_free(hentry[4].body);
1372                 hentry[4].body = tmp;
1373         }
1374         if (hentry[5].body != NULL) {
1375                 tmp = conv_unmime_header(hentry[5].body, NULL);
1376                 g_free(hentry[5].body);
1377                 hentry[5].body = tmp;
1378         }
1379         if (hentry[7].body != NULL) {
1380                 tmp = conv_unmime_header(hentry[7].body, NULL);
1381                 g_free(hentry[7].body);
1382                 hentry[7].body = tmp;
1383         }
1384         if (hentry[8].body != NULL) {
1385                 tmp = conv_unmime_header(hentry[8].body, NULL);
1386                 g_free(hentry[8].body);
1387                 hentry[8].body = tmp;
1388         }
1389
1390         content_start = ftell(fp);
1391         fclose(fp);
1392
1393         len = mimeinfo->length - (content_start - mimeinfo->offset);
1394         if (len < 0)
1395                 len = 0;
1396         procmime_parse_mimepart(mimeinfo,
1397                                 hentry[0].body, hentry[1].body,
1398                                 hentry[2].body, hentry[3].body,
1399                                 hentry[4].body, hentry[5].body,
1400                                 hentry[7].body, hentry[8].body,
1401                                 mimeinfo->data.filename, content_start,
1402                                 len, short_scan);
1403
1404         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1405                 g_free(hentry[i].body);
1406                 hentry[i].body = NULL;
1407         }
1408 }
1409
1410 static void procmime_parse_disposition_notification(MimeInfo *mimeinfo,
1411                 const gchar *original_msgid, const gchar *disposition_notification_hdr,
1412                 gboolean short_scan)
1413 {
1414         HeaderEntry hentry[] = {{"Original-Message-ID:",  NULL, TRUE},
1415                                 {"Disposition:",          NULL, TRUE},
1416                                 {NULL,                    NULL, FALSE}};
1417         guint i;
1418         FILE *fp;
1419         gchar *orig_msg_id = NULL;
1420         gchar *disp = NULL;
1421
1422         procmime_decode_content(mimeinfo);
1423
1424         debug_print("parse disposition notification\n");
1425         fp = g_fopen(mimeinfo->data.filename, "rb");
1426         if (fp == NULL) {
1427                 FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
1428                 return;
1429         }
1430         fseek(fp, mimeinfo->offset, SEEK_SET);
1431
1432         if (original_msgid && disposition_notification_hdr) {
1433                 hentry[0].body = g_strdup(original_msgid);
1434                 hentry[1].body = g_strdup(disposition_notification_hdr);
1435         } else {
1436                 procheader_get_header_fields(fp, hentry);
1437         }
1438
1439         if (!hentry[0].body || !hentry[1].body) {
1440                 debug_print("MsgId %s, Disp %s\n",
1441                         hentry[0].body ? hentry[0].body:"(nil)",
1442                         hentry[1].body ? hentry[1].body:"(nil)");
1443                 goto bail;
1444         }
1445
1446         orig_msg_id = g_strdup(hentry[0].body);
1447         disp = g_strdup(hentry[1].body);
1448
1449         extract_parenthesis(orig_msg_id, '<', '>');
1450         remove_space(orig_msg_id);
1451
1452         if (strstr(disp, "displayed")) {
1453                 /* find sent message, if possible */
1454                 MsgInfo *info = NULL;
1455                 GList *flist;
1456                 debug_print("%s has been displayed.\n", orig_msg_id);
1457                 for (flist = folder_get_list(); flist != NULL; flist = g_list_next(flist)) {
1458                         FolderItem *outbox = ((Folder *)(flist->data))->outbox;
1459                         if (!outbox) {
1460                                 debug_print("skipping folder with no outbox...\n");
1461                                 continue;
1462                         }
1463                         info = folder_item_get_msginfo_by_msgid(outbox, orig_msg_id);
1464                         debug_print("%s %s in %s\n", info?"found":"didn't find", orig_msg_id, outbox->path);
1465                         if (info) {
1466                                 procmsg_msginfo_set_flags(info, MSG_RETRCPT_GOT, 0);
1467                                 procmsg_msginfo_free(info);
1468                         }
1469                 }
1470         }
1471         g_free(orig_msg_id);
1472         g_free(disp);
1473 bail:
1474         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1475                 g_free(hentry[i].body);
1476                 hentry[i].body = NULL;
1477         }
1478 }
1479
1480 #define GET_HEADERS() {                                         \
1481         procheader_get_header_fields(fp, hentry);               \
1482         if (hentry[0].body != NULL) {                           \
1483                 tmp = conv_unmime_header(hentry[0].body, NULL); \
1484                 g_free(hentry[0].body);                         \
1485                 hentry[0].body = tmp;                           \
1486         }                                                       \
1487         if (hentry[2].body != NULL) {                           \
1488                 tmp = conv_unmime_header(hentry[2].body, NULL); \
1489                 g_free(hentry[2].body);                         \
1490                 hentry[2].body = tmp;                           \
1491         }                                                       \
1492         if (hentry[4].body != NULL) {                           \
1493                 tmp = conv_unmime_header(hentry[4].body, NULL); \
1494                 g_free(hentry[4].body);                         \
1495                 hentry[4].body = tmp;                           \
1496         }                                                       \
1497         if (hentry[5].body != NULL) {                           \
1498                 tmp = conv_unmime_header(hentry[5].body, NULL); \
1499                 g_free(hentry[5].body);                         \
1500                 hentry[5].body = tmp;                           \
1501         }                                                       \
1502         if (hentry[6].body != NULL) {                           \
1503                 tmp = conv_unmime_header(hentry[6].body, NULL); \
1504                 g_free(hentry[6].body);                         \
1505                 hentry[6].body = tmp;                           \
1506         }                                                       \
1507         if (hentry[7].body != NULL) {                           \
1508                 tmp = conv_unmime_header(hentry[7].body, NULL); \
1509                 g_free(hentry[7].body);                         \
1510                 hentry[7].body = tmp;                           \
1511         }                                                       \
1512 }
1513
1514 static void procmime_parse_multipart(MimeInfo *mimeinfo, gboolean short_scan)
1515 {
1516         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
1517                                 {"Content-Transfer-Encoding:",
1518                                                    NULL, FALSE},
1519                                 {"Content-Description:",
1520                                                    NULL, TRUE},
1521                                 {"Content-ID:",
1522                                                    NULL, TRUE},
1523                                 {"Content-Disposition:",
1524                                                    NULL, TRUE},
1525                                 {"Content-Location:",
1526                                                    NULL, TRUE},
1527                                 {"Original-Message-ID:",
1528                                                    NULL, TRUE},
1529                                 {"Disposition:",
1530                                                    NULL, TRUE},
1531                                 {NULL,             NULL, FALSE}};
1532         gchar *p, *tmp;
1533         gchar *boundary;
1534         gint boundary_len = 0, lastoffset = -1, i;
1535         gchar buf[BUFFSIZE];
1536         FILE *fp;
1537         int result = 0;
1538         gboolean done = FALSE;
1539
1540         boundary = g_hash_table_lookup(mimeinfo->typeparameters, "boundary");
1541         if (!boundary)
1542                 return;
1543         boundary_len = strlen(boundary);
1544
1545         procmime_decode_content(mimeinfo);
1546
1547         fp = g_fopen(mimeinfo->data.filename, "rb");
1548         if (fp == NULL) {
1549                 FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
1550                 return;
1551         }
1552         fseek(fp, mimeinfo->offset, SEEK_SET);
1553         while ((p = fgets(buf, sizeof(buf), fp)) != NULL && result == 0) {
1554                 if (ftell(fp) - 1 > (mimeinfo->offset + mimeinfo->length))
1555                         break;
1556
1557                 if (IS_BOUNDARY(buf, boundary, boundary_len)) {
1558                         if (lastoffset != -1) {
1559                                 gint len = (ftell(fp) - strlen(buf)) - lastoffset - 1;
1560                                 if (len < 0)
1561                                         len = 0;
1562                                 result = procmime_parse_mimepart(mimeinfo,
1563                                                         hentry[0].body, hentry[1].body,
1564                                                         hentry[2].body, hentry[3].body,
1565                                                         hentry[4].body, hentry[5].body,
1566                                                         hentry[6].body, hentry[7].body,
1567                                                         mimeinfo->data.filename, lastoffset,
1568                                                         len, short_scan);
1569                                 if (result == 1 && short_scan) {
1570                                         done = TRUE;
1571                                         break;
1572                                 }
1573                         }
1574
1575                         if (buf[2 + boundary_len]     == '-' &&
1576                             buf[2 + boundary_len + 1] == '-') {
1577                                 break;
1578                         }
1579                         for (i = 0; i < (sizeof hentry / sizeof hentry[0]) ; i++) {
1580                                 g_free(hentry[i].body);
1581                                 hentry[i].body = NULL;
1582                         }
1583                         GET_HEADERS();
1584                         lastoffset = ftell(fp);
1585                 }
1586         }
1587         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1588                 g_free(hentry[i].body);
1589                 hentry[i].body = NULL;
1590         }
1591         fclose(fp);
1592 }
1593
1594 static void parse_parameters(const gchar *parameters, GHashTable *table)
1595 {
1596         gchar *params, *param, *next;
1597         GSList *convlist = NULL, *concatlist = NULL, *cur;
1598
1599         params = g_strdup(parameters);
1600         param = params;
1601         next = params;
1602         for (; next != NULL; param = next) {
1603                 gchar *attribute, *value, *tmp, *down_attr, *orig_down_attr;
1604                 gint len;
1605                 gboolean convert = FALSE;
1606
1607                 next = strchr_with_skip_quote(param, '"', ';');
1608                 if (next != NULL) {
1609                         next[0] = '\0';
1610                         next++;
1611                 }
1612
1613                 g_strstrip(param);
1614
1615                 attribute = param;
1616                 value = strchr(attribute, '=');
1617                 if (value == NULL)
1618                         continue;
1619
1620                 value[0] = '\0';
1621                 value++;
1622                 while (value[0] == ' ')
1623                         value++;
1624
1625                 down_attr = g_utf8_strdown(attribute, -1);
1626                 orig_down_attr = down_attr;
1627
1628                 len = strlen(down_attr);
1629                 if (down_attr[len - 1] == '*') {
1630                         gchar *srcpos, *dstpos, *endpos;
1631
1632                         convert = TRUE;
1633                         down_attr[len - 1] = '\0';
1634
1635                         srcpos = value;
1636                         dstpos = value;
1637                         endpos = value + strlen(value);
1638                         while (srcpos < endpos) {
1639                                 if (*srcpos != '%')
1640                                         *dstpos = *srcpos;
1641                                 else {
1642                                         guchar dstvalue;
1643
1644                                         if (!get_hex_value(&dstvalue, srcpos[1], srcpos[2]))
1645                                                 *dstpos = '?';
1646                                         else
1647                                                 *dstpos = dstvalue;
1648                                         srcpos += 2;
1649                                 }
1650                                 srcpos++;
1651                                 dstpos++;
1652                         }
1653                         *dstpos = '\0';
1654                 } else {
1655                         if (value[0] == '"')
1656                                 extract_quote(value, '"');
1657                         else if ((tmp = strchr(value, ' ')) != NULL)
1658                                 *tmp = '\0';
1659                 }
1660
1661                 if (down_attr) {
1662                         while (down_attr[0] == ' ')
1663                                 down_attr++;
1664                         while (down_attr[strlen(down_attr)-1] == ' ')
1665                                 down_attr[strlen(down_attr)-1] = '\0';
1666                 }
1667                 if (value) {
1668                         while (value[0] == ' ')
1669                                 value++;
1670                         while (value[strlen(value)-1] == ' ')
1671                                 value[strlen(value)-1] = '\0';
1672                 }
1673                 if (strrchr(down_attr, '*') != NULL) {
1674                         gchar *tmpattr;
1675
1676                         tmpattr = g_strdup(down_attr);
1677                         tmp = strrchr(tmpattr, '*');
1678                         tmp[0] = '\0';
1679
1680                         if ((tmp[1] == '0') && (tmp[2] == '\0') &&
1681                             (g_slist_find_custom(concatlist, down_attr, g_str_equal) == NULL))
1682                                 concatlist = g_slist_prepend(concatlist, g_strdup(tmpattr));
1683
1684                         if (convert && (g_slist_find_custom(convlist, down_attr, g_str_equal) == NULL))
1685                                 convlist = g_slist_prepend(convlist, g_strdup(tmpattr));
1686
1687                         g_free(tmpattr);
1688                 } else if (convert) {
1689                         if (g_slist_find_custom(convlist, down_attr, g_str_equal) == NULL)
1690                                 convlist = g_slist_prepend(convlist, g_strdup(down_attr));
1691                 }
1692
1693                 if (g_hash_table_lookup(table, down_attr) == NULL)
1694                         g_hash_table_insert(table, g_strdup(down_attr), g_strdup(value));
1695                 g_free(orig_down_attr);
1696         }
1697
1698         for (cur = concatlist; cur != NULL; cur = g_slist_next(cur)) {
1699                 gchar *attribute, *attrwnum, *partvalue;
1700                 gint n = 0;
1701                 GString *value;
1702
1703                 attribute = (gchar *) cur->data;
1704                 value = g_string_sized_new(64);
1705
1706                 attrwnum = g_strdup_printf("%s*%d", attribute, n);
1707                 while ((partvalue = g_hash_table_lookup(table, attrwnum)) != NULL) {
1708                         g_string_append(value, partvalue);
1709
1710                         g_free(attrwnum);
1711                         n++;
1712                         attrwnum = g_strdup_printf("%s*%d", attribute, n);
1713                 }
1714                 g_free(attrwnum);
1715
1716                 g_hash_table_insert(table, g_strdup(attribute), g_strdup(value->str));
1717                 g_string_free(value, TRUE);
1718         }
1719         slist_free_strings(concatlist);
1720         g_slist_free(concatlist);
1721
1722         for (cur = convlist; cur != NULL; cur = g_slist_next(cur)) {
1723                 gchar *attribute, *key, *value;
1724                 gchar *charset, *lang, *oldvalue, *newvalue;
1725
1726                 attribute = (gchar *) cur->data;
1727                 if (!g_hash_table_lookup_extended(
1728                         table, attribute, (gpointer *)(gchar *) &key, (gpointer *)(gchar *) &value))
1729                         continue;
1730
1731                 charset = value;
1732                 lang = strchr(charset, '\'');
1733                 if (lang == NULL)
1734                         continue;
1735                 lang[0] = '\0';
1736                 lang++;
1737                 oldvalue = strchr(lang, '\'');
1738                 if (oldvalue == NULL)
1739                         continue;
1740                 oldvalue[0] = '\0';
1741                 oldvalue++;
1742
1743                 newvalue = conv_codeset_strdup(oldvalue, charset, CS_UTF_8);
1744
1745                 g_hash_table_remove(table, attribute);
1746                 g_free(key);
1747                 g_free(value);
1748
1749                 g_hash_table_insert(table, g_strdup(attribute), newvalue);
1750         }
1751         slist_free_strings(convlist);
1752         g_slist_free(convlist);
1753
1754         g_free(params);
1755 }
1756
1757 static void procmime_parse_content_type(const gchar *content_type, MimeInfo *mimeinfo)
1758 {
1759         g_return_if_fail(content_type != NULL);
1760         g_return_if_fail(mimeinfo != NULL);
1761
1762         /* RFC 2045, page 13 says that the mime subtype is MANDATORY;
1763          * if it's not available we use the default Content-Type */
1764         if ((content_type[0] == '\0') || (strchr(content_type, '/') == NULL)) {
1765                 mimeinfo->type = MIMETYPE_TEXT;
1766                 mimeinfo->subtype = g_strdup("plain");
1767                 if (g_hash_table_lookup(mimeinfo->typeparameters,
1768                                        "charset") == NULL) {
1769                         g_hash_table_insert(mimeinfo->typeparameters,
1770                                     g_strdup("charset"),
1771                                     g_strdup(
1772                                         conv_get_locale_charset_str_no_utf8()));
1773                 }
1774         } else {
1775                 gchar *type, *subtype, *params;
1776
1777                 type = g_strdup(content_type);
1778                 subtype = strchr(type, '/') + 1;
1779                 *(subtype - 1) = '\0';
1780                 if ((params = strchr(subtype, ';')) != NULL) {
1781                         params[0] = '\0';
1782                         params++;
1783                 }
1784
1785                 mimeinfo->type = procmime_get_media_type(type);
1786                 mimeinfo->subtype = g_strstrip(g_strdup(subtype));
1787
1788                 /* Get mimeinfo->typeparameters */
1789                 if (params != NULL)
1790                         parse_parameters(params, mimeinfo->typeparameters);
1791
1792                 g_free(type);
1793         }
1794 }
1795
1796 static void procmime_parse_content_disposition(const gchar *content_disposition, MimeInfo *mimeinfo)
1797 {
1798         gchar *tmp, *params;
1799
1800         g_return_if_fail(content_disposition != NULL);
1801         g_return_if_fail(mimeinfo != NULL);
1802
1803         tmp = g_strdup(content_disposition);
1804         if ((params = strchr(tmp, ';')) != NULL) {
1805                 params[0] = '\0';
1806                 params++;
1807         }
1808         g_strstrip(tmp);
1809
1810         if (!g_ascii_strcasecmp(tmp, "inline"))
1811                 mimeinfo->disposition = DISPOSITIONTYPE_INLINE;
1812         else if (!g_ascii_strcasecmp(tmp, "attachment"))
1813                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1814         else
1815                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1816
1817         if (params != NULL)
1818                 parse_parameters(params, mimeinfo->dispositionparameters);
1819
1820         g_free(tmp);
1821 }
1822
1823
1824 static void procmime_parse_content_encoding(const gchar *content_encoding, MimeInfo *mimeinfo)
1825 {
1826         struct EncodingTable *enc_table;
1827
1828         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1829                 if (g_ascii_strcasecmp(enc_table->str, content_encoding) == 0) {
1830                         mimeinfo->encoding_type = enc_table->enc_type;
1831                         return;
1832                 }
1833         }
1834         mimeinfo->encoding_type = ENC_UNKNOWN;
1835         return;
1836 }
1837
1838 static GSList *registered_parsers = NULL;
1839
1840 static MimeParser *procmime_get_mimeparser_for_type(MimeMediaType type, const gchar *sub_type)
1841 {
1842         GSList *cur;
1843         for (cur = registered_parsers; cur; cur = cur->next) {
1844                 MimeParser *parser = (MimeParser *)cur->data;
1845                 if (parser->type == type && !strcmp2(parser->sub_type, sub_type))
1846                         return parser;
1847         }
1848         return NULL;
1849 }
1850
1851 void procmime_mimeparser_register(MimeParser *parser)
1852 {
1853         if (!procmime_get_mimeparser_for_type(parser->type, parser->sub_type))
1854                 registered_parsers = g_slist_append(registered_parsers, parser);
1855 }
1856
1857
1858 void procmime_mimeparser_unregister(MimeParser *parser)
1859 {
1860         registered_parsers = g_slist_remove(registered_parsers, parser);
1861 }
1862
1863 static gboolean procmime_mimeparser_parse(MimeParser *parser, MimeInfo *mimeinfo)
1864 {
1865         g_return_val_if_fail(parser->parse != NULL, FALSE);
1866         return parser->parse(parser, mimeinfo);
1867 }
1868
1869 static int procmime_parse_mimepart(MimeInfo *parent,
1870                              gchar *content_type,
1871                              gchar *content_encoding,
1872                              gchar *content_description,
1873                              gchar *content_id,
1874                              gchar *content_disposition,
1875                              gchar *content_location,
1876                              const gchar *original_msgid,
1877                              const gchar *disposition_notification_hdr,
1878                              const gchar *filename,
1879                              guint offset,
1880                              guint length,
1881                              gboolean short_scan)
1882 {
1883         MimeInfo *mimeinfo;
1884         MimeParser *parser = NULL;
1885         gboolean parsed = FALSE;
1886         int result = 0;
1887
1888         /* Create MimeInfo */
1889         mimeinfo = procmime_mimeinfo_new();
1890         mimeinfo->content = MIMECONTENT_FILE;
1891         if (parent != NULL) {
1892                 if (g_node_depth(parent->node) > 32) {
1893                         /* 32 is an arbitrary value
1894                          * this avoids DOSsing ourselves
1895                          * with enormous messages
1896                          */
1897                         procmime_mimeinfo_free_all(mimeinfo);
1898                         return -1;
1899                 }
1900                 g_node_append(parent->node, mimeinfo->node);
1901         }
1902         mimeinfo->data.filename = g_strdup(filename);
1903         mimeinfo->offset = offset;
1904         mimeinfo->length = length;
1905
1906         if (content_type != NULL) {
1907                 procmime_parse_content_type(content_type, mimeinfo);
1908         } else {
1909                 mimeinfo->type = MIMETYPE_TEXT;
1910                 mimeinfo->subtype = g_strdup("plain");
1911                 if (g_hash_table_lookup(mimeinfo->typeparameters,
1912                                        "charset") == NULL) {
1913                         g_hash_table_insert(mimeinfo->typeparameters,
1914                                     g_strdup("charset"),
1915                                     g_strdup(
1916                                         conv_get_locale_charset_str_no_utf8()));
1917                 }
1918         }
1919
1920         if (content_encoding != NULL) {
1921                 procmime_parse_content_encoding(content_encoding, mimeinfo);
1922         } else {
1923                 mimeinfo->encoding_type = ENC_UNKNOWN;
1924         }
1925
1926         if (content_description != NULL)
1927                 mimeinfo->description = g_strdup(content_description);
1928         else
1929                 mimeinfo->description = NULL;
1930
1931         if (content_id != NULL)
1932                 mimeinfo->id = g_strdup(content_id);
1933         else
1934                 mimeinfo->id = NULL;
1935
1936         if (content_location != NULL)
1937                 mimeinfo->location = g_strdup(content_location);
1938         else
1939                 mimeinfo->location = NULL;
1940
1941         if (content_disposition != NULL)
1942                 procmime_parse_content_disposition(content_disposition, mimeinfo);
1943         else
1944                 mimeinfo->disposition = DISPOSITIONTYPE_UNKNOWN;
1945
1946         /* Call parser for mime type */
1947         if ((parser = procmime_get_mimeparser_for_type(mimeinfo->type, mimeinfo->subtype)) != NULL) {
1948                 parsed = procmime_mimeparser_parse(parser, mimeinfo);
1949         }
1950         if (!parsed) {
1951                 switch (mimeinfo->type) {
1952                 case MIMETYPE_TEXT:
1953                         if (g_ascii_strcasecmp(mimeinfo->subtype, "plain") == 0 && short_scan) {
1954                                 return 1;
1955                         }
1956                         break;
1957
1958                 case MIMETYPE_MESSAGE:
1959                         if (g_ascii_strcasecmp(mimeinfo->subtype, "rfc822") == 0) {
1960                                 procmime_parse_message_rfc822(mimeinfo, short_scan);
1961                         }
1962                         if (g_ascii_strcasecmp(mimeinfo->subtype, "disposition-notification") == 0) {
1963                                 procmime_parse_disposition_notification(mimeinfo,
1964                                         original_msgid, disposition_notification_hdr, short_scan);
1965                         }
1966                         break;
1967
1968                 case MIMETYPE_MULTIPART:
1969                         procmime_parse_multipart(mimeinfo, short_scan);
1970                         break;
1971
1972                 case MIMETYPE_APPLICATION:
1973                         if (g_ascii_strcasecmp(mimeinfo->subtype, "octet-stream") == 0
1974                         && original_msgid && *original_msgid
1975                         && disposition_notification_hdr && *disposition_notification_hdr) {
1976                                 procmime_parse_disposition_notification(mimeinfo,
1977                                         original_msgid, disposition_notification_hdr, short_scan);
1978                         }
1979                         break;
1980                 default:
1981                         break;
1982                 }
1983         }
1984
1985         return result;
1986 }
1987
1988 static gchar *typenames[] = {
1989     "text",
1990     "image",
1991     "audio",
1992     "video",
1993     "application",
1994     "message",
1995     "multipart",
1996     "unknown",
1997 };
1998
1999 static gboolean output_func(GNode *node, gpointer data)
2000 {
2001         guint i, depth;
2002         MimeInfo *mimeinfo = (MimeInfo *) node->data;
2003
2004         depth = g_node_depth(node);
2005         for (i = 0; i < depth; i++)
2006                 g_print("    ");
2007         g_print("%s/%s (offset:%d length:%d encoding: %d)\n", typenames[mimeinfo->type], mimeinfo->subtype, mimeinfo->offset, mimeinfo->length, mimeinfo->encoding_type);
2008
2009         return FALSE;
2010 }
2011
2012 static void output_mime_structure(MimeInfo *mimeinfo, int indent)
2013 {
2014         g_node_traverse(mimeinfo->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1, output_func, NULL);
2015 }
2016
2017 static MimeInfo *procmime_scan_file_with_offset(const gchar *filename, int offset, gboolean short_scan)
2018 {
2019         MimeInfo *mimeinfo;
2020         struct stat buf;
2021
2022         g_stat(filename, &buf);
2023
2024         mimeinfo = procmime_mimeinfo_new();
2025         mimeinfo->content = MIMECONTENT_FILE;
2026         mimeinfo->encoding_type = ENC_UNKNOWN;
2027         mimeinfo->type = MIMETYPE_MESSAGE;
2028         mimeinfo->subtype = g_strdup("rfc822");
2029         mimeinfo->data.filename = g_strdup(filename);
2030         mimeinfo->offset = offset;
2031         mimeinfo->length = buf.st_size - offset;
2032
2033         procmime_parse_message_rfc822(mimeinfo, short_scan);
2034         if (debug_get_mode())
2035                 output_mime_structure(mimeinfo, 0);
2036
2037         return mimeinfo;
2038 }
2039
2040 static MimeInfo *procmime_scan_file_full(const gchar *filename, gboolean short_scan)
2041 {
2042         MimeInfo *mimeinfo;
2043
2044         g_return_val_if_fail(filename != NULL, NULL);
2045
2046         mimeinfo = procmime_scan_file_with_offset(filename, 0, short_scan);
2047
2048         return mimeinfo;
2049 }
2050
2051 MimeInfo *procmime_scan_file(const gchar *filename)
2052 {
2053         return procmime_scan_file_full(filename, FALSE);
2054 }
2055
2056 static MimeInfo *procmime_scan_file_short(const gchar *filename)
2057 {
2058         return procmime_scan_file_full(filename, TRUE);
2059 }
2060
2061 static MimeInfo *procmime_scan_queue_file_full(const gchar *filename, gboolean short_scan)
2062 {
2063         FILE *fp;
2064         MimeInfo *mimeinfo;
2065         gchar buf[BUFFSIZE];
2066         gint offset = 0;
2067
2068         g_return_val_if_fail(filename != NULL, NULL);
2069
2070         /* Open file */
2071         if ((fp = g_fopen(filename, "rb")) == NULL)
2072                 return NULL;
2073         /* Skip queue header */
2074         while (fgets(buf, sizeof(buf), fp) != NULL) {
2075                 /* new way */
2076                 if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
2077                         strlen("X-Claws-End-Special-Headers:"))) ||
2078                    (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
2079                         strlen("X-Sylpheed-End-Special-Headers:"))))
2080                         break;
2081                 /* old way */
2082                 if (buf[0] == '\r' || buf[0] == '\n') break;
2083                 /* from other mailers */
2084                 if (!strncmp(buf, "Date: ", 6)
2085                 ||  !strncmp(buf, "To: ", 4)
2086                 ||  !strncmp(buf, "From: ", 6)
2087                 ||  !strncmp(buf, "Subject: ", 9)) {
2088                         rewind(fp);
2089                         break;
2090                 }
2091         }
2092         offset = ftell(fp);
2093         fclose(fp);
2094
2095         mimeinfo = procmime_scan_file_with_offset(filename, offset, short_scan);
2096
2097         return mimeinfo;
2098 }
2099
2100 MimeInfo *procmime_scan_queue_file(const gchar *filename)
2101 {
2102         return procmime_scan_queue_file_full(filename, FALSE);
2103 }
2104
2105 static MimeInfo *procmime_scan_queue_file_short(const gchar *filename)
2106 {
2107         return procmime_scan_queue_file_full(filename, TRUE);
2108 }
2109
2110 typedef enum {
2111     ENC_AS_TOKEN,
2112     ENC_AS_QUOTED_STRING,
2113     ENC_AS_EXTENDED,
2114     ENC_TO_ASCII,
2115 } EncodeAs;
2116
2117 typedef struct _ParametersData {
2118         FILE *fp;
2119         guint len;
2120         guint ascii_only;
2121         gint error;
2122 } ParametersData;
2123
2124 static void write_parameters(gpointer key, gpointer value, gpointer user_data)
2125 {
2126         gchar *param = key;
2127         gchar *val = value, *valpos, *tmp;
2128         ParametersData *pdata = (ParametersData *)user_data;
2129         GString *buf = g_string_new("");
2130
2131         EncodeAs encas = ENC_AS_TOKEN;
2132
2133         for (valpos = val; *valpos != 0; valpos++) {
2134                 if (!IS_ASCII(*valpos) || *valpos == '"') {
2135                         encas = ENC_AS_EXTENDED;
2136                         break;
2137                 }
2138
2139                 /* CTLs */
2140                 if (((*valpos >= 0) && (*valpos < 037)) || (*valpos == 0177)) {
2141                         encas = ENC_AS_QUOTED_STRING;
2142                         continue;
2143                 }
2144
2145                 /* tspecials + SPACE */
2146                 switch (*valpos) {
2147                 case ' ':
2148                 case '(':
2149                 case ')':
2150                 case '<':
2151                 case '>':
2152                 case '@':
2153                 case ',':
2154                 case ';':
2155                 case ':':
2156                 case '\\':
2157                 case '\'':
2158                 case '/':
2159                 case '[':
2160                 case ']':
2161                 case '?':
2162                 case '=':
2163                         encas = ENC_AS_QUOTED_STRING;
2164                         continue;
2165                 }
2166         }
2167
2168         if (encas == ENC_AS_EXTENDED && pdata->ascii_only == TRUE)
2169                 encas = ENC_TO_ASCII;
2170
2171         switch (encas) {
2172         case ENC_AS_TOKEN:
2173                 g_string_append_printf(buf, "%s=%s", param, val);
2174                 break;
2175
2176         case ENC_TO_ASCII:
2177                 tmp = g_strdup(val);
2178                 g_strcanon(tmp,
2179                         " ()<>@,';:\\/[]?=.0123456789"
2180                         "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
2181                         "abcdefghijklmnopqrstuvwxyz",
2182                         '_');
2183                 g_string_append_printf(buf, "%s=\"%s\"", param, tmp);
2184                 g_free(tmp);
2185                 break;
2186
2187         case ENC_AS_QUOTED_STRING:
2188                 g_string_append_printf(buf, "%s=\"%s\"", param, val);
2189                 break;
2190
2191         case ENC_AS_EXTENDED:
2192                 if (!g_utf8_validate(val, -1, NULL))
2193                         g_string_append_printf(buf, "%s*=%s''", param,
2194                                 conv_get_locale_charset_str());
2195                 else
2196                         g_string_append_printf(buf, "%s*=%s''", param,
2197                                 CS_INTERNAL);
2198                 for (valpos = val; *valpos != '\0'; valpos++) {
2199                         if (IS_ASCII(*valpos) && isalnum(*valpos)) {
2200                                 g_string_append_printf(buf, "%c", *valpos);
2201                         } else {
2202                                 gchar hexstr[3] = "XX";
2203                                 get_hex_str(hexstr, *valpos);
2204                                 g_string_append_printf(buf, "%%%s", hexstr);
2205                         }
2206                 }
2207                 break;
2208         }
2209
2210         if (buf->str && strlen(buf->str)) {
2211                 if (pdata->len + strlen(buf->str) + 2 > 76) {
2212                         if (fprintf(pdata->fp, ";\n %s", buf->str) < 0)
2213                                 pdata->error = TRUE;
2214                         pdata->len = strlen(buf->str) + 1;
2215                 } else {
2216                         if (fprintf(pdata->fp, "; %s", buf->str) < 0)
2217                                 pdata->error = TRUE;
2218                         pdata->len += strlen(buf->str) + 2;
2219                 }
2220         }
2221         g_string_free(buf, TRUE);
2222 }
2223
2224 #define TRY(func) { \
2225         if (!(func)) { \
2226                 return -1; \
2227         } \
2228 }
2229
2230 int procmime_write_mime_header(MimeInfo *mimeinfo, FILE *fp)
2231 {
2232         struct TypeTable *type_table;
2233         ParametersData *pdata = g_new0(ParametersData, 1);
2234         debug_print("procmime_write_mime_header\n");
2235
2236         pdata->fp = fp;
2237         pdata->ascii_only = FALSE;
2238         pdata->error = FALSE;
2239         for (type_table = mime_type_table; type_table->str != NULL; type_table++)
2240                 if (mimeinfo->type == type_table->type) {
2241                         gchar *buf = g_strdup_printf(
2242                                 "Content-Type: %s/%s", type_table->str, mimeinfo->subtype);
2243                         if (fprintf(fp, "%s", buf) < 0) {
2244                                 g_free(buf);
2245                                 g_free(pdata);
2246                                 return -1;
2247                         }
2248                         pdata->len = strlen(buf);
2249                         pdata->ascii_only = TRUE;
2250                         g_free(buf);
2251                         break;
2252                 }
2253         g_hash_table_foreach(mimeinfo->typeparameters, write_parameters, pdata);
2254         if (pdata->error == TRUE) {
2255                 g_free(pdata);
2256                 return -1;
2257         }
2258         g_free(pdata);
2259
2260         TRY(fprintf(fp, "\n") >= 0);
2261
2262         if (mimeinfo->encoding_type != ENC_UNKNOWN)
2263                 TRY(fprintf(fp, "Content-Transfer-Encoding: %s\n", procmime_get_encoding_str(mimeinfo->encoding_type)) >= 0);
2264
2265         if (mimeinfo->description != NULL)
2266                 TRY(fprintf(fp, "Content-Description: %s\n", mimeinfo->description) >= 0);
2267
2268         if (mimeinfo->id != NULL)
2269                 TRY(fprintf(fp, "Content-ID: %s\n", mimeinfo->id) >= 0);
2270
2271         if (mimeinfo->location != NULL)
2272                 TRY(fprintf(fp, "Content-Location: %s\n", mimeinfo->location) >= 0);
2273
2274         if (mimeinfo->disposition != DISPOSITIONTYPE_UNKNOWN) {
2275                 ParametersData *pdata = g_new0(ParametersData, 1);
2276                 gchar *buf = NULL;
2277                 if (mimeinfo->disposition == DISPOSITIONTYPE_INLINE)
2278                         buf = g_strdup("Content-Disposition: inline");
2279                 else if (mimeinfo->disposition == DISPOSITIONTYPE_ATTACHMENT)
2280                         buf = g_strdup("Content-Disposition: attachment");
2281                 else
2282                         buf = g_strdup("Content-Disposition: unknown");
2283
2284                 if (fprintf(fp, "%s", buf) < 0) {
2285                         g_free(buf);
2286                         g_free(pdata);
2287                         return -1;
2288                 }
2289                 pdata->len = strlen(buf);
2290                 g_free(buf);
2291
2292                 pdata->fp = fp;
2293                 pdata->ascii_only = FALSE;
2294                 pdata->error = FALSE;
2295                 g_hash_table_foreach(mimeinfo->dispositionparameters, write_parameters, pdata);
2296                 if (pdata->error == TRUE) {
2297                         g_free(pdata);
2298                         return -1;
2299                 }
2300                 g_free(pdata);
2301                 TRY(fprintf(fp, "\n") >= 0);
2302         }
2303
2304         TRY(fprintf(fp, "\n") >= 0);
2305
2306         return 0;
2307 }
2308
2309 static gint procmime_write_message_rfc822(MimeInfo *mimeinfo, FILE *fp)
2310 {
2311         FILE *infp;
2312         GNode *childnode;
2313         MimeInfo *child;
2314         gchar buf[BUFFSIZE];
2315         gboolean skip = FALSE;;
2316         size_t len;
2317
2318         debug_print("procmime_write_message_rfc822\n");
2319
2320         /* write header */
2321         switch (mimeinfo->content) {
2322         case MIMECONTENT_FILE:
2323                 if ((infp = g_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2324                         FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
2325                         return -1;
2326                 }
2327                 fseek(infp, mimeinfo->offset, SEEK_SET);
2328                 while (fgets(buf, sizeof(buf), infp) == buf) {
2329                         strcrchomp(buf);
2330                         if (buf[0] == '\n' && buf[1] == '\0')
2331                                 break;
2332                         if (skip && (buf[0] == ' ' || buf[0] == '\t'))
2333                                 continue;
2334                         if (g_ascii_strncasecmp(buf, "Mime-Version:", 13) == 0 ||
2335                             g_ascii_strncasecmp(buf, "Content-Type:", 13) == 0 ||
2336                             g_ascii_strncasecmp(buf, "Content-Transfer-Encoding:", 26) == 0 ||
2337                             g_ascii_strncasecmp(buf, "Content-Description:", 20) == 0 ||
2338                             g_ascii_strncasecmp(buf, "Content-ID:", 11) == 0 ||
2339                             g_ascii_strncasecmp(buf, "Content-Location:", 17) == 0 ||
2340                             g_ascii_strncasecmp(buf, "Content-Disposition:", 20) == 0) {
2341                                 skip = TRUE;
2342                                 continue;
2343                         }
2344                         len = strlen(buf);
2345                         if (fwrite(buf, sizeof(gchar), len, fp) < len) {
2346                                 g_warning("failed to dump %zd bytes from file", len);
2347                                 fclose(infp);
2348                                 return -1;
2349                         }
2350                         skip = FALSE;
2351                 }
2352                 fclose(infp);
2353                 break;
2354
2355         case MIMECONTENT_MEM:
2356                 len = strlen(mimeinfo->data.mem);
2357                 if (fwrite(mimeinfo->data.mem, sizeof(gchar), len, fp) < len) {
2358                         g_warning("failed to dump %zd bytes from mem", len);
2359                         return -1;
2360                 }
2361                 break;
2362
2363         default:
2364                 break;
2365         }
2366
2367         childnode = mimeinfo->node->children;
2368         if (childnode == NULL)
2369                 return -1;
2370
2371         child = (MimeInfo *) childnode->data;
2372         if (fprintf(fp, "Mime-Version: 1.0\n") < 0) {
2373                 g_warning("failed to write mime version");
2374                 return -1;
2375         }
2376         if (procmime_write_mime_header(child, fp) < 0)
2377                 return -1;
2378         return procmime_write_mimeinfo(child, fp);
2379 }
2380
2381 static gint procmime_write_multipart(MimeInfo *mimeinfo, FILE *fp)
2382 {
2383         FILE *infp;
2384         GNode *childnode;
2385         gchar *boundary, *str, *str2;
2386         gchar buf[BUFFSIZE];
2387         gboolean firstboundary;
2388         size_t len;
2389
2390         debug_print("procmime_write_multipart\n");
2391
2392         boundary = g_hash_table_lookup(mimeinfo->typeparameters, "boundary");
2393
2394         switch (mimeinfo->content) {
2395         case MIMECONTENT_FILE:
2396                 if ((infp = g_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2397                         FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
2398                         return -1;
2399                 }
2400                 fseek(infp, mimeinfo->offset, SEEK_SET);
2401                 while (fgets(buf, sizeof(buf), infp) == buf) {
2402                         if (IS_BOUNDARY(buf, boundary, strlen(boundary)))
2403                                 break;
2404                         len = strlen(buf);
2405                         if (fwrite(buf, sizeof(gchar), len, fp) < len) {
2406                                 g_warning("failed to write %zd", len);
2407                                 fclose(infp);
2408                                 return -1;
2409                         }
2410                 }
2411                 fclose(infp);
2412                 break;
2413
2414         case MIMECONTENT_MEM:
2415                 str = g_strdup(mimeinfo->data.mem);
2416                 if (((str2 = strstr(str, boundary)) != NULL) && ((str2 - str) >= 2) &&
2417                     (*(str2 - 1) == '-') && (*(str2 - 2) == '-'))
2418                         *(str2 - 2) = '\0';
2419                 len = strlen(str);
2420                 if (fwrite(str, sizeof(gchar), len, fp) < len) {
2421                         g_warning("failed to write %zd from mem", len);
2422                         g_free(str);
2423                         return -1;
2424                 }
2425                 g_free(str);
2426                 break;
2427
2428         default:
2429                 break;
2430         }
2431
2432         childnode = mimeinfo->node->children;
2433         firstboundary = TRUE;
2434         while (childnode != NULL) {
2435                 MimeInfo *child = childnode->data;
2436
2437                 if (firstboundary)
2438                         firstboundary = FALSE;
2439                 else
2440                         TRY(fprintf(fp, "\n") >= 0);
2441
2442                 TRY(fprintf(fp, "--%s\n", boundary) >= 0);
2443
2444                 if (procmime_write_mime_header(child, fp) < 0)
2445                         return -1;
2446                 if (procmime_write_mimeinfo(child, fp) < 0)
2447                         return -1;
2448
2449                 childnode = g_node_next_sibling(childnode);
2450         }
2451         TRY(fprintf(fp, "\n--%s--\n", boundary) >= 0);
2452
2453         return 0;
2454 }
2455
2456 gint procmime_write_mimeinfo(MimeInfo *mimeinfo, FILE *fp)
2457 {
2458         FILE *infp;
2459         size_t len;
2460         debug_print("procmime_write_mimeinfo\n");
2461
2462         if (G_NODE_IS_LEAF(mimeinfo->node)) {
2463                 switch (mimeinfo->content) {
2464                 case MIMECONTENT_FILE:
2465                         if ((infp = g_fopen(mimeinfo->data.filename, "rb")) == NULL) {
2466                                 FILE_OP_ERROR(mimeinfo->data.filename, "fopen");
2467                                 return -1;
2468                         }
2469                         copy_file_part_to_fp(infp, mimeinfo->offset, mimeinfo->length, fp);
2470                         fclose(infp);
2471                         return 0;
2472
2473                 case MIMECONTENT_MEM:
2474                         len = strlen(mimeinfo->data.mem);
2475                         if (fwrite(mimeinfo->data.mem, sizeof(gchar), len, fp) < len)
2476                                 return -1;
2477                         return 0;
2478
2479                 default:
2480                         return 0;
2481                 }
2482         } else {
2483                 /* Call writer for mime type */
2484                 switch (mimeinfo->type) {
2485                 case MIMETYPE_MESSAGE:
2486                         if (g_ascii_strcasecmp(mimeinfo->subtype, "rfc822") == 0) {
2487                                 return procmime_write_message_rfc822(mimeinfo, fp);
2488                         }
2489                         break;
2490
2491                 case MIMETYPE_MULTIPART:
2492                         return procmime_write_multipart(mimeinfo, fp);
2493
2494                 default:
2495                         break;
2496                 }
2497
2498                 return -1;
2499         }
2500
2501         return 0;
2502 }
2503
2504 gchar *procmime_get_part_file_name(MimeInfo *mimeinfo)
2505 {
2506         gchar *base;
2507
2508         if ((mimeinfo->type == MIMETYPE_TEXT) && !g_ascii_strcasecmp(mimeinfo->subtype, "html"))
2509                 base = g_strdup("mimetmp.html");
2510         else {
2511                 const gchar *basetmp;
2512                 gchar *basename;
2513
2514                 basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "filename");
2515                 if (basetmp == NULL)
2516                         basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "name");
2517                 if (basetmp == NULL)
2518                         basetmp = "mimetmp";
2519                 basename = g_path_get_basename(basetmp);
2520                 if (*basename == '\0') {
2521                         g_free(basename);
2522                         basename = g_strdup("mimetmp");
2523                 }
2524                 base = conv_filename_from_utf8(basename);
2525                 g_free(basename);
2526                 subst_for_shellsafe_filename(base);
2527         }
2528
2529         return base;
2530 }
2531