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                 else if (first < min) {
 428                         num -= min - first;
 429                         first = min;
 430                 }
 431
 432                 if (last < max)
 433                         max = last;
 434                 else if (max < last) {
 435                         new += last - max;
 436                         unread += last - max;
 437                 }
 438
 439                 if (new > num) new = num;
 440                 if (unread > num) unread = num;
 441         }
 442
 443         item->new = new;
 444         item->unread = unread;
 445         item->total = num;
 446         item->last_num = last;
 447 */
 448         return 0;
 449 }
 450
 451 static NewsGroupInfo *news_group_info_new(const gchar *name,
 452                                           gint first, gint last, gchar type)
 453 {
 454         NewsGroupInfo *ginfo;
 455
 456         ginfo = g_new(NewsGroupInfo, 1);
 457         ginfo->name = g_strdup(name);
 458         ginfo->first = first;
 459         ginfo->last = last;
 460         ginfo->type = type;
 461
 462         return ginfo;
 463 }
 464
 465 static void news_group_info_free(NewsGroupInfo *ginfo)
 466 {
 467         g_free(ginfo->name);
 468         g_free(ginfo);
 469 }
 470
 471 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 472                                     NewsGroupInfo *ginfo2)
 473 {
 474         return g_strcasecmp(ginfo1->name, ginfo2->name);
 475 }
 476
 477 GSList *news_get_group_list(Folder *folder)
 478 {
 479         gchar *path, *filename;
 480         FILE *fp;
 481         GSList *list = NULL;
 482         GSList *last = NULL;
 483         gchar buf[NNTPBUFSIZE];
 484
 485         g_return_val_if_fail(folder != NULL, NULL);
 486         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 487
 488         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 489         if (!is_dir_exist(path))
 490                 make_dir_hier(path);
 491         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 492         g_free(path);
 493
 494         if ((fp = fopen(filename, "rb")) == NULL) {
 495                 NNTPSession *session;
 496
 497                 session = news_session_get(folder);
 498                 if (!session) {
 499                         g_free(filename);
 500                         return NULL;
 501                 }
 502
 503                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 504                         g_free(filename);
 505                         statusbar_pop_all();
 506                         return NULL;
 507                 }
 508                 statusbar_pop_all();
 509                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 510                         log_warning(_("can't retrieve newsgroup list\n"));
 511                         session_destroy(SESSION(session));
 512                         REMOTE_FOLDER(folder)->session = NULL;
 513                         g_free(filename);
 514                         return NULL;
 515                 }
 516
 517                 if ((fp = fopen(filename, "rb")) == NULL) {
 518                         FILE_OP_ERROR(filename, "fopen");
 519                         g_free(filename);
 520                         return NULL;
 521                 }
 522         }
 523
 524         while (fgets(buf, sizeof(buf), fp) != NULL) {
 525                 gchar *p = buf;
 526                 gchar *name;
 527                 gint last_num;
 528                 gint first_num;
 529                 gchar type;
 530                 NewsGroupInfo *ginfo;
 531
 532                 p = strchr(p, ' ');
 533                 if (!p) continue;
 534                 *p = '\0';
 535                 p++;
 536                 name = buf;
 537
 538                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 539                         continue;
 540
 541                 ginfo = news_group_info_new(name, first_num, last_num, type);
 542
 543                 if (!last)
 544                         last = list = g_slist_append(NULL, ginfo);
 545                 else {
 546                         last = g_slist_append(last, ginfo);
 547                         last = last->next;
 548                 }
 549         }
 550
 551         fclose(fp);
 552         g_free(filename);
 553
 554         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 555
 556         statusbar_pop_all();
 557
 558         return list;
 559 }
 560
 561 void news_group_list_free(GSList *group_list)
 562 {
 563         GSList *cur;
 564
 565         if (!group_list) return;
 566
 567         for (cur = group_list; cur != NULL; cur = cur->next)
 568                 news_group_info_free((NewsGroupInfo *)cur->data);
 569         g_slist_free(group_list);
 570 }
 571
 572 void news_remove_group_list_cache(Folder *folder)
 573 {
 574         gchar *path, *filename;
 575
 576         g_return_if_fail(folder != NULL);
 577         g_return_if_fail(folder->type == F_NEWS);
 578
 579         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 580         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 581         g_free(path);
 582
 583         if (is_file_exist(filename)) {
 584                 if (remove(filename) < 0)
 585                         FILE_OP_ERROR(filename, "remove");
 586         }
 587         g_free(filename);
 588 }
 589
 590 gint news_post(Folder *folder, const gchar *file)
 591 {
 592         NNTPSession *session;
 593         FILE *fp;
 594         gint ok;
 595
 596         g_return_val_if_fail(folder != NULL, -1);
 597         g_return_val_if_fail(folder->type == F_NEWS, -1);
 598         g_return_val_if_fail(file != NULL, -1);
 599
 600         session = news_session_get(folder);
 601         if (!session) return -1;
 602
 603         if ((fp = fopen(file, "rb")) == NULL) {
 604                 FILE_OP_ERROR(file, "fopen");
 605                 return -1;
 606         }
 607
 608         ok = nntp_post(session->nntp_sock, fp);
 609         if (ok != NN_SUCCESS) {
 610                 log_warning(_("can't post article.\n"));
 611                 return -1;
 612         }
 613
 614         fclose(fp);
 615
 616         statusbar_pop_all();
 617
 618         return 0;
 619 }
 620
 621 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 622                                  gint num, gchar *filename)
 623 {
 624         gchar *msgid;
 625
 626         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 627             != NN_SUCCESS)
 628                 return -1;
 629
 630         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 631         g_free(msgid);
 632
 633         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 634                 log_warning(_("can't retrieve article %d\n"), num);
 635                 return -1;
 636         }
 637
 638         return 0;
 639 }
 640
 641 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 642 {
 643         gchar * dir;
 644         gint r;
 645
 646         dir = folder_item_get_path(item);
 647         printf("removing %d in %s\n",num,dir);
 648         r = remove_numbered_files(dir, num, num);
 649         g_free(dir);
 650
 651         return r;
 652 }
 653
 654 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 655 {
 656         return news_get_article_cmd(session, "ARTICLE", num, filename);
 657 }
 658
 659 /**
 660  * news_select_group:
 661  * @session: Active NNTP session.
 662  * @group: Newsgroup name.
 663  * @num: Estimated number of articles.
 664  * @first: First article number.
 665  * @last: Last article number.
 666  *
 667  * Select newsgroup @group with the GROUP command if it is not already
 668  * selected in @session, or article numbers need to be returned.
 669  *
 670  * Return value: NNTP result code.
 671  **/
 672 static gint news_select_group(NNTPSession *session, const gchar *group,
 673                               gint *num, gint *first, gint *last)
 674 {
 675         gint ok;
 676         gint num_, first_, last_;
 677
 678         if (!num || !first || !last) {
 679                 if (session->group && g_strcasecmp(session->group, group) == 0)
 680                         return NN_SUCCESS;
 681                 num = &num_;
 682                 first = &first_;
 683                 last = &last_;
 684         }
 685
 686         g_free(session->group);
 687         session->group = NULL;
 688
 689         ok = nntp_group(session->nntp_sock, group, num, first, last);
 690         if (ok == NN_SUCCESS)
 691                 session->group = g_strdup(group);
 692
 693         return ok;
 694 }
 695
 696 static GSList *news_get_uncached_articles(NNTPSession *session,
 697                                           FolderItem *item, gint cache_last,
 698                                           gint *rfirst, gint *rlast)
 699 {
 700         gint ok;
 701         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 702         gchar buf[NNTPBUFSIZE];
 703         GSList *newlist = NULL;
 704         GSList *llast = NULL;
 705         MsgInfo *msginfo;
 706
 707         if (rfirst) *rfirst = -1;
 708         if (rlast)  *rlast  = -1;
 709
 710         g_return_val_if_fail(session != NULL, NULL);
 711         g_return_val_if_fail(item != NULL, NULL);
 712         g_return_val_if_fail(item->folder != NULL, NULL);
 713         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 714
 715         ok = news_select_group(session, item->path, &num, &first, &last);
 716         if (ok != NN_SUCCESS) {
 717                 log_warning(_("can't set group: %s\n"), item->path);
 718                 return NULL;
 719         }
 720
 721         /* calculate getting overview range */
 722         if (first > last) {
 723                 log_warning(_("invalid article range: %d - %d\n"),
 724                             first, last);
 725                 return NULL;
 726         }
 727
 728         if (rfirst) *rfirst = first;
 729         if (rlast)  *rlast  = last;
 730
 731         if (cache_last < first)
 732                 begin = first;
 733         else if (last < cache_last)
 734                 begin = first;
 735         else if (last == cache_last) {
 736                 debug_print("no new articles.\n");
 737                 return NULL;
 738         } else
 739                 begin = cache_last + 1;
 740         end = last;
 741
 742         if (prefs_common.max_articles > 0 &&
 743             end - begin + 1 > prefs_common.max_articles)
 744                 begin = end - prefs_common.max_articles + 1;
 745
 746         log_message(_("getting xover %d - %d in %s...\n"),
 747                     begin, end, item->path);
 748         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 749                 log_warning(_("can't get xover\n"));
 750                 return NULL;
 751         }
 752
 753         for (;;) {
 754                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 755                         log_warning(_("error occurred while getting xover.\n"));
 756                         return newlist;
 757                 }
 758
 759                 if (buf[0] == '.' && buf[1] == '\r') break;
 760
 761                 msginfo = news_parse_xover(buf);
 762                 if (!msginfo) {
 763                         log_warning(_("invalid xover line: %s\n"), buf);
 764                         continue;
 765                 }
 766
 767                 msginfo->folder = item;
 768                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 769                 msginfo->flags.tmp_flags = MSG_NEWS;
 770                 msginfo->newsgroups = g_strdup(item->path);
 771
 772                 if (!newlist)
 773                         llast = newlist = g_slist_append(newlist, msginfo);
 774                 else {
 775                         llast = g_slist_append(llast, msginfo);
 776                         llast = llast->next;
 777                 }
 778         }
 779
 780         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 781                 log_warning(_("can't get xhdr\n"));
 782                 return newlist;
 783         }
 784
 785         llast = newlist;
 786
 787         for (;;) {
 788                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 789                         log_warning(_("error occurred while getting xhdr.\n"));
 790                         return newlist;
 791                 }
 792
 793                 if (buf[0] == '.' && buf[1] == '\r') break;
 794                 if (!llast) {
 795                         g_warning("llast == NULL\n");
 796                         continue;
 797                 }
 798
 799                 msginfo = (MsgInfo *)llast->data;
 800                 msginfo->to = news_parse_xhdr(buf, msginfo);
 801
 802                 llast = llast->next;
 803         }
 804
 805         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 806                 log_warning(_("can't get xhdr\n"));
 807                 return newlist;
 808         }
 809
 810         llast = newlist;
 811
 812         for (;;) {
 813                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 814                         log_warning(_("error occurred while getting xhdr.\n"));
 815                         return newlist;
 816                 }
 817
 818                 if (buf[0] == '.' && buf[1] == '\r') break;
 819                 if (!llast) {
 820                         g_warning("llast == NULL\n");
 821                         continue;
 822                 }
 823
 824                 msginfo = (MsgInfo *)llast->data;
 825                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 826
 827                 llast = llast->next;
 828         }
 829
 830         return newlist;
 831 }
 832
 833 #define PARSE_ONE_PARAM(p, srcp) \
 834 { \
 835         p = strchr(srcp, '\t'); \
 836         if (!p) return NULL; \
 837         else \
 838                 *p++ = '\0'; \
 839 }
 840
 841 static MsgInfo *news_parse_xover(const gchar *xover_str)
 842 {
 843         MsgInfo *msginfo;
 844         gchar buf[NNTPBUFSIZE];
 845         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 846         gchar *p;
 847         gint num, size_int, line_int;
 848         gchar *xover_buf;
 849
 850         Xstrdup_a(xover_buf, xover_str, return NULL);
 851
 852         PARSE_ONE_PARAM(subject, xover_buf);
 853         PARSE_ONE_PARAM(sender, subject);
 854         PARSE_ONE_PARAM(date, sender);
 855         PARSE_ONE_PARAM(msgid, date);
 856         PARSE_ONE_PARAM(ref, msgid);
 857         PARSE_ONE_PARAM(size, ref);
 858         PARSE_ONE_PARAM(line, size);
 859         PARSE_ONE_PARAM(xref, line);
 860
 861         tmp = strchr(xref, '\t');
 862         if (!tmp) tmp = strchr(line, '\r');
 863         if (!tmp) tmp = strchr(line, '\n');
 864         if (tmp) *tmp = '\0';
 865
 866         num = atoi(xover_str);
 867         size_int = atoi(size);
 868         line_int = atoi(line);
 869
 870         /* set MsgInfo */
 871         msginfo = procmsg_msginfo_new();
 872         msginfo->msgnum = num;
 873         msginfo->size = size_int;
 874
 875         msginfo->date = g_strdup(date);
 876         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 877
 878         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 879         msginfo->from = g_strdup(buf);
 880         msginfo->fromname = procheader_get_fromname(buf);
 881
 882         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 883         msginfo->subject = g_strdup(buf);
 884
 885         extract_parenthesis(msgid, '<', '>');
 886         remove_space(msgid);
 887         if (*msgid != '\0')
 888                 msginfo->msgid = g_strdup(msgid);
 889
 890         msginfo->references = g_strdup(ref);
 891         eliminate_parenthesis(ref, '(', ')');
 892         if ((p = strrchr(ref, '<')) != NULL) {
 893                 extract_parenthesis(p, '<', '>');
 894                 remove_space(p);
 895                 if (*p != '\0')
 896                         msginfo->inreplyto = g_strdup(p);
 897         }
 898
 899         msginfo->xref = g_strdup(xref);
 900         p = msginfo->xref+strlen(msginfo->xref) - 1;
 901         while (*p == '\r' || *p == '\n') {
 902                 *p = '\0';
 903                 p--;
 904         }
 905
 906         return msginfo;
 907 }
 908
 909 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 910 {
 911         gchar *p;
 912         gchar *tmp;
 913         gint num;
 914
 915         p = strchr(xhdr_str, ' ');
 916         if (!p)
 917                 return NULL;
 918         else
 919                 p++;
 920
 921         num = atoi(xhdr_str);
 922         if (msginfo->msgnum != num) return NULL;
 923
 924         tmp = strchr(p, '\r');
 925         if (!tmp) tmp = strchr(p, '\n');
 926
 927         if (tmp)
 928                 return g_strndup(p, tmp - p);
 929         else
 930                 return g_strdup(p);
 931 }
 932
 933 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 934                                         gint first)
 935 {
 936         GSList *cur, *next;
 937         MsgInfo *msginfo;
 938         gchar *dir;
 939
 940         g_return_val_if_fail(item != NULL, alist);
 941         g_return_val_if_fail(item->folder != NULL, alist);
 942         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 943
 944         if (first < 2) return alist;
 945
 946         debug_print("Deleting cached articles 1 - %d ...\n", first - 1);
 947
 948         dir = folder_item_get_path(item);
 949         remove_numbered_files(dir, 1, first - 1);
 950         g_free(dir);
 951
 952         for (cur = alist; cur != NULL; ) {
 953                 next = cur->next;
 954
 955                 msginfo = (MsgInfo *)cur->data;
 956                 if (msginfo && msginfo->msgnum < first) {
 957                         procmsg_msginfo_free(msginfo);
 958                         alist = g_slist_remove(alist, msginfo);
 959                 }
 960
 961                 cur = next;
 962         }
 963
 964         return alist;
 965 }
 966
 967 static void news_delete_all_articles(FolderItem *item)
 968 {
 969         gchar *dir;
 970
 971         g_return_if_fail(item != NULL);
 972         g_return_if_fail(item->folder != NULL);
 973         g_return_if_fail(item->folder->type == F_NEWS);
 974
 975         debug_print("Deleting all cached articles...\n");
 976
 977         dir = folder_item_get_path(item);
 978         remove_all_numbered_files(dir);
 979         g_free(dir);
 980 }
 981
 982 static void news_delete_expired_caches(GSList *alist, FolderItem *item)
 983 {
 984         gchar *dir;
 985
 986         g_return_if_fail(item != NULL);
 987         g_return_if_fail(item->folder != NULL);
 988         g_return_if_fail(item->folder->type == F_NEWS);
 989
 990         debug_print("Deleting expired cached articles...\n");
 991
 992         dir = folder_item_get_path(item);
 993         remove_expired_files(dir, 24 * 7);
 994         g_free(dir);
 995 }
 996
 997 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 998 {
 999         gchar * tmp;
1000         FILE * tmpfp;
1001         gchar buf[BUFFSIZE];
1002
1003         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
1004                               G_DIR_SEPARATOR, (gint)msginfo);
1005         if (tmp == NULL)
1006                 return -1;
1007
1008         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
1009                 FILE_OP_ERROR(tmp, "fopen");
1010                 return -1;
1011         }
1012         if (change_file_mode_rw(tmpfp, tmp) < 0) {
1013                 FILE_OP_ERROR(tmp, "chmod");
1014                 g_warning(_("can't change file mode\n"));
1015         }
1016
1017         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
1018         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
1019         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
1020         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
1021         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
1022         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
1023         get_rfc822_date(buf, sizeof(buf));
1024         fprintf(tmpfp, "Date: %s\r\n", buf);
1025         fprintf(tmpfp, "\r\n");
1026         fprintf(tmpfp, "removed with sylpheed\r\n");
1027
1028         fclose(tmpfp);
1029
1030         news_post(folder, tmp);
1031         remove(tmp);
1032
1033         g_free(tmp);
1034
1035         return 0;
1036 }
1037
1038 GSList *news_get_num_list(Folder *folder, FolderItem *item)
1039 {
1040         NNTPSession *session;
1041         gint i, ok, num, first, last;
1042         GSList *msgnum_list = NULL;
1043
1044         session = news_session_get(folder);
1045         g_return_val_if_fail(session != NULL, NULL);
1046         g_return_val_if_fail(item != NULL, NULL);
1047         g_return_val_if_fail(item->folder != NULL, NULL);
1048         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1049
1050         ok = news_select_group(session, item->path, &num, &first, &last);
1051         if (ok != NN_SUCCESS) {
1052                 log_warning(_("can't set group: %s\n"), item->path);
1053                 return NULL;
1054         }
1055
1056         if(last < first) {
1057                 log_warning(_("invalid article range: %d - %d\n"),
1058                             first, last);
1059                 return NULL;
1060         }
1061
1062         for(i = first; i <= last; i++) {
1063                 msgnum_list = g_slist_prepend(msgnum_list, GINT_TO_POINTER(i));
1064         }
1065
1066         return msgnum_list;
1067 }
1068
1069 #define READ_TO_LISTEND(hdr) \
1070         while (!(buf[0] == '.' && buf[1] == '\r')) { \
1071                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
1072                         log_warning(_("error occurred while getting %s.\n"), hdr); \
1073                         return msginfo; \
1074                 } \
1075         }
1076
1077 MsgInfo *news_fetch_msginfo(Folder *folder, FolderItem *item, gint num)
1078 {
1079         NNTPSession *session;
1080         MsgInfo *msginfo = NULL;
1081         gchar buf[NNTPBUFSIZE];
1082
1083         session = news_session_get(folder);
1084         g_return_val_if_fail(session != NULL, NULL);
1085         g_return_val_if_fail(item != NULL, NULL);
1086         g_return_val_if_fail(item->folder != NULL, NULL);
1087         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1088
1089         log_message(_("getting xover %d in %s...\n"),
1090                     num, item->path);
1091         if (nntp_xover(session->nntp_sock, num, num) != NN_SUCCESS) {
1092                 log_warning(_("can't get xover\n"));
1093                 return NULL;
1094         }
1095
1096         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1097                 log_warning(_("error occurred while getting xover.\n"));
1098                 return NULL;
1099         }
1100
1101         msginfo = news_parse_xover(buf);
1102         if (!msginfo) {
1103                 log_warning(_("invalid xover line: %s\n"), buf);
1104         }
1105
1106         READ_TO_LISTEND("xover");
1107
1108         if(!msginfo)
1109                 return NULL;
1110
1111         msginfo->folder = item;
1112         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1113         msginfo->flags.tmp_flags = MSG_NEWS;
1114         msginfo->newsgroups = g_strdup(item->path);
1115
1116         if (nntp_xhdr(session->nntp_sock, "to", num, num) != NN_SUCCESS) {
1117                 log_warning(_("can't get xhdr\n"));
1118                 return msginfo;
1119         }
1120
1121         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1122                 log_warning(_("error occurred while getting xhdr.\n"));
1123                 return msginfo;
1124         }
1125
1126         msginfo->to = news_parse_xhdr(buf, msginfo);
1127
1128         READ_TO_LISTEND("xhdr (to)");
1129
1130         if (nntp_xhdr(session->nntp_sock, "cc", num, num) != NN_SUCCESS) {
1131                 log_warning(_("can't get xhdr\n"));
1132                 return msginfo;
1133         }
1134
1135         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1136                 log_warning(_("error occurred while getting xhdr.\n"));
1137                 return msginfo;
1138         }
1139
1140         msginfo->cc = news_parse_xhdr(buf, msginfo);
1141
1142         READ_TO_LISTEND("xhdr (cc)");
1143
1144         return msginfo;
1145 }
1146
1147 static GSList *news_fetch_msginfo_from_to(NNTPSession *session, FolderItem *item, guint begin, guint end)
1148 {
1149         gchar buf[NNTPBUFSIZE];
1150         GSList *newlist = NULL;
1151         GSList *llast = NULL;
1152         MsgInfo *msginfo;
1153
1154         g_return_val_if_fail(session != NULL, NULL);
1155         g_return_val_if_fail(item != NULL, NULL);
1156
1157         log_message(_("getting xover %d - %d in %s...\n"),
1158                     begin, end, item->path);
1159         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
1160                 log_warning(_("can't get xover\n"));
1161                 return NULL;
1162         }
1163
1164         for (;;) {
1165                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1166                         log_warning(_("error occurred while getting xover.\n"));
1167                         return newlist;
1168                 }
1169
1170                 if (buf[0] == '.' && buf[1] == '\r') break;
1171
1172                 msginfo = news_parse_xover(buf);
1173                 if (!msginfo) {
1174                         log_warning(_("invalid xover line: %s\n"), buf);
1175                         continue;
1176                 }
1177
1178                 msginfo->folder = item;
1179                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1180                 msginfo->flags.tmp_flags = MSG_NEWS;
1181                 msginfo->newsgroups = g_strdup(item->path);
1182
1183                 if (!newlist)
1184                         llast = newlist = g_slist_append(newlist, msginfo);
1185                 else {
1186                         llast = g_slist_append(llast, msginfo);
1187                         llast = llast->next;
1188                 }
1189         }
1190
1191         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
1192                 log_warning(_("can't get xhdr\n"));
1193                 return newlist;
1194         }
1195
1196         llast = newlist;
1197
1198         for (;;) {
1199                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1200                         log_warning(_("error occurred while getting xhdr.\n"));
1201                         return newlist;
1202                 }
1203
1204                 if (buf[0] == '.' && buf[1] == '\r') break;
1205                 if (!llast) {
1206                         g_warning("llast == NULL\n");
1207                         continue;
1208                 }
1209
1210                 msginfo = (MsgInfo *)llast->data;
1211                 msginfo->to = news_parse_xhdr(buf, msginfo);
1212
1213                 llast = llast->next;
1214         }
1215
1216         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
1217                 log_warning(_("can't get xhdr\n"));
1218                 return newlist;
1219         }
1220
1221         llast = newlist;
1222
1223         for (;;) {
1224                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1225                         log_warning(_("error occurred while getting xhdr.\n"));
1226                         return newlist;
1227                 }
1228
1229                 if (buf[0] == '.' && buf[1] == '\r') break;
1230                 if (!llast) {
1231                         g_warning("llast == NULL\n");
1232                         continue;
1233                 }
1234
1235                 msginfo = (MsgInfo *)llast->data;
1236                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1237
1238                 llast = llast->next;
1239         }
1240
1241         return newlist;
1242 }
1243
1244 gint news_fetch_msgnum_sort(gconstpointer a, gconstpointer b)
1245 {
1246         return (GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b));
1247 }
1248
1249 GSList *news_fetch_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1250 {
1251         NNTPSession *session;
1252         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1253         guint first, last, next;
1254
1255         g_return_val_if_fail(folder != NULL, NULL);
1256         g_return_val_if_fail(folder->type == F_NEWS, NULL);
1257         g_return_val_if_fail(msgnum_list != NULL, NULL);
1258         g_return_val_if_fail(item != NULL, NULL);
1259
1260         session = news_session_get(folder);
1261         g_return_val_if_fail(session != NULL, NULL);
1262
1263         tmp_msgnum_list = g_slist_copy(msgnum_list);
1264         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, news_fetch_msgnum_sort);
1265
1266         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1267         last = first;
1268         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1269                 next = GPOINTER_TO_INT(elem->data);
1270                 if(next != (last + 1)) {
1271                         tmp_msginfo_list = news_fetch_msginfo_from_to(session, item, first, last);
1272                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1273                         first = next;
1274                 }
1275                 last = next;
1276         }
1277         tmp_msginfo_list = news_fetch_msginfo_from_to(session, item, first, last);
1278         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1279
1280         g_slist_free(tmp_msgnum_list);
1281
1282         return msginfo_list;
1283 }