src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <locale.h>
  30 #include <ctype.h>
  31
  32 #include "intl.h"
  33 #include "procmime.h"
  34 #include "procheader.h"
  35 #include "base64.h"
  36 #include "uuencode.h"
  37 #include "unmime.h"
  38 #include "html.h"
  39 #include "enriched.h"
  40 #include "codeconv.h"
  41 #include "utils.h"
  42 #include "prefs_common.h"
  43
  44 #if USE_GPGME
  45 #  include "rfc2015.h"
  46 #endif
  47
  48 #include "prefs.h"
  49
  50 static GHashTable *procmime_get_mime_type_table (void);
  51
  52 MimeInfo *procmime_mimeinfo_new(void)
  53 {
  54         MimeInfo *mimeinfo;
  55
  56         mimeinfo = g_new0(MimeInfo, 1);
  57         mimeinfo->mime_type     = MIME_UNKNOWN;
  58         mimeinfo->encoding_type = ENC_UNKNOWN;
  59
  60         return mimeinfo;
  61 }
  62
  63 void procmime_mimeinfo_free(MimeInfo *mimeinfo)
  64 {
  65         if (!mimeinfo) return;
  66
  67         g_free(mimeinfo->encoding);
  68         g_free(mimeinfo->content_type);
  69         g_free(mimeinfo->charset);
  70         g_free(mimeinfo->name);
  71         g_free(mimeinfo->boundary);
  72         g_free(mimeinfo->content_disposition);
  73         g_free(mimeinfo->filename);
  74 #if USE_GPGME
  75         g_free(mimeinfo->plaintextfile);
  76         g_free(mimeinfo->sigstatus);
  77         g_free(mimeinfo->sigstatus_full);
  78 #endif
  79
  80         procmime_mimeinfo_free(mimeinfo->sub);
  81
  82         g_free(mimeinfo);
  83 }
  84
  85 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  86 {
  87         while (mimeinfo != NULL) {
  88                 MimeInfo *next;
  89
  90                 g_free(mimeinfo->encoding);
  91                 g_free(mimeinfo->content_type);
  92                 g_free(mimeinfo->charset);
  93                 g_free(mimeinfo->name);
  94                 g_free(mimeinfo->boundary);
  95                 g_free(mimeinfo->content_disposition);
  96                 g_free(mimeinfo->filename);
  97 #if USE_GPGME
  98                 g_free(mimeinfo->plaintextfile);
  99                 g_free(mimeinfo->sigstatus);
 100                 g_free(mimeinfo->sigstatus_full);
 101 #endif
 102
 103                 procmime_mimeinfo_free_all(mimeinfo->sub);
 104                 procmime_mimeinfo_free_all(mimeinfo->children);
 105 #if USE_GPGME
 106                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
 107 #endif
 108
 109                 next = mimeinfo->next;
 110                 g_free(mimeinfo);
 111                 mimeinfo = next;
 112         }
 113 }
 114
 115 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 116 {
 117         MimeInfo *child = parent->children;
 118
 119         if (!child)
 120                 parent->children = mimeinfo;
 121         else {
 122                 while (child->next != NULL)
 123                         child = child->next;
 124
 125                 child->next = mimeinfo;
 126         }
 127
 128         mimeinfo->parent = parent;
 129         mimeinfo->level = parent->level + 1;
 130
 131         return mimeinfo;
 132 }
 133
 134 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 135 {
 136         MimeInfo *parent = old->parent;
 137         MimeInfo *child;
 138
 139         g_return_if_fail(parent != NULL);
 140         g_return_if_fail(new->next == NULL);
 141
 142         for (child = parent->children; child && child != old;
 143              child = child->next)
 144                 ;
 145         if (!child) {
 146                 g_warning("oops: parent can't find it's own child");
 147                 return;
 148         }
 149         procmime_mimeinfo_free_all(old);
 150
 151         if (child == parent->children) {
 152                 new->next = parent->children->next;
 153                 parent->children = new;
 154         } else {
 155                 new->next = child->next;
 156                 child = new;
 157         }
 158 }
 159
 160 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 161 {
 162         if (!mimeinfo) return NULL;
 163
 164         if (mimeinfo->children)
 165                 return mimeinfo->children;
 166         if (mimeinfo->sub)
 167                 return mimeinfo->sub;
 168         if (mimeinfo->next)
 169                 return mimeinfo->next;
 170
 171         if (mimeinfo->main) {
 172                 mimeinfo = mimeinfo->main;
 173                 if (mimeinfo->next)
 174                         return mimeinfo->next;
 175         }
 176
 177         for (mimeinfo = mimeinfo->parent; mimeinfo != NULL;
 178              mimeinfo = mimeinfo->parent) {
 179                 if (mimeinfo->next)
 180                         return mimeinfo->next;
 181                 if (mimeinfo->main) {
 182                         mimeinfo = mimeinfo->main;
 183                         if (mimeinfo->next)
 184                                 return mimeinfo->next;
 185                 }
 186         }
 187
 188         return NULL;
 189 }
 190
 191 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 192 {
 193         FILE *fp;
 194         MimeInfo *mimeinfo;
 195
 196         g_return_val_if_fail(msginfo != NULL, NULL);
 197
 198         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 199         mimeinfo = procmime_scan_mime_header(fp);
 200
 201         if (mimeinfo) {
 202                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 203                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 204                                 perror("fseek");
 205                 }
 206                 if (mimeinfo->mime_type != MIME_TEXT)
 207                         procmime_scan_multipart_message(mimeinfo, fp);
 208         }
 209
 210 #if USE_GPGME
 211         if (prefs_common.auto_check_signatures)
 212                 rfc2015_check_signature(mimeinfo, fp);
 213 #endif
 214         fclose(fp);
 215
 216         return mimeinfo;
 217 }
 218
 219 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 220 {
 221         gchar *p;
 222         gchar *boundary;
 223         gint boundary_len = 0;
 224         gchar buf[BUFFSIZE];
 225         glong fpos, prev_fpos;
 226         gint npart;
 227
 228         g_return_if_fail(mimeinfo != NULL);
 229         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 230
 231         if (mimeinfo->mime_type == MIME_MULTIPART) {
 232                 g_return_if_fail(mimeinfo->boundary != NULL);
 233                 g_return_if_fail(mimeinfo->sub == NULL);
 234         }
 235         g_return_if_fail(fp != NULL);
 236
 237         boundary = mimeinfo->boundary;
 238
 239         if (boundary) {
 240                 boundary_len = strlen(boundary);
 241
 242                 /* look for first boundary */
 243                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 244                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 245                 if (!p) return;
 246         }
 247
 248         if ((fpos = ftell(fp)) < 0) {
 249                 perror("ftell");
 250                 return;
 251         }
 252
 253         for (npart = 0;; npart++) {
 254                 MimeInfo *partinfo;
 255                 gboolean eom = FALSE;
 256
 257                 prev_fpos = fpos;
 258                 debug_print("prev_fpos: %ld\n", fpos);
 259
 260                 partinfo = procmime_scan_mime_header(fp);
 261                 if (!partinfo) break;
 262                 procmime_mimeinfo_insert(mimeinfo, partinfo);
 263
 264                 if (partinfo->mime_type == MIME_MULTIPART) {
 265                         if (partinfo->level < 8)
 266                                 procmime_scan_multipart_message(partinfo, fp);
 267                 } else if (partinfo->mime_type == MIME_MESSAGE_RFC822) {
 268                         MimeInfo *sub;
 269
 270                         partinfo->sub = sub = procmime_scan_mime_header(fp);
 271                         if (!sub) break;
 272
 273                         sub->level = partinfo->level + 1;
 274                         sub->parent = partinfo->parent;
 275                         sub->main = partinfo;
 276
 277                         if (sub->level < 8) {
 278                                 if (sub->mime_type == MIME_MULTIPART) {
 279                                         procmime_scan_multipart_message
 280                                                 (sub, fp);
 281                                 } else if (sub->mime_type == MIME_MESSAGE_RFC822) {
 282                                         fseek(fp, sub->fpos, SEEK_SET);
 283                                         procmime_scan_multipart_message
 284                                                 (sub, fp);
 285                                 }
 286                         }
 287                 }
 288
 289                 /* look for next boundary */
 290                 buf[0] = '\0';
 291                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 292                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 293                                 if (buf[2 + boundary_len]     == '-' &&
 294                                     buf[2 + boundary_len + 1] == '-')
 295                                         eom = TRUE;
 296                                 break;
 297                         }
 298                 }
 299                 if (p == NULL) {
 300                         /* broken MIME, or single part MIME message */
 301                         buf[0] = '\0';
 302                         eom = TRUE;
 303                 }
 304                 fpos = ftell(fp);
 305                 debug_print("fpos: %ld\n", fpos);
 306
 307                 partinfo->size = fpos - prev_fpos - strlen(buf);
 308                 debug_print("partinfo->size: %d\n", partinfo->size);
 309                 if (partinfo->sub && !partinfo->sub->sub &&
 310                     !partinfo->sub->children) {
 311                         partinfo->sub->size = fpos - partinfo->sub->fpos - strlen(buf);
 312                         debug_print("partinfo->sub->size: %d\n",
 313                                     partinfo->sub->size);
 314                 }
 315                 debug_print("boundary: %s\n", buf);
 316
 317                 if (eom) break;
 318         }
 319 }
 320
 321 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 322 {
 323         gchar *buf;
 324
 325         Xstrdup_a(buf, encoding, return);
 326
 327         g_free(mimeinfo->encoding);
 328
 329         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 330         if (!strcasecmp(buf, "7bit"))
 331                 mimeinfo->encoding_type = ENC_7BIT;
 332         else if (!strcasecmp(buf, "8bit"))
 333                 mimeinfo->encoding_type = ENC_8BIT;
 334         else if (!strcasecmp(buf, "quoted-printable"))
 335                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 336         else if (!strcasecmp(buf, "base64"))
 337                 mimeinfo->encoding_type = ENC_BASE64;
 338         else if (!strcasecmp(buf, "x-uuencode"))
 339                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 340         else
 341                 mimeinfo->encoding_type = ENC_UNKNOWN;
 342
 343 }
 344
 345 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 346 {
 347         gchar *delim, *p, *cnttype;
 348         gchar *buf;
 349
 350         if (conv_get_current_charset() == C_EUC_JP &&
 351             strchr(content_type, '\033')) {
 352                 gint len;
 353                 len = strlen(content_type) * 2 + 1;
 354                 Xalloca(buf, len, return);
 355                 conv_jistoeuc(buf, len, content_type);
 356         } else
 357                 Xstrdup_a(buf, content_type, return);
 358
 359         g_free(mimeinfo->content_type);
 360         g_free(mimeinfo->charset);
 361         /* g_free(mimeinfo->name); */
 362         mimeinfo->content_type = NULL;
 363         mimeinfo->charset      = NULL;
 364         /* mimeinfo->name      = NULL; */
 365
 366         if ((delim = strchr(buf, ';'))) *delim = '\0';
 367         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 368
 369         mimeinfo->mime_type = procmime_scan_mime_type(cnttype);
 370
 371         if (!delim) return;
 372         p = delim + 1;
 373
 374         for (;;) {
 375                 gchar *eq;
 376                 gchar *attr, *value;
 377
 378                 if ((delim = strchr(p, ';'))) *delim = '\0';
 379
 380                 if (!(eq = strchr(p, '='))) break;
 381
 382                 *eq = '\0';
 383                 attr = p;
 384                 g_strstrip(attr);
 385                 value = eq + 1;
 386                 g_strstrip(value);
 387
 388                 if (*value == '"')
 389                         extract_quote(value, '"');
 390                 else {
 391                         eliminate_parenthesis(value, '(', ')');
 392                         g_strstrip(value);
 393                 }
 394
 395                 if (*value) {
 396                         if (!strcasecmp(attr, "charset"))
 397                                 mimeinfo->charset = g_strdup(value);
 398                         else if (!strcasecmp(attr, "name")) {
 399                                 gchar *tmp;
 400                                 size_t len;
 401
 402                                 len = strlen(value) + 1;
 403                                 Xalloca(tmp, len, return);
 404                                 conv_unmime_header(tmp, len, value, NULL);
 405                                 g_free(mimeinfo->name);
 406                                 mimeinfo->name = g_strdup(tmp);
 407                         } else if (!strcasecmp(attr, "boundary"))
 408                                 mimeinfo->boundary = g_strdup(value);
 409                 }
 410
 411                 if (!delim) break;
 412                 p = delim + 1;
 413         }
 414
 415         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 416                 mimeinfo->mime_type = MIME_TEXT;
 417 }
 418
 419 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 420                                        const gchar *content_disposition)
 421 {
 422         gchar *delim, *p, *dispos;
 423         gchar *buf;
 424
 425         if (conv_get_current_charset() == C_EUC_JP &&
 426             strchr(content_disposition, '\033')) {
 427                 gint len;
 428                 len = strlen(content_disposition) * 2 + 1;
 429                 Xalloca(buf, len, return);
 430                 conv_jistoeuc(buf, len, content_disposition);
 431         } else
 432                 Xstrdup_a(buf, content_disposition, return);
 433
 434         if ((delim = strchr(buf, ';'))) *delim = '\0';
 435         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 436
 437         if (!delim) return;
 438         p = delim + 1;
 439
 440         for (;;) {
 441                 gchar *eq;
 442                 gchar *attr, *value;
 443
 444                 if ((delim = strchr(p, ';'))) *delim = '\0';
 445
 446                 if (!(eq = strchr(p, '='))) break;
 447
 448                 *eq = '\0';
 449                 attr = p;
 450                 g_strstrip(attr);
 451                 value = eq + 1;
 452                 g_strstrip(value);
 453
 454                 if (*value == '"')
 455                         extract_quote(value, '"');
 456                 else {
 457                         eliminate_parenthesis(value, '(', ')');
 458                         g_strstrip(value);
 459                 }
 460
 461                 if (*value) {
 462                         if (!strcasecmp(attr, "filename")) {
 463                                 gchar *tmp;
 464                                 size_t len;
 465
 466                                 len = strlen(value) + 1;
 467                                 Xalloca(tmp, len, return);
 468                                 conv_unmime_header(tmp, len, value, NULL);
 469                                 g_free(mimeinfo->filename);
 470                                 mimeinfo->filename = g_strdup(tmp);
 471                                 break;
 472                         }
 473                 }
 474
 475                 if (!delim) break;
 476                 p = delim + 1;
 477         }
 478 }
 479
 480 void procmime_scan_content_description(MimeInfo *mimeinfo,
 481                                        const gchar *content_description)
 482 {
 483         gchar *buf;
 484
 485         gchar *tmp;
 486         size_t blen;
 487
 488         if (conv_get_current_charset() == C_EUC_JP &&
 489             strchr(content_description, '\033')) {
 490                 gint len;
 491                 len = strlen(content_description) * 2 + 1;
 492                 Xalloca(buf, len, return);
 493                 conv_jistoeuc(buf, len, content_description);
 494         } else
 495                 Xstrdup_a(buf, content_description, return);
 496
 497         blen = strlen(buf) + 1;
 498         Xalloca(tmp, blen, return);
 499         conv_unmime_header(tmp, blen, buf, NULL);
 500         g_free(mimeinfo->name);
 501         mimeinfo->name = g_strdup(tmp);
 502 }
 503
 504 void procmime_scan_subject(MimeInfo *mimeinfo,
 505                            const gchar *subject)
 506 {
 507         gchar *buf;
 508
 509         gchar *tmp;
 510         size_t blen;
 511
 512         if (conv_get_current_charset() == C_EUC_JP &&
 513             strchr(subject, '\033')) {
 514                 gint len;
 515                 len = strlen(subject) * 2 + 1;
 516                 Xalloca(buf, len, return);
 517                 conv_jistoeuc(buf, len, subject);
 518         } else
 519                 Xstrdup_a(buf, subject, return);
 520
 521         blen = strlen(buf) + 1;
 522         Xalloca(tmp, blen, return);
 523         conv_unmime_header(tmp, blen, buf, NULL);
 524         g_free(mimeinfo->name);
 525         mimeinfo->name = g_strdup(tmp);
 526 }
 527
 528 enum
 529 {
 530         H_CONTENT_TRANSFER_ENCODING = 0,
 531         H_CONTENT_TYPE              = 1,
 532         H_CONTENT_DISPOSITION       = 2,
 533         H_CONTENT_DESCRIPTION       = 3,
 534         H_SUBJECT                   = 4
 535 };
 536
 537 MimeInfo *procmime_scan_mime_header(FILE *fp)
 538 {
 539         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 540                                                           NULL, FALSE},
 541                                        {"Content-Type:", NULL, TRUE},
 542                                        {"Content-Disposition:",
 543                                                           NULL, TRUE},
 544                                        {"Content-description:",
 545                                                           NULL, TRUE},
 546                                        {"Subject:",
 547                                                           NULL, TRUE},
 548                                        {NULL,             NULL, FALSE}};
 549         gchar buf[BUFFSIZE];
 550         gint hnum;
 551         HeaderEntry *hp;
 552         MimeInfo *mimeinfo;
 553
 554         g_return_val_if_fail(fp != NULL, NULL);
 555
 556         mimeinfo = procmime_mimeinfo_new();
 557         mimeinfo->mime_type = MIME_TEXT;
 558         mimeinfo->encoding_type = ENC_7BIT;
 559         mimeinfo->fpos = ftell(fp);
 560
 561         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 562                != -1) {
 563                 hp = hentry + hnum;
 564
 565                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 566                         procmime_scan_encoding
 567                                 (mimeinfo, buf + strlen(hp->name));
 568                 } else if (H_CONTENT_TYPE == hnum) {
 569                         procmime_scan_content_type
 570                                 (mimeinfo, buf + strlen(hp->name));
 571                 } else if (H_CONTENT_DISPOSITION == hnum) {
 572                         procmime_scan_content_disposition
 573                                 (mimeinfo, buf + strlen(hp->name));
 574                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 575                         procmime_scan_content_description
 576                                 (mimeinfo, buf + strlen(hp->name));
 577                 } else if (H_SUBJECT == hnum) {
 578                         procmime_scan_subject
 579                                 (mimeinfo, buf + strlen(hp->name));
 580                 }
 581         }
 582
 583         if (mimeinfo->mime_type == MIME_APPLICATION_OCTET_STREAM &&
 584             mimeinfo->name) {
 585                 const gchar *type;
 586                 type = procmime_get_mime_type(mimeinfo->name);
 587                 if (type)
 588                         mimeinfo->mime_type = procmime_scan_mime_type(type);
 589         }
 590
 591         if (!mimeinfo->content_type)
 592                         mimeinfo->content_type = g_strdup("text/plain");
 593
 594         return mimeinfo;
 595 }
 596
 597 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 598 {
 599         gchar buf[BUFFSIZE];
 600         gchar *boundary = NULL;
 601         gint boundary_len = 0;
 602         gboolean tmp_file = FALSE;
 603
 604         g_return_val_if_fail(infp != NULL, NULL);
 605         g_return_val_if_fail(mimeinfo != NULL, NULL);
 606
 607         if (!outfp) {
 608                 outfp = my_tmpfile();
 609                 if (!outfp) {
 610                         perror("tmpfile");
 611                         return NULL;
 612                 }
 613                 tmp_file = TRUE;
 614         }
 615
 616         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 617                 boundary = mimeinfo->parent->boundary;
 618                 boundary_len = strlen(boundary);
 619         }
 620
 621         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 622                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 623                        (!boundary ||
 624                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 625                         gint len;
 626                         len = unmime_quoted_printable_line(buf);
 627                         fwrite(buf, len, 1, outfp);
 628                 }
 629         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 630                 gchar outbuf[BUFFSIZE];
 631                 gint len;
 632                 Base64Decoder *decoder;
 633
 634                 decoder = base64_decoder_new();
 635                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 636                        (!boundary ||
 637                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 638                         len = base64_decoder_decode(decoder, buf, outbuf);
 639                         if (len < 0) {
 640                                 g_warning("Bad BASE64 content\n");
 641                                 break;
 642                         }
 643                         fwrite(outbuf, sizeof(gchar), len, outfp);
 644                 }
 645                 base64_decoder_free(decoder);
 646         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 647                 gchar outbuf[BUFFSIZE];
 648                 gint len;
 649                 gboolean flag = FALSE;
 650
 651                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 652                        (!boundary ||
 653                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 654                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 655
 656                         if (flag) {
 657                                 len = fromuutobits(outbuf, buf);
 658                                 if (len <= 0) {
 659                                         if (len < 0)
 660                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 661                                         break;
 662                                 }
 663                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 664                         } else
 665                                 flag = TRUE;
 666                 }
 667         } else {
 668                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 669                        (!boundary ||
 670                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 671                         fputs(buf, outfp);
 672                 }
 673         }
 674
 675         if (tmp_file) rewind(outfp);
 676         return outfp;
 677 }
 678
 679 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 680                        MimeInfo *mimeinfo)
 681 {
 682         FILE *infp, *outfp;
 683         gchar buf[BUFFSIZE];
 684
 685         g_return_val_if_fail(outfile != NULL, -1);
 686         g_return_val_if_fail(infile != NULL, -1);
 687         g_return_val_if_fail(mimeinfo != NULL, -1);
 688
 689         if ((infp = fopen(infile, "rb")) == NULL) {
 690                 FILE_OP_ERROR(infile, "fopen");
 691                 return -1;
 692         }
 693         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 694                 FILE_OP_ERROR(infile, "fseek");
 695                 fclose(infp);
 696                 return -1;
 697         }
 698         if ((outfp = fopen(outfile, "wb")) == NULL) {
 699                 FILE_OP_ERROR(outfile, "fopen");
 700                 fclose(infp);
 701                 return -1;
 702         }
 703
 704         while (fgets(buf, sizeof(buf), infp) != NULL)
 705                 if (buf[0] == '\r' || buf[0] == '\n') break;
 706
 707         procmime_decode_content(outfp, infp, mimeinfo);
 708
 709         fclose(infp);
 710         if (fclose(outfp) == EOF) {
 711                 FILE_OP_ERROR(outfile, "fclose");
 712                 unlink(outfile);
 713                 return -1;
 714         }
 715
 716         return 0;
 717 }
 718
 719 struct ContentRenderer {
 720         char * content_type;
 721         char * renderer;
 722 };
 723
 724 static GList * renderer_list = NULL;
 725
 726 static struct ContentRenderer *
 727 content_renderer_new(char * content_type, char * renderer)
 728 {
 729         struct ContentRenderer * cr;
 730
 731         cr = g_new(struct ContentRenderer, 1);
 732         if (cr == NULL)
 733                 return NULL;
 734
 735         cr->content_type = g_strdup(content_type);
 736         cr->renderer = g_strdup(renderer);
 737
 738         return cr;
 739 }
 740
 741 static void content_renderer_free(struct ContentRenderer * cr)
 742 {
 743         g_free(cr->content_type);
 744         g_free(cr->renderer);
 745         g_free(cr);
 746 }
 747
 748 void renderer_read_config(void)
 749 {
 750         gchar buf[BUFFSIZE];
 751         FILE * f;
 752         gchar * rcpath;
 753
 754         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 755         renderer_list = NULL;
 756
 757         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 758         f = fopen(rcpath, "rb");
 759         g_free(rcpath);
 760
 761         if (f == NULL)
 762                 return;
 763
 764         while (fgets(buf, BUFFSIZE, f)) {
 765                 char * p;
 766                 struct ContentRenderer * cr;
 767
 768                 strretchomp(buf);
 769                 p = strchr(buf, ' ');
 770                 if (p == NULL)
 771                         continue;
 772                 * p = 0;
 773
 774                 cr = content_renderer_new(buf, p + 1);
 775                 if (cr == NULL)
 776                         continue;
 777
 778                 renderer_list = g_list_append(renderer_list, cr);
 779         }
 780
 781         fclose(f);
 782 }
 783
 784 void renderer_write_config(void)
 785 {
 786         gchar * rcpath;
 787         PrefFile *pfile;
 788         GList * cur;
 789
 790         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 791
 792         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 793                 g_warning(_("failed to write configuration to file\n"));
 794                 g_free(rcpath);
 795                 return;
 796         }
 797
 798         g_free(rcpath);
 799
 800         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 801                 struct ContentRenderer * renderer;
 802                 renderer = cur->data;
 803                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 804                         renderer->renderer);
 805         }
 806
 807         if (prefs_write_close(pfile) < 0) {
 808                 g_warning(_("failed to write configuration to file\n"));
 809                 return;
 810         }
 811 }
 812
 813 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 814 {
 815         FILE *tmpfp, *outfp;
 816         gchar *src_codeset;
 817         gboolean conv_fail = FALSE;
 818         gchar buf[BUFFSIZE];
 819         gchar *str;
 820         struct ContentRenderer * renderer;
 821         GList * cur;
 822
 823         g_return_val_if_fail(mimeinfo != NULL, NULL);
 824         g_return_val_if_fail(infp != NULL, NULL);
 825         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 826                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 827                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 828
 829         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 830                 perror("fseek");
 831                 return NULL;
 832         }
 833
 834         while (fgets(buf, sizeof(buf), infp) != NULL)
 835                 if (buf[0] == '\r' || buf[0] == '\n') break;
 836
 837         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 838         if (!tmpfp)
 839                 return NULL;
 840
 841         if ((outfp = my_tmpfile()) == NULL) {
 842                 perror("tmpfile");
 843                 fclose(tmpfp);
 844                 return NULL;
 845         }
 846
 847         src_codeset = prefs_common.force_charset
 848                 ? prefs_common.force_charset : mimeinfo->charset;
 849
 850         renderer = NULL;
 851
 852         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 853                 struct ContentRenderer * cr;
 854                 cr = cur->data;
 855                 if (g_strcasecmp(cr->content_type,
 856                                  mimeinfo->content_type) == 0) {
 857                         renderer = cr;
 858                         break;
 859                 }
 860         }
 861
 862         if (renderer != NULL) {
 863                 FILE * p;
 864                 int oldout;
 865
 866                 oldout = dup(1);
 867
 868                 dup2(fileno(outfp), 1);
 869
 870                 p = popen(renderer->renderer, "w");
 871                 if (p != NULL) {
 872                         size_t count;
 873
 874                         while ((count =
 875                                 fread(buf, sizeof(char), sizeof(buf),
 876                                       tmpfp)) > 0)
 877                                 fwrite(buf, sizeof(char), count, p);
 878                         pclose(p);
 879                 }
 880
 881                 dup2(oldout, 1);
 882         } else if (mimeinfo->mime_type == MIME_TEXT) {
 883                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 884                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 885                         if (str) {
 886                                 fputs(str, outfp);
 887                                 g_free(str);
 888                         } else {
 889                                 conv_fail = TRUE;
 890                                 fputs(buf, outfp);
 891                         }
 892                 }
 893         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 894                 HTMLParser *parser;
 895                 CodeConverter *conv;
 896
 897                 conv = conv_code_converter_new(src_codeset);
 898                 parser = html_parser_new(tmpfp, conv);
 899                 while ((str = html_parse(parser)) != NULL) {
 900                         fputs(str, outfp);
 901                 }
 902                 html_parser_destroy(parser);
 903                 conv_code_converter_destroy(conv);
 904         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 905                 ERTFParser *parser;
 906                 CodeConverter *conv;
 907
 908                 conv = conv_code_converter_new(src_codeset);
 909                 parser = ertf_parser_new(tmpfp, conv);
 910                 while ((str = ertf_parse(parser)) != NULL) {
 911                         fputs(str, outfp);
 912                 }
 913                 ertf_parser_destroy(parser);
 914                 conv_code_converter_destroy(conv);
 915         }
 916
 917         if (conv_fail)
 918                 g_warning(_("procmime_get_text_content(): Code conversion failed.\n"));
 919
 920         fclose(tmpfp);
 921         rewind(outfp);
 922
 923         return outfp;
 924 }
 925
 926 /* search the first text part of (multipart) MIME message,
 927    decode, convert it and output to outfp. */
 928 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 929 {
 930         FILE *infp, *outfp = NULL;
 931         MimeInfo *mimeinfo, *partinfo;
 932
 933         g_return_val_if_fail(msginfo != NULL, NULL);
 934
 935         mimeinfo = procmime_scan_message(msginfo);
 936         if (!mimeinfo) return NULL;
 937
 938         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 939                 procmime_mimeinfo_free_all(mimeinfo);
 940                 return NULL;
 941         }
 942
 943         partinfo = mimeinfo;
 944         while (partinfo && partinfo->mime_type != MIME_TEXT)
 945                 partinfo = procmime_mimeinfo_next(partinfo);
 946         if (!partinfo) {
 947                 partinfo = mimeinfo;
 948                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 949                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 950                         partinfo = procmime_mimeinfo_next(partinfo);
 951         }
 952
 953
 954         if (partinfo)
 955                 outfp = procmime_get_text_content(partinfo, infp);
 956
 957         fclose(infp);
 958         procmime_mimeinfo_free_all(mimeinfo);
 959
 960         return outfp;
 961 }
 962
 963 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 964                                    const gchar *str, gboolean case_sens)
 965 {
 966
 967         FILE *infp, *outfp;
 968         gchar buf[BUFFSIZE];
 969         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 970
 971         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 972         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 973                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 974                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 975         g_return_val_if_fail(str != NULL, FALSE);
 976
 977         if ((infp = fopen(filename, "rb")) == NULL) {
 978                 FILE_OP_ERROR(filename, "fopen");
 979                 return FALSE;
 980         }
 981
 982         outfp = procmime_get_text_content(mimeinfo, infp);
 983         fclose(infp);
 984
 985         if (!outfp)
 986                 return FALSE;
 987
 988         if (case_sens)
 989                 StrFindFunc = strstr;
 990         else
 991                 StrFindFunc = strcasestr;
 992
 993         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 994                 if (StrFindFunc(buf, str) != NULL) {
 995                         fclose(outfp);
 996                         return TRUE;
 997                 }
 998         }
 999
1000         fclose(outfp);
1001
1002         return FALSE;
1003 }
1004
1005 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
1006                               gboolean case_sens)
1007 {
1008         MimeInfo *mimeinfo;
1009         MimeInfo *partinfo;
1010         gchar *filename;
1011         gboolean found = FALSE;
1012
1013         g_return_val_if_fail(msginfo != NULL, FALSE);
1014         g_return_val_if_fail(str != NULL, FALSE);
1015
1016         filename = procmsg_get_message_file(msginfo);
1017         if (!filename) return FALSE;
1018         mimeinfo = procmime_scan_message(msginfo);
1019
1020         for (partinfo = mimeinfo; partinfo != NULL;
1021              partinfo = procmime_mimeinfo_next(partinfo)) {
1022                 if (partinfo->mime_type == MIME_TEXT ||
1023                     partinfo->mime_type == MIME_TEXT_HTML ||
1024                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1025                         if (procmime_find_string_part
1026                                 (partinfo, filename, str, case_sens) == TRUE) {
1027                                 found = TRUE;
1028                                 break;
1029                         }
1030                 }
1031         }
1032
1033         procmime_mimeinfo_free_all(mimeinfo);
1034         g_free(filename);
1035
1036         return found;
1037 }
1038
1039 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1040 {
1041         static guint32 id = 0;
1042         gchar *base;
1043         gchar *filename;
1044         gchar f_prefix[10];
1045
1046         g_return_val_if_fail(mimeinfo != NULL, NULL);
1047
1048         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1049
1050         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1051                 base = "mimetmp.html";
1052         else {
1053                 base = mimeinfo->filename ? mimeinfo->filename
1054                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1055                 base = g_basename(base);
1056                 if (*base == '\0') base = "mimetmp";
1057                 Xstrdup_a(base, base, return NULL);
1058                 subst_for_filename(base);
1059         }
1060
1061         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1062                                f_prefix, base, NULL);
1063
1064         return filename;
1065 }
1066
1067 ContentType procmime_scan_mime_type(const gchar *mime_type)
1068 {
1069         ContentType type;
1070
1071         if (!strncasecmp(mime_type, "text/html", 9))
1072                 type = MIME_TEXT_HTML;
1073         else if (!strncasecmp(mime_type, "text/enriched", 13))
1074                 type = MIME_TEXT_ENRICHED;
1075         else if (!strncasecmp(mime_type, "text/", 5))
1076                 type = MIME_TEXT;
1077         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1078                 type = MIME_MESSAGE_RFC822;
1079         else if (!strncasecmp(mime_type, "message/", 8))
1080                 type = MIME_TEXT;
1081         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1082                 type = MIME_APPLICATION_OCTET_STREAM;
1083         else if (!strncasecmp(mime_type, "application/", 12))
1084                 type = MIME_APPLICATION;
1085         else if (!strncasecmp(mime_type, "multipart/", 10))
1086                 type = MIME_MULTIPART;
1087         else if (!strncasecmp(mime_type, "image/", 6))
1088                 type = MIME_IMAGE;
1089         else if (!strncasecmp(mime_type, "audio/", 6))
1090                 type = MIME_AUDIO;
1091         else if (!strcasecmp(mime_type, "text"))
1092                 type = MIME_TEXT;
1093         else
1094                 type = MIME_UNKNOWN;
1095
1096         return type;
1097 }
1098
1099 static GList *mime_type_list = NULL;
1100
1101 gchar *procmime_get_mime_type(const gchar *filename)
1102 {
1103         static GHashTable *mime_type_table = NULL;
1104         MimeType *mime_type;
1105         const gchar *p;
1106         gchar *ext;
1107
1108         if (!mime_type_table) {
1109                 mime_type_table = procmime_get_mime_type_table();
1110                 if (!mime_type_table) return NULL;
1111         }
1112
1113         filename = g_basename(filename);
1114         p = strrchr(filename, '.');
1115         if (!p) return NULL;
1116
1117         Xstrdup_a(ext, p + 1, return NULL);
1118         g_strdown(ext);
1119         mime_type = g_hash_table_lookup(mime_type_table, ext);
1120         if (mime_type) {
1121                 gchar *str;
1122
1123                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1124                                   NULL);
1125                 return str;
1126         }
1127
1128         return NULL;
1129 }
1130
1131 static guint procmime_str_hash(gconstpointer gptr)
1132 {
1133         guint hash_result = 0;
1134         const char *str;
1135
1136         for (str = gptr; str && *str; str++) {
1137                 if (isupper(*str)) hash_result += (*str + ' ');
1138                 else hash_result += *str;
1139         }
1140
1141         return hash_result;
1142 }
1143
1144 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1145 {
1146         const char *str1 = gptr1;
1147         const char *str2 = gptr2;
1148
1149         return !strcasecmp(str1, str2);
1150 }
1151
1152 static GHashTable *procmime_get_mime_type_table(void)
1153 {
1154         GHashTable *table = NULL;
1155         GList *cur;
1156         MimeType *mime_type;
1157         gchar **exts;
1158
1159         if (!mime_type_list) {
1160                 mime_type_list = procmime_get_mime_type_list();
1161                 if (!mime_type_list) return NULL;
1162         }
1163
1164         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1165
1166         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1167                 gint i;
1168                 gchar *key;
1169
1170                 mime_type = (MimeType *)cur->data;
1171
1172                 if (!mime_type->extension) continue;
1173
1174                 exts = g_strsplit(mime_type->extension, " ", 16);
1175                 for (i = 0; exts[i] != NULL; i++) {
1176                         /* make the key case insensitive */
1177                         g_strdown(exts[i]);
1178                         /* use previously dup'd key on overwriting */
1179                         if (g_hash_table_lookup(table, exts[i]))
1180                                 key = exts[i];
1181                         else
1182                                 key = g_strdup(exts[i]);
1183                         g_hash_table_insert(table, key, mime_type);
1184                 }
1185                 g_strfreev(exts);
1186         }
1187
1188         return table;
1189 }
1190
1191 GList *procmime_get_mime_type_list(void)
1192 {
1193         GList *list = NULL;
1194         FILE *fp;
1195         gchar buf[BUFFSIZE];
1196         gchar *p, *delim;
1197         MimeType *mime_type;
1198
1199         if (mime_type_list)
1200                 return mime_type_list;
1201
1202         if ((fp = fopen("/etc/mime.types", "rb")) == NULL) {
1203                 if ((fp = fopen(SYSCONFDIR "/mime.types", "rb")) == NULL) {
1204                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1205                         return NULL;
1206                 }
1207         }
1208
1209         while (fgets(buf, sizeof(buf), fp) != NULL) {
1210                 p = strchr(buf, '#');
1211                 if (p) *p = '\0';
1212                 g_strstrip(buf);
1213
1214                 p = buf;
1215                 while (*p && !isspace(*p)) p++;
1216                 if (*p) {
1217                         *p = '\0';
1218                         p++;
1219                 }
1220                 delim = strchr(buf, '/');
1221                 if (delim == NULL) continue;
1222                 *delim = '\0';
1223
1224                 mime_type = g_new(MimeType, 1);
1225                 mime_type->type = g_strdup(buf);
1226                 mime_type->sub_type = g_strdup(delim + 1);
1227
1228                 while (*p && isspace(*p)) p++;
1229                 if (*p)
1230                         mime_type->extension = g_strdup(p);
1231                 else
1232                         mime_type->extension = NULL;
1233
1234                 list = g_list_append(list, mime_type);
1235         }
1236
1237         fclose(fp);
1238
1239         if (!list)
1240                 g_warning("Can't read mime.types\n");
1241
1242         return list;
1243 }
1244
1245 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1246 {
1247         if (!charset)
1248                 return ENC_8BIT;
1249         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1250                  !strcasecmp(charset, "US-ASCII"))
1251                 return ENC_7BIT;
1252         else
1253                 return ENC_8BIT;
1254                 /* return ENC_BASE64; */
1255                 /* return ENC_QUOTED_PRINTABLE; */
1256 }
1257
1258 EncodingType procmime_get_encoding_for_file(const gchar *file)
1259 {
1260         FILE *fp;
1261         guchar buf[BUFSIZ];
1262         size_t len;
1263
1264         if ((fp = fopen(file, "rb")) == NULL) {
1265                 FILE_OP_ERROR(file, "fopen");
1266                 return ENC_UNKNOWN;
1267         }
1268
1269         while ((len = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
1270                 guchar *p;
1271                 gint i;
1272
1273                 for (p = buf, i = 0; i < len; p++, i++) {
1274                         if (*p & 0x80) {
1275                                 fclose(fp);
1276                                 return ENC_BASE64;
1277                         }
1278                 }
1279         }
1280
1281         fclose(fp);
1282         return ENC_7BIT;
1283 }
1284
1285 const gchar *procmime_get_encoding_str(EncodingType encoding)
1286 {
1287         static const gchar *encoding_str[] = {
1288                 "7bit", "8bit", "quoted-printable", "base64", "x-uuencode",
1289                 NULL
1290         };
1291
1292         if (encoding >= ENC_7BIT && encoding <= ENC_UNKNOWN)
1293                 return encoding_str[encoding];
1294         else
1295                 return NULL;
1296 }