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         mimeinfo->disposition   = DISPOSITIONTYPE_UNKNOWN;
  60
  61         mimeinfo->parameters = g_hash_table_new(g_str_hash, g_str_equal);
  62         mimeinfo->node       = g_node_new(mimeinfo);
  63
  64         return mimeinfo;
  65 }
  66
  67 static gboolean procmime_mimeinfo_parameters_destroy(gpointer key, gpointer value, gpointer user_data)
  68 {
  69         g_free(key);
  70         g_free(value);
  71
  72         return TRUE;
  73 }
  74
  75 static gboolean free_func(GNode *node, gpointer data)
  76 {
  77         MimeInfo *mimeinfo = (MimeInfo *) node->data;
  78
  79         if(mimeinfo->tmpfile)
  80                 unlink(mimeinfo->filename);
  81         g_free(mimeinfo->filename);
  82
  83         g_free(mimeinfo->subtype);
  84         g_free(mimeinfo->description);
  85         g_free(mimeinfo->id);
  86
  87         g_hash_table_foreach_remove(mimeinfo->parameters, procmime_mimeinfo_parameters_destroy, NULL);
  88         g_hash_table_destroy(mimeinfo->parameters);
  89
  90         if (mimeinfo->privacy)
  91                 privacy_free_privacydata(mimeinfo->privacy);
  92
  93         g_free(mimeinfo);
  94
  95         return FALSE;
  96 }
  97
  98 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  99 {
 100         GNode *node;
 101
 102         g_return_if_fail(mimeinfo);
 103
 104         node = mimeinfo->node;
 105         g_node_traverse(node, G_IN_ORDER, G_TRAVERSE_ALL, -1, free_func, NULL);
 106
 107         g_node_destroy(node);
 108 }
 109
 110 #if 0 /* UNUSED */
 111 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 112 {
 113         MimeInfo *child = parent->children;
 114
 115         if (!child)
 116                 parent->children = mimeinfo;
 117         else {
 118                 while (child->next != NULL)
 119                         child = child->next;
 120
 121                 child->next = mimeinfo;
 122         }
 123
 124         mimeinfo->parent = parent;
 125         mimeinfo->level = parent->level + 1;
 126
 127         return mimeinfo;
 128 }
 129
 130 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 131 {
 132         MimeInfo *parent = old->parent;
 133         MimeInfo *child;
 134
 135         g_return_if_fail(parent != NULL);
 136         g_return_if_fail(new->next == NULL);
 137
 138         for (child = parent->children; child && child != old;
 139              child = child->next)
 140                 ;
 141         if (!child) {
 142                 g_warning("oops: parent can't find it's own child");
 143                 return;
 144         }
 145         procmime_mimeinfo_free_all(old);
 146
 147         if (child == parent->children) {
 148                 new->next = parent->children->next;
 149                 parent->children = new;
 150         } else {
 151                 new->next = child->next;
 152                 child = new;
 153         }
 154 }
 155 #endif
 156
 157 MimeInfo *procmime_mimeinfo_parent(MimeInfo *mimeinfo)
 158 {
 159         g_return_val_if_fail(mimeinfo != NULL, NULL);
 160
 161         if (mimeinfo->node->parent == NULL)
 162                 return NULL;
 163         return (MimeInfo *) mimeinfo->node->parent->data;
 164 }
 165
 166 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 167 {
 168         g_return_val_if_fail(mimeinfo != NULL, NULL);
 169         g_return_val_if_fail(mimeinfo->node != NULL, NULL);
 170
 171         if (mimeinfo->node->children)
 172                 return (MimeInfo *) mimeinfo->node->children->data;
 173         if (mimeinfo->node->next)
 174                 return (MimeInfo *) mimeinfo->node->next->data;
 175
 176         if (mimeinfo->node->parent == NULL)
 177                 return NULL;
 178
 179         while (mimeinfo->node->parent != NULL) {
 180                 mimeinfo = (MimeInfo *) mimeinfo->node->parent->data;
 181                 if (mimeinfo->node->next)
 182                         return (MimeInfo *) mimeinfo->node->next->data;
 183         }
 184
 185         return NULL;
 186 }
 187
 188 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 189 {
 190         gchar *filename;
 191         MimeInfo *mimeinfo;
 192
 193         filename = procmsg_get_message_file(msginfo);
 194         if(!filename)
 195                 return NULL;
 196         if (msginfo->folder->stype != F_QUEUE &&
 197             msginfo->folder->stype != F_DRAFT)
 198                 mimeinfo = procmime_scan_file(filename);
 199         else
 200                 mimeinfo = procmime_scan_queue_file(filename);
 201         g_free(filename);
 202
 203         return mimeinfo;
 204 }
 205
 206 enum
 207 {
 208         H_CONTENT_TRANSFER_ENCODING = 0,
 209         H_CONTENT_TYPE              = 1,
 210         H_CONTENT_DISPOSITION       = 2,
 211         H_CONTENT_DESCRIPTION       = 3,
 212         H_SUBJECT                   = 4
 213 };
 214
 215 const gchar *procmime_mimeinfo_get_parameter(MimeInfo *mimeinfo, const gchar *name)
 216 {
 217         g_return_val_if_fail(mimeinfo != NULL, NULL);
 218         g_return_val_if_fail(name != NULL, NULL);
 219
 220         return g_hash_table_lookup(mimeinfo->parameters, name);
 221 }
 222
 223 gboolean procmime_decode_content(MimeInfo *mimeinfo)
 224 {
 225         gchar buf[BUFFSIZE];
 226         gint readend;
 227         gchar *tmpfilename;
 228         gchar *mimetmpdir;
 229         FILE *outfp, *infp;
 230         struct stat statbuf;
 231
 232         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 233
 234         if(mimeinfo->encoding_type == ENC_BINARY)
 235                 return TRUE;
 236
 237         infp = fopen(mimeinfo->filename, "rb");
 238         if(!infp) {
 239                 perror("fopen");
 240                 return FALSE;
 241         }
 242         fseek(infp, mimeinfo->offset, SEEK_SET);
 243
 244         mimetmpdir = get_mime_tmp_dir();
 245         outfp = get_tmpfile_in_dir(mimetmpdir, &tmpfilename);
 246         if (!outfp) {
 247                 perror("tmpfile");
 248                 return FALSE;
 249         }
 250
 251         readend = mimeinfo->offset + mimeinfo->length;
 252
 253         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 254                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 255                         gint len;
 256                         len = qp_decode_line(buf);
 257                         fwrite(buf, len, 1, outfp);
 258                 }
 259         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 260                 gchar outbuf[BUFFSIZE];
 261                 gint len;
 262                 Base64Decoder *decoder;
 263
 264                 decoder = base64_decoder_new();
 265                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 266                         len = base64_decoder_decode(decoder, buf, outbuf);
 267                         if (len < 0) {
 268                                 g_warning("Bad BASE64 content\n");
 269                                 break;
 270                         }
 271                         fwrite(outbuf, sizeof(gchar), len, outfp);
 272                 }
 273                 base64_decoder_free(decoder);
 274         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 275                 gchar outbuf[BUFFSIZE];
 276                 gint len;
 277                 gboolean flag = FALSE;
 278
 279                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 280                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 281
 282                         if (flag) {
 283                                 len = fromuutobits(outbuf, buf);
 284                                 if (len <= 0) {
 285                                         if (len < 0)
 286                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 287                                         break;
 288                                 }
 289                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 290                         } else
 291                                 flag = TRUE;
 292                 }
 293         } else {
 294                 while ((ftell(infp) < readend) && (fgets(buf, sizeof(buf), infp) != NULL)) {
 295                         fputs(buf, outfp);
 296                 }
 297         }
 298
 299         fclose(outfp);
 300         fclose(infp);
 301
 302         stat(tmpfilename, &statbuf);
 303         if(mimeinfo->tmpfile)
 304                 unlink(mimeinfo->filename);
 305         g_free(mimeinfo->filename);
 306         mimeinfo->filename = tmpfilename;
 307         mimeinfo->tmpfile = TRUE;
 308         mimeinfo->offset = 0;
 309         mimeinfo->length = statbuf.st_size;
 310         mimeinfo->encoding_type = ENC_BINARY;
 311
 312         return TRUE;
 313 }
 314
 315 gint procmime_get_part(const gchar *outfile, MimeInfo *mimeinfo)
 316 {
 317         FILE *infp, *outfp;
 318         gchar buf[BUFFSIZE];
 319         gint restlength, readlength;
 320
 321         g_return_val_if_fail(outfile != NULL, -1);
 322         g_return_val_if_fail(mimeinfo != NULL, -1);
 323
 324         if(mimeinfo->encoding_type != ENC_BINARY && !procmime_decode_content(mimeinfo))
 325                 return -1;
 326
 327         if ((infp = fopen(mimeinfo->filename, "rb")) == NULL) {
 328                 FILE_OP_ERROR(mimeinfo->filename, "fopen");
 329                 return -1;
 330         }
 331         if (fseek(infp, mimeinfo->offset, SEEK_SET) < 0) {
 332                 FILE_OP_ERROR(mimeinfo->filename, "fseek");
 333                 fclose(infp);
 334                 return -1;
 335         }
 336         if ((outfp = fopen(outfile, "wb")) == NULL) {
 337                 FILE_OP_ERROR(outfile, "fopen");
 338                 fclose(infp);
 339                 return -1;
 340         }
 341
 342         restlength = mimeinfo->length;
 343
 344         while ((restlength > 0) && ((readlength = fread(buf, 1, restlength > BUFFSIZE ? BUFFSIZE : restlength, infp)) > 0)) {
 345                 fwrite(buf, 1, readlength, outfp);
 346                 restlength -= readlength;
 347         }
 348
 349         fclose(infp);
 350         if (fclose(outfp) == EOF) {
 351                 FILE_OP_ERROR(outfile, "fclose");
 352                 unlink(outfile);
 353                 return -1;
 354         }
 355
 356         return 0;
 357 }
 358
 359 struct ContentRenderer {
 360         char * content_type;
 361         char * renderer;
 362 };
 363
 364 static GList * renderer_list = NULL;
 365
 366 static struct ContentRenderer *
 367 content_renderer_new(char * content_type, char * renderer)
 368 {
 369         struct ContentRenderer * cr;
 370
 371         cr = g_new(struct ContentRenderer, 1);
 372         if (cr == NULL)
 373                 return NULL;
 374
 375         cr->content_type = g_strdup(content_type);
 376         cr->renderer = g_strdup(renderer);
 377
 378         return cr;
 379 }
 380
 381 static void content_renderer_free(struct ContentRenderer * cr)
 382 {
 383         g_free(cr->content_type);
 384         g_free(cr->renderer);
 385         g_free(cr);
 386 }
 387
 388 void renderer_read_config(void)
 389 {
 390         gchar buf[BUFFSIZE];
 391         FILE * f;
 392         gchar * rcpath;
 393
 394         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 395         renderer_list = NULL;
 396
 397         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 398         f = fopen(rcpath, "rb");
 399         g_free(rcpath);
 400
 401         if (f == NULL)
 402                 return;
 403
 404         while (fgets(buf, BUFFSIZE, f)) {
 405                 char * p;
 406                 struct ContentRenderer * cr;
 407
 408                 strretchomp(buf);
 409                 p = strchr(buf, ' ');
 410                 if (p == NULL)
 411                         continue;
 412                 * p = 0;
 413
 414                 cr = content_renderer_new(buf, p + 1);
 415                 if (cr == NULL)
 416                         continue;
 417
 418                 renderer_list = g_list_append(renderer_list, cr);
 419         }
 420
 421         fclose(f);
 422 }
 423
 424 void renderer_write_config(void)
 425 {
 426         gchar * rcpath;
 427         PrefFile *pfile;
 428         GList * cur;
 429
 430         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 431
 432         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 433                 g_warning("failed to write configuration to file\n");
 434                 g_free(rcpath);
 435                 return;
 436         }
 437
 438         g_free(rcpath);
 439
 440         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 441                 struct ContentRenderer * renderer;
 442                 renderer = cur->data;
 443                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 444                         renderer->renderer);
 445         }
 446
 447         if (prefs_file_close(pfile) < 0) {
 448                 g_warning("failed to write configuration to file\n");
 449                 return;
 450         }
 451 }
 452
 453 FILE *procmime_get_text_content(MimeInfo *mimeinfo)
 454 {
 455         FILE *tmpfp, *outfp;
 456         const gchar *src_codeset;
 457         gboolean conv_fail = FALSE;
 458         gchar buf[BUFFSIZE];
 459         gchar *str;
 460         struct ContentRenderer * renderer;
 461         GList * cur;
 462         gchar *tmpfile, *content_type;
 463
 464         g_return_val_if_fail(mimeinfo != NULL, NULL);
 465
 466         if (!procmime_decode_content(mimeinfo))
 467                 return NULL;
 468
 469         tmpfile = procmime_get_tmp_file_name(mimeinfo);
 470         if (tmpfile == NULL)
 471                 return NULL;
 472
 473         if (procmime_get_part(tmpfile, mimeinfo) < 0) {
 474                 g_free(tmpfile);
 475                 return NULL;
 476         }
 477
 478         tmpfp = fopen(tmpfile, "rb");
 479         if (tmpfp == NULL) {
 480                 g_free(tmpfile);
 481                 return NULL;
 482         }
 483
 484         if ((outfp = my_tmpfile()) == NULL) {
 485                 perror("tmpfile");
 486                 fclose(tmpfp);
 487                 g_free(tmpfile);
 488                 return NULL;
 489         }
 490
 491         src_codeset = prefs_common.force_charset
 492                 ? prefs_common.force_charset :
 493                 procmime_mimeinfo_get_parameter(mimeinfo, "charset");
 494
 495         renderer = NULL;
 496
 497         content_type = g_strdup_printf("%s/%s", procmime_get_type_str(mimeinfo->type),
 498                 mimeinfo->subtype);
 499         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 500                 struct ContentRenderer * cr;
 501
 502                 cr = cur->data;
 503                 if (g_strcasecmp(cr->content_type, content_type) == 0) {
 504                         renderer = cr;
 505                         break;
 506                 }
 507         }
 508         g_free(content_type);
 509
 510         if (renderer != NULL) {
 511                 FILE * p;
 512                 int oldout;
 513
 514                 oldout = dup(1);
 515
 516                 dup2(fileno(outfp), 1);
 517
 518                 p = popen(renderer->renderer, "w");
 519                 if (p != NULL) {
 520                         size_t count;
 521
 522                         while ((count =
 523                                 fread(buf, sizeof(char), sizeof(buf),
 524                                       tmpfp)) > 0)
 525                                 fwrite(buf, sizeof(char), count, p);
 526                         pclose(p);
 527                 }
 528
 529                 dup2(oldout, 1);
 530         } else if (mimeinfo->type == MIMETYPE_TEXT && !g_strcasecmp(mimeinfo->subtype, "html")) {
 531                 HTMLParser *parser;
 532                 CodeConverter *conv;
 533
 534                 conv = conv_code_converter_new(src_codeset);
 535                 parser = html_parser_new(tmpfp, conv);
 536                 while ((str = html_parse(parser)) != NULL) {
 537                         fputs(str, outfp);
 538                 }
 539                 html_parser_destroy(parser);
 540                 conv_code_converter_destroy(conv);
 541         } else if (mimeinfo->type == MIMETYPE_TEXT && !g_strcasecmp(mimeinfo->subtype, "enriched")) {
 542                 ERTFParser *parser;
 543                 CodeConverter *conv;
 544
 545                 conv = conv_code_converter_new(src_codeset);
 546                 parser = ertf_parser_new(tmpfp, conv);
 547                 while ((str = ertf_parse(parser)) != NULL) {
 548                         fputs(str, outfp);
 549                 }
 550                 ertf_parser_destroy(parser);
 551                 conv_code_converter_destroy(conv);
 552         } else if (mimeinfo->type == MIMETYPE_TEXT) {
 553                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 554                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 555                         if (str) {
 556                                 fputs(str, outfp);
 557                                 g_free(str);
 558                         } else {
 559                                 conv_fail = TRUE;
 560                                 fputs(buf, outfp);
 561                         }
 562                 }
 563         }
 564
 565         if (conv_fail)
 566                 g_warning("procmime_get_text_content(): Code conversion failed.\n");
 567
 568         fclose(tmpfp);
 569         rewind(outfp);
 570         unlink(tmpfile);
 571         g_free(tmpfile);
 572
 573         return outfp;
 574 }
 575
 576 /* search the first text part of (multipart) MIME message,
 577    decode, convert it and output to outfp. */
 578 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 579 {
 580         FILE *outfp = NULL;
 581         MimeInfo *mimeinfo, *partinfo;
 582
 583         g_return_val_if_fail(msginfo != NULL, NULL);
 584
 585         mimeinfo = procmime_scan_message(msginfo);
 586         if (!mimeinfo) return NULL;
 587
 588         partinfo = mimeinfo;
 589         while (partinfo && partinfo->type != MIMETYPE_TEXT)
 590                 partinfo = procmime_mimeinfo_next(partinfo);
 591
 592         if (partinfo)
 593                 outfp = procmime_get_text_content(partinfo);
 594
 595         procmime_mimeinfo_free_all(mimeinfo);
 596
 597         return outfp;
 598 }
 599
 600 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 601                                    const gchar *str, gboolean case_sens)
 602 {
 603         FILE *outfp;
 604         gchar buf[BUFFSIZE];
 605         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 606
 607         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 608         g_return_val_if_fail(mimeinfo->type == MIMETYPE_TEXT, FALSE);
 609         g_return_val_if_fail(str != NULL, FALSE);
 610
 611         outfp = procmime_get_text_content(mimeinfo);
 612
 613         if (!outfp)
 614                 return FALSE;
 615
 616         if (case_sens)
 617                 StrFindFunc = strstr;
 618         else
 619                 StrFindFunc = strcasestr;
 620
 621         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 622                 if (StrFindFunc(buf, str) != NULL) {
 623                         fclose(outfp);
 624                         return TRUE;
 625                 }
 626         }
 627
 628         fclose(outfp);
 629
 630         return FALSE;
 631 }
 632
 633 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
 634                               gboolean case_sens)
 635 {
 636         MimeInfo *mimeinfo;
 637         MimeInfo *partinfo;
 638         gchar *filename;
 639         gboolean found = FALSE;
 640
 641         g_return_val_if_fail(msginfo != NULL, FALSE);
 642         g_return_val_if_fail(str != NULL, FALSE);
 643
 644         filename = procmsg_get_message_file(msginfo);
 645         if (!filename) return FALSE;
 646         mimeinfo = procmime_scan_message(msginfo);
 647
 648         for (partinfo = mimeinfo; partinfo != NULL;
 649              partinfo = procmime_mimeinfo_next(partinfo)) {
 650                 if (partinfo->type == MIMETYPE_TEXT) {
 651                         if (procmime_find_string_part
 652                                 (partinfo, filename, str, case_sens) == TRUE) {
 653                                 found = TRUE;
 654                                 break;
 655                         }
 656                 }
 657         }
 658
 659         procmime_mimeinfo_free_all(mimeinfo);
 660         g_free(filename);
 661
 662         return found;
 663 }
 664
 665 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
 666 {
 667         static guint32 id = 0;
 668         gchar *base;
 669         gchar *filename;
 670         gchar f_prefix[10];
 671
 672         g_return_val_if_fail(mimeinfo != NULL, NULL);
 673
 674         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
 675
 676         if ((mimeinfo->type == MIMETYPE_TEXT) && !g_strcasecmp(mimeinfo->subtype, "html"))
 677                 base = "mimetmp.html";
 678         else {
 679                 const gchar *basetmp;
 680
 681                 basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "filename");
 682                 if (basetmp == NULL)
 683                         basetmp = procmime_mimeinfo_get_parameter(mimeinfo, "name");
 684                 if (basetmp == NULL)
 685                         basetmp = "mimetmp";
 686                 base = g_basename(basetmp);
 687                 if (*base == '\0') base = "mimetmp";
 688                 Xstrdup_a(base, base, return NULL);
 689                 subst_for_shellsafe_filename(base);
 690         }
 691
 692         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 693                                f_prefix, base, NULL);
 694
 695         return filename;
 696 }
 697
 698 static GList *mime_type_list = NULL;
 699
 700 gchar *procmime_get_mime_type(const gchar *filename)
 701 {
 702         static GHashTable *mime_type_table = NULL;
 703         MimeType *mime_type;
 704         const gchar *p;
 705         gchar *ext;
 706
 707         if (!mime_type_table) {
 708                 mime_type_table = procmime_get_mime_type_table();
 709                 if (!mime_type_table) return NULL;
 710         }
 711
 712         filename = g_basename(filename);
 713         p = strrchr(filename, '.');
 714         if (!p) return NULL;
 715
 716         Xstrdup_a(ext, p + 1, return NULL);
 717         g_strdown(ext);
 718         mime_type = g_hash_table_lookup(mime_type_table, ext);
 719         if (mime_type) {
 720                 gchar *str;
 721
 722                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
 723                                   NULL);
 724                 return str;
 725         }
 726
 727         return NULL;
 728 }
 729
 730 static guint procmime_str_hash(gconstpointer gptr)
 731 {
 732         guint hash_result = 0;
 733         const char *str;
 734
 735         for (str = gptr; str && *str; str++) {
 736                 if (isupper(*str)) hash_result += (*str + ' ');
 737                 else hash_result += *str;
 738         }
 739
 740         return hash_result;
 741 }
 742
 743 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
 744 {
 745         const char *str1 = gptr1;
 746         const char *str2 = gptr2;
 747
 748         return !strcasecmp(str1, str2);
 749 }
 750
 751 static GHashTable *procmime_get_mime_type_table(void)
 752 {
 753         GHashTable *table = NULL;
 754         GList *cur;
 755         MimeType *mime_type;
 756         gchar **exts;
 757
 758         if (!mime_type_list) {
 759                 mime_type_list = procmime_get_mime_type_list();
 760                 if (!mime_type_list) return NULL;
 761         }
 762
 763         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
 764
 765         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
 766                 gint i;
 767                 gchar *key;
 768
 769                 mime_type = (MimeType *)cur->data;
 770
 771                 if (!mime_type->extension) continue;
 772
 773                 exts = g_strsplit(mime_type->extension, " ", 16);
 774                 for (i = 0; exts[i] != NULL; i++) {
 775                         /* make the key case insensitive */
 776                         g_strdown(exts[i]);
 777                         /* use previously dup'd key on overwriting */
 778                         if (g_hash_table_lookup(table, exts[i]))
 779                                 key = exts[i];
 780                         else
 781                                 key = g_strdup(exts[i]);
 782                         g_hash_table_insert(table, key, mime_type);
 783                 }
 784                 g_strfreev(exts);
 785         }
 786
 787         return table;
 788 }
 789
 790 GList *procmime_get_mime_type_list(void)
 791 {
 792         GList *list = NULL;
 793         FILE *fp;
 794         gchar buf[BUFFSIZE];
 795         gchar *p, *delim;
 796         MimeType *mime_type;
 797
 798         if (mime_type_list)
 799                 return mime_type_list;
 800
 801         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
 802                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
 803                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
 804                         return NULL;
 805                 }
 806         }
 807
 808         while (fgets(buf, sizeof(buf), fp) != NULL) {
 809                 p = strchr(buf, '#');
 810                 if (p) *p = '\0';
 811                 g_strstrip(buf);
 812
 813                 p = buf;
 814                 while (*p && !isspace(*p)) p++;
 815                 if (*p) {
 816                         *p = '\0';
 817                         p++;
 818                 }
 819                 delim = strchr(buf, '/');
 820                 if (delim == NULL) continue;
 821                 *delim = '\0';
 822
 823                 mime_type = g_new(MimeType, 1);
 824                 mime_type->type = g_strdup(buf);
 825                 mime_type->sub_type = g_strdup(delim + 1);
 826
 827                 while (*p && isspace(*p)) p++;
 828                 if (*p)
 829                         mime_type->extension = g_strdup(p);
 830                 else
 831                         mime_type->extension = NULL;
 832
 833                 list = g_list_append(list, mime_type);
 834         }
 835
 836         fclose(fp);
 837
 838         if (!list)
 839                 g_warning("Can't read mime.types\n");
 840
 841         return list;
 842 }
 843
 844 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
 845 {
 846         if (!charset)
 847                 return ENC_8BIT;
 848         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
 849                  !strcasecmp(charset, "US-ASCII"))
 850                 return ENC_7BIT;
 851         else if (!strcasecmp(charset, "ISO-8859-5") ||
 852                  !strncasecmp(charset, "KOI8-", 5) ||
 853                  !strcasecmp(charset, "Windows-1251"))
 854                 return ENC_8BIT;
 855         else if (!strncasecmp(charset, "ISO-8859-", 9))
 856                 return ENC_QUOTED_PRINTABLE;
 857         else
 858                 return ENC_8BIT;
 859 }
 860
 861 EncodingType procmime_get_encoding_for_file(const gchar *file)
 862 {
 863         FILE *fp;
 864         guchar buf[BUFSIZ];
 865         size_t len;
 866
 867         if ((fp = fopen(file, "rb")) == NULL) {
 868                 FILE_OP_ERROR(file, "fopen");
 869                 return ENC_UNKNOWN;
 870         }
 871
 872         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
 873                 guchar *p;
 874                 gint i;
 875
 876                 for (p = buf, i = 0; i < len; p++, i++) {
 877                         if (*p & 0x80) {
 878                                 fclose(fp);
 879                                 return ENC_BASE64;
 880                         }
 881                 }
 882         }
 883
 884         fclose(fp);
 885         return ENC_7BIT;
 886 }
 887
 888 struct EncodingTable
 889 {
 890         gchar *str;
 891         EncodingType enc_type;
 892 };
 893
 894 struct EncodingTable encoding_table[] = {
 895         {"7bit", ENC_7BIT},
 896         {"8bit", ENC_8BIT},
 897         {"binary", ENC_BINARY},
 898         {"quoted-printable", ENC_QUOTED_PRINTABLE},
 899         {"base64", ENC_BASE64},
 900         {"x-uuencode", ENC_UNKNOWN},
 901         {NULL, ENC_UNKNOWN},
 902 };
 903
 904 const gchar *procmime_get_encoding_str(EncodingType encoding)
 905 {
 906         struct EncodingTable *enc_table;
 907
 908         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
 909                 if (enc_table->enc_type == encoding)
 910                         return enc_table->str;
 911         }
 912         return NULL;
 913 }
 914
 915 /* --- NEW MIME STUFF --- */
 916 struct TypeTable
 917 {
 918         gchar *str;
 919         MimeMediaType type;
 920 };
 921
 922 static struct TypeTable mime_type_table[] = {
 923         {"text", MIMETYPE_TEXT},
 924         {"image", MIMETYPE_IMAGE},
 925         {"audio", MIMETYPE_AUDIO},
 926         {"video", MIMETYPE_VIDEO},
 927         {"application", MIMETYPE_APPLICATION},
 928         {"message", MIMETYPE_MESSAGE},
 929         {"multipart", MIMETYPE_MULTIPART},
 930         {NULL, 0},
 931 };
 932
 933 const gchar *procmime_get_type_str(MimeMediaType type)
 934 {
 935         struct TypeTable *type_table;
 936
 937         for (type_table = mime_type_table; type_table->str != NULL; type_table++) {
 938                 if (type_table->type == type)
 939                         return type_table->str;
 940         }
 941         return NULL;
 942 }
 943
 944 void procmime_parse_mimepart(MimeInfo *parent,
 945                              gchar *content_type,
 946                              gchar *content_encoding,
 947                              gchar *content_description,
 948                              gchar *content_id,
 949                              gchar *content_disposition,
 950                              const gchar *filename,
 951                              guint offset,
 952                              guint length);
 953
 954 void procmime_parse_message_rfc822(MimeInfo *mimeinfo)
 955 {
 956         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
 957                                 {"Content-Transfer-Encoding:",
 958                                                    NULL, FALSE},
 959                                 {"Content-Description:",
 960                                                    NULL, TRUE},
 961                                 {"Content-ID:",
 962                                                    NULL, TRUE},
 963                                 {"Content-Disposition:",
 964                                                    NULL, TRUE},
 965                                 {NULL,             NULL, FALSE}};
 966         guint content_start, i;
 967         FILE *fp;
 968
 969         if(mimeinfo->encoding_type != ENC_BINARY &&
 970            mimeinfo->encoding_type != ENC_7BIT &&
 971            mimeinfo->encoding_type != ENC_8BIT)
 972                 procmime_decode_content(mimeinfo);
 973
 974         fp = fopen(mimeinfo->filename, "rb");
 975         fseek(fp, mimeinfo->offset, SEEK_SET);
 976         procheader_get_header_fields(fp, hentry);
 977         content_start = ftell(fp);
 978         fclose(fp);
 979
 980         procmime_parse_mimepart(mimeinfo,
 981                                 hentry[0].body, hentry[1].body,
 982                                 hentry[2].body, hentry[3].body,
 983                                 hentry[4].body,
 984                                 mimeinfo->filename, content_start,
 985                                 mimeinfo->length - (content_start - mimeinfo->offset));
 986         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
 987                 g_free(hentry[i].body);
 988                 hentry[i].body = NULL;
 989         }
 990 }
 991
 992 void procmime_parse_multipart(MimeInfo *mimeinfo)
 993 {
 994         HeaderEntry hentry[] = {{"Content-Type:",  NULL, TRUE},
 995                                 {"Content-Transfer-Encoding:",
 996                                                    NULL, FALSE},
 997                                 {"Content-Description:",
 998                                                    NULL, TRUE},
 999                                 {"Content-ID:",
1000                                                    NULL, TRUE},
1001                                 {"Content-Disposition:",
1002                                                    NULL, TRUE},
1003                                 {NULL,             NULL, FALSE}};
1004         gchar *p;
1005         gchar *boundary;
1006         gint boundary_len = 0, lastoffset = -1, i;
1007         gchar buf[BUFFSIZE];
1008         FILE *fp;
1009
1010         boundary = g_hash_table_lookup(mimeinfo->parameters, "boundary");
1011         if (!boundary)
1012                 return;
1013         boundary_len = strlen(boundary);
1014
1015         if (mimeinfo->encoding_type != ENC_BINARY &&
1016             mimeinfo->encoding_type != ENC_7BIT &&
1017             mimeinfo->encoding_type != ENC_8BIT)
1018                 procmime_decode_content(mimeinfo);
1019
1020         fp = fopen(mimeinfo->filename, "rb");
1021         fseek(fp, mimeinfo->offset, SEEK_SET);
1022         while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
1023                 if (ftell(fp) > (mimeinfo->offset + mimeinfo->length))
1024                         break;
1025
1026                 if (IS_BOUNDARY(buf, boundary, boundary_len)) {
1027                         if (lastoffset != -1) {
1028                                 procmime_parse_mimepart(mimeinfo,
1029                                                         hentry[0].body, hentry[1].body,
1030                                                         hentry[2].body, hentry[3].body,
1031                                                         hentry[4].body,
1032                                                         mimeinfo->filename, lastoffset,
1033                                                         (ftell(fp) - strlen(buf)) - lastoffset);
1034                         }
1035
1036                         if (buf[2 + boundary_len]     == '-' &&
1037                             buf[2 + boundary_len + 1] == '-')
1038                                 break;
1039
1040                         for (i = 0; i < (sizeof hentry / sizeof hentry[0]) ; i++) {
1041                                 g_free(hentry[i].body);
1042                                 hentry[i].body = NULL;
1043                         }
1044                         procheader_get_header_fields(fp, hentry);
1045                         lastoffset = ftell(fp);
1046                 }
1047         }
1048         for (i = 0; i < (sizeof hentry / sizeof hentry[0]); i++) {
1049                 g_free(hentry[i].body);
1050                 hentry[i].body = NULL;
1051         }
1052         fclose(fp);
1053 }
1054
1055 static void add_to_mimeinfo_parameters(gchar **parts, MimeInfo *mimeinfo)
1056 {
1057         gchar **strarray;
1058
1059         for (strarray = parts; *strarray != NULL; strarray++) {
1060                 gchar **parameters_parts;
1061
1062                 parameters_parts = g_strsplit(*strarray, "=", 1);
1063                 if ((parameters_parts[0] != NULL) && (parameters_parts[1] != NULL)) {
1064                         gchar *firstspace;
1065
1066                         g_strstrip(parameters_parts[0]);
1067                         g_strstrip(parameters_parts[1]);
1068                         g_strdown(parameters_parts[0]);
1069                         if(parameters_parts[1][0] == '"')
1070                                 extract_quote(parameters_parts[1], '"');
1071                         else if ((firstspace = strchr(parameters_parts[1], ' ')) != NULL)
1072                                 *firstspace = '\0';
1073                         if(g_hash_table_lookup(mimeinfo->parameters,
1074                                                parameters_parts[0]) == NULL)
1075                                 g_hash_table_insert(mimeinfo->parameters,
1076                                                     g_strdup(parameters_parts[0]),
1077                                                     g_strdup(parameters_parts[1]));
1078                 }
1079                 g_strfreev(parameters_parts);
1080         }
1081 }
1082
1083 static void procmime_parse_content_type(const gchar *content_type, MimeInfo *mimeinfo)
1084 {
1085         gchar **content_type_parts;
1086         gchar **strarray;
1087         gchar *str;
1088         struct TypeTable *typetablearray;
1089
1090         g_return_if_fail(content_type != NULL);
1091         g_return_if_fail(mimeinfo != NULL);
1092
1093         /* Split content type into parts and remove trailing
1094            and leading whitespaces from all strings */
1095         content_type_parts = g_strsplit(content_type, ";", 0);
1096         for (strarray = content_type_parts; *strarray != NULL; strarray++) {
1097                 g_strstrip(*strarray);
1098         }
1099
1100         /* Get mimeinfo->type and mimeinfo->subtype */
1101         str = content_type_parts[0];
1102         /* RFC 2045, page 13 says that the mime subtype is MANDATORY;
1103          * if it's not available we use the default Content-Type */
1104         if ((str == NULL) || (str[0] == '\0') || (strchr(str, '/') == NULL)) {
1105                 mimeinfo->type = MIMETYPE_TEXT;
1106                 mimeinfo->subtype = g_strdup("plain");
1107                 if(g_hash_table_lookup(mimeinfo->parameters,
1108                                        "charset") == NULL)
1109                         g_hash_table_insert(mimeinfo->parameters,
1110                                             g_strdup("charset"),
1111                                             g_strdup("us-ascii"));
1112                 g_strfreev(content_type_parts);
1113                 return;
1114         } else {
1115                 mimeinfo->type = MIMETYPE_UNKNOWN;
1116                 for (typetablearray = mime_type_table; typetablearray->str != NULL; typetablearray++) {
1117                         if (g_strncasecmp(str, typetablearray->str, strlen(typetablearray->str)) == 0 &&
1118                             str[strlen(typetablearray->str)] == '/') {
1119                                 mimeinfo->type = typetablearray->type;
1120                                 mimeinfo->subtype = g_strdup(str + strlen(typetablearray->str) + 1);
1121                                 break;
1122                         }
1123                 }
1124
1125                 /* Get mimeinfo->parmeters */
1126                 add_to_mimeinfo_parameters(&content_type_parts[1], mimeinfo);
1127         }
1128
1129         g_strfreev(content_type_parts);
1130 }
1131
1132 static void procmime_parse_content_disposition(const gchar *content_disposition, MimeInfo *mimeinfo)
1133 {
1134         gchar **content_disp_parts;
1135         gchar **strarray;
1136         gchar *str;
1137
1138         g_return_if_fail(content_disposition != NULL);
1139         g_return_if_fail(mimeinfo != NULL);
1140
1141         /* Split into parts and remove trailing
1142            and leading whitespaces from all strings */
1143         content_disp_parts = g_strsplit(content_disposition, ";", 0);
1144         for (strarray = content_disp_parts; *strarray != NULL; strarray++) {
1145                 g_strstrip(*strarray);
1146         }
1147         /* Get mimeinfo->disposition */
1148         str = content_disp_parts[0];
1149         if (str == NULL) {
1150                 g_strfreev(content_disp_parts);
1151                 return;
1152         }
1153         if (!g_strcasecmp(str, "inline"))
1154                 mimeinfo->disposition = DISPOSITIONTYPE_INLINE;
1155         else if (!g_strcasecmp(str, "attachment"))
1156                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1157         else
1158                 mimeinfo->disposition = DISPOSITIONTYPE_ATTACHMENT;
1159
1160         add_to_mimeinfo_parameters(&content_disp_parts[1], mimeinfo);
1161         g_strfreev(content_disp_parts);
1162 }
1163
1164
1165 static void procmime_parse_content_encoding(const gchar *content_encoding, MimeInfo *mimeinfo)
1166 {
1167         struct EncodingTable *enc_table;
1168
1169         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1170                 if (g_strcasecmp(enc_table->str, content_encoding) == 0) {
1171                         mimeinfo->encoding_type = enc_table->enc_type;
1172                         return;
1173                 }
1174         }
1175         mimeinfo->encoding_type = ENC_UNKNOWN;
1176         return;
1177 }
1178
1179 void procmime_parse_mimepart(MimeInfo *parent,
1180                              gchar *content_type,
1181                              gchar *content_encoding,
1182                              gchar *content_description,
1183                              gchar *content_id,
1184                              gchar *content_disposition,
1185                              const gchar *filename,
1186                              guint offset,
1187                              guint length)
1188 {
1189         MimeInfo *mimeinfo;
1190
1191         /* Create MimeInfo */
1192         mimeinfo = procmime_mimeinfo_new();
1193         if (parent != NULL)
1194                 g_node_append(parent->node, mimeinfo->node);
1195         mimeinfo->filename = g_strdup(filename);
1196         mimeinfo->offset = offset;
1197         mimeinfo->length = length;
1198
1199         if (content_type != NULL) {
1200                 procmime_parse_content_type(content_type, mimeinfo);
1201         } else {
1202                 mimeinfo->type = MIMETYPE_TEXT;
1203                 mimeinfo->subtype = g_strdup("plain");
1204                 if(g_hash_table_lookup(mimeinfo->parameters,
1205                                        "charset") == NULL)
1206                         g_hash_table_insert(mimeinfo->parameters, g_strdup("charset"), g_strdup("us-ascii"));
1207         }
1208
1209         if (content_encoding != NULL) {
1210                 procmime_parse_content_encoding(content_encoding, mimeinfo);
1211         } else {
1212                 mimeinfo->encoding_type = ENC_7BIT;
1213         }
1214
1215         if (content_description != NULL)
1216                 mimeinfo->description = g_strdup(content_description);
1217         else
1218                 mimeinfo->description = NULL;
1219
1220         if (content_id != NULL)
1221                 mimeinfo->id = g_strdup(content_id);
1222         else
1223                 mimeinfo->id = NULL;
1224
1225         if (content_disposition != NULL)
1226                 procmime_parse_content_disposition(content_disposition, mimeinfo);
1227         else
1228                 mimeinfo->disposition = DISPOSITIONTYPE_UNKNOWN;
1229
1230         /* Call parser for mime type */
1231         switch (mimeinfo->type) {
1232                 case MIMETYPE_MESSAGE:
1233                         if (g_strcasecmp(mimeinfo->subtype, "rfc822") == 0) {
1234                                 procmime_parse_message_rfc822(mimeinfo);
1235                         }
1236                         break;
1237
1238                 case MIMETYPE_MULTIPART:
1239                         procmime_parse_multipart(mimeinfo);
1240                         break;
1241
1242                 default:
1243                         break;
1244         }
1245 }
1246
1247 static gchar *typenames[] = {
1248     "text",
1249     "image",
1250     "audio",
1251     "video",
1252     "application",
1253     "message",
1254     "multipart",
1255     "unknown",
1256 };
1257
1258 static gboolean output_func(GNode *node, gpointer data)
1259 {
1260         guint i, depth;
1261         MimeInfo *mimeinfo = (MimeInfo *) node->data;
1262
1263         depth = g_node_depth(node);
1264         for(i = 0; i < depth; i++)
1265                 printf("    ");
1266         printf("%s/%s (offset:%d length:%d encoding: %d)\n", typenames[mimeinfo->type], mimeinfo->subtype, mimeinfo->offset, mimeinfo->length, mimeinfo->encoding_type);
1267
1268         return FALSE;
1269 }
1270
1271 static void output_mime_structure(MimeInfo *mimeinfo, int indent)
1272 {
1273         g_node_traverse(mimeinfo->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1, output_func, NULL);
1274 }
1275
1276 static MimeInfo *procmime_scan_file_with_offset(const gchar *filename, int offset)
1277 {
1278         MimeInfo *mimeinfo;
1279         struct stat buf;
1280
1281         stat(filename, &buf);
1282
1283         mimeinfo = procmime_mimeinfo_new();
1284         mimeinfo->encoding_type = ENC_BINARY;
1285         mimeinfo->type = MIMETYPE_MESSAGE;
1286         mimeinfo->subtype = g_strdup("rfc822");
1287         mimeinfo->filename = g_strdup(filename);
1288         mimeinfo->offset = offset;
1289         mimeinfo->length = buf.st_size - offset;
1290
1291         procmime_parse_message_rfc822(mimeinfo);
1292         if (debug_get_mode())
1293                 output_mime_structure(mimeinfo, 0);
1294
1295         return mimeinfo;
1296 }
1297
1298 MimeInfo *procmime_scan_file(gchar *filename)
1299 {
1300         MimeInfo *mimeinfo;
1301
1302         g_return_val_if_fail(filename != NULL, NULL);
1303
1304         mimeinfo = procmime_scan_file_with_offset(filename, 0);
1305
1306         return mimeinfo;
1307 }
1308
1309 MimeInfo *procmime_scan_queue_file(gchar *filename)
1310 {
1311         FILE *fp;
1312         MimeInfo *mimeinfo;
1313         gchar buf[BUFFSIZE];
1314         gint offset = 0;
1315
1316         g_return_val_if_fail(filename != NULL, NULL);
1317
1318         /* Open file */
1319         if((fp = fopen(filename, "rb")) == NULL)
1320                 return NULL;
1321         /* Skip queue header */
1322         while (fgets(buf, sizeof(buf), fp) != NULL)
1323                 if (buf[0] == '\r' || buf[0] == '\n') break;
1324         offset = ftell(fp);
1325         fclose(fp);
1326
1327         mimeinfo = procmime_scan_file_with_offset(filename, offset);
1328
1329         return mimeinfo;
1330 }