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
  32 #include "intl.h"
  33 #include "procmime.h"
  34 #include "procheader.h"
  35 #include "base64.h"
  36 #include "quoted-printable.h"
  37 #include "uuencode.h"
  38 #include "unmime.h"
  39 #include "html.h"
  40 #include "enriched.h"
  41 #include "codeconv.h"
  42 #include "utils.h"
  43 #include "prefs_common.h"
  44
  45 #if USE_GPGME
  46 #  include "rfc2015.h"
  47 #endif
  48
  49 #include "prefs_gtk.h"
  50
  51 static GHashTable *procmime_get_mime_type_table (void);
  52
  53 MimeInfo *procmime_mimeinfo_new(void)
  54 {
  55         MimeInfo *mimeinfo;
  56
  57         mimeinfo = g_new0(MimeInfo, 1);
  58         mimeinfo->mime_type     = MIME_UNKNOWN;
  59         mimeinfo->encoding_type = ENC_UNKNOWN;
  60
  61         return mimeinfo;
  62 }
  63
  64 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  65 {
  66         while (mimeinfo != NULL) {
  67                 MimeInfo *next;
  68
  69                 g_free(mimeinfo->encoding);
  70                 g_free(mimeinfo->content_type);
  71                 g_free(mimeinfo->charset);
  72                 g_free(mimeinfo->name);
  73                 g_free(mimeinfo->boundary);
  74                 g_free(mimeinfo->content_disposition);
  75                 g_free(mimeinfo->filename);
  76 #if USE_GPGME
  77                 g_free(mimeinfo->plaintextfile);
  78                 g_free(mimeinfo->sigstatus);
  79                 g_free(mimeinfo->sigstatus_full);
  80 #endif
  81
  82                 procmime_mimeinfo_free_all(mimeinfo->sub);
  83                 procmime_mimeinfo_free_all(mimeinfo->children);
  84 #if USE_GPGME
  85                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
  86 #endif
  87
  88                 next = mimeinfo->next;
  89                 g_free(mimeinfo);
  90                 mimeinfo = next;
  91         }
  92 }
  93
  94 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
  95 {
  96         MimeInfo *child = parent->children;
  97
  98         if (!child)
  99                 parent->children = mimeinfo;
 100         else {
 101                 while (child->next != NULL)
 102                         child = child->next;
 103
 104                 child->next = mimeinfo;
 105         }
 106
 107         mimeinfo->parent = parent;
 108         mimeinfo->level = parent->level + 1;
 109
 110         return mimeinfo;
 111 }
 112
 113 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 114 {
 115         MimeInfo *parent = old->parent;
 116         MimeInfo *child;
 117
 118         g_return_if_fail(parent != NULL);
 119         g_return_if_fail(new->next == NULL);
 120
 121         for (child = parent->children; child && child != old;
 122              child = child->next)
 123                 ;
 124         if (!child) {
 125                 g_warning("oops: parent can't find it's own child");
 126                 return;
 127         }
 128         procmime_mimeinfo_free_all(old);
 129
 130         if (child == parent->children) {
 131                 new->next = parent->children->next;
 132                 parent->children = new;
 133         } else {
 134                 new->next = child->next;
 135                 child = new;
 136         }
 137 }
 138
 139 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 140 {
 141         if (!mimeinfo) return NULL;
 142
 143         if (mimeinfo->children)
 144                 return mimeinfo->children;
 145         if (mimeinfo->sub)
 146                 return mimeinfo->sub;
 147         if (mimeinfo->next)
 148                 return mimeinfo->next;
 149
 150         if (mimeinfo->main) {
 151                 mimeinfo = mimeinfo->main;
 152                 if (mimeinfo->next)
 153                         return mimeinfo->next;
 154         }
 155
 156         for (mimeinfo = mimeinfo->parent; mimeinfo != NULL;
 157              mimeinfo = mimeinfo->parent) {
 158                 if (mimeinfo->next)
 159                         return mimeinfo->next;
 160                 if (mimeinfo->main) {
 161                         mimeinfo = mimeinfo->main;
 162                         if (mimeinfo->next)
 163                                 return mimeinfo->next;
 164                 }
 165         }
 166
 167         return NULL;
 168 }
 169
 170 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 171 {
 172         FILE *fp;
 173         MimeInfo *mimeinfo;
 174
 175         g_return_val_if_fail(msginfo != NULL, NULL);
 176
 177         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 178         mimeinfo = procmime_scan_mime_header(fp);
 179
 180         if (mimeinfo) {
 181                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 182                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 183                                 perror("fseek");
 184                 }
 185                 if (mimeinfo->mime_type != MIME_TEXT)
 186                         procmime_scan_multipart_message(mimeinfo, fp);
 187         }
 188
 189 #if USE_GPGME
 190         if (prefs_common.auto_check_signatures)
 191                 rfc2015_check_signature(mimeinfo, fp);
 192 #endif
 193         fclose(fp);
 194
 195         return mimeinfo;
 196 }
 197
 198 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 199 {
 200         gchar *p;
 201         gchar *boundary;
 202         gint boundary_len = 0;
 203         gchar buf[BUFFSIZE];
 204         glong fpos, prev_fpos;
 205         gint npart;
 206
 207         g_return_if_fail(mimeinfo != NULL);
 208         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 209
 210         if (mimeinfo->mime_type == MIME_MULTIPART) {
 211                 g_return_if_fail(mimeinfo->boundary != NULL);
 212                 g_return_if_fail(mimeinfo->sub == NULL);
 213         }
 214         g_return_if_fail(fp != NULL);
 215
 216         boundary = mimeinfo->boundary;
 217
 218         if (boundary) {
 219                 boundary_len = strlen(boundary);
 220
 221                 /* look for first boundary */
 222                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 223                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 224                 if (!p) return;
 225         }
 226
 227         if ((fpos = ftell(fp)) < 0) {
 228                 perror("ftell");
 229                 return;
 230         }
 231
 232         for (npart = 0;; npart++) {
 233                 MimeInfo *partinfo;
 234                 gboolean eom = FALSE;
 235
 236                 prev_fpos = fpos;
 237                 debug_print("prev_fpos: %ld\n", fpos);
 238
 239                 partinfo = procmime_scan_mime_header(fp);
 240                 if (!partinfo) break;
 241                 procmime_mimeinfo_insert(mimeinfo, partinfo);
 242
 243                 if (partinfo->mime_type == MIME_MULTIPART) {
 244                         if (partinfo->level < 8)
 245                                 procmime_scan_multipart_message(partinfo, fp);
 246                 } else if (partinfo->mime_type == MIME_MESSAGE_RFC822) {
 247                         MimeInfo *sub;
 248
 249                         partinfo->sub = sub = procmime_scan_mime_header(fp);
 250                         if (!sub) break;
 251
 252                         sub->level = partinfo->level + 1;
 253                         sub->parent = partinfo;
 254                         sub->main = partinfo;
 255
 256                         if (sub->level < 8) {
 257                                 if (sub->mime_type == MIME_MULTIPART) {
 258                                         procmime_scan_multipart_message
 259                                                 (sub, fp);
 260                                 } else if (sub->mime_type == MIME_MESSAGE_RFC822) {
 261                                         fseek(fp, sub->fpos, SEEK_SET);
 262                                         procmime_scan_multipart_message
 263                                                 (sub, fp);
 264                                 }
 265                         }
 266                 }
 267
 268                 /* look for next boundary */
 269                 buf[0] = '\0';
 270                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 271                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 272                                 if (buf[2 + boundary_len]     == '-' &&
 273                                     buf[2 + boundary_len + 1] == '-')
 274                                         eom = TRUE;
 275                                 break;
 276                         }
 277                 }
 278                 if (p == NULL) {
 279                         /* broken MIME, or single part MIME message */
 280                         buf[0] = '\0';
 281                         eom = TRUE;
 282                 }
 283                 fpos = ftell(fp);
 284                 debug_print("fpos: %ld\n", fpos);
 285
 286                 partinfo->size = fpos - prev_fpos - strlen(buf);
 287                 debug_print("partinfo->size: %d\n", partinfo->size);
 288                 if (partinfo->sub && !partinfo->sub->sub &&
 289                     !partinfo->sub->children) {
 290                         partinfo->sub->size = fpos - partinfo->sub->fpos - strlen(buf);
 291                         debug_print("partinfo->sub->size: %d\n",
 292                                     partinfo->sub->size);
 293                 }
 294                 debug_print("boundary: %s\n", buf);
 295
 296                 if (eom) break;
 297         }
 298 }
 299
 300 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 301 {
 302         gchar *buf;
 303
 304         Xstrdup_a(buf, encoding, return);
 305
 306         g_free(mimeinfo->encoding);
 307
 308         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 309         if (!strcasecmp(buf, "7bit"))
 310                 mimeinfo->encoding_type = ENC_7BIT;
 311         else if (!strcasecmp(buf, "8bit"))
 312                 mimeinfo->encoding_type = ENC_8BIT;
 313         else if (!strcasecmp(buf, "quoted-printable"))
 314                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 315         else if (!strcasecmp(buf, "base64"))
 316                 mimeinfo->encoding_type = ENC_BASE64;
 317         else if (!strcasecmp(buf, "x-uuencode"))
 318                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 319         else
 320                 mimeinfo->encoding_type = ENC_UNKNOWN;
 321
 322 }
 323
 324 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 325 {
 326         gchar *delim, *p, *cnttype;
 327         gchar *buf;
 328
 329         if (conv_get_current_charset() == C_EUC_JP &&
 330             strchr(content_type, '\033')) {
 331                 gint len;
 332                 len = strlen(content_type) * 2 + 1;
 333                 Xalloca(buf, len, return);
 334                 conv_jistoeuc(buf, len, content_type);
 335         } else
 336                 Xstrdup_a(buf, content_type, return);
 337
 338         g_free(mimeinfo->content_type);
 339         g_free(mimeinfo->charset);
 340         /* g_free(mimeinfo->name); */
 341         mimeinfo->content_type = NULL;
 342         mimeinfo->charset      = NULL;
 343         /* mimeinfo->name      = NULL; */
 344
 345         if ((delim = strchr(buf, ';'))) *delim = '\0';
 346         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 347
 348         mimeinfo->mime_type = procmime_scan_mime_type(cnttype);
 349
 350         if (!delim) return;
 351         p = delim + 1;
 352
 353         for (;;) {
 354                 gchar *eq;
 355                 gchar *attr, *value;
 356
 357                 if ((delim = strchr(p, ';'))) *delim = '\0';
 358
 359                 if (!(eq = strchr(p, '='))) break;
 360
 361                 *eq = '\0';
 362                 attr = p;
 363                 g_strstrip(attr);
 364                 value = eq + 1;
 365                 g_strstrip(value);
 366
 367                 if (*value == '"')
 368                         extract_quote(value, '"');
 369                 else {
 370                         eliminate_parenthesis(value, '(', ')');
 371                         g_strstrip(value);
 372                 }
 373
 374                 if (*value) {
 375                         if (!strcasecmp(attr, "charset"))
 376                                 mimeinfo->charset = g_strdup(value);
 377                         else if (!strcasecmp(attr, "name")) {
 378                                 gchar *tmp;
 379                                 size_t len;
 380
 381                                 len = strlen(value) + 1;
 382                                 Xalloca(tmp, len, return);
 383                                 conv_unmime_header(tmp, len, value, NULL);
 384                                 g_free(mimeinfo->name);
 385                                 /*pgp signatures should NOT have a name */
 386                                 if (mimeinfo->content_type
 387                                 &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 388                                         mimeinfo->name = g_strdup(tmp);
 389                         } else if (!strcasecmp(attr, "boundary"))
 390                                 mimeinfo->boundary = g_strdup(value);
 391                 }
 392
 393                 if (!delim) break;
 394                 p = delim + 1;
 395         }
 396
 397         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 398                 mimeinfo->mime_type = MIME_TEXT;
 399 }
 400
 401 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 402                                        const gchar *content_disposition)
 403 {
 404         gchar *delim, *p, *dispos;
 405         gchar *buf;
 406
 407         if (conv_get_current_charset() == C_EUC_JP &&
 408             strchr(content_disposition, '\033')) {
 409                 gint len;
 410                 len = strlen(content_disposition) * 2 + 1;
 411                 Xalloca(buf, len, return);
 412                 conv_jistoeuc(buf, len, content_disposition);
 413         } else
 414                 Xstrdup_a(buf, content_disposition, return);
 415
 416         if ((delim = strchr(buf, ';'))) *delim = '\0';
 417         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 418
 419         if (!delim) return;
 420         p = delim + 1;
 421
 422         for (;;) {
 423                 gchar *eq;
 424                 gchar *attr, *value;
 425
 426                 if ((delim = strchr(p, ';'))) *delim = '\0';
 427
 428                 if (!(eq = strchr(p, '='))) break;
 429
 430                 *eq = '\0';
 431                 attr = p;
 432                 g_strstrip(attr);
 433                 value = eq + 1;
 434                 g_strstrip(value);
 435
 436                 if (*value == '"')
 437                         extract_quote(value, '"');
 438                 else {
 439                         eliminate_parenthesis(value, '(', ')');
 440                         g_strstrip(value);
 441                 }
 442
 443                 if (*value) {
 444                         if (!strcasecmp(attr, "filename")) {
 445                                 gchar *tmp;
 446                                 size_t len;
 447
 448                                 len = strlen(value) + 1;
 449                                 Xalloca(tmp, len, return);
 450                                 conv_unmime_header(tmp, len, value, NULL);
 451                                 g_free(mimeinfo->filename);
 452                                 /*pgp signatures should NOT have a name */
 453                                 if (mimeinfo->content_type
 454                                 &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 455                                         mimeinfo->filename = g_strdup(tmp);
 456                                 break;
 457                         }
 458                 }
 459
 460                 if (!delim) break;
 461                 p = delim + 1;
 462         }
 463 }
 464
 465 void procmime_scan_content_description(MimeInfo *mimeinfo,
 466                                        const gchar *content_description)
 467 {
 468         gchar *buf;
 469
 470         gchar *tmp;
 471         size_t blen;
 472
 473         if (conv_get_current_charset() == C_EUC_JP &&
 474             strchr(content_description, '\033')) {
 475                 gint len;
 476                 len = strlen(content_description) * 2 + 1;
 477                 Xalloca(buf, len, return);
 478                 conv_jistoeuc(buf, len, content_description);
 479         } else
 480                 Xstrdup_a(buf, content_description, return);
 481
 482         blen = strlen(buf) + 1;
 483         Xalloca(tmp, blen, return);
 484         conv_unmime_header(tmp, blen, buf, NULL);
 485         /*pgp signatures should NOT have a name */
 486         if (mimeinfo->content_type
 487         &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 488                 mimeinfo->description = g_strdup(tmp);
 489 }
 490
 491 void procmime_scan_subject(MimeInfo *mimeinfo,
 492                            const gchar *subject)
 493 {
 494         gchar *buf;
 495
 496         gchar *tmp;
 497         size_t blen;
 498
 499         if (conv_get_current_charset() == C_EUC_JP &&
 500             strchr(subject, '\033')) {
 501                 gint len;
 502                 len = strlen(subject) * 2 + 1;
 503                 Xalloca(buf, len, return);
 504                 conv_jistoeuc(buf, len, subject);
 505         } else
 506                 Xstrdup_a(buf, subject, return);
 507
 508         blen = strlen(buf) + 1;
 509         Xalloca(tmp, blen, return);
 510         conv_unmime_header(tmp, blen, buf, NULL);
 511         g_free(mimeinfo->name);
 512         mimeinfo->name = g_strdup(tmp);
 513 }
 514
 515 enum
 516 {
 517         H_CONTENT_TRANSFER_ENCODING = 0,
 518         H_CONTENT_TYPE              = 1,
 519         H_CONTENT_DISPOSITION       = 2,
 520         H_CONTENT_DESCRIPTION       = 3,
 521         H_SUBJECT                   = 4
 522 };
 523
 524 MimeInfo *procmime_scan_mime_header(FILE *fp)
 525 {
 526         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 527                                                           NULL, FALSE},
 528                                        {"Content-Type:", NULL, TRUE},
 529                                        {"Content-Disposition:",
 530                                                           NULL, TRUE},
 531                                        {"Content-description:",
 532                                                           NULL, TRUE},
 533                                        {"Subject:",
 534                                                           NULL, TRUE},
 535                                        {NULL,             NULL, FALSE}};
 536         gchar buf[BUFFSIZE];
 537         gint hnum;
 538         HeaderEntry *hp;
 539         MimeInfo *mimeinfo;
 540
 541         g_return_val_if_fail(fp != NULL, NULL);
 542
 543         mimeinfo = procmime_mimeinfo_new();
 544         mimeinfo->mime_type = MIME_TEXT;
 545         mimeinfo->encoding_type = ENC_7BIT;
 546         mimeinfo->fpos = ftell(fp);
 547
 548         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 549                != -1) {
 550                 hp = hentry + hnum;
 551
 552                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 553                         procmime_scan_encoding
 554                                 (mimeinfo, buf + strlen(hp->name));
 555                 } else if (H_CONTENT_TYPE == hnum) {
 556                         procmime_scan_content_type
 557                                 (mimeinfo, buf + strlen(hp->name));
 558                 } else if (H_CONTENT_DISPOSITION == hnum) {
 559                         procmime_scan_content_disposition
 560                                 (mimeinfo, buf + strlen(hp->name));
 561                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 562                         procmime_scan_content_description
 563                                 (mimeinfo, buf + strlen(hp->name));
 564                 } else if (H_SUBJECT == hnum) {
 565                         procmime_scan_subject
 566                                 (mimeinfo, buf + strlen(hp->name));
 567                 }
 568         }
 569
 570         if (mimeinfo->mime_type == MIME_APPLICATION_OCTET_STREAM &&
 571             mimeinfo->name) {
 572                 const gchar *type;
 573                 type = procmime_get_mime_type(mimeinfo->name);
 574                 if (type)
 575                         mimeinfo->mime_type = procmime_scan_mime_type(type);
 576         }
 577
 578         if (!mimeinfo->content_type)
 579                         mimeinfo->content_type = g_strdup("text/plain");
 580
 581         return mimeinfo;
 582 }
 583
 584 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 585 {
 586         gchar buf[BUFFSIZE];
 587         gchar *boundary = NULL;
 588         gint boundary_len = 0;
 589         gboolean tmp_file = FALSE;
 590
 591         g_return_val_if_fail(infp != NULL, NULL);
 592         g_return_val_if_fail(mimeinfo != NULL, NULL);
 593
 594         if (!outfp) {
 595                 outfp = my_tmpfile();
 596                 if (!outfp) {
 597                         perror("tmpfile");
 598                         return NULL;
 599                 }
 600                 tmp_file = TRUE;
 601         }
 602
 603         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 604                 boundary = mimeinfo->parent->boundary;
 605                 boundary_len = strlen(boundary);
 606         }
 607
 608         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 609                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 610                        (!boundary ||
 611                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 612                         gint len;
 613                         len = qp_decode_line(buf);
 614                         fwrite(buf, len, 1, outfp);
 615                 }
 616         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 617                 gchar outbuf[BUFFSIZE];
 618                 gint len;
 619                 Base64Decoder *decoder;
 620
 621                 decoder = base64_decoder_new();
 622                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 623                        (!boundary ||
 624                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 625                         len = base64_decoder_decode(decoder, buf, outbuf);
 626                         if (len < 0) {
 627                                 g_warning("Bad BASE64 content\n");
 628                                 break;
 629                         }
 630                         fwrite(outbuf, sizeof(gchar), len, outfp);
 631                 }
 632                 base64_decoder_free(decoder);
 633         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 634                 gchar outbuf[BUFFSIZE];
 635                 gint len;
 636                 gboolean flag = FALSE;
 637
 638                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 639                        (!boundary ||
 640                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 641                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 642
 643                         if (flag) {
 644                                 len = fromuutobits(outbuf, buf);
 645                                 if (len <= 0) {
 646                                         if (len < 0)
 647                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 648                                         break;
 649                                 }
 650                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 651                         } else
 652                                 flag = TRUE;
 653                 }
 654         } else {
 655                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 656                        (!boundary ||
 657                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 658                         fputs(buf, outfp);
 659                 }
 660         }
 661
 662         if (tmp_file) rewind(outfp);
 663         return outfp;
 664 }
 665
 666 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 667                        MimeInfo *mimeinfo)
 668 {
 669         FILE *infp, *outfp;
 670         gchar buf[BUFFSIZE];
 671
 672         g_return_val_if_fail(outfile != NULL, -1);
 673         g_return_val_if_fail(infile != NULL, -1);
 674         g_return_val_if_fail(mimeinfo != NULL, -1);
 675
 676         if ((infp = fopen(infile, "rb")) == NULL) {
 677                 FILE_OP_ERROR(infile, "fopen");
 678                 return -1;
 679         }
 680         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 681                 FILE_OP_ERROR(infile, "fseek");
 682                 fclose(infp);
 683                 return -1;
 684         }
 685         if ((outfp = fopen(outfile, "wb")) == NULL) {
 686                 FILE_OP_ERROR(outfile, "fopen");
 687                 fclose(infp);
 688                 return -1;
 689         }
 690
 691         while (fgets(buf, sizeof(buf), infp) != NULL)
 692                 if (buf[0] == '\r' || buf[0] == '\n') break;
 693
 694         procmime_decode_content(outfp, infp, mimeinfo);
 695
 696         fclose(infp);
 697         if (fclose(outfp) == EOF) {
 698                 FILE_OP_ERROR(outfile, "fclose");
 699                 unlink(outfile);
 700                 return -1;
 701         }
 702
 703         return 0;
 704 }
 705
 706 struct ContentRenderer {
 707         char * content_type;
 708         char * renderer;
 709 };
 710
 711 static GList * renderer_list = NULL;
 712
 713 static struct ContentRenderer *
 714 content_renderer_new(char * content_type, char * renderer)
 715 {
 716         struct ContentRenderer * cr;
 717
 718         cr = g_new(struct ContentRenderer, 1);
 719         if (cr == NULL)
 720                 return NULL;
 721
 722         cr->content_type = g_strdup(content_type);
 723         cr->renderer = g_strdup(renderer);
 724
 725         return cr;
 726 }
 727
 728 static void content_renderer_free(struct ContentRenderer * cr)
 729 {
 730         g_free(cr->content_type);
 731         g_free(cr->renderer);
 732         g_free(cr);
 733 }
 734
 735 void renderer_read_config(void)
 736 {
 737         gchar buf[BUFFSIZE];
 738         FILE * f;
 739         gchar * rcpath;
 740
 741         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 742         renderer_list = NULL;
 743
 744         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 745         f = fopen(rcpath, "rb");
 746         g_free(rcpath);
 747
 748         if (f == NULL)
 749                 return;
 750
 751         while (fgets(buf, BUFFSIZE, f)) {
 752                 char * p;
 753                 struct ContentRenderer * cr;
 754
 755                 strretchomp(buf);
 756                 p = strchr(buf, ' ');
 757                 if (p == NULL)
 758                         continue;
 759                 * p = 0;
 760
 761                 cr = content_renderer_new(buf, p + 1);
 762                 if (cr == NULL)
 763                         continue;
 764
 765                 renderer_list = g_list_append(renderer_list, cr);
 766         }
 767
 768         fclose(f);
 769 }
 770
 771 void renderer_write_config(void)
 772 {
 773         gchar * rcpath;
 774         PrefFile *pfile;
 775         GList * cur;
 776
 777         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 778
 779         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 780                 g_warning("failed to write configuration to file\n");
 781                 g_free(rcpath);
 782                 return;
 783         }
 784
 785         g_free(rcpath);
 786
 787         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 788                 struct ContentRenderer * renderer;
 789                 renderer = cur->data;
 790                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 791                         renderer->renderer);
 792         }
 793
 794         if (prefs_file_close(pfile) < 0) {
 795                 g_warning("failed to write configuration to file\n");
 796                 return;
 797         }
 798 }
 799
 800 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 801 {
 802         FILE *tmpfp, *outfp;
 803         gchar *src_codeset;
 804         gboolean conv_fail = FALSE;
 805         gchar buf[BUFFSIZE];
 806         gchar *str;
 807         struct ContentRenderer * renderer;
 808         GList * cur;
 809
 810         g_return_val_if_fail(mimeinfo != NULL, NULL);
 811         g_return_val_if_fail(infp != NULL, NULL);
 812         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 813                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 814                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 815
 816         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 817                 perror("fseek");
 818                 return NULL;
 819         }
 820
 821         while (fgets(buf, sizeof(buf), infp) != NULL)
 822                 if (buf[0] == '\r' || buf[0] == '\n') break;
 823
 824         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 825         if (!tmpfp)
 826                 return NULL;
 827
 828         if ((outfp = my_tmpfile()) == NULL) {
 829                 perror("tmpfile");
 830                 fclose(tmpfp);
 831                 return NULL;
 832         }
 833
 834         src_codeset = prefs_common.force_charset
 835                 ? prefs_common.force_charset : mimeinfo->charset;
 836
 837         renderer = NULL;
 838
 839         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 840                 struct ContentRenderer * cr;
 841                 cr = cur->data;
 842                 if (g_strcasecmp(cr->content_type,
 843                                  mimeinfo->content_type) == 0) {
 844                         renderer = cr;
 845                         break;
 846                 }
 847         }
 848
 849         if (renderer != NULL) {
 850                 FILE * p;
 851                 int oldout;
 852
 853                 oldout = dup(1);
 854
 855                 dup2(fileno(outfp), 1);
 856
 857                 p = popen(renderer->renderer, "w");
 858                 if (p != NULL) {
 859                         size_t count;
 860
 861                         while ((count =
 862                                 fread(buf, sizeof(char), sizeof(buf),
 863                                       tmpfp)) > 0)
 864                                 fwrite(buf, sizeof(char), count, p);
 865                         pclose(p);
 866                 }
 867
 868                 dup2(oldout, 1);
 869         } else if (mimeinfo->mime_type == MIME_TEXT) {
 870                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 871                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 872                         if (str) {
 873                                 fputs(str, outfp);
 874                                 g_free(str);
 875                         } else {
 876                                 conv_fail = TRUE;
 877                                 fputs(buf, outfp);
 878                         }
 879                 }
 880         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 881                 HTMLParser *parser;
 882                 CodeConverter *conv;
 883
 884                 conv = conv_code_converter_new(src_codeset);
 885                 parser = html_parser_new(tmpfp, conv);
 886                 while ((str = html_parse(parser)) != NULL) {
 887                         fputs(str, outfp);
 888                 }
 889                 html_parser_destroy(parser);
 890                 conv_code_converter_destroy(conv);
 891         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 892                 ERTFParser *parser;
 893                 CodeConverter *conv;
 894
 895                 conv = conv_code_converter_new(src_codeset);
 896                 parser = ertf_parser_new(tmpfp, conv);
 897                 while ((str = ertf_parse(parser)) != NULL) {
 898                         fputs(str, outfp);
 899                 }
 900                 ertf_parser_destroy(parser);
 901                 conv_code_converter_destroy(conv);
 902         }
 903
 904         if (conv_fail)
 905                 g_warning("procmime_get_text_content(): Code conversion failed.\n");
 906
 907         fclose(tmpfp);
 908         rewind(outfp);
 909
 910         return outfp;
 911 }
 912
 913 /* search the first text part of (multipart) MIME message,
 914    decode, convert it and output to outfp. */
 915 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 916 {
 917         FILE *infp, *outfp = NULL;
 918         MimeInfo *mimeinfo, *partinfo;
 919
 920         g_return_val_if_fail(msginfo != NULL, NULL);
 921
 922         mimeinfo = procmime_scan_message(msginfo);
 923         if (!mimeinfo) return NULL;
 924
 925         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 926                 procmime_mimeinfo_free_all(mimeinfo);
 927                 return NULL;
 928         }
 929
 930         partinfo = mimeinfo;
 931         while (partinfo && partinfo->mime_type != MIME_TEXT)
 932                 partinfo = procmime_mimeinfo_next(partinfo);
 933         if (!partinfo) {
 934                 partinfo = mimeinfo;
 935                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 936                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 937                         partinfo = procmime_mimeinfo_next(partinfo);
 938         }
 939
 940
 941         if (partinfo)
 942                 outfp = procmime_get_text_content(partinfo, infp);
 943
 944         fclose(infp);
 945         procmime_mimeinfo_free_all(mimeinfo);
 946
 947         return outfp;
 948 }
 949
 950 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 951                                    const gchar *str, gboolean case_sens)
 952 {
 953
 954         FILE *infp, *outfp;
 955         gchar buf[BUFFSIZE];
 956         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 957
 958         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 959         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 960                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 961                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 962         g_return_val_if_fail(str != NULL, FALSE);
 963
 964         if ((infp = fopen(filename, "rb")) == NULL) {
 965                 FILE_OP_ERROR(filename, "fopen");
 966                 return FALSE;
 967         }
 968
 969         outfp = procmime_get_text_content(mimeinfo, infp);
 970         fclose(infp);
 971
 972         if (!outfp)
 973                 return FALSE;
 974
 975         if (case_sens)
 976                 StrFindFunc = strstr;
 977         else
 978                 StrFindFunc = strcasestr;
 979
 980         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 981                 if (StrFindFunc(buf, str) != NULL) {
 982                         fclose(outfp);
 983                         return TRUE;
 984                 }
 985         }
 986
 987         fclose(outfp);
 988
 989         return FALSE;
 990 }
 991
 992 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
 993                               gboolean case_sens)
 994 {
 995         MimeInfo *mimeinfo;
 996         MimeInfo *partinfo;
 997         gchar *filename;
 998         gboolean found = FALSE;
 999
1000         g_return_val_if_fail(msginfo != NULL, FALSE);
1001         g_return_val_if_fail(str != NULL, FALSE);
1002
1003         filename = procmsg_get_message_file(msginfo);
1004         if (!filename) return FALSE;
1005         mimeinfo = procmime_scan_message(msginfo);
1006
1007         for (partinfo = mimeinfo; partinfo != NULL;
1008              partinfo = procmime_mimeinfo_next(partinfo)) {
1009                 if (partinfo->mime_type == MIME_TEXT ||
1010                     partinfo->mime_type == MIME_TEXT_HTML ||
1011                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1012                         if (procmime_find_string_part
1013                                 (partinfo, filename, str, case_sens) == TRUE) {
1014                                 found = TRUE;
1015                                 break;
1016                         }
1017                 }
1018         }
1019
1020         procmime_mimeinfo_free_all(mimeinfo);
1021         g_free(filename);
1022
1023         return found;
1024 }
1025
1026 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1027 {
1028         static guint32 id = 0;
1029         gchar *base;
1030         gchar *filename;
1031         gchar f_prefix[10];
1032
1033         g_return_val_if_fail(mimeinfo != NULL, NULL);
1034
1035         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1036
1037         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1038                 base = "mimetmp.html";
1039         else {
1040                 base = mimeinfo->filename ? mimeinfo->filename
1041                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1042                 base = g_basename(base);
1043                 if (*base == '\0') base = "mimetmp";
1044                 Xstrdup_a(base, base, return NULL);
1045                 subst_for_filename(base);
1046         }
1047
1048         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1049                                f_prefix, base, NULL);
1050
1051         return filename;
1052 }
1053
1054 ContentType procmime_scan_mime_type(const gchar *mime_type)
1055 {
1056         ContentType type;
1057
1058         if (!strncasecmp(mime_type, "text/html", 9))
1059                 type = MIME_TEXT_HTML;
1060         else if (!strncasecmp(mime_type, "text/enriched", 13))
1061                 type = MIME_TEXT_ENRICHED;
1062         else if (!strncasecmp(mime_type, "text/", 5))
1063                 type = MIME_TEXT;
1064         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1065                 type = MIME_MESSAGE_RFC822;
1066         else if (!strncasecmp(mime_type, "message/", 8))
1067                 type = MIME_TEXT;
1068         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1069                 type = MIME_APPLICATION_OCTET_STREAM;
1070         else if (!strncasecmp(mime_type, "application/", 12))
1071                 type = MIME_APPLICATION;
1072         else if (!strncasecmp(mime_type, "multipart/", 10))
1073                 type = MIME_MULTIPART;
1074         else if (!strncasecmp(mime_type, "image/", 6))
1075                 type = MIME_IMAGE;
1076         else if (!strncasecmp(mime_type, "audio/", 6))
1077                 type = MIME_AUDIO;
1078         else if (!strcasecmp(mime_type, "text"))
1079                 type = MIME_TEXT;
1080         else
1081                 type = MIME_UNKNOWN;
1082
1083         return type;
1084 }
1085
1086 static GList *mime_type_list = NULL;
1087
1088 gchar *procmime_get_mime_type(const gchar *filename)
1089 {
1090         static GHashTable *mime_type_table = NULL;
1091         MimeType *mime_type;
1092         const gchar *p;
1093         gchar *ext;
1094
1095         if (!mime_type_table) {
1096                 mime_type_table = procmime_get_mime_type_table();
1097                 if (!mime_type_table) return NULL;
1098         }
1099
1100         filename = g_basename(filename);
1101         p = strrchr(filename, '.');
1102         if (!p) return NULL;
1103
1104         Xstrdup_a(ext, p + 1, return NULL);
1105         g_strdown(ext);
1106         mime_type = g_hash_table_lookup(mime_type_table, ext);
1107         if (mime_type) {
1108                 gchar *str;
1109
1110                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1111                                   NULL);
1112                 return str;
1113         }
1114
1115         return NULL;
1116 }
1117
1118 static guint procmime_str_hash(gconstpointer gptr)
1119 {
1120         guint hash_result = 0;
1121         const char *str;
1122
1123         for (str = gptr; str && *str; str++) {
1124                 if (isupper(*str)) hash_result += (*str + ' ');
1125                 else hash_result += *str;
1126         }
1127
1128         return hash_result;
1129 }
1130
1131 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1132 {
1133         const char *str1 = gptr1;
1134         const char *str2 = gptr2;
1135
1136         return !strcasecmp(str1, str2);
1137 }
1138
1139 static GHashTable *procmime_get_mime_type_table(void)
1140 {
1141         GHashTable *table = NULL;
1142         GList *cur;
1143         MimeType *mime_type;
1144         gchar **exts;
1145
1146         if (!mime_type_list) {
1147                 mime_type_list = procmime_get_mime_type_list();
1148                 if (!mime_type_list) return NULL;
1149         }
1150
1151         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1152
1153         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1154                 gint i;
1155                 gchar *key;
1156
1157                 mime_type = (MimeType *)cur->data;
1158
1159                 if (!mime_type->extension) continue;
1160
1161                 exts = g_strsplit(mime_type->extension, " ", 16);
1162                 for (i = 0; exts[i] != NULL; i++) {
1163                         /* make the key case insensitive */
1164                         g_strdown(exts[i]);
1165                         /* use previously dup'd key on overwriting */
1166                         if (g_hash_table_lookup(table, exts[i]))
1167                                 key = exts[i];
1168                         else
1169                                 key = g_strdup(exts[i]);
1170                         g_hash_table_insert(table, key, mime_type);
1171                 }
1172                 g_strfreev(exts);
1173         }
1174
1175         return table;
1176 }
1177
1178 GList *procmime_get_mime_type_list(void)
1179 {
1180         GList *list = NULL;
1181         FILE *fp;
1182         gchar buf[BUFFSIZE];
1183         gchar *p, *delim;
1184         MimeType *mime_type;
1185
1186         if (mime_type_list)
1187                 return mime_type_list;
1188
1189         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
1190                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
1191                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1192                         return NULL;
1193                 }
1194         }
1195
1196         while (fgets(buf, sizeof(buf), fp) != NULL) {
1197                 p = strchr(buf, '#');
1198                 if (p) *p = '\0';
1199                 g_strstrip(buf);
1200
1201                 p = buf;
1202                 while (*p && !isspace(*p)) p++;
1203                 if (*p) {
1204                         *p = '\0';
1205                         p++;
1206                 }
1207                 delim = strchr(buf, '/');
1208                 if (delim == NULL) continue;
1209                 *delim = '\0';
1210
1211                 mime_type = g_new(MimeType, 1);
1212                 mime_type->type = g_strdup(buf);
1213                 mime_type->sub_type = g_strdup(delim + 1);
1214
1215                 while (*p && isspace(*p)) p++;
1216                 if (*p)
1217                         mime_type->extension = g_strdup(p);
1218                 else
1219                         mime_type->extension = NULL;
1220
1221                 list = g_list_append(list, mime_type);
1222         }
1223
1224         fclose(fp);
1225
1226         if (!list)
1227                 g_warning("Can't read mime.types\n");
1228
1229         return list;
1230 }
1231
1232 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1233 {
1234         if (!charset)
1235                 return ENC_8BIT;
1236         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1237                  !strcasecmp(charset, "US-ASCII"))
1238                 return ENC_7BIT;
1239         else if (!strcasecmp(charset, "ISO-8859-5") ||
1240                  !strncasecmp(charset, "KOI8-", 5) ||
1241                  !strcasecmp(charset, "Windows-1251"))
1242                 return ENC_8BIT;
1243         else if (!strncasecmp(charset, "ISO-8859-", 9))
1244                 return ENC_QUOTED_PRINTABLE;
1245         else
1246                 return ENC_8BIT;
1247 }
1248
1249 EncodingType procmime_get_encoding_for_file(const gchar *file)
1250 {
1251         FILE *fp;
1252         guchar buf[BUFSIZ];
1253         size_t len;
1254
1255         if ((fp = fopen(file, "rb")) == NULL) {
1256                 FILE_OP_ERROR(file, "fopen");
1257                 return ENC_UNKNOWN;
1258         }
1259
1260         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
1261                 guchar *p;
1262                 gint i;
1263
1264                 for (p = buf, i = 0; i < len; p++, i++) {
1265                         if (*p & 0x80) {
1266                                 fclose(fp);
1267                                 return ENC_BASE64;
1268                         }
1269                 }
1270         }
1271
1272         fclose(fp);
1273         return ENC_7BIT;
1274 }
1275
1276 struct EncodingTable
1277 {
1278         gchar *str;
1279         EncodingType enc_type;
1280 };
1281
1282 struct EncodingTable encoding_table[] = {
1283         {"7bit", ENC_7BIT},
1284         {"8bit", ENC_8BIT},
1285         {"binary", ENC_BINARY},
1286         {"quoted-printable", ENC_QUOTED_PRINTABLE},
1287         {"base64", ENC_BASE64},
1288         {"x-uuencode", ENC_UNKNOWN},
1289         {NULL, ENC_UNKNOWN},
1290 };
1291
1292 const gchar *procmime_get_encoding_str(EncodingType encoding)
1293 {
1294         struct EncodingTable *enc_table;
1295
1296         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1297                 if (enc_table->enc_type == encoding)
1298                         return enc_table->str;
1299         }
1300         return NULL;
1301 }