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         /*pgp signatures should NOT have a name */
 508         if (mimeinfo->content_type
 509         &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 510                 mimeinfo->name = g_strdup(tmp);
 511 }
 512
 513 void procmime_scan_subject(MimeInfo *mimeinfo,
 514                            const gchar *subject)
 515 {
 516         gchar *buf;
 517
 518         gchar *tmp;
 519         size_t blen;
 520
 521         if (conv_get_current_charset() == C_EUC_JP &&
 522             strchr(subject, '\033')) {
 523                 gint len;
 524                 len = strlen(subject) * 2 + 1;
 525                 Xalloca(buf, len, return);
 526                 conv_jistoeuc(buf, len, subject);
 527         } else
 528                 Xstrdup_a(buf, subject, return);
 529
 530         blen = strlen(buf) + 1;
 531         Xalloca(tmp, blen, return);
 532         conv_unmime_header(tmp, blen, buf, NULL);
 533         g_free(mimeinfo->name);
 534         mimeinfo->name = g_strdup(tmp);
 535 }
 536
 537 enum
 538 {
 539         H_CONTENT_TRANSFER_ENCODING = 0,
 540         H_CONTENT_TYPE              = 1,
 541         H_CONTENT_DISPOSITION       = 2,
 542         H_CONTENT_DESCRIPTION       = 3,
 543         H_SUBJECT                   = 4
 544 };
 545
 546 MimeInfo *procmime_scan_mime_header(FILE *fp)
 547 {
 548         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 549                                                           NULL, FALSE},
 550                                        {"Content-Type:", NULL, TRUE},
 551                                        {"Content-Disposition:",
 552                                                           NULL, TRUE},
 553                                        {"Content-description:",
 554                                                           NULL, TRUE},
 555                                        {"Subject:",
 556                                                           NULL, TRUE},
 557                                        {NULL,             NULL, FALSE}};
 558         gchar buf[BUFFSIZE];
 559         gint hnum;
 560         HeaderEntry *hp;
 561         MimeInfo *mimeinfo;
 562
 563         g_return_val_if_fail(fp != NULL, NULL);
 564
 565         mimeinfo = procmime_mimeinfo_new();
 566         mimeinfo->mime_type = MIME_TEXT;
 567         mimeinfo->encoding_type = ENC_7BIT;
 568         mimeinfo->fpos = ftell(fp);
 569
 570         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 571                != -1) {
 572                 hp = hentry + hnum;
 573
 574                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 575                         procmime_scan_encoding
 576                                 (mimeinfo, buf + strlen(hp->name));
 577                 } else if (H_CONTENT_TYPE == hnum) {
 578                         procmime_scan_content_type
 579                                 (mimeinfo, buf + strlen(hp->name));
 580                 } else if (H_CONTENT_DISPOSITION == hnum) {
 581                         procmime_scan_content_disposition
 582                                 (mimeinfo, buf + strlen(hp->name));
 583                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 584                         procmime_scan_content_description
 585                                 (mimeinfo, buf + strlen(hp->name));
 586                 } else if (H_SUBJECT == hnum) {
 587                         procmime_scan_subject
 588                                 (mimeinfo, buf + strlen(hp->name));
 589                 }
 590         }
 591
 592         if (mimeinfo->mime_type == MIME_APPLICATION_OCTET_STREAM &&
 593             mimeinfo->name) {
 594                 const gchar *type;
 595                 type = procmime_get_mime_type(mimeinfo->name);
 596                 if (type)
 597                         mimeinfo->mime_type = procmime_scan_mime_type(type);
 598         }
 599
 600         if (!mimeinfo->content_type)
 601                         mimeinfo->content_type = g_strdup("text/plain");
 602
 603         return mimeinfo;
 604 }
 605
 606 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 607 {
 608         gchar buf[BUFFSIZE];
 609         gchar *boundary = NULL;
 610         gint boundary_len = 0;
 611         gboolean tmp_file = FALSE;
 612
 613         g_return_val_if_fail(infp != NULL, NULL);
 614         g_return_val_if_fail(mimeinfo != NULL, NULL);
 615
 616         if (!outfp) {
 617                 outfp = my_tmpfile();
 618                 if (!outfp) {
 619                         perror("tmpfile");
 620                         return NULL;
 621                 }
 622                 tmp_file = TRUE;
 623         }
 624
 625         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 626                 boundary = mimeinfo->parent->boundary;
 627                 boundary_len = strlen(boundary);
 628         }
 629
 630         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 631                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 632                        (!boundary ||
 633                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 634                         gint len;
 635                         len = unmime_quoted_printable_line(buf);
 636                         fwrite(buf, len, 1, outfp);
 637                 }
 638         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 639                 gchar outbuf[BUFFSIZE];
 640                 gint len;
 641                 Base64Decoder *decoder;
 642
 643                 decoder = base64_decoder_new();
 644                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 645                        (!boundary ||
 646                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 647                         len = base64_decoder_decode(decoder, buf, outbuf);
 648                         if (len < 0) {
 649                                 g_warning("Bad BASE64 content\n");
 650                                 break;
 651                         }
 652                         fwrite(outbuf, sizeof(gchar), len, outfp);
 653                 }
 654                 base64_decoder_free(decoder);
 655         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 656                 gchar outbuf[BUFFSIZE];
 657                 gint len;
 658                 gboolean flag = FALSE;
 659
 660                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 661                        (!boundary ||
 662                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 663                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 664
 665                         if (flag) {
 666                                 len = fromuutobits(outbuf, buf);
 667                                 if (len <= 0) {
 668                                         if (len < 0)
 669                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 670                                         break;
 671                                 }
 672                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 673                         } else
 674                                 flag = TRUE;
 675                 }
 676         } else {
 677                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 678                        (!boundary ||
 679                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 680                         fputs(buf, outfp);
 681                 }
 682         }
 683
 684         if (tmp_file) rewind(outfp);
 685         return outfp;
 686 }
 687
 688 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 689                        MimeInfo *mimeinfo)
 690 {
 691         FILE *infp, *outfp;
 692         gchar buf[BUFFSIZE];
 693
 694         g_return_val_if_fail(outfile != NULL, -1);
 695         g_return_val_if_fail(infile != NULL, -1);
 696         g_return_val_if_fail(mimeinfo != NULL, -1);
 697
 698         if ((infp = fopen(infile, "rb")) == NULL) {
 699                 FILE_OP_ERROR(infile, "fopen");
 700                 return -1;
 701         }
 702         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 703                 FILE_OP_ERROR(infile, "fseek");
 704                 fclose(infp);
 705                 return -1;
 706         }
 707         if ((outfp = fopen(outfile, "wb")) == NULL) {
 708                 FILE_OP_ERROR(outfile, "fopen");
 709                 fclose(infp);
 710                 return -1;
 711         }
 712
 713         while (fgets(buf, sizeof(buf), infp) != NULL)
 714                 if (buf[0] == '\r' || buf[0] == '\n') break;
 715
 716         procmime_decode_content(outfp, infp, mimeinfo);
 717
 718         fclose(infp);
 719         if (fclose(outfp) == EOF) {
 720                 FILE_OP_ERROR(outfile, "fclose");
 721                 unlink(outfile);
 722                 return -1;
 723         }
 724
 725         return 0;
 726 }
 727
 728 struct ContentRenderer {
 729         char * content_type;
 730         char * renderer;
 731 };
 732
 733 static GList * renderer_list = NULL;
 734
 735 static struct ContentRenderer *
 736 content_renderer_new(char * content_type, char * renderer)
 737 {
 738         struct ContentRenderer * cr;
 739
 740         cr = g_new(struct ContentRenderer, 1);
 741         if (cr == NULL)
 742                 return NULL;
 743
 744         cr->content_type = g_strdup(content_type);
 745         cr->renderer = g_strdup(renderer);
 746
 747         return cr;
 748 }
 749
 750 static void content_renderer_free(struct ContentRenderer * cr)
 751 {
 752         g_free(cr->content_type);
 753         g_free(cr->renderer);
 754         g_free(cr);
 755 }
 756
 757 void renderer_read_config(void)
 758 {
 759         gchar buf[BUFFSIZE];
 760         FILE * f;
 761         gchar * rcpath;
 762
 763         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 764         renderer_list = NULL;
 765
 766         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 767         f = fopen(rcpath, "rb");
 768         g_free(rcpath);
 769
 770         if (f == NULL)
 771                 return;
 772
 773         while (fgets(buf, BUFFSIZE, f)) {
 774                 char * p;
 775                 struct ContentRenderer * cr;
 776
 777                 strretchomp(buf);
 778                 p = strchr(buf, ' ');
 779                 if (p == NULL)
 780                         continue;
 781                 * p = 0;
 782
 783                 cr = content_renderer_new(buf, p + 1);
 784                 if (cr == NULL)
 785                         continue;
 786
 787                 renderer_list = g_list_append(renderer_list, cr);
 788         }
 789
 790         fclose(f);
 791 }
 792
 793 void renderer_write_config(void)
 794 {
 795         gchar * rcpath;
 796         PrefFile *pfile;
 797         GList * cur;
 798
 799         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 800
 801         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 802                 g_warning(_("failed to write configuration to file\n"));
 803                 g_free(rcpath);
 804                 return;
 805         }
 806
 807         g_free(rcpath);
 808
 809         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 810                 struct ContentRenderer * renderer;
 811                 renderer = cur->data;
 812                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 813                         renderer->renderer);
 814         }
 815
 816         if (prefs_write_close(pfile) < 0) {
 817                 g_warning(_("failed to write configuration to file\n"));
 818                 return;
 819         }
 820 }
 821
 822 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 823 {
 824         FILE *tmpfp, *outfp;
 825         gchar *src_codeset;
 826         gboolean conv_fail = FALSE;
 827         gchar buf[BUFFSIZE];
 828         gchar *str;
 829         struct ContentRenderer * renderer;
 830         GList * cur;
 831
 832         g_return_val_if_fail(mimeinfo != NULL, NULL);
 833         g_return_val_if_fail(infp != NULL, NULL);
 834         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 835                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 836                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 837
 838         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 839                 perror("fseek");
 840                 return NULL;
 841         }
 842
 843         while (fgets(buf, sizeof(buf), infp) != NULL)
 844                 if (buf[0] == '\r' || buf[0] == '\n') break;
 845
 846         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 847         if (!tmpfp)
 848                 return NULL;
 849
 850         if ((outfp = my_tmpfile()) == NULL) {
 851                 perror("tmpfile");
 852                 fclose(tmpfp);
 853                 return NULL;
 854         }
 855
 856         src_codeset = prefs_common.force_charset
 857                 ? prefs_common.force_charset : mimeinfo->charset;
 858
 859         renderer = NULL;
 860
 861         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 862                 struct ContentRenderer * cr;
 863                 cr = cur->data;
 864                 if (g_strcasecmp(cr->content_type,
 865                                  mimeinfo->content_type) == 0) {
 866                         renderer = cr;
 867                         break;
 868                 }
 869         }
 870
 871         if (renderer != NULL) {
 872                 FILE * p;
 873                 int oldout;
 874
 875                 oldout = dup(1);
 876
 877                 dup2(fileno(outfp), 1);
 878
 879                 p = popen(renderer->renderer, "w");
 880                 if (p != NULL) {
 881                         size_t count;
 882
 883                         while ((count =
 884                                 fread(buf, sizeof(char), sizeof(buf),
 885                                       tmpfp)) > 0)
 886                                 fwrite(buf, sizeof(char), count, p);
 887                         pclose(p);
 888                 }
 889
 890                 dup2(oldout, 1);
 891         } else if (mimeinfo->mime_type == MIME_TEXT) {
 892                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 893                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 894                         if (str) {
 895                                 fputs(str, outfp);
 896                                 g_free(str);
 897                         } else {
 898                                 conv_fail = TRUE;
 899                                 fputs(buf, outfp);
 900                         }
 901                 }
 902         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 903                 HTMLParser *parser;
 904                 CodeConverter *conv;
 905
 906                 conv = conv_code_converter_new(src_codeset);
 907                 parser = html_parser_new(tmpfp, conv);
 908                 while ((str = html_parse(parser)) != NULL) {
 909                         fputs(str, outfp);
 910                 }
 911                 html_parser_destroy(parser);
 912                 conv_code_converter_destroy(conv);
 913         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 914                 ERTFParser *parser;
 915                 CodeConverter *conv;
 916
 917                 conv = conv_code_converter_new(src_codeset);
 918                 parser = ertf_parser_new(tmpfp, conv);
 919                 while ((str = ertf_parse(parser)) != NULL) {
 920                         fputs(str, outfp);
 921                 }
 922                 ertf_parser_destroy(parser);
 923                 conv_code_converter_destroy(conv);
 924         }
 925
 926         if (conv_fail)
 927                 g_warning(_("procmime_get_text_content(): Code conversion failed.\n"));
 928
 929         fclose(tmpfp);
 930         rewind(outfp);
 931
 932         return outfp;
 933 }
 934
 935 /* search the first text part of (multipart) MIME message,
 936    decode, convert it and output to outfp. */
 937 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 938 {
 939         FILE *infp, *outfp = NULL;
 940         MimeInfo *mimeinfo, *partinfo;
 941
 942         g_return_val_if_fail(msginfo != NULL, NULL);
 943
 944         mimeinfo = procmime_scan_message(msginfo);
 945         if (!mimeinfo) return NULL;
 946
 947         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 948                 procmime_mimeinfo_free_all(mimeinfo);
 949                 return NULL;
 950         }
 951
 952         partinfo = mimeinfo;
 953         while (partinfo && partinfo->mime_type != MIME_TEXT)
 954                 partinfo = procmime_mimeinfo_next(partinfo);
 955         if (!partinfo) {
 956                 partinfo = mimeinfo;
 957                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 958                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 959                         partinfo = procmime_mimeinfo_next(partinfo);
 960         }
 961
 962
 963         if (partinfo)
 964                 outfp = procmime_get_text_content(partinfo, infp);
 965
 966         fclose(infp);
 967         procmime_mimeinfo_free_all(mimeinfo);
 968
 969         return outfp;
 970 }
 971
 972 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 973                                    const gchar *str, gboolean case_sens)
 974 {
 975
 976         FILE *infp, *outfp;
 977         gchar buf[BUFFSIZE];
 978         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 979
 980         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 981         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 982                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 983                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 984         g_return_val_if_fail(str != NULL, FALSE);
 985
 986         if ((infp = fopen(filename, "rb")) == NULL) {
 987                 FILE_OP_ERROR(filename, "fopen");
 988                 return FALSE;
 989         }
 990
 991         outfp = procmime_get_text_content(mimeinfo, infp);
 992         fclose(infp);
 993
 994         if (!outfp)
 995                 return FALSE;
 996
 997         if (case_sens)
 998                 StrFindFunc = strstr;
 999         else
1000                 StrFindFunc = strcasestr;
1001
1002         while (fgets(buf, sizeof(buf), outfp) != NULL) {
1003                 if (StrFindFunc(buf, str) != NULL) {
1004                         fclose(outfp);
1005                         return TRUE;
1006                 }
1007         }
1008
1009         fclose(outfp);
1010
1011         return FALSE;
1012 }
1013
1014 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
1015                               gboolean case_sens)
1016 {
1017         MimeInfo *mimeinfo;
1018         MimeInfo *partinfo;
1019         gchar *filename;
1020         gboolean found = FALSE;
1021
1022         g_return_val_if_fail(msginfo != NULL, FALSE);
1023         g_return_val_if_fail(str != NULL, FALSE);
1024
1025         filename = procmsg_get_message_file(msginfo);
1026         if (!filename) return FALSE;
1027         mimeinfo = procmime_scan_message(msginfo);
1028
1029         for (partinfo = mimeinfo; partinfo != NULL;
1030              partinfo = procmime_mimeinfo_next(partinfo)) {
1031                 if (partinfo->mime_type == MIME_TEXT ||
1032                     partinfo->mime_type == MIME_TEXT_HTML ||
1033                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1034                         if (procmime_find_string_part
1035                                 (partinfo, filename, str, case_sens) == TRUE) {
1036                                 found = TRUE;
1037                                 break;
1038                         }
1039                 }
1040         }
1041
1042         procmime_mimeinfo_free_all(mimeinfo);
1043         g_free(filename);
1044
1045         return found;
1046 }
1047
1048 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1049 {
1050         static guint32 id = 0;
1051         gchar *base;
1052         gchar *filename;
1053         gchar f_prefix[10];
1054
1055         g_return_val_if_fail(mimeinfo != NULL, NULL);
1056
1057         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1058
1059         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1060                 base = "mimetmp.html";
1061         else {
1062                 base = mimeinfo->filename ? mimeinfo->filename
1063                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1064                 base = g_basename(base);
1065                 if (*base == '\0') base = "mimetmp";
1066                 Xstrdup_a(base, base, return NULL);
1067                 subst_for_filename(base);
1068         }
1069
1070         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1071                                f_prefix, base, NULL);
1072
1073         return filename;
1074 }
1075
1076 ContentType procmime_scan_mime_type(const gchar *mime_type)
1077 {
1078         ContentType type;
1079
1080         if (!strncasecmp(mime_type, "text/html", 9))
1081                 type = MIME_TEXT_HTML;
1082         else if (!strncasecmp(mime_type, "text/enriched", 13))
1083                 type = MIME_TEXT_ENRICHED;
1084         else if (!strncasecmp(mime_type, "text/", 5))
1085                 type = MIME_TEXT;
1086         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1087                 type = MIME_MESSAGE_RFC822;
1088         else if (!strncasecmp(mime_type, "message/", 8))
1089                 type = MIME_TEXT;
1090         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1091                 type = MIME_APPLICATION_OCTET_STREAM;
1092         else if (!strncasecmp(mime_type, "application/", 12))
1093                 type = MIME_APPLICATION;
1094         else if (!strncasecmp(mime_type, "multipart/", 10))
1095                 type = MIME_MULTIPART;
1096         else if (!strncasecmp(mime_type, "image/", 6))
1097                 type = MIME_IMAGE;
1098         else if (!strncasecmp(mime_type, "audio/", 6))
1099                 type = MIME_AUDIO;
1100         else if (!strcasecmp(mime_type, "text"))
1101                 type = MIME_TEXT;
1102         else
1103                 type = MIME_UNKNOWN;
1104
1105         return type;
1106 }
1107
1108 static GList *mime_type_list = NULL;
1109
1110 gchar *procmime_get_mime_type(const gchar *filename)
1111 {
1112         static GHashTable *mime_type_table = NULL;
1113         MimeType *mime_type;
1114         const gchar *p;
1115         gchar *ext;
1116
1117         if (!mime_type_table) {
1118                 mime_type_table = procmime_get_mime_type_table();
1119                 if (!mime_type_table) return NULL;
1120         }
1121
1122         filename = g_basename(filename);
1123         p = strrchr(filename, '.');
1124         if (!p) return NULL;
1125
1126         Xstrdup_a(ext, p + 1, return NULL);
1127         g_strdown(ext);
1128         mime_type = g_hash_table_lookup(mime_type_table, ext);
1129         if (mime_type) {
1130                 gchar *str;
1131
1132                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1133                                   NULL);
1134                 return str;
1135         }
1136
1137         return NULL;
1138 }
1139
1140 static guint procmime_str_hash(gconstpointer gptr)
1141 {
1142         guint hash_result = 0;
1143         const char *str;
1144
1145         for (str = gptr; str && *str; str++) {
1146                 if (isupper(*str)) hash_result += (*str + ' ');
1147                 else hash_result += *str;
1148         }
1149
1150         return hash_result;
1151 }
1152
1153 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1154 {
1155         const char *str1 = gptr1;
1156         const char *str2 = gptr2;
1157
1158         return !strcasecmp(str1, str2);
1159 }
1160
1161 static GHashTable *procmime_get_mime_type_table(void)
1162 {
1163         GHashTable *table = NULL;
1164         GList *cur;
1165         MimeType *mime_type;
1166         gchar **exts;
1167
1168         if (!mime_type_list) {
1169                 mime_type_list = procmime_get_mime_type_list();
1170                 if (!mime_type_list) return NULL;
1171         }
1172
1173         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1174
1175         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1176                 gint i;
1177                 gchar *key;
1178
1179                 mime_type = (MimeType *)cur->data;
1180
1181                 if (!mime_type->extension) continue;
1182
1183                 exts = g_strsplit(mime_type->extension, " ", 16);
1184                 for (i = 0; exts[i] != NULL; i++) {
1185                         /* make the key case insensitive */
1186                         g_strdown(exts[i]);
1187                         /* use previously dup'd key on overwriting */
1188                         if (g_hash_table_lookup(table, exts[i]))
1189                                 key = exts[i];
1190                         else
1191                                 key = g_strdup(exts[i]);
1192                         g_hash_table_insert(table, key, mime_type);
1193                 }
1194                 g_strfreev(exts);
1195         }
1196
1197         return table;
1198 }
1199
1200 GList *procmime_get_mime_type_list(void)
1201 {
1202         GList *list = NULL;
1203         FILE *fp;
1204         gchar buf[BUFFSIZE];
1205         gchar *p, *delim;
1206         MimeType *mime_type;
1207
1208         if (mime_type_list)
1209                 return mime_type_list;
1210
1211         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
1212                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
1213                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1214                         return NULL;
1215                 }
1216         }
1217
1218         while (fgets(buf, sizeof(buf), fp) != NULL) {
1219                 p = strchr(buf, '#');
1220                 if (p) *p = '\0';
1221                 g_strstrip(buf);
1222
1223                 p = buf;
1224                 while (*p && !isspace(*p)) p++;
1225                 if (*p) {
1226                         *p = '\0';
1227                         p++;
1228                 }
1229                 delim = strchr(buf, '/');
1230                 if (delim == NULL) continue;
1231                 *delim = '\0';
1232
1233                 mime_type = g_new(MimeType, 1);
1234                 mime_type->type = g_strdup(buf);
1235                 mime_type->sub_type = g_strdup(delim + 1);
1236
1237                 while (*p && isspace(*p)) p++;
1238                 if (*p)
1239                         mime_type->extension = g_strdup(p);
1240                 else
1241                         mime_type->extension = NULL;
1242
1243                 list = g_list_append(list, mime_type);
1244         }
1245
1246         fclose(fp);
1247
1248         if (!list)
1249                 g_warning("Can't read mime.types\n");
1250
1251         return list;
1252 }
1253
1254 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1255 {
1256         if (!charset)
1257                 return ENC_8BIT;
1258         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1259                  !strcasecmp(charset, "US-ASCII"))
1260                 return ENC_7BIT;
1261         else
1262                 return ENC_8BIT;
1263                 /* return ENC_BASE64; */
1264                 /* return ENC_QUOTED_PRINTABLE; */
1265 }
1266
1267 EncodingType procmime_get_encoding_for_file(const gchar *file)
1268 {
1269         FILE *fp;
1270         guchar buf[BUFSIZ];
1271         size_t len;
1272
1273         if ((fp = fopen(file, "rb")) == NULL) {
1274                 FILE_OP_ERROR(file, "fopen");
1275                 return ENC_UNKNOWN;
1276         }
1277
1278         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
1279                 guchar *p;
1280                 gint i;
1281
1282                 for (p = buf, i = 0; i < len; p++, i++) {
1283                         if (*p & 0x80) {
1284                                 fclose(fp);
1285                                 return ENC_BASE64;
1286                         }
1287                 }
1288         }
1289
1290         fclose(fp);
1291         return ENC_7BIT;
1292 }
1293
1294 struct EncodingTable
1295 {
1296         gchar *str;
1297         EncodingType enc_type;
1298 };
1299
1300 struct EncodingTable encoding_table[] = {
1301         {"7bit", ENC_7BIT},
1302         {"8bit", ENC_8BIT},
1303         {"binary", ENC_BINARY},
1304         {"quoted-printable", ENC_QUOTED_PRINTABLE},
1305         {"base64", ENC_BASE64},
1306         {"x-uuencode", ENC_UNKNOWN},
1307         {NULL, ENC_UNKNOWN},
1308 };
1309
1310 const gchar *procmime_get_encoding_str(EncodingType encoding)
1311 {
1312         struct EncodingTable *enc_table;
1313
1314         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1315                 if (enc_table->enc_type == encoding)
1316                         return enc_table->str;
1317         }
1318         return NULL;
1319 }