src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 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 "uuencode.h"
  37 #include "unmime.h"
  38 #include "html.h"
  39 #include "enriched.h"
  40 #include "codeconv.h"
  41 #include "utils.h"
  42 #include "prefs_common.h"
  43
  44 #if USE_GPGME
  45 #  include "rfc2015.h"
  46 #endif
  47
  48 #include "prefs.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->mime_type     = MIME_UNKNOWN;
  58         mimeinfo->encoding_type = ENC_UNKNOWN;
  59
  60         return mimeinfo;
  61 }
  62
  63 void procmime_mimeinfo_free(MimeInfo *mimeinfo)
  64 {
  65         if (!mimeinfo) return;
  66
  67         g_free(mimeinfo->encoding);
  68         g_free(mimeinfo->content_type);
  69         g_free(mimeinfo->charset);
  70         g_free(mimeinfo->name);
  71         g_free(mimeinfo->boundary);
  72         g_free(mimeinfo->content_disposition);
  73         g_free(mimeinfo->filename);
  74 #if USE_GPGME
  75         g_free(mimeinfo->plaintextfile);
  76         g_free(mimeinfo->sigstatus);
  77         g_free(mimeinfo->sigstatus_full);
  78 #endif
  79
  80         procmime_mimeinfo_free(mimeinfo->sub);
  81
  82         g_free(mimeinfo);
  83 }
  84
  85 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  86 {
  87         while (mimeinfo != NULL) {
  88                 MimeInfo *next;
  89
  90                 g_free(mimeinfo->encoding);
  91                 g_free(mimeinfo->content_type);
  92                 g_free(mimeinfo->charset);
  93                 g_free(mimeinfo->name);
  94                 g_free(mimeinfo->boundary);
  95                 g_free(mimeinfo->content_disposition);
  96                 g_free(mimeinfo->filename);
  97 #if USE_GPGME
  98                 g_free(mimeinfo->plaintextfile);
  99                 g_free(mimeinfo->sigstatus);
 100                 g_free(mimeinfo->sigstatus_full);
 101 #endif
 102
 103                 procmime_mimeinfo_free_all(mimeinfo->sub);
 104                 procmime_mimeinfo_free_all(mimeinfo->children);
 105 #if USE_GPGME
 106                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
 107 #endif
 108
 109                 next = mimeinfo->next;
 110                 g_free(mimeinfo);
 111                 mimeinfo = next;
 112         }
 113 }
 114
 115 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 116 {
 117         MimeInfo *child = parent->children;
 118
 119         if (!child)
 120                 parent->children = mimeinfo;
 121         else {
 122                 while (child->next != NULL)
 123                         child = child->next;
 124
 125                 child->next = mimeinfo;
 126         }
 127
 128         mimeinfo->parent = parent;
 129         mimeinfo->level = parent->level + 1;
 130
 131         return mimeinfo;
 132 }
 133
 134 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 135 {
 136         MimeInfo *parent = old->parent;
 137         MimeInfo *child;
 138
 139         g_return_if_fail(parent != NULL);
 140         g_return_if_fail(new->next == NULL);
 141
 142         for (child = parent->children; child && child != old;
 143              child = child->next)
 144                 ;
 145         if (!child) {
 146                 g_warning("oops: parent can't find it's own child");
 147                 return;
 148         }
 149         procmime_mimeinfo_free_all(old);
 150
 151         if (child == parent->children) {
 152                 new->next = parent->children->next;
 153                 parent->children = new;
 154         } else {
 155                 new->next = child->next;
 156                 child = new;
 157         }
 158 }
 159
 160 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 161 {
 162         if (!mimeinfo) return NULL;
 163
 164         if (mimeinfo->children)
 165                 return mimeinfo->children;
 166         if (mimeinfo->sub)
 167                 return mimeinfo->sub;
 168         if (mimeinfo->next)
 169                 return mimeinfo->next;
 170
 171         if (mimeinfo->main) {
 172                 mimeinfo = mimeinfo->main;
 173                 if (mimeinfo->next)
 174                         return mimeinfo->next;
 175         }
 176
 177         for (mimeinfo = mimeinfo->parent; mimeinfo != NULL;
 178              mimeinfo = mimeinfo->parent) {
 179                 if (mimeinfo->next)
 180                         return mimeinfo->next;
 181                 if (mimeinfo->main) {
 182                         mimeinfo = mimeinfo->main;
 183                         if (mimeinfo->next)
 184                                 return mimeinfo->next;
 185                 }
 186         }
 187
 188         return NULL;
 189 }
 190
 191 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 192 {
 193         FILE *fp;
 194         MimeInfo *mimeinfo;
 195
 196         g_return_val_if_fail(msginfo != NULL, NULL);
 197
 198         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 199         mimeinfo = procmime_scan_mime_header(fp);
 200
 201         if (mimeinfo) {
 202                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 203                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 204                                 perror("fseek");
 205                 }
 206                 if (mimeinfo->mime_type != MIME_TEXT)
 207                         procmime_scan_multipart_message(mimeinfo, fp);
 208         }
 209
 210 #if USE_GPGME
 211         if (prefs_common.auto_check_signatures)
 212                 rfc2015_check_signature(mimeinfo, fp);
 213 #endif
 214         fclose(fp);
 215
 216         return mimeinfo;
 217 }
 218
 219 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 220 {
 221         gchar *p;
 222         gchar *boundary;
 223         gint boundary_len = 0;
 224         gchar buf[BUFFSIZE];
 225         glong fpos, prev_fpos;
 226         gint npart;
 227
 228         g_return_if_fail(mimeinfo != NULL);
 229         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 230
 231         if (mimeinfo->mime_type == MIME_MULTIPART) {
 232                 g_return_if_fail(mimeinfo->boundary != NULL);
 233                 g_return_if_fail(mimeinfo->sub == NULL);
 234         }
 235         g_return_if_fail(fp != NULL);
 236
 237         boundary = mimeinfo->boundary;
 238
 239         if (boundary) {
 240                 boundary_len = strlen(boundary);
 241
 242                 /* look for first boundary */
 243                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 244                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 245                 if (!p) return;
 246         }
 247
 248         if ((fpos = ftell(fp)) < 0) {
 249                 perror("ftell");
 250                 return;
 251         }
 252
 253         for (npart = 0;; npart++) {
 254                 MimeInfo *partinfo;
 255                 gboolean eom = FALSE;
 256
 257                 prev_fpos = fpos;
 258                 debug_print("prev_fpos: %ld\n", fpos);
 259
 260                 partinfo = procmime_scan_mime_header(fp);
 261                 if (!partinfo) break;
 262                 procmime_mimeinfo_insert(mimeinfo, partinfo);
 263
 264                 if (partinfo->mime_type == MIME_MULTIPART) {
 265                         if (partinfo->level < 8)
 266                                 procmime_scan_multipart_message(partinfo, fp);
 267                 } else if (partinfo->mime_type == MIME_MESSAGE_RFC822) {
 268                         MimeInfo *sub;
 269
 270                         partinfo->sub = sub = procmime_scan_mime_header(fp);
 271                         if (!sub) break;
 272
 273                         sub->level = partinfo->level + 1;
 274                         sub->parent = partinfo;
 275                         sub->main = partinfo;
 276
 277                         if (sub->level < 8) {
 278                                 if (sub->mime_type == MIME_MULTIPART) {
 279                                         procmime_scan_multipart_message
 280                                                 (sub, fp);
 281                                 } else if (sub->mime_type == MIME_MESSAGE_RFC822) {
 282                                         fseek(fp, sub->fpos, SEEK_SET);
 283                                         procmime_scan_multipart_message
 284                                                 (sub, fp);
 285                                 }
 286                         }
 287                 }
 288
 289                 /* look for next boundary */
 290                 buf[0] = '\0';
 291                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 292                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 293                                 if (buf[2 + boundary_len]     == '-' &&
 294                                     buf[2 + boundary_len + 1] == '-')
 295                                         eom = TRUE;
 296                                 break;
 297                         }
 298                 }
 299                 if (p == NULL) {
 300                         /* broken MIME, or single part MIME message */
 301                         buf[0] = '\0';
 302                         eom = TRUE;
 303                 }
 304                 fpos = ftell(fp);
 305                 debug_print("fpos: %ld\n", fpos);
 306
 307                 partinfo->size = fpos - prev_fpos - strlen(buf);
 308                 debug_print("partinfo->size: %d\n", partinfo->size);
 309                 if (partinfo->sub && !partinfo->sub->sub &&
 310                     !partinfo->sub->children) {
 311                         partinfo->sub->size = fpos - partinfo->sub->fpos - strlen(buf);
 312                         debug_print("partinfo->sub->size: %d\n",
 313                                     partinfo->sub->size);
 314                 }
 315                 debug_print("boundary: %s\n", buf);
 316
 317                 if (eom) break;
 318         }
 319 }
 320
 321 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 322 {
 323         gchar *buf;
 324
 325         Xstrdup_a(buf, encoding, return);
 326
 327         g_free(mimeinfo->encoding);
 328
 329         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 330         if (!strcasecmp(buf, "7bit"))
 331                 mimeinfo->encoding_type = ENC_7BIT;
 332         else if (!strcasecmp(buf, "8bit"))
 333                 mimeinfo->encoding_type = ENC_8BIT;
 334         else if (!strcasecmp(buf, "quoted-printable"))
 335                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 336         else if (!strcasecmp(buf, "base64"))
 337                 mimeinfo->encoding_type = ENC_BASE64;
 338         else if (!strcasecmp(buf, "x-uuencode"))
 339                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 340         else
 341                 mimeinfo->encoding_type = ENC_UNKNOWN;
 342
 343 }
 344
 345 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 346 {
 347         gchar *delim, *p, *cnttype;
 348         gchar *buf;
 349
 350         if (conv_get_current_charset() == C_EUC_JP &&
 351             strchr(content_type, '\033')) {
 352                 gint len;
 353                 len = strlen(content_type) * 2 + 1;
 354                 Xalloca(buf, len, return);
 355                 conv_jistoeuc(buf, len, content_type);
 356         } else
 357                 Xstrdup_a(buf, content_type, return);
 358
 359         g_free(mimeinfo->content_type);
 360         g_free(mimeinfo->charset);
 361         /* g_free(mimeinfo->name); */
 362         mimeinfo->content_type = NULL;
 363         mimeinfo->charset      = NULL;
 364         /* mimeinfo->name      = NULL; */
 365
 366         if ((delim = strchr(buf, ';'))) *delim = '\0';
 367         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 368
 369         mimeinfo->mime_type = procmime_scan_mime_type(cnttype);
 370
 371         if (!delim) return;
 372         p = delim + 1;
 373
 374         for (;;) {
 375                 gchar *eq;
 376                 gchar *attr, *value;
 377
 378                 if ((delim = strchr(p, ';'))) *delim = '\0';
 379
 380                 if (!(eq = strchr(p, '='))) break;
 381
 382                 *eq = '\0';
 383                 attr = p;
 384                 g_strstrip(attr);
 385                 value = eq + 1;
 386                 g_strstrip(value);
 387
 388                 if (*value == '"')
 389                         extract_quote(value, '"');
 390                 else {
 391                         eliminate_parenthesis(value, '(', ')');
 392                         g_strstrip(value);
 393                 }
 394
 395                 if (*value) {
 396                         if (!strcasecmp(attr, "charset"))
 397                                 mimeinfo->charset = g_strdup(value);
 398                         else if (!strcasecmp(attr, "name")) {
 399                                 gchar *tmp;
 400                                 size_t len;
 401
 402                                 len = strlen(value) + 1;
 403                                 Xalloca(tmp, len, return);
 404                                 conv_unmime_header(tmp, len, value, NULL);
 405                                 g_free(mimeinfo->name);
 406                                 /*pgp signatures should NOT have a name */
 407                                 if (mimeinfo->content_type
 408                                 &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 409                                         mimeinfo->name = g_strdup(tmp);
 410                         } else if (!strcasecmp(attr, "boundary"))
 411                                 mimeinfo->boundary = g_strdup(value);
 412                 }
 413
 414                 if (!delim) break;
 415                 p = delim + 1;
 416         }
 417
 418         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 419                 mimeinfo->mime_type = MIME_TEXT;
 420 }
 421
 422 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 423                                        const gchar *content_disposition)
 424 {
 425         gchar *delim, *p, *dispos;
 426         gchar *buf;
 427
 428         if (conv_get_current_charset() == C_EUC_JP &&
 429             strchr(content_disposition, '\033')) {
 430                 gint len;
 431                 len = strlen(content_disposition) * 2 + 1;
 432                 Xalloca(buf, len, return);
 433                 conv_jistoeuc(buf, len, content_disposition);
 434         } else
 435                 Xstrdup_a(buf, content_disposition, return);
 436
 437         if ((delim = strchr(buf, ';'))) *delim = '\0';
 438         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 439
 440         if (!delim) return;
 441         p = delim + 1;
 442
 443         for (;;) {
 444                 gchar *eq;
 445                 gchar *attr, *value;
 446
 447                 if ((delim = strchr(p, ';'))) *delim = '\0';
 448
 449                 if (!(eq = strchr(p, '='))) break;
 450
 451                 *eq = '\0';
 452                 attr = p;
 453                 g_strstrip(attr);
 454                 value = eq + 1;
 455                 g_strstrip(value);
 456
 457                 if (*value == '"')
 458                         extract_quote(value, '"');
 459                 else {
 460                         eliminate_parenthesis(value, '(', ')');
 461                         g_strstrip(value);
 462                 }
 463
 464                 if (*value) {
 465                         if (!strcasecmp(attr, "filename")) {
 466                                 gchar *tmp;
 467                                 size_t len;
 468
 469                                 len = strlen(value) + 1;
 470                                 Xalloca(tmp, len, return);
 471                                 conv_unmime_header(tmp, len, value, NULL);
 472                                 g_free(mimeinfo->filename);
 473                                 /*pgp signatures should NOT have a name */
 474                                 if (mimeinfo->content_type
 475                                 &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 476                                         mimeinfo->filename = g_strdup(tmp);
 477                                 break;
 478                         }
 479                 }
 480
 481                 if (!delim) break;
 482                 p = delim + 1;
 483         }
 484 }
 485
 486 void procmime_scan_content_description(MimeInfo *mimeinfo,
 487                                        const gchar *content_description)
 488 {
 489         gchar *buf;
 490
 491         gchar *tmp;
 492         size_t blen;
 493
 494         if (conv_get_current_charset() == C_EUC_JP &&
 495             strchr(content_description, '\033')) {
 496                 gint len;
 497                 len = strlen(content_description) * 2 + 1;
 498                 Xalloca(buf, len, return);
 499                 conv_jistoeuc(buf, len, content_description);
 500         } else
 501                 Xstrdup_a(buf, content_description, return);
 502
 503         blen = strlen(buf) + 1;
 504         Xalloca(tmp, blen, return);
 505         conv_unmime_header(tmp, blen, buf, NULL);
 506         g_free(mimeinfo->name);
 507         mimeinfo->name = NULL;
 508         /*pgp signatures should NOT have a name */
 509         if (mimeinfo->content_type
 510         &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 511                 mimeinfo->name = g_strdup(tmp);
 512 }
 513
 514 void procmime_scan_subject(MimeInfo *mimeinfo,
 515                            const gchar *subject)
 516 {
 517         gchar *buf;
 518
 519         gchar *tmp;
 520         size_t blen;
 521
 522         if (conv_get_current_charset() == C_EUC_JP &&
 523             strchr(subject, '\033')) {
 524                 gint len;
 525                 len = strlen(subject) * 2 + 1;
 526                 Xalloca(buf, len, return);
 527                 conv_jistoeuc(buf, len, subject);
 528         } else
 529                 Xstrdup_a(buf, subject, return);
 530
 531         blen = strlen(buf) + 1;
 532         Xalloca(tmp, blen, return);
 533         conv_unmime_header(tmp, blen, buf, NULL);
 534         g_free(mimeinfo->name);
 535         mimeinfo->name = g_strdup(tmp);
 536 }
 537
 538 enum
 539 {
 540         H_CONTENT_TRANSFER_ENCODING = 0,
 541         H_CONTENT_TYPE              = 1,
 542         H_CONTENT_DISPOSITION       = 2,
 543         H_CONTENT_DESCRIPTION       = 3,
 544         H_SUBJECT                   = 4
 545 };
 546
 547 MimeInfo *procmime_scan_mime_header(FILE *fp)
 548 {
 549         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 550                                                           NULL, FALSE},
 551                                        {"Content-Type:", NULL, TRUE},
 552                                        {"Content-Disposition:",
 553                                                           NULL, TRUE},
 554                                        {"Content-description:",
 555                                                           NULL, TRUE},
 556                                        {"Subject:",
 557                                                           NULL, TRUE},
 558                                        {NULL,             NULL, FALSE}};
 559         gchar buf[BUFFSIZE];
 560         gint hnum;
 561         HeaderEntry *hp;
 562         MimeInfo *mimeinfo;
 563
 564         g_return_val_if_fail(fp != NULL, NULL);
 565
 566         mimeinfo = procmime_mimeinfo_new();
 567         mimeinfo->mime_type = MIME_TEXT;
 568         mimeinfo->encoding_type = ENC_7BIT;
 569         mimeinfo->fpos = ftell(fp);
 570
 571         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 572                != -1) {
 573                 hp = hentry + hnum;
 574
 575                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 576                         procmime_scan_encoding
 577                                 (mimeinfo, buf + strlen(hp->name));
 578                 } else if (H_CONTENT_TYPE == hnum) {
 579                         procmime_scan_content_type
 580                                 (mimeinfo, buf + strlen(hp->name));
 581                 } else if (H_CONTENT_DISPOSITION == hnum) {
 582                         procmime_scan_content_disposition
 583                                 (mimeinfo, buf + strlen(hp->name));
 584                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 585                         procmime_scan_content_description
 586                                 (mimeinfo, buf + strlen(hp->name));
 587                 } else if (H_SUBJECT == hnum) {
 588                         procmime_scan_subject
 589                                 (mimeinfo, buf + strlen(hp->name));
 590                 }
 591         }
 592
 593         if (mimeinfo->mime_type == MIME_APPLICATION_OCTET_STREAM &&
 594             mimeinfo->name) {
 595                 const gchar *type;
 596                 type = procmime_get_mime_type(mimeinfo->name);
 597                 if (type)
 598                         mimeinfo->mime_type = procmime_scan_mime_type(type);
 599         }
 600
 601         if (!mimeinfo->content_type)
 602                         mimeinfo->content_type = g_strdup("text/plain");
 603
 604         return mimeinfo;
 605 }
 606
 607 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 608 {
 609         gchar buf[BUFFSIZE];
 610         gchar *boundary = NULL;
 611         gint boundary_len = 0;
 612         gboolean tmp_file = FALSE;
 613
 614         g_return_val_if_fail(infp != NULL, NULL);
 615         g_return_val_if_fail(mimeinfo != NULL, NULL);
 616
 617         if (!outfp) {
 618                 outfp = my_tmpfile();
 619                 if (!outfp) {
 620                         perror("tmpfile");
 621                         return NULL;
 622                 }
 623                 tmp_file = TRUE;
 624         }
 625
 626         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 627                 boundary = mimeinfo->parent->boundary;
 628                 boundary_len = strlen(boundary);
 629         }
 630
 631         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 632                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 633                        (!boundary ||
 634                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 635                         gint len;
 636                         len = unmime_quoted_printable_line(buf);
 637                         fwrite(buf, len, 1, outfp);
 638                 }
 639         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 640                 gchar outbuf[BUFFSIZE];
 641                 gint len;
 642                 Base64Decoder *decoder;
 643
 644                 decoder = base64_decoder_new();
 645                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 646                        (!boundary ||
 647                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 648                         len = base64_decoder_decode(decoder, buf, outbuf);
 649                         if (len < 0) {
 650                                 g_warning("Bad BASE64 content\n");
 651                                 break;
 652                         }
 653                         fwrite(outbuf, sizeof(gchar), len, outfp);
 654                 }
 655                 base64_decoder_free(decoder);
 656         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 657                 gchar outbuf[BUFFSIZE];
 658                 gint len;
 659                 gboolean flag = FALSE;
 660
 661                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 662                        (!boundary ||
 663                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 664                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 665
 666                         if (flag) {
 667                                 len = fromuutobits(outbuf, buf);
 668                                 if (len <= 0) {
 669                                         if (len < 0)
 670                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 671                                         break;
 672                                 }
 673                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 674                         } else
 675                                 flag = TRUE;
 676                 }
 677         } else {
 678                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 679                        (!boundary ||
 680                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 681                         fputs(buf, outfp);
 682                 }
 683         }
 684
 685         if (tmp_file) rewind(outfp);
 686         return outfp;
 687 }
 688
 689 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 690                        MimeInfo *mimeinfo)
 691 {
 692         FILE *infp, *outfp;
 693         gchar buf[BUFFSIZE];
 694
 695         g_return_val_if_fail(outfile != NULL, -1);
 696         g_return_val_if_fail(infile != NULL, -1);
 697         g_return_val_if_fail(mimeinfo != NULL, -1);
 698
 699         if ((infp = fopen(infile, "rb")) == NULL) {
 700                 FILE_OP_ERROR(infile, "fopen");
 701                 return -1;
 702         }
 703         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 704                 FILE_OP_ERROR(infile, "fseek");
 705                 fclose(infp);
 706                 return -1;
 707         }
 708         if ((outfp = fopen(outfile, "wb")) == NULL) {
 709                 FILE_OP_ERROR(outfile, "fopen");
 710                 fclose(infp);
 711                 return -1;
 712         }
 713
 714         while (fgets(buf, sizeof(buf), infp) != NULL)
 715                 if (buf[0] == '\r' || buf[0] == '\n') break;
 716
 717         procmime_decode_content(outfp, infp, mimeinfo);
 718
 719         fclose(infp);
 720         if (fclose(outfp) == EOF) {
 721                 FILE_OP_ERROR(outfile, "fclose");
 722                 unlink(outfile);
 723                 return -1;
 724         }
 725
 726         return 0;
 727 }
 728
 729 struct ContentRenderer {
 730         char * content_type;
 731         char * renderer;
 732 };
 733
 734 static GList * renderer_list = NULL;
 735
 736 static struct ContentRenderer *
 737 content_renderer_new(char * content_type, char * renderer)
 738 {
 739         struct ContentRenderer * cr;
 740
 741         cr = g_new(struct ContentRenderer, 1);
 742         if (cr == NULL)
 743                 return NULL;
 744
 745         cr->content_type = g_strdup(content_type);
 746         cr->renderer = g_strdup(renderer);
 747
 748         return cr;
 749 }
 750
 751 static void content_renderer_free(struct ContentRenderer * cr)
 752 {
 753         g_free(cr->content_type);
 754         g_free(cr->renderer);
 755         g_free(cr);
 756 }
 757
 758 void renderer_read_config(void)
 759 {
 760         gchar buf[BUFFSIZE];
 761         FILE * f;
 762         gchar * rcpath;
 763
 764         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 765         renderer_list = NULL;
 766
 767         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 768         f = fopen(rcpath, "rb");
 769         g_free(rcpath);
 770
 771         if (f == NULL)
 772                 return;
 773
 774         while (fgets(buf, BUFFSIZE, f)) {
 775                 char * p;
 776                 struct ContentRenderer * cr;
 777
 778                 strretchomp(buf);
 779                 p = strchr(buf, ' ');
 780                 if (p == NULL)
 781                         continue;
 782                 * p = 0;
 783
 784                 cr = content_renderer_new(buf, p + 1);
 785                 if (cr == NULL)
 786                         continue;
 787
 788                 renderer_list = g_list_append(renderer_list, cr);
 789         }
 790
 791         fclose(f);
 792 }
 793
 794 void renderer_write_config(void)
 795 {
 796         gchar * rcpath;
 797         PrefFile *pfile;
 798         GList * cur;
 799
 800         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 801
 802         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 803                 g_warning(_("failed to write configuration to file\n"));
 804                 g_free(rcpath);
 805                 return;
 806         }
 807
 808         g_free(rcpath);
 809
 810         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 811                 struct ContentRenderer * renderer;
 812                 renderer = cur->data;
 813                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 814                         renderer->renderer);
 815         }
 816
 817         if (prefs_write_close(pfile) < 0) {
 818                 g_warning(_("failed to write configuration to file\n"));
 819                 return;
 820         }
 821 }
 822
 823 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 824 {
 825         FILE *tmpfp, *outfp;
 826         gchar *src_codeset;
 827         gboolean conv_fail = FALSE;
 828         gchar buf[BUFFSIZE];
 829         gchar *str;
 830         struct ContentRenderer * renderer;
 831         GList * cur;
 832
 833         g_return_val_if_fail(mimeinfo != NULL, NULL);
 834         g_return_val_if_fail(infp != NULL, NULL);
 835         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 836                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 837                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 838
 839         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 840                 perror("fseek");
 841                 return NULL;
 842         }
 843
 844         while (fgets(buf, sizeof(buf), infp) != NULL)
 845                 if (buf[0] == '\r' || buf[0] == '\n') break;
 846
 847         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 848         if (!tmpfp)
 849                 return NULL;
 850
 851         if ((outfp = my_tmpfile()) == NULL) {
 852                 perror("tmpfile");
 853                 fclose(tmpfp);
 854                 return NULL;
 855         }
 856
 857         src_codeset = prefs_common.force_charset
 858                 ? prefs_common.force_charset : mimeinfo->charset;
 859
 860         renderer = NULL;
 861
 862         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 863                 struct ContentRenderer * cr;
 864                 cr = cur->data;
 865                 if (g_strcasecmp(cr->content_type,
 866                                  mimeinfo->content_type) == 0) {
 867                         renderer = cr;
 868                         break;
 869                 }
 870         }
 871
 872         if (renderer != NULL) {
 873                 FILE * p;
 874                 int oldout;
 875
 876                 oldout = dup(1);
 877
 878                 dup2(fileno(outfp), 1);
 879
 880                 p = popen(renderer->renderer, "w");
 881                 if (p != NULL) {
 882                         size_t count;
 883
 884                         while ((count =
 885                                 fread(buf, sizeof(char), sizeof(buf),
 886                                       tmpfp)) > 0)
 887                                 fwrite(buf, sizeof(char), count, p);
 888                         pclose(p);
 889                 }
 890
 891                 dup2(oldout, 1);
 892         } else if (mimeinfo->mime_type == MIME_TEXT) {
 893                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 894                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 895                         if (str) {
 896                                 fputs(str, outfp);
 897                                 g_free(str);
 898                         } else {
 899                                 conv_fail = TRUE;
 900                                 fputs(buf, outfp);
 901                         }
 902                 }
 903         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 904                 HTMLParser *parser;
 905                 CodeConverter *conv;
 906
 907                 conv = conv_code_converter_new(src_codeset);
 908                 parser = html_parser_new(tmpfp, conv);
 909                 while ((str = html_parse(parser)) != NULL) {
 910                         fputs(str, outfp);
 911                 }
 912                 html_parser_destroy(parser);
 913                 conv_code_converter_destroy(conv);
 914         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 915                 ERTFParser *parser;
 916                 CodeConverter *conv;
 917
 918                 conv = conv_code_converter_new(src_codeset);
 919                 parser = ertf_parser_new(tmpfp, conv);
 920                 while ((str = ertf_parse(parser)) != NULL) {
 921                         fputs(str, outfp);
 922                 }
 923                 ertf_parser_destroy(parser);
 924                 conv_code_converter_destroy(conv);
 925         }
 926
 927         if (conv_fail)
 928                 g_warning(_("procmime_get_text_content(): Code conversion failed.\n"));
 929
 930         fclose(tmpfp);
 931         rewind(outfp);
 932
 933         return outfp;
 934 }
 935
 936 /* search the first text part of (multipart) MIME message,
 937    decode, convert it and output to outfp. */
 938 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 939 {
 940         FILE *infp, *outfp = NULL;
 941         MimeInfo *mimeinfo, *partinfo;
 942
 943         g_return_val_if_fail(msginfo != NULL, NULL);
 944
 945         mimeinfo = procmime_scan_message(msginfo);
 946         if (!mimeinfo) return NULL;
 947
 948         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 949                 procmime_mimeinfo_free_all(mimeinfo);
 950                 return NULL;
 951         }
 952
 953         partinfo = mimeinfo;
 954         while (partinfo && partinfo->mime_type != MIME_TEXT)
 955                 partinfo = procmime_mimeinfo_next(partinfo);
 956         if (!partinfo) {
 957                 partinfo = mimeinfo;
 958                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 959                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 960                         partinfo = procmime_mimeinfo_next(partinfo);
 961         }
 962
 963
 964         if (partinfo)
 965                 outfp = procmime_get_text_content(partinfo, infp);
 966
 967         fclose(infp);
 968         procmime_mimeinfo_free_all(mimeinfo);
 969
 970         return outfp;
 971 }
 972
 973 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 974                                    const gchar *str, gboolean case_sens)
 975 {
 976
 977         FILE *infp, *outfp;
 978         gchar buf[BUFFSIZE];
 979         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 980
 981         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 982         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 983                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 984                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 985         g_return_val_if_fail(str != NULL, FALSE);
 986
 987         if ((infp = fopen(filename, "rb")) == NULL) {
 988                 FILE_OP_ERROR(filename, "fopen");
 989                 return FALSE;
 990         }
 991
 992         outfp = procmime_get_text_content(mimeinfo, infp);
 993         fclose(infp);
 994
 995         if (!outfp)
 996                 return FALSE;
 997
 998         if (case_sens)
 999                 StrFindFunc = strstr;
1000         else
1001                 StrFindFunc = strcasestr;
1002
1003         while (fgets(buf, sizeof(buf), outfp) != NULL) {
1004                 if (StrFindFunc(buf, str) != NULL) {
1005                         fclose(outfp);
1006                         return TRUE;
1007                 }
1008         }
1009
1010         fclose(outfp);
1011
1012         return FALSE;
1013 }
1014
1015 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
1016                               gboolean case_sens)
1017 {
1018         MimeInfo *mimeinfo;
1019         MimeInfo *partinfo;
1020         gchar *filename;
1021         gboolean found = FALSE;
1022
1023         g_return_val_if_fail(msginfo != NULL, FALSE);
1024         g_return_val_if_fail(str != NULL, FALSE);
1025
1026         filename = procmsg_get_message_file(msginfo);
1027         if (!filename) return FALSE;
1028         mimeinfo = procmime_scan_message(msginfo);
1029
1030         for (partinfo = mimeinfo; partinfo != NULL;
1031              partinfo = procmime_mimeinfo_next(partinfo)) {
1032                 if (partinfo->mime_type == MIME_TEXT ||
1033                     partinfo->mime_type == MIME_TEXT_HTML ||
1034                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1035                         if (procmime_find_string_part
1036                                 (partinfo, filename, str, case_sens) == TRUE) {
1037                                 found = TRUE;
1038                                 break;
1039                         }
1040                 }
1041         }
1042
1043         procmime_mimeinfo_free_all(mimeinfo);
1044         g_free(filename);
1045
1046         return found;
1047 }
1048
1049 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1050 {
1051         static guint32 id = 0;
1052         gchar *base;
1053         gchar *filename;
1054         gchar f_prefix[10];
1055
1056         g_return_val_if_fail(mimeinfo != NULL, NULL);
1057
1058         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1059
1060         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1061                 base = "mimetmp.html";
1062         else {
1063                 base = mimeinfo->filename ? mimeinfo->filename
1064                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1065                 base = g_basename(base);
1066                 if (*base == '\0') base = "mimetmp";
1067                 Xstrdup_a(base, base, return NULL);
1068                 subst_for_filename(base);
1069         }
1070
1071         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1072                                f_prefix, base, NULL);
1073
1074         return filename;
1075 }
1076
1077 ContentType procmime_scan_mime_type(const gchar *mime_type)
1078 {
1079         ContentType type;
1080
1081         if (!strncasecmp(mime_type, "text/html", 9))
1082                 type = MIME_TEXT_HTML;
1083         else if (!strncasecmp(mime_type, "text/enriched", 13))
1084                 type = MIME_TEXT_ENRICHED;
1085         else if (!strncasecmp(mime_type, "text/", 5))
1086                 type = MIME_TEXT;
1087         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1088                 type = MIME_MESSAGE_RFC822;
1089         else if (!strncasecmp(mime_type, "message/", 8))
1090                 type = MIME_TEXT;
1091         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1092                 type = MIME_APPLICATION_OCTET_STREAM;
1093         else if (!strncasecmp(mime_type, "application/", 12))
1094                 type = MIME_APPLICATION;
1095         else if (!strncasecmp(mime_type, "multipart/", 10))
1096                 type = MIME_MULTIPART;
1097         else if (!strncasecmp(mime_type, "image/", 6))
1098                 type = MIME_IMAGE;
1099         else if (!strncasecmp(mime_type, "audio/", 6))
1100                 type = MIME_AUDIO;
1101         else if (!strcasecmp(mime_type, "text"))
1102                 type = MIME_TEXT;
1103         else
1104                 type = MIME_UNKNOWN;
1105
1106         return type;
1107 }
1108
1109 static GList *mime_type_list = NULL;
1110
1111 gchar *procmime_get_mime_type(const gchar *filename)
1112 {
1113         static GHashTable *mime_type_table = NULL;
1114         MimeType *mime_type;
1115         const gchar *p;
1116         gchar *ext;
1117
1118         if (!mime_type_table) {
1119                 mime_type_table = procmime_get_mime_type_table();
1120                 if (!mime_type_table) return NULL;
1121         }
1122
1123         filename = g_basename(filename);
1124         p = strrchr(filename, '.');
1125         if (!p) return NULL;
1126
1127         Xstrdup_a(ext, p + 1, return NULL);
1128         g_strdown(ext);
1129         mime_type = g_hash_table_lookup(mime_type_table, ext);
1130         if (mime_type) {
1131                 gchar *str;
1132
1133                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1134                                   NULL);
1135                 return str;
1136         }
1137
1138         return NULL;
1139 }
1140
1141 static guint procmime_str_hash(gconstpointer gptr)
1142 {
1143         guint hash_result = 0;
1144         const char *str;
1145
1146         for (str = gptr; str && *str; str++) {
1147                 if (isupper(*str)) hash_result += (*str + ' ');
1148                 else hash_result += *str;
1149         }
1150
1151         return hash_result;
1152 }
1153
1154 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1155 {
1156         const char *str1 = gptr1;
1157         const char *str2 = gptr2;
1158
1159         return !strcasecmp(str1, str2);
1160 }
1161
1162 static GHashTable *procmime_get_mime_type_table(void)
1163 {
1164         GHashTable *table = NULL;
1165         GList *cur;
1166         MimeType *mime_type;
1167         gchar **exts;
1168
1169         if (!mime_type_list) {
1170                 mime_type_list = procmime_get_mime_type_list();
1171                 if (!mime_type_list) return NULL;
1172         }
1173
1174         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1175
1176         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1177                 gint i;
1178                 gchar *key;
1179
1180                 mime_type = (MimeType *)cur->data;
1181
1182                 if (!mime_type->extension) continue;
1183
1184                 exts = g_strsplit(mime_type->extension, " ", 16);
1185                 for (i = 0; exts[i] != NULL; i++) {
1186                         /* make the key case insensitive */
1187                         g_strdown(exts[i]);
1188                         /* use previously dup'd key on overwriting */
1189                         if (g_hash_table_lookup(table, exts[i]))
1190                                 key = exts[i];
1191                         else
1192                                 key = g_strdup(exts[i]);
1193                         g_hash_table_insert(table, key, mime_type);
1194                 }
1195                 g_strfreev(exts);
1196         }
1197
1198         return table;
1199 }
1200
1201 GList *procmime_get_mime_type_list(void)
1202 {
1203         GList *list = NULL;
1204         FILE *fp;
1205         gchar buf[BUFFSIZE];
1206         gchar *p, *delim;
1207         MimeType *mime_type;
1208
1209         if (mime_type_list)
1210                 return mime_type_list;
1211
1212         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
1213                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
1214                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1215                         return NULL;
1216                 }
1217         }
1218
1219         while (fgets(buf, sizeof(buf), fp) != NULL) {
1220                 p = strchr(buf, '#');
1221                 if (p) *p = '\0';
1222                 g_strstrip(buf);
1223
1224                 p = buf;
1225                 while (*p && !isspace(*p)) p++;
1226                 if (*p) {
1227                         *p = '\0';
1228                         p++;
1229                 }
1230                 delim = strchr(buf, '/');
1231                 if (delim == NULL) continue;
1232                 *delim = '\0';
1233
1234                 mime_type = g_new(MimeType, 1);
1235                 mime_type->type = g_strdup(buf);
1236                 mime_type->sub_type = g_strdup(delim + 1);
1237
1238                 while (*p && isspace(*p)) p++;
1239                 if (*p)
1240                         mime_type->extension = g_strdup(p);
1241                 else
1242                         mime_type->extension = NULL;
1243
1244                 list = g_list_append(list, mime_type);
1245         }
1246
1247         fclose(fp);
1248
1249         if (!list)
1250                 g_warning("Can't read mime.types\n");
1251
1252         return list;
1253 }
1254
1255 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1256 {
1257         if (!charset)
1258                 return ENC_8BIT;
1259         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1260                  !strcasecmp(charset, "US-ASCII"))
1261                 return ENC_7BIT;
1262         else
1263                 return ENC_8BIT;
1264                 /* return ENC_BASE64; */
1265                 /* return ENC_QUOTED_PRINTABLE; */
1266 }
1267
1268 EncodingType procmime_get_encoding_for_file(const gchar *file)
1269 {
1270         FILE *fp;
1271         guchar buf[BUFSIZ];
1272         size_t len;
1273
1274         if ((fp = fopen(file, "rb")) == NULL) {
1275                 FILE_OP_ERROR(file, "fopen");
1276                 return ENC_UNKNOWN;
1277         }
1278
1279         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
1280                 guchar *p;
1281                 gint i;
1282
1283                 for (p = buf, i = 0; i < len; p++, i++) {
1284                         if (*p & 0x80) {
1285                                 fclose(fp);
1286                                 return ENC_BASE64;
1287                         }
1288                 }
1289         }
1290
1291         fclose(fp);
1292         return ENC_7BIT;
1293 }
1294
1295 struct EncodingTable
1296 {
1297         gchar *str;
1298         EncodingType enc_type;
1299 };
1300
1301 struct EncodingTable encoding_table[] = {
1302         {"7bit", ENC_7BIT},
1303         {"8bit", ENC_8BIT},
1304         {"binary", ENC_BINARY},
1305         {"quoted-printable", ENC_QUOTED_PRINTABLE},
1306         {"base64", ENC_BASE64},
1307         {"x-uuencode", ENC_UNKNOWN},
1308         {NULL, ENC_UNKNOWN},
1309 };
1310
1311 const gchar *procmime_get_encoding_str(EncodingType encoding)
1312 {
1313         struct EncodingTable *enc_table;
1314
1315         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1316                 if (enc_table->enc_type == encoding)
1317                         return enc_table->str;
1318         }
1319         return NULL;
1320 }