src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <locale.h>
  30 #include <ctype.h>
  31
  32 #include "intl.h"
  33 #include "procmime.h"
  34 #include "procheader.h"
  35 #include "base64.h"
  36 #include "quoted-printable.h"
  37 #include "uuencode.h"
  38 #include "unmime.h"
  39 #include "html.h"
  40 #include "enriched.h"
  41 #include "codeconv.h"
  42 #include "utils.h"
  43 #include "prefs_common.h"
  44
  45 #if USE_GPGME
  46 #  include "rfc2015.h"
  47 #endif
  48
  49 #include "prefs_gtk.h"
  50
  51 static GHashTable *procmime_get_mime_type_table (void);
  52
  53 MimeInfo *procmime_mimeinfo_new(void)
  54 {
  55         MimeInfo *mimeinfo;
  56
  57         mimeinfo = g_new0(MimeInfo, 1);
  58         mimeinfo->mime_type     = MIME_UNKNOWN;
  59         mimeinfo->encoding_type = ENC_UNKNOWN;
  60
  61         return mimeinfo;
  62 }
  63
  64 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  65 {
  66         while (mimeinfo != NULL) {
  67                 MimeInfo *next;
  68
  69                 g_free(mimeinfo->encoding);
  70                 g_free(mimeinfo->content_type);
  71                 g_free(mimeinfo->charset);
  72                 g_free(mimeinfo->name);
  73                 g_free(mimeinfo->boundary);
  74                 g_free(mimeinfo->content_disposition);
  75                 g_free(mimeinfo->filename);
  76                 g_free(mimeinfo->description);
  77 #if USE_GPGME
  78                 g_free(mimeinfo->plaintextfile);
  79                 g_free(mimeinfo->sigstatus);
  80                 g_free(mimeinfo->sigstatus_full);
  81 #endif
  82
  83                 procmime_mimeinfo_free_all(mimeinfo->sub);
  84                 procmime_mimeinfo_free_all(mimeinfo->children);
  85 #if USE_GPGME
  86                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
  87 #endif
  88
  89                 next = mimeinfo->next;
  90                 g_free(mimeinfo);
  91                 mimeinfo = next;
  92         }
  93 }
  94
  95 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
  96 {
  97         MimeInfo *child = parent->children;
  98
  99         if (!child)
 100                 parent->children = mimeinfo;
 101         else {
 102                 while (child->next != NULL)
 103                         child = child->next;
 104
 105                 child->next = mimeinfo;
 106         }
 107
 108         mimeinfo->parent = parent;
 109         mimeinfo->level = parent->level + 1;
 110
 111         return mimeinfo;
 112 }
 113
 114 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 115 {
 116         MimeInfo *parent = old->parent;
 117         MimeInfo *child;
 118
 119         g_return_if_fail(parent != NULL);
 120         g_return_if_fail(new->next == NULL);
 121
 122         for (child = parent->children; child && child != old;
 123              child = child->next)
 124                 ;
 125         if (!child) {
 126                 g_warning("oops: parent can't find it's own child");
 127                 return;
 128         }
 129         procmime_mimeinfo_free_all(old);
 130
 131         if (child == parent->children) {
 132                 new->next = parent->children->next;
 133                 parent->children = new;
 134         } else {
 135                 new->next = child->next;
 136                 child = new;
 137         }
 138 }
 139
 140 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 141 {
 142         if (!mimeinfo) return NULL;
 143
 144         if (mimeinfo->children)
 145                 return mimeinfo->children;
 146         if (mimeinfo->sub)
 147                 return mimeinfo->sub;
 148         if (mimeinfo->next)
 149                 return mimeinfo->next;
 150
 151         if (mimeinfo->main) {
 152                 mimeinfo = mimeinfo->main;
 153                 if (mimeinfo->next)
 154                         return mimeinfo->next;
 155         }
 156
 157         for (mimeinfo = mimeinfo->parent; mimeinfo != NULL;
 158              mimeinfo = mimeinfo->parent) {
 159                 if (mimeinfo->next)
 160                         return mimeinfo->next;
 161                 if (mimeinfo->main) {
 162                         mimeinfo = mimeinfo->main;
 163                         if (mimeinfo->next)
 164                                 return mimeinfo->next;
 165                 }
 166         }
 167
 168         return NULL;
 169 }
 170
 171 #if 0
 172 void procmime_dump_mimeinfo(MimeInfo *mimeinfo)
 173 {
 174         gint i;
 175
 176         g_print("\n");
 177
 178         for (; mimeinfo != NULL; mimeinfo = procmime_mimeinfo_next(mimeinfo)) {
 179                 for (i = 0; i < mimeinfo->level; i++)
 180                         g_print("  ");
 181                 g_print("%s%s\n", mimeinfo->main ? "sub: " : "",
 182                         mimeinfo->content_type);
 183         }
 184 }
 185 #endif
 186
 187 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 188 {
 189         FILE *fp;
 190         MimeInfo *mimeinfo;
 191
 192         g_return_val_if_fail(msginfo != NULL, NULL);
 193
 194 #if USE_GPGME
 195         if ((fp = procmsg_open_message_decrypted(msginfo, &mimeinfo)) == NULL)
 196                 return NULL;
 197 #else
 198         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 199         mimeinfo = procmime_scan_mime_header(fp);
 200 #endif
 201
 202         if (mimeinfo) {
 203                 mimeinfo->size = get_left_file_size(fp);
 204                 if (mimeinfo->mime_type == MIME_MULTIPART ||
 205                     mimeinfo->mime_type == MIME_MESSAGE_RFC822)
 206                         procmime_scan_multipart_message(mimeinfo, fp);
 207         }
 208
 209         fclose(fp);
 210
 211         return mimeinfo;
 212 }
 213
 214 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 215 {
 216         gchar *p;
 217         gchar *boundary;
 218         gint boundary_len = 0;
 219         gchar buf[BUFFSIZE];
 220         glong fpos, prev_fpos;
 221
 222         g_return_if_fail(mimeinfo != NULL);
 223         g_return_if_fail(mimeinfo->mime_type == MIME_MULTIPART ||
 224                          mimeinfo->mime_type == MIME_MESSAGE_RFC822);
 225
 226         if (mimeinfo->mime_type == MIME_MULTIPART) {
 227                 g_return_if_fail(mimeinfo->boundary != NULL);
 228                 g_return_if_fail(mimeinfo->sub == NULL);
 229         }
 230         g_return_if_fail(fp != NULL);
 231
 232         boundary = mimeinfo->boundary;
 233
 234         if (boundary) {
 235                 boundary_len = strlen(boundary);
 236
 237                 /* look for first boundary */
 238                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 239                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 240                 if (!p) return;
 241         } else if (mimeinfo->parent && mimeinfo->parent->boundary) {
 242                 boundary = mimeinfo->parent->boundary;
 243                 boundary_len = strlen(boundary);
 244         }
 245
 246         if ((fpos = ftell(fp)) < 0) {
 247                 perror("ftell");
 248                 return;
 249         }
 250
 251         for (;;) {
 252                 MimeInfo *partinfo;
 253                 gboolean eom = FALSE;
 254                 gint len;
 255
 256                 prev_fpos = fpos;
 257                 debug_print("prev_fpos: %ld\n", fpos);
 258
 259                 if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 260                         MimeInfo *sub;
 261
 262                         mimeinfo->sub = sub = procmime_scan_mime_header(fp);
 263                         if (!sub) break;
 264
 265                         sub->level = mimeinfo->level + 1;
 266                         sub->parent = mimeinfo->parent;
 267                         sub->main = mimeinfo;
 268
 269                         partinfo = sub;
 270                 } else {
 271                         partinfo = procmime_scan_mime_header(fp);
 272                         if (!partinfo) break;
 273                         procmime_mimeinfo_insert(mimeinfo, partinfo);
 274                         debug_print("content-type: %s\n",
 275                                     partinfo->content_type);
 276                 }
 277
 278                 if (partinfo->mime_type == MIME_MULTIPART ||
 279                     partinfo->mime_type == MIME_MESSAGE_RFC822) {
 280                         if (partinfo->level < 8)
 281                                 procmime_scan_multipart_message(partinfo, fp);
 282                 }
 283
 284                 /* look for next boundary */
 285                 buf[0] = '\0';
 286                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 287                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 288                                 if (buf[2 + boundary_len]     == '-' &&
 289                                     buf[2 + boundary_len + 1] == '-')
 290                                         eom = TRUE;
 291                                 break;
 292                         }
 293                 }
 294                 if (p == NULL) {
 295                         /* broken MIME, or single part MIME message */
 296                         buf[0] = '\0';
 297                         eom = TRUE;
 298                 }
 299                 debug_print("boundary: %s\n", buf);
 300
 301                 fpos = ftell(fp);
 302                 debug_print("fpos: %ld\n", fpos);
 303
 304                 len = strlen(buf);
 305                 partinfo->size = fpos - prev_fpos - len;
 306                 debug_print("partinfo->size: %d\n", partinfo->size);
 307                 if (partinfo->sub && !partinfo->sub->sub &&
 308                     !partinfo->sub->children) {
 309                         partinfo->sub->size =
 310                                 fpos - partinfo->sub->fpos - strlen(buf);
 311                         debug_print("partinfo->sub->size: %d\n",
 312                                     partinfo->sub->size);
 313                 }
 314
 315                 if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 316                         if (len > 0 && fseek(fp, fpos - len, SEEK_SET) < 0)
 317                                 perror("fseek");
 318                         break;
 319                 }
 320
 321                 if (eom) break;
 322         }
 323 }
 324
 325 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 326 {
 327         gchar *buf;
 328
 329         Xstrdup_a(buf, encoding, return);
 330
 331         g_free(mimeinfo->encoding);
 332
 333         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 334         if (!strcasecmp(buf, "7bit"))
 335                 mimeinfo->encoding_type = ENC_7BIT;
 336         else if (!strcasecmp(buf, "8bit"))
 337                 mimeinfo->encoding_type = ENC_8BIT;
 338         else if (!strcasecmp(buf, "quoted-printable"))
 339                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 340         else if (!strcasecmp(buf, "base64"))
 341                 mimeinfo->encoding_type = ENC_BASE64;
 342         else if (!strcasecmp(buf, "x-uuencode"))
 343                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 344         else
 345                 mimeinfo->encoding_type = ENC_UNKNOWN;
 346
 347 }
 348
 349 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 350 {
 351         gchar *delim, *p, *cnttype;
 352         gchar *buf;
 353
 354         if (conv_get_current_charset() == C_EUC_JP &&
 355             strchr(content_type, '\033')) {
 356                 gint len;
 357                 len = strlen(content_type) * 2 + 1;
 358                 Xalloca(buf, len, return);
 359                 conv_jistoeuc(buf, len, content_type);
 360         } else
 361                 Xstrdup_a(buf, content_type, return);
 362
 363         g_free(mimeinfo->content_type);
 364         g_free(mimeinfo->charset);
 365         /* g_free(mimeinfo->name); */
 366         mimeinfo->content_type = NULL;
 367         mimeinfo->charset      = NULL;
 368         /* mimeinfo->name      = NULL; */
 369
 370         if ((delim = strchr(buf, ';'))) *delim = '\0';
 371         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 372
 373         mimeinfo->mime_type = procmime_scan_mime_type(cnttype);
 374
 375         if (!delim) return;
 376         p = delim + 1;
 377
 378         for (;;) {
 379                 gchar *eq;
 380                 gchar *attr, *value;
 381
 382                 if ((delim = strchr(p, ';'))) *delim = '\0';
 383
 384                 if (!(eq = strchr(p, '='))) break;
 385
 386                 *eq = '\0';
 387                 attr = p;
 388                 g_strstrip(attr);
 389                 value = eq + 1;
 390                 g_strstrip(value);
 391
 392                 if (*value == '"')
 393                         extract_quote(value, '"');
 394                 else {
 395                         eliminate_parenthesis(value, '(', ')');
 396                         g_strstrip(value);
 397                 }
 398
 399                 if (*value) {
 400                         if (!strcasecmp(attr, "charset"))
 401                                 mimeinfo->charset = g_strdup(value);
 402                         else if (!strcasecmp(attr, "name")) {
 403                                 gchar *tmp;
 404                                 size_t len;
 405
 406                                 len = strlen(value) + 1;
 407                                 Xalloca(tmp, len, return);
 408                                 conv_unmime_header(tmp, len, value, NULL);
 409                                 g_free(mimeinfo->name);
 410                                 /*pgp signatures should NOT have a name */
 411                                 if (mimeinfo->content_type
 412                                 &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 413                                         mimeinfo->name = g_strdup(tmp);
 414                         } else if (!strcasecmp(attr, "boundary"))
 415                                 mimeinfo->boundary = g_strdup(value);
 416                 }
 417
 418                 if (!delim) break;
 419                 p = delim + 1;
 420         }
 421
 422         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 423                 mimeinfo->mime_type = MIME_TEXT;
 424 }
 425
 426 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 427                                        const gchar *content_disposition)
 428 {
 429         gchar *delim, *p, *dispos;
 430         gchar *buf;
 431
 432         if (conv_get_current_charset() == C_EUC_JP &&
 433             strchr(content_disposition, '\033')) {
 434                 gint len;
 435                 len = strlen(content_disposition) * 2 + 1;
 436                 Xalloca(buf, len, return);
 437                 conv_jistoeuc(buf, len, content_disposition);
 438         } else
 439                 Xstrdup_a(buf, content_disposition, return);
 440
 441         if ((delim = strchr(buf, ';'))) *delim = '\0';
 442         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 443
 444         if (!delim) return;
 445         p = delim + 1;
 446
 447         for (;;) {
 448                 gchar *eq;
 449                 gchar *attr, *value;
 450
 451                 if ((delim = strchr(p, ';'))) *delim = '\0';
 452
 453                 if (!(eq = strchr(p, '='))) break;
 454
 455                 *eq = '\0';
 456                 attr = p;
 457                 g_strstrip(attr);
 458                 value = eq + 1;
 459                 g_strstrip(value);
 460
 461                 if (*value == '"')
 462                         extract_quote(value, '"');
 463                 else {
 464                         eliminate_parenthesis(value, '(', ')');
 465                         g_strstrip(value);
 466                 }
 467
 468                 if (*value) {
 469                         if (!strcasecmp(attr, "filename")) {
 470                                 gchar *tmp;
 471                                 size_t len;
 472
 473                                 len = strlen(value) + 1;
 474                                 Xalloca(tmp, len, return);
 475                                 conv_unmime_header(tmp, len, value, NULL);
 476                                 g_free(mimeinfo->filename);
 477                                 /*pgp signatures should NOT have a name */
 478                                 if (mimeinfo->content_type
 479                                 &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 480                                         mimeinfo->filename = g_strdup(tmp);
 481                                 break;
 482                         }
 483                 }
 484
 485                 if (!delim) break;
 486                 p = delim + 1;
 487         }
 488 }
 489
 490 void procmime_scan_content_description(MimeInfo *mimeinfo,
 491                                        const gchar *content_description)
 492 {
 493         gchar *buf;
 494
 495         gchar *tmp;
 496         size_t blen;
 497
 498         if (conv_get_current_charset() == C_EUC_JP &&
 499             strchr(content_description, '\033')) {
 500                 gint len;
 501                 len = strlen(content_description) * 2 + 1;
 502                 Xalloca(buf, len, return);
 503                 conv_jistoeuc(buf, len, content_description);
 504         } else
 505                 Xstrdup_a(buf, content_description, return);
 506
 507         blen = strlen(buf) + 1;
 508         Xalloca(tmp, blen, return);
 509         conv_unmime_header(tmp, blen, buf, NULL);
 510         /*pgp signatures should NOT have a name */
 511         if (mimeinfo->content_type
 512         &&  strcasecmp(mimeinfo->content_type, "application/pgp-signature"))
 513                 mimeinfo->description = g_strdup(tmp);
 514 }
 515
 516 void procmime_scan_subject(MimeInfo *mimeinfo,
 517                            const gchar *subject)
 518 {
 519         gchar *buf;
 520
 521         gchar *tmp;
 522         size_t blen;
 523
 524         if (conv_get_current_charset() == C_EUC_JP &&
 525             strchr(subject, '\033')) {
 526                 gint len;
 527                 len = strlen(subject) * 2 + 1;
 528                 Xalloca(buf, len, return);
 529                 conv_jistoeuc(buf, len, subject);
 530         } else
 531                 Xstrdup_a(buf, subject, return);
 532
 533         blen = strlen(buf) + 1;
 534         Xalloca(tmp, blen, return);
 535         conv_unmime_header(tmp, blen, buf, NULL);
 536         g_free(mimeinfo->name);
 537         mimeinfo->name = g_strdup(tmp);
 538 }
 539
 540 enum
 541 {
 542         H_CONTENT_TRANSFER_ENCODING = 0,
 543         H_CONTENT_TYPE              = 1,
 544         H_CONTENT_DISPOSITION       = 2,
 545         H_CONTENT_DESCRIPTION       = 3,
 546         H_SUBJECT                   = 4
 547 };
 548
 549 MimeInfo *procmime_scan_mime_header(FILE *fp)
 550 {
 551         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 552                                                           NULL, FALSE},
 553                                        {"Content-Type:", NULL, TRUE},
 554                                        {"Content-Disposition:",
 555                                                           NULL, TRUE},
 556                                        {"Content-description:",
 557                                                           NULL, TRUE},
 558                                        {"Subject:",
 559                                                           NULL, TRUE},
 560                                        {NULL,             NULL, FALSE}};
 561         gchar buf[BUFFSIZE];
 562         gint hnum;
 563         HeaderEntry *hp;
 564         MimeInfo *mimeinfo;
 565
 566         g_return_val_if_fail(fp != NULL, NULL);
 567
 568         mimeinfo = procmime_mimeinfo_new();
 569         mimeinfo->mime_type = MIME_TEXT;
 570         mimeinfo->encoding_type = ENC_7BIT;
 571         mimeinfo->fpos = ftell(fp);
 572
 573         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 574                != -1) {
 575                 hp = hentry + hnum;
 576
 577                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 578                         procmime_scan_encoding
 579                                 (mimeinfo, buf + strlen(hp->name));
 580                 } else if (H_CONTENT_TYPE == hnum) {
 581                         procmime_scan_content_type
 582                                 (mimeinfo, buf + strlen(hp->name));
 583                 } else if (H_CONTENT_DISPOSITION == hnum) {
 584                         procmime_scan_content_disposition
 585                                 (mimeinfo, buf + strlen(hp->name));
 586                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 587                         procmime_scan_content_description
 588                                 (mimeinfo, buf + strlen(hp->name));
 589                 } else if (H_SUBJECT == hnum) {
 590                         procmime_scan_subject
 591                                 (mimeinfo, buf + strlen(hp->name));
 592                 }
 593         }
 594
 595         if (!mimeinfo->content_type)
 596                         mimeinfo->content_type = g_strdup("text/plain");
 597
 598         return mimeinfo;
 599 }
 600
 601 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 602 {
 603         gchar buf[BUFFSIZE];
 604         gchar *boundary = NULL;
 605         gint boundary_len = 0;
 606         gboolean tmp_file = FALSE;
 607
 608         g_return_val_if_fail(infp != NULL, NULL);
 609         g_return_val_if_fail(mimeinfo != NULL, NULL);
 610
 611         if (!outfp) {
 612                 outfp = my_tmpfile();
 613                 if (!outfp) {
 614                         perror("tmpfile");
 615                         return NULL;
 616                 }
 617                 tmp_file = TRUE;
 618         }
 619
 620         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 621                 boundary = mimeinfo->parent->boundary;
 622                 boundary_len = strlen(boundary);
 623         }
 624
 625         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 626                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 627                        (!boundary ||
 628                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 629                         gint len;
 630                         len = qp_decode_line(buf);
 631                         fwrite(buf, len, 1, outfp);
 632                 }
 633         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 634                 gchar outbuf[BUFFSIZE];
 635                 gint len;
 636                 Base64Decoder *decoder;
 637
 638                 decoder = base64_decoder_new();
 639                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 640                        (!boundary ||
 641                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 642                         len = base64_decoder_decode(decoder, buf, outbuf);
 643                         if (len < 0) {
 644                                 g_warning("Bad BASE64 content\n");
 645                                 break;
 646                         }
 647                         fwrite(outbuf, sizeof(gchar), len, outfp);
 648                 }
 649                 base64_decoder_free(decoder);
 650         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 651                 gchar outbuf[BUFFSIZE];
 652                 gint len;
 653                 gboolean flag = FALSE;
 654
 655                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 656                        (!boundary ||
 657                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 658                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 659
 660                         if (flag) {
 661                                 len = fromuutobits(outbuf, buf);
 662                                 if (len <= 0) {
 663                                         if (len < 0)
 664                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 665                                         break;
 666                                 }
 667                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 668                         } else
 669                                 flag = TRUE;
 670                 }
 671         } else {
 672                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 673                        (!boundary ||
 674                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 675                         fputs(buf, outfp);
 676                 }
 677         }
 678
 679         if (tmp_file) rewind(outfp);
 680         return outfp;
 681 }
 682
 683 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 684                        MimeInfo *mimeinfo)
 685 {
 686         FILE *infp, *outfp;
 687         gchar buf[BUFFSIZE];
 688
 689         g_return_val_if_fail(outfile != NULL, -1);
 690         g_return_val_if_fail(infile != NULL, -1);
 691         g_return_val_if_fail(mimeinfo != NULL, -1);
 692
 693         if ((infp = fopen(infile, "rb")) == NULL) {
 694                 FILE_OP_ERROR(infile, "fopen");
 695                 return -1;
 696         }
 697         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 698                 FILE_OP_ERROR(infile, "fseek");
 699                 fclose(infp);
 700                 return -1;
 701         }
 702         if ((outfp = fopen(outfile, "wb")) == NULL) {
 703                 FILE_OP_ERROR(outfile, "fopen");
 704                 fclose(infp);
 705                 return -1;
 706         }
 707
 708         while (fgets(buf, sizeof(buf), infp) != NULL)
 709                 if (buf[0] == '\r' || buf[0] == '\n') break;
 710
 711         procmime_decode_content(outfp, infp, mimeinfo);
 712
 713         fclose(infp);
 714         if (fclose(outfp) == EOF) {
 715                 FILE_OP_ERROR(outfile, "fclose");
 716                 unlink(outfile);
 717                 return -1;
 718         }
 719
 720         return 0;
 721 }
 722
 723 struct ContentRenderer {
 724         char * content_type;
 725         char * renderer;
 726 };
 727
 728 static GList * renderer_list = NULL;
 729
 730 static struct ContentRenderer *
 731 content_renderer_new(char * content_type, char * renderer)
 732 {
 733         struct ContentRenderer * cr;
 734
 735         cr = g_new(struct ContentRenderer, 1);
 736         if (cr == NULL)
 737                 return NULL;
 738
 739         cr->content_type = g_strdup(content_type);
 740         cr->renderer = g_strdup(renderer);
 741
 742         return cr;
 743 }
 744
 745 static void content_renderer_free(struct ContentRenderer * cr)
 746 {
 747         g_free(cr->content_type);
 748         g_free(cr->renderer);
 749         g_free(cr);
 750 }
 751
 752 void renderer_read_config(void)
 753 {
 754         gchar buf[BUFFSIZE];
 755         FILE * f;
 756         gchar * rcpath;
 757
 758         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 759         renderer_list = NULL;
 760
 761         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 762         f = fopen(rcpath, "rb");
 763         g_free(rcpath);
 764
 765         if (f == NULL)
 766                 return;
 767
 768         while (fgets(buf, BUFFSIZE, f)) {
 769                 char * p;
 770                 struct ContentRenderer * cr;
 771
 772                 strretchomp(buf);
 773                 p = strchr(buf, ' ');
 774                 if (p == NULL)
 775                         continue;
 776                 * p = 0;
 777
 778                 cr = content_renderer_new(buf, p + 1);
 779                 if (cr == NULL)
 780                         continue;
 781
 782                 renderer_list = g_list_append(renderer_list, cr);
 783         }
 784
 785         fclose(f);
 786 }
 787
 788 void renderer_write_config(void)
 789 {
 790         gchar * rcpath;
 791         PrefFile *pfile;
 792         GList * cur;
 793
 794         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 795
 796         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 797                 g_warning("failed to write configuration to file\n");
 798                 g_free(rcpath);
 799                 return;
 800         }
 801
 802         g_free(rcpath);
 803
 804         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 805                 struct ContentRenderer * renderer;
 806                 renderer = cur->data;
 807                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 808                         renderer->renderer);
 809         }
 810
 811         if (prefs_file_close(pfile) < 0) {
 812                 g_warning("failed to write configuration to file\n");
 813                 return;
 814         }
 815 }
 816
 817 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 818 {
 819         FILE *tmpfp, *outfp;
 820         gchar *src_codeset;
 821         gboolean conv_fail = FALSE;
 822         gchar buf[BUFFSIZE];
 823         gchar *str;
 824         struct ContentRenderer * renderer;
 825         GList * cur;
 826
 827         g_return_val_if_fail(mimeinfo != NULL, NULL);
 828         g_return_val_if_fail(infp != NULL, NULL);
 829         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 830                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 831                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 832
 833         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 834                 perror("fseek");
 835                 return NULL;
 836         }
 837
 838         while (fgets(buf, sizeof(buf), infp) != NULL)
 839                 if (buf[0] == '\r' || buf[0] == '\n') break;
 840
 841         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 842         if (!tmpfp)
 843                 return NULL;
 844
 845         if ((outfp = my_tmpfile()) == NULL) {
 846                 perror("tmpfile");
 847                 fclose(tmpfp);
 848                 return NULL;
 849         }
 850
 851         src_codeset = prefs_common.force_charset
 852                 ? prefs_common.force_charset : mimeinfo->charset;
 853
 854         renderer = NULL;
 855
 856         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 857                 struct ContentRenderer * cr;
 858                 cr = cur->data;
 859                 if (g_strcasecmp(cr->content_type,
 860                                  mimeinfo->content_type) == 0) {
 861                         renderer = cr;
 862                         break;
 863                 }
 864         }
 865
 866         if (renderer != NULL) {
 867                 FILE * p;
 868                 int oldout;
 869
 870                 oldout = dup(1);
 871
 872                 dup2(fileno(outfp), 1);
 873
 874                 p = popen(renderer->renderer, "w");
 875                 if (p != NULL) {
 876                         size_t count;
 877
 878                         while ((count =
 879                                 fread(buf, sizeof(char), sizeof(buf),
 880                                       tmpfp)) > 0)
 881                                 fwrite(buf, sizeof(char), count, p);
 882                         pclose(p);
 883                 }
 884
 885                 dup2(oldout, 1);
 886         } else if (mimeinfo->mime_type == MIME_TEXT) {
 887                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 888                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 889                         if (str) {
 890                                 fputs(str, outfp);
 891                                 g_free(str);
 892                         } else {
 893                                 conv_fail = TRUE;
 894                                 fputs(buf, outfp);
 895                         }
 896                 }
 897         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 898                 HTMLParser *parser;
 899                 CodeConverter *conv;
 900
 901                 conv = conv_code_converter_new(src_codeset);
 902                 parser = html_parser_new(tmpfp, conv);
 903                 while ((str = html_parse(parser)) != NULL) {
 904                         fputs(str, outfp);
 905                 }
 906                 html_parser_destroy(parser);
 907                 conv_code_converter_destroy(conv);
 908         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 909                 ERTFParser *parser;
 910                 CodeConverter *conv;
 911
 912                 conv = conv_code_converter_new(src_codeset);
 913                 parser = ertf_parser_new(tmpfp, conv);
 914                 while ((str = ertf_parse(parser)) != NULL) {
 915                         fputs(str, outfp);
 916                 }
 917                 ertf_parser_destroy(parser);
 918                 conv_code_converter_destroy(conv);
 919         }
 920
 921         if (conv_fail)
 922                 g_warning("procmime_get_text_content(): Code conversion failed.\n");
 923
 924         fclose(tmpfp);
 925         rewind(outfp);
 926
 927         return outfp;
 928 }
 929
 930 /* search the first text part of (multipart) MIME message,
 931    decode, convert it and output to outfp. */
 932 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 933 {
 934         FILE *infp, *outfp = NULL;
 935         MimeInfo *mimeinfo, *partinfo;
 936
 937         g_return_val_if_fail(msginfo != NULL, NULL);
 938
 939         mimeinfo = procmime_scan_message(msginfo);
 940         if (!mimeinfo) return NULL;
 941
 942         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 943                 procmime_mimeinfo_free_all(mimeinfo);
 944                 return NULL;
 945         }
 946
 947         partinfo = mimeinfo;
 948         while (partinfo && partinfo->mime_type != MIME_TEXT)
 949                 partinfo = procmime_mimeinfo_next(partinfo);
 950         if (!partinfo) {
 951                 partinfo = mimeinfo;
 952                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 953                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 954                         partinfo = procmime_mimeinfo_next(partinfo);
 955         }
 956
 957
 958         if (partinfo)
 959                 outfp = procmime_get_text_content(partinfo, infp);
 960
 961         fclose(infp);
 962         procmime_mimeinfo_free_all(mimeinfo);
 963
 964         return outfp;
 965 }
 966
 967 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 968                                    const gchar *str, gboolean case_sens)
 969 {
 970
 971         FILE *infp, *outfp;
 972         gchar buf[BUFFSIZE];
 973         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 974
 975         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 976         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 977                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 978                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 979         g_return_val_if_fail(str != NULL, FALSE);
 980
 981         if ((infp = fopen(filename, "rb")) == NULL) {
 982                 FILE_OP_ERROR(filename, "fopen");
 983                 return FALSE;
 984         }
 985
 986         outfp = procmime_get_text_content(mimeinfo, infp);
 987         fclose(infp);
 988
 989         if (!outfp)
 990                 return FALSE;
 991
 992         if (case_sens)
 993                 StrFindFunc = strstr;
 994         else
 995                 StrFindFunc = strcasestr;
 996
 997         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 998                 if (StrFindFunc(buf, str) != NULL) {
 999                         fclose(outfp);
1000                         return TRUE;
1001                 }
1002         }
1003
1004         fclose(outfp);
1005
1006         return FALSE;
1007 }
1008
1009 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
1010                               gboolean case_sens)
1011 {
1012         MimeInfo *mimeinfo;
1013         MimeInfo *partinfo;
1014         gchar *filename;
1015         gboolean found = FALSE;
1016
1017         g_return_val_if_fail(msginfo != NULL, FALSE);
1018         g_return_val_if_fail(str != NULL, FALSE);
1019
1020         filename = procmsg_get_message_file(msginfo);
1021         if (!filename) return FALSE;
1022         mimeinfo = procmime_scan_message(msginfo);
1023
1024         for (partinfo = mimeinfo; partinfo != NULL;
1025              partinfo = procmime_mimeinfo_next(partinfo)) {
1026                 if (partinfo->mime_type == MIME_TEXT ||
1027                     partinfo->mime_type == MIME_TEXT_HTML ||
1028                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1029                         if (procmime_find_string_part
1030                                 (partinfo, filename, str, case_sens) == TRUE) {
1031                                 found = TRUE;
1032                                 break;
1033                         }
1034                 }
1035         }
1036
1037         procmime_mimeinfo_free_all(mimeinfo);
1038         g_free(filename);
1039
1040         return found;
1041 }
1042
1043 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1044 {
1045         static guint32 id = 0;
1046         gchar *base;
1047         gchar *filename;
1048         gchar f_prefix[10];
1049
1050         g_return_val_if_fail(mimeinfo != NULL, NULL);
1051
1052         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1053
1054         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1055                 base = "mimetmp.html";
1056         else {
1057                 base = mimeinfo->filename ? mimeinfo->filename
1058                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1059                 base = g_basename(base);
1060                 if (*base == '\0') base = "mimetmp";
1061                 Xstrdup_a(base, base, return NULL);
1062                 subst_for_filename(base);
1063         }
1064
1065         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1066                                f_prefix, base, NULL);
1067
1068         return filename;
1069 }
1070
1071 ContentType procmime_scan_mime_type(const gchar *mime_type)
1072 {
1073         ContentType type;
1074
1075         if (!strncasecmp(mime_type, "text/html", 9))
1076                 type = MIME_TEXT_HTML;
1077         else if (!strncasecmp(mime_type, "text/enriched", 13))
1078                 type = MIME_TEXT_ENRICHED;
1079         else if (!strncasecmp(mime_type, "text/", 5))
1080                 type = MIME_TEXT;
1081         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1082                 type = MIME_MESSAGE_RFC822;
1083         else if (!strncasecmp(mime_type, "message/", 8))
1084                 type = MIME_TEXT;
1085         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1086                 type = MIME_APPLICATION_OCTET_STREAM;
1087         else if (!strncasecmp(mime_type, "application/", 12))
1088                 type = MIME_APPLICATION;
1089         else if (!strncasecmp(mime_type, "multipart/", 10))
1090                 type = MIME_MULTIPART;
1091         else if (!strncasecmp(mime_type, "image/", 6))
1092                 type = MIME_IMAGE;
1093         else if (!strncasecmp(mime_type, "audio/", 6))
1094                 type = MIME_AUDIO;
1095         else if (!strcasecmp(mime_type, "text"))
1096                 type = MIME_TEXT;
1097         else
1098                 type = MIME_UNKNOWN;
1099
1100         return type;
1101 }
1102
1103 static GList *mime_type_list = NULL;
1104
1105 gchar *procmime_get_mime_type(const gchar *filename)
1106 {
1107         static GHashTable *mime_type_table = NULL;
1108         MimeType *mime_type;
1109         const gchar *p;
1110         gchar *ext;
1111
1112         if (!mime_type_table) {
1113                 mime_type_table = procmime_get_mime_type_table();
1114                 if (!mime_type_table) return NULL;
1115         }
1116
1117         filename = g_basename(filename);
1118         p = strrchr(filename, '.');
1119         if (!p) return NULL;
1120
1121         Xstrdup_a(ext, p + 1, return NULL);
1122         g_strdown(ext);
1123         mime_type = g_hash_table_lookup(mime_type_table, ext);
1124         if (mime_type) {
1125                 gchar *str;
1126
1127                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1128                                   NULL);
1129                 return str;
1130         }
1131
1132         return NULL;
1133 }
1134
1135 static guint procmime_str_hash(gconstpointer gptr)
1136 {
1137         guint hash_result = 0;
1138         const char *str;
1139
1140         for (str = gptr; str && *str; str++) {
1141                 if (isupper(*str)) hash_result += (*str + ' ');
1142                 else hash_result += *str;
1143         }
1144
1145         return hash_result;
1146 }
1147
1148 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1149 {
1150         const char *str1 = gptr1;
1151         const char *str2 = gptr2;
1152
1153         return !strcasecmp(str1, str2);
1154 }
1155
1156 static GHashTable *procmime_get_mime_type_table(void)
1157 {
1158         GHashTable *table = NULL;
1159         GList *cur;
1160         MimeType *mime_type;
1161         gchar **exts;
1162
1163         if (!mime_type_list) {
1164                 mime_type_list = procmime_get_mime_type_list();
1165                 if (!mime_type_list) return NULL;
1166         }
1167
1168         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1169
1170         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1171                 gint i;
1172                 gchar *key;
1173
1174                 mime_type = (MimeType *)cur->data;
1175
1176                 if (!mime_type->extension) continue;
1177
1178                 exts = g_strsplit(mime_type->extension, " ", 16);
1179                 for (i = 0; exts[i] != NULL; i++) {
1180                         /* make the key case insensitive */
1181                         g_strdown(exts[i]);
1182                         /* use previously dup'd key on overwriting */
1183                         if (g_hash_table_lookup(table, exts[i]))
1184                                 key = exts[i];
1185                         else
1186                                 key = g_strdup(exts[i]);
1187                         g_hash_table_insert(table, key, mime_type);
1188                 }
1189                 g_strfreev(exts);
1190         }
1191
1192         return table;
1193 }
1194
1195 GList *procmime_get_mime_type_list(void)
1196 {
1197         GList *list = NULL;
1198         FILE *fp;
1199         gchar buf[BUFFSIZE];
1200         gchar *p, *delim;
1201         MimeType *mime_type;
1202
1203         if (mime_type_list)
1204                 return mime_type_list;
1205
1206         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
1207                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
1208                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1209                         return NULL;
1210                 }
1211         }
1212
1213         while (fgets(buf, sizeof(buf), fp) != NULL) {
1214                 p = strchr(buf, '#');
1215                 if (p) *p = '\0';
1216                 g_strstrip(buf);
1217
1218                 p = buf;
1219                 while (*p && !isspace(*p)) p++;
1220                 if (*p) {
1221                         *p = '\0';
1222                         p++;
1223                 }
1224                 delim = strchr(buf, '/');
1225                 if (delim == NULL) continue;
1226                 *delim = '\0';
1227
1228                 mime_type = g_new(MimeType, 1);
1229                 mime_type->type = g_strdup(buf);
1230                 mime_type->sub_type = g_strdup(delim + 1);
1231
1232                 while (*p && isspace(*p)) p++;
1233                 if (*p)
1234                         mime_type->extension = g_strdup(p);
1235                 else
1236                         mime_type->extension = NULL;
1237
1238                 list = g_list_append(list, mime_type);
1239         }
1240
1241         fclose(fp);
1242
1243         if (!list)
1244                 g_warning("Can't read mime.types\n");
1245
1246         return list;
1247 }
1248
1249 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1250 {
1251         if (!charset)
1252                 return ENC_8BIT;
1253         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1254                  !strcasecmp(charset, "US-ASCII"))
1255                 return ENC_7BIT;
1256         else if (!strcasecmp(charset, "ISO-8859-5") ||
1257                  !strncasecmp(charset, "KOI8-", 5) ||
1258                  !strcasecmp(charset, "Windows-1251"))
1259                 return ENC_8BIT;
1260         else if (!strncasecmp(charset, "ISO-8859-", 9))
1261                 return ENC_QUOTED_PRINTABLE;
1262         else
1263                 return ENC_8BIT;
1264 }
1265
1266 EncodingType procmime_get_encoding_for_file(const gchar *file)
1267 {
1268         FILE *fp;
1269         guchar buf[BUFSIZ];
1270         size_t len;
1271
1272         if ((fp = fopen(file, "rb")) == NULL) {
1273                 FILE_OP_ERROR(file, "fopen");
1274                 return ENC_UNKNOWN;
1275         }
1276
1277         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
1278                 guchar *p;
1279                 gint i;
1280
1281                 for (p = buf, i = 0; i < len; p++, i++) {
1282                         if (*p & 0x80) {
1283                                 fclose(fp);
1284                                 return ENC_BASE64;
1285                         }
1286                 }
1287         }
1288
1289         fclose(fp);
1290         return ENC_7BIT;
1291 }
1292
1293 struct EncodingTable
1294 {
1295         gchar *str;
1296         EncodingType enc_type;
1297 };
1298
1299 struct EncodingTable encoding_table[] = {
1300         {"7bit", ENC_7BIT},
1301         {"8bit", ENC_8BIT},
1302         {"binary", ENC_BINARY},
1303         {"quoted-printable", ENC_QUOTED_PRINTABLE},
1304         {"base64", ENC_BASE64},
1305         {"x-uuencode", ENC_UNKNOWN},
1306         {NULL, ENC_UNKNOWN},
1307 };
1308
1309 const gchar *procmime_get_encoding_str(EncodingType encoding)
1310 {
1311         struct EncodingTable *enc_table;
1312
1313         for (enc_table = encoding_table; enc_table->str != NULL; enc_table++) {
1314                 if (enc_table->enc_type == encoding)
1315                         return enc_table->str;
1316         }
1317         return NULL;
1318 }