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
  48 MimeInfo *procmime_mimeinfo_new(void)
  49 {
  50         MimeInfo *mimeinfo;
  51
  52         mimeinfo = g_new0(MimeInfo, 1);
  53         mimeinfo->mime_type     = MIME_UNKNOWN;
  54         mimeinfo->encoding_type = ENC_UNKNOWN;
  55
  56         return mimeinfo;
  57 }
  58
  59 void procmime_mimeinfo_free(MimeInfo *mimeinfo)
  60 {
  61         if (!mimeinfo) return;
  62
  63         g_free(mimeinfo->encoding);
  64         g_free(mimeinfo->content_type);
  65         g_free(mimeinfo->charset);
  66         g_free(mimeinfo->name);
  67         g_free(mimeinfo->boundary);
  68         g_free(mimeinfo->content_disposition);
  69         g_free(mimeinfo->filename);
  70 #if USE_GPGME
  71         g_free(mimeinfo->plaintextfile);
  72         g_free(mimeinfo->sigstatus);
  73         g_free(mimeinfo->sigstatus_full);
  74 #endif
  75
  76         procmime_mimeinfo_free(mimeinfo->sub);
  77
  78         g_free(mimeinfo);
  79 }
  80
  81 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  82 {
  83         while (mimeinfo != NULL) {
  84                 MimeInfo *next;
  85
  86                 g_free(mimeinfo->encoding);
  87                 g_free(mimeinfo->content_type);
  88                 g_free(mimeinfo->charset);
  89                 g_free(mimeinfo->name);
  90                 g_free(mimeinfo->boundary);
  91                 g_free(mimeinfo->content_disposition);
  92                 g_free(mimeinfo->filename);
  93 #if USE_GPGME
  94                 g_free(mimeinfo->plaintextfile);
  95                 g_free(mimeinfo->sigstatus);
  96                 g_free(mimeinfo->sigstatus_full);
  97 #endif
  98
  99                 procmime_mimeinfo_free_all(mimeinfo->sub);
 100                 procmime_mimeinfo_free_all(mimeinfo->children);
 101 #if USE_GPGME
 102                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
 103 #endif
 104
 105                 next = mimeinfo->next;
 106                 g_free(mimeinfo);
 107                 mimeinfo = next;
 108         }
 109 }
 110
 111 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 112 {
 113         MimeInfo *child = parent->children;
 114
 115         if (!child)
 116                 parent->children = mimeinfo;
 117         else {
 118                 while (child->next != NULL)
 119                         child = child->next;
 120
 121                 child->next = mimeinfo;
 122         }
 123
 124         mimeinfo->parent = parent;
 125         mimeinfo->level = parent->level + 1;
 126
 127         return mimeinfo;
 128 }
 129
 130 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 131 {
 132         MimeInfo *parent = old->parent;
 133         MimeInfo *child;
 134
 135         if (!parent) {
 136                 g_warning("oops: Not top message");
 137                 return;
 138         }
 139         if (new->next) {
 140                 g_message("oops: new child should not have a sibling");
 141                 return;
 142         }
 143
 144         for (child = parent->children; child && child != old;
 145              child = child->next)
 146                 ;
 147         if (!child) {
 148                 g_warning("oops: parent can't find it's own child");
 149                 return;
 150         }
 151         procmime_mimeinfo_free_all(old);
 152
 153         if (child == parent->children) {
 154                 new->next = parent->children->next;
 155                 parent->children = new;
 156         } else {
 157                 new->next = child->next;
 158                 child = new;
 159         }
 160 }
 161
 162 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 163 {
 164         FILE *fp;
 165         MimeInfo *mimeinfo;
 166
 167         g_return_val_if_fail(msginfo != NULL, NULL);
 168
 169         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 170         mimeinfo = procmime_scan_mime_header(fp);
 171
 172         if (mimeinfo) {
 173                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 174                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 175                                 perror("fseek");
 176                 }
 177                 if (mimeinfo->mime_type != MIME_TEXT)
 178                         procmime_scan_multipart_message(mimeinfo, fp);
 179         }
 180
 181 #if USE_GPGME
 182         if (prefs_common.auto_check_signatures)
 183                 rfc2015_check_signature(mimeinfo, fp);
 184 #endif
 185         fclose(fp);
 186
 187         return mimeinfo;
 188 }
 189
 190 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 191 {
 192         gchar *p;
 193         gchar *boundary;
 194         gint boundary_len = 0;
 195         gchar buf[BUFFSIZE];
 196         glong fpos, prev_fpos;
 197         gint npart;
 198
 199         g_return_if_fail(mimeinfo != NULL);
 200         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 201
 202         if (mimeinfo->mime_type == MIME_MULTIPART) {
 203                 g_return_if_fail(mimeinfo->boundary != NULL);
 204                 g_return_if_fail(mimeinfo->sub == NULL);
 205         }
 206         g_return_if_fail(fp != NULL);
 207
 208         boundary = mimeinfo->boundary;
 209
 210         if (boundary) {
 211                 boundary_len = strlen(boundary);
 212
 213                 /* look for first boundary */
 214                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 215                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 216                 if (!p) return;
 217         }
 218
 219         if ((fpos = ftell(fp)) < 0) {
 220                 perror("ftell");
 221                 return;
 222         }
 223
 224         for (npart = 0;; npart++) {
 225                 MimeInfo *partinfo;
 226                 gboolean eom = FALSE;
 227
 228                 prev_fpos = fpos;
 229
 230                 partinfo = procmime_scan_mime_header(fp);
 231                 if (!partinfo) break;
 232                 procmime_mimeinfo_insert(mimeinfo, partinfo);
 233
 234                 if (partinfo->mime_type == MIME_MULTIPART) {
 235                         if (partinfo->level < 8)
 236                                 procmime_scan_multipart_message(partinfo, fp);
 237                 } else if (partinfo->mime_type == MIME_MESSAGE_RFC822) {
 238                         MimeInfo *sub;
 239
 240                         partinfo->sub = sub = procmime_scan_mime_header(fp);
 241                         if (!sub) break;
 242                         sub->level = partinfo->level + 1;
 243                         sub->parent = partinfo->parent;
 244                         sub->main = partinfo;
 245
 246                         if (sub->mime_type == MIME_MULTIPART) {
 247                                 if (sub->level < 8)
 248                                         procmime_scan_multipart_message
 249                                                 (sub, fp);
 250                         }
 251                 }
 252
 253                 /* look for next boundary */
 254                 buf[0] = '\0';
 255                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 256                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 257                                 if (buf[2 + boundary_len]     == '-' &&
 258                                     buf[2 + boundary_len + 1] == '-')
 259                                         eom = TRUE;
 260                                 break;
 261                         }
 262                 }
 263                 if (p == NULL)
 264                         eom = TRUE;     /* broken MIME message */
 265                 fpos = ftell(fp);
 266
 267                 partinfo->size = fpos - prev_fpos - strlen(buf);
 268
 269                 if (eom) break;
 270         }
 271         /*g_message ("** at " __PRETTY_FUNCTION__ ":%d:", __LINE__);*/
 272 }
 273
 274 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 275 {
 276         gchar *buf;
 277
 278         Xalloca(buf, strlen(encoding) + 1, return);
 279         strcpy(buf, encoding);
 280
 281         g_free(mimeinfo->encoding);
 282
 283         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 284         if (!strcasecmp(buf, "7bit"))
 285                 mimeinfo->encoding_type = ENC_7BIT;
 286         else if (!strcasecmp(buf, "8bit"))
 287                 mimeinfo->encoding_type = ENC_8BIT;
 288         else if (!strcasecmp(buf, "quoted-printable"))
 289                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 290         else if (!strcasecmp(buf, "base64"))
 291                 mimeinfo->encoding_type = ENC_BASE64;
 292         else if (!strcasecmp(buf, "x-uuencode"))
 293                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 294         else
 295                 mimeinfo->encoding_type = ENC_UNKNOWN;
 296
 297 }
 298
 299 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 300 {
 301         gchar *delim, *p, *cnttype;
 302         gchar *buf;
 303
 304         Xalloca(buf, strlen(content_type) + 1, return);
 305         strcpy(buf, content_type);
 306
 307         g_free(mimeinfo->content_type);
 308         g_free(mimeinfo->charset);
 309         g_free(mimeinfo->name);
 310         mimeinfo->content_type = NULL;
 311         mimeinfo->charset      = NULL;
 312         mimeinfo->name         = NULL;
 313
 314         if ((delim = strchr(buf, ';'))) *delim = '\0';
 315         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 316
 317         if (!strncasecmp(cnttype, "text/html", 9))
 318                 mimeinfo->mime_type = MIME_TEXT_HTML;
 319         else if (!strncasecmp(cnttype, "text/", 5))
 320                 mimeinfo->mime_type = MIME_TEXT;
 321         else if (!strncasecmp(cnttype, "message/rfc822", 14))
 322                 mimeinfo->mime_type = MIME_MESSAGE_RFC822;
 323         else if (!strncasecmp(cnttype, "message/", 8))
 324                 mimeinfo->mime_type = MIME_TEXT;
 325         else if (!strncasecmp(cnttype, "application/octet-stream", 24))
 326                 mimeinfo->mime_type = MIME_APPLICATION_OCTET_STREAM;
 327         else if (!strncasecmp(cnttype, "application/", 12))
 328                 mimeinfo->mime_type = MIME_APPLICATION;
 329         else if (!strncasecmp(cnttype, "multipart/", 10))
 330                 mimeinfo->mime_type = MIME_MULTIPART;
 331         else if (!strncasecmp(cnttype, "image/", 6))
 332                 mimeinfo->mime_type = MIME_IMAGE;
 333         else if (!strncasecmp(cnttype, "audio/", 6))
 334                 mimeinfo->mime_type = MIME_AUDIO;
 335         else if (!strcasecmp(cnttype, "text"))
 336                 mimeinfo->mime_type = MIME_TEXT;
 337         else
 338                 mimeinfo->mime_type = MIME_UNKNOWN;
 339
 340         if (!delim) return;
 341         p = delim + 1;
 342
 343         for (;;) {
 344                 gchar *eq;
 345                 gchar *attr, *value;
 346
 347                 if ((delim = strchr(p, ';'))) *delim = '\0';
 348
 349                 if (!(eq = strchr(p, '='))) break;
 350
 351                 *eq = '\0';
 352                 attr = p;
 353                 g_strstrip(attr);
 354                 value = eq + 1;
 355                 g_strstrip(value);
 356
 357                 if (*value == '"')
 358                         extract_quote(value, '"');
 359                 else {
 360                         eliminate_parenthesis(value, '(', ')');
 361                         g_strstrip(value);
 362                 }
 363
 364                 if (*value) {
 365                         if (!strcasecmp(attr, "charset"))
 366                                 mimeinfo->charset = g_strdup(value);
 367                         else if (!strcasecmp(attr, "name")) {
 368                                 gchar *tmp;
 369                                 size_t len;
 370
 371                                 len = strlen(value) + 1;
 372                                 Xalloca(tmp, len, return);
 373                                 conv_unmime_header(tmp, len, value, NULL);
 374                                 mimeinfo->name = g_strdup(tmp);
 375                         } else if (!strcasecmp(attr, "boundary"))
 376                                 mimeinfo->boundary = g_strdup(value);
 377                 }
 378
 379                 if (!delim) break;
 380                 p = delim + 1;
 381         }
 382
 383         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 384                 mimeinfo->mime_type = MIME_TEXT;
 385 }
 386
 387 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 388                                        const gchar *content_disposition)
 389 {
 390         gchar *delim, *p, *dispos;
 391         gchar *buf;
 392
 393         Xalloca(buf, strlen(content_disposition) + 1, return);
 394         strcpy(buf, content_disposition);
 395
 396         if ((delim = strchr(buf, ';'))) *delim = '\0';
 397         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 398
 399         if (!delim) return;
 400         p = delim + 1;
 401
 402         for (;;) {
 403                 gchar *eq;
 404                 gchar *attr, *value;
 405
 406                 if ((delim = strchr(p, ';'))) *delim = '\0';
 407
 408                 if (!(eq = strchr(p, '='))) break;
 409
 410                 *eq = '\0';
 411                 attr = p;
 412                 g_strstrip(attr);
 413                 value = eq + 1;
 414                 g_strstrip(value);
 415
 416                 if (*value == '"')
 417                         extract_quote(value, '"');
 418                 else {
 419                         eliminate_parenthesis(value, '(', ')');
 420                         g_strstrip(value);
 421                 }
 422
 423                 if (*value) {
 424                         if (!strcasecmp(attr, "filename")) {
 425                                 gchar *tmp;
 426                                 size_t len;
 427
 428                                 len = strlen(value) + 1;
 429                                 Xalloca(tmp, len, return);
 430                                 conv_unmime_header(tmp, len, value, NULL);
 431                                 g_free(mimeinfo->filename);
 432                                 mimeinfo->filename = g_strdup(tmp);
 433                                 break;
 434                         }
 435                 }
 436
 437                 if (!delim) break;
 438                 p = delim + 1;
 439         }
 440 }
 441
 442 enum
 443 {
 444         H_CONTENT_TRANSFER_ENCODING = 0,
 445         H_CONTENT_TYPE              = 1,
 446         H_CONTENT_DISPOSITION       = 2
 447 };
 448
 449 MimeInfo *procmime_scan_mime_header(FILE *fp)
 450 {
 451         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 452                                                           NULL, FALSE},
 453                                        {"Content-Type:", NULL, TRUE},
 454                                        {"Content-Disposition:",
 455                                                           NULL, TRUE},
 456                                        {NULL,             NULL, FALSE}};
 457         gchar buf[BUFFSIZE];
 458         gint hnum;
 459         HeaderEntry *hp;
 460         MimeInfo *mimeinfo;
 461
 462         g_return_val_if_fail(fp != NULL, NULL);
 463
 464         mimeinfo = procmime_mimeinfo_new();
 465         mimeinfo->mime_type = MIME_TEXT;
 466         mimeinfo->encoding_type = ENC_7BIT;
 467         mimeinfo->fpos = ftell(fp);
 468
 469         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 470                != -1) {
 471                 hp = hentry + hnum;
 472
 473                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 474                         procmime_scan_encoding
 475                                 (mimeinfo, buf + strlen(hp->name));
 476                 } else if (H_CONTENT_TYPE == hnum) {
 477                         procmime_scan_content_type
 478                                 (mimeinfo, buf + strlen(hp->name));
 479                 } else if (H_CONTENT_DISPOSITION == hnum) {
 480                         procmime_scan_content_disposition
 481                                 (mimeinfo, buf + strlen(hp->name));
 482                 }
 483         }
 484
 485         if (!mimeinfo->content_type)
 486                 mimeinfo->content_type = g_strdup("text/plain");
 487
 488         return mimeinfo;
 489 }
 490
 491 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 492 {
 493         gchar buf[BUFFSIZE];
 494         gchar *boundary = NULL;
 495         gint boundary_len = 0;
 496         gboolean tmp_file = FALSE;
 497
 498         g_return_val_if_fail(infp != NULL, NULL);
 499         g_return_val_if_fail(mimeinfo != NULL, NULL);
 500
 501         if (!outfp) {
 502                 outfp = my_tmpfile();
 503                 if (!outfp) {
 504                         perror("tmpfile");
 505                         return NULL;
 506                 }
 507                 tmp_file = TRUE;
 508         }
 509
 510         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 511                 boundary = mimeinfo->parent->boundary;
 512                 boundary_len = strlen(boundary);
 513         }
 514
 515         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 516                 gboolean softline = FALSE;
 517
 518                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 519                        (!boundary ||
 520                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 521                         guchar *p = buf;
 522
 523                         softline = DoOneQPLine(&p, FALSE, softline);
 524                         fwrite(buf, p - (guchar *)buf, 1, outfp);
 525                 }
 526         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 527                 gchar outbuf[BUFFSIZE];
 528                 gint len;
 529                 Base64Decoder *decoder;
 530
 531                 decoder = base64_decoder_new();
 532                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 533                        (!boundary ||
 534                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 535                         len = base64_decoder_decode(decoder, buf, outbuf);
 536                         if (len < 0) {
 537                                 g_warning("Bad BASE64 content\n");
 538                                 break;
 539                         }
 540                         fwrite(outbuf, sizeof(gchar), len, outfp);
 541                 }
 542                 base64_decoder_free(decoder);
 543         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 544                 gchar outbuf[BUFFSIZE];
 545                 gint len;
 546                 gboolean flag = FALSE;
 547
 548                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 549                        (!boundary ||
 550                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 551                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 552
 553                         if (flag) {
 554                                 len = fromuutobits(outbuf, buf);
 555                                 if (len <= 0) {
 556                                         if (len < 0)
 557                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 558                                         break;
 559                                 }
 560                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 561                         } else
 562                                 flag = TRUE;
 563                 }
 564         } else {
 565                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 566                        (!boundary ||
 567                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 568                         fputs(buf, outfp);
 569                 }
 570         }
 571
 572         if (tmp_file) rewind(outfp);
 573         return outfp;
 574 }
 575
 576 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 577                        MimeInfo *mimeinfo)
 578 {
 579         FILE *infp, *outfp;
 580         gchar buf[BUFFSIZE];
 581
 582         g_return_val_if_fail(outfile != NULL, -1);
 583         g_return_val_if_fail(infile != NULL, -1);
 584         g_return_val_if_fail(mimeinfo != NULL, -1);
 585
 586         if ((infp = fopen(infile, "r")) == NULL) {
 587                 FILE_OP_ERROR(infile, "fopen");
 588                 return -1;
 589         }
 590         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 591                 FILE_OP_ERROR(infile, "fseek");
 592                 fclose(infp);
 593                 return -1;
 594         }
 595         if ((outfp = fopen(outfile, "w")) == NULL) {
 596                 FILE_OP_ERROR(outfile, "fopen");
 597                 fclose(infp);
 598                 return -1;
 599         }
 600
 601         while (fgets(buf, sizeof(buf), infp) != NULL)
 602                 if (buf[0] == '\r' || buf[0] == '\n') break;
 603
 604         procmime_decode_content(outfp, infp, mimeinfo);
 605
 606         fclose(infp);
 607         if (fclose(outfp) == EOF) {
 608                 FILE_OP_ERROR(outfile, "fclose");
 609                 unlink(outfile);
 610                 return -1;
 611         }
 612
 613         return 0;
 614 }
 615
 616 FILE *procmime_get_text_part(MsgInfo *msginfo)
 617 {
 618         FILE *infp, *tmpfp, *outfp;
 619         MimeInfo *mimeinfo, *partinfo = NULL;
 620         gchar *src_codeset;
 621         gboolean conv_fail = FALSE;
 622         gchar buf[BUFFSIZE];
 623
 624         g_return_val_if_fail(msginfo != NULL, NULL);
 625
 626         mimeinfo = procmime_scan_message(msginfo);
 627         if (!mimeinfo) return NULL;
 628
 629         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 630                 procmime_mimeinfo_free_all(mimeinfo);
 631                 return NULL;
 632         }
 633
 634         if (mimeinfo->mime_type == MIME_MULTIPART) {
 635                 partinfo = mimeinfo->children;
 636                 if (partinfo && partinfo->mime_type == MIME_TEXT) {
 637                         if (fseek(infp, partinfo->fpos, SEEK_SET) < 0) {
 638                                 perror("fseek");
 639                                 partinfo = NULL;
 640                         }
 641                 } else
 642                         partinfo = NULL;
 643         } else if (mimeinfo->mime_type == MIME_TEXT) {
 644                 partinfo = mimeinfo;
 645                 if (fseek(infp, partinfo->fpos, SEEK_SET) < 0) {
 646                         perror("fseek");
 647                         partinfo = NULL;
 648                 }
 649         }
 650
 651         if (!partinfo) {
 652                 procmime_mimeinfo_free_all(mimeinfo);
 653                 return NULL;
 654         }
 655
 656         while (fgets(buf, sizeof(buf), infp) != NULL)
 657                 if (buf[0] == '\r' || buf[0] == '\n') break;
 658
 659         tmpfp = procmime_decode_content(NULL, infp, partinfo);
 660         if (!tmpfp) {
 661                 procmime_mimeinfo_free_all(mimeinfo);
 662                 return NULL;
 663         }
 664
 665         if ((outfp = my_tmpfile()) == NULL) {
 666                 perror("tmpfile");
 667                 fclose(tmpfp);
 668                 procmime_mimeinfo_free_all(mimeinfo);
 669                 return NULL;
 670         }
 671
 672         src_codeset = prefs_common.force_charset
 673                 ? prefs_common.force_charset : partinfo->charset;
 674
 675         while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 676                 gchar *str;
 677
 678                 str = conv_codeset_strdup(buf, src_codeset, NULL);
 679                 if (str) {
 680                         fputs(str, outfp);
 681                         g_free(str);
 682                 } else {
 683                         conv_fail = TRUE;
 684                         fputs(buf, outfp);
 685                 }
 686         }
 687         if (conv_fail) g_warning(_("Code conversion failed.\n"));
 688
 689         fclose(tmpfp);
 690         procmime_mimeinfo_free_all(mimeinfo);
 691         rewind(outfp);
 692
 693         return outfp;
 694 }
 695
 696 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
 697 {
 698         static guint32 id = 0;
 699         gchar *base;
 700         gchar *filename;
 701         gchar f_prefix[10];
 702
 703         g_return_val_if_fail(mimeinfo != NULL, NULL);
 704
 705         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
 706
 707         if (MIME_TEXT_HTML == mimeinfo->mime_type)
 708                 base = "mimetmp.html";
 709         else {
 710                 base = mimeinfo->filename ? mimeinfo->filename
 711                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
 712                 base = g_basename(base);
 713                 if (*base == '\0') base = "mimetmp";
 714         }
 715
 716         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
 717                                f_prefix, base, NULL);
 718
 719         return filename;
 720 }
 721
 722 static GList *mime_type_list = NULL;
 723
 724 gchar *procmime_get_mime_type(const gchar *filename)
 725 {
 726         static GHashTable *mime_type_table = NULL;
 727         MimeType *mime_type;
 728         const gchar *ext, *p;
 729
 730         if (!mime_type_table) {
 731                 mime_type_table = procmime_get_mime_type_table();
 732                 if (!mime_type_table) return NULL;
 733         }
 734
 735         filename = g_basename(filename);
 736         p = strrchr(filename, '.');
 737         if (p)
 738                 ext = p + 1;
 739         else
 740                 return NULL;
 741
 742         mime_type = g_hash_table_lookup(mime_type_table, ext);
 743         if (mime_type) {
 744                 gchar *str;
 745
 746                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
 747                                   NULL);
 748                 return str;
 749         }
 750
 751         return NULL;
 752 }
 753
 754 static guint procmime_str_hash(gconstpointer gptr)
 755 {
 756         guint hash_result = 0;
 757         const char *str;
 758
 759         for (str = gptr; str && *str; str++) {
 760                 if (isupper(*str)) hash_result += (*str + ' ');
 761                 else hash_result += *str;
 762         }
 763
 764         return hash_result;
 765 }
 766
 767 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
 768 {
 769         const char *str1 = gptr1;
 770         const char *str2 = gptr2;
 771
 772         return !strcasecmp(str1, str2);
 773 }
 774
 775 static GHashTable *procmime_get_mime_type_table(void)
 776 {
 777         GHashTable *table = NULL;
 778         GList *cur;
 779         MimeType *mime_type;
 780         gchar **exts;
 781
 782         if (!mime_type_list) {
 783                 mime_type_list = procmime_get_mime_type_list();
 784                 if (!mime_type_list) return NULL;
 785         }
 786
 787         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
 788
 789         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
 790                 gint i;
 791
 792                 mime_type = (MimeType *)cur->data;
 793
 794                 if (!mime_type->extension) continue;
 795
 796                 exts = g_strsplit(mime_type->extension, " ", 16);
 797                 for (i = 0; exts[i] != NULL; i++)
 798                         g_hash_table_insert(table, g_strdup(exts[i]),
 799                                             mime_type);
 800                 g_strfreev(exts);
 801         }
 802
 803         return table;
 804 }
 805
 806 GList *procmime_get_mime_type_list(void)
 807 {
 808         GList *list = NULL;
 809         FILE *fp;
 810         gchar buf[BUFFSIZE];
 811         gchar *p, *delim;
 812         MimeType *mime_type;
 813
 814         if (mime_type_list)
 815                 return mime_type_list;
 816
 817         if ((fp = fopen(SYSCONFDIR "/mime.types", "r")) == NULL) {
 818                 FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
 819                 return NULL;
 820         }
 821
 822         while (fgets(buf, sizeof(buf), fp) != NULL) {
 823                 p = strchr(buf, '#');
 824                 if (p) *p = '\0';
 825                 g_strstrip(buf);
 826
 827                 p = buf;
 828                 while (*p && !isspace(*p)) p++;
 829                 if (*p) {
 830                         *p = '\0';
 831                         p++;
 832                 }
 833                 delim = strchr(buf, '/');
 834                 if (delim == NULL) continue;
 835                 *delim = '\0';
 836
 837                 mime_type = g_new(MimeType, 1);
 838                 mime_type->type = g_strdup(buf);
 839                 mime_type->sub_type = g_strdup(delim + 1);
 840
 841                 while (*p && isspace(*p)) p++;
 842                 if (*p)
 843                         mime_type->extension = g_strdup(p);
 844                 else
 845                         mime_type->extension = NULL;
 846
 847                 list = g_list_append(list, mime_type);
 848         }
 849
 850         fclose(fp);
 851
 852         if (!list)
 853                 g_warning("Can't read mime.types\n");
 854
 855         return list;
 856 }
 857
 858 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
 859 {
 860         if (!charset)
 861                 return ENC_8BIT;
 862         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
 863                  !strcasecmp(charset, "US-ASCII"))
 864                 return ENC_7BIT;
 865         else
 866                 return ENC_8BIT;
 867                 /* return ENC_BASE64; */
 868                 /* return ENC_QUOTED_PRINTABLE; */
 869 }
 870
 871 const gchar *procmime_get_encoding_str(EncodingType encoding)
 872 {
 873         static const gchar *encoding_str[] = {
 874                 "7bit", "8bit", "quoted-printable", "base64", "x-uuencode",
 875                 NULL
 876         };
 877
 878         if (encoding >= ENC_7BIT && encoding <= ENC_UNKNOWN)
 879                 return encoding_str[encoding];
 880         else
 881                 return NULL;
 882 }