src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <locale.h>
  30 #include <ctype.h>
  31
  32 #include "intl.h"
  33 #include "procmime.h"
  34 #include "procheader.h"
  35 #include "base64.h"
  36 #include "uuencode.h"
  37 #include "unmime.h"
  38 #include "html.h"
  39 #include "enriched.h"
  40 #include "codeconv.h"
  41 #include "utils.h"
  42 #include "prefs_common.h"
  43
  44 #if USE_GPGME
  45 #  include "rfc2015.h"
  46 #endif
  47
  48 #include "prefs.h"
  49
  50 static GHashTable *procmime_get_mime_type_table (void);
  51
  52 MimeInfo *procmime_mimeinfo_new(void)
  53 {
  54         MimeInfo *mimeinfo;
  55
  56         mimeinfo = g_new0(MimeInfo, 1);
  57         mimeinfo->mime_type     = MIME_UNKNOWN;
  58         mimeinfo->encoding_type = ENC_UNKNOWN;
  59
  60         return mimeinfo;
  61 }
  62
  63 void procmime_mimeinfo_free(MimeInfo *mimeinfo)
  64 {
  65         if (!mimeinfo) return;
  66
  67         g_free(mimeinfo->encoding);
  68         g_free(mimeinfo->content_type);
  69         g_free(mimeinfo->charset);
  70         g_free(mimeinfo->name);
  71         g_free(mimeinfo->boundary);
  72         g_free(mimeinfo->content_disposition);
  73         g_free(mimeinfo->filename);
  74 #if USE_GPGME
  75         g_free(mimeinfo->plaintextfile);
  76         g_free(mimeinfo->sigstatus);
  77         g_free(mimeinfo->sigstatus_full);
  78 #endif
  79
  80         procmime_mimeinfo_free(mimeinfo->sub);
  81
  82         g_free(mimeinfo);
  83 }
  84
  85 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  86 {
  87         while (mimeinfo != NULL) {
  88                 MimeInfo *next;
  89
  90                 g_free(mimeinfo->encoding);
  91                 g_free(mimeinfo->content_type);
  92                 g_free(mimeinfo->charset);
  93                 g_free(mimeinfo->name);
  94                 g_free(mimeinfo->boundary);
  95                 g_free(mimeinfo->content_disposition);
  96                 g_free(mimeinfo->filename);
  97 #if USE_GPGME
  98                 g_free(mimeinfo->plaintextfile);
  99                 g_free(mimeinfo->sigstatus);
 100                 g_free(mimeinfo->sigstatus_full);
 101 #endif
 102
 103                 procmime_mimeinfo_free_all(mimeinfo->sub);
 104                 procmime_mimeinfo_free_all(mimeinfo->children);
 105 #if USE_GPGME
 106                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
 107 #endif
 108
 109                 next = mimeinfo->next;
 110                 g_free(mimeinfo);
 111                 mimeinfo = next;
 112         }
 113 }
 114
 115 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 116 {
 117         MimeInfo *child = parent->children;
 118
 119         if (!child)
 120                 parent->children = mimeinfo;
 121         else {
 122                 while (child->next != NULL)
 123                         child = child->next;
 124
 125                 child->next = mimeinfo;
 126         }
 127
 128         mimeinfo->parent = parent;
 129         mimeinfo->level = parent->level + 1;
 130
 131         return mimeinfo;
 132 }
 133
 134 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 135 {
 136         MimeInfo *parent = old->parent;
 137         MimeInfo *child;
 138
 139         g_return_if_fail(parent != NULL);
 140         g_return_if_fail(new->next == NULL);
 141
 142         for (child = parent->children; child && child != old;
 143              child = child->next)
 144                 ;
 145         if (!child) {
 146                 g_warning("oops: parent can't find it's own child");
 147                 return;
 148         }
 149         procmime_mimeinfo_free_all(old);
 150
 151         if (child == parent->children) {
 152                 new->next = parent->children->next;
 153                 parent->children = new;
 154         } else {
 155                 new->next = child->next;
 156                 child = new;
 157         }
 158 }
 159
 160 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 161 {
 162         if (!mimeinfo) return NULL;
 163
 164         if (mimeinfo->children)
 165                 return mimeinfo->children;
 166         if (mimeinfo->sub)
 167                 return mimeinfo->sub;
 168         if (mimeinfo->next)
 169                 return mimeinfo->next;
 170
 171         for (mimeinfo = mimeinfo->parent; mimeinfo != NULL;
 172              mimeinfo = mimeinfo->parent) {
 173                 if (mimeinfo->next)
 174                         return mimeinfo->next;
 175                 if (mimeinfo->main) {
 176                         mimeinfo = mimeinfo->main;
 177                         if (mimeinfo->next)
 178                                 return mimeinfo->next;
 179                 }
 180         }
 181
 182         return NULL;
 183 }
 184
 185 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 186 {
 187         FILE *fp;
 188         MimeInfo *mimeinfo;
 189
 190         g_return_val_if_fail(msginfo != NULL, NULL);
 191
 192         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 193         mimeinfo = procmime_scan_mime_header(fp);
 194
 195         if (mimeinfo) {
 196                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 197                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 198                                 perror("fseek");
 199                 }
 200                 if (mimeinfo->mime_type != MIME_TEXT)
 201                         procmime_scan_multipart_message(mimeinfo, fp);
 202         }
 203
 204 #if USE_GPGME
 205         if (prefs_common.auto_check_signatures)
 206                 rfc2015_check_signature(mimeinfo, fp);
 207 #endif
 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         gint npart;
 221
 222         g_return_if_fail(mimeinfo != NULL);
 223         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 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         }
 241
 242         if ((fpos = ftell(fp)) < 0) {
 243                 perror("ftell");
 244                 return;
 245         }
 246
 247
 248         for (npart = 0;; npart++) {
 249                 MimeInfo *partinfo;
 250                 gboolean eom = FALSE;
 251
 252                 prev_fpos = fpos;
 253
 254                 partinfo = procmime_scan_mime_header(fp);
 255                 if (!partinfo) break;
 256                 procmime_mimeinfo_insert(mimeinfo, partinfo);
 257
 258                 if (partinfo->mime_type == MIME_MULTIPART) {
 259                         if (partinfo->level < 8)
 260                                 procmime_scan_multipart_message(partinfo, fp);
 261                 } else if (partinfo->mime_type == MIME_MESSAGE_RFC822) {
 262                         MimeInfo *sub;
 263
 264                         partinfo->sub = sub = procmime_scan_mime_header(fp);
 265                         if (!sub) break;
 266                         sub->level = partinfo->level + 1;
 267                         sub->parent = partinfo->parent;
 268                         sub->main = partinfo;
 269
 270                         if (sub->mime_type == MIME_MULTIPART) {
 271                                 if (sub->level < 8)
 272                                         procmime_scan_multipart_message
 273                                                 (sub, fp);
 274                         }
 275                 }
 276
 277                 /* look for next boundary */
 278                 buf[0] = '\0';
 279                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 280                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 281                                 if (buf[2 + boundary_len]     == '-' &&
 282                                     buf[2 + boundary_len + 1] == '-')
 283                                         eom = TRUE;
 284                                 break;
 285                         }
 286                 }
 287                 if (p == NULL)
 288                         eom = TRUE;     /* broken MIME message */
 289                 fpos = ftell(fp);
 290
 291                 partinfo->size = fpos - prev_fpos - strlen(buf);
 292
 293                 if (eom) break;
 294         }
 295 }
 296
 297 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 298 {
 299         gchar *buf;
 300
 301         Xstrdup_a(buf, encoding, return);
 302
 303         g_free(mimeinfo->encoding);
 304
 305         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 306         if (!strcasecmp(buf, "7bit"))
 307                 mimeinfo->encoding_type = ENC_7BIT;
 308         else if (!strcasecmp(buf, "8bit"))
 309                 mimeinfo->encoding_type = ENC_8BIT;
 310         else if (!strcasecmp(buf, "quoted-printable"))
 311                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 312         else if (!strcasecmp(buf, "base64"))
 313                 mimeinfo->encoding_type = ENC_BASE64;
 314         else if (!strcasecmp(buf, "x-uuencode"))
 315                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 316         else
 317                 mimeinfo->encoding_type = ENC_UNKNOWN;
 318
 319 }
 320
 321 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 322 {
 323         gchar *delim, *p, *cnttype;
 324         gchar *buf;
 325
 326         if (conv_get_current_charset() == C_EUC_JP &&
 327             strchr(content_type, '\033')) {
 328                 gint len;
 329                 len = strlen(content_type) * 2 + 1;
 330                 Xalloca(buf, len, return);
 331                 conv_jistoeuc(buf, len, content_type);
 332         } else
 333                 Xstrdup_a(buf, content_type, return);
 334
 335         g_free(mimeinfo->content_type);
 336         g_free(mimeinfo->charset);
 337         /* g_free(mimeinfo->name); */
 338         mimeinfo->content_type = NULL;
 339         mimeinfo->charset      = NULL;
 340         /* mimeinfo->name      = NULL; */
 341
 342         if ((delim = strchr(buf, ';'))) *delim = '\0';
 343         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 344
 345         mimeinfo->mime_type = procmime_scan_mime_type(cnttype);
 346
 347         if (!delim) return;
 348         p = delim + 1;
 349
 350         for (;;) {
 351                 gchar *eq;
 352                 gchar *attr, *value;
 353
 354                 if ((delim = strchr(p, ';'))) *delim = '\0';
 355
 356                 if (!(eq = strchr(p, '='))) break;
 357
 358                 *eq = '\0';
 359                 attr = p;
 360                 g_strstrip(attr);
 361                 value = eq + 1;
 362                 g_strstrip(value);
 363
 364                 if (*value == '"')
 365                         extract_quote(value, '"');
 366                 else {
 367                         eliminate_parenthesis(value, '(', ')');
 368                         g_strstrip(value);
 369                 }
 370
 371                 if (*value) {
 372                         if (!strcasecmp(attr, "charset"))
 373                                 mimeinfo->charset = g_strdup(value);
 374                         else if (!strcasecmp(attr, "name")) {
 375                                 gchar *tmp;
 376                                 size_t len;
 377
 378                                 len = strlen(value) + 1;
 379                                 Xalloca(tmp, len, return);
 380                                 conv_unmime_header(tmp, len, value, NULL);
 381                                 g_free(mimeinfo->name);
 382                                 mimeinfo->name = g_strdup(tmp);
 383                         } else if (!strcasecmp(attr, "boundary"))
 384                                 mimeinfo->boundary = g_strdup(value);
 385                 }
 386
 387                 if (!delim) break;
 388                 p = delim + 1;
 389         }
 390
 391         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 392                 mimeinfo->mime_type = MIME_TEXT;
 393 }
 394
 395 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 396                                        const gchar *content_disposition)
 397 {
 398         gchar *delim, *p, *dispos;
 399         gchar *buf;
 400
 401         if (conv_get_current_charset() == C_EUC_JP &&
 402             strchr(content_disposition, '\033')) {
 403                 gint len;
 404                 len = strlen(content_disposition) * 2 + 1;
 405                 Xalloca(buf, len, return);
 406                 conv_jistoeuc(buf, len, content_disposition);
 407         } else
 408                 Xstrdup_a(buf, content_disposition, return);
 409
 410         if ((delim = strchr(buf, ';'))) *delim = '\0';
 411         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 412
 413         if (!delim) return;
 414         p = delim + 1;
 415
 416         for (;;) {
 417                 gchar *eq;
 418                 gchar *attr, *value;
 419
 420                 if ((delim = strchr(p, ';'))) *delim = '\0';
 421
 422                 if (!(eq = strchr(p, '='))) break;
 423
 424                 *eq = '\0';
 425                 attr = p;
 426                 g_strstrip(attr);
 427                 value = eq + 1;
 428                 g_strstrip(value);
 429
 430                 if (*value == '"')
 431                         extract_quote(value, '"');
 432                 else {
 433                         eliminate_parenthesis(value, '(', ')');
 434                         g_strstrip(value);
 435                 }
 436
 437                 if (*value) {
 438                         if (!strcasecmp(attr, "filename")) {
 439                                 gchar *tmp;
 440                                 size_t len;
 441
 442                                 len = strlen(value) + 1;
 443                                 Xalloca(tmp, len, return);
 444                                 conv_unmime_header(tmp, len, value, NULL);
 445                                 g_free(mimeinfo->filename);
 446                                 mimeinfo->filename = g_strdup(tmp);
 447                                 break;
 448                         }
 449                 }
 450
 451                 if (!delim) break;
 452                 p = delim + 1;
 453         }
 454 }
 455
 456 void procmime_scan_content_description(MimeInfo *mimeinfo,
 457                                        const gchar *content_description)
 458 {
 459         gchar *delim, *p, *dispos;
 460         gchar *buf;
 461
 462         gchar *tmp;
 463         size_t blen;
 464
 465         if (conv_get_current_charset() == C_EUC_JP &&
 466             strchr(content_description, '\033')) {
 467                 gint len;
 468                 len = strlen(content_description) * 2 + 1;
 469                 Xalloca(buf, len, return);
 470                 conv_jistoeuc(buf, len, content_description);
 471         } else
 472                 Xstrdup_a(buf, content_description, return);
 473
 474         blen = strlen(buf) + 1;
 475         Xalloca(tmp, blen, return);
 476         conv_unmime_header(tmp, blen, buf, NULL);
 477         g_free(mimeinfo->name);
 478         mimeinfo->name = g_strdup(tmp);
 479 }
 480
 481 void procmime_scan_subject(MimeInfo *mimeinfo,
 482                            const gchar *subject)
 483 {
 484         gchar *delim, *p, *dispos;
 485         gchar *buf;
 486
 487         gchar *tmp;
 488         size_t blen;
 489
 490         if (conv_get_current_charset() == C_EUC_JP &&
 491             strchr(subject, '\033')) {
 492                 gint len;
 493                 len = strlen(subject) * 2 + 1;
 494                 Xalloca(buf, len, return);
 495                 conv_jistoeuc(buf, len, subject);
 496         } else
 497                 Xstrdup_a(buf, subject, return);
 498
 499         blen = strlen(buf) + 1;
 500         Xalloca(tmp, blen, return);
 501         conv_unmime_header(tmp, blen, buf, NULL);
 502         g_free(mimeinfo->name);
 503         mimeinfo->name = g_strdup(tmp);
 504 }
 505
 506 enum
 507 {
 508         H_CONTENT_TRANSFER_ENCODING = 0,
 509         H_CONTENT_TYPE              = 1,
 510         H_CONTENT_DISPOSITION       = 2,
 511         H_CONTENT_DESCRIPTION       = 3,
 512         H_SUBJECT                   = 4
 513 };
 514
 515 MimeInfo *procmime_scan_mime_header(FILE *fp)
 516 {
 517         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 518                                                           NULL, FALSE},
 519                                        {"Content-Type:", NULL, TRUE},
 520                                        {"Content-Disposition:",
 521                                                           NULL, TRUE},
 522                                        {"Content-description:",
 523                                                           NULL, TRUE},
 524                                        {"Subject:",
 525                                                           NULL, TRUE},
 526                                        {NULL,             NULL, FALSE}};
 527         gchar buf[BUFFSIZE];
 528         gint hnum;
 529         HeaderEntry *hp;
 530         MimeInfo *mimeinfo;
 531
 532         g_return_val_if_fail(fp != NULL, NULL);
 533
 534         mimeinfo = procmime_mimeinfo_new();
 535         mimeinfo->mime_type = MIME_TEXT;
 536         mimeinfo->encoding_type = ENC_7BIT;
 537         mimeinfo->fpos = ftell(fp);
 538
 539         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 540                != -1) {
 541                 hp = hentry + hnum;
 542
 543                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 544                         procmime_scan_encoding
 545                                 (mimeinfo, buf + strlen(hp->name));
 546                 } else if (H_CONTENT_TYPE == hnum) {
 547                         procmime_scan_content_type
 548                                 (mimeinfo, buf + strlen(hp->name));
 549                 } else if (H_CONTENT_DISPOSITION == hnum) {
 550                         procmime_scan_content_disposition
 551                                 (mimeinfo, buf + strlen(hp->name));
 552                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 553                         procmime_scan_content_description
 554                                 (mimeinfo, buf + strlen(hp->name));
 555                 } else if (H_SUBJECT == hnum) {
 556                         procmime_scan_subject
 557                                 (mimeinfo, buf + strlen(hp->name));
 558                 }
 559         }
 560
 561         if (mimeinfo->mime_type == MIME_APPLICATION_OCTET_STREAM &&
 562             mimeinfo->name) {
 563                 const gchar *type;
 564                 type = procmime_get_mime_type(mimeinfo->name);
 565                 if (type)
 566                         mimeinfo->mime_type = procmime_scan_mime_type(type);
 567         }
 568
 569         if (!mimeinfo->content_type)
 570                         mimeinfo->content_type = g_strdup("text/plain");
 571
 572         return mimeinfo;
 573 }
 574
 575 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 576 {
 577         gchar buf[BUFFSIZE];
 578         gchar *boundary = NULL;
 579         gint boundary_len = 0;
 580         gboolean tmp_file = FALSE;
 581
 582         g_return_val_if_fail(infp != NULL, NULL);
 583         g_return_val_if_fail(mimeinfo != NULL, NULL);
 584
 585         if (!outfp) {
 586                 outfp = my_tmpfile();
 587                 if (!outfp) {
 588                         perror("tmpfile");
 589                         return NULL;
 590                 }
 591                 tmp_file = TRUE;
 592         }
 593
 594         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 595                 boundary = mimeinfo->parent->boundary;
 596                 boundary_len = strlen(boundary);
 597         }
 598
 599         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 600                 gboolean softline = FALSE;
 601
 602                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 603                        (!boundary ||
 604                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 605                         guchar *p = buf;
 606
 607                         softline = DoOneQPLine(&p, FALSE, softline);
 608                         fwrite(buf, p - (guchar *)buf, 1, outfp);
 609                 }
 610         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 611                 gchar outbuf[BUFFSIZE];
 612                 gint len;
 613                 Base64Decoder *decoder;
 614
 615                 decoder = base64_decoder_new();
 616                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 617                        (!boundary ||
 618                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 619                         len = base64_decoder_decode(decoder, buf, outbuf);
 620                         if (len < 0) {
 621                                 g_warning("Bad BASE64 content\n");
 622                                 break;
 623                         }
 624                         fwrite(outbuf, sizeof(gchar), len, outfp);
 625                 }
 626                 base64_decoder_free(decoder);
 627         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 628                 gchar outbuf[BUFFSIZE];
 629                 gint len;
 630                 gboolean flag = FALSE;
 631
 632                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 633                        (!boundary ||
 634                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 635                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 636
 637                         if (flag) {
 638                                 len = fromuutobits(outbuf, buf);
 639                                 if (len <= 0) {
 640                                         if (len < 0)
 641                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 642                                         break;
 643                                 }
 644                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 645                         } else
 646                                 flag = TRUE;
 647                 }
 648         } else {
 649                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 650                        (!boundary ||
 651                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 652                         fputs(buf, outfp);
 653                 }
 654         }
 655
 656         if (tmp_file) rewind(outfp);
 657         return outfp;
 658 }
 659
 660 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 661                        MimeInfo *mimeinfo)
 662 {
 663         FILE *infp, *outfp;
 664         gchar buf[BUFFSIZE];
 665
 666         g_return_val_if_fail(outfile != NULL, -1);
 667         g_return_val_if_fail(infile != NULL, -1);
 668         g_return_val_if_fail(mimeinfo != NULL, -1);
 669
 670         if ((infp = fopen(infile, "r")) == NULL) {
 671                 FILE_OP_ERROR(infile, "fopen");
 672                 return -1;
 673         }
 674         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 675                 FILE_OP_ERROR(infile, "fseek");
 676                 fclose(infp);
 677                 return -1;
 678         }
 679         if ((outfp = fopen(outfile, "w")) == NULL) {
 680                 FILE_OP_ERROR(outfile, "fopen");
 681                 fclose(infp);
 682                 return -1;
 683         }
 684
 685         while (fgets(buf, sizeof(buf), infp) != NULL)
 686                 if (buf[0] == '\r' || buf[0] == '\n') break;
 687
 688         procmime_decode_content(outfp, infp, mimeinfo);
 689
 690         fclose(infp);
 691         if (fclose(outfp) == EOF) {
 692                 FILE_OP_ERROR(outfile, "fclose");
 693                 unlink(outfile);
 694                 return -1;
 695         }
 696
 697         return 0;
 698 }
 699
 700 struct ContentRenderer {
 701         char * content_type;
 702         char * renderer;
 703 };
 704
 705 static GList * renderer_list = NULL;
 706
 707 static struct ContentRenderer *
 708 content_renderer_new(char * content_type, char * renderer)
 709 {
 710         struct ContentRenderer * cr;
 711
 712         cr = g_new(struct ContentRenderer, 1);
 713         if (cr == NULL)
 714                 return NULL;
 715
 716         cr->content_type = g_strdup(content_type);
 717         cr->renderer = g_strdup(renderer);
 718
 719         return cr;
 720 }
 721
 722 static void content_renderer_free(struct ContentRenderer * cr)
 723 {
 724         g_free(cr->content_type);
 725         g_free(cr->renderer);
 726         g_free(cr);
 727 }
 728
 729 void renderer_read_config(void)
 730 {
 731         gchar buf[BUFFSIZE];
 732         FILE * f;
 733         gchar * rcpath;
 734
 735         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 736         renderer_list = NULL;
 737
 738         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 739         f = fopen(rcpath, "r");
 740         g_free(rcpath);
 741
 742         if (f == NULL)
 743                 return;
 744
 745         while (fgets(buf, BUFFSIZE, f)) {
 746                 char * p;
 747                 struct ContentRenderer * cr;
 748
 749                 strretchomp(buf);
 750                 p = strchr(buf, ' ');
 751                 if (p == NULL)
 752                         continue;
 753                 * p = 0;
 754
 755                 cr = content_renderer_new(buf, p + 1);
 756                 if (cr == NULL)
 757                         continue;
 758
 759                 printf("%s %s\n", cr->content_type, cr->renderer);
 760
 761                 renderer_list = g_list_append(renderer_list, cr);
 762         }
 763
 764         fclose(f);
 765 }
 766
 767 void renderer_write_config(void)
 768 {
 769         int i;
 770         gchar * rcpath;
 771         PrefFile *pfile;
 772         GList * cur;
 773
 774         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 775
 776         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 777                 g_warning(_("failed to write configuration to file\n"));
 778                 g_free(rcpath);
 779                 return;
 780         }
 781
 782         g_free(rcpath);
 783
 784         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 785                 struct ContentRenderer * renderer;
 786                 renderer = cur->data;
 787                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 788                         renderer->renderer);
 789         }
 790
 791         if (prefs_write_close(pfile) < 0) {
 792                 g_warning(_("failed to write configuration to file\n"));
 793                 return;
 794         }
 795 }
 796
 797 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 798 {
 799         FILE *tmpfp, *outfp;
 800         gchar *src_codeset;
 801         gboolean conv_fail = FALSE;
 802         gchar buf[BUFFSIZE];
 803         gchar *str;
 804         int i;
 805         struct ContentRenderer * renderer;
 806         GList * cur;
 807
 808         g_return_val_if_fail(mimeinfo != NULL, NULL);
 809         g_return_val_if_fail(infp != NULL, NULL);
 810         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 811                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 812                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 813
 814         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 815                 perror("fseek");
 816                 return NULL;
 817         }
 818
 819         while (fgets(buf, sizeof(buf), infp) != NULL)
 820                 if (buf[0] == '\r' || buf[0] == '\n') break;
 821
 822         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 823         if (!tmpfp)
 824                 return NULL;
 825
 826         if ((outfp = my_tmpfile()) == NULL) {
 827                 perror("tmpfile");
 828                 fclose(tmpfp);
 829                 return NULL;
 830         }
 831
 832         src_codeset = prefs_common.force_charset
 833                 ? prefs_common.force_charset : mimeinfo->charset;
 834
 835         renderer = NULL;
 836
 837         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 838                 struct ContentRenderer * cr;
 839                 cr = cur->data;
 840                 if (g_strcasecmp(cr->content_type,
 841                                  mimeinfo->content_type) == 0) {
 842                         renderer = cr;
 843                         break;
 844                 }
 845         }
 846
 847         if (renderer != NULL) {
 848                 FILE * p;
 849                 int oldout;
 850
 851                 oldout = dup(1);
 852
 853                 dup2(fileno(outfp), 1);
 854
 855                 p = popen(renderer->renderer, "w");
 856                 if (p != NULL) {
 857                         size_t count;
 858
 859                         while ((count =
 860                                 fread(buf, sizeof(char), sizeof(buf),
 861                                       tmpfp)) > 0)
 862                                 fwrite(buf, sizeof(char), count, p);
 863                         pclose(p);
 864                 }
 865
 866                 dup2(oldout, 1);
 867         } else if (mimeinfo->mime_type == MIME_TEXT) {
 868                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 869                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 870                         if (str) {
 871                                 fputs(str, outfp);
 872                                 g_free(str);
 873                         } else {
 874                                 conv_fail = TRUE;
 875                                 fputs(buf, outfp);
 876                         }
 877                 }
 878         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 879                 HTMLParser *parser;
 880                 CodeConverter *conv;
 881
 882                 conv = conv_code_converter_new(src_codeset);
 883                 parser = html_parser_new(tmpfp, conv);
 884                 while ((str = html_parse(parser)) != NULL) {
 885                         fputs(str, outfp);
 886                 }
 887                 html_parser_destroy(parser);
 888                 conv_code_converter_destroy(conv);
 889         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 890                 ERTFParser *parser;
 891                 CodeConverter *conv;
 892
 893                 conv = conv_code_converter_new(src_codeset);
 894                 parser = ertf_parser_new(tmpfp, conv);
 895                 while ((str = ertf_parse(parser)) != NULL) {
 896                         fputs(str, outfp);
 897                 }
 898                 ertf_parser_destroy(parser);
 899                 conv_code_converter_destroy(conv);
 900         }
 901
 902         if (conv_fail)
 903                 g_warning(_("procmime_get_text_content(): Code conversion failed.\n"));
 904
 905         fclose(tmpfp);
 906         rewind(outfp);
 907
 908         return outfp;
 909 }
 910
 911 /* search the first text part of (multipart) MIME message,
 912    decode, convert it and output to outfp. */
 913 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 914 {
 915         FILE *infp, *outfp = NULL;
 916         MimeInfo *mimeinfo, *partinfo;
 917
 918         g_return_val_if_fail(msginfo != NULL, NULL);
 919
 920         mimeinfo = procmime_scan_message(msginfo);
 921         if (!mimeinfo) return NULL;
 922
 923         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 924                 procmime_mimeinfo_free_all(mimeinfo);
 925                 return NULL;
 926         }
 927
 928         partinfo = mimeinfo;
 929         while (partinfo && partinfo->mime_type != MIME_TEXT)
 930                 partinfo = procmime_mimeinfo_next(partinfo);
 931         if (!partinfo) {
 932                 partinfo = mimeinfo;
 933                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 934                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 935                         partinfo = procmime_mimeinfo_next(partinfo);
 936         }
 937
 938
 939         if (partinfo)
 940                 outfp = procmime_get_text_content(partinfo, infp);
 941
 942         fclose(infp);
 943         procmime_mimeinfo_free_all(mimeinfo);
 944
 945         return outfp;
 946 }
 947
 948 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 949                                    const gchar *str, gboolean case_sens)
 950 {
 951
 952         FILE *infp, *outfp;
 953         gchar buf[BUFFSIZE];
 954         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 955
 956         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 957         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 958                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 959                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 960         g_return_val_if_fail(str != NULL, FALSE);
 961
 962         if ((infp = fopen(filename, "r")) == NULL) {
 963                 FILE_OP_ERROR(filename, "fopen");
 964                 return FALSE;
 965         }
 966
 967         outfp = procmime_get_text_content(mimeinfo, infp);
 968         fclose(infp);
 969
 970         if (!outfp)
 971                 return FALSE;
 972
 973         if (case_sens)
 974                 StrFindFunc = strstr;
 975         else
 976                 StrFindFunc = strcasestr;
 977
 978         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 979                 if (StrFindFunc(buf, str) != NULL) {
 980                         fclose(outfp);
 981                         return TRUE;
 982                 }
 983         }
 984
 985         fclose(outfp);
 986
 987         return FALSE;
 988 }
 989
 990 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
 991                               gboolean case_sens)
 992 {
 993         MimeInfo *mimeinfo;
 994         MimeInfo *partinfo;
 995         gchar *filename;
 996         gboolean found = FALSE;
 997
 998         g_return_val_if_fail(msginfo != NULL, FALSE);
 999         g_return_val_if_fail(str != NULL, FALSE);
1000
1001         filename = procmsg_get_message_file(msginfo);
1002         if (!filename) return FALSE;
1003         mimeinfo = procmime_scan_message(msginfo);
1004
1005         for (partinfo = mimeinfo; partinfo != NULL;
1006              partinfo = procmime_mimeinfo_next(partinfo)) {
1007                 if (partinfo->mime_type == MIME_TEXT ||
1008                     partinfo->mime_type == MIME_TEXT_HTML ||
1009                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1010                         if (procmime_find_string_part
1011                                 (partinfo, filename, str, case_sens) == TRUE) {
1012                                 found = TRUE;
1013                                 break;
1014                         }
1015                 }
1016         }
1017
1018         procmime_mimeinfo_free_all(mimeinfo);
1019         g_free(filename);
1020
1021         return found;
1022 }
1023
1024 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1025 {
1026         static guint32 id = 0;
1027         gchar *base;
1028         gchar *filename;
1029         gchar f_prefix[10];
1030
1031         g_return_val_if_fail(mimeinfo != NULL, NULL);
1032
1033         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1034
1035         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1036                 base = "mimetmp.html";
1037         else {
1038                 base = mimeinfo->filename ? mimeinfo->filename
1039                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1040                 base = g_basename(base);
1041                 if (*base == '\0') base = "mimetmp";
1042         }
1043
1044         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1045                                f_prefix, base, NULL);
1046
1047         return filename;
1048 }
1049
1050 ContentType procmime_scan_mime_type(const gchar *mime_type)
1051 {
1052         ContentType type;
1053
1054         if (!strncasecmp(mime_type, "text/html", 9))
1055                 type = MIME_TEXT_HTML;
1056         else if (!strncasecmp(mime_type, "text/enriched", 13))
1057                 type = MIME_TEXT_ENRICHED;
1058         else if (!strncasecmp(mime_type, "text/", 5))
1059                 type = MIME_TEXT;
1060         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1061                 type = MIME_MESSAGE_RFC822;
1062         else if (!strncasecmp(mime_type, "message/", 8))
1063                 type = MIME_TEXT;
1064         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1065                 type = MIME_APPLICATION_OCTET_STREAM;
1066         else if (!strncasecmp(mime_type, "application/", 12))
1067                 type = MIME_APPLICATION;
1068         else if (!strncasecmp(mime_type, "multipart/", 10))
1069                 type = MIME_MULTIPART;
1070         else if (!strncasecmp(mime_type, "image/", 6))
1071                 type = MIME_IMAGE;
1072         else if (!strncasecmp(mime_type, "audio/", 6))
1073                 type = MIME_AUDIO;
1074         else if (!strcasecmp(mime_type, "text"))
1075                 type = MIME_TEXT;
1076         else
1077                 type = MIME_UNKNOWN;
1078
1079         return type;
1080 }
1081
1082 static GList *mime_type_list = NULL;
1083
1084 gchar *procmime_get_mime_type(const gchar *filename)
1085 {
1086         static GHashTable *mime_type_table = NULL;
1087         MimeType *mime_type;
1088         const gchar *p;
1089         gchar *ext;
1090
1091         if (!mime_type_table) {
1092                 mime_type_table = procmime_get_mime_type_table();
1093                 if (!mime_type_table) return NULL;
1094         }
1095
1096         filename = g_basename(filename);
1097         p = strrchr(filename, '.');
1098         if (!p) return NULL;
1099
1100         Xstrdup_a(ext, p + 1, return NULL);
1101         g_strdown(ext);
1102         mime_type = g_hash_table_lookup(mime_type_table, ext);
1103         if (mime_type) {
1104                 gchar *str;
1105
1106                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1107                                   NULL);
1108                 return str;
1109         }
1110
1111         return NULL;
1112 }
1113
1114 static guint procmime_str_hash(gconstpointer gptr)
1115 {
1116         guint hash_result = 0;
1117         const char *str;
1118
1119         for (str = gptr; str && *str; str++) {
1120                 if (isupper(*str)) hash_result += (*str + ' ');
1121                 else hash_result += *str;
1122         }
1123
1124         return hash_result;
1125 }
1126
1127 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1128 {
1129         const char *str1 = gptr1;
1130         const char *str2 = gptr2;
1131
1132         return !strcasecmp(str1, str2);
1133 }
1134
1135 static GHashTable *procmime_get_mime_type_table(void)
1136 {
1137         GHashTable *table = NULL;
1138         GList *cur;
1139         MimeType *mime_type;
1140         gchar **exts;
1141
1142         if (!mime_type_list) {
1143                 mime_type_list = procmime_get_mime_type_list();
1144                 if (!mime_type_list) return NULL;
1145         }
1146
1147         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1148
1149         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1150                 gint i;
1151                 gchar *key;
1152
1153                 mime_type = (MimeType *)cur->data;
1154
1155                 if (!mime_type->extension) continue;
1156
1157                 exts = g_strsplit(mime_type->extension, " ", 16);
1158                 for (i = 0; exts[i] != NULL; i++) {
1159                         /* make the key case insensitive */
1160                         g_strdown(exts[i]);
1161                         /* use previously dup'd key on overwriting */
1162                         if (g_hash_table_lookup(table, exts[i]))
1163                                 key = exts[i];
1164                         else
1165                                 key = g_strdup(exts[i]);
1166                         g_hash_table_insert(table, key, mime_type);
1167                 }
1168                 g_strfreev(exts);
1169         }
1170
1171         return table;
1172 }
1173
1174 GList *procmime_get_mime_type_list(void)
1175 {
1176         GList *list = NULL;
1177         FILE *fp;
1178         gchar buf[BUFFSIZE];
1179         gchar *p, *delim;
1180         MimeType *mime_type;
1181
1182         if (mime_type_list)
1183                 return mime_type_list;
1184
1185         if ((fp = fopen("/etc/mime.types", "r")) == NULL) {
1186                 if ((fp = fopen(SYSCONFDIR "/mime.types", "r")) == NULL) {
1187                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1188                         return NULL;
1189                 }
1190         }
1191
1192         while (fgets(buf, sizeof(buf), fp) != NULL) {
1193                 p = strchr(buf, '#');
1194                 if (p) *p = '\0';
1195                 g_strstrip(buf);
1196
1197                 p = buf;
1198                 while (*p && !isspace(*p)) p++;
1199                 if (*p) {
1200                         *p = '\0';
1201                         p++;
1202                 }
1203                 delim = strchr(buf, '/');
1204                 if (delim == NULL) continue;
1205                 *delim = '\0';
1206
1207                 mime_type = g_new(MimeType, 1);
1208                 mime_type->type = g_strdup(buf);
1209                 mime_type->sub_type = g_strdup(delim + 1);
1210
1211                 while (*p && isspace(*p)) p++;
1212                 if (*p)
1213                         mime_type->extension = g_strdup(p);
1214                 else
1215                         mime_type->extension = NULL;
1216
1217                 list = g_list_append(list, mime_type);
1218         }
1219
1220         fclose(fp);
1221
1222         if (!list)
1223                 g_warning("Can't read mime.types\n");
1224
1225         return list;
1226 }
1227
1228 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1229 {
1230         if (!charset)
1231                 return ENC_8BIT;
1232         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1233                  !strcasecmp(charset, "US-ASCII"))
1234                 return ENC_7BIT;
1235         else
1236                 return ENC_8BIT;
1237                 /* return ENC_BASE64; */
1238                 /* return ENC_QUOTED_PRINTABLE; */
1239 }
1240
1241 const gchar *procmime_get_encoding_str(EncodingType encoding)
1242 {
1243         static const gchar *encoding_str[] = {
1244                 "7bit", "8bit", "quoted-printable", "base64", "x-uuencode",
1245                 NULL
1246         };
1247
1248         if (encoding >= ENC_7BIT && encoding <= ENC_UNKNOWN)
1249                 return encoding_str[encoding];
1250         else
1251                 return NULL;
1252 }