src/news.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2002 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 "defs.h"
  25
  26 #include <glib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <dirent.h>
  31 #include <unistd.h>
  32 #include <time.h>
  33
  34 #include "intl.h"
  35 #include "news.h"
  36 #include "nntp.h"
  37 #include "socket.h"
  38 #include "recv.h"
  39 #include "procmsg.h"
  40 #include "procheader.h"
  41 #include "folder.h"
  42 #include "session.h"
  43 #include "statusbar.h"
  44 #include "codeconv.h"
  45 #include "utils.h"
  46 #include "prefs_common.h"
  47 #include "prefs_account.h"
  48 #include "inputdialog.h"
  49 #include "alertpanel.h"
  50
  51 #define NNTP_PORT       119
  52
  53 static void news_folder_init             (Folder        *folder,
  54                                           const gchar   *name,
  55                                           const gchar   *path);
  56
  57 static Session *news_session_new         (const gchar   *server,
  58                                           gushort        port,
  59                                           const gchar   *userid,
  60                                           const gchar   *passwd);
  61
  62 static gint news_get_article_cmd         (NNTPSession   *session,
  63                                           const gchar   *cmd,
  64                                           gint           num,
  65                                           gchar         *filename);
  66 static gint news_get_article             (NNTPSession   *session,
  67                                           gint           num,
  68                                           gchar         *filename);
  69 static gint news_get_header              (NNTPSession   *session,
  70                                           gint           num,
  71                                           gchar         *filename);
  72
  73 static gint news_select_group            (NNTPSession   *session,
  74                                           const gchar   *group,
  75                                           gint          *num,
  76                                           gint          *first,
  77                                           gint          *last);
  78 static GSList *news_get_uncached_articles(NNTPSession   *session,
  79                                           FolderItem    *item,
  80                                           gint           cache_last,
  81                                           gint          *rfirst,
  82                                           gint          *rlast);
  83 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  84 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
  85                                           MsgInfo       *msginfo);
  86 static GSList *news_delete_old_articles  (GSList        *alist,
  87                                           FolderItem    *item,
  88                                           gint           first);
  89 static void news_delete_all_articles     (FolderItem    *item);
  90
  91 static gint news_remove_msg              (Folder        *folder,
  92                                           FolderItem    *item,
  93                                           gint           num);
  94
  95 Folder *news_folder_new(const gchar *name, const gchar *path)
  96 {
  97         Folder *folder;
  98
  99         folder = (Folder *)g_new0(NewsFolder, 1);
 100         news_folder_init(folder, name, path);
 101
 102         return folder;
 103 }
 104
 105 void news_folder_destroy(NewsFolder *folder)
 106 {
 107         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 108 }
 109
 110 static void news_folder_init(Folder *folder, const gchar *name,
 111                              const gchar *path)
 112 {
 113         folder_remote_folder_init(folder, name, path);
 114
 115         folder->type = F_NEWS;
 116
 117         folder->get_msg_list = news_get_article_list;
 118         folder->fetch_msg    = news_fetch_msg;
 119         folder->scan         = news_scan_group;
 120         folder->remove_msg   = news_remove_msg;
 121 }
 122
 123 static Session *news_session_new(const gchar *server, gushort port,
 124                                  const gchar *userid, const gchar *passwd)
 125 {
 126         gchar buf[NNTPBUFSIZE];
 127         NNTPSession *session;
 128         NNTPSockInfo *nntp_sock;
 129
 130         g_return_val_if_fail(server != NULL, NULL);
 131
 132         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 133
 134         if (userid && passwd)
 135                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd);
 136         else
 137                 nntp_sock = nntp_open(server, port, buf);
 138         if (nntp_sock == NULL)
 139                 return NULL;
 140
 141         session = g_new(NNTPSession, 1);
 142         SESSION(session)->type             = SESSION_NEWS;
 143         SESSION(session)->server           = g_strdup(server);
 144         session->nntp_sock                 = nntp_sock;
 145         SESSION(session)->sock             = nntp_sock->sock;
 146         SESSION(session)->connected        = TRUE;
 147         SESSION(session)->phase            = SESSION_READY;
 148         SESSION(session)->last_access_time = time(NULL);
 149         SESSION(session)->data             = NULL;
 150         session->group = NULL;
 151
 152         return SESSION(session);
 153 }
 154
 155 void news_session_destroy(NNTPSession *session)
 156 {
 157         nntp_close(session->nntp_sock);
 158         session->nntp_sock = NULL;
 159         SESSION(session)->sock = NULL;
 160
 161         g_free(session->group);
 162 }
 163
 164 static Session *news_session_new_for_folder(Folder *folder)
 165 {
 166         Session *session;
 167         PrefsAccount *ac;
 168         const gchar *userid = NULL;
 169         gchar *passwd = NULL;
 170
 171         g_return_val_if_fail(folder != NULL, NULL);
 172         g_return_val_if_fail(folder->account != NULL, NULL);
 173
 174         ac = folder->account;
 175         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 176                 userid = ac->userid;
 177                 if (ac->passwd && ac->passwd[0])
 178                         passwd = g_strdup(ac->passwd);
 179                 else
 180                         passwd = input_dialog_query_password(ac->nntp_server,
 181                                                              userid);
 182         }
 183
 184         session = news_session_new(ac->nntp_server,
 185                                    ac->set_nntpport ? ac->nntpport : NNTP_PORT,
 186                                    userid, passwd);
 187         g_free(passwd);
 188
 189         return session;
 190 }
 191
 192 NNTPSession *news_session_get(Folder *folder)
 193 {
 194         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 195
 196         g_return_val_if_fail(folder != NULL, NULL);
 197         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 198         g_return_val_if_fail(folder->account != NULL, NULL);
 199
 200         if (!rfolder->session) {
 201                 rfolder->session = news_session_new_for_folder(folder);
 202                 statusbar_pop_all();
 203                 return NNTP_SESSION(rfolder->session);
 204         }
 205
 206         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 207                 rfolder->session->last_access_time = time(NULL);
 208                 statusbar_pop_all();
 209                 return NNTP_SESSION(rfolder->session);
 210         }
 211
 212         if (nntp_mode(NNTP_SESSION(rfolder->session)->nntp_sock, FALSE)
 213             != NN_SUCCESS) {
 214                 log_warning(_("NNTP connection to %s:%d has been"
 215                               " disconnected. Reconnecting...\n"),
 216                             folder->account->nntp_server,
 217                             folder->account->set_nntpport ?
 218                             folder->account->nntpport : NNTP_PORT);
 219                 session_destroy(rfolder->session);
 220                 rfolder->session = news_session_new_for_folder(folder);
 221         }
 222
 223         if (rfolder->session)
 224                 rfolder->session->last_access_time = time(NULL);
 225         statusbar_pop_all();
 226         return NNTP_SESSION(rfolder->session);
 227 }
 228
 229 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 230                               gboolean use_cache)
 231 {
 232         GSList *alist;
 233         NNTPSession *session;
 234
 235         g_return_val_if_fail(folder != NULL, NULL);
 236         g_return_val_if_fail(item != NULL, NULL);
 237         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 238
 239         session = news_session_get(folder);
 240
 241         if (!session) {
 242                 alist = procmsg_read_cache(item, FALSE);
 243                 item->last_num = procmsg_get_last_num_in_cache(alist);
 244         } else if (use_cache) {
 245                 GSList *newlist;
 246                 gint cache_last;
 247                 gint first, last;
 248
 249                 alist = procmsg_read_cache(item, FALSE);
 250
 251                 cache_last = procmsg_get_last_num_in_cache(alist);
 252                 newlist = news_get_uncached_articles
 253                         (session, item, cache_last, &first, &last);
 254                 alist = news_delete_old_articles(alist, item, first);
 255
 256                 alist = g_slist_concat(alist, newlist);
 257                 item->last_num = last;
 258         } else {
 259                 gint last;
 260
 261                 alist = news_get_uncached_articles
 262                         (session, item, 0, NULL, &last);
 263                 news_delete_all_articles(item);
 264                 item->last_num = last;
 265         }
 266
 267         procmsg_set_flags(alist, item);
 268
 269         statusbar_pop_all();
 270
 271         return alist;
 272 }
 273
 274 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 275 {
 276         gchar *path, *filename;
 277         NNTPSession *session;
 278         gint ok;
 279
 280         g_return_val_if_fail(folder != NULL, NULL);
 281         g_return_val_if_fail(item != NULL, NULL);
 282
 283         path = folder_item_get_path(item);
 284         if (!is_dir_exist(path))
 285                 make_dir_hier(path);
 286         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 287         g_free(path);
 288
 289         if (is_file_exist(filename)) {
 290                 debug_print(_("article %d has been already cached.\n"), num);
 291                 return filename;
 292         }
 293
 294         session = news_session_get(folder);
 295         if (!session) {
 296                 g_free(filename);
 297                 return NULL;
 298         }
 299
 300         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 301         statusbar_pop_all();
 302         if (ok != NN_SUCCESS) {
 303                 g_warning(_("can't select group %s\n"), item->path);
 304                 g_free(filename);
 305                 return NULL;
 306         }
 307
 308         debug_print(_("getting article %d...\n"), num);
 309         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 310                               num, filename);
 311         statusbar_pop_all();
 312         if (ok < 0) {
 313                 g_warning(_("can't read article %d\n"), num);
 314                 g_free(filename);
 315                 return NULL;
 316         }
 317
 318         return filename;
 319 }
 320
 321 void news_scan_group(Folder *folder, FolderItem *item)
 322 {
 323         NNTPSession *session;
 324         gint num = 0, first = 0, last = 0;
 325         gint new = 0, unread = 0, total = 0;
 326         gint min = 0, max = 0;
 327         gchar *path;
 328         gint ok;
 329
 330         g_return_if_fail(folder != NULL);
 331         g_return_if_fail(item != NULL);
 332
 333         session = news_session_get(folder);
 334         if (!session) return;
 335
 336         ok = news_select_group(session, item->path, &num, &first, &last);
 337         if (ok != NN_SUCCESS) {
 338                 log_warning(_("can't set group: %s\n"), item->path);
 339                 return;
 340         }
 341
 342         if (num == 0) {
 343                 item->new = item->unread = item->total = item->last_num = 0;
 344                 return;
 345         }
 346
 347         path = folder_item_get_path(item);
 348         if (path && is_dir_exist(path)) {
 349                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 350                                      first);
 351         }
 352         g_free(path);
 353
 354         if (first < min) {
 355                 new = unread = total = num;
 356         } else if (max < first) {
 357                 new = unread = total = num;
 358         } else if (last > max) {
 359                 new += last - max;
 360                 unread += last - max;
 361                 if (new > num) new = num;
 362                 if (unread > num) unread = num;
 363         }
 364         item->new = new;
 365         item->unread = unread;
 366         item->total = num;
 367         item->last_num = last;
 368 }
 369
 370 static NewsGroupInfo *news_group_info_new(const gchar *name,
 371                                           gint first, gint last, gchar type)
 372 {
 373         NewsGroupInfo *ginfo;
 374
 375         ginfo = g_new(NewsGroupInfo, 1);
 376         ginfo->name = g_strdup(name);
 377         ginfo->first = first;
 378         ginfo->last = last;
 379         ginfo->type = type;
 380
 381         return ginfo;
 382 }
 383
 384 static void news_group_info_free(NewsGroupInfo *ginfo)
 385 {
 386         g_free(ginfo->name);
 387         g_free(ginfo);
 388 }
 389
 390 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 391                                     NewsGroupInfo *ginfo2)
 392 {
 393         return g_strcasecmp(ginfo1->name, ginfo2->name);
 394 }
 395
 396 GSList *news_get_group_list(Folder *folder)
 397 {
 398         gchar *path, *filename;
 399         FILE *fp;
 400         GSList *list = NULL;
 401         GSList *last = NULL;
 402         gchar buf[NNTPBUFSIZE];
 403
 404         g_return_val_if_fail(folder != NULL, NULL);
 405         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 406
 407         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 408         if (!is_dir_exist(path))
 409                 make_dir_hier(path);
 410         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 411         g_free(path);
 412
 413         if ((fp = fopen(filename, "r")) == NULL) {
 414                 NNTPSession *session;
 415
 416                 session = news_session_get(folder);
 417                 if (!session) {
 418                         g_free(filename);
 419                         return NULL;
 420                 }
 421
 422                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 423                         g_free(filename);
 424                         statusbar_pop_all();
 425                         return NULL;
 426                 }
 427                 statusbar_pop_all();
 428                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 429                         log_warning(_("can't retrieve newsgroup list\n"));
 430                         session_destroy(SESSION(session));
 431                         REMOTE_FOLDER(folder)->session = NULL;
 432                         g_free(filename);
 433                         return NULL;
 434                 }
 435
 436                 if ((fp = fopen(filename, "r")) == NULL) {
 437                         FILE_OP_ERROR(filename, "fopen");
 438                         g_free(filename);
 439                         return NULL;
 440                 }
 441         }
 442
 443         while (fgets(buf, sizeof(buf), fp) != NULL) {
 444                 gchar *p = buf;
 445                 gchar *name;
 446                 gint last_num;
 447                 gint first_num;
 448                 gchar type;
 449                 NewsGroupInfo *ginfo;
 450
 451                 p = strchr(p, ' ');
 452                 if (!p) continue;
 453                 *p = '\0';
 454                 p++;
 455                 name = buf;
 456
 457                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 458                         continue;
 459
 460                 ginfo = news_group_info_new(name, first_num, last_num, type);
 461
 462                 if (!last)
 463                         last = list = g_slist_append(NULL, ginfo);
 464                 else {
 465                         last = g_slist_append(last, ginfo);
 466                         last = last->next;
 467                 }
 468         }
 469
 470         fclose(fp);
 471         g_free(filename);
 472
 473         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 474
 475         statusbar_pop_all();
 476
 477         return list;
 478 }
 479
 480 void news_group_list_free(GSList *group_list)
 481 {
 482         GSList *cur;
 483
 484         if (!group_list) return;
 485
 486         for (cur = group_list; cur != NULL; cur = cur->next)
 487                 news_group_info_free((NewsGroupInfo *)cur->data);
 488         g_slist_free(group_list);
 489 }
 490
 491 void news_remove_group_list_cache(Folder *folder)
 492 {
 493         gchar *path, *filename;
 494
 495         g_return_if_fail(folder != NULL);
 496         g_return_if_fail(folder->type == F_NEWS);
 497
 498         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 499         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 500         g_free(path);
 501
 502         if (is_file_exist(filename)) {
 503                 if (remove(filename) < 0)
 504                         FILE_OP_ERROR(filename, "remove");
 505         }
 506         g_free(filename);
 507 }
 508
 509 gint news_post(Folder *folder, const gchar *file)
 510 {
 511         NNTPSession *session;
 512         FILE *fp;
 513         gint ok;
 514
 515         g_return_val_if_fail(folder != NULL, -1);
 516         g_return_val_if_fail(folder->type == F_NEWS, -1);
 517         g_return_val_if_fail(file != NULL, -1);
 518
 519         session = news_session_get(folder);
 520         if (!session) return -1;
 521
 522         if ((fp = fopen(file, "r")) == NULL) {
 523                 FILE_OP_ERROR(file, "fopen");
 524                 return -1;
 525         }
 526
 527         ok = nntp_post(session->nntp_sock, fp);
 528         if (ok != NN_SUCCESS) {
 529                 log_warning(_("can't post article.\n"));
 530                 return -1;
 531         }
 532
 533         fclose(fp);
 534
 535         statusbar_pop_all();
 536
 537         return 0;
 538 }
 539
 540 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 541                                  gint num, gchar *filename)
 542 {
 543         gchar *msgid;
 544
 545         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 546             != NN_SUCCESS)
 547                 return -1;
 548
 549         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 550         g_free(msgid);
 551
 552         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 553                 log_warning(_("can't retrieve article %d\n"), num);
 554                 return -1;
 555         }
 556
 557         return 0;
 558 }
 559
 560 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 561 {
 562         return 0;
 563 }
 564
 565 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 566 {
 567         return news_get_article_cmd(session, "ARTICLE", num, filename);
 568 }
 569
 570 static gint news_get_header(NNTPSession *session, gint num, gchar *filename)
 571 {
 572         return news_get_article_cmd(session, "HEAD", num, filename);
 573 }
 574
 575 /**
 576  * news_select_group:
 577  * @session: Active NNTP session.
 578  * @group: Newsgroup name.
 579  * @num: Estimated number of articles.
 580  * @first: First article number.
 581  * @last: Last article number.
 582  *
 583  * Select newsgroup @group with the GROUP command if it is not already
 584  * selected in @session, or article numbers need to be returned.
 585  *
 586  * Return value: NNTP result code.
 587  **/
 588 static gint news_select_group(NNTPSession *session, const gchar *group,
 589                               gint *num, gint *first, gint *last)
 590 {
 591         gint ok;
 592         gint num_, first_, last_;
 593
 594         if (!num || !first || !last) {
 595                 if (session->group && g_strcasecmp(session->group, group) == 0)
 596                         return NN_SUCCESS;
 597                 num = &num_;
 598                 first = &first_;
 599                 last = &last_;
 600         }
 601
 602         g_free(session->group);
 603         session->group = NULL;
 604
 605         ok = nntp_group(session->nntp_sock, group, num, first, last);
 606         if (ok == NN_SUCCESS)
 607                 session->group = g_strdup(group);
 608
 609         return ok;
 610 }
 611
 612 static GSList *news_get_uncached_articles(NNTPSession *session,
 613                                           FolderItem *item, gint cache_last,
 614                                           gint *rfirst, gint *rlast)
 615 {
 616         gint ok;
 617         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 618         gchar buf[NNTPBUFSIZE];
 619         GSList *newlist = NULL;
 620         GSList *llast = NULL;
 621         MsgInfo *msginfo;
 622
 623         if (rfirst) *rfirst = 0;
 624         if (rlast)  *rlast  = 0;
 625
 626         g_return_val_if_fail(session != NULL, NULL);
 627         g_return_val_if_fail(item != NULL, NULL);
 628         g_return_val_if_fail(item->folder != NULL, NULL);
 629         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 630
 631         ok = news_select_group(session, item->path, &num, &first, &last);
 632         if (ok != NN_SUCCESS) {
 633                 log_warning(_("can't set group: %s\n"), item->path);
 634                 return NULL;
 635         }
 636
 637         /* calculate getting overview range */
 638         if (first > last) {
 639                 log_warning(_("invalid article range: %d - %d\n"),
 640                             first, last);
 641                 return NULL;
 642         }
 643         if (cache_last < first)
 644                 begin = first;
 645         else if (last < cache_last)
 646                 begin = first;
 647         else if (last == cache_last) {
 648                 debug_print(_("no new articles.\n"));
 649                 return NULL;
 650         } else
 651                 begin = cache_last + 1;
 652         end = last;
 653
 654         if (rfirst) *rfirst = first;
 655         if (rlast)  *rlast  = last;
 656
 657         if (prefs_common.max_articles > 0 &&
 658             end - begin + 1 > prefs_common.max_articles)
 659                 begin = end - prefs_common.max_articles + 1;
 660
 661         log_message(_("getting xover %d - %d in %s...\n"),
 662                     begin, end, item->path);
 663         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 664                 log_warning(_("can't get xover\n"));
 665                 return NULL;
 666         }
 667
 668         for (;;) {
 669                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 670                         log_warning(_("error occurred while getting xover.\n"));
 671                         return newlist;
 672                 }
 673
 674                 if (buf[0] == '.' && buf[1] == '\r') break;
 675
 676                 msginfo = news_parse_xover(buf);
 677                 if (!msginfo) {
 678                         log_warning(_("invalid xover line: %s\n"), buf);
 679                         continue;
 680                 }
 681
 682                 msginfo->folder = item;
 683                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 684                 msginfo->flags.tmp_flags = MSG_NEWS;
 685                 msginfo->newsgroups = g_strdup(item->path);
 686
 687                 if (!newlist)
 688                         llast = newlist = g_slist_append(newlist, msginfo);
 689                 else {
 690                         llast = g_slist_append(llast, msginfo);
 691                         llast = llast->next;
 692                 }
 693         }
 694
 695         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 696                 log_warning(_("can't get xhdr\n"));
 697                 return newlist;
 698         }
 699
 700         llast = newlist;
 701
 702         for (;;) {
 703                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 704                         log_warning(_("error occurred while getting xhdr.\n"));
 705                         return newlist;
 706                 }
 707
 708                 if (buf[0] == '.' && buf[1] == '\r') break;
 709                 if (!llast) {
 710                         g_warning("llast == NULL\n");
 711                         continue;
 712                 }
 713
 714                 msginfo = (MsgInfo *)llast->data;
 715                 msginfo->to = news_parse_xhdr(buf, msginfo);
 716
 717                 llast = llast->next;
 718         }
 719
 720         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 721                 log_warning(_("can't get xhdr\n"));
 722                 return newlist;
 723         }
 724
 725         llast = newlist;
 726
 727         for (;;) {
 728                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 729                         log_warning(_("error occurred while getting xhdr.\n"));
 730                         return newlist;
 731                 }
 732
 733                 if (buf[0] == '.' && buf[1] == '\r') break;
 734                 if (!llast) {
 735                         g_warning("llast == NULL\n");
 736                         continue;
 737                 }
 738
 739                 msginfo = (MsgInfo *)llast->data;
 740                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 741
 742                 llast = llast->next;
 743         }
 744
 745         return newlist;
 746 }
 747
 748 #define PARSE_ONE_PARAM(p, srcp) \
 749 { \
 750         p = strchr(srcp, '\t'); \
 751         if (!p) return NULL; \
 752         else \
 753                 *p++ = '\0'; \
 754 }
 755
 756 static MsgInfo *news_parse_xover(const gchar *xover_str)
 757 {
 758         MsgInfo *msginfo;
 759         gchar buf[NNTPBUFSIZE];
 760         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp;
 761         gchar *p;
 762         gint num, size_int, line_int;
 763         gchar *xover_buf;
 764
 765         Xstrdup_a(xover_buf, xover_str, return NULL);
 766
 767         PARSE_ONE_PARAM(subject, xover_buf);
 768         PARSE_ONE_PARAM(sender, subject);
 769         PARSE_ONE_PARAM(date, sender);
 770         PARSE_ONE_PARAM(msgid, date);
 771         PARSE_ONE_PARAM(ref, msgid);
 772         PARSE_ONE_PARAM(size, ref);
 773         PARSE_ONE_PARAM(line, size);
 774
 775         tmp = strchr(line, '\t');
 776         if (!tmp) tmp = strchr(line, '\r');
 777         if (!tmp) tmp = strchr(line, '\n');
 778         if (tmp) *tmp = '\0';
 779
 780         num = atoi(xover_str);
 781         size_int = atoi(size);
 782         line_int = atoi(line);
 783
 784         /* set MsgInfo */
 785         msginfo = g_new0(MsgInfo, 1);
 786         msginfo->msgnum = num;
 787         msginfo->size = size_int;
 788
 789         msginfo->date = g_strdup(date);
 790         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 791
 792         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 793         msginfo->from = g_strdup(buf);
 794         msginfo->fromname = procheader_get_fromname(buf);
 795
 796         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 797         msginfo->subject = g_strdup(buf);
 798
 799         extract_parenthesis(msgid, '<', '>');
 800         remove_space(msgid);
 801         if (*msgid != '\0')
 802                 msginfo->msgid = g_strdup(msgid);
 803
 804         msginfo->references = g_strdup(ref);
 805         eliminate_parenthesis(ref, '(', ')');
 806         if ((p = strrchr(ref, '<')) != NULL) {
 807                 extract_parenthesis(p, '<', '>');
 808                 remove_space(p);
 809                 if (*p != '\0')
 810                         msginfo->inreplyto = g_strdup(p);
 811         }
 812
 813         return msginfo;
 814 }
 815
 816 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 817 {
 818         gchar *p;
 819         gchar *tmp;
 820         gint num;
 821
 822         p = strchr(xhdr_str, ' ');
 823         if (!p)
 824                 return NULL;
 825         else
 826                 p++;
 827
 828         num = atoi(xhdr_str);
 829         if (msginfo->msgnum != num) return NULL;
 830
 831         tmp = strchr(p, '\r');
 832         if (!tmp) tmp = strchr(p, '\n');
 833
 834         if (tmp)
 835                 return g_strndup(p, tmp - p);
 836         else
 837                 return g_strdup(p);
 838 }
 839
 840 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 841                                         gint first)
 842 {
 843         GSList *cur, *next;
 844         MsgInfo *msginfo;
 845         gchar *dir;
 846
 847         g_return_val_if_fail(item != NULL, alist);
 848         g_return_val_if_fail(item->folder != NULL, alist);
 849         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 850
 851         if (first < 2) return alist;
 852
 853         debug_print(_("Deleting cached articles 1 - %d ... "), first - 1);
 854
 855         dir = folder_item_get_path(item);
 856         remove_numbered_files(dir, 1, first - 1);
 857         g_free(dir);
 858
 859         for (cur = alist; cur != NULL; ) {
 860                 next = cur->next;
 861
 862                 msginfo = (MsgInfo *)cur->data;
 863                 if (msginfo && msginfo->msgnum < first) {
 864                         procmsg_msginfo_free(msginfo);
 865                         alist = g_slist_remove(alist, msginfo);
 866                 }
 867
 868                 cur = next;
 869         }
 870
 871         return alist;
 872 }
 873
 874 static void news_delete_all_articles(FolderItem *item)
 875 {
 876         gchar *dir;
 877
 878         g_return_if_fail(item != NULL);
 879         g_return_if_fail(item->folder != NULL);
 880         g_return_if_fail(item->folder->type == F_NEWS);
 881
 882         debug_print(_("\tDeleting all cached articles... "));
 883
 884         dir = folder_item_get_path(item);
 885         remove_all_numbered_files(dir);
 886         g_free(dir);
 887
 888         debug_print(_("done.\n"));
 889 }