src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2014 Hiroyuki Yamamoto and the Claws Mail team
   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 3 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include <glib.h>
  26 #include <glib/gi18n.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <time.h>
  31 #include <sys/stat.h>
  32
  33 #ifdef G_OS_WIN32
  34 #  include <w32lib.h>
  35 #endif
  36
  37 #include "procheader.h"
  38 #include "procmsg.h"
  39 #include "codeconv.h"
  40 #include "prefs_common.h"
  41 #include "hooks.h"
  42 #include "utils.h"
  43 #include "defs.h"
  44
  45 #define BUFFSIZE        8192
  46
  47 static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
  48
  49 typedef char *(*getlinefunc) (char *, size_t, void *);
  50 typedef int (*peekcharfunc) (void *);
  51 typedef int (*getcharfunc) (void *);
  52 typedef gint (*get_one_field_func) (gchar *, size_t, void *, HeaderEntry[]);
  53
  54 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  55                                  HeaderEntry hentry[]);
  56
  57 static char *string_getline(char *buf, size_t len, char **str);
  58 static int string_peekchar(char **str);
  59 static int file_peekchar(FILE *fp);
  60 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
  61                                   HeaderEntry hentry[],
  62                                   getlinefunc getline,
  63                                   peekcharfunc peekchar,
  64                                   gboolean unfold);
  65 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
  66                              gboolean full, gboolean decrypted);
  67
  68
  69 gint procheader_get_one_field(gchar *buf, size_t len, FILE *fp,
  70                               HeaderEntry hentry[])
  71 {
  72         return generic_get_one_field(buf, len, fp, hentry,
  73                                      (getlinefunc)fgets_crlf, (peekcharfunc)file_peekchar,
  74                                      TRUE);
  75 }
  76
  77 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  78                                  HeaderEntry hentry[])
  79 {
  80         return generic_get_one_field(buf, len, str, hentry,
  81                                      (getlinefunc)string_getline,
  82                                      (peekcharfunc)string_peekchar,
  83                                      TRUE);
  84 }
  85
  86 static char *string_getline(char *buf, size_t len, char **str)
  87 {
  88         gboolean is_cr = FALSE;
  89         gboolean last_was_cr = FALSE;
  90
  91         if (!*str || !**str)
  92                 return NULL;
  93
  94         for (; **str && len > 1; --len) {
  95                 is_cr = (**str == '\r');
  96                 if ((*buf++ = *(*str)++) == '\n') {
  97                     break;
  98                 }
  99                 if (last_was_cr) {
 100                         *(--buf) = '\n';
 101                         buf++;
 102                     break;
 103                 }
 104                 last_was_cr = is_cr;
 105         }
 106
 107         *buf = '\0';
 108
 109         return buf;
 110 }
 111
 112 static int string_peekchar(char **str)
 113 {
 114         return **str;
 115 }
 116
 117 static int file_peekchar(FILE *fp)
 118 {
 119         return ungetc(getc(fp), fp);
 120 }
 121
 122 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
 123                           HeaderEntry *hentry,
 124                           getlinefunc getline, peekcharfunc peekchar,
 125                           gboolean unfold)
 126 {
 127         gint nexthead;
 128         gint hnum = 0;
 129         HeaderEntry *hp = NULL;
 130
 131         if (hentry != NULL) {
 132                 /* skip non-required headers */
 133                 do {
 134                         do {
 135                                 if (getline(buf, len, data) == NULL)
 136                                         return -1;
 137                                 if (buf[0] == '\r' || buf[0] == '\n')
 138                                         return -1;
 139                         } while (buf[0] == ' ' || buf[0] == '\t');
 140
 141                         for (hp = hentry, hnum = 0; hp->name != NULL;
 142                              hp++, hnum++) {
 143                                 if (!g_ascii_strncasecmp(hp->name, buf,
 144                                                  strlen(hp->name)))
 145                                         break;
 146                         }
 147                 } while (hp->name == NULL);
 148         } else {
 149                 if (getline(buf, len, data) == NULL) return -1;
 150                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
 151         }
 152
 153         /* unfold line */
 154         while (1) {
 155                 nexthead = peekchar(data);
 156                 /* ([*WSP CRLF] 1*WSP) */
 157                 if (nexthead == ' ' || nexthead == '\t') {
 158                         size_t buflen;
 159                         gboolean skiptab = (nexthead == '\t');
 160                         /* trim previous trailing \n if requesting one header or
 161                          * unfolding was requested */
 162                         if ((!hentry && unfold) || (hp && hp->unfold))
 163                                 strretchomp(buf);
 164
 165                         buflen = strlen(buf);
 166
 167                         /* concatenate next line */
 168                         if ((len - buflen) > 2) {
 169                                 if (getline(buf + buflen, len - buflen, data) == NULL)
 170                                         break;
 171                                 if (skiptab) { /* replace tab with space */
 172                                         *(buf + buflen) = ' ';
 173                                 }
 174                         } else
 175                                 break;
 176                 } else {
 177                         /* remove trailing new line */
 178                         strretchomp(buf);
 179                         break;
 180                 }
 181         }
 182
 183         return hnum;
 184 }
 185
 186 gint procheader_get_one_field_asis(gchar *buf, size_t len, FILE *fp)
 187 {
 188         return generic_get_one_field(buf, len, fp, NULL,
 189                                      (getlinefunc)fgets_crlf,
 190                                      (peekcharfunc)file_peekchar,
 191                                      FALSE);
 192 }
 193
 194 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 195 {
 196         gchar buf[BUFFSIZE];
 197         GPtrArray *headers;
 198         Header *header;
 199
 200         cm_return_val_if_fail(fp != NULL, NULL);
 201
 202         headers = g_ptr_array_new();
 203
 204         while (procheader_get_one_field_asis(buf, sizeof(buf), fp) != -1) {
 205                 if ((header = procheader_parse_header(buf)) != NULL)
 206                         g_ptr_array_add(headers, header);
 207         }
 208
 209         return headers;
 210 }
 211
 212 void procheader_header_array_destroy(GPtrArray *harray)
 213 {
 214         gint i;
 215         Header *header;
 216
 217         for (i = 0; i < harray->len; i++) {
 218                 header = g_ptr_array_index(harray, i);
 219                 procheader_header_free(header);
 220         }
 221
 222         g_ptr_array_free(harray, TRUE);
 223 }
 224
 225 void procheader_header_free(Header *header)
 226 {
 227         if (!header) return;
 228
 229         g_free(header->name);
 230         g_free(header->body);
 231         g_free(header);
 232 }
 233
 234 /*
 235   tests whether two headers' names are equal
 236   remove the trailing ':' or ' ' before comparing
 237 */
 238
 239 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 240 {
 241         int len1;
 242         int len2;
 243
 244         len1 = strlen(hdr1);
 245         len2 = strlen(hdr2);
 246         if (hdr1[len1 - 1] == ':')
 247                 len1--;
 248         if (hdr2[len2 - 1] == ':')
 249                 len2--;
 250         if (len1 != len2)
 251                 return 0;
 252
 253         return (g_ascii_strncasecmp(hdr1, hdr2, len1) == 0);
 254 }
 255
 256 /*
 257   parse headers, for example :
 258   From: dinh@enseirb.fr becomes :
 259   header->name = "From:"
 260   header->body = "dinh@enseirb.fr"
 261  */
 262 static gboolean header_is_addr_field(const gchar *hdr)
 263 {
 264         static char *addr_headers[] = {
 265                                 "To:",
 266                                 "Cc:",
 267                                 "Bcc:",
 268                                 "From:",
 269                                 "Reply-To:",
 270                                 "Followup-To:",
 271                                 "Followup-and-Reply-To:",
 272                                 "Disposition-Notification-To:",
 273                                 "Return-Receipt-To:",
 274                                 NULL};
 275         int i;
 276
 277         if (!hdr)
 278                 return FALSE;
 279
 280         for (i = 0; addr_headers[i] != NULL; i++)
 281                 if (!strcasecmp(hdr, addr_headers[i]))
 282                         return FALSE;
 283
 284         return FALSE;
 285 }
 286
 287 Header * procheader_parse_header(gchar * buf)
 288 {
 289         gchar *p;
 290         Header * header;
 291         gboolean addr_field = FALSE;
 292
 293         if ((*buf == ':') || (*buf == ' '))
 294                 return NULL;
 295
 296         for (p = buf; *p ; p++) {
 297                 if ((*p == ':') || (*p == ' ')) {
 298                         header = g_new(Header, 1);
 299                         header->name = g_strndup(buf, p - buf + 1);
 300                         addr_field = header_is_addr_field(header->name);
 301                         p++;
 302                         while (*p == ' ' || *p == '\t') p++;
 303                         header->body = conv_unmime_header(p, NULL, addr_field);
 304                         return header;
 305                 }
 306         }
 307         return NULL;
 308 }
 309
 310 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 311 {
 312         gchar buf[BUFFSIZE];
 313         HeaderEntry *hp;
 314         gint hnum;
 315         gchar *p;
 316
 317         if (hentry == NULL) return;
 318
 319         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 320                != -1) {
 321                 hp = hentry + hnum;
 322
 323                 p = buf + strlen(hp->name);
 324                 while (*p == ' ' || *p == '\t') p++;
 325
 326                 if (hp->body == NULL)
 327                         hp->body = g_strdup(p);
 328                 else if (procheader_headername_equal(hp->name, "To") ||
 329                          procheader_headername_equal(hp->name, "Cc")) {
 330                         gchar *tp = hp->body;
 331                         hp->body = g_strconcat(tp, ", ", p, NULL);
 332                         g_free(tp);
 333                 }
 334         }
 335 }
 336
 337 MsgInfo *procheader_parse_file(const gchar *file, MsgFlags flags,
 338                                gboolean full, gboolean decrypted)
 339 {
 340         GStatBuf s;
 341         FILE *fp;
 342         MsgInfo *msginfo;
 343
 344         if (g_stat(file, &s) < 0) {
 345                 FILE_OP_ERROR(file, "stat");
 346                 return NULL;
 347         }
 348         if (!S_ISREG(s.st_mode))
 349                 return NULL;
 350
 351         if ((fp = g_fopen(file, "rb")) == NULL) {
 352                 FILE_OP_ERROR(file, "fopen");
 353                 return NULL;
 354         }
 355
 356         msginfo = procheader_parse_stream(fp, flags, full, decrypted);
 357         fclose(fp);
 358
 359         if (msginfo) {
 360                 msginfo->size = s.st_size;
 361                 msginfo->mtime = s.st_mtime;
 362         }
 363
 364         return msginfo;
 365 }
 366
 367 MsgInfo *procheader_parse_str(const gchar *str, MsgFlags flags, gboolean full,
 368                               gboolean decrypted)
 369 {
 370         return parse_stream(&str, TRUE, flags, full, decrypted);
 371 }
 372
 373 enum
 374 {
 375         H_DATE = 0,
 376         H_FROM,
 377         H_TO,
 378         H_CC,
 379         H_NEWSGROUPS,
 380         H_SUBJECT,
 381         H_MSG_ID,
 382         H_REFERENCES,
 383         H_IN_REPLY_TO,
 384         H_CONTENT_TYPE,
 385         H_SEEN,
 386         H_STATUS,
 387         H_FROM_SPACE,
 388         H_SC_PLANNED_DOWNLOAD,
 389         H_SC_MESSAGE_SIZE,
 390         H_FACE,
 391         H_X_FACE,
 392         H_DISPOSITION_NOTIFICATION_TO,
 393         H_RETURN_RECEIPT_TO,
 394         H_SC_PARTIALLY_RETRIEVED,
 395         H_SC_ACCOUNT_SERVER,
 396         H_SC_ACCOUNT_LOGIN,
 397         H_LIST_POST,
 398         H_LIST_SUBSCRIBE,
 399         H_LIST_UNSUBSCRIBE,
 400         H_LIST_HELP,
 401         H_LIST_ARCHIVE,
 402         H_LIST_OWNER,
 403         H_RESENT_FROM,
 404 };
 405
 406 static HeaderEntry hentry_full[] = {
 407                                    {"Date:",            NULL, FALSE},
 408                                    {"From:",            NULL, TRUE},
 409                                    {"To:",              NULL, TRUE},
 410                                    {"Cc:",              NULL, TRUE},
 411                                    {"Newsgroups:",      NULL, TRUE},
 412                                    {"Subject:",         NULL, TRUE},
 413                                    {"Message-ID:",      NULL, FALSE},
 414                                    {"References:",      NULL, FALSE},
 415                                    {"In-Reply-To:",     NULL, FALSE},
 416                                    {"Content-Type:",    NULL, FALSE},
 417                                    {"Seen:",            NULL, FALSE},
 418                                    {"Status:",          NULL, FALSE},
 419                                    {"From ",            NULL, FALSE},
 420                                    {"SC-Marked-For-Download:", NULL, FALSE},
 421                                    {"SC-Message-Size:", NULL, FALSE},
 422                                    {"Face:",            NULL, FALSE},
 423                                    {"X-Face:",          NULL, FALSE},
 424                                    {"Disposition-Notification-To:", NULL, FALSE},
 425                                    {"Return-Receipt-To:", NULL, FALSE},
 426                                    {"SC-Partially-Retrieved:", NULL, FALSE},
 427                                    {"SC-Account-Server:", NULL, FALSE},
 428                                    {"SC-Account-Login:",NULL, FALSE},
 429                                    {"List-Post:",       NULL, TRUE},
 430                                    {"List-Subscribe:",  NULL, TRUE},
 431                                    {"List-Unsubscribe:",NULL, TRUE},
 432                                    {"List-Help:",       NULL, TRUE},
 433                                    {"List-Archive:",    NULL, TRUE},
 434                                    {"List-Owner:",      NULL, TRUE},
 435                                    {"Resent-From:",     NULL, TRUE},
 436                                    {NULL,               NULL, FALSE}};
 437
 438 static HeaderEntry hentry_short[] = {
 439                                     {"Date:",           NULL, FALSE},
 440                                     {"From:",           NULL, TRUE},
 441                                     {"To:",             NULL, TRUE},
 442                                     {"Cc:",             NULL, TRUE},
 443                                     {"Newsgroups:",     NULL, TRUE},
 444                                     {"Subject:",        NULL, TRUE},
 445                                     {"Message-ID:",     NULL, FALSE},
 446                                     {"References:",     NULL, FALSE},
 447                                     {"In-Reply-To:",    NULL, FALSE},
 448                                     {"Content-Type:",   NULL, FALSE},
 449                                     {"Seen:",           NULL, FALSE},
 450                                     {"Status:",         NULL, FALSE},
 451                                     {"From ",           NULL, FALSE},
 452                                     {"SC-Marked-For-Download:", NULL, FALSE},
 453                                     {"SC-Message-Size:",NULL, FALSE},
 454                                     {NULL,              NULL, FALSE}};
 455
 456 static HeaderEntry* procheader_get_headernames(gboolean full)
 457 {
 458         return full ? hentry_full : hentry_short;
 459 }
 460
 461 MsgInfo *procheader_parse_stream(FILE *fp, MsgFlags flags, gboolean full,
 462                                  gboolean decrypted)
 463 {
 464         return parse_stream(fp, FALSE, flags, full, decrypted);
 465 }
 466
 467 static gboolean avatar_from_some_face(gpointer source, gpointer userdata)
 468 {
 469         AvatarCaptureData *acd = (AvatarCaptureData *)source;
 470
 471         if (*(acd->content) == '\0') /* won't be null, but may be empty */
 472                 return FALSE;
 473
 474         if (!strcmp(acd->header, hentry_full[H_FACE].name)) {
 475                 debug_print("avatar_from_some_face: found 'Face' header\n");
 476                 procmsg_msginfo_add_avatar(acd->msginfo, AVATAR_FACE, acd->content);
 477         }
 478 #if HAVE_LIBCOMPFACE
 479         else if (!strcmp(acd->header, hentry_full[H_X_FACE].name)) {
 480                 debug_print("avatar_from_some_face: found 'X-Face' header\n");
 481                 procmsg_msginfo_add_avatar(acd->msginfo, AVATAR_XFACE, acd->content);
 482         }
 483 #endif
 484         return FALSE;
 485 }
 486
 487 static guint avatar_hook_id = 0;
 488
 489 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
 490                              gboolean full, gboolean decrypted)
 491 {
 492         MsgInfo *msginfo;
 493         gchar buf[BUFFSIZE];
 494         gchar *p, *tmp;
 495         gchar *hp;
 496         HeaderEntry *hentry;
 497         gint hnum;
 498         void *orig_data = data;
 499
 500         get_one_field_func get_one_field =
 501                 isstring ? (get_one_field_func)string_get_one_field
 502                          : (get_one_field_func)procheader_get_one_field;
 503
 504         hentry = procheader_get_headernames(full);
 505
 506         if (MSG_IS_QUEUED(flags) || MSG_IS_DRAFT(flags)) {
 507                 while (get_one_field(buf, sizeof(buf), data, NULL) != -1) {
 508                         if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
 509                                 strlen("X-Claws-End-Special-Headers:"))) ||
 510                             (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
 511                                 strlen("X-Sylpheed-End-Special-Headers:"))))
 512                                 break;
 513                         /* from other mailers */
 514                         if (!strncmp(buf, "Date: ", 6)
 515                         ||  !strncmp(buf, "To: ", 4)
 516                         ||  !strncmp(buf, "From: ", 6)
 517                         ||  !strncmp(buf, "Subject: ", 9)) {
 518                                 if (isstring)
 519                                         data = orig_data;
 520                                 else
 521                                         rewind((FILE *)data);
 522                                 break;
 523                         }
 524                 }
 525         }
 526
 527         msginfo = procmsg_msginfo_new();
 528
 529         if (flags.tmp_flags || flags.perm_flags)
 530                 msginfo->flags = flags;
 531         else
 532                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_NEW | MSG_UNREAD);
 533
 534         msginfo->inreplyto = NULL;
 535
 536         if (avatar_hook_id == 0 && (prefs_common.enable_avatars & AVATARS_ENABLE_CAPTURE)) {
 537                 avatar_hook_id = hooks_register_hook(AVATAR_HEADER_UPDATE_HOOKLIST, avatar_from_some_face, NULL);
 538         } else if (avatar_hook_id != 0 && !(prefs_common.enable_avatars & AVATARS_ENABLE_CAPTURE)) {
 539                 hooks_unregister_hook(AVATAR_HEADER_UPDATE_HOOKLIST, avatar_hook_id);
 540                 avatar_hook_id = 0;
 541         }
 542
 543         while ((hnum = get_one_field(buf, sizeof(buf), data, hentry))
 544                != -1) {
 545                 hp = buf + strlen(hentry[hnum].name);
 546                 while (*hp == ' ' || *hp == '\t') hp++;
 547
 548                 switch (hnum) {
 549                 case H_DATE:
 550                         if (msginfo->date) break;
 551                         msginfo->date_t =
 552                                 procheader_date_parse(NULL, hp, 0);
 553                         if (g_utf8_validate(hp, -1, NULL)) {
 554                                 msginfo->date = g_strdup(hp);
 555                         } else {
 556                                 gchar *utf = conv_codeset_strdup(
 557                                         hp,
 558                                         conv_get_locale_charset_str_no_utf8(),
 559                                         CS_INTERNAL);
 560                                 if (utf == NULL ||
 561                                     !g_utf8_validate(utf, -1, NULL)) {
 562                                         g_free(utf);
 563                                         utf = g_malloc(strlen(buf)*2+1);
 564                                         conv_localetodisp(utf,
 565                                                 strlen(hp)*2+1, hp);
 566                                 }
 567                                 msginfo->date = utf;
 568                         }
 569                         break;
 570                 case H_FROM:
 571                         if (msginfo->from) break;
 572                         msginfo->from = conv_unmime_header(hp, NULL, TRUE);
 573                         msginfo->fromname = procheader_get_fromname(msginfo->from);
 574                         remove_return(msginfo->from);
 575                         remove_return(msginfo->fromname);
 576                         break;
 577                 case H_TO:
 578                         tmp = conv_unmime_header(hp, NULL, TRUE);
 579                         remove_return(tmp);
 580                         if (msginfo->to) {
 581                                 p = msginfo->to;
 582                                 msginfo->to =
 583                                         g_strconcat(p, ", ", tmp, NULL);
 584                                 g_free(p);
 585                         } else
 586                                 msginfo->to = g_strdup(tmp);
 587                         g_free(tmp);
 588                         break;
 589                 case H_CC:
 590                         tmp = conv_unmime_header(hp, NULL, TRUE);
 591                         remove_return(tmp);
 592                         if (msginfo->cc) {
 593                                 p = msginfo->cc;
 594                                 msginfo->cc =
 595                                         g_strconcat(p, ", ", tmp, NULL);
 596                                 g_free(p);
 597                         } else
 598                                 msginfo->cc = g_strdup(tmp);
 599                         g_free(tmp);
 600                         break;
 601                 case H_NEWSGROUPS:
 602                         if (msginfo->newsgroups) {
 603                                 p = msginfo->newsgroups;
 604                                 msginfo->newsgroups =
 605                                         g_strconcat(p, ",", hp, NULL);
 606                                 g_free(p);
 607                         } else
 608                                 msginfo->newsgroups = g_strdup(hp);
 609                         break;
 610                 case H_SUBJECT:
 611                         if (msginfo->subject) break;
 612                         msginfo->subject = conv_unmime_header(hp, NULL, FALSE);
 613                         unfold_line(msginfo->subject);
 614                        break;
 615                 case H_MSG_ID:
 616                         if (msginfo->msgid) break;
 617
 618                         extract_parenthesis(hp, '<', '>');
 619                         remove_space(hp);
 620                         msginfo->msgid = g_strdup(hp);
 621                         break;
 622                 case H_REFERENCES:
 623                         msginfo->references =
 624                                 references_list_prepend(msginfo->references,
 625                                                         hp);
 626                         break;
 627                 case H_IN_REPLY_TO:
 628                         if (msginfo->inreplyto) break;
 629
 630                         eliminate_parenthesis(hp, '(', ')');
 631                         if ((p = strrchr(hp, '<')) != NULL &&
 632                             strchr(p + 1, '>') != NULL) {
 633                                 extract_parenthesis(p, '<', '>');
 634                                 remove_space(p);
 635                                 if (*p != '\0')
 636                                         msginfo->inreplyto = g_strdup(p);
 637                         }
 638                         break;
 639                 case H_CONTENT_TYPE:
 640                         if (!g_ascii_strncasecmp(hp, "multipart/", 10))
 641                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_MULTIPART);
 642                         break;
 643                 case H_DISPOSITION_NOTIFICATION_TO:
 644                         if (!msginfo->extradata)
 645                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 646                         if (msginfo->extradata->dispositionnotificationto) break;
 647                         msginfo->extradata->dispositionnotificationto = g_strdup(hp);
 648                         break;
 649                 case H_RETURN_RECEIPT_TO:
 650                         if (!msginfo->extradata)
 651                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 652                         if (msginfo->extradata->returnreceiptto) break;
 653                         msginfo->extradata->returnreceiptto = g_strdup(hp);
 654                         break;
 655 /* partial download infos */
 656                 case H_SC_PARTIALLY_RETRIEVED:
 657                         if (!msginfo->extradata)
 658                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 659                         if (msginfo->extradata->partial_recv) break;
 660                         msginfo->extradata->partial_recv = g_strdup(hp);
 661                         break;
 662                 case H_SC_ACCOUNT_SERVER:
 663                         if (!msginfo->extradata)
 664                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 665                         if (msginfo->extradata->account_server) break;
 666                         msginfo->extradata->account_server = g_strdup(hp);
 667                         break;
 668                 case H_SC_ACCOUNT_LOGIN:
 669                         if (!msginfo->extradata)
 670                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 671                         if (msginfo->extradata->account_login) break;
 672                         msginfo->extradata->account_login = g_strdup(hp);
 673                         break;
 674                 case H_SC_MESSAGE_SIZE:
 675                         if (msginfo->total_size) break;
 676                         msginfo->total_size = atoi(hp);
 677                         break;
 678                 case H_SC_PLANNED_DOWNLOAD:
 679                         msginfo->planned_download = atoi(hp);
 680                         break;
 681 /* end partial download infos */
 682                 case H_FROM_SPACE:
 683                         if (msginfo->fromspace) break;
 684                         msginfo->fromspace = g_strdup(hp);
 685                         remove_return(msginfo->fromspace);
 686                         break;
 687 /* list infos */
 688                 case H_LIST_POST:
 689                         if (!msginfo->extradata)
 690                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 691                         if (msginfo->extradata->list_post) break;
 692                         msginfo->extradata->list_post = g_strdup(hp);
 693                         break;
 694                 case H_LIST_SUBSCRIBE:
 695                         if (!msginfo->extradata)
 696                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 697                         if (msginfo->extradata->list_subscribe) break;
 698                         msginfo->extradata->list_subscribe = g_strdup(hp);
 699                         break;
 700                 case H_LIST_UNSUBSCRIBE:
 701                         if (!msginfo->extradata)
 702                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 703                         if (msginfo->extradata->list_unsubscribe) break;
 704                         msginfo->extradata->list_unsubscribe = g_strdup(hp);
 705                         break;
 706                 case H_LIST_HELP:
 707                         if (!msginfo->extradata)
 708                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 709                         if (msginfo->extradata->list_help) break;
 710                         msginfo->extradata->list_help = g_strdup(hp);
 711                         break;
 712                 case H_LIST_ARCHIVE:
 713                         if (!msginfo->extradata)
 714                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 715                         if (msginfo->extradata->list_archive) break;
 716                         msginfo->extradata->list_archive = g_strdup(hp);
 717                         break;
 718                 case H_LIST_OWNER:
 719                         if (!msginfo->extradata)
 720                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 721                         if (msginfo->extradata->list_owner) break;
 722                         msginfo->extradata->list_owner = g_strdup(hp);
 723                         break;
 724                 case H_RESENT_FROM:
 725                         if (!msginfo->extradata)
 726                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 727                         if (msginfo->extradata->resent_from) break;
 728                         msginfo->extradata->resent_from = g_strdup(hp);
 729                         break;
 730 /* end list infos */
 731                 default:
 732                         break;
 733                 }
 734                 /* to avoid performance penalty hooklist is invoked only for
 735                    headers known to be able to generate avatars */
 736                 if (hnum == H_FROM || hnum == H_X_FACE || hnum == H_FACE) {
 737                         AvatarCaptureData *acd = g_new0(AvatarCaptureData, 1);
 738                         /* no extra memory is wasted, hooks are expected to
 739                            take care of copying members when needed */
 740                         acd->msginfo = msginfo;
 741                         acd->header  = hentry_full[hnum].name;
 742                         acd->content = hp;
 743                         hooks_invoke(AVATAR_HEADER_UPDATE_HOOKLIST, (gpointer)acd);
 744                         g_free(acd);
 745                 }
 746         }
 747
 748         if (!msginfo->inreplyto && msginfo->references)
 749                 msginfo->inreplyto =
 750                         g_strdup((gchar *)msginfo->references->data);
 751
 752         return msginfo;
 753 }
 754
 755 gchar *procheader_get_fromname(const gchar *str)
 756 {
 757         gchar *tmp, *name;
 758
 759         Xstrdup_a(tmp, str, return NULL);
 760
 761         if (*tmp == '\"') {
 762                 extract_quote(tmp, '\"');
 763                 g_strstrip(tmp);
 764         } else if (strchr(tmp, '<')) {
 765                 eliminate_parenthesis(tmp, '<', '>');
 766                 g_strstrip(tmp);
 767                 if (*tmp == '\0') {
 768                         strcpy(tmp, str);
 769                         extract_parenthesis(tmp, '<', '>');
 770                         g_strstrip(tmp);
 771                 }
 772         } else if (strchr(tmp, '(')) {
 773                 extract_parenthesis(tmp, '(', ')');
 774                 g_strstrip(tmp);
 775         }
 776
 777         if (*tmp == '\0')
 778                 name = g_strdup(str);
 779         else
 780                 name = g_strdup(tmp);
 781
 782         return name;
 783 }
 784
 785 static gint procheader_scan_date_string(const gchar *str,
 786                                         gchar *weekday, gint *day,
 787                                         gchar *month, gint *year,
 788                                         gint *hh, gint *mm, gint *ss,
 789                                         gchar *zone)
 790 {
 791         gint result;
 792         gint month_n;
 793         gint secfract;
 794         gint zone1 = 0, zone2 = 0;
 795         gchar offset_sign, zonestr[7];
 796         gchar sep1;
 797
 798         if (str == NULL)
 799                 return -1;
 800
 801         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d %6s",
 802                         weekday, day, month, year, hh, mm, ss, zone);
 803         if (result == 8) return 0;
 804
 805         /* RFC2822 */
 806         result = sscanf(str, "%3s,%d %9s %d %2d:%2d:%2d %6s",
 807                         weekday, day, month, year, hh, mm, ss, zone);
 808         if (result == 8) return 0;
 809
 810         result = sscanf(str, "%d %9s %d %2d:%2d:%2d %6s",
 811                         day, month, year, hh, mm, ss, zone);
 812         if (result == 7) return 0;
 813
 814         *zone = '\0';
 815         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d",
 816                         weekday, day, month, year, hh, mm, ss);
 817         if (result == 7) return 0;
 818
 819         result = sscanf(str, "%d %9s %d %2d:%2d:%2d",
 820                         day, month, year, hh, mm, ss);
 821         if (result == 6) return 0;
 822
 823         *ss = 0;
 824         result = sscanf(str, "%10s %d %9s %d %2d:%2d %6s",
 825                         weekday, day, month, year, hh, mm, zone);
 826         if (result == 7) return 0;
 827
 828         result = sscanf(str, "%d %9s %d %2d:%2d %5s",
 829                         day, month, year, hh, mm, zone);
 830         if (result == 6) return 0;
 831
 832         *zone = '\0';
 833         result = sscanf(str, "%10s %d %9s %d %2d:%2d",
 834                         weekday, day, month, year, hh, mm);
 835         if (result == 6) return 0;
 836
 837         result = sscanf(str, "%d %9s %d %2d:%2d",
 838                         day, month, year, hh, mm);
 839         if (result == 5) return 0;
 840
 841         *weekday = '\0';
 842
 843         /* RFC3339 subset, with fraction of second */
 844         result = sscanf(str, "%4d-%2d-%2d%c%2d:%2d:%2d.%d%6s",
 845                         year, &month_n, day, &sep1, hh, mm, ss, &secfract, zonestr);
 846         if (result == 9
 847                         && (sep1 == 'T' || sep1 == 't' || sep1 == ' ')) {
 848                 if (month_n >= 1 && month_n <= 12) {
 849                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 850                         if (zonestr[0] == 'z' || zonestr[0] == 'Z') {
 851                                 strcat(zone, "+00:00");
 852                         } else if (sscanf(zonestr, "%c%2d:%2d",
 853                                                 &offset_sign, &zone1, &zone2) == 3) {
 854                                 strcat(zone, zonestr);
 855                         }
 856                         return 0;
 857                 }
 858         }
 859
 860         /* RFC3339 subset, no fraction of second */
 861         result = sscanf(str, "%4d-%2d-%2d%c%2d:%2d:%2d%6s",
 862                         year, &month_n, day, &sep1, hh, mm, ss, zonestr);
 863         if (result == 8
 864                         && (sep1 == 'T' || sep1 == 't' || sep1 == ' ')) {
 865                 if (month_n >= 1 && month_n <= 12) {
 866                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 867                         if (zonestr[0] == 'z' || zonestr[0] == 'Z') {
 868                                 strcat(zone, "+00:00");
 869                         } else if (sscanf(zonestr, "%c%2d:%2d",
 870                                                 &offset_sign, &zone1, &zone2) == 3) {
 871                                 strcat(zone, zonestr);
 872                         }
 873                         return 0;
 874                 }
 875         }
 876
 877         *zone = '\0';
 878
 879         /* RFC3339 subset */
 880         /* This particular "subset" is invalid, RFC requires the time offset */
 881         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d",
 882                         year, &month_n, day, hh, mm, ss);
 883         if (result == 6) {
 884                 if (1 <= month_n && month_n <= 12) {
 885                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 886                         return 0;
 887                 }
 888         }
 889
 890         return -1;
 891 }
 892
 893 /*
 894  * Hiro, most UNIXen support this function:
 895  * http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getdate
 896  */
 897 gboolean procheader_date_parse_to_tm(const gchar *src, struct tm *t, char *zone)
 898 {
 899         gchar weekday[11];
 900         gint day;
 901         gchar month[10];
 902         gint year;
 903         gint hh, mm, ss;
 904         GDateMonth dmonth;
 905         gchar *p;
 906
 907         if (!t)
 908                 return FALSE;
 909
 910         memset(t, 0, sizeof *t);
 911
 912         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 913                                         &hh, &mm, &ss, zone) < 0) {
 914                 g_warning("Invalid date: %s", src);
 915                 return FALSE;
 916         }
 917
 918         /* Y2K compliant :) */
 919         if (year < 100) {
 920                 if (year < 70)
 921                         year += 2000;
 922                 else
 923                         year += 1900;
 924         }
 925
 926         month[3] = '\0';
 927         if ((p = strstr(monthstr, month)) != NULL)
 928                 dmonth = (gint)(p - monthstr) / 3 + 1;
 929         else {
 930                 g_warning("Invalid month: %s", month);
 931                 dmonth = G_DATE_BAD_MONTH;
 932         }
 933
 934         t->tm_sec = ss;
 935         t->tm_min = mm;
 936         t->tm_hour = hh;
 937         t->tm_mday = day;
 938         t->tm_mon = dmonth - 1;
 939         t->tm_year = year - 1900;
 940         t->tm_wday = 0;
 941         t->tm_yday = 0;
 942         t->tm_isdst = -1;
 943
 944         mktime(t);
 945
 946         return TRUE;
 947 }
 948
 949 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 950 {
 951         gchar weekday[11];
 952         gint day;
 953         gchar month[10];
 954         gint year;
 955         gint hh, mm, ss;
 956         gchar zone[7];
 957         GDateMonth dmonth = G_DATE_BAD_MONTH;
 958         struct tm t;
 959         gchar *p;
 960         time_t timer;
 961         time_t tz_offset;
 962
 963         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 964                                         &hh, &mm, &ss, zone) < 0) {
 965                 if (dest && len > 0)
 966                         strncpy2(dest, src, len);
 967                 return 0;
 968         }
 969
 970         /* Y2K compliant :) */
 971         if (year < 1000) {
 972                 if (year < 50)
 973                         year += 2000;
 974                 else
 975                         year += 1900;
 976         }
 977
 978         month[3] = '\0';
 979         for (p = monthstr; *p != '\0'; p += 3) {
 980                 if (!g_ascii_strncasecmp(p, month, 3)) {
 981                         dmonth = (gint)(p - monthstr) / 3 + 1;
 982                         break;
 983                 }
 984         }
 985
 986         t.tm_sec = ss;
 987         t.tm_min = mm;
 988         t.tm_hour = hh;
 989         t.tm_mday = day;
 990         t.tm_mon = dmonth - 1;
 991         t.tm_year = year - 1900;
 992         t.tm_wday = 0;
 993         t.tm_yday = 0;
 994         t.tm_isdst = -1;
 995
 996         timer = mktime(&t);
 997         tz_offset = remote_tzoffset_sec(zone);
 998         if (tz_offset != -1)
 999                 timer += tzoffset_sec(&timer) - tz_offset;
1000
1001         if (dest)
1002                 procheader_date_get_localtime(dest, len, timer);
1003
1004         return timer;
1005 }
1006
1007 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
1008 {
1009         struct tm *lt;
1010         gchar *default_format = "%y/%m/%d(%a) %H:%M";
1011         gchar *str;
1012         const gchar *src_codeset, *dest_codeset;
1013         struct tm buf;
1014
1015         if (timer > 0)
1016                 lt = localtime_r(&timer, &buf);
1017         else {
1018                 time_t dummy = 1;
1019                 lt = localtime_r(&dummy, &buf);
1020         }
1021
1022         if (prefs_common.date_format)
1023                 fast_strftime(dest, len, prefs_common.date_format, lt);
1024         else
1025                 fast_strftime(dest, len, default_format, lt);
1026
1027         if (!g_utf8_validate(dest, -1, NULL)) {
1028                 src_codeset = conv_get_locale_charset_str_no_utf8();
1029                 dest_codeset = CS_UTF_8;
1030                 str = conv_codeset_strdup(dest, src_codeset, dest_codeset);
1031                 if (str) {
1032                         strncpy2(dest, str, len);
1033                         g_free(str);
1034                 }
1035         }
1036 }
1037
1038 /* Added by Mel Hadasht on 27 Aug 2001 */
1039 /* Get a header from msginfo */
1040 gint procheader_get_header_from_msginfo(MsgInfo *msginfo, gchar *buf, gint len, gchar *header)
1041 {
1042         gchar *file;
1043         FILE *fp;
1044         HeaderEntry hentry[]={ { NULL, NULL, TRUE  },
1045                                { NULL, NULL, FALSE } };
1046         gint val;
1047
1048         hentry[0].name = header;
1049
1050         cm_return_val_if_fail(msginfo != NULL, -1);
1051         file = procmsg_get_message_file_path(msginfo);
1052         if ((fp = g_fopen(file, "rb")) == NULL) {
1053                FILE_OP_ERROR(file, "fopen");
1054                g_free(file);
1055                return -1;
1056         }
1057         val = procheader_get_one_field(buf,len, fp, hentry);
1058         if (fclose(fp) == EOF) {
1059                 FILE_OP_ERROR(file, "fclose");
1060                 claws_unlink(file);
1061                 g_free(file);
1062                 return -1;
1063         }
1064
1065         g_free(file);
1066         if (val == -1)
1067                 return -1;
1068
1069         return 0;
1070 }
1071
1072 HeaderEntry *procheader_entries_from_str(const gchar *str)
1073 {
1074         HeaderEntry *entries = NULL, *he;
1075         int numh = 0, i = 0;
1076         gchar **names = NULL;
1077         const gchar *s = str;
1078
1079         if (s == NULL) {
1080                 return NULL;
1081         }
1082         while (*s != '\0') {
1083                 if (*s == ' ') ++numh;
1084                 ++s;
1085         }
1086         if (numh == 0) {
1087                 return NULL;
1088         }
1089         entries = g_new0(HeaderEntry, numh + 1); /* room for last NULL */
1090         s = str;
1091         ++s; /* skip first space */
1092         names = g_strsplit(s, " ", numh);
1093         he = entries;
1094         while (names[i]) {
1095                 he->name = g_strdup_printf("%s:", names[i]);
1096                 he->body = NULL;
1097                 he->unfold = FALSE;
1098                 ++i, ++he;
1099         }
1100         he->name = NULL;
1101         g_strfreev(names);
1102         return entries;
1103 }
1104
1105 void procheader_entries_free (HeaderEntry *entries)
1106 {
1107         if (entries != NULL) {
1108                 HeaderEntry *he = entries;
1109                 while (he->name != NULL) {
1110                         g_free(he->name);
1111                         if (he->body != NULL)
1112                                 g_free(he->body);
1113                         ++he;
1114                 }
1115                 g_free(entries);
1116         }
1117 }
1118
1119 gboolean procheader_header_is_internal(const gchar *hdr_name)
1120 {
1121         const gchar *internal_hdrs[] = {
1122                 "AF:", "NF:", "PS:", "SRH:", "SFN:", "DSR:", "MID:", "CFG:",
1123                 "PT:", "S:", "RQ:", "SSV:", "NSV:", "SSH:", "R:", "MAID:",
1124                 "SCF:", "RMID:", "FMID:", "NAID:",
1125                 "X-Claws-Account-Id:",
1126                 "X-Claws-Sign:",
1127                 "X-Claws-Encrypt:",
1128                 "X-Claws-Privacy-System:",
1129                 "X-Claws-Auto-Wrapping:",
1130                 "X-Claws-Auto-Indent:",
1131                 "X-Claws-End-Special-Headers:",
1132                 "X-Sylpheed-Account-Id:",
1133                 "X-Sylpheed-Sign:",
1134                 "X-Sylpheed-Encrypt:",
1135                 "X-Sylpheed-Privacy-System:",
1136                 "X-Sylpheed-End-Special-Headers:",
1137                  NULL
1138         };
1139         int i;
1140
1141         for (i = 0; internal_hdrs[i]; i++) {
1142                 if (!strcmp(hdr_name, internal_hdrs[i]))
1143                         return TRUE;
1144         }
1145         return FALSE;
1146 }