src/procheader.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999,2000 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(const gchar *file)
 189 {
 190         FILE *fp;
 191         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 192         gchar *p;
 193         GSList *hlist = NULL;
 194         Header *header;
 195
 196         if ((fp = fopen(file, "r")) == NULL) {
 197                 FILE_OP_ERROR(file, "fopen");
 198                 return NULL;
 199         }
 200
 201         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 202                 if (*buf == ':') continue;
 203                 for (p = buf; *p && *p != ' '; p++) {
 204                         if (*p == ':') {
 205                                 header = g_new(Header, 1);
 206                                 header->name = g_strndup(buf, p - buf);
 207                                 p++;
 208                                 while (*p == ' ' || *p == '\t') p++;
 209                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 210                                 header->body = g_strdup(tmp);
 211
 212                                 hlist = g_slist_append(hlist, header);
 213                                 break;
 214                         }
 215                 }
 216         }
 217
 218         fclose(fp);
 219         return hlist;
 220 }
 221
 222 void procheader_header_list_destroy(GSList *hlist)
 223 {
 224         Header *header;
 225
 226         while (hlist != NULL) {
 227                 header = hlist->data;
 228
 229                 g_free(header->name);
 230                 g_free(header->body);
 231                 g_free(header);
 232                 hlist = g_slist_remove(hlist, header);
 233         }
 234 }
 235
 236 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 237 {
 238         gchar buf[BUFFSIZE];
 239         HeaderEntry *hp;
 240         gint hnum;
 241         gchar *p;
 242
 243         if (hentry == NULL) return;
 244
 245         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 246                != -1) {
 247                 hp = hentry + hnum;
 248
 249                 p = buf + strlen(hp->name);
 250                 while (*p == ' ' || *p == '\t') p++;
 251
 252                 if (hp->body == NULL)
 253                         hp->body = g_strdup(p);
 254                 else if (!strcasecmp(hp->name, "To:") ||
 255                          !strcasecmp(hp->name, "Cc:")) {
 256                         gchar *tp = hp->body;
 257                         hp->body = g_strconcat(tp, ", ", p, NULL);
 258                         g_free(tp);
 259                 }
 260         }
 261 }
 262
 263 enum
 264 {
 265         H_DATE          = 0,
 266         H_FROM          = 1,
 267         H_TO            = 2,
 268         H_NEWSGROUPS    = 3,
 269         H_SUBJECT       = 4,
 270         H_MSG_ID        = 5,
 271         H_REFERENCES    = 6,
 272         H_IN_REPLY_TO   = 7,
 273         H_CONTENT_TYPE  = 8,
 274         H_SEEN          = 9,
 275         H_X_FACE        = 10,
 276 };
 277
 278 MsgInfo *procheader_parse(const gchar *file, MsgFlags flags, gboolean full)
 279 {
 280         static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 281                                            {"From:",            NULL, TRUE},
 282                                            {"To:",              NULL, TRUE},
 283                                            {"Newsgroups:",      NULL, TRUE},
 284                                            {"Subject:",         NULL, TRUE},
 285                                            {"Message-Id:",      NULL, FALSE},
 286                                            {"References:",      NULL, FALSE},
 287                                            {"In-Reply-To:",     NULL, FALSE},
 288                                            {"Content-Type:",    NULL, FALSE},
 289                                            {"Seen:",            NULL, FALSE},
 290                                            {"X-Face:",          NULL, FALSE},
 291                                            {NULL,               NULL, FALSE}};
 292
 293         static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 294                                             {"From:",           NULL, TRUE},
 295                                             {"To:",             NULL, TRUE},
 296                                             {"Newsgroups:",     NULL, TRUE},
 297                                             {"Subject:",        NULL, TRUE},
 298                                             {"Message-Id:",     NULL, FALSE},
 299                                             {"References:",     NULL, FALSE},
 300                                             {"In-Reply-To:",    NULL, FALSE},
 301                                             {"Content-Type:",   NULL, FALSE},
 302                                             {"Seen:",           NULL, FALSE},
 303                                             {NULL,              NULL, FALSE}};
 304
 305         FILE *fp;
 306         MsgInfo *msginfo;
 307         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 308         gchar *reference = NULL;
 309         gchar *p;
 310         gchar *hp;
 311         HeaderEntry *hentry;
 312         gint hnum;
 313
 314         hentry = full ? hentry_full : hentry_short;
 315
 316         if ((fp = fopen(file, "r")) == NULL) {
 317                 FILE_OP_ERROR(file, "fopen");
 318                 return NULL;
 319         }
 320         if (MSG_IS_QUEUED(flags)) {
 321                 while (fgets(buf, sizeof(buf), fp) != NULL)
 322                         if (buf[0] == '\r' || buf[0] == '\n') break;
 323         }
 324
 325         msginfo = g_new0(MsgInfo, 1);
 326         msginfo->flags = flags != 0 ? flags : MSG_NEW|MSG_UNREAD;
 327         msginfo->inreplyto = NULL;
 328
 329         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 330                != -1) {
 331                 hp = buf + strlen(hentry[hnum].name);
 332                 while (*hp == ' ' || *hp == '\t') hp++;
 333
 334                 switch (hnum) {
 335                 case H_DATE:
 336                         if (msginfo->date) break;
 337                         msginfo->date_t =
 338                                 procheader_date_parse(NULL, hp, 0);
 339                         msginfo->date = g_strdup(hp);
 340                         break;
 341                 case H_FROM:
 342                         if (msginfo->from) break;
 343                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 344                         msginfo->from = g_strdup(tmp);
 345                         msginfo->fromname = procheader_get_fromname(tmp);
 346                         break;
 347                 case H_TO:
 348                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 349                         if (msginfo->to) {
 350                                 p = msginfo->to;
 351                                 msginfo->to =
 352                                         g_strconcat(p, ", ", tmp, NULL);
 353                                 g_free(p);
 354                         } else
 355                                 msginfo->to = g_strdup(tmp);
 356                         break;
 357                 case H_NEWSGROUPS:
 358                         if (msginfo->newsgroups) {
 359                                 p = msginfo->newsgroups;
 360                                 msginfo->newsgroups =
 361                                         g_strconcat(p, ",", hp, NULL);
 362                                 g_free(p);
 363                         } else
 364                                 msginfo->newsgroups = g_strdup(buf + 12);
 365                         break;
 366                 case H_SUBJECT:
 367                         if (msginfo->subject) break;
 368                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 369                         msginfo->subject = g_strdup(tmp);
 370                         break;
 371                 case H_MSG_ID:
 372                         if (msginfo->msgid) break;
 373
 374                         extract_parenthesis(hp, '<', '>');
 375                         remove_space(hp);
 376                         msginfo->msgid = g_strdup(hp);
 377                         break;
 378                 case H_REFERENCES:
 379                         if (!reference) {
 380                                 eliminate_parenthesis(hp, '(', ')');
 381                                 if ((p = strrchr(hp, '<')) != NULL &&
 382                                     strchr(p + 1, '>') != NULL) {
 383                                         extract_parenthesis(p, '<', '>');
 384                                         remove_space(p);
 385                                         if (*p != '\0')
 386                                                 reference = g_strdup(p);
 387                                 }
 388                         }
 389                         break;
 390                 case H_IN_REPLY_TO:
 391                         if (!reference) {
 392                                 eliminate_parenthesis(hp, '(', ')');
 393                                 extract_parenthesis(hp, '<', '>');
 394                                 remove_space(hp);
 395                                 if (*hp != '\0')
 396                                         reference = g_strdup(hp);
 397                         }
 398                         break;
 399                 case H_CONTENT_TYPE:
 400                         if (!strncasecmp(hp, "multipart", 9))
 401                                 msginfo->flags |= MSG_MIME;
 402                         break;
 403                 case H_SEEN:
 404                         /* mnews Seen header */
 405                         MSG_UNSET_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 406                         break;
 407                 case H_X_FACE:
 408                         if (msginfo->xface) break;
 409                         msginfo->xface = g_strdup(hp);
 410                         break;
 411                 default:
 412                 }
 413         }
 414         msginfo->inreplyto = reference;
 415
 416         fclose(fp);
 417
 418         return msginfo;
 419 }
 420
 421 gchar *procheader_get_fromname(const gchar *str)
 422 {
 423         gchar *tmp, *name;
 424
 425         Xalloca(tmp, strlen(str) + 1, return NULL);
 426         strcpy(tmp, str);
 427
 428         if (*tmp == '\"') {
 429                 extract_quote(tmp, '\"');
 430                 g_strstrip(tmp);
 431         } else if (strchr(tmp, '<')) {
 432                 eliminate_parenthesis(tmp, '<', '>');
 433                 g_strstrip(tmp);
 434                 if (*tmp == '\0') {
 435                         strcpy(tmp, str);
 436                         extract_parenthesis(tmp, '<', '>');
 437                         g_strstrip(tmp);
 438                 }
 439         } else if (strchr(tmp, '(')) {
 440                 extract_parenthesis(tmp, '(', ')');
 441                 g_strstrip(tmp);
 442         }
 443
 444         if (*tmp == '\0')
 445                 name = g_strdup(str);
 446         else
 447                 name = g_strdup(tmp);
 448
 449         return name;
 450 }
 451
 452 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 453 {
 454         static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
 455         gchar weekday[4];
 456         gint day;
 457         gchar month[4];
 458         gint year;
 459         gint hh, mm, ss;
 460         gchar zone[6];
 461         gint result;
 462         GDateMonth dmonth;
 463         struct tm t;
 464         gchar *p;
 465         time_t timer;
 466
 467         /* parsing date field... */
 468         result = sscanf(src, "%3s, %d %3s %d %2d:%2d:%2d %5s",
 469                         weekday, &day, month, &year, &hh, &mm, &ss, zone);
 470         if (result != 8) {
 471                 result = sscanf(src, "%d %3s %d %2d:%2d:%2d %5s",
 472                                 &day, month, &year, &hh, &mm, &ss, zone);
 473                 if (result != 7) {
 474                         ss = 0;
 475                         result = sscanf(src, "%3s, %d %3s %d %2d:%2d %5s",
 476                                         weekday, &day, month, &year, &hh, &mm, zone);
 477                         if (result != 7) {
 478                                 result = sscanf(src, "%d %3s %d %2d:%2d %5s",
 479                                                 &day, month, &year, &hh, &mm,
 480                                                 zone);
 481                                 if (result != 6) {
 482                                         g_warning("Invalid date: %s\n", src);
 483                                         if (dest && len > 0)
 484                                                 strncpy2(dest, src, len);
 485                                         return 0;
 486                                 }
 487                         }
 488                 }
 489         }
 490
 491         /* Y2K compliant :) */
 492         if (year < 100) {
 493                 if (year < 70)
 494                         year += 2000;
 495                 else
 496                         year += 1900;
 497         }
 498
 499         if ((p = strstr(monthstr, month)) != NULL)
 500                 dmonth = (gint)(p - monthstr) / 3 + 1;
 501         else {
 502                 g_warning("Invalid month: %s\n", month);
 503                 dmonth = G_DATE_BAD_MONTH;
 504         }
 505
 506         t.tm_sec = ss;
 507         t.tm_min = mm;
 508         t.tm_hour = hh;
 509         t.tm_mday = day;
 510         t.tm_mon = dmonth - 1;
 511         t.tm_year = year - 1900;
 512         t.tm_wday = 0;
 513         t.tm_yday = 0;
 514         t.tm_isdst = -1;
 515
 516         timer = mktime(&t);
 517         timer += tzoffset_sec(&timer) - remote_tzoffset_sec(zone);
 518
 519         if (dest)
 520                 procheader_date_get_localtime(dest, len, timer);
 521
 522         return timer;
 523 }
 524
 525 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 526 {
 527         struct tm *lt;
 528         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 529
 530         lt = localtime(&timer);
 531
 532         if (prefs_common.date_format)
 533                 strftime(dest, len, prefs_common.date_format, lt);
 534         else
 535                 strftime(dest, len, default_format, lt);
 536 }