src/procmime.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <locale.h>
  30 #include <ctype.h>
  31
  32 #include "intl.h"
  33 #include "procmime.h"
  34 #include "procheader.h"
  35 #include "base64.h"
  36 #include "uuencode.h"
  37 #include "unmime.h"
  38 #include "html.h"
  39 #include "enriched.h"
  40 #include "codeconv.h"
  41 #include "utils.h"
  42 #include "prefs_common.h"
  43
  44 #if USE_GPGME
  45 #  include "rfc2015.h"
  46 #endif
  47
  48 #include "prefs.h"
  49
  50 static GHashTable *procmime_get_mime_type_table (void);
  51
  52 MimeInfo *procmime_mimeinfo_new(void)
  53 {
  54         MimeInfo *mimeinfo;
  55
  56         mimeinfo = g_new0(MimeInfo, 1);
  57         mimeinfo->mime_type     = MIME_UNKNOWN;
  58         mimeinfo->encoding_type = ENC_UNKNOWN;
  59
  60         return mimeinfo;
  61 }
  62
  63 void procmime_mimeinfo_free(MimeInfo *mimeinfo)
  64 {
  65         if (!mimeinfo) return;
  66
  67         g_free(mimeinfo->encoding);
  68         g_free(mimeinfo->content_type);
  69         g_free(mimeinfo->charset);
  70         g_free(mimeinfo->name);
  71         g_free(mimeinfo->boundary);
  72         g_free(mimeinfo->content_disposition);
  73         g_free(mimeinfo->filename);
  74 #if USE_GPGME
  75         g_free(mimeinfo->plaintextfile);
  76         g_free(mimeinfo->sigstatus);
  77         g_free(mimeinfo->sigstatus_full);
  78 #endif
  79
  80         procmime_mimeinfo_free(mimeinfo->sub);
  81
  82         g_free(mimeinfo);
  83 }
  84
  85 void procmime_mimeinfo_free_all(MimeInfo *mimeinfo)
  86 {
  87         while (mimeinfo != NULL) {
  88                 MimeInfo *next;
  89
  90                 g_free(mimeinfo->encoding);
  91                 g_free(mimeinfo->content_type);
  92                 g_free(mimeinfo->charset);
  93                 g_free(mimeinfo->name);
  94                 g_free(mimeinfo->boundary);
  95                 g_free(mimeinfo->content_disposition);
  96                 g_free(mimeinfo->filename);
  97 #if USE_GPGME
  98                 g_free(mimeinfo->plaintextfile);
  99                 g_free(mimeinfo->sigstatus);
 100                 g_free(mimeinfo->sigstatus_full);
 101 #endif
 102
 103                 procmime_mimeinfo_free_all(mimeinfo->sub);
 104                 procmime_mimeinfo_free_all(mimeinfo->children);
 105 #if USE_GPGME
 106                 procmime_mimeinfo_free_all(mimeinfo->plaintext);
 107 #endif
 108
 109                 next = mimeinfo->next;
 110                 g_free(mimeinfo);
 111                 mimeinfo = next;
 112         }
 113 }
 114
 115 MimeInfo *procmime_mimeinfo_insert(MimeInfo *parent, MimeInfo *mimeinfo)
 116 {
 117         MimeInfo *child = parent->children;
 118
 119         if (!child)
 120                 parent->children = mimeinfo;
 121         else {
 122                 while (child->next != NULL)
 123                         child = child->next;
 124
 125                 child->next = mimeinfo;
 126         }
 127
 128         mimeinfo->parent = parent;
 129         mimeinfo->level = parent->level + 1;
 130
 131         return mimeinfo;
 132 }
 133
 134 void procmime_mimeinfo_replace(MimeInfo *old, MimeInfo *new)
 135 {
 136         MimeInfo *parent = old->parent;
 137         MimeInfo *child;
 138
 139         g_return_if_fail(parent != NULL);
 140         g_return_if_fail(new->next == NULL);
 141
 142         for (child = parent->children; child && child != old;
 143              child = child->next)
 144                 ;
 145         if (!child) {
 146                 g_warning("oops: parent can't find it's own child");
 147                 return;
 148         }
 149         procmime_mimeinfo_free_all(old);
 150
 151         if (child == parent->children) {
 152                 new->next = parent->children->next;
 153                 parent->children = new;
 154         } else {
 155                 new->next = child->next;
 156                 child = new;
 157         }
 158 }
 159
 160 MimeInfo *procmime_mimeinfo_next(MimeInfo *mimeinfo)
 161 {
 162         if (!mimeinfo) return NULL;
 163
 164         if (mimeinfo->children)
 165                 return mimeinfo->children;
 166         if (mimeinfo->sub)
 167                 return mimeinfo->sub;
 168         if (mimeinfo->next)
 169                 return mimeinfo->next;
 170
 171         for (mimeinfo = mimeinfo->parent; mimeinfo != NULL;
 172              mimeinfo = mimeinfo->parent) {
 173                 if (mimeinfo->next)
 174                         return mimeinfo->next;
 175                 if (mimeinfo->main) {
 176                         mimeinfo = mimeinfo->main;
 177                         if (mimeinfo->next)
 178                                 return mimeinfo->next;
 179                 }
 180         }
 181
 182         return NULL;
 183 }
 184
 185 MimeInfo *procmime_scan_message(MsgInfo *msginfo)
 186 {
 187         FILE *fp;
 188         MimeInfo *mimeinfo;
 189
 190         g_return_val_if_fail(msginfo != NULL, NULL);
 191
 192         if ((fp = procmsg_open_message(msginfo)) == NULL) return NULL;
 193         mimeinfo = procmime_scan_mime_header(fp, MIME_TEXT);
 194
 195         if (mimeinfo) {
 196                 if (mimeinfo->mime_type != MIME_MULTIPART) {
 197                         if (fseek(fp, mimeinfo->fpos, SEEK_SET) < 0)
 198                                 perror("fseek");
 199                 }
 200                 if (mimeinfo->mime_type != MIME_TEXT)
 201                         procmime_scan_multipart_message(mimeinfo, fp);
 202         }
 203
 204 #if USE_GPGME
 205         if (prefs_common.auto_check_signatures)
 206                 rfc2015_check_signature(mimeinfo, fp);
 207 #endif
 208         fclose(fp);
 209
 210         return mimeinfo;
 211 }
 212
 213 void procmime_scan_multipart_message(MimeInfo *mimeinfo, FILE *fp)
 214 {
 215         gchar *p;
 216         gchar *boundary;
 217         gint boundary_len = 0;
 218         gchar buf[BUFFSIZE];
 219         glong fpos, prev_fpos;
 220         gint npart;
 221         ContentType default_type;
 222
 223         g_return_if_fail(mimeinfo != NULL);
 224         g_return_if_fail(mimeinfo->mime_type != MIME_TEXT);
 225
 226         if (mimeinfo->mime_type == MIME_MULTIPART) {
 227                 g_return_if_fail(mimeinfo->boundary != NULL);
 228                 g_return_if_fail(mimeinfo->sub == NULL);
 229         }
 230         g_return_if_fail(fp != NULL);
 231
 232         boundary = mimeinfo->boundary;
 233
 234         if (boundary) {
 235                 boundary_len = strlen(boundary);
 236
 237                 /* look for first boundary */
 238                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL)
 239                         if (IS_BOUNDARY(buf, boundary, boundary_len)) break;
 240                 if (!p) return;
 241         }
 242
 243         if ((fpos = ftell(fp)) < 0) {
 244                 perror("ftell");
 245                 return;
 246         }
 247
 248         /* Sets default subpart type for multipart/digest */
 249         if (!strncasecmp(mimeinfo->content_type, "multipart/digest", 16))
 250                 default_type = MIME_MESSAGE_RFC822;
 251         else
 252                 default_type = MIME_TEXT;
 253
 254         for (npart = 0;; npart++) {
 255                 MimeInfo *partinfo;
 256                 gboolean eom = FALSE;
 257
 258                 prev_fpos = fpos;
 259
 260                 partinfo = procmime_scan_mime_header(fp, default_type);
 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
 271                                               (fp, MIME_TEXT);
 272                         if (!sub) break;
 273                         sub->level = partinfo->level + 1;
 274                         sub->parent = partinfo;
 275                         sub->main = partinfo;
 276
 277                         if (sub->mime_type == MIME_MULTIPART) {
 278                                 if (sub->level < 8)
 279                                         procmime_scan_multipart_message
 280                                                 (sub, fp);
 281                         }
 282                 }
 283
 284                 /* look for next boundary */
 285                 buf[0] = '\0';
 286                 while ((p = fgets(buf, sizeof(buf), fp)) != NULL) {
 287                         if (IS_BOUNDARY(buf, boundary, boundary_len)) {
 288                                 if (buf[2 + boundary_len]     == '-' &&
 289                                     buf[2 + boundary_len + 1] == '-')
 290                                         eom = TRUE;
 291                                 break;
 292                         }
 293                 }
 294                 if (p == NULL)
 295                         eom = TRUE;     /* broken MIME message */
 296                 fpos = ftell(fp);
 297
 298                 partinfo->size = fpos - prev_fpos - strlen(buf);
 299
 300                 if (eom) break;
 301         }
 302 }
 303
 304 void procmime_scan_encoding(MimeInfo *mimeinfo, const gchar *encoding)
 305 {
 306         gchar *buf;
 307
 308         Xstrdup_a(buf, encoding, return);
 309
 310         g_free(mimeinfo->encoding);
 311
 312         mimeinfo->encoding = g_strdup(g_strstrip(buf));
 313         if (!strcasecmp(buf, "7bit"))
 314                 mimeinfo->encoding_type = ENC_7BIT;
 315         else if (!strcasecmp(buf, "8bit"))
 316                 mimeinfo->encoding_type = ENC_8BIT;
 317         else if (!strcasecmp(buf, "quoted-printable"))
 318                 mimeinfo->encoding_type = ENC_QUOTED_PRINTABLE;
 319         else if (!strcasecmp(buf, "base64"))
 320                 mimeinfo->encoding_type = ENC_BASE64;
 321         else if (!strcasecmp(buf, "x-uuencode"))
 322                 mimeinfo->encoding_type = ENC_X_UUENCODE;
 323         else
 324                 mimeinfo->encoding_type = ENC_UNKNOWN;
 325
 326 }
 327
 328 void procmime_scan_content_type(MimeInfo *mimeinfo, const gchar *content_type)
 329 {
 330         gchar *delim, *p, *cnttype;
 331         gchar *buf;
 332
 333         if (conv_get_current_charset() == C_EUC_JP &&
 334             strchr(content_type, '\033')) {
 335                 gint len;
 336                 len = strlen(content_type) * 2 + 1;
 337                 Xalloca(buf, len, return);
 338                 conv_jistoeuc(buf, len, content_type);
 339         } else
 340                 Xstrdup_a(buf, content_type, return);
 341
 342         g_free(mimeinfo->content_type);
 343         g_free(mimeinfo->charset);
 344         /* g_free(mimeinfo->name); */
 345         mimeinfo->content_type = NULL;
 346         mimeinfo->charset      = NULL;
 347         /* mimeinfo->name      = NULL; */
 348
 349         if ((delim = strchr(buf, ';'))) *delim = '\0';
 350         mimeinfo->content_type = cnttype = g_strdup(g_strstrip(buf));
 351
 352         mimeinfo->mime_type = procmime_scan_mime_type(cnttype);
 353
 354         if (!delim) return;
 355         p = delim + 1;
 356
 357         for (;;) {
 358                 gchar *eq;
 359                 gchar *attr, *value;
 360
 361                 if ((delim = strchr(p, ';'))) *delim = '\0';
 362
 363                 if (!(eq = strchr(p, '='))) break;
 364
 365                 *eq = '\0';
 366                 attr = p;
 367                 g_strstrip(attr);
 368                 value = eq + 1;
 369                 g_strstrip(value);
 370
 371                 if (*value == '"')
 372                         extract_quote(value, '"');
 373                 else {
 374                         eliminate_parenthesis(value, '(', ')');
 375                         g_strstrip(value);
 376                 }
 377
 378                 if (*value) {
 379                         if (!strcasecmp(attr, "charset"))
 380                                 mimeinfo->charset = g_strdup(value);
 381                         else if (!strcasecmp(attr, "name")) {
 382                                 gchar *tmp;
 383                                 size_t len;
 384
 385                                 len = strlen(value) + 1;
 386                                 Xalloca(tmp, len, return);
 387                                 conv_unmime_header(tmp, len, value, NULL);
 388                                 g_free(mimeinfo->name);
 389                                 mimeinfo->name = g_strdup(tmp);
 390                         } else if (!strcasecmp(attr, "boundary"))
 391                                 mimeinfo->boundary = g_strdup(value);
 392                 }
 393
 394                 if (!delim) break;
 395                 p = delim + 1;
 396         }
 397
 398         if (mimeinfo->mime_type == MIME_MULTIPART && !mimeinfo->boundary)
 399                 mimeinfo->mime_type = MIME_TEXT;
 400 }
 401
 402 void procmime_scan_content_disposition(MimeInfo *mimeinfo,
 403                                        const gchar *content_disposition)
 404 {
 405         gchar *delim, *p, *dispos;
 406         gchar *buf;
 407
 408         if (conv_get_current_charset() == C_EUC_JP &&
 409             strchr(content_disposition, '\033')) {
 410                 gint len;
 411                 len = strlen(content_disposition) * 2 + 1;
 412                 Xalloca(buf, len, return);
 413                 conv_jistoeuc(buf, len, content_disposition);
 414         } else
 415                 Xstrdup_a(buf, content_disposition, return);
 416
 417         if ((delim = strchr(buf, ';'))) *delim = '\0';
 418         mimeinfo->content_disposition = dispos = g_strdup(g_strstrip(buf));
 419
 420         if (!delim) return;
 421         p = delim + 1;
 422
 423         for (;;) {
 424                 gchar *eq;
 425                 gchar *attr, *value;
 426
 427                 if ((delim = strchr(p, ';'))) *delim = '\0';
 428
 429                 if (!(eq = strchr(p, '='))) break;
 430
 431                 *eq = '\0';
 432                 attr = p;
 433                 g_strstrip(attr);
 434                 value = eq + 1;
 435                 g_strstrip(value);
 436
 437                 if (*value == '"')
 438                         extract_quote(value, '"');
 439                 else {
 440                         eliminate_parenthesis(value, '(', ')');
 441                         g_strstrip(value);
 442                 }
 443
 444                 if (*value) {
 445                         if (!strcasecmp(attr, "filename")) {
 446                                 gchar *tmp;
 447                                 size_t len;
 448
 449                                 len = strlen(value) + 1;
 450                                 Xalloca(tmp, len, return);
 451                                 conv_unmime_header(tmp, len, value, NULL);
 452                                 g_free(mimeinfo->filename);
 453                                 mimeinfo->filename = g_strdup(tmp);
 454                                 break;
 455                         }
 456                 }
 457
 458                 if (!delim) break;
 459                 p = delim + 1;
 460         }
 461 }
 462
 463 void procmime_scan_content_description(MimeInfo *mimeinfo,
 464                                        const gchar *content_description)
 465 {
 466         gchar *delim, *p, *dispos;
 467         gchar *buf;
 468
 469         gchar *tmp;
 470         size_t blen;
 471
 472         if (conv_get_current_charset() == C_EUC_JP &&
 473             strchr(content_description, '\033')) {
 474                 gint len;
 475                 len = strlen(content_description) * 2 + 1;
 476                 Xalloca(buf, len, return);
 477                 conv_jistoeuc(buf, len, content_description);
 478         } else
 479                 Xstrdup_a(buf, content_description, return);
 480
 481         blen = strlen(buf) + 1;
 482         Xalloca(tmp, blen, return);
 483         conv_unmime_header(tmp, blen, buf, NULL);
 484         g_free(mimeinfo->name);
 485         mimeinfo->name = g_strdup(tmp);
 486 }
 487
 488 void procmime_scan_subject(MimeInfo *mimeinfo,
 489                            const gchar *subject)
 490 {
 491         gchar *delim, *p, *dispos;
 492         gchar *buf;
 493
 494         gchar *tmp;
 495         size_t blen;
 496
 497         if (conv_get_current_charset() == C_EUC_JP &&
 498             strchr(subject, '\033')) {
 499                 gint len;
 500                 len = strlen(subject) * 2 + 1;
 501                 Xalloca(buf, len, return);
 502                 conv_jistoeuc(buf, len, subject);
 503         } else
 504                 Xstrdup_a(buf, subject, return);
 505
 506         blen = strlen(buf) + 1;
 507         Xalloca(tmp, blen, return);
 508         conv_unmime_header(tmp, blen, buf, NULL);
 509         g_free(mimeinfo->name);
 510         mimeinfo->name = g_strdup(tmp);
 511 }
 512
 513 enum
 514 {
 515         H_CONTENT_TRANSFER_ENCODING = 0,
 516         H_CONTENT_TYPE              = 1,
 517         H_CONTENT_DISPOSITION       = 2,
 518         H_CONTENT_DESCRIPTION       = 3,
 519         H_SUBJECT                   = 4
 520 };
 521
 522 MimeInfo *procmime_scan_mime_header(FILE *fp, ContentType default_type)
 523 {
 524         static HeaderEntry hentry[] = {{"Content-Transfer-Encoding:",
 525                                                           NULL, FALSE},
 526                                        {"Content-Type:", NULL, TRUE},
 527                                        {"Content-Disposition:",
 528                                                           NULL, TRUE},
 529                                        {"Content-description:",
 530                                                           NULL, TRUE},
 531                                        {"Subject:",
 532                                                           NULL, TRUE},
 533                                        {NULL,             NULL, FALSE}};
 534         gchar buf[BUFFSIZE];
 535         gint hnum;
 536         HeaderEntry *hp;
 537         MimeInfo *mimeinfo;
 538
 539         g_return_val_if_fail(fp != NULL, NULL);
 540
 541         mimeinfo = procmime_mimeinfo_new();
 542         /* Needed for multipart/digest */
 543         mimeinfo->mime_type = default_type;
 544         mimeinfo->encoding_type = ENC_7BIT;
 545         mimeinfo->fpos = ftell(fp);
 546
 547         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 548                != -1) {
 549                 hp = hentry + hnum;
 550
 551                 if (H_CONTENT_TRANSFER_ENCODING == hnum) {
 552                         procmime_scan_encoding
 553                                 (mimeinfo, buf + strlen(hp->name));
 554                 } else if (H_CONTENT_TYPE == hnum) {
 555                         procmime_scan_content_type
 556                                 (mimeinfo, buf + strlen(hp->name));
 557                 } else if (H_CONTENT_DISPOSITION == hnum) {
 558                         procmime_scan_content_disposition
 559                                 (mimeinfo, buf + strlen(hp->name));
 560                 } else if (H_CONTENT_DESCRIPTION == hnum) {
 561                         procmime_scan_content_description
 562                                 (mimeinfo, buf + strlen(hp->name));
 563                 } else if (H_SUBJECT == hnum) {
 564                         procmime_scan_subject
 565                                 (mimeinfo, buf + strlen(hp->name));
 566                 }
 567         }
 568
 569         if (mimeinfo->mime_type == MIME_APPLICATION_OCTET_STREAM &&
 570             mimeinfo->name) {
 571                 const gchar *type;
 572                 type = procmime_get_mime_type(mimeinfo->name);
 573                 if (type)
 574                         mimeinfo->mime_type = procmime_scan_mime_type(type);
 575         }
 576
 577         if (!mimeinfo->content_type) {
 578                 if (mimeinfo->mime_type == MIME_MESSAGE_RFC822) {
 579                         mimeinfo->content_type = g_strdup("message/rfc822");
 580                 } else {
 581                         mimeinfo->content_type = g_strdup("text/plain");
 582                 }
 583         }
 584
 585         return mimeinfo;
 586 }
 587
 588 FILE *procmime_decode_content(FILE *outfp, FILE *infp, MimeInfo *mimeinfo)
 589 {
 590         gchar buf[BUFFSIZE];
 591         gchar *boundary = NULL;
 592         gint boundary_len = 0;
 593         gboolean tmp_file = FALSE;
 594
 595         g_return_val_if_fail(infp != NULL, NULL);
 596         g_return_val_if_fail(mimeinfo != NULL, NULL);
 597
 598         if (!outfp) {
 599                 outfp = my_tmpfile();
 600                 if (!outfp) {
 601                         perror("tmpfile");
 602                         return NULL;
 603                 }
 604                 tmp_file = TRUE;
 605         }
 606
 607         if (mimeinfo->parent && mimeinfo->parent->boundary) {
 608                 boundary = mimeinfo->parent->boundary;
 609                 boundary_len = strlen(boundary);
 610         }
 611
 612         if (mimeinfo->encoding_type == ENC_QUOTED_PRINTABLE) {
 613                 gboolean softline = FALSE;
 614
 615                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 616                        (!boundary ||
 617                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 618                         guchar *p = buf;
 619
 620                         softline = DoOneQPLine(&p, FALSE, softline);
 621                         fwrite(buf, p - (guchar *)buf, 1, outfp);
 622                 }
 623         } else if (mimeinfo->encoding_type == ENC_BASE64) {
 624                 gchar outbuf[BUFFSIZE];
 625                 gint len;
 626                 Base64Decoder *decoder;
 627
 628                 decoder = base64_decoder_new();
 629                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 630                        (!boundary ||
 631                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 632                         len = base64_decoder_decode(decoder, buf, outbuf);
 633                         if (len < 0) {
 634                                 g_warning("Bad BASE64 content\n");
 635                                 break;
 636                         }
 637                         fwrite(outbuf, sizeof(gchar), len, outfp);
 638                 }
 639                 base64_decoder_free(decoder);
 640         } else if (mimeinfo->encoding_type == ENC_X_UUENCODE) {
 641                 gchar outbuf[BUFFSIZE];
 642                 gint len;
 643                 gboolean flag = FALSE;
 644
 645                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 646                        (!boundary ||
 647                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 648                         if(!flag && strncmp(buf,"begin ", 6)) continue;
 649
 650                         if (flag) {
 651                                 len = fromuutobits(outbuf, buf);
 652                                 if (len <= 0) {
 653                                         if (len < 0)
 654                                                 g_warning("Bad UUENCODE content(%d)\n", len);
 655                                         break;
 656                                 }
 657                                 fwrite(outbuf, sizeof(gchar), len, outfp);
 658                         } else
 659                                 flag = TRUE;
 660                 }
 661         } else {
 662                 while (fgets(buf, sizeof(buf), infp) != NULL &&
 663                        (!boundary ||
 664                         !IS_BOUNDARY(buf, boundary, boundary_len))) {
 665                         fputs(buf, outfp);
 666                 }
 667         }
 668
 669         if (tmp_file) rewind(outfp);
 670         return outfp;
 671 }
 672
 673 gint procmime_get_part(const gchar *outfile, const gchar *infile,
 674                        MimeInfo *mimeinfo)
 675 {
 676         FILE *infp, *outfp;
 677         gchar buf[BUFFSIZE];
 678
 679         g_return_val_if_fail(outfile != NULL, -1);
 680         g_return_val_if_fail(infile != NULL, -1);
 681         g_return_val_if_fail(mimeinfo != NULL, -1);
 682
 683         if ((infp = fopen(infile, "r")) == NULL) {
 684                 FILE_OP_ERROR(infile, "fopen");
 685                 return -1;
 686         }
 687         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 688                 FILE_OP_ERROR(infile, "fseek");
 689                 fclose(infp);
 690                 return -1;
 691         }
 692         if ((outfp = fopen(outfile, "w")) == NULL) {
 693                 FILE_OP_ERROR(outfile, "fopen");
 694                 fclose(infp);
 695                 return -1;
 696         }
 697
 698         while (fgets(buf, sizeof(buf), infp) != NULL)
 699                 if (buf[0] == '\r' || buf[0] == '\n') break;
 700
 701         procmime_decode_content(outfp, infp, mimeinfo);
 702
 703         fclose(infp);
 704         if (fclose(outfp) == EOF) {
 705                 FILE_OP_ERROR(outfile, "fclose");
 706                 unlink(outfile);
 707                 return -1;
 708         }
 709
 710         return 0;
 711 }
 712
 713 struct ContentRenderer {
 714         char * content_type;
 715         char * renderer;
 716 };
 717
 718 static GList * renderer_list = NULL;
 719
 720 static struct ContentRenderer *
 721 content_renderer_new(char * content_type, char * renderer)
 722 {
 723         struct ContentRenderer * cr;
 724
 725         cr = g_new(struct ContentRenderer, 1);
 726         if (cr == NULL)
 727                 return NULL;
 728
 729         cr->content_type = g_strdup(content_type);
 730         cr->renderer = g_strdup(renderer);
 731
 732         return cr;
 733 }
 734
 735 static void content_renderer_free(struct ContentRenderer * cr)
 736 {
 737         g_free(cr->content_type);
 738         g_free(cr->renderer);
 739         g_free(cr);
 740 }
 741
 742 void renderer_read_config(void)
 743 {
 744         gchar buf[BUFFSIZE];
 745         FILE * f;
 746         gchar * rcpath;
 747
 748         g_list_foreach(renderer_list, (GFunc) content_renderer_free, NULL);
 749         renderer_list = NULL;
 750
 751         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 752         f = fopen(rcpath, "r");
 753         g_free(rcpath);
 754
 755         if (f == NULL)
 756                 return;
 757
 758         while (fgets(buf, BUFFSIZE, f)) {
 759                 char * p;
 760                 struct ContentRenderer * cr;
 761
 762                 strretchomp(buf);
 763                 p = strchr(buf, ' ');
 764                 if (p == NULL)
 765                         continue;
 766                 * p = 0;
 767
 768                 cr = content_renderer_new(buf, p + 1);
 769                 if (cr == NULL)
 770                         continue;
 771
 772                 printf("%s %s\n", cr->content_type, cr->renderer);
 773
 774                 renderer_list = g_list_append(renderer_list, cr);
 775         }
 776
 777         fclose(f);
 778 }
 779
 780 void renderer_write_config(void)
 781 {
 782         int i;
 783         gchar * rcpath;
 784         PrefFile *pfile;
 785         GList * cur;
 786
 787         rcpath = g_strconcat(get_rc_dir(), G_DIR_SEPARATOR_S, RENDERER_RC, NULL);
 788
 789         if ((pfile = prefs_write_open(rcpath)) == NULL) {
 790                 g_warning(_("failed to write configuration to file\n"));
 791                 g_free(rcpath);
 792                 return;
 793         }
 794
 795         g_free(rcpath);
 796
 797         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 798                 struct ContentRenderer * renderer;
 799                 renderer = cur->data;
 800                 fprintf(pfile->fp, "%s %s\n", renderer->content_type,
 801                         renderer->renderer);
 802         }
 803
 804         if (prefs_write_close(pfile) < 0) {
 805                 g_warning(_("failed to write configuration to file\n"));
 806                 return;
 807         }
 808 }
 809
 810 FILE *procmime_get_text_content(MimeInfo *mimeinfo, FILE *infp)
 811 {
 812         FILE *tmpfp, *outfp;
 813         gchar *src_codeset;
 814         gboolean conv_fail = FALSE;
 815         gchar buf[BUFFSIZE];
 816         gchar *str;
 817         int i;
 818         struct ContentRenderer * renderer;
 819         GList * cur;
 820
 821         g_return_val_if_fail(mimeinfo != NULL, NULL);
 822         g_return_val_if_fail(infp != NULL, NULL);
 823         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 824                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 825                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, NULL);
 826
 827         if (fseek(infp, mimeinfo->fpos, SEEK_SET) < 0) {
 828                 perror("fseek");
 829                 return NULL;
 830         }
 831
 832         while (fgets(buf, sizeof(buf), infp) != NULL)
 833                 if (buf[0] == '\r' || buf[0] == '\n') break;
 834
 835         tmpfp = procmime_decode_content(NULL, infp, mimeinfo);
 836         if (!tmpfp)
 837                 return NULL;
 838
 839         if ((outfp = my_tmpfile()) == NULL) {
 840                 perror("tmpfile");
 841                 fclose(tmpfp);
 842                 return NULL;
 843         }
 844
 845         src_codeset = prefs_common.force_charset
 846                 ? prefs_common.force_charset : mimeinfo->charset;
 847
 848         renderer = NULL;
 849
 850         for(cur = renderer_list ; cur != NULL ; cur = cur->next) {
 851                 struct ContentRenderer * cr;
 852                 cr = cur->data;
 853                 if (g_strcasecmp(cr->content_type,
 854                                  mimeinfo->content_type) == 0) {
 855                         renderer = cr;
 856                         break;
 857                 }
 858         }
 859
 860         if (renderer != NULL) {
 861                 FILE * p;
 862                 int oldout;
 863
 864                 oldout = dup(1);
 865
 866                 dup2(fileno(outfp), 1);
 867
 868                 p = popen(renderer->renderer, "w");
 869                 if (p != NULL) {
 870                         size_t count;
 871
 872                         while ((count =
 873                                 fread(buf, sizeof(char), sizeof(buf),
 874                                       tmpfp)) > 0)
 875                                 fwrite(buf, sizeof(char), count, p);
 876                         pclose(p);
 877                 }
 878
 879                 dup2(oldout, 1);
 880         } else if (mimeinfo->mime_type == MIME_TEXT) {
 881                 while (fgets(buf, sizeof(buf), tmpfp) != NULL) {
 882                         str = conv_codeset_strdup(buf, src_codeset, NULL);
 883                         if (str) {
 884                                 fputs(str, outfp);
 885                                 g_free(str);
 886                         } else {
 887                                 conv_fail = TRUE;
 888                                 fputs(buf, outfp);
 889                         }
 890                 }
 891         } else if (mimeinfo->mime_type == MIME_TEXT_HTML) {
 892                 HTMLParser *parser;
 893                 CodeConverter *conv;
 894
 895                 conv = conv_code_converter_new(src_codeset);
 896                 parser = html_parser_new(tmpfp, conv);
 897                 while ((str = html_parse(parser)) != NULL) {
 898                         fputs(str, outfp);
 899                 }
 900                 html_parser_destroy(parser);
 901                 conv_code_converter_destroy(conv);
 902         } else if (mimeinfo->mime_type == MIME_TEXT_ENRICHED) {
 903                 ERTFParser *parser;
 904                 CodeConverter *conv;
 905
 906                 conv = conv_code_converter_new(src_codeset);
 907                 parser = ertf_parser_new(tmpfp, conv);
 908                 while ((str = ertf_parse(parser)) != NULL) {
 909                         fputs(str, outfp);
 910                 }
 911                 ertf_parser_destroy(parser);
 912                 conv_code_converter_destroy(conv);
 913         }
 914
 915         if (conv_fail)
 916                 g_warning(_("procmime_get_text_content(): Code conversion failed.\n"));
 917
 918         fclose(tmpfp);
 919         rewind(outfp);
 920
 921         return outfp;
 922 }
 923
 924 /* search the first text part of (multipart) MIME message,
 925    decode, convert it and output to outfp. */
 926 FILE *procmime_get_first_text_content(MsgInfo *msginfo)
 927 {
 928         FILE *infp, *outfp = NULL;
 929         MimeInfo *mimeinfo, *partinfo;
 930
 931         g_return_val_if_fail(msginfo != NULL, NULL);
 932
 933         mimeinfo = procmime_scan_message(msginfo);
 934         if (!mimeinfo) return NULL;
 935
 936         if ((infp = procmsg_open_message(msginfo)) == NULL) {
 937                 procmime_mimeinfo_free_all(mimeinfo);
 938                 return NULL;
 939         }
 940
 941         partinfo = mimeinfo;
 942         while (partinfo && partinfo->mime_type != MIME_TEXT)
 943                 partinfo = procmime_mimeinfo_next(partinfo);
 944         if (!partinfo) {
 945                 partinfo = mimeinfo;
 946                 while (partinfo && partinfo->mime_type != MIME_TEXT_HTML &&
 947                                 partinfo->mime_type != MIME_TEXT_ENRICHED)
 948                         partinfo = procmime_mimeinfo_next(partinfo);
 949         }
 950
 951
 952         if (partinfo)
 953                 outfp = procmime_get_text_content(partinfo, infp);
 954
 955         fclose(infp);
 956         procmime_mimeinfo_free_all(mimeinfo);
 957
 958         return outfp;
 959 }
 960
 961 gboolean procmime_find_string_part(MimeInfo *mimeinfo, const gchar *filename,
 962                                    const gchar *str, gboolean case_sens)
 963 {
 964
 965         FILE *infp, *outfp;
 966         gchar buf[BUFFSIZE];
 967         gchar *(* StrFindFunc) (const gchar *haystack, const gchar *needle);
 968
 969         g_return_val_if_fail(mimeinfo != NULL, FALSE);
 970         g_return_val_if_fail(mimeinfo->mime_type == MIME_TEXT ||
 971                              mimeinfo->mime_type == MIME_TEXT_HTML ||
 972                              mimeinfo->mime_type == MIME_TEXT_ENRICHED, FALSE);
 973         g_return_val_if_fail(str != NULL, FALSE);
 974
 975         if ((infp = fopen(filename, "r")) == NULL) {
 976                 FILE_OP_ERROR(filename, "fopen");
 977                 return FALSE;
 978         }
 979
 980         outfp = procmime_get_text_content(mimeinfo, infp);
 981         fclose(infp);
 982
 983         if (!outfp)
 984                 return FALSE;
 985
 986         if (case_sens)
 987                 StrFindFunc = strstr;
 988         else
 989                 StrFindFunc = strcasestr;
 990
 991         while (fgets(buf, sizeof(buf), outfp) != NULL) {
 992                 if (StrFindFunc(buf, str) != NULL) {
 993                         fclose(outfp);
 994                         return TRUE;
 995                 }
 996         }
 997
 998         fclose(outfp);
 999
1000         return FALSE;
1001 }
1002
1003 gboolean procmime_find_string(MsgInfo *msginfo, const gchar *str,
1004                               gboolean case_sens)
1005 {
1006         MimeInfo *mimeinfo;
1007         MimeInfo *partinfo;
1008         gchar *filename;
1009         gboolean found = FALSE;
1010
1011         g_return_val_if_fail(msginfo != NULL, FALSE);
1012         g_return_val_if_fail(str != NULL, FALSE);
1013
1014         filename = procmsg_get_message_file(msginfo);
1015         if (!filename) return FALSE;
1016         mimeinfo = procmime_scan_message(msginfo);
1017
1018         for (partinfo = mimeinfo; partinfo != NULL;
1019              partinfo = procmime_mimeinfo_next(partinfo)) {
1020                 if (partinfo->mime_type == MIME_TEXT ||
1021                     partinfo->mime_type == MIME_TEXT_HTML ||
1022                     partinfo->mime_type == MIME_TEXT_ENRICHED) {
1023                         if (procmime_find_string_part
1024                                 (partinfo, filename, str, case_sens) == TRUE) {
1025                                 found = TRUE;
1026                                 break;
1027                         }
1028                 }
1029         }
1030
1031         procmime_mimeinfo_free_all(mimeinfo);
1032         g_free(filename);
1033
1034         return found;
1035 }
1036
1037 gchar *procmime_get_tmp_file_name(MimeInfo *mimeinfo)
1038 {
1039         static guint32 id = 0;
1040         gchar *base;
1041         gchar *filename;
1042         gchar f_prefix[10];
1043
1044         g_return_val_if_fail(mimeinfo != NULL, NULL);
1045
1046         g_snprintf(f_prefix, sizeof(f_prefix), "%08x.", id++);
1047
1048         if (MIME_TEXT_HTML == mimeinfo->mime_type)
1049                 base = "mimetmp.html";
1050         else {
1051                 base = mimeinfo->filename ? mimeinfo->filename
1052                         : mimeinfo->name ? mimeinfo->name : "mimetmp";
1053                 base = g_basename(base);
1054                 if (*base == '\0') base = "mimetmp";
1055         }
1056
1057         filename = g_strconcat(get_mime_tmp_dir(), G_DIR_SEPARATOR_S,
1058                                f_prefix, base, NULL);
1059
1060         return filename;
1061 }
1062
1063 ContentType procmime_scan_mime_type(const gchar *mime_type)
1064 {
1065         ContentType type;
1066
1067         if (!strncasecmp(mime_type, "text/html", 9))
1068                 type = MIME_TEXT_HTML;
1069         else if (!strncasecmp(mime_type, "text/enriched", 13))
1070                 type = MIME_TEXT_ENRICHED;
1071         else if (!strncasecmp(mime_type, "text/", 5))
1072                 type = MIME_TEXT;
1073         else if (!strncasecmp(mime_type, "message/rfc822", 14))
1074                 type = MIME_MESSAGE_RFC822;
1075         else if (!strncasecmp(mime_type, "message/", 8))
1076                 type = MIME_TEXT;
1077         else if (!strncasecmp(mime_type, "application/octet-stream", 24))
1078                 type = MIME_APPLICATION_OCTET_STREAM;
1079         else if (!strncasecmp(mime_type, "application/", 12))
1080                 type = MIME_APPLICATION;
1081         else if (!strncasecmp(mime_type, "multipart/", 10))
1082                 type = MIME_MULTIPART;
1083         else if (!strncasecmp(mime_type, "image/", 6))
1084                 type = MIME_IMAGE;
1085         else if (!strncasecmp(mime_type, "audio/", 6))
1086                 type = MIME_AUDIO;
1087         else if (!strcasecmp(mime_type, "text"))
1088                 type = MIME_TEXT;
1089         else
1090                 type = MIME_UNKNOWN;
1091
1092         return type;
1093 }
1094
1095 static GList *mime_type_list = NULL;
1096
1097 gchar *procmime_get_mime_type(const gchar *filename)
1098 {
1099         static GHashTable *mime_type_table = NULL;
1100         MimeType *mime_type;
1101         const gchar *p;
1102         gchar *ext;
1103
1104         if (!mime_type_table) {
1105                 mime_type_table = procmime_get_mime_type_table();
1106                 if (!mime_type_table) return NULL;
1107         }
1108
1109         filename = g_basename(filename);
1110         p = strrchr(filename, '.');
1111         if (!p) return NULL;
1112
1113         Xstrdup_a(ext, p + 1, return NULL);
1114         g_strdown(ext);
1115         mime_type = g_hash_table_lookup(mime_type_table, ext);
1116         if (mime_type) {
1117                 gchar *str;
1118
1119                 str = g_strconcat(mime_type->type, "/", mime_type->sub_type,
1120                                   NULL);
1121                 return str;
1122         }
1123
1124         return NULL;
1125 }
1126
1127 static guint procmime_str_hash(gconstpointer gptr)
1128 {
1129         guint hash_result = 0;
1130         const char *str;
1131
1132         for (str = gptr; str && *str; str++) {
1133                 if (isupper(*str)) hash_result += (*str + ' ');
1134                 else hash_result += *str;
1135         }
1136
1137         return hash_result;
1138 }
1139
1140 static gint procmime_str_equal(gconstpointer gptr1, gconstpointer gptr2)
1141 {
1142         const char *str1 = gptr1;
1143         const char *str2 = gptr2;
1144
1145         return !strcasecmp(str1, str2);
1146 }
1147
1148 static GHashTable *procmime_get_mime_type_table(void)
1149 {
1150         GHashTable *table = NULL;
1151         GList *cur;
1152         MimeType *mime_type;
1153         gchar **exts;
1154
1155         if (!mime_type_list) {
1156                 mime_type_list = procmime_get_mime_type_list();
1157                 if (!mime_type_list) return NULL;
1158         }
1159
1160         table = g_hash_table_new(procmime_str_hash, procmime_str_equal);
1161
1162         for (cur = mime_type_list; cur != NULL; cur = cur->next) {
1163                 gint i;
1164                 gchar *key;
1165
1166                 mime_type = (MimeType *)cur->data;
1167
1168                 if (!mime_type->extension) continue;
1169
1170                 exts = g_strsplit(mime_type->extension, " ", 16);
1171                 for (i = 0; exts[i] != NULL; i++) {
1172                         /* make the key case insensitive */
1173                         g_strdown(exts[i]);
1174                         /* use previously dup'd key on overwriting */
1175                         if (g_hash_table_lookup(table, exts[i]))
1176                                 key = exts[i];
1177                         else
1178                                 key = g_strdup(exts[i]);
1179                         g_hash_table_insert(table, key, mime_type);
1180                 }
1181                 g_strfreev(exts);
1182         }
1183
1184         return table;
1185 }
1186
1187 GList *procmime_get_mime_type_list(void)
1188 {
1189         GList *list = NULL;
1190         FILE *fp;
1191         gchar buf[BUFFSIZE];
1192         gchar *p, *delim;
1193         MimeType *mime_type;
1194
1195         if (mime_type_list)
1196                 return mime_type_list;
1197
1198         if ((fp = fopen("/etc/mime.types", "r")) == NULL) {
1199                 if ((fp = fopen(SYSCONFDIR "/mime.types", "r")) == NULL) {
1200                         FILE_OP_ERROR(SYSCONFDIR "/mime.types", "fopen");
1201                         return NULL;
1202                 }
1203         }
1204
1205         while (fgets(buf, sizeof(buf), fp) != NULL) {
1206                 p = strchr(buf, '#');
1207                 if (p) *p = '\0';
1208                 g_strstrip(buf);
1209
1210                 p = buf;
1211                 while (*p && !isspace(*p)) p++;
1212                 if (*p) {
1213                         *p = '\0';
1214                         p++;
1215                 }
1216                 delim = strchr(buf, '/');
1217                 if (delim == NULL) continue;
1218                 *delim = '\0';
1219
1220                 mime_type = g_new(MimeType, 1);
1221                 mime_type->type = g_strdup(buf);
1222                 mime_type->sub_type = g_strdup(delim + 1);
1223
1224                 while (*p && isspace(*p)) p++;
1225                 if (*p)
1226                         mime_type->extension = g_strdup(p);
1227                 else
1228                         mime_type->extension = NULL;
1229
1230                 list = g_list_append(list, mime_type);
1231         }
1232
1233         fclose(fp);
1234
1235         if (!list)
1236                 g_warning("Can't read mime.types\n");
1237
1238         return list;
1239 }
1240
1241 EncodingType procmime_get_encoding_for_charset(const gchar *charset)
1242 {
1243         if (!charset)
1244                 return ENC_8BIT;
1245         else if (!strncasecmp(charset, "ISO-2022-", 9) ||
1246                  !strcasecmp(charset, "US-ASCII"))
1247                 return ENC_7BIT;
1248         else
1249                 return ENC_8BIT;
1250                 /* return ENC_BASE64; */
1251                 /* return ENC_QUOTED_PRINTABLE; */
1252 }
1253
1254 const gchar *procmime_get_encoding_str(EncodingType encoding)
1255 {
1256         static const gchar *encoding_str[] = {
1257                 "7bit", "8bit", "quoted-printable", "base64", "x-uuencode",
1258                 NULL
1259         };
1260
1261         if (encoding >= ENC_7BIT && encoding <= ENC_UNKNOWN)
1262                 return encoding_str[encoding];
1263         else
1264                 return NULL;
1265 }