src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 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 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <glib/gi18n.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <time.h>
  30 #include <sys/stat.h>
  31
  32 #include "procheader.h"
  33 #include "procmsg.h"
  34 #include "codeconv.h"
  35 #include "prefs_common.h"
  36 #include "utils.h"
  37
  38 #define BUFFSIZE        8192
  39
  40 static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
  41
  42 typedef char *(*getlinefunc) (char *, size_t, void *);
  43 typedef int (*peekcharfunc) (void *);
  44 typedef int (*getcharfunc) (void *);
  45 typedef gint (*get_one_field_func) (gchar *, size_t, void *, HeaderEntry[]);
  46
  47 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  48                                  HeaderEntry hentry[]);
  49
  50 static char *string_getline(char *buf, size_t len, char **str);
  51 static int string_peekchar(char **str);
  52 static int file_peekchar(FILE *fp);
  53 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
  54                                   HeaderEntry hentry[],
  55                                   getlinefunc getline,
  56                                   peekcharfunc peekchar,
  57                                   gboolean unfold);
  58 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
  59                              gboolean full, gboolean decrypted);
  60
  61
  62 gint procheader_get_one_field(gchar *buf, size_t len, FILE *fp,
  63                               HeaderEntry hentry[])
  64 {
  65         return generic_get_one_field(buf, len, fp, hentry,
  66                                      (getlinefunc)fgets_crlf, (peekcharfunc)file_peekchar,
  67                                      TRUE);
  68 }
  69
  70 static gint string_get_one_field(gchar *buf, size_t len, char **str,
  71                                  HeaderEntry hentry[])
  72 {
  73         return generic_get_one_field(buf, len, str, hentry,
  74                                      (getlinefunc)string_getline,
  75                                      (peekcharfunc)string_peekchar,
  76                                      TRUE);
  77 }
  78
  79 static char *string_getline(char *buf, size_t len, char **str)
  80 {
  81         gboolean is_cr = FALSE;
  82         gboolean last_was_cr = FALSE;
  83
  84         if (!*str || !**str)
  85                 return NULL;
  86
  87         for (; **str && len > 1; --len) {
  88                 is_cr = (**str == '\r');
  89                 if ((*buf++ = *(*str)++) == '\n') {
  90                     break;
  91                 }
  92                 if (last_was_cr) {
  93                         *(--buf) = '\n';
  94                         buf++;
  95                     break;
  96                 }
  97                 last_was_cr = is_cr;
  98         }
  99
 100         *buf = '\0';
 101
 102         return buf;
 103 }
 104
 105 static int string_peekchar(char **str)
 106 {
 107         return **str;
 108 }
 109
 110 static int file_peekchar(FILE *fp)
 111 {
 112         return ungetc(getc(fp), fp);
 113 }
 114
 115 static gint generic_get_one_field(gchar *buf, size_t len, void *data,
 116                           HeaderEntry *hentry,
 117                           getlinefunc getline, peekcharfunc peekchar,
 118                           gboolean unfold)
 119 {
 120         gint nexthead;
 121         gint hnum = 0;
 122         HeaderEntry *hp = NULL;
 123
 124         if (hentry != NULL) {
 125                 /* skip non-required headers */
 126                 do {
 127                         do {
 128                                 if (getline(buf, len, data) == NULL)
 129                                         return -1;
 130                                 if (buf[0] == '\r' || buf[0] == '\n')
 131                                         return -1;
 132                         } while (buf[0] == ' ' || buf[0] == '\t');
 133
 134                         for (hp = hentry, hnum = 0; hp->name != NULL;
 135                              hp++, hnum++) {
 136                                 if (!g_ascii_strncasecmp(hp->name, buf,
 137                                                  strlen(hp->name)))
 138                                         break;
 139                         }
 140                 } while (hp->name == NULL);
 141         } else {
 142                 if (getline(buf, len, data) == NULL) return -1;
 143                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
 144         }
 145
 146         /* unfold line */
 147         while (1) {
 148                 nexthead = peekchar(data);
 149                 /* ([*WSP CRLF] 1*WSP) */
 150                 if (nexthead == ' ' || nexthead == '\t') {
 151                         size_t buflen;
 152                         gboolean skiptab = (nexthead == '\t');
 153                         /* trim previous trailing \n if requesting one header or
 154                          * unfolding was requested */
 155                         if ((!hentry && unfold) || (hp && hp->unfold))
 156                                 strretchomp(buf);
 157
 158                         buflen = strlen(buf);
 159
 160                         /* concatenate next line */
 161                         if ((len - buflen) > 2) {
 162                                 if (getline(buf + buflen, len - buflen, data) == NULL)
 163                                         break;
 164                                 if (skiptab) { /* replace tab with space */
 165                                         *(buf + buflen) = ' ';
 166                                 }
 167                         } else
 168                                 break;
 169                 } else {
 170                         /* remove trailing new line */
 171                         strretchomp(buf);
 172                         break;
 173                 }
 174         }
 175
 176         return hnum;
 177 }
 178
 179 gint procheader_get_one_field_asis(gchar *buf, size_t len, FILE *fp)
 180 {
 181         return generic_get_one_field(buf, len, fp, NULL,
 182                                      (getlinefunc)fgets_crlf,
 183                                      (peekcharfunc)file_peekchar,
 184                                      FALSE);
 185 }
 186
 187 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 188 {
 189         gchar buf[BUFFSIZE];
 190         GPtrArray *headers;
 191         Header *header;
 192
 193         g_return_val_if_fail(fp != NULL, NULL);
 194
 195         headers = g_ptr_array_new();
 196
 197         while (procheader_get_one_field_asis(buf, sizeof(buf), fp) != -1) {
 198                 if ((header = procheader_parse_header(buf)) != NULL)
 199                         g_ptr_array_add(headers, header);
 200                         /*
 201                 if (*buf == ':') continue;
 202                 for (p = buf; *p && *p != ' '; p++) {
 203                         if (*p == ':') {
 204                                 header = g_new(Header, 1);
 205                                 header->name = g_strndup(buf, p - buf);
 206                                 p++;
 207                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 208                                 header->body = g_strdup(tmp);
 209
 210                                 g_ptr_array_add(headers, header);
 211                                 break;
 212                         }
 213                 }
 214                         */
 215         }
 216
 217         return headers;
 218 }
 219
 220 void procheader_header_array_destroy(GPtrArray *harray)
 221 {
 222         gint i;
 223         Header *header;
 224
 225         for (i = 0; i < harray->len; i++) {
 226                 header = g_ptr_array_index(harray, i);
 227                 procheader_header_free(header);
 228         }
 229
 230         g_ptr_array_free(harray, TRUE);
 231 }
 232
 233 void procheader_header_free(Header *header)
 234 {
 235         if (!header) return;
 236
 237         g_free(header->name);
 238         g_free(header->body);
 239         g_free(header);
 240 }
 241
 242 /*
 243   tests whether two headers' names are equal
 244   remove the trailing ':' or ' ' before comparing
 245 */
 246
 247 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 248 {
 249         int len1;
 250         int len2;
 251
 252         len1 = strlen(hdr1);
 253         len2 = strlen(hdr2);
 254         if (hdr1[len1 - 1] == ':')
 255                 len1--;
 256         if (hdr2[len2 - 1] == ':')
 257                 len2--;
 258         if (len1 != len2)
 259                 return 0;
 260
 261         return (g_ascii_strncasecmp(hdr1, hdr2, len1) == 0);
 262 }
 263
 264 /*
 265   parse headers, for example :
 266   From: dinh@enseirb.fr becomes :
 267   header->name = "From:"
 268   header->body = "dinh@enseirb.fr"
 269  */
 270
 271 Header * procheader_parse_header(gchar * buf)
 272 {
 273         gchar *p = buf;
 274         Header * header;
 275
 276         if ((*buf == ':') || (*buf == ' '))
 277                 return NULL;
 278
 279         for (p = buf; *p ; p++) {
 280                 if ((*p == ':') || (*p == ' ')) {
 281                         header = g_new(Header, 1);
 282                         header->name = g_strndup(buf, p - buf + 1);
 283                         p++;
 284                         while (*p == ' ' || *p == '\t') p++;
 285                         header->body = conv_unmime_header(p, NULL);
 286                         return header;
 287                 }
 288         }
 289         return NULL;
 290 }
 291
 292 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 293 {
 294         gchar buf[BUFFSIZE];
 295         HeaderEntry *hp;
 296         gint hnum;
 297         gchar *p;
 298
 299         if (hentry == NULL) return;
 300
 301         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 302                != -1) {
 303                 hp = hentry + hnum;
 304
 305                 p = buf + strlen(hp->name);
 306                 while (*p == ' ' || *p == '\t') p++;
 307
 308                 if (hp->body == NULL)
 309                         hp->body = g_strdup(p);
 310                 else if (procheader_headername_equal(hp->name, "To") ||
 311                          procheader_headername_equal(hp->name, "Cc")) {
 312                         gchar *tp = hp->body;
 313                         hp->body = g_strconcat(tp, ", ", p, NULL);
 314                         g_free(tp);
 315                 }
 316         }
 317 }
 318
 319 MsgInfo *procheader_parse_file(const gchar *file, MsgFlags flags,
 320                                gboolean full, gboolean decrypted)
 321 {
 322         struct stat s;
 323         FILE *fp;
 324         MsgInfo *msginfo;
 325
 326         if (stat(file, &s) < 0) {
 327                 FILE_OP_ERROR(file, "stat");
 328                 return NULL;
 329         }
 330         if (!S_ISREG(s.st_mode))
 331                 return NULL;
 332
 333         if ((fp = g_fopen(file, "rb")) == NULL) {
 334                 FILE_OP_ERROR(file, "fopen");
 335                 return NULL;
 336         }
 337
 338         msginfo = procheader_parse_stream(fp, flags, full, decrypted);
 339         fclose(fp);
 340
 341         if (msginfo) {
 342                 msginfo->size = s.st_size;
 343                 msginfo->mtime = s.st_mtime;
 344         }
 345
 346         return msginfo;
 347 }
 348
 349 MsgInfo *procheader_parse_str(const gchar *str, MsgFlags flags, gboolean full,
 350                               gboolean decrypted)
 351 {
 352         return parse_stream(&str, TRUE, flags, full, decrypted);
 353 }
 354
 355 enum
 356 {
 357         H_DATE          = 0,
 358         H_FROM          = 1,
 359         H_TO            = 2,
 360         H_CC            = 3,
 361         H_NEWSGROUPS    = 4,
 362         H_SUBJECT       = 5,
 363         H_MSG_ID        = 6,
 364         H_REFERENCES    = 7,
 365         H_IN_REPLY_TO   = 8,
 366         H_CONTENT_TYPE  = 9,
 367         H_SEEN          = 10,
 368         H_STATUS        = 11,
 369         H_X_STATUS      = 12,
 370         H_FROM_SPACE    = 13,
 371         H_SC_PLANNED_DOWNLOAD = 14,
 372         H_SC_MESSAGE_SIZE = 15,
 373         H_FACE          = 16,
 374         H_X_FACE        = 17,
 375         H_DISPOSITION_NOTIFICATION_TO = 18,
 376         H_RETURN_RECEIPT_TO = 19,
 377         H_SC_PARTIALLY_RETRIEVED = 20,
 378         H_SC_ACCOUNT_SERVER = 21,
 379         H_SC_ACCOUNT_LOGIN = 22,
 380         H_LIST_POST        = 23,
 381         H_LIST_SUBSCRIBE   = 24,
 382         H_LIST_UNSUBSCRIBE = 25,
 383         H_LIST_HELP        = 26,
 384         H_LIST_ARCHIVE     = 27,
 385         H_LIST_OWNER       = 28,
 386 };
 387
 388 static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 389                                    {"From:",            NULL, TRUE},
 390                                    {"To:",              NULL, TRUE},
 391                                    {"Cc:",              NULL, TRUE},
 392                                    {"Newsgroups:",      NULL, TRUE},
 393                                    {"Subject:",         NULL, TRUE},
 394                                    {"Message-ID:",      NULL, FALSE},
 395                                    {"References:",      NULL, FALSE},
 396                                    {"In-Reply-To:",     NULL, FALSE},
 397                                    {"Content-Type:",    NULL, FALSE},
 398                                    {"Seen:",            NULL, FALSE},
 399                                    {"Status:",          NULL, FALSE},
 400                                    {"X-Status:",        NULL, FALSE},
 401                                    {"From ",            NULL, FALSE},
 402                                    {"SC-Marked-For-Download:", NULL, FALSE},
 403                                    {"SC-Message-Size:", NULL, FALSE},
 404                                    {"Face:",            NULL, FALSE},
 405                                    {"X-Face:",          NULL, FALSE},
 406                                    {"Disposition-Notification-To:", NULL, FALSE},
 407                                    {"Return-Receipt-To:", NULL, FALSE},
 408                                    {"SC-Partially-Retrieved:", NULL, FALSE},
 409                                    {"SC-Account-Server:", NULL, FALSE},
 410                                    {"SC-Account-Login:",NULL, FALSE},
 411                                    {"List-Post:",       NULL, TRUE},
 412                                    {"List-Subscribe:",  NULL, TRUE},
 413                                    {"List-Unsubscribe:",NULL, TRUE},
 414                                    {"List-Help:",       NULL, TRUE},
 415                                    {"List-Archive:",    NULL, TRUE},
 416                                    {"List-Owner:",      NULL, TRUE},
 417                                    {NULL,               NULL, FALSE}};
 418
 419 static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 420                                     {"From:",           NULL, TRUE},
 421                                     {"To:",             NULL, TRUE},
 422                                     {"Cc:",             NULL, TRUE},
 423                                     {"Newsgroups:",     NULL, TRUE},
 424                                     {"Subject:",        NULL, TRUE},
 425                                     {"Message-ID:",     NULL, FALSE},
 426                                     {"References:",     NULL, FALSE},
 427                                     {"In-Reply-To:",    NULL, FALSE},
 428                                     {"Content-Type:",   NULL, FALSE},
 429                                     {"Seen:",           NULL, FALSE},
 430                                     {"Status:",         NULL, FALSE},
 431                                     {"X-Status:",       NULL, FALSE},
 432                                     {"From ",           NULL, FALSE},
 433                                     {"SC-Marked-For-Download:", NULL, FALSE},
 434                                     {"SC-Message-Size:",NULL, FALSE},
 435                                     {NULL,              NULL, FALSE}};
 436
 437 HeaderEntry* procheader_get_headernames(gboolean full)
 438 {
 439         return full ? hentry_full : hentry_short;
 440 }
 441
 442 MsgInfo *procheader_parse_stream(FILE *fp, MsgFlags flags, gboolean full,
 443                                  gboolean decrypted)
 444 {
 445         return parse_stream(fp, FALSE, flags, full, decrypted);
 446 }
 447
 448 static MsgInfo *parse_stream(void *data, gboolean isstring, MsgFlags flags,
 449                              gboolean full, gboolean decrypted)
 450 {
 451         MsgInfo *msginfo;
 452         gchar buf[BUFFSIZE];
 453         gchar *p, *tmp;
 454         gchar *hp;
 455         HeaderEntry *hentry;
 456         gint hnum;
 457         void *orig_data = data;
 458
 459         get_one_field_func get_one_field =
 460                 isstring ? (get_one_field_func)string_get_one_field
 461                          : (get_one_field_func)procheader_get_one_field;
 462
 463         hentry = procheader_get_headernames(full);
 464
 465         if (MSG_IS_QUEUED(flags) || MSG_IS_DRAFT(flags)) {
 466                 while (get_one_field(buf, sizeof(buf), data, NULL) != -1) {
 467                         if ((!strncmp(buf, "X-Claws-End-Special-Headers: 1",
 468                                 strlen("X-Claws-End-Special-Headers:"))) ||
 469                             (!strncmp(buf, "X-Sylpheed-End-Special-Headers: 1",
 470                                 strlen("X-Sylpheed-End-Special-Headers:"))))
 471                                 break;
 472                         /* from other mailers */
 473                         if (!strncmp(buf, "Date: ", 6)
 474                         ||  !strncmp(buf, "To: ", 4)
 475                         ||  !strncmp(buf, "From: ", 6)
 476                         ||  !strncmp(buf, "Subject: ", 9)) {
 477                                 if (isstring)
 478                                         data = orig_data;
 479                                 else
 480                                         rewind((FILE *)data);
 481                                 break;
 482                         }
 483                 }
 484         }
 485
 486         msginfo = procmsg_msginfo_new();
 487
 488         if (flags.tmp_flags || flags.perm_flags)
 489                 msginfo->flags = flags;
 490         else
 491                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_NEW | MSG_UNREAD);
 492
 493         msginfo->inreplyto = NULL;
 494
 495         while ((hnum = get_one_field(buf, sizeof(buf), data, hentry))
 496                != -1) {
 497                 hp = buf + strlen(hentry[hnum].name);
 498                 while (*hp == ' ' || *hp == '\t') hp++;
 499
 500                 switch (hnum) {
 501                 case H_DATE:
 502                         if (msginfo->date) break;
 503                         msginfo->date_t =
 504                                 procheader_date_parse(NULL, hp, 0);
 505                         if (g_utf8_validate(hp, -1, NULL)) {
 506                                 msginfo->date = g_strdup(hp);
 507                         } else {
 508                                 gchar *utf = conv_codeset_strdup(
 509                                         hp,
 510                                         conv_get_locale_charset_str_no_utf8(),
 511                                         CS_INTERNAL);
 512                                 if (utf == NULL ||
 513                                     !g_utf8_validate(utf, -1, NULL)) {
 514                                         g_free(utf);
 515                                         utf = g_malloc(strlen(buf)*2+1);
 516                                         conv_localetodisp(utf,
 517                                                 strlen(hp)*2+1, hp);
 518                                 }
 519                                 msginfo->date = utf;
 520                         }
 521                         break;
 522                 case H_FROM:
 523                         if (msginfo->from) break;
 524                         msginfo->from = conv_unmime_header(hp, NULL);
 525                         msginfo->fromname = procheader_get_fromname(msginfo->from);
 526                         remove_return(msginfo->from);
 527                         remove_return(msginfo->fromname);
 528                         break;
 529                 case H_TO:
 530                         tmp = conv_unmime_header(hp, NULL);
 531                         remove_return(tmp);
 532                         if (msginfo->to) {
 533                                 p = msginfo->to;
 534                                 msginfo->to =
 535                                         g_strconcat(p, ", ", tmp, NULL);
 536                                 g_free(p);
 537                         } else
 538                                 msginfo->to = g_strdup(tmp);
 539                         g_free(tmp);
 540                         break;
 541                 case H_CC:
 542                         tmp = conv_unmime_header(hp, NULL);
 543                         remove_return(tmp);
 544                         if (msginfo->cc) {
 545                                 p = msginfo->cc;
 546                                 msginfo->cc =
 547                                         g_strconcat(p, ", ", tmp, NULL);
 548                                 g_free(p);
 549                         } else
 550                                 msginfo->cc = g_strdup(tmp);
 551                         g_free(tmp);
 552                         break;
 553                 case H_NEWSGROUPS:
 554                         if (msginfo->newsgroups) {
 555                                 p = msginfo->newsgroups;
 556                                 msginfo->newsgroups =
 557                                         g_strconcat(p, ",", hp, NULL);
 558                                 g_free(p);
 559                         } else
 560                                 msginfo->newsgroups = g_strdup(hp);
 561                         break;
 562                 case H_SUBJECT:
 563                         if (msginfo->subject) break;
 564                         msginfo->subject = conv_unmime_header(hp, NULL);
 565                         unfold_line(msginfo->subject);
 566                        break;
 567                 case H_MSG_ID:
 568                         if (msginfo->msgid) break;
 569
 570                         extract_parenthesis(hp, '<', '>');
 571                         remove_space(hp);
 572                         msginfo->msgid = g_strdup(hp);
 573                         break;
 574                 case H_REFERENCES:
 575                         msginfo->references =
 576                                 references_list_prepend(msginfo->references,
 577                                                         hp);
 578                         break;
 579                 case H_IN_REPLY_TO:
 580                         if (msginfo->inreplyto) break;
 581
 582                         eliminate_parenthesis(hp, '(', ')');
 583                         if ((p = strrchr(hp, '<')) != NULL &&
 584                             strchr(p + 1, '>') != NULL) {
 585                                 extract_parenthesis(p, '<', '>');
 586                                 remove_space(p);
 587                                 if (*p != '\0')
 588                                         msginfo->inreplyto = g_strdup(p);
 589                         }
 590                         break;
 591                 case H_CONTENT_TYPE:
 592                         if (!g_ascii_strncasecmp(hp, "multipart/", 10))
 593                                 MSG_SET_TMP_FLAGS(msginfo->flags, MSG_MULTIPART);
 594                         break;
 595 #ifdef ALLOW_HEADER_HINT
 596                 case H_SEEN:
 597                         /* mnews Seen header */
 598                         MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 599                         break;
 600 #endif
 601                 case H_FACE:
 602                         if (!msginfo->extradata)
 603                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 604                         if (msginfo->extradata->face) break;
 605                         msginfo->extradata->face = g_strdup(hp);
 606                         break;
 607                 case H_X_FACE:
 608                         if (!msginfo->extradata)
 609                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 610                         if (msginfo->extradata->xface) break;
 611                         msginfo->extradata->xface = g_strdup(hp);
 612                         break;
 613                 case H_DISPOSITION_NOTIFICATION_TO:
 614                         if (!msginfo->extradata)
 615                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 616                         if (msginfo->extradata->dispositionnotificationto) break;
 617                         msginfo->extradata->dispositionnotificationto = g_strdup(hp);
 618                         break;
 619                 case H_RETURN_RECEIPT_TO:
 620                         if (!msginfo->extradata)
 621                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 622                         if (msginfo->extradata->returnreceiptto) break;
 623                         msginfo->extradata->returnreceiptto = g_strdup(hp);
 624                         break;
 625 /* partial download infos */
 626                 case H_SC_PARTIALLY_RETRIEVED:
 627                         if (!msginfo->extradata)
 628                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 629                         if (msginfo->extradata->partial_recv) break;
 630                         msginfo->extradata->partial_recv = g_strdup(hp);
 631                         break;
 632                 case H_SC_ACCOUNT_SERVER:
 633                         if (!msginfo->extradata)
 634                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 635                         if (msginfo->extradata->account_server) break;
 636                         msginfo->extradata->account_server = g_strdup(hp);
 637                         break;
 638                 case H_SC_ACCOUNT_LOGIN:
 639                         if (!msginfo->extradata)
 640                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 641                         if (msginfo->extradata->account_login) break;
 642                         msginfo->extradata->account_login = g_strdup(hp);
 643                         break;
 644                 case H_SC_MESSAGE_SIZE:
 645                         if (msginfo->total_size) break;
 646                         msginfo->total_size = atoi(hp);
 647                         break;
 648                 case H_SC_PLANNED_DOWNLOAD:
 649                         msginfo->planned_download = atoi(hp);
 650                         break;
 651 /* end partial download infos */
 652 #ifdef ALLOW_HEADER_HINT
 653                 case H_STATUS:
 654                         if (strchr(hp, 'R') != NULL)
 655                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 656                         if (strchr(hp, 'O') != NULL)
 657                                 MSG_UNSET_PERM_FLAGS(msginfo->flags, MSG_NEW);
 658                         if (strchr(hp, 'U') != NULL)
 659                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_UNREAD);
 660                         break;
 661                 case H_X_STATUS:
 662                         if (strchr(hp, 'D') != NULL)
 663                                 MSG_SET_PERM_FLAGS(msginfo->flags,
 664                                               MSG_REALLY_DELETED);
 665                         if (strchr(hp, 'F') != NULL)
 666                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_MARKED);
 667                         if (strchr(hp, 'd') != NULL)
 668                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_DELETED);
 669                         if (strchr(hp, 'r') != NULL)
 670                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_REPLIED);
 671                         if (strchr(hp, 'f') != NULL)
 672                                 MSG_SET_PERM_FLAGS(msginfo->flags, MSG_FORWARDED);
 673                         break;
 674 #endif
 675                 case H_FROM_SPACE:
 676                         if (msginfo->fromspace) break;
 677                         msginfo->fromspace = g_strdup(hp);
 678                         remove_return(msginfo->fromspace);
 679                         break;
 680 /* list infos */
 681                 case H_LIST_POST:
 682                         if (!msginfo->extradata)
 683                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 684                         if (msginfo->extradata->list_post) break;
 685                         msginfo->extradata->list_post = g_strdup(hp);
 686                         break;
 687                 case H_LIST_SUBSCRIBE:
 688                         if (!msginfo->extradata)
 689                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 690                         if (msginfo->extradata->list_subscribe) break;
 691                         msginfo->extradata->list_subscribe = g_strdup(hp);
 692                         break;
 693                 case H_LIST_UNSUBSCRIBE:
 694                         if (!msginfo->extradata)
 695                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 696                         if (msginfo->extradata->list_unsubscribe) break;
 697                         msginfo->extradata->list_unsubscribe = g_strdup(hp);
 698                         break;
 699                 case H_LIST_HELP:
 700                         if (!msginfo->extradata)
 701                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 702                         if (msginfo->extradata->list_help) break;
 703                         msginfo->extradata->list_help = g_strdup(hp);
 704                         break;
 705                 case H_LIST_ARCHIVE:
 706                         if (!msginfo->extradata)
 707                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 708                         if (msginfo->extradata->list_archive) break;
 709                         msginfo->extradata->list_archive = g_strdup(hp);
 710                         break;
 711                 case H_LIST_OWNER:
 712                         if (!msginfo->extradata)
 713                                 msginfo->extradata = g_new0(MsgInfoExtraData, 1);
 714                         if (msginfo->extradata->list_owner) break;
 715                         msginfo->extradata->list_owner = g_strdup(hp);
 716                         break;
 717 /* end list infos */
 718                 default:
 719                         break;
 720                 }
 721         }
 722
 723         if (!msginfo->inreplyto && msginfo->references)
 724                 msginfo->inreplyto =
 725                         g_strdup((gchar *)msginfo->references->data);
 726
 727         return msginfo;
 728 }
 729
 730 gchar *procheader_get_fromname(const gchar *str)
 731 {
 732         gchar *tmp, *name;
 733
 734         Xstrdup_a(tmp, str, return NULL);
 735
 736         if (*tmp == '\"') {
 737                 extract_quote(tmp, '\"');
 738                 g_strstrip(tmp);
 739         } else if (strchr(tmp, '<')) {
 740                 eliminate_parenthesis(tmp, '<', '>');
 741                 g_strstrip(tmp);
 742                 if (*tmp == '\0') {
 743                         strcpy(tmp, str);
 744                         extract_parenthesis(tmp, '<', '>');
 745                         g_strstrip(tmp);
 746                 }
 747         } else if (strchr(tmp, '(')) {
 748                 extract_parenthesis(tmp, '(', ')');
 749                 g_strstrip(tmp);
 750         }
 751
 752         if (*tmp == '\0')
 753                 name = g_strdup(str);
 754         else
 755                 name = g_strdup(tmp);
 756
 757         return name;
 758 }
 759
 760 static gint procheader_scan_date_string(const gchar *str,
 761                                         gchar *weekday, gint *day,
 762                                         gchar *month, gint *year,
 763                                         gint *hh, gint *mm, gint *ss,
 764                                         gchar *zone)
 765 {
 766         gint result;
 767         gint month_n;
 768         gchar zone1[3];
 769         gchar zone2[3];
 770
 771         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d %5s",
 772                         weekday, day, month, year, hh, mm, ss, zone);
 773         if (result == 8) return 0;
 774
 775         /* RFC2822 */
 776         result = sscanf(str, "%3s,%d %9s %d %2d:%2d:%2d %5s",
 777                         weekday, day, month, year, hh, mm, ss, zone);
 778         if (result == 8) return 0;
 779
 780         result = sscanf(str, "%d %9s %d %2d:%2d:%2d %5s",
 781                         day, month, year, hh, mm, ss, zone);
 782         if (result == 7) return 0;
 783
 784         *zone = '\0';
 785         result = sscanf(str, "%10s %d %9s %d %2d:%2d:%2d",
 786                         weekday, day, month, year, hh, mm, ss);
 787         if (result == 7) return 0;
 788
 789         result = sscanf(str, "%d %9s %d %2d:%2d:%2d",
 790                         day, month, year, hh, mm, ss);
 791         if (result == 6) return 0;
 792
 793         *ss = 0;
 794         result = sscanf(str, "%10s %d %9s %d %2d:%2d %5s",
 795                         weekday, day, month, year, hh, mm, zone);
 796         if (result == 7) return 0;
 797
 798         result = sscanf(str, "%d %9s %d %2d:%2d %5s",
 799                         day, month, year, hh, mm, zone);
 800         if (result == 6) return 0;
 801
 802         *zone = '\0';
 803         result = sscanf(str, "%10s %d %9s %d %2d:%2d",
 804                         weekday, day, month, year, hh, mm);
 805         if (result == 6) return 0;
 806
 807         result = sscanf(str, "%d %9s %d %2d:%2d",
 808                         day, month, year, hh, mm);
 809         if (result == 5) return 0;
 810
 811         /* RFC3339 subset */
 812         *weekday = '\0';
 813         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d+%2s:%2s",
 814                         year, &month_n, day, hh, mm, ss, zone1, zone2);
 815         if (result == 8) {
 816                 if (1 <= month_n && month_n <= 12) {
 817                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 818                         *zone = '+';
 819                         strncpy2(zone+1, zone1, 3);
 820                         strncpy2(zone+3, zone2, 3);
 821                         return 0;
 822                 }
 823         }
 824
 825         /* RFC3339 subset */
 826         *zone = '\0';
 827         *weekday = '\0';
 828         result = sscanf(str, "%4d-%2d-%2d %2d:%2d:%2d",
 829                         year, &month_n, day, hh, mm, ss);
 830         if (result == 6) {
 831                 if (1 <= month_n && month_n <= 12) {
 832                         strncpy2(month, monthstr+((month_n-1)*3), 4);
 833                         return 0;
 834                 }
 835         }
 836
 837         return -1;
 838 }
 839
 840 /*
 841  * Hiro, most UNIXen support this function:
 842  * http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?getdate
 843  */
 844 gboolean procheader_date_parse_to_tm(const gchar *src, struct tm *t, char *zone)
 845 {
 846         gchar weekday[11];
 847         gint day;
 848         gchar month[10];
 849         gint year;
 850         gint hh, mm, ss;
 851         GDateMonth dmonth;
 852         gchar *p;
 853
 854         if (!t)
 855                 return FALSE;
 856
 857         memset(t, 0, sizeof *t);
 858
 859         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 860                                         &hh, &mm, &ss, zone) < 0) {
 861                 g_warning("Invalid date: %s\n", src);
 862                 return FALSE;
 863         }
 864
 865         /* Y2K compliant :) */
 866         if (year < 100) {
 867                 if (year < 70)
 868                         year += 2000;
 869                 else
 870                         year += 1900;
 871         }
 872
 873         month[3] = '\0';
 874         if ((p = strstr(monthstr, month)) != NULL)
 875                 dmonth = (gint)(p - monthstr) / 3 + 1;
 876         else {
 877                 g_warning("Invalid month: %s\n", month);
 878                 dmonth = G_DATE_BAD_MONTH;
 879         }
 880
 881         t->tm_sec = ss;
 882         t->tm_min = mm;
 883         t->tm_hour = hh;
 884         t->tm_mday = day;
 885         t->tm_mon = dmonth - 1;
 886         t->tm_year = year - 1900;
 887         t->tm_wday = 0;
 888         t->tm_yday = 0;
 889         t->tm_isdst = -1;
 890
 891         mktime(t);
 892
 893         return TRUE;
 894 }
 895
 896 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 897 {
 898         gchar weekday[11];
 899         gint day;
 900         gchar month[10];
 901         gint year;
 902         gint hh, mm, ss;
 903         gchar zone[6];
 904         GDateMonth dmonth = G_DATE_BAD_MONTH;
 905         struct tm t;
 906         gchar *p;
 907         time_t timer;
 908         time_t tz_offset;
 909
 910         if (procheader_scan_date_string(src, weekday, &day, month, &year,
 911                                         &hh, &mm, &ss, zone) < 0) {
 912                 if (dest && len > 0)
 913                         strncpy2(dest, src, len);
 914                 return 0;
 915         }
 916
 917         /* Y2K compliant :) */
 918         if (year < 1000) {
 919                 if (year < 50)
 920                         year += 2000;
 921                 else
 922                         year += 1900;
 923         }
 924
 925         month[3] = '\0';
 926         for (p = monthstr; *p != '\0'; p += 3) {
 927                 if (!g_ascii_strncasecmp(p, month, 3)) {
 928                         dmonth = (gint)(p - monthstr) / 3 + 1;
 929                         break;
 930                 }
 931         }
 932
 933         t.tm_sec = ss;
 934         t.tm_min = mm;
 935         t.tm_hour = hh;
 936         t.tm_mday = day;
 937         t.tm_mon = dmonth - 1;
 938         t.tm_year = year - 1900;
 939         t.tm_wday = 0;
 940         t.tm_yday = 0;
 941         t.tm_isdst = -1;
 942
 943         timer = mktime(&t);
 944         tz_offset = remote_tzoffset_sec(zone);
 945         if (tz_offset != -1)
 946                 timer += tzoffset_sec(&timer) - tz_offset;
 947
 948         if (dest)
 949                 procheader_date_get_localtime(dest, len, timer);
 950
 951         return timer;
 952 }
 953
 954 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 955 {
 956         struct tm *lt;
 957         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 958         gchar *str;
 959         const gchar *src_codeset, *dest_codeset;
 960         struct tm buf;
 961
 962         lt = localtime_r(&timer, &buf);
 963
 964         if (prefs_common.date_format)
 965                 fast_strftime(dest, len, prefs_common.date_format, lt);
 966         else
 967                 fast_strftime(dest, len, default_format, lt);
 968
 969         if (!g_utf8_validate(dest, -1, NULL)) {
 970                 src_codeset = conv_get_locale_charset_str_no_utf8();
 971                 dest_codeset = CS_UTF_8;
 972                 str = conv_codeset_strdup(dest, src_codeset, dest_codeset);
 973                 if (str) {
 974                         strncpy2(dest, str, len);
 975                         g_free(str);
 976                 }
 977         }
 978 }
 979
 980 /* Added by Mel Hadasht on 27 Aug 2001 */
 981 /* Get a header from msginfo */
 982 gint procheader_get_header_from_msginfo(MsgInfo *msginfo, gchar *buf, gint len, gchar *header)
 983 {
 984         gchar *file;
 985         FILE *fp;
 986         HeaderEntry hentry[]={ { NULL, NULL, TRUE  },
 987                                { NULL, NULL, FALSE } };
 988         gint val;
 989
 990         hentry[0].name = header;
 991
 992         g_return_val_if_fail(msginfo != NULL, -1);
 993         file = procmsg_get_message_file_path(msginfo);
 994         if ((fp = g_fopen(file, "rb")) == NULL) {
 995                FILE_OP_ERROR(file, "fopen");
 996                g_free(file);
 997                return -1;
 998         }
 999         val = procheader_get_one_field(buf,len, fp, hentry);
1000         if (fclose(fp) == EOF) {
1001                 FILE_OP_ERROR(file, "fclose");
1002                 g_unlink(file);
1003                 g_free(file);
1004                 return -1;
1005         }
1006
1007         g_free(file);
1008         if (val == -1)
1009                 return -1;
1010
1011         return 0;
1012 }