src/procmime.c

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