src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 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         struct stat 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          = 1,
 377         H_TO            = 2,
 378         H_CC            = 3,
 379         H_NEWSGROUPS    = 4,
 380         H_SUBJECT       = 5,
 381         H_MSG_ID        = 6,
 382         H_REFERENCES    = 7,
 383         H_IN_REPLY_TO   = 8,
 384         H_CONTENT_TYPE  = 9,
 385         H_SEEN          = 10,
 386         H_STATUS        = 11,
 387         H_X_STATUS      = 12,
 388         H_FROM_SPACE    = 13,
 389         H_SC_PLANNED_DOWNLOAD = 14,
 390         H_SC_MESSAGE_SIZE = 15,
 391         H_FACE          = 16,
 392         H_X_FACE        = 17,
 393         H_DISPOSITION_NOTIFICATION_TO = 18,
 394         H_RETURN_RECEIPT_TO = 19,
 395         H_SC_PARTIALLY_RETRIEVED = 20,
 396         H_SC_ACCOUNT_SERVER = 21,
 397         H_SC_ACCOUNT_LOGIN = 22,
 398         H_LIST_POST        = 23,
 399         H_LIST_SUBSCRIBE   = 24,
 400         H_LIST_UNSUBSCRIBE = 25,
 401         H_LIST_HELP        = 26,
 402         H_LIST_ARCHIVE     = 27,
 403         H_LIST_OWNER       = 28,
 404 };
 405
 406 static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 407                                    {"From:",            NULL, TRUE},
 408                                    {"To:",              NULL, TRUE},
 409                                    {"Cc:",              NULL, TRUE},
 410                                    {"Newsgroups:",      NULL, TRUE},
 411                                    {"Subject:",         NULL, TRUE},
 412                                    {"Message-ID:",      NULL, FALSE},
 413                                    {"References:",      NULL, FALSE},
 414                                    {"In-Reply-To:",     NULL, FALSE},
 415                                    {"Content-Type:",    NULL, FALSE},
 416                                    {"Seen:",            NULL, FALSE},
 417                                    {"Status:",          NULL, FALSE},
 418                                    {"X-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                                    {NULL,               NULL, FALSE}};
 436
 437 static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 438                                     {"From:",           NULL, TRUE},
 439                                     {"To:",             NULL, TRUE},
 440                                     {"Cc:",             NULL, TRUE},
 441                                     {"Newsgroups:",     NULL, TRUE},
 442                                     {"Subject:",        NULL, TRUE},
 443                                     {"Message-ID:",     NULL, FALSE},
 444                                     {"References:",     NULL, FALSE},
 445                                     {"In-Reply-To:",    NULL, FALSE},
 446                                     {"Content-Type:",   NULL, FALSE},
 447                                     {"Seen:",           NULL, FALSE},
 448                                     {"Status:",         NULL, FALSE},
 449                                     {"X-Status:",       NULL, FALSE},
 450                                     {"From ",           NULL, FALSE},
 451                                     {"SC-Marked-For-Download:", NULL, FALSE},
 452                                     {"SC-Message-Size:",NULL, FALSE},
 453                                     {NULL,              NULL, FALSE}};
 454
 455 static HeaderEntry* procheader_get_headernames(gboolean full)
 456 {
 457         return full ? hentry_full : hentry_short;
 458 }
 459
 460 MsgInfo *procheader_parse_stream(FILE *fp, MsgFlags flags, gboolean full,
 461                                  gboolean decrypted)
 462 {
 463         return parse_stream(fp, FALSE, flags, full, decrypted);
 464 }
 465
 466 static gboolean avatar_from_some_face(gpointer source, gpointer userdata)
 467 {
 468         AvatarCaptureData *acd = (AvatarCaptureData *)source;
 469
 470         if (*(acd->content) == '\0') /* won't be null, but may be empty */
 471                 return FALSE;
 472
 473         if (!strcmp(acd->header, hentry_full[H_FACE].name)) {
 474                 debug_print("avatar_from_some_face: found 'Face' header\n");
 475                 procmsg_msginfo_add_avatar(acd->msginfo, AVATAR_FACE, acd->content);
 476         }
 477 #if HAVE_LIBCOMPFACE
 478         else if (!strcmp(acd->header, hentry_full[H_X_FACE].name)) {
 479                 debug_print("avatar_from_some_face: found 'X-Face' header\n");
 480                 procmsg_msginfo_add_avatar(acd->msginfo, AVATAR_XFACE, acd->content);
 481         }
 482 #endif
 483         return FALSE;
 484 }
 485
 486 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
 487                              gboolean full, gboolean decrypted)
 488 {
 489         MsgInfo *msginfo;
 490         gchar buf[BUFFSIZE];
 491         gchar *p, *tmp;
 492         gchar *hp;
 493         HeaderEntry *hentry;
 494         gint hnum;
 495         void *orig_data = data;
 496         guint hook_id = -1;
 497
 498         get_one_field_func get_one_field =
 499                 isstring ? (get_one_field_func)string_get_one_field
 500                          : (get_one_field_func)procheader_get_one_field;
 501
 502         hentry = procheader_get_headernames(full);
 503
 504         if (MSG_IS_QUEUED(flags) || MSG_IS_DRAFT(flags)) {
 505                 while (get_one_field(buf, sizeof(buf), data, NULL) != -1) {
 506                         if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
 507                                 strlen("X-Claws-End-Special-Headers:"))) ||
 508                             (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
 509                                 strlen("X-Sylpheed-End-Special-Headers:"))))
 510                                 break;
 511                         /* from other mailers */
 512                         if (!strncmp(buf, "Date: ", 6)
 513                         ||  !strncmp(buf, "To: ", 4)
 514                         ||  !strncmp(buf, "From: ", 6)
 515                         ||  !strncmp(buf, "Subject: ", 9)) {
 516                                 if (isstring)
 517                                         data = orig_data;
 518                                 else
 519                                         rewind((FILE *)data);
 520                                 break;
 521                         }
 522                 }
 523         }
 524
 525         msginfo = procmsg_msginfo_new();
 526
 527         if (flags.tmp_flags || flags.perm_flags)
 528                 msginfo->flags = flags;
 529         else
 530                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_NEW | MSG_UNREAD);
 531
 532         msginfo->inreplyto = NULL;
 533
 534         if (prefs_common.enable_avatars | AVATARS_ENABLE_CAPTURE) {
 535                 hook_id = hooks_register_hook(AVATAR_HEADER_UPDATE_HOOKLIST, avatar_from_some_face, NULL);
 536         }
 537
 538         while ((hnum = get_one_field(buf, sizeof(buf), data, hentry))
 539                != -1) {
 540                 hp = buf + strlen(hentry[hnum].name);
 541                 while (*hp == ' ' || *hp == '\t') hp++;
 542
 543                 switch (hnum) {
 544                 case H_DATE:
 545                         if (msginfo->date) break;
 546                         msginfo->date_t =
 547                                 procheader_date_parse(NULL, hp, 0);
 548                         if (g_utf8_validate(hp, -1, NULL)) {
 549                                 msginfo->date = g_strdup(hp);
 550                         } else {
 551                                 gchar *utf = conv_codeset_strdup(
 552                                         hp,
 553                                         conv_get_locale_charset_str_no_utf8(),
 554                                         CS_INTERNAL);
 555                                 if (utf == NULL ||
 556                                     !g_utf8_validate(utf, -1, NULL)) {
 557                                         g_free(utf);
 558                                         utf = g_malloc(strlen(buf)*2+1);
 559                                         conv_localetodisp(utf,
 560                                                 strlen(hp)*2+1, hp);
 561                                 }
 562                                 msginfo->date = utf;
 563                         }
 564                         break;
 565                 case H_FROM:
 566                         if (msginfo->from) break;
 567                         msginfo->from = conv_unmime_header(hp, NULL, TRUE);
 568                         msginfo->fromname = procheader_get_fromname(msginfo->from);
 569                         remove_return(msginfo->from);
 570                         remove_return(msginfo->fromname);
 571                         break;
 572                 case H_TO:
 573                         tmp = conv_unmime_header(hp, NULL, TRUE);
 574                         remove_return(tmp);
 575                         if (msginfo->to) {
 576                                 p = msginfo->to;
 577                                 msginfo->to =
 578                                         g_strconcat(p, ", ", tmp, NULL);
 579                                 g_free(p);
 580                         } else
 581                                 msginfo->to = g_strdup(tmp);
 582                         g_free(tmp);
 583                         break;
 584                 case H_CC:
 585                         tmp = conv_unmime_header(hp, NULL, TRUE);
 586                         remove_return(tmp);
 587                         if (msginfo->cc) {
 588                                 p = msginfo->cc;
 589                                 msginfo->cc =
 590                                         g_strconcat(p, ", ", tmp, NULL);
 591                                 g_free(p);
 592                         } else
 593                                 msginfo->cc = g_strdup(tmp);
 594                         g_free(tmp);
 595                         break;
 596                 case H_NEWSGROUPS:
 597                         if (msginfo->newsgroups) {
 598                                 p = msginfo->newsgroups;
 599                                 msginfo->newsgroups =
 600                                         g_strconcat(p, ",", hp, NULL);
 601                                 g_free(p);
 602                         } else
 603                                 msginfo->newsgroups = g_strdup(hp);
 604                         break;
 605                 case H_SUBJECT:
 606                         if (msginfo->subject) break;
 607                         msginfo->subject = conv_unmime_header(hp, NULL, FALSE);
 608                         unfold_line(msginfo->subject);
 609                        break;
 610                 case H_MSG_ID:
 611                         if (msginfo->msgid) break;
 612
 613                         extract_parenthesis(hp, '<', '>');
 614                         remove_space(hp);
 615                         msginfo->msgid = g_strdup(hp);
 616                         break;
 617                 case H_REFERENCES:
 618                         msginfo->references =
 619                                 references_list_prepend(msginfo->references,
 620                                                         hp);
 621                         break;
 622                 case H_IN_REPLY_TO:
 623                         if (msginfo->inreplyto) break;
 624
 625                         eliminate_parenthesis(hp, '(', ')');
 626                         if ((p = strrchr(hp, '<')) != NULL &&
 627                             strchr(p + 1, '>') != NULL) {
 628                                 extract_parenthesis(p, '<', '>');
 629                                 remove_space(p);
 630                                 if (*p != '\0')
 631                                         msginfo->inreplyto = g_strdup(p);
 632                         }
 633                         break;
 634                 case H_CONTENT_TYPE:
 635                         if (!g_ascii_strncasecmp(hp, "multipart/", 10))
 636                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_MULTIPART);
 637                         break;
 638 #ifdef ALLOW_HEADER_HINT
 639                 case H_SEEN:
 640                         /* mnews Seen header */
 641                         MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 642                         break;
 643 #endif
 644                 case H_DISPOSITION_NOTIFICATION_TO:
 645                         if (!msginfo->extradata)
 646                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 647                         if (msginfo->extradata->dispositionnotificationto) break;
 648                         msginfo->extradata->dispositionnotificationto = g_strdup(hp);
 649                         break;
 650                 case H_RETURN_RECEIPT_TO:
 651                         if (!msginfo->extradata)
 652                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 653                         if (msginfo->extradata->returnreceiptto) break;
 654                         msginfo->extradata->returnreceiptto = g_strdup(hp);
 655                         break;
 656 /* partial download infos */
 657                 case H_SC_PARTIALLY_RETRIEVED:
 658                         if (!msginfo->extradata)
 659                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 660                         if (msginfo->extradata->partial_recv) break;
 661                         msginfo->extradata->partial_recv = g_strdup(hp);
 662                         break;
 663                 case H_SC_ACCOUNT_SERVER:
 664                         if (!msginfo->extradata)
 665                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 666                         if (msginfo->extradata->account_server) break;
 667                         msginfo->extradata->account_server = g_strdup(hp);
 668                         break;
 669                 case H_SC_ACCOUNT_LOGIN:
 670                         if (!msginfo->extradata)
 671                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 672                         if (msginfo->extradata->account_login) break;
 673                         msginfo->extradata->account_login = g_strdup(hp);
 674                         break;
 675                 case H_SC_MESSAGE_SIZE:
 676                         if (msginfo->total_size) break;
 677                         msginfo->total_size = atoi(hp);
 678                         break;
 679                 case H_SC_PLANNED_DOWNLOAD:
 680                         msginfo->planned_download = atoi(hp);
 681                         break;
 682 /* end partial download infos */
 683 #ifdef ALLOW_HEADER_HINT
 684                 case H_STATUS:
 685                         if (strchr(hp, 'R') != NULL)
 686                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 687                         if (strchr(hp, 'O') != NULL)
 688                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW);
 689                         if (strchr(hp, 'U') != NULL)
 690                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 691                         break;
 692                 case H_X_STATUS:
 693                         if (strchr(hp, 'D') != NULL)
 694                                 MSG_SET_PERM_FLAGS(msginfo->flags,
 695                                               MSG_REALLY_DELETED);
 696                         if (strchr(hp, 'F') != NULL)
 697                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_MARKED);
 698                         if (strchr(hp, 'd') != NULL)
 699                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_DELETED);
 700                         if (strchr(hp, 'r') != NULL)
 701                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_REPLIED);
 702                         if (strchr(hp, 'f') != NULL)
 703                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_FORWARDED);
 704                         break;
 705 #endif
 706                 case H_FROM_SPACE:
 707                         if (msginfo->fromspace) break;
 708                         msginfo->fromspace = g_strdup(hp);
 709                         remove_return(msginfo->fromspace);
 710                         break;
 711 /* list infos */
 712                 case H_LIST_POST:
 713                         if (!msginfo->extradata)
 714                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 715                         if (msginfo->extradata->list_post) break;
 716                         msginfo->extradata->list_post = g_strdup(hp);
 717                         break;
 718                 case H_LIST_SUBSCRIBE:
 719                         if (!msginfo->extradata)
 720                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 721                         if (msginfo->extradata->list_subscribe) break;
 722                         msginfo->extradata->list_subscribe = g_strdup(hp);
 723                         break;
 724                 case H_LIST_UNSUBSCRIBE:
 725                         if (!msginfo->extradata)
 726                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 727                         if (msginfo->extradata->list_unsubscribe) break;
 728                         msginfo->extradata->list_unsubscribe = g_strdup(hp);
 729                         break;
 730                 case H_LIST_HELP:
 731                         if (!msginfo->extradata)
 732                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 733                         if (msginfo->extradata->list_help) break;
 734                         msginfo->extradata->list_help = g_strdup(hp);
 735                         break;
 736                 case H_LIST_ARCHIVE:
 737                         if (!msginfo->extradata)
 738                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 739                         if (msginfo->extradata->list_archive) break;
 740                         msginfo->extradata->list_archive = g_strdup(hp);
 741                         break;
 742                 case H_LIST_OWNER:
 743                         if (!msginfo->extradata)
 744                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 745                         if (msginfo->extradata->list_owner) break;
 746                         msginfo->extradata->list_owner = g_strdup(hp);
 747                         break;
 748 /* end list infos */
 749                 default:
 750                         break;
 751                 }
 752                 /* to avoid performance penalty hooklist is invoked only for
 753                    headers known to be able to generate avatars */
 754                 if (hnum == H_FROM || hnum == H_X_FACE || hnum == H_FACE) {
 755                         AvatarCaptureData *acd = g_new0(AvatarCaptureData, 1);
 756                         /* no extra memory is wasted, hooks are expected to
 757                            take care of copying members when needed */
 758                         acd->msginfo = msginfo;
 759                         acd->header  = hentry_full[hnum].name;
 760                         acd->content = hp;
 761                         hooks_invoke(AVATAR_HEADER_UPDATE_HOOKLIST, (gpointer)acd);
 762                         g_free(acd);
 763                 }
 764         }
 765
 766         if (!msginfo->inreplyto && msginfo->references)
 767                 msginfo->inreplyto =
 768                         g_strdup((gchar *)msginfo->references->data);
 769
 770         if (hook_id != -1) {
 771                 hooks_unregister_hook(AVATAR_HEADER_UPDATE_HOOKLIST, hook_id);
 772         }
 773
 774         return msginfo;
 775 }
 776
 777 gchar *procheader_get_fromname(const gchar *str)
 778 {
 779         gchar *tmp, *name;
 780
 781         Xstrdup_a(tmp, str, return NULL);
 782
 783         if (*tmp == '\"') {
 784                 extract_quote(tmp, '\"');
 785                 g_strstrip(tmp);
 786         } else if (strchr(tmp, '<')) {
 787                 eliminate_parenthesis(tmp, '<', '>');
 788                 g_strstrip(tmp);
 789                 if (*tmp == '\0') {
 790                         strcpy(tmp, str);
 791                         extract_parenthesis(tmp, '<', '>');
 792                         g_strstrip(tmp);
 793                 }
 794         } else if (strchr(tmp, '(')) {
 795                 extract_parenthesis(tmp, '(', ')');
 796                 g_strstrip(tmp);
 797         }
 798
 799         if (*tmp == '\0')
 800                 name = g_strdup(str);
 801         else
 802                 name = g_strdup(tmp);
 803
 804         return name;
 805 }
 806
 807 static gint procheader_scan_date_string(const gchar *str,
 808                                         gchar *weekday, gint *day,
 809                                         gchar *month, gint *year,
 810                                         gint *hh, gint *mm, gint *ss,
 811                                         gchar *zone)
 812 {
 813         gint result;
 814         gint month_n;
 815         gchar zone1[3];
 816         gchar zone2[3];
 817
 818         if (str == NULL)
 819                 return -1;
 820
 821         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d %5s",
 822                         weekday, day, month, year, hh, mm, ss, zone);
 823         if (result == 8) return 0;
 824
 825         /* RFC2822 */
 826         result = sscanf(str, "%3s,%d %9s %d %2d:%2d:%2d %5s",
 827                         weekday, day, month, year, hh, mm, ss, zone);
 828         if (result == 8) return 0;
 829
 830         result = sscanf(str, "%d %9s %d %2d:%2d:%2d %5s",
 831                         day, month, year, hh, mm, ss, zone);
 832         if (result == 7) return 0;
 833
 834         *zone = '\0';
 835         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d",
 836                         weekday, day, month, year, hh, mm, ss);
 837         if (result == 7) return 0;
 838
 839         result = sscanf(str, "%d %9s %d %2d:%2d:%2d",
 840                         day, month, year, hh, mm, ss);
 841         if (result == 6) return 0;
 842
 843         *ss = 0;
 844         result = sscanf(str, "%10s %d %9s %d %2d:%2d %5s",
 845                         weekday, day, month, year, hh, mm, zone);
 846         if (result == 7) return 0;
 847
 848         result = sscanf(str, "%d %9s %d %2d:%2d %5s",
 849                         day, month, year, hh, mm, zone);
 850         if (result == 6) return 0;
 851
 852         *zone = '\0';
 853         result = sscanf(str, "%10s %d %9s %d %2d:%2d",
 854                         weekday, day, month, year, hh, mm);
 855         if (result == 6) return 0;
 856
 857         result = sscanf(str, "%d %9s %d %2d:%2d",
 858                         day, month, year, hh, mm);
 859         if (result == 5) return 0;
 860
 861         /* RFC3339 subset */
 862         *weekday = '\0';
 863         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d+%2s:%2s",
 864                         year, &month_n, day, hh, mm, ss, zone1, zone2);
 865         if (result == 8) {
 866                 if (1 <= month_n && month_n <= 12) {
 867                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 868                         *zone = '+';
 869                         strncpy2(zone+1, zone1, 3);
 870                         strncpy2(zone+3, zone2, 3);
 871                         return 0;
 872                 }
 873         }
 874
 875         /* RFC3339 subset */
 876         *zone = '\0';
 877         *weekday = '\0';
 878         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d",
 879                         year, &month_n, day, hh, mm, ss);
 880         if (result == 6) {
 881                 if (1 <= month_n && month_n <= 12) {
 882                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 883                         return 0;
 884                 }
 885         }
 886
 887         return -1;
 888 }
 889
 890 /*
 891  * Hiro, most UNIXen support this function:
 892  * http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getdate
 893  */
 894 gboolean procheader_date_parse_to_tm(const gchar *src, struct tm *t, char *zone)
 895 {
 896         gchar weekday[11];
 897         gint day;
 898         gchar month[10];
 899         gint year;
 900         gint hh, mm, ss;
 901         GDateMonth dmonth;
 902         gchar *p;
 903
 904         if (!t)
 905                 return FALSE;
 906
 907         memset(t, 0, sizeof *t);
 908
 909         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 910                                         &hh, &mm, &ss, zone) < 0) {
 911                 g_warning("Invalid date: %s\n", src);
 912                 return FALSE;
 913         }
 914
 915         /* Y2K compliant :) */
 916         if (year < 100) {
 917                 if (year < 70)
 918                         year += 2000;
 919                 else
 920                         year += 1900;
 921         }
 922
 923         month[3] = '\0';
 924         if ((p = strstr(monthstr, month)) != NULL)
 925                 dmonth = (gint)(p - monthstr) / 3 + 1;
 926         else {
 927                 g_warning("Invalid month: %s\n", month);
 928                 dmonth = G_DATE_BAD_MONTH;
 929         }
 930
 931         t->tm_sec = ss;
 932         t->tm_min = mm;
 933         t->tm_hour = hh;
 934         t->tm_mday = day;
 935         t->tm_mon = dmonth - 1;
 936         t->tm_year = year - 1900;
 937         t->tm_wday = 0;
 938         t->tm_yday = 0;
 939         t->tm_isdst = -1;
 940
 941         mktime(t);
 942
 943         return TRUE;
 944 }
 945
 946 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 947 {
 948         gchar weekday[11];
 949         gint day;
 950         gchar month[10];
 951         gint year;
 952         gint hh, mm, ss;
 953         gchar zone[6];
 954         GDateMonth dmonth = G_DATE_BAD_MONTH;
 955         struct tm t;
 956         gchar *p;
 957         time_t timer;
 958         time_t tz_offset;
 959
 960         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 961                                         &hh, &mm, &ss, zone) < 0) {
 962                 if (dest && len > 0)
 963                         strncpy2(dest, src, len);
 964                 return 0;
 965         }
 966
 967         /* Y2K compliant :) */
 968         if (year < 1000) {
 969                 if (year < 50)
 970                         year += 2000;
 971                 else
 972                         year += 1900;
 973         }
 974
 975         month[3] = '\0';
 976         for (p = monthstr; *p != '\0'; p += 3) {
 977                 if (!g_ascii_strncasecmp(p, month, 3)) {
 978                         dmonth = (gint)(p - monthstr) / 3 + 1;
 979                         break;
 980                 }
 981         }
 982
 983         t.tm_sec = ss;
 984         t.tm_min = mm;
 985         t.tm_hour = hh;
 986         t.tm_mday = day;
 987         t.tm_mon = dmonth - 1;
 988         t.tm_year = year - 1900;
 989         t.tm_wday = 0;
 990         t.tm_yday = 0;
 991         t.tm_isdst = -1;
 992
 993         timer = mktime(&t);
 994         tz_offset = remote_tzoffset_sec(zone);
 995         if (tz_offset != -1)
 996                 timer += tzoffset_sec(&timer) - tz_offset;
 997
 998         if (dest)
 999                 procheader_date_get_localtime(dest, len, timer);
1000
1001         return timer;
1002 }
1003
1004 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
1005 {
1006         struct tm *lt;
1007         gchar *default_format = "%y/%m/%d(%a) %H:%M";
1008         gchar *str;
1009         const gchar *src_codeset, *dest_codeset;
1010         struct tm buf;
1011
1012         if (timer > 0)
1013                 lt = localtime_r(&timer, &buf);
1014         else {
1015                 time_t dummy = 1;
1016                 lt = localtime_r(&dummy, &buf);
1017         }
1018
1019         if (prefs_common.date_format)
1020                 fast_strftime(dest, len, prefs_common.date_format, lt);
1021         else
1022                 fast_strftime(dest, len, default_format, lt);
1023
1024         if (!g_utf8_validate(dest, -1, NULL)) {
1025                 src_codeset = conv_get_locale_charset_str_no_utf8();
1026                 dest_codeset = CS_UTF_8;
1027                 str = conv_codeset_strdup(dest, src_codeset, dest_codeset);
1028                 if (str) {
1029                         strncpy2(dest, str, len);
1030                         g_free(str);
1031                 }
1032         }
1033 }
1034
1035 /* Added by Mel Hadasht on 27 Aug 2001 */
1036 /* Get a header from msginfo */
1037 gint procheader_get_header_from_msginfo(MsgInfo *msginfo, gchar *buf, gint len, gchar *header)
1038 {
1039         gchar *file;
1040         FILE *fp;
1041         HeaderEntry hentry[]={ { NULL, NULL, TRUE  },
1042                                { NULL, NULL, FALSE } };
1043         gint val;
1044
1045         hentry[0].name = header;
1046
1047         cm_return_val_if_fail(msginfo != NULL, -1);
1048         file = procmsg_get_message_file_path(msginfo);
1049         if ((fp = g_fopen(file, "rb")) == NULL) {
1050                FILE_OP_ERROR(file, "fopen");
1051                g_free(file);
1052                return -1;
1053         }
1054         val = procheader_get_one_field(buf,len, fp, hentry);
1055         if (fclose(fp) == EOF) {
1056                 FILE_OP_ERROR(file, "fclose");
1057                 claws_unlink(file);
1058                 g_free(file);
1059                 return -1;
1060         }
1061
1062         g_free(file);
1063         if (val == -1)
1064                 return -1;
1065
1066         return 0;
1067 }
1068
1069 HeaderEntry *procheader_entries_from_str(const gchar *str)
1070 {
1071         HeaderEntry *entries = NULL, *he;
1072         int numh = 0, i = 0;
1073         gchar **names = NULL;
1074         const gchar *s = str;
1075
1076         if (s == NULL) {
1077                 return NULL;
1078         }
1079         while (*s != '\0') {
1080                 if (*s == ' ') ++numh;
1081                 ++s;
1082         }
1083         if (numh == 0) {
1084                 return NULL;
1085         }
1086         entries = g_new0(HeaderEntry, numh + 1); /* room for last NULL */
1087         s = str;
1088         ++s; /* skip first space */
1089         names = g_strsplit(s, " ", numh);
1090         he = entries;
1091         while (names[i]) {
1092                 he->name = g_strdup_printf("%s:", names[i]);
1093                 he->body = NULL;
1094                 he->unfold = FALSE;
1095                 ++i, ++he;
1096         }
1097         he->name = NULL;
1098         g_strfreev(names);
1099         return entries;
1100 }
1101
1102 void procheader_entries_free (HeaderEntry *entries)
1103 {
1104         if (entries != NULL) {
1105                 HeaderEntry *he = entries;
1106                 while (he->name != NULL) {
1107                         g_free(he->name);
1108                         if (he->body != NULL)
1109                                 g_free(he->body);
1110                         ++he;
1111                 }
1112                 g_free(entries);
1113         }
1114 }
1115