src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 Hiroyuki Yamamoto
   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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <locale.h>
  30 #include <ctype.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <unistd.h>
  34
  35 #include "intl.h"
  36 #include "procmime.h"
  37 #include "procheader.h"
  38 #include "base64.h"
  39 #include "quoted-printable.h"
  40 #include "uuencode.h"
  41 #include "unmime.h"
  42 #include "html.h"
  43 #include "enriched.h"
  44 #include "codeconv.h"
  45 #include "utils.h"
  46 #include "prefs_common.h"
  47
  48 #include "prefs_gtk.h"
  49
  50 static GHashTable *procmime_get_mime_type_table (void);
  51
  52 MimeInfo *procmime_mimeinfo_new(void)
  53 {
  54         MimeInfo *mimeinfo;
  55
  56         mimeinfo = g_new0(MimeInfo, 1);
  57         mimeinfo->type          = MIMETYPE_UNKNOWN;
  58         mimeinfo->encoding_type = ENC_UNKNOWN;
  59
  60         mimeinfo->parameters = g_hash_table_new(g_str_hash, g_str_equal);
  61         mimeinfo->node       = g_node_new(mimeinfo);
  62
  63         return mimeinfo;
  64 }
  65
  66 static gboolean procmime_mimeinfo_parameters_destroy(gpointer key, gpointer value, gpointer user_data)
  67 {
  68         g_free(key);
  69         g_free(value);
  70
  71         return TRUE;
  72 }
  73
  74 static gboolean free_func(GNode *node, gpointer data)
  75 {
  76         MimeInfo *mimeinfo = (MimeInfo *) node->data;
  77
  78         g_free(mimeinfo->encoding);
  79         g_free(mimeinfo->name);
  80         if(mimeinfo->tmpfile)
  81                 unlink(mimeinfo->filename);
  82         g_free(mimeinfo->filename);
  83
  84         g_free(mimeinfo->subtype);
  85         g_free(mimeinfo->description);
  86         g_free(mimeinfo->id);
  87
  88         g_hash_table_foreach_remove(mimeinfo->parameters, procmime_mimeinfo_parameters_destroy, NULL);
  89         g_hash_table_destroy(mimeinfo->parameters);
  90
  91         if (mimeinfo->privacy)
  92                 privacy_free_privacydata(mimeinfo->privacy);
  93
  94         g_free(mimeinfo);
  95
  96         return FALSE;
  97 }
  98
  99 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
 100 {
 101         GNode *node;
 102
 103         g_return_if_fail(mimeinfo);
 104
 105         node = mimeinfo->node;
 106         g_node_traverse(node, G_IN_ORDER, G_TRAVERSE_ALL, -1, free_func, NULL);
 107
 108         g_node_destroy(node);
 109 }
 110
 111 #if 0 /* UNUSED */
 112 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 113 {
 114         MimeInfo *child = parent->children;
 115
 116         if (!child)
 117                 parent->children = mimeinfo;
 118         else {
 119                 while (child->next != NULL)
 120                         child = child->next;
 121
 122                 child->next = mimeinfo;
 123         }
 124
 125         mimeinfo->parent = parent;
 126         mimeinfo->level = parent->level + 1;
 127
 128         return mimeinfo;
 129 }
 130
 131 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 132 {
 133         MimeInfo *parent = old->parent;
 134         MimeInfo *child;
 135
 136         g_return_if_fail(parent != NULL);
 137         g_return_if_fail(new->next == NULL);
 138
 139         for (child = parent->children; child && child != old;
 140              child = child->next)
 141                 ;
 142         if (!child) {
 143                 g_warning("oops: parent can't find it's own child");
 144                 return;
 145         }
 146         procmime_mimeinfo_free_all(old);
 147
 148         if (child == parent->children) {
 149                 new->next = parent->children->next;
 150                 parent->children = new;
 151         } else {
 152                 new->next = child->next;
 153                 child = new;
 154         }
 155 }
 156 #endif
 157
 158 MimeInfo *procmime_mimeinfo_parent(MimeInfo *mimeinfo)
 159 {
 160         g_return_val_if_fail(mimeinfo != 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
 194         filename = procmsg_get_message_file(msginfo);
 195         if(!filename)
 196                 return NULL;
 197         if (msginfo->folder->stype != F_QUEUE &&
 198             msginfo->folder->stype != F_DRAFT)
 199                 mimeinfo = procmime_scan_file(filename);
 200         else
 201                 mimeinfo = procmime_scan_queue_file(filename);
 202         g_free(filename);
 203
 204         return mimeinfo;
 205 }
 206
 207 enum
 208 {
 209         H_CONTENT_TRANSFER_ENCODING = 0,
 210         H_CONTENT_TYPE              = 1,
 211         H_CONTENT_DISPOSITION       = 2,
 212         H_CONTENT_DESCRIPTION       = 3,
 213         H_SUBJECT                   = 4
 214 };
 215
 216 const gchar *procmime_mimeinfo_get_parameter(MimeInfo *mimeinfo, const gchar *name)
 217 {
 218         g_return_val_if_fail(mimeinfo != NULL, NULL);
 219         g_return_val_if_fail(name != NULL, NULL);
 220
 221         return g_hash_table_lookup(mimeinfo->parameters, name);
 222 }
 223
 224 gboolean procmime_decode_content(MimeInfo *mimeinfo)
 225 {
 226         gchar buf[BUFFSIZE];
 227         gint readend;
 228         gchar *tmpfilename;
 229         gchar *mimetmpdir;
 230         FILE *outfp, *infp;
 231         struct stat statbuf;
 232
 233         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 234
 235         if(mimeinfo->encoding_type == ENC_BINARY)
 236                 return TRUE;
 237
 238         infp = fopen(mimeinfo->filename, "rb");
 239         if(!infp) {
 240                 perror("fopen");
 241                 return FALSE;
 242         }
 243         fseek(infp, mimeinfo->offset, SEEK_SET);
 244
 245         mimetmpdir = get_mime_tmp_dir();
 246         outfp = get_tmpfile_in_dir(mimetmpdir, &tmpfilename);
 247         if (!outfp) {
 248                 perror("tmpfile");
 249                 return FALSE;
 250         }
 251
 252         readend = mimeinfo->offset + mimeinfo->length;
 253
 254         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 255                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 256                         gint len;
 257                         len = qp_decode_line(buf);
 258                         fwrite(buf, len, 1, outfp);
 259                 }
 260         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 261                 gchar outbuf[BUFFSIZE];
 262                 gint len;
 263                 Base64Decoder *decoder;
 264
 265                 decoder = base64_decoder_new();
 266                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 267                         len = base64_decoder_decode(decoder, buf, outbuf);
 268                         if (len < 0) {
 269                                 g_warning("Bad BASE64 content\n");
 270                                 break;
 271                         }
 272                         fwrite(outbuf, sizeof(gchar), len, outfp);
 273                 }
 274                 base64_decoder_free(decoder);
 275         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 276                 gchar outbuf[BUFFSIZE];
 277                 gint len;
 278                 gboolean flag = FALSE;
 279
 280                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 281                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 282
 283                         if (flag) {
 284                                 len = fromuutobits(outbuf, buf);
 285                                 if (len <= 0) {
 286                                         if (len < 0)
 287                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 288                                         break;
 289                                 }
 290                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 291                         } else
 292                                 flag = TRUE;
 293                 }
 294         } else {
 295                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 296                         fputs(buf, outfp);
 297                 }
 298         }
 299
 300         fclose(outfp);
 301         fclose(infp);
 302
 303         stat(tmpfilename, &statbuf);
 304         if(mimeinfo->tmpfile)
 305                 unlink(mimeinfo->filename);
 306         g_free(mimeinfo->filename);
 307         mimeinfo->filename = tmpfilename;
 308         mimeinfo->tmpfile = TRUE;
 309         mimeinfo->offset = 0;
 310         mimeinfo->length = statbuf.st_size;
 311         mimeinfo->encoding_type = ENC_BINARY;
 312
 313         return TRUE;
 314 }
 315
 316 gint procmime_get_part(const gchar *outfile, MimeInfo *mimeinfo)
 317 {
 318         FILE *infp, *outfp;
 319         gchar buf[BUFFSIZE];
 320         gint restlength, readlength;
 321
 322         g_return_val_if_fail(outfile != NULL, -1);
 323         g_return_val_if_fail(mimeinfo != NULL, -1);
 324
 325         if(mimeinfo->encoding_type != ENC_BINARY && !procmime_decode_content(mimeinfo))
 326                 return -1;
 327
 328         if ((infp = fopen(mimeinfo->filename, "rb")) == NULL) {
 329                 FILE_OP_ERROR(mimeinfo->filename, "fopen");
 330                 return -1;
 331         }
 332         if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
 333                 FILE_OP_ERROR(mimeinfo->filename, "fseek");
 334                 fclose(infp);
 335                 return -1;
 336         }
 337         if ((outfp = fopen(outfile, "wb")) == NULL) {
 338                 FILE_OP_ERROR(outfile, "fopen");
 339                 fclose(infp);
 340                 return -1;
 341         }
 342
 343         restlength = mimeinfo->length;
 344
 345         while ((restlength > 0) && ((readlength = fread(buf, 1, restlength > BUFFSIZE ? BUFFSIZE : restlength, infp)) > 0)) {
 346                 fwrite(buf, 1, readlength, outfp);
 347                 restlength -= readlength;
 348         }
 349
 350         fclose(infp);
 351         if (fclose(outfp) == EOF) {
 352                 FILE_OP_ERROR(outfile, "fclose");
 353                 unlink(outfile);
 354                 return -1;
 355         }
 356
 357         return 0;
 358 }
 359
 360 struct ContentRenderer {
 361         char * content_type;
 362         char * renderer;
 363 };
 364
 365 static GList * renderer_list = NULL;
 366
 367 static struct ContentRenderer *
 368 content_renderer_new(char * content_type, char * renderer)
 369 {
 370         struct ContentRenderer * cr;
 371
 372         cr = g_new(struct ContentRenderer, 1);
 373         if (cr == NULL)
 374                 return NULL;
 375
 376         cr->content_type = g_strdup(content_type);
 377         cr->renderer = g_strdup(renderer);
 378
 379         return cr;
 380 }
 381
 382 static void content_renderer_free(struct ContentRenderer * cr)
 383 {
 384         g_free(cr->content_type);
 385         g_free(cr->renderer);
 386         g_free(cr);
 387 }
 388
 389 void renderer_read_config(void)
 390 {
 391         gchar buf[BUFFSIZE];
 392         FILE * f;
 393         gchar * rcpath;
 394
 395         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 396         renderer_list = NULL;
 397
 398         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 399         f = fopen(rcpath, "rb");
 400         g_free(rcpath);
 401
 402         if (f == NULL)
 403                 return;
 404
 405         while (fgets(buf, BUFFSIZE, f)) {
 406                 char * p;
 407                 struct ContentRenderer * cr;
 408
 409                 strretchomp(buf);
 410                 p = strchr(buf, ' ');
 411                 if (p == NULL)
 412                         continue;
 413                 * p = 0;
 414
 415                 cr = content_renderer_new(buf, p + 1);
 416                 if (cr == NULL)
 417                         continue;
 418
 419                 renderer_list = g_list_append(renderer_list, cr);
 420         }
 421
 422         fclose(f);
 423 }
 424
 425 void renderer_write_config(void)
 426 {
 427         gchar * rcpath;
 428         PrefFile *pfile;
 429         GList * cur;
 430
 431         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 432
 433         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 434                 g_warning("failed to write configuration to file\n");
 435                 g_free(rcpath);
 436                 return;
 437         }
 438
 439         g_free(rcpath);
 440
 441         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 442                 struct ContentRenderer * renderer;
 443                 renderer = cur->data;
 444                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 445                         renderer->renderer);
 446         }
 447
 448         if (prefs_file_close(pfile) < 0) {
 449                 g_warning("failed to write configuration to file\n");
 450                 return;
 451         }
 452 }
 453
 454 FILE *procmime_get_text_content(MimeInfo *mimeinfo)
 455 {
 456         FILE *tmpfp, *outfp;
 457         const gchar *src_codeset;
 458         gboolean conv_fail = FALSE;
 459         gchar buf[BUFFSIZE];
 460         gchar *str;
 461         struct ContentRenderer * renderer;
 462         GList * cur;
 463         gchar *tmpfile, *content_type;
 464
 465         g_return_val_if_fail(mimeinfo != NULL, NULL);
 466
 467         if (!procmime_decode_content(mimeinfo))
 468                 return NULL;
 469
 470         tmpfile = procmime_get_tmp_file_name(mimeinfo);
 471         if (tmpfile == NULL)
 472                 return NULL;
 473
 474         if (procmime_get_part(tmpfile, mimeinfo) < 0) {
 475                 g_free(tmpfile);
 476                 return NULL;
 477         }
 478
 479         tmpfp = fopen(tmpfile, "rb");
 480         if (tmpfp == NULL) {
 481                 g_free(tmpfile);
 482                 return NULL;
 483         }
 484
 485         if ((outfp = my_tmpfile()) == NULL) {
 486                 perror("tmpfile");
 487                 fclose(tmpfp);
 488                 g_free(tmpfile);
 489                 return NULL;
 490         }
 491
 492         src_codeset = prefs_common.force_charset
 493                 ? prefs_common.force_charset :
 494                 procmime_mimeinfo_get_parameter(mimeinfo, "charset");
 495
 496         renderer = NULL;
 497
 498         content_type = g_strdup_printf("%s/%s", procmime_get_type_str(mimeinfo->type),
 499                 mimeinfo->subtype);
 500         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 501                 struct ContentRenderer * cr;
 502
 503                 cr = cur->data;
 504                 if (g_strcasecmp(cr->content_type, content_type) == 0) {
 505                         renderer = cr;
 506                         break;
 507                 }
 508         }
 509         g_free(content_type);
 510
 511         if (renderer != NULL) {
 512                 FILE * p;
 513                 int oldout;
 514
 515                 oldout = dup(1);
 516
 517                 dup2(fileno(outfp), 1);
 518
 519                 p = popen(renderer->renderer, "w");
 520                 if (p != NULL) {
 521                         size_t count;
 522
 523                         while ((count =
 524                                 fread(buf, sizeof(char), sizeof(buf),
 525                                       tmpfp)) > 0)
 526                                 fwrite(buf, sizeof(char), count, p);
 527                         pclose(p);
 528                 }
 529
 530                 dup2(oldout, 1);
 531         } else if (mimeinfo->type == MIMETYPE_TEXT && !g_strcasecmp(mimeinfo->subtype, "html")) {
 532                 HTMLParser *parser;
 533                 CodeConverter *conv;
 534
 535                 conv = conv_code_converter_new(src_codeset);
 536                 parser = html_parser_new(tmpfp, conv);
 537                 while ((str = html_parse(parser)) != NULL) {
 538                         fputs(str, outfp);
 539                 }
 540                 html_parser_destroy(parser);
 541                 conv_code_converter_destroy(conv);
 542         } else if (mimeinfo->type == MIMETYPE_TEXT && !g_strcasecmp(mimeinfo->subtype, "enriched")) {
 543                 ERTFParser *parser;
 544                 CodeConverter *conv;
 545
 546                 conv = conv_code_converter_new(src_codeset);
 547                 parser = ertf_parser_new(tmpfp, conv);
 548                 while ((str = ertf_parse(parser)) != NULL) {
 549                         fputs(str, outfp);
 550                 }
 551                 ertf_parser_destroy(parser);
 552                 conv_code_converter_destroy(conv);
 553         } else if (mimeinfo->type == MIMETYPE_TEXT) {
 554                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 555                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 556                         if (str) {
 557                                 fputs(str, outfp);
 558                                 g_free(str);
 559                         } else {
 560                                 conv_fail = TRUE;
 561                                 fputs(buf, outfp);
 562                         }
 563                 }
 564         }
 565
 566         if (conv_fail)
 567                 g_warning("procmime_get_text_content(): Code conversion failed.\n");
 568
 569         fclose(tmpfp);
 570         rewind(outfp);
 571         unlink(tmpfile);
 572         g_free(tmpfile);
 573
 574         return outfp;
 575 }
 576
 577 /* search the first text part of (multipart) MIME message,
 578    decode, convert it and output to outfp. */
 579 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 580 {
 581         FILE *outfp = NULL;
 582         MimeInfo *mimeinfo, *partinfo;
 583
 584         g_return_val_if_fail(msginfo != NULL, NULL);
 585
 586         mimeinfo = procmime_scan_message(msginfo);
 587         if (!mimeinfo) return NULL;
 588
 589         partinfo = mimeinfo;
 590         while (partinfo && partinfo->type != MIMETYPE_TEXT)
 591                 partinfo = procmime_mimeinfo_next(partinfo);
 592
 593         if (partinfo)
 594                 outfp = procmime_get_text_content(partinfo);
 595
 596         procmime_mimeinfo_free_all(mimeinfo);
 597
 598         return outfp;
 599 }
 600
 601 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 602                                    const gchar *str, gboolean case_sens)
 603 {
 604         FILE *outfp;
 605         gchar buf[BUFFSIZE];
 606         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 607
 608         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 609         g_return_val_if_fail(mimeinfo->type == MIMETYPE_TEXT, FALSE);
 610         g_return_val_if_fail(str != NULL, FALSE);
 611
 612         outfp = procmime_get_text_content(mimeinfo);
 613
 614         if (!outfp)
 615                 return FALSE;
 616
 617         if (case_sens)
 618                 StrFindFunc = strstr;
 619         else
 620                 StrFindFunc = strcasestr;
 621
 622         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 623                 if (StrFindFunc(buf, str) != NULL) {
 624                         fclose(outfp);
 625                         return TRUE;
 626                 }
 627         }
 628
 629         fclose(outfp);
 630
 631         return FALSE;
 632 }
 633
 634 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
 635                               gboolean case_sens)
 636 {
 637         MimeInfo *mimeinfo;
 638         MimeInfo *partinfo;
 639         gchar *filename;
 640         gboolean found = FALSE;
 641
 642         g_return_val_if_fail(msginfo != NULL, FALSE);
 643         g_return_val_if_fail(str != NULL, FALSE);
 644
 645         filename = procmsg_get_message_file(msginfo);
 646         if (!filename) return FALSE;
 647         mimeinfo = procmime_scan_message(msginfo);
 648
 649         for (partinfo = mimeinfo; partinfo != NULL;
 650              partinfo = procmime_mimeinfo_next(partinfo)) {
 651                 if (partinfo->type == MIMETYPE_TEXT) {
 652                         if (procmime_find_string_part
 653                                 (partinfo, filename, str, case_sens) == TRUE) {
 654                                 found = TRUE;
 655                                 break;
 656                         }
 657                 }
 658         }
 659
 660         procmime_mimeinfo_free_all(mimeinfo);
 661         g_free(filename);
 662
 663         return found;
 664 }
 665
 666 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
 667 {
 668         static guint32 id = 0;
 669         gchar *base;
 670         gchar *filename;
 671         gchar f_prefix[10];
 672
 673         g_return_val_if_fail(mimeinfo != NULL, NULL);
 674
 675         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
 676
 677         if ((mimeinfo->type == MIMETYPE_TEXT) && !g_strcasecmp(mimeinfo->subtype, "html"))
 678                 base = "mimetmp.html";
 679         else {
 680                 base = mimeinfo->name ? mimeinfo->name : "mimetmp";
 681                 base = g_basename(base);
 682                 if (*base == '\0') base = "mimetmp";
 683                 Xstrdup_a(base, base, return NULL);
 684                 subst_for_filename(base);
 685         }
 686
 687         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 688                                f_prefix, base, NULL);
 689
 690         return filename;
 691 }
 692
 693 static GList *mime_type_list = NULL;
 694
 695 gchar *procmime_get_mime_type(const gchar *filename)
 696 {
 697         static GHashTable *mime_type_table = NULL;
 698         MimeType *mime_type;
 699         const gchar *p;
 700         gchar *ext;
 701
 702         if (!mime_type_table) {
 703                 mime_type_table = procmime_get_mime_type_table();
 704                 if (!mime_type_table) return NULL;
 705         }
 706
 707         filename = g_basename(filename);
 708         p = strrchr(filename, '.');
 709         if (!p) return NULL;
 710
 711         Xstrdup_a(ext, p + 1, return NULL);
 712         g_strdown(ext);
 713         mime_type = g_hash_table_lookup(mime_type_table, ext);
 714         if (mime_type) {
 715                 gchar *str;
 716
 717                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
 718                                   NULL);
 719                 return str;
 720         }
 721
 722         return NULL;
 723 }
 724
 725 static guint procmime_str_hash(gconstpointer gptr)
 726 {
 727         guint hash_result = 0;
 728         const char *str;
 729
 730         for (str = gptr; str && *str; str++) {
 731                 if (isupper(*str)) hash_result += (*str + ' ');
 732                 else hash_result += *str;
 733         }
 734
 735         return hash_result;
 736 }
 737
 738 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
 739 {
 740         const char *str1 = gptr1;
 741         const char *str2 = gptr2;
 742
 743         return !strcasecmp(str1, str2);
 744 }
 745
 746 static GHashTable *procmime_get_mime_type_table(void)
 747 {
 748         GHashTable *table = NULL;
 749         GList *cur;
 750         MimeType *mime_type;
 751         gchar **exts;
 752
 753         if (!mime_type_list) {
 754                 mime_type_list = procmime_get_mime_type_list();
 755                 if (!mime_type_list) return NULL;
 756         }
 757
 758         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
 759
 760         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
 761                 gint i;
 762                 gchar *key;
 763
 764                 mime_type = (MimeType *)cur->data;
 765
 766                 if (!mime_type->extension) continue;
 767
 768                 exts = g_strsplit(mime_type->extension, " ", 16);
 769                 for (i = 0; exts[i] != NULL; i++) {
 770                         /* make the key case insensitive */
 771                         g_strdown(exts[i]);
 772                         /* use previously dup'd key on overwriting */
 773                         if (g_hash_table_lookup(table, exts[i]))
 774                                 key = exts[i];
 775                         else
 776                                 key = g_strdup(exts[i]);
 777                         g_hash_table_insert(table, key, mime_type);
 778                 }
 779                 g_strfreev(exts);
 780         }
 781
 782         return table;
 783 }
 784
 785 GList *procmime_get_mime_type_list(void)
 786 {
 787         GList *list = NULL;
 788         FILE *fp;
 789         gchar buf[BUFFSIZE];
 790         gchar *p, *delim;
 791         MimeType *mime_type;
 792
 793         if (mime_type_list)
 794                 return mime_type_list;
 795
 796         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
 797                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
 798                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
 799                         return NULL;
 800                 }
 801         }
 802
 803         while (fgets(buf, sizeof(buf), fp) != NULL) {
 804                 p = strchr(buf, '#');
 805                 if (p) *p = '\0';
 806                 g_strstrip(buf);
 807
 808                 p = buf;
 809                 while (*p && !isspace(*p)) p++;
 810                 if (*p) {
 811                         *p = '\0';
 812                         p++;
 813                 }
 814                 delim = strchr(buf, '/');
 815                 if (delim == NULL) continue;
 816                 *delim = '\0';
 817
 818                 mime_type = g_new(MimeType, 1);
 819                 mime_type->type = g_strdup(buf);
 820                 mime_type->sub_type = g_strdup(delim + 1);
 821
 822                 while (*p && isspace(*p)) p++;
 823                 if (*p)
 824                         mime_type->extension = g_strdup(p);
 825                 else
 826                         mime_type->extension = NULL;
 827
 828                 list = g_list_append(list, mime_type);
 829         }
 830
 831         fclose(fp);
 832
 833         if (!list)
 834                 g_warning("Can't read mime.types\n");
 835
 836         return list;
 837 }
 838
 839 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
 840 {
 841         if (!charset)
 842                 return ENC_8BIT;
 843         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
 844                  !strcasecmp(charset, "US-ASCII"))
 845                 return ENC_7BIT;
 846         else if (!strcasecmp(charset, "ISO-8859-5") ||
 847                  !strncasecmp(charset, "KOI8-", 5) ||
 848                  !strcasecmp(charset, "Windows-1251"))
 849                 return ENC_8BIT;
 850         else if (!strncasecmp(charset, "ISO-8859-", 9))
 851                 return ENC_QUOTED_PRINTABLE;
 852         else
 853                 return ENC_8BIT;
 854 }
 855
 856 EncodingType procmime_get_encoding_for_file(const gchar *file)
 857 {
 858         FILE *fp;
 859         guchar buf[BUFSIZ];
 860         size_t len;
 861
 862         if ((fp = fopen(file, "rb")) == NULL) {
 863                 FILE_OP_ERROR(file, "fopen");
 864                 return ENC_UNKNOWN;
 865         }
 866
 867         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
 868                 guchar *p;
 869                 gint i;
 870
 871                 for (p = buf, i = 0; i < len; p++, i++) {
 872                         if (*p & 0x80) {
 873                                 fclose(fp);
 874                                 return ENC_BASE64;
 875                         }
 876                 }
 877         }
 878
 879         fclose(fp);
 880         return ENC_7BIT;
 881 }
 882
 883 struct EncodingTable
 884 {
 885         gchar *str;
 886         EncodingType enc_type;
 887 };
 888
 889 struct EncodingTable encoding_table[] = {
 890         {"7bit", ENC_7BIT},
 891         {"8bit", ENC_8BIT},
 892         {"binary", ENC_BINARY},
 893         {"quoted-printable", ENC_QUOTED_PRINTABLE},
 894         {"base64", ENC_BASE64},
 895         {"x-uuencode", ENC_UNKNOWN},
 896         {NULL, ENC_UNKNOWN},
 897 };
 898
 899 const gchar *procmime_get_encoding_str(EncodingType encoding)
 900 {
 901         struct EncodingTable *enc_table;
 902
 903         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
 904                 if (enc_table->enc_type == encoding)
 905                         return enc_table->str;
 906         }
 907         return NULL;
 908 }
 909
 910 /* --- NEW MIME STUFF --- */
 911 struct TypeTable
 912 {
 913         gchar *str;
 914         MimeMediaType type;
 915 };
 916
 917 static struct TypeTable mime_type_table[] = {
 918         {"text", MIMETYPE_TEXT},
 919         {"image", MIMETYPE_IMAGE},
 920         {"audio", MIMETYPE_AUDIO},
 921         {"video", MIMETYPE_VIDEO},
 922         {"application", MIMETYPE_APPLICATION},
 923         {"message", MIMETYPE_MESSAGE},
 924         {"multipart", MIMETYPE_MULTIPART},
 925         {NULL, 0},
 926 };
 927
 928 const gchar *procmime_get_type_str(MimeMediaType type)
 929 {
 930         struct TypeTable *type_table;
 931
 932         for (type_table = mime_type_table; type_table->str != NULL; type_table++) {
 933                 if (type_table->type == type)
 934                         return type_table->str;
 935         }
 936         return NULL;
 937 }
 938
 939 void procmime_parse_mimepart(MimeInfo *parent,
 940                              gchar *content_type,
 941                              gchar *content_encoding,
 942                              gchar *content_description,
 943                              gchar *content_id,
 944                              gchar *content_disposition,
 945                              const gchar *filename,
 946                              guint offset,
 947                              guint length);
 948
 949 void procmime_parse_message_rfc822(MimeInfo *mimeinfo)
 950 {
 951         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
 952                                 {"Content-Transfer-Encoding:",
 953                                                    NULL, FALSE},
 954                                 {"Content-Description:",
 955                                                    NULL, TRUE},
 956                                 {"Content-ID:",
 957                                                    NULL, TRUE},
 958                                 {"Content-Disposition:",
 959                                                    NULL, TRUE},
 960                                 {NULL,             NULL, FALSE}};
 961         guint content_start, i;
 962         FILE *fp;
 963
 964         if(mimeinfo->encoding_type != ENC_BINARY &&
 965            mimeinfo->encoding_type != ENC_7BIT &&
 966            mimeinfo->encoding_type != ENC_8BIT)
 967                 procmime_decode_content(mimeinfo);
 968
 969         fp = fopen(mimeinfo->filename, "rb");
 970         fseek(fp, mimeinfo->offset, SEEK_SET);
 971         procheader_get_header_fields(fp, hentry);
 972         content_start = ftell(fp);
 973         fclose(fp);
 974
 975         procmime_parse_mimepart(mimeinfo,
 976                                 hentry[0].body, hentry[1].body,
 977                                 hentry[2].body, hentry[3].body,
 978                                 hentry[4].body,
 979                                 mimeinfo->filename, content_start,
 980                                 mimeinfo->length - (content_start - mimeinfo->offset));
 981         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
 982                 g_free(hentry[i].body);
 983                 hentry[i].body = NULL;
 984         }
 985 }
 986
 987 void procmime_parse_multipart(MimeInfo *mimeinfo)
 988 {
 989         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
 990                                 {"Content-Transfer-Encoding:",
 991                                                    NULL, FALSE},
 992                                 {"Content-Description:",
 993                                                    NULL, TRUE},
 994                                 {"Content-ID:",
 995                                                    NULL, TRUE},
 996                                 {"Content-Disposition:",
 997                                                    NULL, TRUE},
 998                                 {NULL,             NULL, FALSE}};
 999         gchar *p;
1000         gchar *boundary;
1001         gint boundary_len = 0, lastoffset = -1, i;
1002         gchar buf[BUFFSIZE];
1003         FILE *fp;
1004
1005         boundary = g_hash_table_lookup(mimeinfo->parameters, "boundary");
1006         if (!boundary)
1007                 return;
1008         boundary_len = strlen(boundary);
1009
1010         if (mimeinfo->encoding_type != ENC_BINARY &&
1011             mimeinfo->encoding_type != ENC_7BIT &&
1012             mimeinfo->encoding_type != ENC_8BIT)
1013                 procmime_decode_content(mimeinfo);
1014
1015         fp = fopen(mimeinfo->filename, "rb");
1016         fseek(fp, mimeinfo->offset, SEEK_SET);
1017         while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
1018                 if (ftell(fp) > (mimeinfo->offset + mimeinfo->length))
1019                         break;
1020
1021                 if (IS_BOUNDARY(buf, boundary, boundary_len)) {
1022                         if (lastoffset != -1) {
1023                                 procmime_parse_mimepart(mimeinfo,
1024                                                         hentry[0].body, hentry[1].body,
1025                                                         hentry[2].body, hentry[3].body,
1026                                                         hentry[4].body,
1027                                                         mimeinfo->filename, lastoffset,
1028                                                         (ftell(fp) - strlen(buf)) - lastoffset);
1029                         }
1030
1031                         if (buf[2 + boundary_len]     == '-' &&
1032                             buf[2 + boundary_len + 1] == '-')
1033                                 break;
1034
1035                         for (i = 0; i < (sizeof hentry / sizeof hentry[0]) ; i++) {
1036                                 g_free(hentry[i].body);
1037                                 hentry[i].body = NULL;
1038                         }
1039                         procheader_get_header_fields(fp, hentry);
1040                         lastoffset = ftell(fp);
1041                 }
1042         }
1043         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1044                 g_free(hentry[i].body);
1045                 hentry[i].body = NULL;
1046         }
1047         fclose(fp);
1048 }
1049
1050 static void add_to_mimeinfo_parameters(gchar **parts, MimeInfo *mimeinfo)
1051 {
1052         gchar **strarray;
1053
1054         for (strarray = parts; *strarray != NULL; strarray++) {
1055                 gchar **parameters_parts;
1056
1057                 parameters_parts = g_strsplit(*strarray, "=", 1);
1058                 if ((parameters_parts[0] != NULL) && (parameters_parts[1] != NULL)) {
1059                         gchar *firstspace;
1060
1061                         g_strstrip(parameters_parts[0]);
1062                         g_strstrip(parameters_parts[1]);
1063                         g_strdown(parameters_parts[0]);
1064                         if(parameters_parts[1][0] == '"')
1065                                 extract_quote(parameters_parts[1], '"');
1066                         else if ((firstspace = strchr(parameters_parts[1], ' ')) != NULL)
1067                                 *firstspace = '\0';
1068                         if(g_hash_table_lookup(mimeinfo->parameters,
1069                                                parameters_parts[0]) == NULL)
1070                                 g_hash_table_insert(mimeinfo->parameters,
1071                                                     g_strdup(parameters_parts[0]),
1072                                                     g_strdup(parameters_parts[1]));
1073                 }
1074                 g_strfreev(parameters_parts);
1075         }
1076 }
1077
1078 static void procmime_parse_content_type(const gchar *content_type, MimeInfo *mimeinfo)
1079 {
1080         gchar **content_type_parts;
1081         gchar **strarray;
1082         gchar *str;
1083         struct TypeTable *typetablearray;
1084
1085         g_return_if_fail(content_type != NULL);
1086         g_return_if_fail(mimeinfo != NULL);
1087
1088         /* Split content type into parts and remove trailing
1089            and leading whitespaces from all strings */
1090         content_type_parts = g_strsplit(content_type, ";", 0);
1091         for (strarray = content_type_parts; *strarray != NULL; strarray++) {
1092                 g_strstrip(*strarray);
1093         }
1094
1095         /* Get mimeinfo->type and mimeinfo->subtype */
1096         mimeinfo->type = MIMETYPE_UNKNOWN;
1097         str = content_type_parts[0];
1098         if (str == NULL) {
1099                 g_strfreev(content_type_parts);
1100                 return;
1101         }
1102         for (typetablearray = mime_type_table; typetablearray->str != NULL; typetablearray++) {
1103                 if (g_strncasecmp(str, typetablearray->str, strlen(typetablearray->str)) == 0 &&
1104                     str[strlen(typetablearray->str)] == '/') {
1105                         mimeinfo->type = typetablearray->type;
1106                         mimeinfo->subtype = g_strdup(str + strlen(typetablearray->str) + 1);
1107                         break;
1108                 }
1109         }
1110
1111         /* Get mimeinfo->parmeters */
1112         add_to_mimeinfo_parameters(&content_type_parts[1], mimeinfo);
1113         g_strfreev(content_type_parts);
1114 }
1115
1116 static void procmime_parse_content_disposition(const gchar *content_disposition, MimeInfo *mimeinfo)
1117 {
1118         gchar **content_disp_parts;
1119         gchar **strarray;
1120         gchar *str;
1121
1122         g_return_if_fail(content_disposition != NULL);
1123         g_return_if_fail(mimeinfo != NULL);
1124
1125         /* Split into parts and remove trailing
1126            and leading whitespaces from all strings */
1127         content_disp_parts = g_strsplit(content_disposition, ";", 0);
1128         for (strarray = content_disp_parts; *strarray != NULL; strarray++) {
1129                 g_strstrip(*strarray);
1130         }
1131         /* Get mimeinfo->disposition */
1132         str = content_disp_parts[0];
1133         if (str == NULL) {
1134                 g_strfreev(content_disp_parts);
1135                 return;
1136         }
1137         if (!g_strcasecmp(str, "inline"))
1138                 mimeinfo->disposition = DISPOSITIONTYPE_INLINE;
1139         else if (!g_strcasecmp(str, "attachment"))
1140                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1141         else
1142                 mimeinfo->disposition = DISPOSITIONTYPE_UNKNOWN;
1143
1144         add_to_mimeinfo_parameters(&content_disp_parts[1], mimeinfo);
1145         g_strfreev(content_disp_parts);
1146 }
1147
1148
1149 static void procmime_parse_content_encoding(const gchar *content_encoding, MimeInfo *mimeinfo)
1150 {
1151         struct EncodingTable *enc_table;
1152
1153         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1154                 if (g_strcasecmp(enc_table->str, content_encoding) == 0) {
1155                         mimeinfo->encoding_type = enc_table->enc_type;
1156                         return;
1157                 }
1158         }
1159         mimeinfo->encoding_type = ENC_UNKNOWN;
1160         return;
1161 }
1162
1163 void procmime_parse_mimepart(MimeInfo *parent,
1164                              gchar *content_type,
1165                              gchar *content_encoding,
1166                              gchar *content_description,
1167                              gchar *content_id,
1168                              gchar *content_disposition,
1169                              const gchar *filename,
1170                              guint offset,
1171                              guint length)
1172 {
1173         MimeInfo *mimeinfo;
1174
1175         /* Create MimeInfo */
1176         mimeinfo = procmime_mimeinfo_new();
1177         if (parent != NULL)
1178                 g_node_append(parent->node, mimeinfo->node);
1179         mimeinfo->filename = g_strdup(filename);
1180         mimeinfo->offset = offset;
1181         mimeinfo->length = length;
1182
1183         if (content_type != NULL) {
1184                 procmime_parse_content_type(content_type, mimeinfo);
1185         } else {
1186                 mimeinfo->type = MIMETYPE_TEXT;
1187                 mimeinfo->subtype = g_strdup("plain");
1188                 g_hash_table_insert(mimeinfo->parameters, g_strdup("charset"), g_strdup("us-ascii"));
1189         }
1190
1191         if (content_encoding != NULL) {
1192                 procmime_parse_content_encoding(content_encoding, mimeinfo);
1193         } else {
1194                 mimeinfo->encoding_type = ENC_7BIT;
1195         }
1196
1197         if (content_description != NULL)
1198                 mimeinfo->description = g_strdup(content_description);
1199         else
1200                 mimeinfo->description = NULL;
1201
1202         if (content_id != NULL)
1203                 mimeinfo->id = g_strdup(content_id);
1204         else
1205                 mimeinfo->id = NULL;
1206
1207         if (content_disposition != NULL)
1208                 procmime_parse_content_disposition(content_disposition, mimeinfo);
1209         else
1210                 mimeinfo->disposition = DISPOSITIONTYPE_INLINE;
1211
1212         /* Call parser for mime type */
1213         switch (mimeinfo->type) {
1214                 case MIMETYPE_MESSAGE:
1215                         if (g_strcasecmp(mimeinfo->subtype, "rfc822") == 0) {
1216                                 procmime_parse_message_rfc822(mimeinfo);
1217                         }
1218                         break;
1219
1220                 case MIMETYPE_MULTIPART:
1221                         procmime_parse_multipart(mimeinfo);
1222                         break;
1223
1224                 default:
1225                         break;
1226         }
1227 }
1228
1229 static gchar *typenames[] = {
1230     "text",
1231     "image",
1232     "audio",
1233     "video",
1234     "application",
1235     "message",
1236     "multipart",
1237     "unknown",
1238 };
1239
1240 static gboolean output_func(GNode *node, gpointer data)
1241 {
1242         guint i, depth;
1243         MimeInfo *mimeinfo = (MimeInfo *) node->data;
1244
1245         depth = g_node_depth(node);
1246         for(i = 0; i < depth; i++)
1247                 printf("    ");
1248         printf("%s/%s (offset:%d length:%d encoding: %d)\n", typenames[mimeinfo->type], mimeinfo->subtype, mimeinfo->offset, mimeinfo->length, mimeinfo->encoding_type);
1249
1250         return FALSE;
1251 }
1252
1253 static void output_mime_structure(MimeInfo *mimeinfo, int indent)
1254 {
1255         g_node_traverse(mimeinfo->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1, output_func, NULL);
1256 }
1257
1258 static MimeInfo *procmime_scan_file_with_offset(const gchar *filename, int offset)
1259 {
1260         MimeInfo *mimeinfo;
1261         struct stat buf;
1262
1263         stat(filename, &buf);
1264
1265         mimeinfo = procmime_mimeinfo_new();
1266         mimeinfo->encoding_type = ENC_BINARY;
1267         mimeinfo->type = MIMETYPE_MESSAGE;
1268         mimeinfo->subtype = g_strdup("rfc822");
1269         mimeinfo->filename = g_strdup(filename);
1270         mimeinfo->offset = offset;
1271         mimeinfo->length = buf.st_size - offset;
1272
1273         procmime_parse_message_rfc822(mimeinfo);
1274         if (debug_get_mode())
1275                 output_mime_structure(mimeinfo, 0);
1276
1277         return mimeinfo;
1278 }
1279
1280 MimeInfo *procmime_scan_file(gchar *filename)
1281 {
1282         MimeInfo *mimeinfo;
1283
1284         g_return_val_if_fail(filename != NULL, NULL);
1285
1286         mimeinfo = procmime_scan_file_with_offset(filename, 0);
1287
1288         return mimeinfo;
1289 }
1290
1291 MimeInfo *procmime_scan_queue_file(gchar *filename)
1292 {
1293         FILE *fp;
1294         MimeInfo *mimeinfo;
1295         gchar buf[BUFFSIZE];
1296         gint offset = 0;
1297
1298         g_return_val_if_fail(filename != NULL, NULL);
1299
1300         /* Open file */
1301         if((fp = fopen(filename, "rb")) == NULL)
1302                 return NULL;
1303         /* Skip queue header */
1304         while (fgets(buf, sizeof(buf), fp) != NULL)
1305                 if (buf[0] == '\r' || buf[0] == '\n') break;
1306         offset = ftell(fp);
1307         fclose(fp);
1308
1309         mimeinfo = procmime_scan_file_with_offset(filename, offset);
1310
1311         return mimeinfo;
1312 }