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 /*
  40   procheader_get_one_field
  41   - reads fp and puts the header and the corresponding content into buf
  42     if one of these is one of hentry table.
  43   - if hentry is NULL, ignores no headers
  44  */
  45
  46 gint procheader_get_one_field(gchar *buf, gint len, FILE *fp,
  47                               HeaderEntry hentry[])
  48 {
  49         gint nexthead;
  50         gint hnum = 0;
  51         HeaderEntry *hp = NULL;
  52
  53         if (hentry != NULL) {
  54                 /* skip non-required headers */
  55                 do {
  56                         do {
  57                                 if (fgets(buf, len, fp) == NULL)
  58                                         return -1;
  59                                 if (buf[0] == '\r' || buf[0] == '\n')
  60                                         return -1;
  61                         } while (buf[0] == ' ' || buf[0] == '\t');
  62
  63                         for (hp = hentry, hnum = 0; hp->name != NULL;
  64                              hp++, hnum++) {
  65                                 if (!strncasecmp(hp->name, buf,
  66                                                  strlen(hp->name)))
  67                                         break;
  68                         }
  69                 } while (hp->name == NULL);
  70         } else {
  71                 if (fgets(buf, len, fp) == NULL) return -1;
  72                 if (buf[0] == '\r' || buf[0] == '\n') return -1;
  73         }
  74
  75         /* unfold the specified folded line */
  76         if (hp && hp->unfold) {
  77                 gboolean folded = FALSE;
  78                 gchar *bufp = buf + strlen(buf);
  79
  80                 while (1) {
  81                         nexthead = fgetc(fp);
  82
  83                         /* folded */
  84                         if (nexthead == ' ' || nexthead == '\t')
  85                                 folded = TRUE;
  86                         else if (nexthead == EOF)
  87                                 break;
  88                         else if (folded == TRUE) {
  89                                 /* concatenate next line */
  90                                 if ((len - (bufp - buf)) <= 2) break;
  91
  92                                 /* replace return code on the tail end
  93                                    with space */
  94                                 *(bufp - 1) = ' ';
  95                                 *bufp++ = nexthead;
  96                                 *bufp = '\0';
  97                                 if (nexthead == '\r' || nexthead == '\n') {
  98                                         folded = FALSE;
  99                                         continue;
 100                                 }
 101                                 if (fgets(bufp, len - (bufp - buf), fp)
 102                                     == NULL) break;
 103                                 bufp += strlen(bufp);
 104
 105                                 folded = FALSE;
 106                         } else {
 107                                 ungetc(nexthead, fp);
 108                                 break;
 109                         }
 110                 }
 111
 112                 /* remove trailing return code */
 113                 strretchomp(buf);
 114
 115                 return hnum;
 116         }
 117
 118         while (1) {
 119                 nexthead = fgetc(fp);
 120                 if (nexthead == ' ' || nexthead == '\t') {
 121                         size_t buflen = strlen(buf);
 122
 123                         /* concatenate next line */
 124                         if ((len - buflen) > 2) {
 125                                 gchar *p = buf + buflen;
 126
 127                                 *p++ = nexthead;
 128                                 *p = '\0';
 129                                 buflen++;
 130                                 if (fgets(p, len - buflen, fp) == NULL)
 131                                         break;
 132                         } else
 133                                 break;
 134                 } else {
 135                         if (nexthead != EOF)
 136                                 ungetc(nexthead, fp);
 137                         break;
 138                 }
 139         }
 140
 141         /* remove trailing return code */
 142         strretchomp(buf);
 143
 144         return hnum;
 145 }
 146
 147 gchar *procheader_get_unfolded_line(gchar *buf, gint len, FILE *fp)
 148 {
 149         gboolean folded = FALSE;
 150         gint nexthead;
 151         gchar *bufp;
 152
 153         if (fgets(buf, len, fp) == NULL) return NULL;
 154         if (buf[0] == '\r' || buf[0] == '\n') return NULL;
 155         bufp = buf + strlen(buf);
 156
 157         while (1) {
 158                 nexthead = fgetc(fp);
 159
 160                 /* folded */
 161                 if (nexthead == ' ' || nexthead == '\t')
 162                         folded = TRUE;
 163                 else if (nexthead == EOF)
 164                         break;
 165                 else if (folded == TRUE) {
 166                         /* concatenate next line */
 167                         if ((len - (bufp - buf)) <= 2) break;
 168
 169                         /* replace return code on the tail end
 170                            with space */
 171                         *(bufp - 1) = ' ';
 172                         *bufp++ = nexthead;
 173                         *bufp = '\0';
 174                         if (nexthead == '\r' || nexthead == '\n') {
 175                                 folded = FALSE;
 176                                 continue;
 177                         }
 178                         if (fgets(bufp, len - (bufp - buf), fp)
 179                             == NULL) break;
 180                         bufp += strlen(bufp);
 181
 182                         folded = FALSE;
 183                 } else {
 184                         ungetc(nexthead, fp);
 185                         break;
 186                 }
 187         }
 188
 189         /* remove trailing return code */
 190         strretchomp(buf);
 191
 192         return buf;
 193 }
 194
 195 GSList *procheader_get_header_list(const gchar *file)
 196 {
 197         FILE *fp;
 198         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 199         gchar *p;
 200         GSList *hlist = NULL;
 201         Header *header;
 202
 203         if ((fp = fopen(file, "r")) == NULL) {
 204                 FILE_OP_ERROR(file, "fopen");
 205                 return NULL;
 206         }
 207
 208         while (procheader_get_unfolded_line(buf, sizeof(buf), fp) != NULL) {
 209                 if (*buf == ':') continue;
 210                 for (p = buf; *p && *p != ' '; p++) {
 211                         if (*p == ':') {
 212                                 header = g_new(Header, 1);
 213                                 header->name = g_strndup(buf, p - buf);
 214                                 p++;
 215                                 while (*p == ' ' || *p == '\t') p++;
 216                                 conv_unmime_header(tmp, sizeof(tmp), p, NULL);
 217                                 header->body = g_strdup(tmp);
 218
 219                                 hlist = g_slist_append(hlist, header);
 220                                 break;
 221                         }
 222                 }
 223         }
 224
 225         fclose(fp);
 226         return hlist;
 227 }
 228
 229 void procheader_header_list_destroy(GSList *hlist)
 230 {
 231         Header *header;
 232
 233         while (hlist != NULL) {
 234                 header = hlist->data;
 235
 236                 g_free(header->name);
 237                 g_free(header->body);
 238                 g_free(header);
 239                 hlist = g_slist_remove(hlist, header);
 240         }
 241 }
 242
 243 void procheader_get_header_fields(FILE *fp, HeaderEntry hentry[])
 244 {
 245         gchar buf[BUFFSIZE];
 246         HeaderEntry *hp;
 247         gint hnum;
 248         gchar *p;
 249
 250         if (hentry == NULL) return;
 251
 252         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 253                != -1) {
 254                 hp = hentry + hnum;
 255
 256                 p = buf + strlen(hp->name);
 257                 while (*p == ' ' || *p == '\t') p++;
 258
 259                 if (hp->body == NULL)
 260                         hp->body = g_strdup(p);
 261                 else if (!strcasecmp(hp->name, "To:") ||
 262                          !strcasecmp(hp->name, "Cc:")) {
 263                         gchar *tp = hp->body;
 264                         hp->body = g_strconcat(tp, ", ", p, NULL);
 265                         g_free(tp);
 266                 }
 267         }
 268 }
 269
 270 enum
 271 {
 272         H_DATE          = 0,
 273         H_FROM          = 1,
 274         H_TO            = 2,
 275         H_NEWSGROUPS    = 3,
 276         H_SUBJECT       = 4,
 277         H_MSG_ID        = 5,
 278         H_REFERENCES    = 6,
 279         H_IN_REPLY_TO   = 7,
 280         H_CONTENT_TYPE  = 8,
 281         H_SEEN          = 9,
 282         H_X_FACE        = 10,
 283 };
 284
 285 MsgInfo *procheader_parse(const gchar *file, MsgFlags flags, gboolean full)
 286 {
 287         static HeaderEntry hentry_full[] = {{"Date:",           NULL, FALSE},
 288                                            {"From:",            NULL, TRUE},
 289                                            {"To:",              NULL, TRUE},
 290                                            {"Newsgroups:",      NULL, TRUE},
 291                                            {"Subject:",         NULL, TRUE},
 292                                            {"Message-Id:",      NULL, FALSE},
 293                                            {"References:",      NULL, FALSE},
 294                                            {"In-Reply-To:",     NULL, FALSE},
 295                                            {"Content-Type:",    NULL, FALSE},
 296                                            {"Seen:",            NULL, FALSE},
 297                                            {"X-Face:",          NULL, FALSE},
 298                                            {NULL,               NULL, FALSE}};
 299
 300         static HeaderEntry hentry_short[] = {{"Date:",          NULL, FALSE},
 301                                             {"From:",           NULL, TRUE},
 302                                             {"To:",             NULL, TRUE},
 303                                             {"Newsgroups:",     NULL, TRUE},
 304                                             {"Subject:",        NULL, TRUE},
 305                                             {"Message-Id:",     NULL, FALSE},
 306                                             {"References:",     NULL, FALSE},
 307                                             {"In-Reply-To:",    NULL, FALSE},
 308                                             {"Content-Type:",   NULL, FALSE},
 309                                             {"Seen:",           NULL, FALSE},
 310                                             {NULL,              NULL, FALSE}};
 311
 312         FILE *fp;
 313         MsgInfo *msginfo;
 314         gchar buf[BUFFSIZE], tmp[BUFFSIZE];
 315         gchar *reference = NULL;
 316         gchar *p;
 317         gchar *hp;
 318         HeaderEntry *hentry;
 319         gint hnum;
 320
 321         hentry = full ? hentry_full : hentry_short;
 322
 323         if ((fp = fopen(file, "r")) == NULL) {
 324                 FILE_OP_ERROR(file, "fopen");
 325                 return NULL;
 326         }
 327         if (MSG_IS_QUEUED(flags)) {
 328                 while (fgets(buf, sizeof(buf), fp) != NULL)
 329                         if (buf[0] == '\r' || buf[0] == '\n') break;
 330         }
 331
 332         msginfo = g_new0(MsgInfo, 1);
 333         msginfo->flags = flags != 0 ? flags : MSG_NEW|MSG_UNREAD;
 334         msginfo->inreplyto = NULL;
 335
 336         while ((hnum = procheader_get_one_field(buf, sizeof(buf), fp, hentry))
 337                != -1) {
 338                 hp = buf + strlen(hentry[hnum].name);
 339                 while (*hp == ' ' || *hp == '\t') hp++;
 340
 341                 switch (hnum) {
 342                 case H_DATE:
 343                         if (msginfo->date) break;
 344                         msginfo->date_t =
 345                                 procheader_date_parse(NULL, hp, 0);
 346                         msginfo->date = g_strdup(hp);
 347                         break;
 348                 case H_FROM:
 349                         if (msginfo->from) break;
 350                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 351                         msginfo->from = g_strdup(tmp);
 352                         msginfo->fromname = procheader_get_fromname(tmp);
 353                         break;
 354                 case H_TO:
 355                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 356                         if (msginfo->to) {
 357                                 p = msginfo->to;
 358                                 msginfo->to =
 359                                         g_strconcat(p, ", ", tmp, NULL);
 360                                 g_free(p);
 361                         } else
 362                                 msginfo->to = g_strdup(tmp);
 363                         break;
 364                 case H_NEWSGROUPS:
 365                         if (msginfo->newsgroups) {
 366                                 p = msginfo->newsgroups;
 367                                 msginfo->newsgroups =
 368                                         g_strconcat(p, ",", hp, NULL);
 369                                 g_free(p);
 370                         } else
 371                                 msginfo->newsgroups = g_strdup(buf + 12);
 372                         break;
 373                 case H_SUBJECT:
 374                         if (msginfo->subject) break;
 375                         conv_unmime_header(tmp, sizeof(tmp), hp, NULL);
 376                         msginfo->subject = g_strdup(tmp);
 377                         break;
 378                 case H_MSG_ID:
 379                         if (msginfo->msgid) break;
 380
 381                         extract_parenthesis(hp, '<', '>');
 382                         remove_space(hp);
 383                         msginfo->msgid = g_strdup(hp);
 384                         break;
 385                 case H_REFERENCES:
 386                         if (!reference) {
 387                                 eliminate_parenthesis(hp, '(', ')');
 388                                 if ((p = strrchr(hp, '<')) != NULL &&
 389                                     strchr(p + 1, '>') != NULL) {
 390                                         extract_parenthesis(p, '<', '>');
 391                                         remove_space(p);
 392                                         if (*p != '\0')
 393                                                 reference = g_strdup(p);
 394                                 }
 395                         }
 396                         break;
 397                 case H_IN_REPLY_TO:
 398                         if (!reference) {
 399                                 eliminate_parenthesis(hp, '(', ')');
 400                                 extract_parenthesis(hp, '<', '>');
 401                                 remove_space(hp);
 402                                 if (*hp != '\0')
 403                                         reference = g_strdup(hp);
 404                         }
 405                         break;
 406                 case H_CONTENT_TYPE:
 407                         if (!strncasecmp(hp, "multipart", 9))
 408                                 msginfo->flags |= MSG_MIME;
 409                         break;
 410                 case H_SEEN:
 411                         /* mnews Seen header */
 412                         MSG_UNSET_FLAGS(msginfo->flags, MSG_NEW|MSG_UNREAD);
 413                         break;
 414                 case H_X_FACE:
 415                         if (msginfo->xface) break;
 416                         msginfo->xface = g_strdup(hp);
 417                         break;
 418                 default:
 419                 }
 420         }
 421         msginfo->inreplyto = reference;
 422
 423         fclose(fp);
 424
 425         return msginfo;
 426 }
 427
 428 gchar *procheader_get_fromname(const gchar *str)
 429 {
 430         gchar *tmp, *name;
 431
 432         Xalloca(tmp, strlen(str) + 1, return NULL);
 433         strcpy(tmp, str);
 434
 435         if (*tmp == '\"') {
 436                 extract_quote(tmp, '\"');
 437                 g_strstrip(tmp);
 438         } else if (strchr(tmp, '<')) {
 439                 eliminate_parenthesis(tmp, '<', '>');
 440                 g_strstrip(tmp);
 441                 if (*tmp == '\0') {
 442                         strcpy(tmp, str);
 443                         extract_parenthesis(tmp, '<', '>');
 444                         g_strstrip(tmp);
 445                 }
 446         } else if (strchr(tmp, '(')) {
 447                 extract_parenthesis(tmp, '(', ')');
 448                 g_strstrip(tmp);
 449         }
 450
 451         if (*tmp == '\0')
 452                 name = g_strdup(str);
 453         else
 454                 name = g_strdup(tmp);
 455
 456         return name;
 457 }
 458
 459 time_t procheader_date_parse(gchar *dest, const gchar *src, gint len)
 460 {
 461         static gchar monthstr[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
 462         gchar weekday[4];
 463         gint day;
 464         gchar month[4];
 465         gint year;
 466         gint hh, mm, ss;
 467         gchar zone[6];
 468         gint result;
 469         GDateMonth dmonth;
 470         struct tm t;
 471         gchar *p;
 472         time_t timer;
 473
 474         /* parsing date field... */
 475         result = sscanf(src, "%3s, %d %3s %d %2d:%2d:%2d %5s",
 476                         weekday, &day, month, &year, &hh, &mm, &ss, zone);
 477         if (result != 8) {
 478                 result = sscanf(src, "%d %3s %d %2d:%2d:%2d %5s",
 479                                 &day, month, &year, &hh, &mm, &ss, zone);
 480                 if (result != 7) {
 481                         ss = 0;
 482                         result = sscanf(src, "%3s, %d %3s %d %2d:%2d %5s",
 483                                         weekday, &day, month, &year, &hh, &mm, zone);
 484                         if (result != 7) {
 485                                 result = sscanf(src, "%d %3s %d %2d:%2d %5s",
 486                                                 &day, month, &year, &hh, &mm,
 487                                                 zone);
 488                                 if (result != 6) {
 489                                         g_warning("Invalid date: %s\n", src);
 490                                         if (dest && len > 0)
 491                                                 strncpy2(dest, src, len);
 492                                         return 0;
 493                                 }
 494                         }
 495                 }
 496         }
 497
 498         /* Y2K compliant :) */
 499         if (year < 100) {
 500                 if (year < 70)
 501                         year += 2000;
 502                 else
 503                         year += 1900;
 504         }
 505
 506         if ((p = strstr(monthstr, month)) != NULL)
 507                 dmonth = (gint)(p - monthstr) / 3 + 1;
 508         else {
 509                 g_warning("Invalid month: %s\n", month);
 510                 dmonth = G_DATE_BAD_MONTH;
 511         }
 512
 513         t.tm_sec = ss;
 514         t.tm_min = mm;
 515         t.tm_hour = hh;
 516         t.tm_mday = day;
 517         t.tm_mon = dmonth - 1;
 518         t.tm_year = year - 1900;
 519         t.tm_wday = 0;
 520         t.tm_yday = 0;
 521         t.tm_isdst = -1;
 522
 523         timer = mktime(&t);
 524         timer += tzoffset_sec(&timer) - remote_tzoffset_sec(zone);
 525
 526         if (dest)
 527                 procheader_date_get_localtime(dest, len, timer);
 528
 529         return timer;
 530 }
 531
 532 void procheader_date_get_localtime(gchar *dest, gint len, const time_t timer)
 533 {
 534         struct tm *lt;
 535         gchar *default_format = "%y/%m/%d(%a) %H:%M";
 536
 537         lt = localtime(&timer);
 538
 539         if (prefs_common.date_format)
 540                 strftime(dest, len, prefs_common.date_format, lt);
 541         else
 542                 strftime(dest, len, default_format, lt);
 543 }