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 #if USE_SSL
  51 #  include "ssl.h"
  52 #endif
  53
  54 #define NNTP_PORT       119
  55 #if USE_SSL
  56 #define NNTPS_PORT      563
  57 #endif
  58
  59 static void news_folder_init             (Folder        *folder,
  60                                           const gchar   *name,
  61                                           const gchar   *path);
  62
  63 #if USE_SSL
  64 static Session *news_session_new         (const gchar   *server,
  65                                           gushort        port,
  66                                           const gchar   *userid,
  67                                           const gchar   *passwd,
  68                                           SSLType        ssl_type);
  69 #else
  70 static Session *news_session_new         (const gchar   *server,
  71                                           gushort        port,
  72                                           const gchar   *userid,
  73                                           const gchar   *passwd);
  74 #endif
  75
  76 static gint news_get_article_cmd         (NNTPSession   *session,
  77                                           const gchar   *cmd,
  78                                           gint           num,
  79                                           gchar         *filename);
  80 static gint news_get_article             (NNTPSession   *session,
  81                                           gint           num,
  82                                           gchar         *filename);
  83
  84 static gint news_select_group            (NNTPSession   *session,
  85                                           const gchar   *group,
  86                                           gint          *num,
  87                                           gint          *first,
  88                                           gint          *last);
  89 static GSList *news_get_uncached_articles(NNTPSession   *session,
  90                                           FolderItem    *item,
  91                                           gint           cache_last,
  92                                           gint          *rfirst,
  93                                           gint          *rlast);
  94 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  95 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
  96                                           MsgInfo       *msginfo);
  97 static GSList *news_delete_old_articles  (GSList        *alist,
  98                                           FolderItem    *item,
  99                                           gint           first);
 100 static void news_delete_all_articles     (FolderItem    *item);
 101 static void news_delete_expired_caches   (GSList        *alist,
 102                                           FolderItem    *item);
 103
 104 static gint news_remove_msg              (Folder        *folder,
 105                                           FolderItem    *item,
 106                                           gint           num);
 107 GSList *news_get_num_list                (Folder        *folder,
 108                                           FolderItem    *item);
 109 MsgInfo *news_fetch_msginfo              (Folder        *folder,
 110                                           FolderItem    *item,
 111                                           gint           num);
 112 GSList *news_fetch_msginfos              (Folder        *folder,
 113                                           FolderItem    *item,
 114                                           GSList        *msgnum_list);
 115
 116 Folder *news_folder_new(const gchar *name, const gchar *path)
 117 {
 118         Folder *folder;
 119
 120         folder = (Folder *)g_new0(NewsFolder, 1);
 121         news_folder_init(folder, name, path);
 122
 123         return folder;
 124 }
 125
 126 void news_folder_destroy(NewsFolder *folder)
 127 {
 128         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 129 }
 130
 131 static void news_folder_init(Folder *folder, const gchar *name,
 132                              const gchar *path)
 133 {
 134         folder->type = F_NEWS;
 135
 136         folder_remote_folder_init(folder, name, path);
 137
 138 /*
 139         folder->get_msg_list = news_get_article_list;
 140 */
 141         folder->fetch_msg    = news_fetch_msg;
 142 /*
 143         folder->scan         = news_scan_group;
 144 */
 145         folder->remove_msg   = news_remove_msg;
 146         folder->get_num_list = news_get_num_list;
 147         folder->fetch_msginfo = news_fetch_msginfo;
 148         folder->fetch_msginfos = news_fetch_msginfos;
 149 }
 150
 151 #if USE_SSL
 152 static Session *news_session_new(const gchar *server, gushort port,
 153                                  const gchar *userid, const gchar *passwd,
 154                                  SSLType ssl_type)
 155 #else
 156 static Session *news_session_new(const gchar *server, gushort port,
 157                                  const gchar *userid, const gchar *passwd)
 158 #endif
 159 {
 160         gchar buf[NNTPBUFSIZE];
 161         NNTPSession *session;
 162         NNTPSockInfo *nntp_sock;
 163
 164         g_return_val_if_fail(server != NULL, NULL);
 165
 166         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 167
 168 #if USE_SSL
 169         if (userid && passwd)
 170                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd,
 171                                            ssl_type);
 172         else
 173                 nntp_sock = nntp_open(server, port, buf, ssl_type);
 174 #else
 175         if (userid && passwd)
 176                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd);
 177         else
 178                 nntp_sock = nntp_open(server, port, buf);
 179 #endif
 180
 181         if (nntp_sock == NULL)
 182                 return NULL;
 183
 184         session = g_new(NNTPSession, 1);
 185         SESSION(session)->type             = SESSION_NEWS;
 186         SESSION(session)->server           = g_strdup(server);
 187         session->nntp_sock                 = nntp_sock;
 188         SESSION(session)->sock             = nntp_sock->sock;
 189         SESSION(session)->connected        = TRUE;
 190         SESSION(session)->phase            = SESSION_READY;
 191         SESSION(session)->last_access_time = time(NULL);
 192         SESSION(session)->data             = NULL;
 193         session->group = NULL;
 194
 195         return SESSION(session);
 196 }
 197
 198 void news_session_destroy(NNTPSession *session)
 199 {
 200         nntp_close(session->nntp_sock);
 201         session->nntp_sock = NULL;
 202         SESSION(session)->sock = NULL;
 203
 204         g_free(session->group);
 205 }
 206
 207 static Session *news_session_new_for_folder(Folder *folder)
 208 {
 209         Session *session;
 210         PrefsAccount *ac;
 211         const gchar *userid = NULL;
 212         gchar *passwd = NULL;
 213         gushort port;
 214
 215         g_return_val_if_fail(folder != NULL, NULL);
 216         g_return_val_if_fail(folder->account != NULL, NULL);
 217
 218         ac = folder->account;
 219         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 220                 userid = ac->userid;
 221                 if (ac->passwd && ac->passwd[0])
 222                         passwd = g_strdup(ac->passwd);
 223                 else
 224                         passwd = input_dialog_query_password(ac->nntp_server,
 225                                                              userid);
 226         }
 227
 228 #if USE_SSL
 229         port = ac->set_nntpport ? ac->nntpport
 230                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 231         session = news_session_new(ac->nntp_server, port, userid, passwd,
 232                                    ac->ssl_nntp);
 233 #else
 234         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 235         session = news_session_new(ac->nntp_server, port, userid, passwd);
 236 #endif
 237
 238         g_free(passwd);
 239
 240         return session;
 241 }
 242
 243 NNTPSession *news_session_get(Folder *folder)
 244 {
 245         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 246
 247         g_return_val_if_fail(folder != NULL, NULL);
 248         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 249         g_return_val_if_fail(folder->account != NULL, NULL);
 250
 251         if (!rfolder->session) {
 252                 rfolder->session = news_session_new_for_folder(folder);
 253                 statusbar_pop_all();
 254                 return NNTP_SESSION(rfolder->session);
 255         }
 256
 257         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 258                 rfolder->session->last_access_time = time(NULL);
 259                 statusbar_pop_all();
 260                 return NNTP_SESSION(rfolder->session);
 261         }
 262
 263         if (nntp_mode(NNTP_SESSION(rfolder->session)->nntp_sock, FALSE)
 264             != NN_SUCCESS) {
 265                 log_warning(_("NNTP connection to %s:%d has been"
 266                               " disconnected. Reconnecting...\n"),
 267                             folder->account->nntp_server,
 268                             folder->account->set_nntpport ?
 269                             folder->account->nntpport : NNTP_PORT);
 270                 session_destroy(rfolder->session);
 271                 rfolder->session = news_session_new_for_folder(folder);
 272         }
 273
 274         if (rfolder->session)
 275                 rfolder->session->last_access_time = time(NULL);
 276         statusbar_pop_all();
 277         return NNTP_SESSION(rfolder->session);
 278 }
 279
 280 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 281                               gboolean use_cache)
 282 {
 283         GSList *alist;
 284         NNTPSession *session;
 285
 286         g_return_val_if_fail(folder != NULL, NULL);
 287         g_return_val_if_fail(item != NULL, NULL);
 288         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 289
 290         session = news_session_get(folder);
 291
 292         if (!session) {
 293                 alist = procmsg_read_cache(item, FALSE);
 294                 item->last_num = procmsg_get_last_num_in_msg_list(alist);
 295         } else if (use_cache) {
 296                 GSList *newlist;
 297                 gint cache_last;
 298                 gint first, last;
 299
 300                 alist = procmsg_read_cache(item, FALSE);
 301
 302                 cache_last = procmsg_get_last_num_in_msg_list(alist);
 303                 newlist = news_get_uncached_articles
 304                         (session, item, cache_last, &first, &last);
 305                 if (first == 0 && last == 0) {
 306                         news_delete_all_articles(item);
 307                         procmsg_msg_list_free(alist);
 308                         alist = NULL;
 309                 } else {
 310                         alist = news_delete_old_articles(alist, item, first);
 311                         news_delete_expired_caches(alist, item);
 312                 }
 313
 314                 alist = g_slist_concat(alist, newlist);
 315
 316                 item->last_num = last;
 317         } else {
 318                 gint last;
 319
 320                 alist = news_get_uncached_articles
 321                         (session, item, 0, NULL, &last);
 322                 news_delete_all_articles(item);
 323                 item->last_num = last;
 324         }
 325
 326         procmsg_set_flags(alist, item);
 327
 328         statusbar_pop_all();
 329
 330         return alist;
 331 }
 332
 333 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 334 {
 335         gchar *path, *filename;
 336         NNTPSession *session;
 337         gint ok;
 338
 339         g_return_val_if_fail(folder != NULL, NULL);
 340         g_return_val_if_fail(item != NULL, NULL);
 341
 342         path = folder_item_get_path(item);
 343         if (!is_dir_exist(path))
 344                 make_dir_hier(path);
 345         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 346         g_free(path);
 347
 348         if (is_file_exist(filename)) {
 349                 debug_print(_("article %d has been already cached.\n"), num);
 350                 return filename;
 351         }
 352
 353         session = news_session_get(folder);
 354         if (!session) {
 355                 g_free(filename);
 356                 return NULL;
 357         }
 358
 359         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 360         statusbar_pop_all();
 361         if (ok != NN_SUCCESS) {
 362                 g_warning(_("can't select group %s\n"), item->path);
 363                 g_free(filename);
 364                 return NULL;
 365         }
 366
 367         debug_print(_("getting article %d...\n"), num);
 368         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 369                               num, filename);
 370         statusbar_pop_all();
 371         if (ok < 0) {
 372                 g_warning(_("can't read article %d\n"), num);
 373                 g_free(filename);
 374                 return NULL;
 375         }
 376
 377         return filename;
 378 }
 379
 380 gint news_scan_group(Folder *folder, FolderItem *item)
 381 {
 382         NNTPSession *session;
 383         gint num = 0, first = 0, last = 0;
 384         gint ok;
 385
 386         g_return_val_if_fail(folder != NULL, -1);
 387         g_return_val_if_fail(item != NULL, -1);
 388
 389         session = news_session_get(folder);
 390         if (!session) return -1;
 391
 392         ok = news_select_group(session, item->path, &num, &first, &last);
 393         if (ok != NN_SUCCESS) {
 394                 log_warning(_("can't set group: %s\n"), item->path);
 395                 return -1;
 396         }
 397
 398         if (num == 0) {
 399                 item->new = item->unread = item->total = item->last_num = 0;
 400                 return 0;
 401         }
 402
 403 /*
 404         path = folder_item_get_path(item);
 405         if (path && is_dir_exist(path)) {
 406                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 407                                      first);
 408         }
 409         g_free(path);
 410
 411         if (max < first || last < min)
 412                 new = unread = total = num;
 413         else {
 414                 if (min < first)
 415                         min = first;
 416                 else if (first < min) {
 417                         num -= min - first;
 418                         first = min;
 419                 }
 420
 421                 if (last < max)
 422                         max = last;
 423                 else if (max < last) {
 424                         new += last - max;
 425                         unread += last - max;
 426                 }
 427
 428                 if (new > num) new = num;
 429                 if (unread > num) unread = num;
 430         }
 431
 432         item->new = new;
 433         item->unread = unread;
 434         item->total = num;
 435         item->last_num = last;
 436 */
 437         return 0;
 438 }
 439
 440 static NewsGroupInfo *news_group_info_new(const gchar *name,
 441                                           gint first, gint last, gchar type)
 442 {
 443         NewsGroupInfo *ginfo;
 444
 445         ginfo = g_new(NewsGroupInfo, 1);
 446         ginfo->name = g_strdup(name);
 447         ginfo->first = first;
 448         ginfo->last = last;
 449         ginfo->type = type;
 450
 451         return ginfo;
 452 }
 453
 454 static void news_group_info_free(NewsGroupInfo *ginfo)
 455 {
 456         g_free(ginfo->name);
 457         g_free(ginfo);
 458 }
 459
 460 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 461                                     NewsGroupInfo *ginfo2)
 462 {
 463         return g_strcasecmp(ginfo1->name, ginfo2->name);
 464 }
 465
 466 GSList *news_get_group_list(Folder *folder)
 467 {
 468         gchar *path, *filename;
 469         FILE *fp;
 470         GSList *list = NULL;
 471         GSList *last = NULL;
 472         gchar buf[NNTPBUFSIZE];
 473
 474         g_return_val_if_fail(folder != NULL, NULL);
 475         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 476
 477         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 478         if (!is_dir_exist(path))
 479                 make_dir_hier(path);
 480         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 481         g_free(path);
 482
 483         if ((fp = fopen(filename, "rb")) == NULL) {
 484                 NNTPSession *session;
 485
 486                 session = news_session_get(folder);
 487                 if (!session) {
 488                         g_free(filename);
 489                         return NULL;
 490                 }
 491
 492                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 493                         g_free(filename);
 494                         statusbar_pop_all();
 495                         return NULL;
 496                 }
 497                 statusbar_pop_all();
 498                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 499                         log_warning(_("can't retrieve newsgroup list\n"));
 500                         session_destroy(SESSION(session));
 501                         REMOTE_FOLDER(folder)->session = NULL;
 502                         g_free(filename);
 503                         return NULL;
 504                 }
 505
 506                 if ((fp = fopen(filename, "rb")) == NULL) {
 507                         FILE_OP_ERROR(filename, "fopen");
 508                         g_free(filename);
 509                         return NULL;
 510                 }
 511         }
 512
 513         while (fgets(buf, sizeof(buf), fp) != NULL) {
 514                 gchar *p = buf;
 515                 gchar *name;
 516                 gint last_num;
 517                 gint first_num;
 518                 gchar type;
 519                 NewsGroupInfo *ginfo;
 520
 521                 p = strchr(p, ' ');
 522                 if (!p) continue;
 523                 *p = '\0';
 524                 p++;
 525                 name = buf;
 526
 527                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 528                         continue;
 529
 530                 ginfo = news_group_info_new(name, first_num, last_num, type);
 531
 532                 if (!last)
 533                         last = list = g_slist_append(NULL, ginfo);
 534                 else {
 535                         last = g_slist_append(last, ginfo);
 536                         last = last->next;
 537                 }
 538         }
 539
 540         fclose(fp);
 541         g_free(filename);
 542
 543         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 544
 545         statusbar_pop_all();
 546
 547         return list;
 548 }
 549
 550 void news_group_list_free(GSList *group_list)
 551 {
 552         GSList *cur;
 553
 554         if (!group_list) return;
 555
 556         for (cur = group_list; cur != NULL; cur = cur->next)
 557                 news_group_info_free((NewsGroupInfo *)cur->data);
 558         g_slist_free(group_list);
 559 }
 560
 561 void news_remove_group_list_cache(Folder *folder)
 562 {
 563         gchar *path, *filename;
 564
 565         g_return_if_fail(folder != NULL);
 566         g_return_if_fail(folder->type == F_NEWS);
 567
 568         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 569         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 570         g_free(path);
 571
 572         if (is_file_exist(filename)) {
 573                 if (remove(filename) < 0)
 574                         FILE_OP_ERROR(filename, "remove");
 575         }
 576         g_free(filename);
 577 }
 578
 579 gint news_post(Folder *folder, const gchar *file)
 580 {
 581         NNTPSession *session;
 582         FILE *fp;
 583         gint ok;
 584
 585         g_return_val_if_fail(folder != NULL, -1);
 586         g_return_val_if_fail(folder->type == F_NEWS, -1);
 587         g_return_val_if_fail(file != NULL, -1);
 588
 589         session = news_session_get(folder);
 590         if (!session) return -1;
 591
 592         if ((fp = fopen(file, "rb")) == NULL) {
 593                 FILE_OP_ERROR(file, "fopen");
 594                 return -1;
 595         }
 596
 597         ok = nntp_post(session->nntp_sock, fp);
 598         if (ok != NN_SUCCESS) {
 599                 log_warning(_("can't post article.\n"));
 600                 return -1;
 601         }
 602
 603         fclose(fp);
 604
 605         statusbar_pop_all();
 606
 607         return 0;
 608 }
 609
 610 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 611                                  gint num, gchar *filename)
 612 {
 613         gchar *msgid;
 614
 615         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 616             != NN_SUCCESS)
 617                 return -1;
 618
 619         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 620         g_free(msgid);
 621
 622         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 623                 log_warning(_("can't retrieve article %d\n"), num);
 624                 return -1;
 625         }
 626
 627         return 0;
 628 }
 629
 630 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 631 {
 632         gchar * dir;
 633         gint r;
 634
 635         dir = folder_item_get_path(item);
 636         printf("removing %d in %s\n",num,dir);
 637         r = remove_numbered_files(dir, num, num);
 638         g_free(dir);
 639
 640         return r;
 641 }
 642
 643 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 644 {
 645         return news_get_article_cmd(session, "ARTICLE", num, filename);
 646 }
 647
 648 /**
 649  * news_select_group:
 650  * @session: Active NNTP session.
 651  * @group: Newsgroup name.
 652  * @num: Estimated number of articles.
 653  * @first: First article number.
 654  * @last: Last article number.
 655  *
 656  * Select newsgroup @group with the GROUP command if it is not already
 657  * selected in @session, or article numbers need to be returned.
 658  *
 659  * Return value: NNTP result code.
 660  **/
 661 static gint news_select_group(NNTPSession *session, const gchar *group,
 662                               gint *num, gint *first, gint *last)
 663 {
 664         gint ok;
 665         gint num_, first_, last_;
 666
 667         if (!num || !first || !last) {
 668                 if (session->group && g_strcasecmp(session->group, group) == 0)
 669                         return NN_SUCCESS;
 670                 num = &num_;
 671                 first = &first_;
 672                 last = &last_;
 673         }
 674
 675         g_free(session->group);
 676         session->group = NULL;
 677
 678         ok = nntp_group(session->nntp_sock, group, num, first, last);
 679         if (ok == NN_SUCCESS)
 680                 session->group = g_strdup(group);
 681
 682         return ok;
 683 }
 684
 685 static GSList *news_get_uncached_articles(NNTPSession *session,
 686                                           FolderItem *item, gint cache_last,
 687                                           gint *rfirst, gint *rlast)
 688 {
 689         gint ok;
 690         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 691         gchar buf[NNTPBUFSIZE];
 692         GSList *newlist = NULL;
 693         GSList *llast = NULL;
 694         MsgInfo *msginfo;
 695
 696         if (rfirst) *rfirst = -1;
 697         if (rlast)  *rlast  = -1;
 698
 699         g_return_val_if_fail(session != NULL, NULL);
 700         g_return_val_if_fail(item != NULL, NULL);
 701         g_return_val_if_fail(item->folder != NULL, NULL);
 702         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 703
 704         ok = news_select_group(session, item->path, &num, &first, &last);
 705         if (ok != NN_SUCCESS) {
 706                 log_warning(_("can't set group: %s\n"), item->path);
 707                 return NULL;
 708         }
 709
 710         /* calculate getting overview range */
 711         if (first > last) {
 712                 log_warning(_("invalid article range: %d - %d\n"),
 713                             first, last);
 714                 return NULL;
 715         }
 716
 717         if (rfirst) *rfirst = first;
 718         if (rlast)  *rlast  = last;
 719
 720         if (cache_last < first)
 721                 begin = first;
 722         else if (last < cache_last)
 723                 begin = first;
 724         else if (last == cache_last) {
 725                 debug_print(_("no new articles.\n"));
 726                 return NULL;
 727         } else
 728                 begin = cache_last + 1;
 729         end = last;
 730
 731         if (prefs_common.max_articles > 0 &&
 732             end - begin + 1 > prefs_common.max_articles)
 733                 begin = end - prefs_common.max_articles + 1;
 734
 735         log_message(_("getting xover %d - %d in %s...\n"),
 736                     begin, end, item->path);
 737         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 738                 log_warning(_("can't get xover\n"));
 739                 return NULL;
 740         }
 741
 742         for (;;) {
 743                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 744                         log_warning(_("error occurred while getting xover.\n"));
 745                         return newlist;
 746                 }
 747
 748                 if (buf[0] == '.' && buf[1] == '\r') break;
 749
 750                 msginfo = news_parse_xover(buf);
 751                 if (!msginfo) {
 752                         log_warning(_("invalid xover line: %s\n"), buf);
 753                         continue;
 754                 }
 755
 756                 msginfo->folder = item;
 757                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 758                 msginfo->flags.tmp_flags = MSG_NEWS;
 759                 msginfo->newsgroups = g_strdup(item->path);
 760
 761                 if (!newlist)
 762                         llast = newlist = g_slist_append(newlist, msginfo);
 763                 else {
 764                         llast = g_slist_append(llast, msginfo);
 765                         llast = llast->next;
 766                 }
 767         }
 768
 769         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 770                 log_warning(_("can't get xhdr\n"));
 771                 return newlist;
 772         }
 773
 774         llast = newlist;
 775
 776         for (;;) {
 777                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 778                         log_warning(_("error occurred while getting xhdr.\n"));
 779                         return newlist;
 780                 }
 781
 782                 if (buf[0] == '.' && buf[1] == '\r') break;
 783                 if (!llast) {
 784                         g_warning("llast == NULL\n");
 785                         continue;
 786                 }
 787
 788                 msginfo = (MsgInfo *)llast->data;
 789                 msginfo->to = news_parse_xhdr(buf, msginfo);
 790
 791                 llast = llast->next;
 792         }
 793
 794         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 795                 log_warning(_("can't get xhdr\n"));
 796                 return newlist;
 797         }
 798
 799         llast = newlist;
 800
 801         for (;;) {
 802                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 803                         log_warning(_("error occurred while getting xhdr.\n"));
 804                         return newlist;
 805                 }
 806
 807                 if (buf[0] == '.' && buf[1] == '\r') break;
 808                 if (!llast) {
 809                         g_warning("llast == NULL\n");
 810                         continue;
 811                 }
 812
 813                 msginfo = (MsgInfo *)llast->data;
 814                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 815
 816                 llast = llast->next;
 817         }
 818
 819         return newlist;
 820 }
 821
 822 #define PARSE_ONE_PARAM(p, srcp) \
 823 { \
 824         p = strchr(srcp, '\t'); \
 825         if (!p) return NULL; \
 826         else \
 827                 *p++ = '\0'; \
 828 }
 829
 830 static MsgInfo *news_parse_xover(const gchar *xover_str)
 831 {
 832         MsgInfo *msginfo;
 833         gchar buf[NNTPBUFSIZE];
 834         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 835         gchar *p;
 836         gint num, size_int, line_int;
 837         gchar *xover_buf;
 838
 839         Xstrdup_a(xover_buf, xover_str, return NULL);
 840
 841         PARSE_ONE_PARAM(subject, xover_buf);
 842         PARSE_ONE_PARAM(sender, subject);
 843         PARSE_ONE_PARAM(date, sender);
 844         PARSE_ONE_PARAM(msgid, date);
 845         PARSE_ONE_PARAM(ref, msgid);
 846         PARSE_ONE_PARAM(size, ref);
 847         PARSE_ONE_PARAM(line, size);
 848         PARSE_ONE_PARAM(xref, line);
 849
 850         tmp = strchr(xref, '\t');
 851         if (!tmp) tmp = strchr(line, '\r');
 852         if (!tmp) tmp = strchr(line, '\n');
 853         if (tmp) *tmp = '\0';
 854
 855         num = atoi(xover_str);
 856         size_int = atoi(size);
 857         line_int = atoi(line);
 858
 859         /* set MsgInfo */
 860         msginfo = procmsg_msginfo_new();
 861         msginfo->msgnum = num;
 862         msginfo->size = size_int;
 863
 864         msginfo->date = g_strdup(date);
 865         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 866
 867         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 868         msginfo->from = g_strdup(buf);
 869         msginfo->fromname = procheader_get_fromname(buf);
 870
 871         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 872         msginfo->subject = g_strdup(buf);
 873
 874         extract_parenthesis(msgid, '<', '>');
 875         remove_space(msgid);
 876         if (*msgid != '\0')
 877                 msginfo->msgid = g_strdup(msgid);
 878
 879         msginfo->references = g_strdup(ref);
 880         eliminate_parenthesis(ref, '(', ')');
 881         if ((p = strrchr(ref, '<')) != NULL) {
 882                 extract_parenthesis(p, '<', '>');
 883                 remove_space(p);
 884                 if (*p != '\0')
 885                         msginfo->inreplyto = g_strdup(p);
 886         }
 887
 888         msginfo->xref = g_strdup(xref);
 889         p = msginfo->xref+strlen(msginfo->xref) - 1;
 890         while (*p == '\r' || *p == '\n') {
 891                 *p = '\0';
 892                 p--;
 893         }
 894
 895         return msginfo;
 896 }
 897
 898 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 899 {
 900         gchar *p;
 901         gchar *tmp;
 902         gint num;
 903
 904         p = strchr(xhdr_str, ' ');
 905         if (!p)
 906                 return NULL;
 907         else
 908                 p++;
 909
 910         num = atoi(xhdr_str);
 911         if (msginfo->msgnum != num) return NULL;
 912
 913         tmp = strchr(p, '\r');
 914         if (!tmp) tmp = strchr(p, '\n');
 915
 916         if (tmp)
 917                 return g_strndup(p, tmp - p);
 918         else
 919                 return g_strdup(p);
 920 }
 921
 922 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 923                                         gint first)
 924 {
 925         GSList *cur, *next;
 926         MsgInfo *msginfo;
 927         gchar *dir;
 928
 929         g_return_val_if_fail(item != NULL, alist);
 930         g_return_val_if_fail(item->folder != NULL, alist);
 931         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 932
 933         if (first < 2) return alist;
 934
 935         debug_print("Deleting cached articles 1 - %d ...\n", first - 1);
 936
 937         dir = folder_item_get_path(item);
 938         remove_numbered_files(dir, 1, first - 1);
 939         g_free(dir);
 940
 941         for (cur = alist; cur != NULL; ) {
 942                 next = cur->next;
 943
 944                 msginfo = (MsgInfo *)cur->data;
 945                 if (msginfo && msginfo->msgnum < first) {
 946                         procmsg_msginfo_free(msginfo);
 947                         alist = g_slist_remove(alist, msginfo);
 948                 }
 949
 950                 cur = next;
 951         }
 952
 953         return alist;
 954 }
 955
 956 static void news_delete_all_articles(FolderItem *item)
 957 {
 958         gchar *dir;
 959
 960         g_return_if_fail(item != NULL);
 961         g_return_if_fail(item->folder != NULL);
 962         g_return_if_fail(item->folder->type == F_NEWS);
 963
 964         debug_print("Deleting all cached articles...\n");
 965
 966         dir = folder_item_get_path(item);
 967         remove_all_numbered_files(dir);
 968         g_free(dir);
 969 }
 970
 971 static void news_delete_expired_caches(GSList *alist, FolderItem *item)
 972 {
 973         gchar *dir;
 974
 975         g_return_if_fail(item != NULL);
 976         g_return_if_fail(item->folder != NULL);
 977         g_return_if_fail(item->folder->type == F_NEWS);
 978
 979         debug_print("Deleting expired cached articles...\n");
 980
 981         dir = folder_item_get_path(item);
 982         remove_expired_files(dir, 24 * 7);
 983         g_free(dir);
 984 }
 985
 986 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 987 {
 988         gchar * tmp;
 989         FILE * tmpfp;
 990         gchar buf[BUFFSIZE];
 991
 992         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 993                               G_DIR_SEPARATOR, (gint)msginfo);
 994         if (tmp == NULL)
 995                 return -1;
 996
 997         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 998                 FILE_OP_ERROR(tmp, "fopen");
 999                 return -1;
1000         }
1001         if (change_file_mode_rw(tmpfp, tmp) < 0) {
1002                 FILE_OP_ERROR(tmp, "chmod");
1003                 g_warning(_("can't change file mode\n"));
1004         }
1005
1006         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
1007         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
1008         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
1009         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
1010         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
1011         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
1012         get_rfc822_date(buf, sizeof(buf));
1013         fprintf(tmpfp, "Date: %s\r\n", buf);
1014         fprintf(tmpfp, "\r\n");
1015         fprintf(tmpfp, "removed with sylpheed\r\n");
1016
1017         fclose(tmpfp);
1018
1019         news_post(folder, tmp);
1020         remove(tmp);
1021
1022         g_free(tmp);
1023
1024         return 0;
1025 }
1026
1027 GSList *news_get_num_list(Folder *folder, FolderItem *item)
1028 {
1029         NNTPSession *session;
1030         gint i, ok, num, first, last;
1031         GSList *msgnum_list = NULL;
1032
1033         session = news_session_get(folder);
1034         g_return_val_if_fail(session != NULL, NULL);
1035         g_return_val_if_fail(item != NULL, NULL);
1036         g_return_val_if_fail(item->folder != NULL, NULL);
1037         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1038
1039         ok = news_select_group(session, item->path, &num, &first, &last);
1040         if (ok != NN_SUCCESS) {
1041                 log_warning(_("can't set group: %s\n"), item->path);
1042                 return NULL;
1043         }
1044
1045         if(last < first) {
1046                 log_warning(_("invalid article range: %d - %d\n"),
1047                             first, last);
1048                 return NULL;
1049         }
1050
1051         for(i = first; i <= last; i++) {
1052                 msgnum_list = g_slist_prepend(msgnum_list, GINT_TO_POINTER(i));
1053         }
1054
1055         return msgnum_list;
1056 }
1057
1058 #define READ_TO_LISTEND(hdr) \
1059         while (!(buf[0] == '.' && buf[1] == '\r')) { \
1060                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
1061                         log_warning(_("error occurred while getting %s.\n"), hdr); \
1062                         return msginfo; \
1063                 } \
1064         }
1065
1066 MsgInfo *news_fetch_msginfo(Folder *folder, FolderItem *item, gint num)
1067 {
1068         NNTPSession *session;
1069         MsgInfo *msginfo = NULL;
1070         gchar buf[NNTPBUFSIZE];
1071
1072         session = news_session_get(folder);
1073         g_return_val_if_fail(session != NULL, NULL);
1074         g_return_val_if_fail(item != NULL, NULL);
1075         g_return_val_if_fail(item->folder != NULL, NULL);
1076         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1077
1078         log_message(_("getting xover %d in %s...\n"),
1079                     num, item->path);
1080         if (nntp_xover(session->nntp_sock, num, num) != NN_SUCCESS) {
1081                 log_warning(_("can't get xover\n"));
1082                 return NULL;
1083         }
1084
1085         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1086                 log_warning(_("error occurred while getting xover.\n"));
1087                 return NULL;
1088         }
1089
1090         msginfo = news_parse_xover(buf);
1091         if (!msginfo) {
1092                 log_warning(_("invalid xover line: %s\n"), buf);
1093         }
1094
1095         READ_TO_LISTEND("xover");
1096
1097         if(!msginfo)
1098                 return NULL;
1099
1100         msginfo->folder = item;
1101         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1102         msginfo->flags.tmp_flags = MSG_NEWS;
1103         msginfo->newsgroups = g_strdup(item->path);
1104
1105         if (nntp_xhdr(session->nntp_sock, "to", num, num) != NN_SUCCESS) {
1106                 log_warning(_("can't get xhdr\n"));
1107                 return msginfo;
1108         }
1109
1110         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1111                 log_warning(_("error occurred while getting xhdr.\n"));
1112                 return msginfo;
1113         }
1114
1115         msginfo->to = news_parse_xhdr(buf, msginfo);
1116
1117         READ_TO_LISTEND("xhdr (to)");
1118
1119         if (nntp_xhdr(session->nntp_sock, "cc", num, num) != NN_SUCCESS) {
1120                 log_warning(_("can't get xhdr\n"));
1121                 return msginfo;
1122         }
1123
1124         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1125                 log_warning(_("error occurred while getting xhdr.\n"));
1126                 return msginfo;
1127         }
1128
1129         msginfo->cc = news_parse_xhdr(buf, msginfo);
1130
1131         READ_TO_LISTEND("xhdr (cc)");
1132
1133         return msginfo;
1134 }
1135
1136 static GSList *news_fetch_msginfo_from_to(NNTPSession *session, FolderItem *item, guint begin, guint end)
1137 {
1138         gchar buf[NNTPBUFSIZE];
1139         GSList *newlist = NULL;
1140         GSList *llast = NULL;
1141         MsgInfo *msginfo;
1142
1143         g_return_val_if_fail(session != NULL, NULL);
1144         g_return_val_if_fail(item != NULL, NULL);
1145
1146         log_message(_("getting xover %d - %d in %s...\n"),
1147                     begin, end, item->path);
1148         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
1149                 log_warning(_("can't get xover\n"));
1150                 return NULL;
1151         }
1152
1153         for (;;) {
1154                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1155                         log_warning(_("error occurred while getting xover.\n"));
1156                         return newlist;
1157                 }
1158
1159                 if (buf[0] == '.' && buf[1] == '\r') break;
1160
1161                 msginfo = news_parse_xover(buf);
1162                 if (!msginfo) {
1163                         log_warning(_("invalid xover line: %s\n"), buf);
1164                         continue;
1165                 }
1166
1167                 msginfo->folder = item;
1168                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1169                 msginfo->flags.tmp_flags = MSG_NEWS;
1170                 msginfo->newsgroups = g_strdup(item->path);
1171
1172                 if (!newlist)
1173                         llast = newlist = g_slist_append(newlist, msginfo);
1174                 else {
1175                         llast = g_slist_append(llast, msginfo);
1176                         llast = llast->next;
1177                 }
1178         }
1179
1180         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
1181                 log_warning(_("can't get xhdr\n"));
1182                 return newlist;
1183         }
1184
1185         llast = newlist;
1186
1187         for (;;) {
1188                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1189                         log_warning(_("error occurred while getting xhdr.\n"));
1190                         return newlist;
1191                 }
1192
1193                 if (buf[0] == '.' && buf[1] == '\r') break;
1194                 if (!llast) {
1195                         g_warning("llast == NULL\n");
1196                         continue;
1197                 }
1198
1199                 msginfo = (MsgInfo *)llast->data;
1200                 msginfo->to = news_parse_xhdr(buf, msginfo);
1201
1202                 llast = llast->next;
1203         }
1204
1205         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
1206                 log_warning(_("can't get xhdr\n"));
1207                 return newlist;
1208         }
1209
1210         llast = newlist;
1211
1212         for (;;) {
1213                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1214                         log_warning(_("error occurred while getting xhdr.\n"));
1215                         return newlist;
1216                 }
1217
1218                 if (buf[0] == '.' && buf[1] == '\r') break;
1219                 if (!llast) {
1220                         g_warning("llast == NULL\n");
1221                         continue;
1222                 }
1223
1224                 msginfo = (MsgInfo *)llast->data;
1225                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1226
1227                 llast = llast->next;
1228         }
1229
1230         return newlist;
1231 }
1232
1233 gint news_fetch_msgnum_sort(gconstpointer a, gconstpointer b)
1234 {
1235         return (GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b));
1236 }
1237
1238 GSList *news_fetch_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1239 {
1240         NNTPSession *session;
1241         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1242         guint first, last, next;
1243
1244         g_return_val_if_fail(folder != NULL, NULL);
1245         g_return_val_if_fail(folder->type == F_NEWS, NULL);
1246         g_return_val_if_fail(msgnum_list != NULL, NULL);
1247         g_return_val_if_fail(item != NULL, NULL);
1248
1249         session = news_session_get(folder);
1250         g_return_val_if_fail(session != NULL, NULL);
1251
1252         tmp_msgnum_list = g_slist_copy(msgnum_list);
1253         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, news_fetch_msgnum_sort);
1254
1255         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1256         last = first;
1257         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1258                 next = GPOINTER_TO_INT(elem->data);
1259                 if(next != (last + 1)) {
1260                         tmp_msginfo_list = news_fetch_msginfo_from_to(session, item, first, last);
1261                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1262                         first = next;
1263                 }
1264                 last = next;
1265         }
1266         tmp_msginfo_list = news_fetch_msginfo_from_to(session, item, first, last);
1267         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1268
1269         g_slist_free(tmp_msgnum_list);
1270
1271         return msginfo_list;
1272 }