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 gint news_post_stream                    (Folder        *folder,
 117                                           FILE          *fp);
 118
 119 Folder *news_folder_new(const gchar *name, const gchar *path)
 120 {
 121         Folder *folder;
 122
 123         folder = (Folder *)g_new0(NewsFolder, 1);
 124         news_folder_init(folder, name, path);
 125
 126         return folder;
 127 }
 128
 129 void news_folder_destroy(Folder *folder)
 130 {
 131         gchar *dir;
 132
 133         dir = folder_get_path(folder);
 134         if (is_dir_exist(dir))
 135                 remove_dir_recursive(dir);
 136         g_free(dir);
 137
 138         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 139 }
 140
 141 static void news_folder_init(Folder *folder, const gchar *name,
 142                              const gchar *path)
 143 {
 144         folder->type = F_NEWS;
 145
 146         folder_remote_folder_init(folder, name, path);
 147
 148 /*
 149         folder->get_msg_list = news_get_article_list;
 150 */
 151         folder->fetch_msg    = news_fetch_msg;
 152 /*
 153         folder->scan         = news_scan_group;
 154 */
 155         folder->destroy      = news_folder_destroy;
 156         folder->remove_msg   = news_remove_msg;
 157         folder->get_num_list = news_get_num_list;
 158         folder->fetch_msginfo = news_fetch_msginfo;
 159         folder->fetch_msginfos = news_fetch_msginfos;
 160 }
 161
 162 #if USE_SSL
 163 static Session *news_session_new(const gchar *server, gushort port,
 164                                  const gchar *userid, const gchar *passwd,
 165                                  SSLType ssl_type)
 166 #else
 167 static Session *news_session_new(const gchar *server, gushort port,
 168                                  const gchar *userid, const gchar *passwd)
 169 #endif
 170 {
 171         gchar buf[NNTPBUFSIZE];
 172         NNTPSession *session;
 173         NNTPSockInfo *nntp_sock;
 174
 175         g_return_val_if_fail(server != NULL, NULL);
 176
 177         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 178
 179 #if USE_SSL
 180         if (userid && passwd)
 181                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd,
 182                                            ssl_type);
 183         else
 184                 nntp_sock = nntp_open(server, port, buf, ssl_type);
 185 #else
 186         if (userid && passwd)
 187                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd);
 188         else
 189                 nntp_sock = nntp_open(server, port, buf);
 190 #endif
 191
 192         if (nntp_sock == NULL)
 193                 return NULL;
 194
 195         session = g_new(NNTPSession, 1);
 196         SESSION(session)->type             = SESSION_NEWS;
 197         SESSION(session)->server           = g_strdup(server);
 198         session->nntp_sock                 = nntp_sock;
 199         SESSION(session)->sock             = nntp_sock->sock;
 200         SESSION(session)->connected        = TRUE;
 201         SESSION(session)->phase            = SESSION_READY;
 202         SESSION(session)->last_access_time = time(NULL);
 203         SESSION(session)->data             = NULL;
 204
 205         SESSION(session)->destroy          = news_session_destroy;
 206
 207         session->group = NULL;
 208
 209         return SESSION(session);
 210 }
 211
 212 void news_session_destroy(Session *session)
 213 {
 214         nntp_close(NNTP_SESSION(session)->nntp_sock);
 215         NNTP_SESSION(session)->nntp_sock = NULL;
 216         session->sock = NULL;
 217
 218         g_free(NNTP_SESSION(session)->group);
 219 }
 220
 221 static Session *news_session_new_for_folder(Folder *folder)
 222 {
 223         Session *session;
 224         PrefsAccount *ac;
 225         const gchar *userid = NULL;
 226         gchar *passwd = NULL;
 227         gushort port;
 228
 229         g_return_val_if_fail(folder != NULL, NULL);
 230         g_return_val_if_fail(folder->account != NULL, NULL);
 231
 232         ac = folder->account;
 233         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 234                 userid = ac->userid;
 235                 if (ac->passwd && ac->passwd[0])
 236                         passwd = g_strdup(ac->passwd);
 237                 else
 238                         passwd = input_dialog_query_password(ac->nntp_server,
 239                                                              userid);
 240         }
 241
 242 #if USE_SSL
 243         port = ac->set_nntpport ? ac->nntpport
 244                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 245         session = news_session_new(ac->nntp_server, port, userid, passwd,
 246                                    ac->ssl_nntp);
 247 #else
 248         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 249         session = news_session_new(ac->nntp_server, port, userid, passwd);
 250 #endif
 251
 252         g_free(passwd);
 253
 254         return session;
 255 }
 256
 257 NNTPSession *news_session_get(Folder *folder)
 258 {
 259         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 260
 261         g_return_val_if_fail(folder != NULL, NULL);
 262         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 263         g_return_val_if_fail(folder->account != NULL, NULL);
 264
 265         if (!rfolder->session) {
 266                 rfolder->session = news_session_new_for_folder(folder);
 267                 statusbar_pop_all();
 268                 return NNTP_SESSION(rfolder->session);
 269         }
 270
 271         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 272                 rfolder->session->last_access_time = time(NULL);
 273                 statusbar_pop_all();
 274                 return NNTP_SESSION(rfolder->session);
 275         }
 276
 277         if (nntp_mode(NNTP_SESSION(rfolder->session)->nntp_sock, FALSE)
 278             != NN_SUCCESS) {
 279                 log_warning(_("NNTP connection to %s:%d has been"
 280                               " disconnected. Reconnecting...\n"),
 281                             folder->account->nntp_server,
 282                             folder->account->set_nntpport ?
 283                             folder->account->nntpport : NNTP_PORT);
 284                 session_destroy(rfolder->session);
 285                 rfolder->session = news_session_new_for_folder(folder);
 286         }
 287
 288         if (rfolder->session)
 289                 rfolder->session->last_access_time = time(NULL);
 290         statusbar_pop_all();
 291         return NNTP_SESSION(rfolder->session);
 292 }
 293
 294 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 295                               gboolean use_cache)
 296 {
 297         GSList *alist;
 298         NNTPSession *session;
 299
 300         g_return_val_if_fail(folder != NULL, NULL);
 301         g_return_val_if_fail(item != NULL, NULL);
 302         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 303
 304         session = news_session_get(folder);
 305
 306         if (!session) {
 307                 alist = procmsg_read_cache(item, FALSE);
 308                 item->last_num = procmsg_get_last_num_in_msg_list(alist);
 309         } else if (use_cache) {
 310                 GSList *newlist;
 311                 gint cache_last;
 312                 gint first, last;
 313
 314                 alist = procmsg_read_cache(item, FALSE);
 315
 316                 cache_last = procmsg_get_last_num_in_msg_list(alist);
 317                 newlist = news_get_uncached_articles
 318                         (session, item, cache_last, &first, &last);
 319                 if (first == 0 && last == 0) {
 320                         news_delete_all_articles(item);
 321                         procmsg_msg_list_free(alist);
 322                         alist = NULL;
 323                 } else {
 324                         alist = news_delete_old_articles(alist, item, first);
 325                         news_delete_expired_caches(alist, item);
 326                 }
 327
 328                 alist = g_slist_concat(alist, newlist);
 329
 330                 item->last_num = last;
 331         } else {
 332                 gint last;
 333
 334                 alist = news_get_uncached_articles
 335                         (session, item, 0, NULL, &last);
 336                 news_delete_all_articles(item);
 337                 item->last_num = last;
 338         }
 339
 340         procmsg_set_flags(alist, item);
 341
 342         statusbar_pop_all();
 343
 344         return alist;
 345 }
 346
 347 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 348 {
 349         gchar *path, *filename;
 350         NNTPSession *session;
 351         gint ok;
 352
 353         g_return_val_if_fail(folder != NULL, NULL);
 354         g_return_val_if_fail(item != NULL, NULL);
 355
 356         path = folder_item_get_path(item);
 357         if (!is_dir_exist(path))
 358                 make_dir_hier(path);
 359         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 360         g_free(path);
 361
 362         if (is_file_exist(filename)) {
 363                 debug_print("article %d has been already cached.\n", num);
 364                 return filename;
 365         }
 366
 367         session = news_session_get(folder);
 368         if (!session) {
 369                 g_free(filename);
 370                 return NULL;
 371         }
 372
 373         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 374         statusbar_pop_all();
 375         if (ok != NN_SUCCESS) {
 376                 g_warning(_("can't select group %s\n"), item->path);
 377                 g_free(filename);
 378                 return NULL;
 379         }
 380
 381         debug_print("getting article %d...\n", num);
 382         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 383                               num, filename);
 384         statusbar_pop_all();
 385         if (ok < 0) {
 386                 g_warning(_("can't read article %d\n"), num);
 387                 g_free(filename);
 388                 return NULL;
 389         }
 390
 391         return filename;
 392 }
 393
 394 gint news_scan_group(Folder *folder, FolderItem *item)
 395 {
 396         NNTPSession *session;
 397         gint num = 0, first = 0, last = 0;
 398         gint ok;
 399
 400         g_return_val_if_fail(folder != NULL, -1);
 401         g_return_val_if_fail(item != NULL, -1);
 402
 403         session = news_session_get(folder);
 404         if (!session) return -1;
 405
 406         ok = news_select_group(session, item->path, &num, &first, &last);
 407         if (ok != NN_SUCCESS) {
 408                 log_warning(_("can't set group: %s\n"), item->path);
 409                 return -1;
 410         }
 411
 412         if (num == 0) {
 413                 item->new = item->unread = item->total = item->last_num = 0;
 414                 return 0;
 415         }
 416
 417 /*
 418         path = folder_item_get_path(item);
 419         if (path && is_dir_exist(path)) {
 420                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 421                                      first);
 422         }
 423         g_free(path);
 424
 425         if (max < first || last < min)
 426                 new = unread = total = num;
 427         else {
 428                 if (min < first)
 429                         min = first;
 430
 431                 if (last < max)
 432                         max = last;
 433                 else if (max < last) {
 434                         new += last - max;
 435                         unread += last - max;
 436                 }
 437
 438                 if (new > num) new = num;
 439                 if (unread > num) unread = num;
 440         }
 441
 442         item->new = new;
 443         item->unread = unread;
 444         item->total = num;
 445         item->last_num = last;
 446 */
 447         return 0;
 448 }
 449
 450 static NewsGroupInfo *news_group_info_new(const gchar *name,
 451                                           gint first, gint last, gchar type)
 452 {
 453         NewsGroupInfo *ginfo;
 454
 455         ginfo = g_new(NewsGroupInfo, 1);
 456         ginfo->name = g_strdup(name);
 457         ginfo->first = first;
 458         ginfo->last = last;
 459         ginfo->type = type;
 460
 461         return ginfo;
 462 }
 463
 464 static void news_group_info_free(NewsGroupInfo *ginfo)
 465 {
 466         g_free(ginfo->name);
 467         g_free(ginfo);
 468 }
 469
 470 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 471                                     NewsGroupInfo *ginfo2)
 472 {
 473         return g_strcasecmp(ginfo1->name, ginfo2->name);
 474 }
 475
 476 GSList *news_get_group_list(Folder *folder)
 477 {
 478         gchar *path, *filename;
 479         FILE *fp;
 480         GSList *list = NULL;
 481         GSList *last = NULL;
 482         gchar buf[NNTPBUFSIZE];
 483
 484         g_return_val_if_fail(folder != NULL, NULL);
 485         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 486
 487         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 488         if (!is_dir_exist(path))
 489                 make_dir_hier(path);
 490         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 491         g_free(path);
 492
 493         if ((fp = fopen(filename, "rb")) == NULL) {
 494                 NNTPSession *session;
 495
 496                 session = news_session_get(folder);
 497                 if (!session) {
 498                         g_free(filename);
 499                         return NULL;
 500                 }
 501
 502                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 503                         g_free(filename);
 504                         statusbar_pop_all();
 505                         return NULL;
 506                 }
 507                 statusbar_pop_all();
 508                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 509                         log_warning(_("can't retrieve newsgroup list\n"));
 510                         session_destroy(SESSION(session));
 511                         REMOTE_FOLDER(folder)->session = NULL;
 512                         g_free(filename);
 513                         return NULL;
 514                 }
 515
 516                 if ((fp = fopen(filename, "rb")) == NULL) {
 517                         FILE_OP_ERROR(filename, "fopen");
 518                         g_free(filename);
 519                         return NULL;
 520                 }
 521         }
 522
 523         while (fgets(buf, sizeof(buf), fp) != NULL) {
 524                 gchar *p = buf;
 525                 gchar *name;
 526                 gint last_num;
 527                 gint first_num;
 528                 gchar type;
 529                 NewsGroupInfo *ginfo;
 530
 531                 p = strchr(p, ' ');
 532                 if (!p) continue;
 533                 *p = '\0';
 534                 p++;
 535                 name = buf;
 536
 537                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 538                         continue;
 539
 540                 ginfo = news_group_info_new(name, first_num, last_num, type);
 541
 542                 if (!last)
 543                         last = list = g_slist_append(NULL, ginfo);
 544                 else {
 545                         last = g_slist_append(last, ginfo);
 546                         last = last->next;
 547                 }
 548         }
 549
 550         fclose(fp);
 551         g_free(filename);
 552
 553         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 554
 555         statusbar_pop_all();
 556
 557         return list;
 558 }
 559
 560 void news_group_list_free(GSList *group_list)
 561 {
 562         GSList *cur;
 563
 564         if (!group_list) return;
 565
 566         for (cur = group_list; cur != NULL; cur = cur->next)
 567                 news_group_info_free((NewsGroupInfo *)cur->data);
 568         g_slist_free(group_list);
 569 }
 570
 571 void news_remove_group_list_cache(Folder *folder)
 572 {
 573         gchar *path, *filename;
 574
 575         g_return_if_fail(folder != NULL);
 576         g_return_if_fail(folder->type == F_NEWS);
 577
 578         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 579         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 580         g_free(path);
 581
 582         if (is_file_exist(filename)) {
 583                 if (remove(filename) < 0)
 584                         FILE_OP_ERROR(filename, "remove");
 585         }
 586         g_free(filename);
 587 }
 588
 589 gint news_post(Folder *folder, const gchar *file)
 590 {
 591         FILE *fp;
 592         gint ok;
 593
 594         g_return_val_if_fail(folder != NULL, -1);
 595         g_return_val_if_fail(folder->type == F_NEWS, -1);
 596         g_return_val_if_fail(file != NULL, -1);
 597
 598         if ((fp = fopen(file, "rb")) == NULL) {
 599                 FILE_OP_ERROR(file, "fopen");
 600                 return -1;
 601         }
 602
 603         ok = news_post_stream(folder, fp);
 604
 605         fclose(fp);
 606
 607         statusbar_pop_all();
 608
 609         return ok;
 610 }
 611
 612 gint news_post_stream(Folder *folder, FILE *fp)
 613 {
 614         NNTPSession *session;
 615         gint ok;
 616
 617         g_return_val_if_fail(folder != NULL, -1);
 618         g_return_val_if_fail(folder->type == F_NEWS, -1);
 619         g_return_val_if_fail(fp != NULL, -1);
 620
 621         session = news_session_get(folder);
 622         if (!session) return -1;
 623
 624         ok = nntp_post(session->nntp_sock, fp);
 625         if (ok != NN_SUCCESS) {
 626                 log_warning(_("can't post article.\n"));
 627                 return -1;
 628         }
 629
 630         return 0;
 631 }
 632
 633 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 634                                  gint num, gchar *filename)
 635 {
 636         gchar *msgid;
 637
 638         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 639             != NN_SUCCESS)
 640                 return -1;
 641
 642         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 643         g_free(msgid);
 644
 645         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 646                 log_warning(_("can't retrieve article %d\n"), num);
 647                 return -1;
 648         }
 649
 650         return 0;
 651 }
 652
 653 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 654 {
 655         gchar * dir;
 656         gint r;
 657
 658         dir = folder_item_get_path(item);
 659         printf("removing %d in %s\n",num,dir);
 660         r = remove_numbered_files(dir, num, num);
 661         g_free(dir);
 662
 663         return r;
 664 }
 665
 666 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 667 {
 668         return news_get_article_cmd(session, "ARTICLE", num, filename);
 669 }
 670
 671 /**
 672  * news_select_group:
 673  * @session: Active NNTP session.
 674  * @group: Newsgroup name.
 675  * @num: Estimated number of articles.
 676  * @first: First article number.
 677  * @last: Last article number.
 678  *
 679  * Select newsgroup @group with the GROUP command if it is not already
 680  * selected in @session, or article numbers need to be returned.
 681  *
 682  * Return value: NNTP result code.
 683  **/
 684 static gint news_select_group(NNTPSession *session, const gchar *group,
 685                               gint *num, gint *first, gint *last)
 686 {
 687         gint ok;
 688         gint num_, first_, last_;
 689
 690         if (!num || !first || !last) {
 691                 if (session->group && g_strcasecmp(session->group, group) == 0)
 692                         return NN_SUCCESS;
 693                 num = &num_;
 694                 first = &first_;
 695                 last = &last_;
 696         }
 697
 698         g_free(session->group);
 699         session->group = NULL;
 700
 701         ok = nntp_group(session->nntp_sock, group, num, first, last);
 702         if (ok == NN_SUCCESS)
 703                 session->group = g_strdup(group);
 704
 705         return ok;
 706 }
 707
 708 static GSList *news_get_uncached_articles(NNTPSession *session,
 709                                           FolderItem *item, gint cache_last,
 710                                           gint *rfirst, gint *rlast)
 711 {
 712         gint ok;
 713         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 714         gchar buf[NNTPBUFSIZE];
 715         GSList *newlist = NULL;
 716         GSList *llast = NULL;
 717         MsgInfo *msginfo;
 718
 719         if (rfirst) *rfirst = -1;
 720         if (rlast)  *rlast  = -1;
 721
 722         g_return_val_if_fail(session != NULL, NULL);
 723         g_return_val_if_fail(item != NULL, NULL);
 724         g_return_val_if_fail(item->folder != NULL, NULL);
 725         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 726
 727         ok = news_select_group(session, item->path, &num, &first, &last);
 728         if (ok != NN_SUCCESS) {
 729                 log_warning(_("can't set group: %s\n"), item->path);
 730                 return NULL;
 731         }
 732
 733         /* calculate getting overview range */
 734         if (first > last) {
 735                 log_warning(_("invalid article range: %d - %d\n"),
 736                             first, last);
 737                 return NULL;
 738         }
 739
 740         if (rfirst) *rfirst = first;
 741         if (rlast)  *rlast  = last;
 742
 743         if (cache_last < first)
 744                 begin = first;
 745         else if (last < cache_last)
 746                 begin = first;
 747         else if (last == cache_last) {
 748                 debug_print("no new articles.\n");
 749                 return NULL;
 750         } else
 751                 begin = cache_last + 1;
 752         end = last;
 753
 754         if (prefs_common.max_articles > 0 &&
 755             end - begin + 1 > prefs_common.max_articles)
 756                 begin = end - prefs_common.max_articles + 1;
 757
 758         log_message(_("getting xover %d - %d in %s...\n"),
 759                     begin, end, item->path);
 760         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 761                 log_warning(_("can't get xover\n"));
 762                 return NULL;
 763         }
 764
 765         for (;;) {
 766                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 767                         log_warning(_("error occurred while getting xover.\n"));
 768                         return newlist;
 769                 }
 770
 771                 if (buf[0] == '.' && buf[1] == '\r') break;
 772
 773                 msginfo = news_parse_xover(buf);
 774                 if (!msginfo) {
 775                         log_warning(_("invalid xover line: %s\n"), buf);
 776                         continue;
 777                 }
 778
 779                 msginfo->folder = item;
 780                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 781                 msginfo->flags.tmp_flags = MSG_NEWS;
 782                 msginfo->newsgroups = g_strdup(item->path);
 783
 784                 if (!newlist)
 785                         llast = newlist = g_slist_append(newlist, msginfo);
 786                 else {
 787                         llast = g_slist_append(llast, msginfo);
 788                         llast = llast->next;
 789                 }
 790         }
 791
 792         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 793                 log_warning(_("can't get xhdr\n"));
 794                 return newlist;
 795         }
 796
 797         llast = newlist;
 798
 799         for (;;) {
 800                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 801                         log_warning(_("error occurred while getting xhdr.\n"));
 802                         return newlist;
 803                 }
 804
 805                 if (buf[0] == '.' && buf[1] == '\r') break;
 806                 if (!llast) {
 807                         g_warning("llast == NULL\n");
 808                         continue;
 809                 }
 810
 811                 msginfo = (MsgInfo *)llast->data;
 812                 msginfo->to = news_parse_xhdr(buf, msginfo);
 813
 814                 llast = llast->next;
 815         }
 816
 817         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 818                 log_warning(_("can't get xhdr\n"));
 819                 return newlist;
 820         }
 821
 822         llast = newlist;
 823
 824         for (;;) {
 825                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 826                         log_warning(_("error occurred while getting xhdr.\n"));
 827                         return newlist;
 828                 }
 829
 830                 if (buf[0] == '.' && buf[1] == '\r') break;
 831                 if (!llast) {
 832                         g_warning("llast == NULL\n");
 833                         continue;
 834                 }
 835
 836                 msginfo = (MsgInfo *)llast->data;
 837                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 838
 839                 llast = llast->next;
 840         }
 841
 842         return newlist;
 843 }
 844
 845 #define PARSE_ONE_PARAM(p, srcp) \
 846 { \
 847         p = strchr(srcp, '\t'); \
 848         if (!p) return NULL; \
 849         else \
 850                 *p++ = '\0'; \
 851 }
 852
 853 static MsgInfo *news_parse_xover(const gchar *xover_str)
 854 {
 855         MsgInfo *msginfo;
 856         gchar buf[NNTPBUFSIZE];
 857         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 858         gchar *p;
 859         gint num, size_int, line_int;
 860         gchar *xover_buf;
 861
 862         Xstrdup_a(xover_buf, xover_str, return NULL);
 863
 864         PARSE_ONE_PARAM(subject, xover_buf);
 865         PARSE_ONE_PARAM(sender, subject);
 866         PARSE_ONE_PARAM(date, sender);
 867         PARSE_ONE_PARAM(msgid, date);
 868         PARSE_ONE_PARAM(ref, msgid);
 869         PARSE_ONE_PARAM(size, ref);
 870         PARSE_ONE_PARAM(line, size);
 871         PARSE_ONE_PARAM(xref, line);
 872
 873         tmp = strchr(xref, '\t');
 874         if (!tmp) tmp = strchr(line, '\r');
 875         if (!tmp) tmp = strchr(line, '\n');
 876         if (tmp) *tmp = '\0';
 877
 878         num = atoi(xover_str);
 879         size_int = atoi(size);
 880         line_int = atoi(line);
 881
 882         /* set MsgInfo */
 883         msginfo = procmsg_msginfo_new();
 884         msginfo->msgnum = num;
 885         msginfo->size = size_int;
 886
 887         msginfo->date = g_strdup(date);
 888         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 889
 890         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 891         msginfo->from = g_strdup(buf);
 892         msginfo->fromname = procheader_get_fromname(buf);
 893
 894         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 895         msginfo->subject = g_strdup(buf);
 896
 897         extract_parenthesis(msgid, '<', '>');
 898         remove_space(msgid);
 899         if (*msgid != '\0')
 900                 msginfo->msgid = g_strdup(msgid);
 901
 902         msginfo->references = g_strdup(ref);
 903         eliminate_parenthesis(ref, '(', ')');
 904         if ((p = strrchr(ref, '<')) != NULL) {
 905                 extract_parenthesis(p, '<', '>');
 906                 remove_space(p);
 907                 if (*p != '\0')
 908                         msginfo->inreplyto = g_strdup(p);
 909         }
 910
 911         msginfo->xref = g_strdup(xref);
 912         p = msginfo->xref+strlen(msginfo->xref) - 1;
 913         while (*p == '\r' || *p == '\n') {
 914                 *p = '\0';
 915                 p--;
 916         }
 917
 918         return msginfo;
 919 }
 920
 921 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 922 {
 923         gchar *p;
 924         gchar *tmp;
 925         gint num;
 926
 927         p = strchr(xhdr_str, ' ');
 928         if (!p)
 929                 return NULL;
 930         else
 931                 p++;
 932
 933         num = atoi(xhdr_str);
 934         if (msginfo->msgnum != num) return NULL;
 935
 936         tmp = strchr(p, '\r');
 937         if (!tmp) tmp = strchr(p, '\n');
 938
 939         if (tmp)
 940                 return g_strndup(p, tmp - p);
 941         else
 942                 return g_strdup(p);
 943 }
 944
 945 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 946                                         gint first)
 947 {
 948         GSList *cur, *next;
 949         MsgInfo *msginfo;
 950         gchar *dir;
 951
 952         g_return_val_if_fail(item != NULL, alist);
 953         g_return_val_if_fail(item->folder != NULL, alist);
 954         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 955
 956         if (first < 2) return alist;
 957
 958         debug_print("Deleting cached articles 1 - %d ...\n", first - 1);
 959
 960         dir = folder_item_get_path(item);
 961         remove_numbered_files(dir, 1, first - 1);
 962         g_free(dir);
 963
 964         for (cur = alist; cur != NULL; ) {
 965                 next = cur->next;
 966
 967                 msginfo = (MsgInfo *)cur->data;
 968                 if (msginfo && msginfo->msgnum < first) {
 969                         procmsg_msginfo_free(msginfo);
 970                         alist = g_slist_remove(alist, msginfo);
 971                 }
 972
 973                 cur = next;
 974         }
 975
 976         return alist;
 977 }
 978
 979 static void news_delete_all_articles(FolderItem *item)
 980 {
 981         gchar *dir;
 982
 983         g_return_if_fail(item != NULL);
 984         g_return_if_fail(item->folder != NULL);
 985         g_return_if_fail(item->folder->type == F_NEWS);
 986
 987         debug_print("Deleting all cached articles...\n");
 988
 989         dir = folder_item_get_path(item);
 990         remove_all_numbered_files(dir);
 991         g_free(dir);
 992 }
 993
 994 static void news_delete_expired_caches(GSList *alist, FolderItem *item)
 995 {
 996         gchar *dir;
 997
 998         g_return_if_fail(item != NULL);
 999         g_return_if_fail(item->folder != NULL);
1000         g_return_if_fail(item->folder->type == F_NEWS);
1001
1002         debug_print("Deleting expired cached articles...\n");
1003
1004         dir = folder_item_get_path(item);
1005         remove_expired_files(dir, 24 * 7);
1006         g_free(dir);
1007 }
1008
1009 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
1010 {
1011         gchar * tmp;
1012         FILE * tmpfp;
1013         gchar buf[BUFFSIZE];
1014
1015         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
1016                               G_DIR_SEPARATOR, (gint)msginfo);
1017         if (tmp == NULL)
1018                 return -1;
1019
1020         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
1021                 FILE_OP_ERROR(tmp, "fopen");
1022                 return -1;
1023         }
1024         if (change_file_mode_rw(tmpfp, tmp) < 0) {
1025                 FILE_OP_ERROR(tmp, "chmod");
1026                 g_warning(_("can't change file mode\n"));
1027         }
1028
1029         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
1030         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
1031         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
1032         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
1033         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
1034         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
1035         get_rfc822_date(buf, sizeof(buf));
1036         fprintf(tmpfp, "Date: %s\r\n", buf);
1037         fprintf(tmpfp, "\r\n");
1038         fprintf(tmpfp, "removed with sylpheed\r\n");
1039
1040         fclose(tmpfp);
1041
1042         news_post(folder, tmp);
1043         remove(tmp);
1044
1045         g_free(tmp);
1046
1047         return 0;
1048 }
1049
1050 GSList *news_get_num_list(Folder *folder, FolderItem *item)
1051 {
1052         NNTPSession *session;
1053         gint i, ok, num, first, last;
1054         GSList *msgnum_list = NULL;
1055         gchar *dir;
1056
1057         session = news_session_get(folder);
1058         g_return_val_if_fail(session != NULL, NULL);
1059         g_return_val_if_fail(item != NULL, NULL);
1060         g_return_val_if_fail(item->folder != NULL, NULL);
1061         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1062
1063         ok = news_select_group(session, item->path, &num, &first, &last);
1064         if (ok != NN_SUCCESS) {
1065                 log_warning(_("can't set group: %s\n"), item->path);
1066                 return NULL;
1067         }
1068
1069         if(last < first) {
1070                 log_warning(_("invalid article range: %d - %d\n"),
1071                             first, last);
1072                 return NULL;
1073         }
1074
1075         for(i = first; i <= last; i++) {
1076                 msgnum_list = g_slist_prepend(msgnum_list, GINT_TO_POINTER(i));
1077         }
1078
1079         dir = folder_item_get_path(item);
1080         debug_print("removing old messages from %d to %d in %s\n", first, last, dir);
1081         remove_numbered_files(dir, 1, first - 1);
1082         g_free(dir);
1083
1084         return msgnum_list;
1085 }
1086
1087 #define READ_TO_LISTEND(hdr) \
1088         while (!(buf[0] == '.' && buf[1] == '\r')) { \
1089                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
1090                         log_warning(_("error occurred while getting %s.\n"), hdr); \
1091                         return msginfo; \
1092                 } \
1093         }
1094
1095 MsgInfo *news_fetch_msginfo(Folder *folder, FolderItem *item, gint num)
1096 {
1097         NNTPSession *session;
1098         MsgInfo *msginfo = NULL;
1099         gchar buf[NNTPBUFSIZE];
1100
1101         session = news_session_get(folder);
1102         g_return_val_if_fail(session != NULL, NULL);
1103         g_return_val_if_fail(item != NULL, NULL);
1104         g_return_val_if_fail(item->folder != NULL, NULL);
1105         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1106
1107         log_message(_("getting xover %d in %s...\n"),
1108                     num, item->path);
1109         if (nntp_xover(session->nntp_sock, num, num) != NN_SUCCESS) {
1110                 log_warning(_("can't get xover\n"));
1111                 return NULL;
1112         }
1113
1114         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1115                 log_warning(_("error occurred while getting xover.\n"));
1116                 return NULL;
1117         }
1118
1119         msginfo = news_parse_xover(buf);
1120         if (!msginfo) {
1121                 log_warning(_("invalid xover line: %s\n"), buf);
1122         }
1123
1124         READ_TO_LISTEND("xover");
1125
1126         if(!msginfo)
1127                 return NULL;
1128
1129         msginfo->folder = item;
1130         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1131         msginfo->flags.tmp_flags = MSG_NEWS;
1132         msginfo->newsgroups = g_strdup(item->path);
1133
1134         if (nntp_xhdr(session->nntp_sock, "to", num, num) != NN_SUCCESS) {
1135                 log_warning(_("can't get xhdr\n"));
1136                 return msginfo;
1137         }
1138
1139         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1140                 log_warning(_("error occurred while getting xhdr.\n"));
1141                 return msginfo;
1142         }
1143
1144         msginfo->to = news_parse_xhdr(buf, msginfo);
1145
1146         READ_TO_LISTEND("xhdr (to)");
1147
1148         if (nntp_xhdr(session->nntp_sock, "cc", num, num) != NN_SUCCESS) {
1149                 log_warning(_("can't get xhdr\n"));
1150                 return msginfo;
1151         }
1152
1153         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1154                 log_warning(_("error occurred while getting xhdr.\n"));
1155                 return msginfo;
1156         }
1157
1158         msginfo->cc = news_parse_xhdr(buf, msginfo);
1159
1160         READ_TO_LISTEND("xhdr (cc)");
1161
1162         return msginfo;
1163 }
1164
1165 static GSList *news_fetch_msginfo_from_to(NNTPSession *session, FolderItem *item, guint begin, guint end)
1166 {
1167         gchar buf[NNTPBUFSIZE];
1168         GSList *newlist = NULL;
1169         GSList *llast = NULL;
1170         MsgInfo *msginfo;
1171
1172         g_return_val_if_fail(session != NULL, NULL);
1173         g_return_val_if_fail(item != NULL, NULL);
1174
1175         log_message(_("getting xover %d - %d in %s...\n"),
1176                     begin, end, item->path);
1177         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
1178                 log_warning(_("can't get xover\n"));
1179                 return NULL;
1180         }
1181
1182         for (;;) {
1183                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1184                         log_warning(_("error occurred while getting xover.\n"));
1185                         return newlist;
1186                 }
1187
1188                 if (buf[0] == '.' && buf[1] == '\r') break;
1189
1190                 msginfo = news_parse_xover(buf);
1191                 if (!msginfo) {
1192                         log_warning(_("invalid xover line: %s\n"), buf);
1193                         continue;
1194                 }
1195
1196                 msginfo->folder = item;
1197                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1198                 msginfo->flags.tmp_flags = MSG_NEWS;
1199                 msginfo->newsgroups = g_strdup(item->path);
1200
1201                 if (!newlist)
1202                         llast = newlist = g_slist_append(newlist, msginfo);
1203                 else {
1204                         llast = g_slist_append(llast, msginfo);
1205                         llast = llast->next;
1206                 }
1207         }
1208
1209         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
1210                 log_warning(_("can't get xhdr\n"));
1211                 return newlist;
1212         }
1213
1214         llast = newlist;
1215
1216         for (;;) {
1217                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1218                         log_warning(_("error occurred while getting xhdr.\n"));
1219                         return newlist;
1220                 }
1221
1222                 if (buf[0] == '.' && buf[1] == '\r') break;
1223                 if (!llast) {
1224                         g_warning("llast == NULL\n");
1225                         continue;
1226                 }
1227
1228                 msginfo = (MsgInfo *)llast->data;
1229                 msginfo->to = news_parse_xhdr(buf, msginfo);
1230
1231                 llast = llast->next;
1232         }
1233
1234         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
1235                 log_warning(_("can't get xhdr\n"));
1236                 return newlist;
1237         }
1238
1239         llast = newlist;
1240
1241         for (;;) {
1242                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1243                         log_warning(_("error occurred while getting xhdr.\n"));
1244                         return newlist;
1245                 }
1246
1247                 if (buf[0] == '.' && buf[1] == '\r') break;
1248                 if (!llast) {
1249                         g_warning("llast == NULL\n");
1250                         continue;
1251                 }
1252
1253                 msginfo = (MsgInfo *)llast->data;
1254                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1255
1256                 llast = llast->next;
1257         }
1258
1259         return newlist;
1260 }
1261
1262 gint news_fetch_msgnum_sort(gconstpointer a, gconstpointer b)
1263 {
1264         return (GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b));
1265 }
1266
1267 GSList *news_fetch_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1268 {
1269         NNTPSession *session;
1270         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1271         guint first, last, next;
1272
1273         g_return_val_if_fail(folder != NULL, NULL);
1274         g_return_val_if_fail(folder->type == F_NEWS, NULL);
1275         g_return_val_if_fail(msgnum_list != NULL, NULL);
1276         g_return_val_if_fail(item != NULL, NULL);
1277
1278         session = news_session_get(folder);
1279         g_return_val_if_fail(session != NULL, NULL);
1280
1281         tmp_msgnum_list = g_slist_copy(msgnum_list);
1282         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, news_fetch_msgnum_sort);
1283
1284         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1285         last = first;
1286         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1287                 next = GPOINTER_TO_INT(elem->data);
1288                 if(next != (last + 1)) {
1289                         tmp_msginfo_list = news_fetch_msginfo_from_to(session, item, first, last);
1290                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1291                         first = next;
1292                 }
1293                 last = next;
1294         }
1295         tmp_msginfo_list = news_fetch_msginfo_from_to(session, item, first, last);
1296         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1297
1298         g_slist_free(tmp_msgnum_list);
1299
1300         return msginfo_list;
1301 }