src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2001 Hiroyuki Yamamoto
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include <glib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #include <time.h>
  29
  30 #include "intl.h"
  31 #include "procheader.h"
  32 #include "procmsg.h"
  33 #include "codeconv.h"
  34 #include "prefs_common.h"
  35 #include "utils.h"
  36
  37 #define BUFFSIZE        8192
  38
  39 gint procheader_get_one_field(gchar *buf, gint len, FILE *fp,
  40                               HeaderEntry hentry[])
  41 {
  42         gint nexthead;
  43         gint hnum = 0;
  44         HeaderEntry *hp = NULL;
  45
  46         if (hentry != NULL) {
  47                 /* skip non-required headers */
  48                 do {
  49                         do {
  50                                 if (fgets(buf, len, fp) == NULL)
  51                                         return -1;
  52                                 if (buf[0] == '\r' || buf[0] == '\n')
  53                                         return -1;
  54                         } while (buf[0] == ' ' || buf[0] == '\t');
  55
  56                         for (hp = hentry, hnum = 0; hp->name != NULL;
  57                              hp++, hnum++) {
  58                                 if (!strncasecmp(hp->name, buf,
  59                                                  strlen(hp->name)))
  60                                         break;
  61                         }
  62                 } while (hp->name == NULL);
  63         } else {
  64                 if (fgets(buf, len, fp) == NULL) return -1;
  65                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
  66         }
  67
  68         /* unfold the specified folded line */
  69         if (hp && hp->unfold) {
  70                 gboolean folded = FALSE;
  71                 gchar *bufp = buf + strlen(buf);
  72
  73                 while (1) {
  74                         nexthead = fgetc(fp);
  75
  76                         /* folded */
  77                         if (nexthead == ' ' || nexthead == '\t')
  78                                 folded = TRUE;
  79                         else if (nexthead == EOF)
  80                                 break;
  81                         else if (folded == TRUE) {
  82                                 /* concatenate next line */
  83                                 if ((len - (bufp - buf)) <= 2) break;
  84
  85                                 /* replace return code on the tail end
  86                                    with space */
  87                                 *(bufp - 1) = ' ';
  88                                 *bufp++ = nexthead;
  89                                 *bufp = '\0';
  90                                 if (nexthead == '\r' || nexthead == '\n') {
  91                                         folded = FALSE;
  92                                         continue;
  93                                 }
  94                                 if (fgets(bufp, len - (bufp - buf), fp)
  95                                     == NULL) break;
  96                                 bufp += strlen(bufp);
  97
  98                                 folded = FALSE;
  99                         } else {
 100                                 ungetc(nexthead, fp);
 101                                 break;
 102                         }
 103                 }
 104
 105                 /* remove trailing return code */
 106                 strretchomp(buf);
 107
 108                 return hnum;
 109         }
 110
 111         while (1) {
 112                 nexthead = fgetc(fp);
 113                 if (nexthead == ' ' || nexthead == '\t') {
 114                         size_t buflen = strlen(buf);
 115
 116                         /* concatenate next line */
 117                         if ((len - buflen) > 2) {
 118                                 gchar *p = buf + buflen;
 119
 120                                 *p++ = nexthead;
 121                                 *p = '\0';
 122                                 buflen++;
 123                                 if (fgets(p, len - buflen, fp) == NULL)
 124                                         break;
 125                         } else
 126                                 break;
 127                 } else {
 128                         if (nexthead != EOF)
 129                                 ungetc(nexthead, fp);
 130                         break;
 131                 }
 132         }
 133
 134         /* remove trailing return code */
 135         strretchomp(buf);
 136
 137         return hnum;
 138 }
 139
 140 gchar *procheader_get_unfolded_line(gchar *buf, gint len, FILE *fp)
 141 {
 142         gboolean folded = FALSE;
 143         gint nexthead;
 144         gchar *bufp;
 145
 146         if (fgets(buf, len, fp) == NULL) return NULL;
 147         if (buf[0] == '\r' || buf[0] == '\n') return NULL;
 148         bufp = buf + strlen(buf);
 149
 150         while (1) {
 151                 nexthead = fgetc(fp);
 152
 153                 /* folded */
 154                 if (nexthead == ' ' || nexthead == '\t')
 155                         folded = TRUE;
 156                 else if (nexthead == EOF)
 157                         break;
 158                 else if (folded == TRUE) {
 159                         /* concatenate next line */
 160                         if ((len - (bufp - buf)) <= 2) break;
 161
 162                         /* replace return code on the tail end
 163                            with space */
 164                         *(bufp - 1) = ' ';
 165                         *bufp++ = nexthead;
 166                         *bufp = '\0';
 167                         if (nexthead == '\r' || nexthead == '\n') {
 168                                 folded = FALSE;
 169                                 continue;
 170                         }
 171                         if (fgets(bufp, len - (bufp - buf), fp)
 172                             == NULL) break;
 173                         bufp += strlen(bufp);
 174
 175                         folded = FALSE;
 176                 } else {
 177                         ungetc(nexthead, fp);
 178                         break;
 179                 }
 180         }
 181
 182         /* remove trailing return code */
 183         strretchomp(buf);
 184
 185         return buf;
 186 }
 187
 188 GSList *procheader_get_header_list_from_file(const gchar *file)
 189 {
 190         FILE *fp;
 191         GSList *hlist;
 192
 193         if ((fp = fopen(file, "r")) == NULL) {
 194                 FILE_OP_ERROR(file, "fopen");
 195                 return NULL;
 196         }
 197
 198         hlist = procheader_get_header_list(fp);
 199
 200         fclose(fp);
 201         return hlist;
 202 }
 203
 204 GSList *procheader_get_header_list(FILE *fp)
 205 {
 206         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 207         gchar *p;
 208         GSList *hlist = NULL;
 209         Header *header;
 210
 211         g_return_val_if_fail(fp != NULL, NULL);
 212
 213         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 214                 if (*buf == ':') continue;
 215                 for (p = buf; *p && *p != ' '; p++) {
 216                         if (*p == ':') {
 217                                 header = g_new(Header, 1);
 218                                 header->name = g_strndup(buf, p - buf);
 219                                 p++;
 220                                 while (*p == ' ' || *p == '\t') p++;
 221                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 222                                 header->body = g_strdup(tmp);
 223
 224                                 hlist = g_slist_append(hlist, header);
 225                                 break;
 226                         }
 227                 }
 228         }
 229
 230         return hlist;
 231 }
 232
 233 GPtrArray *procheader_get_header_array(FILE *fp)
 234 {
 235         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 236         gchar *p;
 237         GPtrArray *headers;
 238         Header *header;
 239
 240         g_return_val_if_fail(fp != NULL, NULL);
 241
 242         headers = g_ptr_array_new();
 243
 244         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 245                 if (*buf == ':') continue;
 246                 for (p = buf; *p && *p != ' '; p++) {
 247                         if (*p == ':') {
 248                                 header = g_new(Header, 1);
 249                                 header->name = g_strndup(buf, p - buf);
 250                                 p++;
 251                                 while (*p == ' ' || *p == '\t') p++;
 252                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 253                                 header->body = g_strdup(tmp);
 254
 255                                 g_ptr_array_add(headers, header);
 256                                 break;
 257                         }
 258                 }
 259         }
 260
 261         return headers;
 262 }
 263
 264 GPtrArray *procheader_get_header_array_asis(FILE *fp)
 265 {
 266         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 267         gchar *p;
 268         GPtrArray *headers;
 269         Header *header;
 270
 271         g_return_val_if_fail(fp != NULL, NULL);
 272
 273         headers = g_ptr_array_new();
 274
 275         while (procheader_get_one_field(buf, sizeof(buf), fp, NULL) != -1) {
 276                 if (*buf == ':') continue;
 277                 for (p = buf; *p && *p != ' '; p++) {
 278                         if (*p == ':') {
 279                                 header = g_new(Header, 1);
 280                                 header->name = g_strndup(buf, p - buf);
 281                                 p++;
 282                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 283                                 header->body = g_strdup(tmp);
 284
 285                                 g_ptr_array_add(headers, header);
 286                                 break;
 287                         }
 288                 }
 289         }
 290
 291         return headers;
 292 }
 293
 294 void procheader_header_list_destroy(GSList *hlist)
 295 {
 296         Header *header;
 297
 298         while (hlist != NULL) {
 299                 header = hlist->data;
 300                 procheader_header_free(header);
 301                 hlist = g_slist_remove(hlist, header);
 302         }
 303 }
 304
 305 void procheader_header_array_destroy(GPtrArray *harray)
 306 {
 307         gint i;
 308         Header *header;
 309
 310         for (i = 0; i < harray->len; i++) {
 311                 header = g_ptr_array_index(harray, i);
 312                 procheader_header_free(header);
 313         }
 314
 315         g_ptr_array_free(harray, TRUE);
 316 }
 317
 318 void procheader_header_free(Header *header)
 319 {
 320         if (!header) return;
 321
 322         g_free(header->name);
 323         g_free(header->body);
 324         g_free(header);
 325 }
 326
 327 /*
 328   tests whether two headers' names are equal
 329   remove the trailing ':' or ' ' before comparing
 330 */
 331
 332 gboolean procheader_headername_equal(char * hdr1, char * hdr2)
 333 {
 334         int len1;
 335         int len2;
 336
 337         len1 = strlen(hdr1);
 338         len2 = strlen(hdr2);
 339         if ((hdr1[len1 - 1] == ':') || (hdr1[len1 - 1] == ' '))
 340                 len1--;
 341         if ((hdr2[len2 - 1] == ':') || (hdr2[len2 - 1] == ' '))
 342                 len2--;
 343         if (len1 != len2)
 344                 return 0;
 345         return (strncasecmp(hdr1, hdr2, len1) == 0);
 346 }
 347
 348 /*
 349   parse headers, for example :
 350   From: dinh@enseirb.fr becomes :
 351   header->name = "From:"
 352   header->body = "dinh@enseirb.fr"
 353  */
 354
 355 Header * procheader_parse_header(gchar * buf)
 356 {
 357         gchar tmp[BUFFSIZE];
 358         gchar *p = buf;
 359         Header * header;
 360
 361         if ((*buf == ':') || (*buf == ' '))
 362                 return NULL;
 363
 364         for (p = buf; *p ; p++) {
 365                 if ((*p == ':') || (*p == ' ')) {
 366                         header = g_new(Header, 1);
 367                         header->name = g_strndup(buf, p - buf + 1);
 368                         p++;
 369                         while (*p == ' ' || *p == '\t') p++;
 370                         conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 371                         header->body = g_strdup(tmp);
 372                         return header;
 373                 }
 374         }
 375         return NULL;
 376 }
 377
 378 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 379 {
 380         gchar buf[BUFFSIZE];
 381         HeaderEntry *hp;
 382         gint hnum;
 383         gchar *p;
 384
 385         if (hentry == NULL) return;
 386
 387         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 388                != -1) {
 389                 hp = hentry + hnum;
 390
 391                 p = buf + strlen(hp->name);
 392                 while (*p == ' ' || *p == '\t') p++;
 393
 394                 if (hp->body == NULL)
 395                         hp->body = g_strdup(p);
 396                 else if (!strcasecmp(hp->name, "To:") ||
 397                          !strcasecmp(hp->name, "Cc:")) {
 398                         gchar *tp = hp->body;
 399                         hp->body = g_strconcat(tp, ", ", p, NULL);
 400                         g_free(tp);
 401                 }
 402         }
 403 }
 404
 405 enum
 406 {
 407         H_DATE          = 0,
 408         H_FROM          = 1,
 409         H_TO            = 2,
 410         H_CC            = 3,
 411         H_NEWSGROUPS    = 4,
 412         H_SUBJECT       = 5,
 413         H_MSG_ID        = 6,
 414         H_REFERENCES    = 7,
 415         H_IN_REPLY_TO   = 8,
 416         H_CONTENT_TYPE  = 9,
 417         H_SEEN          = 10,
 418         H_X_FACE        = 11,
 419         H_DISPOSITION_NOTIFICATION_TO = 12
 420 };
 421
 422 MsgInfo *procheader_parse(const gchar *file, MsgFlags flags, gboolean full)
 423 {
 424         static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 425                                            {"From:",            NULL, TRUE},
 426                                            {"To:",              NULL, TRUE},
 427                                            {"Cc:",              NULL, TRUE},
 428                                            {"Newsgroups:",      NULL, TRUE},
 429                                            {"Subject:",         NULL, TRUE},
 430                                            {"Message-Id:",      NULL, FALSE},
 431                                            {"References:",      NULL, FALSE},
 432                                            {"In-Reply-To:",     NULL, FALSE},
 433                                            {"Content-Type:",    NULL, FALSE},
 434                                            {"Seen:",            NULL, FALSE},
 435                                            {"X-Face:",          NULL, FALSE},
 436                                            {"Disposition-Notification-To:",NULL, FALSE},
 437                                            {NULL,               NULL, FALSE}};
 438
 439         static HeaderEntry hentry_short[] = {{"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                                             {NULL,              NULL, FALSE}};
 451
 452         FILE *fp;
 453         MsgInfo *msginfo;
 454         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 455         gchar *reference = NULL;
 456         gchar *p;
 457         gchar *hp;
 458         HeaderEntry *hentry;
 459         gint hnum;
 460
 461         hentry = full ? hentry_full : hentry_short;
 462
 463         if ((fp = fopen(file, "r")) == NULL) {
 464                 FILE_OP_ERROR(file, "fopen");
 465                 return NULL;
 466         }
 467         if (MSG_IS_QUEUED(flags)) {
 468                 while (fgets(buf, sizeof(buf), fp) != NULL)
 469                         if (buf[0] == '\r' || buf[0] == '\n') break;
 470         }
 471
 472         msginfo = g_new0(MsgInfo, 1);
 473         msginfo->flags = flags != 0 ? flags : MSG_NEW|MSG_UNREAD;
 474         msginfo->inreplyto = NULL;
 475
 476         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 477                != -1) {
 478                 hp = buf + strlen(hentry[hnum].name);
 479                 while (*hp == ' ' || *hp == '\t') hp++;
 480
 481                 switch (hnum) {
 482                 case H_DATE:
 483                         if (msginfo->date) break;
 484                         msginfo->date_t =
 485                                 procheader_date_parse(NULL, hp, 0);
 486                         msginfo->date = g_strdup(hp);
 487                         break;
 488                 case H_FROM:
 489                         if (msginfo->from) break;
 490                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 491                         msginfo->from = g_strdup(tmp);
 492                         msginfo->fromname = procheader_get_fromname(tmp);
 493                         break;
 494                 case H_TO:
 495                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 496                         if (msginfo->to) {
 497                                 p = msginfo->to;
 498                                 msginfo->to =
 499                                         g_strconcat(p, ", ", tmp, NULL);
 500                                 g_free(p);
 501                         } else
 502                                 msginfo->to = g_strdup(tmp);
 503                         break;
 504                 case H_CC:
 505                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 506                         if (msginfo->cc) {
 507                                 p = msginfo->cc;
 508                                 msginfo->cc =
 509                                         g_strconcat(p, ", ", tmp, NULL);
 510                                 g_free(p);
 511                         } else
 512                                 msginfo->cc = g_strdup(tmp);
 513                         break;
 514                 case H_NEWSGROUPS:
 515                         if (msginfo->newsgroups) {
 516                                 p = msginfo->newsgroups;
 517                                 msginfo->newsgroups =
 518                                         g_strconcat(p, ",", hp, NULL);
 519                                 g_free(p);
 520                         } else
 521                                 msginfo->newsgroups = g_strdup(buf + 12);
 522                         break;
 523                 case H_SUBJECT:
 524                         if (msginfo->subject) break;
 525                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 526                         msginfo->subject = g_strdup(tmp);
 527                         break;
 528                 case H_MSG_ID:
 529                         if (msginfo->msgid) break;
 530
 531                         extract_parenthesis(hp, '<', '>');
 532                         remove_space(hp);
 533                         msginfo->msgid = g_strdup(hp);
 534                         break;
 535                 case H_REFERENCES:
 536                         if (!reference) {
 537                                 eliminate_parenthesis(hp, '(', ')');
 538                                 if ((p = strrchr(hp, '<')) != NULL &&
 539                                     strchr(p + 1, '>') != NULL) {
 540                                         extract_parenthesis(p, '<', '>');
 541                                         remove_space(p);
 542                                         if (*p != '\0')
 543                                                 reference = g_strdup(p);
 544                                 }
 545                         }
 546                         break;
 547                 case H_IN_REPLY_TO:
 548                         if (!reference) {
 549                                 eliminate_parenthesis(hp, '(', ')');
 550                                 extract_parenthesis(hp, '<', '>');
 551                                 remove_space(hp);
 552                                 if (*hp != '\0')
 553                                         reference = g_strdup(hp);
 554                         }
 555                         break;
 556                 case H_CONTENT_TYPE:
 557                         if (!strncasecmp(hp, "multipart", 9))
 558                                 msginfo->flags |= MSG_MIME;
 559                         break;
 560                 case H_SEEN:
 561                         /* mnews Seen header */
 562                         MSG_UNSET_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 563                         break;
 564                 case H_X_FACE:
 565                         if (msginfo->xface) break;
 566                         msginfo->xface = g_strdup(hp);
 567                         break;
 568                 case H_DISPOSITION_NOTIFICATION_TO:
 569                         if (msginfo->dispositionnotificationto) break;
 570                         msginfo->dispositionnotificationto = g_strdup(hp);
 571                         break;
 572                 default:
 573                 }
 574         }
 575         msginfo->inreplyto = reference;
 576
 577         fclose(fp);
 578
 579         return msginfo;
 580 }
 581
 582 gchar *procheader_get_fromname(const gchar *str)
 583 {
 584         gchar *tmp, *name;
 585
 586         Xalloca(tmp, strlen(str) + 1, return NULL);
 587         strcpy(tmp, str);
 588
 589         if (*tmp == '\"') {
 590                 extract_quote(tmp, '\"');
 591                 g_strstrip(tmp);
 592         } else if (strchr(tmp, '<')) {
 593                 eliminate_parenthesis(tmp, '<', '>');
 594                 g_strstrip(tmp);
 595                 if (*tmp == '\0') {
 596                         strcpy(tmp, str);
 597                         extract_parenthesis(tmp, '<', '>');
 598                         g_strstrip(tmp);
 599                 }
 600         } else if (strchr(tmp, '(')) {
 601                 extract_parenthesis(tmp, '(', ')');
 602                 g_strstrip(tmp);
 603         }
 604
 605         if (*tmp == '\0')
 606                 name = g_strdup(str);
 607         else
 608                 name = g_strdup(tmp);
 609
 610         return name;
 611 }
 612
 613 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 614 {
 615         static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
 616         gchar weekday[4];
 617         gint day;
 618         gchar month[4];
 619         gint year;
 620         gint hh, mm, ss;
 621         gchar zone[6];
 622         gint result;
 623         GDateMonth dmonth;
 624         struct tm t;
 625         gchar *p;
 626         time_t timer;
 627
 628         /* parsing date field... */
 629         result = sscanf(src, "%3s, %d %3s %d %2d:%2d:%2d %5s",
 630                         weekday, &day, month, &year, &hh, &mm, &ss, zone);
 631         if (result != 8) {
 632                 result = sscanf(src, "%d %3s %d %2d:%2d:%2d %5s",
 633                                 &day, month, &year, &hh, &mm, &ss, zone);
 634                 if (result != 7) {
 635                         ss = 0;
 636                         result = sscanf(src, "%3s, %d %3s %d %2d:%2d %5s",
 637                                         weekday, &day, month, &year, &hh, &mm, zone);
 638                         if (result != 7) {
 639                                 result = sscanf(src, "%d %3s %d %2d:%2d %5s",
 640                                                 &day, month, &year, &hh, &mm,
 641                                                 zone);
 642                                 if (result != 6) {
 643                                         g_warning("Invalid date: %s\n", src);
 644                                         if (dest && len > 0)
 645                                                 strncpy2(dest, src, len);
 646                                         return 0;
 647                                 }
 648                         }
 649                 }
 650         }
 651
 652         /* Y2K compliant :) */
 653         if (year < 100) {
 654                 if (year < 70)
 655                         year += 2000;
 656                 else
 657                         year += 1900;
 658         }
 659
 660         if ((p = strstr(monthstr, month)) != NULL)
 661                 dmonth = (gint)(p - monthstr) / 3 + 1;
 662         else {
 663                 g_warning("Invalid month: %s\n", month);
 664                 dmonth = G_DATE_BAD_MONTH;
 665         }
 666
 667         t.tm_sec = ss;
 668         t.tm_min = mm;
 669         t.tm_hour = hh;
 670         t.tm_mday = day;
 671         t.tm_mon = dmonth - 1;
 672         t.tm_year = year - 1900;
 673         t.tm_wday = 0;
 674         t.tm_yday = 0;
 675         t.tm_isdst = -1;
 676
 677         timer = mktime(&t);
 678         timer += tzoffset_sec(&timer) - remote_tzoffset_sec(zone);
 679
 680         if (dest)
 681                 procheader_date_get_localtime(dest, len, timer);
 682
 683         return timer;
 684 }
 685
 686 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 687 {
 688         struct tm *lt;
 689         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 690
 691         lt = localtime(&timer);
 692
 693         if (prefs_common.date_format)
 694                 strftime(dest, len, prefs_common.date_format, lt);
 695         else
 696                 strftime(dest, len, default_format, lt);
 697 }