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