src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999,2000 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 "codeconv.h"
  39 #include "utils.h"
  40 #include "prefs_common.h"
  41
  42 #if USE_GPGME
  43 #  include "rfc2015.h"
  44 #endif
  45
  46 static GHashTable *procmime_get_mime_type_table (void);
  47 static GList *procmime_get_mime_type_list       (void);
  48
  49
  50 MimeInfo *procmime_mimeinfo_new(void)
  51 {
  52         MimeInfo *mimeinfo;
  53
  54         mimeinfo = g_new0(MimeInfo, 1);
  55         mimeinfo->mime_type     = MIME_UNKNOWN;
  56         mimeinfo->encoding_type = ENC_UNKNOWN;
  57
  58         return mimeinfo;
  59 }
  60
  61 void procmime_mimeinfo_free(MimeInfo *mimeinfo)
  62 {
  63         if (!mimeinfo) return;
  64
  65         g_free(mimeinfo->encoding);
  66         g_free(mimeinfo->content_type);
  67         g_free(mimeinfo->charset);
  68         g_free(mimeinfo->name);
  69         g_free(mimeinfo->boundary);
  70         g_free(mimeinfo->content_disposition);
  71         g_free(mimeinfo->filename);
  72 #if USE_GPGME
  73         g_free(mimeinfo->plaintextfile);
  74         g_free(mimeinfo->sigstatus);
  75         g_free(mimeinfo->sigstatus_full);
  76 #endif
  77
  78         procmime_mimeinfo_free(mimeinfo->sub);
  79
  80         g_free(mimeinfo);
  81 }
  82
  83 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  84 {
  85         while (mimeinfo != NULL) {
  86                 MimeInfo *next;
  87
  88                 g_free(mimeinfo->encoding);
  89                 g_free(mimeinfo->content_type);
  90                 g_free(mimeinfo->charset);
  91                 g_free(mimeinfo->name);
  92                 g_free(mimeinfo->boundary);
  93                 g_free(mimeinfo->content_disposition);
  94                 g_free(mimeinfo->filename);
  95 #if USE_GPGME
  96                 g_free(mimeinfo->plaintextfile);
  97                 g_free(mimeinfo->sigstatus);
  98                 g_free(mimeinfo->sigstatus_full);
  99 #endif
 100
 101                 procmime_mimeinfo_free_all(mimeinfo->sub);
 102                 procmime_mimeinfo_free_all(mimeinfo->children);
 103 #if USE_GPGME
 104                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
 105 #endif
 106
 107                 next = mimeinfo->next;
 108                 g_free(mimeinfo);
 109                 mimeinfo = next;
 110         }
 111 }
 112
 113 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 114 {
 115         MimeInfo *child = parent->children;
 116
 117         if (!child)
 118                 parent->children = mimeinfo;
 119         else {
 120                 while (child->next != NULL)
 121                         child = child->next;
 122
 123                 child->next = mimeinfo;
 124         }
 125
 126         mimeinfo->parent = parent;
 127         mimeinfo->level = parent->level + 1;
 128
 129         return mimeinfo;
 130 }
 131
 132 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 133 {
 134         MimeInfo *parent = old->parent;
 135         MimeInfo *child;
 136
 137         if (!parent) {
 138                 g_warning("oops: Not top message");
 139                 return;
 140         }
 141         if (new->next) {
 142                 g_message("oops: new child should not have a sibling");
 143                 return;
 144         }
 145
 146         for (child = parent->children; child && child != old;
 147              child = child->next)
 148                 ;
 149         if (!child) {
 150                 g_warning("oops: parent can't find it's own child");
 151                 return;
 152         }
 153         procmime_mimeinfo_free_all(old);
 154
 155         if (child == parent->children) {
 156                 new->next = parent->children->next;
 157                 parent->children = new;
 158         } else {
 159                 new->next = child->next;
 160                 child = new;
 161         }
 162 }
 163
 164 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 165 {
 166         FILE *fp;
 167         MimeInfo *mimeinfo;
 168
 169         g_return_val_if_fail(msginfo != NULL, NULL);
 170
 171         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 172         mimeinfo = procmime_scan_mime_header(fp);
 173
 174         if (mimeinfo) {
 175                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 176                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 177                                 perror("fseek");
 178                 }
 179                 if (mimeinfo->mime_type != MIME_TEXT)
 180                         procmime_scan_multipart_message(mimeinfo, fp);
 181         }
 182
 183 #if USE_GPGME
 184         if (prefs_common.auto_check_signatures)
 185                 rfc2015_check_signature(mimeinfo, fp);
 186 #endif
 187         fclose(fp);
 188
 189         return mimeinfo;
 190 }
 191
 192 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 193 {
 194         gchar *p;
 195         gchar *boundary;
 196         gint boundary_len = 0;
 197         gchar buf[BUFFSIZE];
 198         glong fpos, prev_fpos;
 199         gint npart;
 200
 201         g_return_if_fail(mimeinfo != NULL);
 202         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 203
 204         if (mimeinfo->mime_type == MIME_MULTIPART) {
 205                 g_return_if_fail(mimeinfo->boundary != NULL);
 206                 g_return_if_fail(mimeinfo->sub == NULL);
 207         }
 208         g_return_if_fail(fp != NULL);
 209
 210         boundary = mimeinfo->boundary;
 211
 212         if (boundary) {
 213                 boundary_len = strlen(boundary);
 214
 215                 /* look for first boundary */
 216                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 217                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 218                 if (!p) return;
 219         }
 220
 221         if ((fpos = ftell(fp)) < 0) {
 222                 perror("ftell");
 223                 return;
 224         }
 225
 226         for (npart = 0;; npart++) {
 227                 MimeInfo *partinfo;
 228                 gboolean eom = FALSE;
 229
 230                 prev_fpos = fpos;
 231
 232                 partinfo = procmime_scan_mime_header(fp);
 233                 if (!partinfo) break;
 234                 procmime_mimeinfo_insert(mimeinfo, partinfo);
 235
 236                 if (partinfo->mime_type == MIME_MULTIPART) {
 237                         if (partinfo->level < 8)
 238                                 procmime_scan_multipart_message(partinfo, fp);
 239                 } else if (partinfo->mime_type == MIME_MESSAGE_RFC822) {
 240                         MimeInfo *sub;
 241
 242                         partinfo->sub = sub = procmime_scan_mime_header(fp);
 243                         if (!sub) break;
 244                         sub->level = partinfo->level + 1;
 245                         sub->parent = partinfo->parent;
 246                         sub->main = partinfo;
 247
 248                         if (sub->mime_type == MIME_MULTIPART) {
 249                                 if (sub->level < 8)
 250                                         procmime_scan_multipart_message
 251                                                 (sub, fp);
 252                         }
 253                 }
 254
 255                 /* look for next boundary */
 256                 buf[0] = '\0';
 257                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 258                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 259                                 if (buf[2 + boundary_len]     == '-' &&
 260                                     buf[2 + boundary_len + 1] == '-')
 261                                         eom = TRUE;
 262                                 break;
 263                         }
 264                 }
 265                 if (p == NULL)
 266                         eom = TRUE;     /* broken MIME message */
 267                 fpos = ftell(fp);
 268
 269                 partinfo->size = fpos - prev_fpos - strlen(buf);
 270
 271                 if (eom) break;
 272         }
 273         //g_message ("** at " __PRETTY_FUNCTION__ ":%d:", __LINE__);
 274 }
 275
 276 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 277 {
 278         gchar *buf;
 279
 280         Xalloca(buf, strlen(encoding) + 1, return);
 281         strcpy(buf, encoding);
 282
 283         g_free(mimeinfo->encoding);
 284
 285         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 286         if (!strcasecmp(buf, "7bit"))
 287                 mimeinfo->encoding_type = ENC_7BIT;
 288         else if (!strcasecmp(buf, "8bit"))
 289                 mimeinfo->encoding_type = ENC_8BIT;
 290         else if (!strcasecmp(buf, "quoted-printable"))
 291                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 292         else if (!strcasecmp(buf, "base64"))
 293                 mimeinfo->encoding_type = ENC_BASE64;
 294         else if (!strcasecmp(buf, "x-uuencode"))
 295                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 296         else
 297                 mimeinfo->encoding_type = ENC_UNKNOWN;
 298
 299 }
 300
 301 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 302 {
 303         gchar *delim, *p, *cnttype;
 304         gchar *buf;
 305
 306         Xalloca(buf, strlen(content_type) + 1, return);
 307         strcpy(buf, content_type);
 308
 309         g_free(mimeinfo->content_type);
 310         g_free(mimeinfo->charset);
 311         g_free(mimeinfo->name);
 312         mimeinfo->content_type = NULL;
 313         mimeinfo->charset      = NULL;
 314         mimeinfo->name         = NULL;
 315
 316         if ((delim = strchr(buf, ';'))) *delim = '\0';
 317         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 318
 319         if (!strncasecmp(cnttype, "text/html", 9))
 320                 mimeinfo->mime_type = MIME_TEXT_HTML;
 321         else if (!strncasecmp(cnttype, "text/", 5))
 322                 mimeinfo->mime_type = MIME_TEXT;
 323         else if (!strncasecmp(cnttype, "message/rfc822", 14))
 324                 mimeinfo->mime_type = MIME_MESSAGE_RFC822;
 325         else if (!strncasecmp(cnttype, "message/", 8))
 326                 mimeinfo->mime_type = MIME_TEXT;
 327         else if (!strncasecmp(cnttype, "application/octet-stream", 24))
 328                 mimeinfo->mime_type = MIME_APPLICATION_OCTET_STREAM;
 329         else if (!strncasecmp(cnttype, "application/", 12))
 330                 mimeinfo->mime_type = MIME_APPLICATION;
 331         else if (!strncasecmp(cnttype, "multipart/", 10))
 332                 mimeinfo->mime_type = MIME_MULTIPART;
 333         else if (!strncasecmp(cnttype, "image/", 6))
 334                 mimeinfo->mime_type = MIME_IMAGE;
 335         else if (!strncasecmp(cnttype, "audio/", 6))
 336                 mimeinfo->mime_type = MIME_AUDIO;
 337         else if (!strcasecmp(cnttype, "text"))
 338                 mimeinfo->mime_type = MIME_TEXT;
 339         else
 340                 mimeinfo->mime_type = MIME_UNKNOWN;
 341
 342         if (!delim) return;
 343         p = delim + 1;
 344
 345         for (;;) {
 346                 gchar *eq;
 347                 gchar *attr, *value;
 348
 349                 if ((delim = strchr(p, ';'))) *delim = '\0';
 350
 351                 if (!(eq = strchr(p, '='))) break;
 352
 353                 *eq = '\0';
 354                 attr = p;
 355                 g_strstrip(attr);
 356                 value = eq + 1;
 357                 g_strstrip(value);
 358
 359                 if (*value == '"')
 360                         extract_quote(value, '"');
 361                 else {
 362                         eliminate_parenthesis(value, '(', ')');
 363                         g_strstrip(value);
 364                 }
 365
 366                 if (*value) {
 367                         if (!strcasecmp(attr, "charset"))
 368                                 mimeinfo->charset = g_strdup(value);
 369                         else if (!strcasecmp(attr, "name")) {
 370                                 gchar *tmp;
 371                                 size_t len;
 372
 373                                 len = strlen(value) + 1;
 374                                 Xalloca(tmp, len, return);
 375                                 conv_unmime_header(tmp, len, value, NULL);
 376                                 mimeinfo->name = g_strdup(tmp);
 377                         } else if (!strcasecmp(attr, "boundary"))
 378                                 mimeinfo->boundary = g_strdup(value);
 379                 }
 380
 381                 if (!delim) break;
 382                 p = delim + 1;
 383         }
 384
 385         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 386                 mimeinfo->mime_type = MIME_TEXT;
 387 }
 388
 389 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 390                                        const gchar *content_disposition)
 391 {
 392         gchar *delim, *p, *dispos;
 393         gchar *buf;
 394
 395         Xalloca(buf, strlen(content_disposition) + 1, return);
 396         strcpy(buf, content_disposition);
 397
 398         if ((delim = strchr(buf, ';'))) *delim = '\0';
 399         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 400
 401         if (!delim) return;
 402         p = delim + 1;
 403
 404         for (;;) {
 405                 gchar *eq;
 406                 gchar *attr, *value;
 407
 408                 if ((delim = strchr(p, ';'))) *delim = '\0';
 409
 410                 if (!(eq = strchr(p, '='))) break;
 411
 412                 *eq = '\0';
 413                 attr = p;
 414                 g_strstrip(attr);
 415                 value = eq + 1;
 416                 g_strstrip(value);
 417
 418                 if (*value == '"')
 419                         extract_quote(value, '"');
 420                 else {
 421                         eliminate_parenthesis(value, '(', ')');
 422                         g_strstrip(value);
 423                 }
 424
 425                 if (*value) {
 426                         if (!strcasecmp(attr, "filename")) {
 427                                 gchar *tmp;
 428                                 size_t len;
 429
 430                                 len = strlen(value) + 1;
 431                                 Xalloca(tmp, len, return);
 432                                 conv_unmime_header(tmp, len, value, NULL);
 433                                 g_free(mimeinfo->filename);
 434                                 mimeinfo->filename = g_strdup(tmp);
 435                                 break;
 436                         }
 437                 }
 438
 439                 if (!delim) break;
 440                 p = delim + 1;
 441         }
 442 }
 443
 444 enum
 445 {
 446         H_CONTENT_TRANSFER_ENCODING = 0,
 447         H_CONTENT_TYPE              = 1,
 448         H_CONTENT_DISPOSITION       = 2
 449 };
 450
 451 MimeInfo *procmime_scan_mime_header(FILE *fp)
 452 {
 453         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 454                                                           NULL, FALSE},
 455                                        {"Content-Type:", NULL, TRUE},
 456                                        {"Content-Disposition:",
 457                                                           NULL, TRUE},
 458                                        {NULL,             NULL, FALSE}};
 459         gchar buf[BUFFSIZE];
 460         gint hnum;
 461         HeaderEntry *hp;
 462         MimeInfo *mimeinfo;
 463
 464         g_return_val_if_fail(fp != NULL, NULL);
 465
 466         mimeinfo = procmime_mimeinfo_new();
 467         mimeinfo->mime_type = MIME_TEXT;
 468         mimeinfo->encoding_type = ENC_7BIT;
 469         mimeinfo->fpos = ftell(fp);
 470
 471         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 472                != -1) {
 473                 hp = hentry + hnum;
 474
 475                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 476                         procmime_scan_encoding
 477                                 (mimeinfo, buf + strlen(hp->name));
 478                 } else if (H_CONTENT_TYPE == hnum) {
 479                         procmime_scan_content_type
 480                                 (mimeinfo, buf + strlen(hp->name));
 481                 } else if (H_CONTENT_DISPOSITION == hnum) {
 482                         procmime_scan_content_disposition
 483                                 (mimeinfo, buf + strlen(hp->name));
 484                 }
 485         }
 486
 487         if (!mimeinfo->content_type)
 488                 mimeinfo->content_type = g_strdup("text/plain");
 489
 490         return mimeinfo;
 491 }
 492
 493 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 494 {
 495         gchar buf[BUFFSIZE];
 496         gchar *boundary = NULL;
 497         gint boundary_len = 0;
 498         gboolean tmp_file = FALSE;
 499
 500         g_return_val_if_fail(infp != NULL, NULL);
 501         g_return_val_if_fail(mimeinfo != NULL, NULL);
 502
 503         if (!outfp) {
 504                 outfp = my_tmpfile();
 505                 if (!outfp) {
 506                         perror("tmpfile");
 507                         return NULL;
 508                 }
 509                 tmp_file = TRUE;
 510         }
 511
 512         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 513                 boundary = mimeinfo->parent->boundary;
 514                 boundary_len = strlen(boundary);
 515         }
 516
 517         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 518                 gboolean softline = FALSE;
 519
 520                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 521                        (!boundary ||
 522                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 523                         guchar *p = buf;
 524
 525                         softline = DoOneQPLine(&p, FALSE, softline);
 526                         fwrite(buf, p - (guchar *)buf, 1, outfp);
 527                 }
 528         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 529                 gchar outbuf[BUFFSIZE];
 530                 gint len;
 531                 Base64Decoder *decoder;
 532
 533                 decoder = base64_decoder_new();
 534                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 535                        (!boundary ||
 536                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 537                         len = base64_decoder_decode(decoder, buf, outbuf);
 538                         if (len < 0) {
 539                                 g_warning("Bad BASE64 content\n");
 540                                 break;
 541                         }
 542                         fwrite(outbuf, sizeof(gchar), len, outfp);
 543                 }
 544                 base64_decoder_free(decoder);
 545         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 546                 gchar outbuf[BUFFSIZE];
 547                 gint len;
 548                 gboolean flag = FALSE;
 549
 550                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 551                        (!boundary ||
 552                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 553                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 554
 555                         if (flag) {
 556                                 len = fromuutobits(outbuf, buf);
 557                                 if (len <= 0) {
 558                                         if (len < 0)
 559                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 560                                         break;
 561                                 }
 562                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 563                         } else
 564                                 flag = TRUE;
 565                 }
 566         } else {
 567                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 568                        (!boundary ||
 569                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 570                         fputs(buf, outfp);
 571                 }
 572         }
 573
 574         if (tmp_file) rewind(outfp);
 575         return outfp;
 576 }
 577
 578 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 579                        MimeInfo *mimeinfo)
 580 {
 581         FILE *infp, *outfp;
 582         gchar buf[BUFFSIZE];
 583
 584         g_return_val_if_fail(outfile != NULL, -1);
 585         g_return_val_if_fail(infile != NULL, -1);
 586         g_return_val_if_fail(mimeinfo != NULL, -1);
 587
 588         if ((infp = fopen(infile, "r")) == NULL) {
 589                 FILE_OP_ERROR(infile, "fopen");
 590                 return -1;
 591         }
 592         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 593                 FILE_OP_ERROR(infile, "fseek");
 594                 fclose(infp);
 595                 return -1;
 596         }
 597         if ((outfp = fopen(outfile, "w")) == NULL) {
 598                 FILE_OP_ERROR(outfile, "fopen");
 599                 fclose(infp);
 600                 return -1;
 601         }
 602
 603         while (fgets(buf, sizeof(buf), infp) != NULL)
 604                 if (buf[0] == '\r' || buf[0] == '\n') break;
 605
 606         procmime_decode_content(outfp, infp, mimeinfo);
 607
 608         fclose(infp);
 609         if (fclose(outfp) == EOF) {
 610                 FILE_OP_ERROR(outfile, "fclose");
 611                 unlink(outfile);
 612                 return -1;
 613         }
 614
 615         return 0;
 616 }
 617
 618 FILE *procmime_get_text_part(MsgInfo *msginfo)
 619 {
 620         FILE *infp, *tmpfp, *outfp;
 621         MimeInfo *mimeinfo, *partinfo = NULL;
 622         gchar *src_codeset;
 623         gboolean conv_fail = FALSE;
 624         gchar buf[BUFFSIZE];
 625
 626         g_return_val_if_fail(msginfo != NULL, NULL);
 627
 628         mimeinfo = procmime_scan_message(msginfo);
 629         if (!mimeinfo) return NULL;
 630
 631         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 632                 procmime_mimeinfo_free_all(mimeinfo);
 633                 return NULL;
 634         }
 635
 636         if (mimeinfo->mime_type == MIME_MULTIPART) {
 637                 partinfo = mimeinfo->children;
 638                 if (partinfo && partinfo->mime_type == MIME_TEXT) {
 639                         if (fseek(infp, partinfo->fpos, SEEK_SET) < 0) {
 640                                 perror("fseek");
 641                                 partinfo = NULL;
 642                         }
 643                 } else
 644                         partinfo = NULL;
 645         } else if (mimeinfo->mime_type == MIME_TEXT) {
 646                 partinfo = mimeinfo;
 647                 if (fseek(infp, partinfo->fpos, SEEK_SET) < 0) {
 648                         perror("fseek");
 649                         partinfo = NULL;
 650                 }
 651         }
 652
 653         if (!partinfo) {
 654                 procmime_mimeinfo_free_all(mimeinfo);
 655                 return NULL;
 656         }
 657
 658         while (fgets(buf, sizeof(buf), infp) != NULL)
 659                 if (buf[0] == '\r' || buf[0] == '\n') break;
 660
 661         tmpfp = procmime_decode_content(NULL, infp, partinfo);
 662         if (!tmpfp) {
 663                 procmime_mimeinfo_free_all(mimeinfo);
 664                 return NULL;
 665         }
 666
 667         if ((outfp = my_tmpfile()) == NULL) {
 668                 perror("tmpfile");
 669                 fclose(tmpfp);
 670                 procmime_mimeinfo_free_all(mimeinfo);
 671                 return NULL;
 672         }
 673
 674         src_codeset = prefs_common.force_charset
 675                 ? prefs_common.force_charset : partinfo->charset;
 676
 677         while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 678                 gchar *str;
 679
 680                 str = conv_codeset_strdup(buf, src_codeset, NULL);
 681                 if (str) {
 682                         fputs(str, outfp);
 683                         g_free(str);
 684                 } else {
 685                         conv_fail = TRUE;
 686                         fputs(buf, outfp);
 687                 }
 688         }
 689         if (conv_fail) g_warning(_("Code conversion failed.\n"));
 690
 691         fclose(tmpfp);
 692         procmime_mimeinfo_free_all(mimeinfo);
 693         rewind(outfp);
 694
 695         return outfp;
 696 }
 697
 698 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
 699 {
 700         static guint32 id = 0;
 701         gchar *base;
 702         gchar *filename;
 703         gchar f_prefix[10];
 704
 705         g_return_val_if_fail(mimeinfo != NULL, NULL);
 706
 707         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
 708
 709         if (MIME_TEXT_HTML == mimeinfo->mime_type)
 710                 base = "mimetmp.html";
 711         else {
 712                 base = mimeinfo->filename ? mimeinfo->filename
 713                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
 714                 base = g_basename(base);
 715                 if (*base == '\0') base = "mimetmp";
 716         }
 717
 718         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 719                                f_prefix, base, NULL);
 720
 721         return filename;
 722 }
 723
 724 static GList *mime_type_list = NULL;
 725
 726 gchar *procmime_get_mime_type(const gchar *filename)
 727 {
 728         static GHashTable *mime_type_table = NULL;
 729         MimeType *mime_type;
 730         const gchar *ext, *p;
 731
 732         if (!mime_type_table) {
 733                 mime_type_table = procmime_get_mime_type_table();
 734                 if (!mime_type_table) return NULL;
 735         }
 736
 737         filename = g_basename(filename);
 738         p = strrchr(filename, '.');
 739         if (p)
 740                 ext = p + 1;
 741         else
 742                 return NULL;
 743
 744         mime_type = g_hash_table_lookup(mime_type_table, ext);
 745         if (mime_type) {
 746                 gchar *str;
 747
 748                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
 749                                   NULL);
 750                 return str;
 751         }
 752
 753         return NULL;
 754 }
 755
 756 static guint procmime_str_hash(gconstpointer gptr)
 757 {
 758         guint hash_result = 0;
 759         const char *str;
 760
 761         for (str = gptr; str && *str; str++) {
 762                 if (isupper(*str)) hash_result += (*str + ' ');
 763                 else hash_result += *str;
 764         }
 765
 766         return hash_result;
 767 }
 768
 769 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
 770 {
 771         const char *str1 = gptr1;
 772         const char *str2 = gptr2;
 773
 774         return !strcasecmp(str1, str2);
 775 }
 776
 777 static GHashTable *procmime_get_mime_type_table(void)
 778 {
 779         GHashTable *table = NULL;
 780         GList *cur;
 781         MimeType *mime_type;
 782         gchar **exts;
 783
 784         if (!mime_type_list) {
 785                 mime_type_list = procmime_get_mime_type_list();
 786                 if (!mime_type_list) return NULL;
 787         }
 788
 789         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
 790
 791         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
 792                 gint i;
 793
 794                 mime_type = (MimeType *)cur->data;
 795
 796                 if (!mime_type->extension) continue;
 797
 798                 exts = g_strsplit(mime_type->extension, " ", 16);
 799                 for (i = 0; exts[i] != NULL; i++)
 800                         g_hash_table_insert(table, g_strdup(exts[i]),
 801                                             mime_type);
 802                 g_strfreev(exts);
 803         }
 804
 805         return table;
 806 }
 807
 808 static GList *procmime_get_mime_type_list(void)
 809 {
 810         GList *list = NULL;
 811         FILE *fp;
 812         gchar buf[BUFFSIZE];
 813         gchar *p, *delim;
 814         MimeType *mime_type;
 815
 816         if ((fp = fopen(SYSCONFDIR "/mime.types", "r")) == NULL) {
 817                 FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
 818                 return NULL;
 819         }
 820
 821         while (fgets(buf, sizeof(buf), fp) != NULL) {
 822                 p = strchr(buf, '#');
 823                 if (p) *p = '\0';
 824                 g_strstrip(buf);
 825
 826                 p = buf;
 827                 while (*p && !isspace(*p)) p++;
 828                 if (*p) {
 829                         *p = '\0';
 830                         p++;
 831                 }
 832                 delim = strchr(buf, '/');
 833                 if (delim == NULL) continue;
 834                 *delim = '\0';
 835
 836                 mime_type = g_new(MimeType, 1);
 837                 mime_type->type = g_strdup(buf);
 838                 mime_type->sub_type = g_strdup(delim + 1);
 839
 840                 while (*p && isspace(*p)) p++;
 841                 if (*p)
 842                         mime_type->extension = g_strdup(p);
 843                 else
 844                         mime_type->extension = NULL;
 845
 846                 list = g_list_append(list, mime_type);
 847         }
 848
 849         fclose(fp);
 850
 851         if (!list)
 852                 g_warning("Can't read mime.types\n");
 853
 854         return list;
 855 }
 856
 857 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
 858 {
 859         if (!charset)
 860                 return ENC_8BIT;
 861         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
 862                  !strcasecmp(charset, "US-ASCII"))
 863                 return ENC_7BIT;
 864         else
 865                 return ENC_8BIT;
 866                 /* return ENC_BASE64; */
 867                 /* return ENC_QUOTED_PRINTABLE; */
 868 }
 869
 870 const gchar *procmime_get_encoding_str(EncodingType encoding)
 871 {
 872         static const gchar *encoding_str[] = {
 873                 "7bit", "8bit", "quoted-printable", "base64", "x-uuencode",
 874                 NULL
 875         };
 876
 877         if (encoding >= ENC_7BIT && encoding <= ENC_UNKNOWN)
 878                 return encoding_str[encoding];
 879         else
 880                 return NULL;
 881 }