src/news.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail team
   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 3 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, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #ifdef HAVE_LIBETPAN
  25
  26 #include "defs.h"
  27
  28 #include <glib.h>
  29 #include <glib/gi18n.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <dirent.h>
  34 #include <unistd.h>
  35 #include <time.h>
  36 #include <libetpan/libetpan.h>
  37
  38 #include "nntp-thread.h"
  39 #include "news.h"
  40 #include "news.h"
  41 #include "news_gtk.h"
  42 #include "socket.h"
  43 #include "recv.h"
  44 #include "procmsg.h"
  45 #include "procheader.h"
  46 #include "folder.h"
  47 #include "session.h"
  48 #include "statusbar.h"
  49 #include "codeconv.h"
  50 #include "utils.h"
  51 #include "prefs_common.h"
  52 #include "prefs_account.h"
  53 #include "inputdialog.h"
  54 #include "log.h"
  55 #include "progressindicator.h"
  56 #include "remotefolder.h"
  57 #include "alertpanel.h"
  58 #include "inc.h"
  59 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
  60 #  include "ssl.h"
  61 #endif
  62
  63 #define NNTP_PORT       119
  64 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
  65 #define NNTPS_PORT      563
  66 #endif
  67
  68 typedef struct _NewsFolder      NewsFolder;
  69 typedef struct _NewsSession     NewsSession;
  70
  71 #define NEWS_FOLDER(obj)        ((NewsFolder *)obj)
  72 #define NEWS_SESSION(obj)       ((NewsSession *)obj)
  73
  74 struct _NewsFolder
  75 {
  76         RemoteFolder rfolder;
  77
  78         gboolean use_auth;
  79         gboolean lock_count;
  80         guint refcnt;
  81 };
  82
  83 struct _NewsSession
  84 {
  85         Session session;
  86
  87         gchar *group;
  88 };
  89
  90 static void news_folder_init(Folder *folder, const gchar *name,
  91                              const gchar *path);
  92
  93 static Folder   *news_folder_new        (const gchar    *name,
  94                                          const gchar    *folder);
  95 static void      news_folder_destroy    (Folder         *folder);
  96
  97 static gchar *news_fetch_msg            (Folder         *folder,
  98                                          FolderItem     *item,
  99                                          gint            num);
 100 static void news_remove_cached_msg      (Folder         *folder,
 101                                          FolderItem     *item,
 102                                          MsgInfo        *msginfo);
 103 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 104 static Session *news_session_new         (Folder        *folder,
 105                                           const gchar   *server,
 106                                           gushort        port,
 107                                           const gchar   *userid,
 108                                           const gchar   *passwd,
 109                                           SSLType        ssl_type);
 110 #else
 111 static Session *news_session_new         (Folder        *folder,
 112                                           const gchar   *server,
 113                                           gushort        port,
 114                                           const gchar   *userid,
 115                                           const gchar   *passwd);
 116 #endif
 117
 118 static gint news_get_article             (Folder        *folder,
 119                                           gint           num,
 120                                           gchar         *filename);
 121
 122 static gint news_select_group            (Folder        *folder,
 123                                           const gchar   *group,
 124                                           gint          *num,
 125                                           gint          *first,
 126                                           gint          *last);
 127 static MsgInfo *news_parse_xover         (struct newsnntp_xover_resp_item *item);
 128 static gchar *news_parse_xhdr            (clist         *list,
 129                                           MsgInfo       *msginfo);
 130 static gint news_get_num_list                    (Folder        *folder,
 131                                           FolderItem    *item,
 132                                           GSList       **list,
 133                                           gboolean      *old_uids_valid);
 134 static MsgInfo *news_get_msginfo                 (Folder        *folder,
 135                                           FolderItem    *item,
 136                                           gint           num);
 137 static GSList *news_get_msginfos                 (Folder        *folder,
 138                                           FolderItem    *item,
 139                                           GSList        *msgnum_list);
 140 static gboolean news_scan_required               (Folder        *folder,
 141                                           FolderItem    *item);
 142
 143 static gchar *news_folder_get_path       (Folder        *folder);
 144 static gchar *news_item_get_path                 (Folder        *folder,
 145                                           FolderItem    *item);
 146 static void news_synchronise             (FolderItem    *item, gint days);
 147 static int news_remove_msg               (Folder        *folder,
 148                                           FolderItem    *item,
 149                                           gint           msgnum);
 150 static gint news_remove_folder           (Folder        *folder,
 151                                           FolderItem    *item);
 152 static FolderClass news_class;
 153
 154 FolderClass *news_get_class(void)
 155 {
 156         if (news_class.idstr == NULL) {
 157                 news_class.type = F_NEWS;
 158                 news_class.idstr = "news";
 159                 news_class.uistr = "News";
 160
 161                 /* Folder functions */
 162                 news_class.new_folder = news_folder_new;
 163                 news_class.destroy_folder = news_folder_destroy;
 164
 165                 /* FolderItem functions */
 166                 news_class.item_get_path = news_item_get_path;
 167                 news_class.get_num_list = news_get_num_list;
 168                 news_class.scan_required = news_scan_required;
 169                 news_class.remove_folder = news_remove_folder;
 170
 171                 /* Message functions */
 172                 news_class.get_msginfo = news_get_msginfo;
 173                 news_class.get_msginfos = news_get_msginfos;
 174                 news_class.fetch_msg = news_fetch_msg;
 175                 news_class.synchronise = news_synchronise;
 176                 news_class.remove_msg = news_remove_msg;
 177                 news_class.remove_cached_msg = news_remove_cached_msg;
 178         };
 179
 180         return &news_class;
 181 }
 182
 183 guint nntp_folder_get_refcnt(Folder *folder)
 184 {
 185         return ((NewsFolder *)folder)->refcnt;
 186 }
 187
 188 void nntp_folder_ref(Folder *folder)
 189 {
 190         ((NewsFolder *)folder)->refcnt++;
 191 }
 192
 193 void nntp_folder_unref(Folder *folder)
 194 {
 195         if (((NewsFolder *)folder)->refcnt > 0)
 196                 ((NewsFolder *)folder)->refcnt--;
 197 }
 198
 199 static int news_remove_msg               (Folder        *folder,
 200                                           FolderItem    *item,
 201                                           gint           msgnum)
 202 {
 203         gchar *path, *filename;
 204
 205         g_return_val_if_fail(folder != NULL, -1);
 206         g_return_val_if_fail(item != NULL, -1);
 207
 208         path = folder_item_get_path(item);
 209         if (!is_dir_exist(path))
 210                 make_dir_hier(path);
 211
 212         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msgnum), NULL);
 213         g_free(path);
 214         g_unlink(filename);
 215         g_free(filename);
 216         return 0;
 217 }
 218
 219 static void news_folder_lock(NewsFolder *folder)
 220 {
 221         folder->lock_count++;
 222 }
 223
 224 static void news_folder_unlock(NewsFolder *folder)
 225 {
 226         if (folder->lock_count > 0)
 227                 folder->lock_count--;
 228 }
 229
 230 int news_folder_locked(Folder *folder)
 231 {
 232         if (folder == NULL)
 233                 return 0;
 234
 235         return NEWS_FOLDER(folder)->lock_count;
 236 }
 237
 238 static Folder *news_folder_new(const gchar *name, const gchar *path)
 239 {
 240         Folder *folder;
 241
 242         folder = (Folder *)g_new0(NewsFolder, 1);
 243         folder->klass = &news_class;
 244         news_folder_init(folder, name, path);
 245
 246         return folder;
 247 }
 248
 249 static void news_folder_destroy(Folder *folder)
 250 {
 251         gchar *dir;
 252
 253         while (nntp_folder_get_refcnt(folder) > 0)
 254                 gtk_main_iteration();
 255
 256         dir = news_folder_get_path(folder);
 257         if (is_dir_exist(dir))
 258                 remove_dir_recursive(dir);
 259         g_free(dir);
 260
 261         nntp_done(folder);
 262         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 263 }
 264
 265 static void news_folder_init(Folder *folder, const gchar *name,
 266                              const gchar *path)
 267 {
 268         folder_remote_folder_init(folder, name, path);
 269 }
 270
 271 static void news_session_destroy(Session *session)
 272 {
 273         NewsSession *news_session = NEWS_SESSION(session);
 274
 275         g_return_if_fail(session != NULL);
 276
 277         if (news_session->group)
 278                 g_free(news_session->group);
 279 }
 280
 281 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 282 static Session *news_session_new(Folder *folder, const gchar *server, gushort port,
 283                                  const gchar *userid, const gchar *passwd,
 284                                  SSLType ssl_type)
 285 #else
 286 static Session *news_session_new(Folder *folder, const gchar *server, gushort port,
 287                                  const gchar *userid, const gchar *passwd)
 288 #endif
 289 {
 290         NewsSession *session;
 291         int r = 0;
 292         g_return_val_if_fail(server != NULL, NULL);
 293
 294         log_message(LOG_PROTOCOL, _("creating NNTP connection to %s:%d ...\n"), server, port);
 295
 296         session = g_new0(NewsSession, 1);
 297         session_init(SESSION(session));
 298         SESSION(session)->type             = SESSION_NEWS;
 299         SESSION(session)->server           = g_strdup(server);
 300         SESSION(session)->sock             = NULL;
 301         SESSION(session)->destroy          = news_session_destroy;
 302
 303         nntp_init(folder);
 304
 305 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 306         if (ssl_type != SSL_NONE)
 307                 r = nntp_threaded_connect_ssl(folder, server, port);
 308         else
 309 #endif
 310                 r = nntp_threaded_connect(folder, server, port);
 311
 312         if (r != NEWSNNTP_NO_ERROR) {
 313                 log_error(LOG_PROTOCOL, _("Error logging in to %s:%d ...\n"), server, port);
 314                 session_destroy(SESSION(session));
 315                 return NULL;
 316         }
 317
 318         return SESSION(session);
 319 }
 320
 321 static Session *news_session_new_for_folder(Folder *folder)
 322 {
 323         Session *session;
 324         PrefsAccount *ac;
 325         const gchar *userid = NULL;
 326         gchar *passwd = NULL;
 327         gushort port;
 328
 329         g_return_val_if_fail(folder != NULL, NULL);
 330         g_return_val_if_fail(folder->account != NULL, NULL);
 331
 332         ac = folder->account;
 333         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 334                 userid = ac->userid;
 335                 if (ac->passwd && ac->passwd[0])
 336                         passwd = g_strdup(ac->passwd);
 337                 else
 338                         passwd = input_dialog_query_password(ac->nntp_server,
 339                                                              userid);
 340         }
 341
 342 #if (defined(USE_OPENSSL) || defined (USE_GNUTLS))
 343         port = ac->set_nntpport ? ac->nntpport
 344                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 345         session = news_session_new(folder, ac->nntp_server, port, userid, passwd,
 346                                    ac->ssl_nntp);
 347 #else
 348         if (ac->ssl_nntp != SSL_NONE) {
 349                 if (alertpanel_full(_("Insecure connection"),
 350                         _("This connection is configured to be secured "
 351                           "using SSL, but SSL is not available in this "
 352                           "build of Claws Mail. \n\n"
 353                           "Do you want to continue connecting to this "
 354                           "server? The communication would not be "
 355                           "secure."),
 356                           GTK_STOCK_CANCEL, _("Con_tinue connecting"),
 357                           NULL, FALSE, NULL, ALERT_WARNING,
 358                           G_ALERTDEFAULT) != G_ALERTALTERNATE)
 359                         return NULL;
 360         }
 361         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 362         session = news_session_new(folder, ac->nntp_server, port, userid, passwd);
 363 #endif
 364
 365         if ((session != NULL) && ac->use_nntp_auth) { /* FIXME:  && ac->use_nntp_auth_onconnect */
 366                 if (nntp_threaded_login(folder, userid, passwd) !=
 367                         NEWSNNTP_NO_ERROR) {
 368                         log_error(LOG_PROTOCOL, _("Error authenticating to %s:%d ...\n"), ac->nntp_server, port);
 369                         session_destroy(SESSION(session));
 370                         g_free(passwd);
 371                         return NULL;
 372                 }
 373         }
 374         g_free(passwd);
 375
 376         return session;
 377 }
 378
 379 static NewsSession *news_session_get(Folder *folder)
 380 {
 381         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 382         struct tm lt;
 383         int r;
 384
 385         g_return_val_if_fail(folder != NULL, NULL);
 386         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 387         g_return_val_if_fail(folder->account != NULL, NULL);
 388
 389         if (prefs_common.work_offline &&
 390             !inc_offline_should_override(FALSE,
 391                 _("Claws Mail needs network access in order "
 392                   "to access the News server."))) {
 393                 return NULL;
 394         }
 395
 396         if (!rfolder->session) {
 397                 rfolder->session = news_session_new_for_folder(folder);
 398                 return NEWS_SESSION(rfolder->session);
 399         }
 400
 401         if (time(NULL) - rfolder->session->last_access_time <
 402                 SESSION_TIMEOUT_INTERVAL) {
 403                 return NEWS_SESSION(rfolder->session);
 404         }
 405
 406         if ((r = nntp_threaded_date(folder, &lt)) != NEWSNNTP_NO_ERROR) {
 407                 if (r != NEWSNNTP_ERROR_COMMAND_NOT_SUPPORTED &&
 408                     r != NEWSNNTP_ERROR_COMMAND_NOT_UNDERSTOOD) {
 409                         log_warning(LOG_PROTOCOL, _("NNTP connection to %s:%d has been"
 410                               " disconnected. Reconnecting...\n"),
 411                             folder->account->nntp_server,
 412                             folder->account->set_nntpport ?
 413                             folder->account->nntpport : NNTP_PORT);
 414                         session_destroy(rfolder->session);
 415                         rfolder->session = news_session_new_for_folder(folder);
 416                 }
 417         }
 418
 419         if (rfolder->session)
 420                 session_set_access_time(rfolder->session);
 421
 422         return NEWS_SESSION(rfolder->session);
 423 }
 424
 425 static void news_remove_cached_msg(Folder *folder, FolderItem *item, MsgInfo *msginfo)
 426 {
 427         gchar *path, *filename;
 428
 429         path = folder_item_get_path(item);
 430
 431         if (!is_dir_exist(path)) {
 432                 g_free(path);
 433                 return;
 434         }
 435
 436         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(msginfo->msgnum), NULL);
 437         g_free(path);
 438
 439         if (is_file_exist(filename)) {
 440                 g_unlink(filename);
 441         }
 442         g_free(filename);
 443 }
 444
 445 static gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 446 {
 447         gchar *path, *filename;
 448         NewsSession *session;
 449         gint ok;
 450
 451         g_return_val_if_fail(folder != NULL, NULL);
 452         g_return_val_if_fail(item != NULL, NULL);
 453
 454         path = folder_item_get_path(item);
 455         if (!is_dir_exist(path))
 456                 make_dir_hier(path);
 457         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 458         g_free(path);
 459
 460         if (is_file_exist(filename)) {
 461                 debug_print("article %d has been already cached.\n", num);
 462                 return filename;
 463         }
 464
 465         session = news_session_get(folder);
 466         if (!session) {
 467                 g_free(filename);
 468                 return NULL;
 469         }
 470
 471         ok = news_select_group(folder, item->path, NULL, NULL, NULL);
 472         if (ok != NEWSNNTP_NO_ERROR) {
 473                 if (ok == NEWSNNTP_ERROR_STREAM) {
 474                         session_destroy(SESSION(session));
 475                         REMOTE_FOLDER(folder)->session = NULL;
 476                 }
 477                 g_free(filename);
 478                 return NULL;
 479         }
 480
 481         debug_print("getting article %d...\n", num);
 482         ok = news_get_article(folder,
 483                               num, filename);
 484         if (ok != NEWSNNTP_NO_ERROR) {
 485                 g_warning("can't read article %d\n", num);
 486                 if (ok == NEWSNNTP_ERROR_STREAM) {
 487                         session_destroy(SESSION(session));
 488                         REMOTE_FOLDER(folder)->session = NULL;
 489                 }
 490                 g_free(filename);
 491                 return NULL;
 492         }
 493         GTK_EVENTS_FLUSH();
 494         return filename;
 495 }
 496
 497 static NewsGroupInfo *news_group_info_new(const gchar *name,
 498                                           gint first, gint last, gchar type)
 499 {
 500         NewsGroupInfo *ginfo;
 501
 502         ginfo = g_new(NewsGroupInfo, 1);
 503         ginfo->name = g_strdup(name);
 504         ginfo->first = first;
 505         ginfo->last = last;
 506         ginfo->type = type;
 507
 508         return ginfo;
 509 }
 510
 511 static void news_group_info_free(NewsGroupInfo *ginfo)
 512 {
 513         g_free(ginfo->name);
 514         g_free(ginfo);
 515 }
 516
 517 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 518                                     NewsGroupInfo *ginfo2)
 519 {
 520         return g_ascii_strcasecmp(ginfo1->name, ginfo2->name);
 521 }
 522
 523 GSList *news_get_group_list(Folder *folder)
 524 {
 525         gchar *path, *filename;
 526         FILE *fp;
 527         GSList *list = NULL;
 528         GSList *last = NULL;
 529         gchar buf[BUFFSIZE];
 530
 531         g_return_val_if_fail(folder != NULL, NULL);
 532         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 533
 534         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 535         if (!is_dir_exist(path))
 536                 make_dir_hier(path);
 537         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 538         g_free(path);
 539
 540         if ((fp = g_fopen(filename, "rb")) == NULL) {
 541                 NewsSession *session;
 542                 gint ok;
 543                 clist *grouplist = NULL;
 544                 clistiter *cur;
 545                 fp = fopen(filename, "wb");
 546
 547                 if (!fp) {
 548                         g_free(filename);
 549                         return NULL;
 550                 }
 551                 session = news_session_get(folder);
 552                 if (!session) {
 553                         fclose(fp);
 554                         g_free(filename);
 555                         return NULL;
 556                 }
 557
 558                 ok = nntp_threaded_list(folder, &grouplist);
 559
 560                 if (ok != NEWSNNTP_NO_ERROR) {
 561                         if (ok == NEWSNNTP_ERROR_STREAM) {
 562                                 session_destroy(SESSION(session));
 563                                 REMOTE_FOLDER(folder)->session = NULL;
 564                         }
 565                         fclose(fp);
 566                         g_free(filename);
 567                         return NULL;
 568                 }
 569
 570                 for (cur = clist_begin(grouplist); cur; cur = clist_next(cur)) {
 571                         struct newsnntp_group_info *info = (struct newsnntp_group_info *)
 572                                                                 clist_content(cur);
 573                         if (fprintf(fp, "%s %d %d %c\n",
 574                                 info->grp_name,
 575                                 info->grp_last,
 576                                 info->grp_first,
 577                                 info->grp_type) < 0) {
 578                                 log_error(LOG_PROTOCOL, ("Can't write newsgroup list\n"));
 579                                 session_destroy(SESSION(session));
 580                                 REMOTE_FOLDER(folder)->session = NULL;
 581                                 fclose(fp);
 582                                 g_free(filename);
 583                                 newsnntp_list_free(grouplist);
 584                                 return NULL;
 585                         }
 586                 }
 587                 newsnntp_list_free(grouplist);
 588
 589                 if (fclose(fp) == EOF) {
 590                         log_error(LOG_PROTOCOL, ("Can't write newsgroup list\n"));
 591                         session_destroy(SESSION(session));
 592                         REMOTE_FOLDER(folder)->session = NULL;
 593                         g_free(filename);
 594                         return NULL;
 595                 }
 596
 597                 if ((fp = g_fopen(filename, "rb")) == NULL) {
 598                         FILE_OP_ERROR(filename, "fopen");
 599                         g_free(filename);
 600                         return NULL;
 601                 }
 602         }
 603
 604         while (fgets(buf, sizeof(buf), fp) != NULL) {
 605                 gchar *p = buf;
 606                 gchar *name;
 607                 gint last_num;
 608                 gint first_num;
 609                 gchar type;
 610                 NewsGroupInfo *ginfo;
 611
 612                 p = strchr(p, ' ');
 613                 if (!p) continue;
 614                 *p = '\0';
 615                 p++;
 616                 name = buf;
 617
 618                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 619                         continue;
 620
 621                 ginfo = news_group_info_new(name, first_num, last_num, type);
 622
 623                 if (!last)
 624                         last = list = g_slist_append(NULL, ginfo);
 625                 else {
 626                         last = g_slist_append(last, ginfo);
 627                         last = last->next;
 628                 }
 629         }
 630
 631         fclose(fp);
 632         g_free(filename);
 633
 634         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 635
 636         return list;
 637 }
 638
 639 void news_group_list_free(GSList *group_list)
 640 {
 641         GSList *cur;
 642
 643         if (!group_list) return;
 644
 645         for (cur = group_list; cur != NULL; cur = cur->next)
 646                 news_group_info_free((NewsGroupInfo *)cur->data);
 647         g_slist_free(group_list);
 648 }
 649
 650 void news_remove_group_list_cache(Folder *folder)
 651 {
 652         gchar *path, *filename;
 653
 654         g_return_if_fail(folder != NULL);
 655         g_return_if_fail(FOLDER_CLASS(folder) == &news_class);
 656
 657         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 658         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 659         g_free(path);
 660
 661         if (is_file_exist(filename)) {
 662                 if (remove(filename) < 0)
 663                         FILE_OP_ERROR(filename, "remove");
 664         }
 665         g_free(filename);
 666 }
 667
 668 gint news_post(Folder *folder, const gchar *file)
 669 {
 670         gint ok;
 671         char *contents = file_read_to_str(file);
 672         NewsSession *session;
 673
 674         g_return_val_if_fail(folder != NULL, -1);
 675         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 676         g_return_val_if_fail(contents != NULL, -1);
 677
 678         session = news_session_get(folder);
 679         if (!session)  {
 680                 g_free(contents);
 681                 return -1;
 682         }
 683
 684         ok = nntp_threaded_post(folder, contents, strlen(contents));
 685
 686         g_free(contents);
 687         if (ok == NEWSNNTP_ERROR_STREAM) {
 688                 session_destroy(SESSION(session));
 689                 REMOTE_FOLDER(folder)->session = NULL;
 690         }
 691
 692         return ok;
 693 }
 694
 695 static gint news_get_article(Folder *folder, gint num, gchar *filename)
 696 {
 697         size_t len;
 698         char *result = NULL;
 699         int r;
 700
 701         r = nntp_threaded_article(folder, num, &result, &len);
 702
 703         if (r == NEWSNNTP_NO_ERROR) {
 704                 if (str_write_to_file(result, filename) < 0)
 705                         return -1;
 706         }
 707
 708         g_free(result);
 709         return r;
 710 }
 711
 712 /**
 713  * news_select_group:
 714  * @session: Active NNTP session.
 715  * @group: Newsgroup name.
 716  * @num: Estimated number of articles.
 717  * @first: First article number.
 718  * @last: Last article number.
 719  *
 720  * Select newsgroup @group with the GROUP command if it is not already
 721  * selected in @session, or article numbers need to be returned.
 722  *
 723  * Return value: NNTP result code.
 724  **/
 725 static gint news_select_group(Folder *folder, const gchar *group,
 726                               gint *num, gint *first, gint *last)
 727 {
 728         gint ok;
 729         gint num_, first_, last_;
 730         struct newsnntp_group_info *info = NULL;
 731         NewsSession *session = NEWS_SESSION(news_session_get(folder));
 732
 733         g_return_val_if_fail(session != NULL, -1);
 734
 735         if (!num || !first || !last) {
 736                 if (session->group && g_ascii_strcasecmp(session->group, group) == 0)
 737                         return NEWSNNTP_NO_ERROR;
 738                 num = &num_;
 739                 first = &first_;
 740                 last = &last_;
 741         }
 742
 743         g_free(session->group);
 744         session->group = NULL;
 745
 746         ok = nntp_threaded_group(folder, group, &info);
 747
 748         if (ok != NEWSNNTP_NO_ERROR &&
 749             ok != NEWSNNTP_ERROR_STREAM &&
 750             ok != NEWSNNTP_WARNING_REQUEST_AUTHORIZATION_USERNAME) {
 751                 ok = nntp_threaded_mode_reader(folder);
 752                 if (ok == NEWSNNTP_NO_ERROR)
 753                         ok = nntp_threaded_group(folder, group, &info);
 754         }
 755
 756         if (ok == NEWSNNTP_NO_ERROR && info) {
 757                 session->group = g_strdup(group);
 758                 *num = info->grp_first;
 759                 *first = info->grp_first;
 760                 *last = info->grp_last;
 761                 newsnntp_group_free(info);
 762         } else {
 763                 log_warning(LOG_PROTOCOL, _("couldn't select group: %s\n"), group);
 764         }
 765         return ok;
 766 }
 767
 768 static MsgInfo *news_parse_xover(struct newsnntp_xover_resp_item *item)
 769 {
 770         MsgInfo *msginfo;
 771
 772         /* set MsgInfo */
 773         msginfo = procmsg_msginfo_new();
 774         msginfo->msgnum = item->ovr_article;
 775         msginfo->size = item->ovr_size;
 776
 777         msginfo->date = g_strdup(item->ovr_date);
 778         msginfo->date_t = procheader_date_parse(NULL, item->ovr_date, 0);
 779
 780         msginfo->from = conv_unmime_header(item->ovr_author, NULL);
 781         msginfo->fromname = procheader_get_fromname(msginfo->from);
 782
 783         msginfo->subject = conv_unmime_header(item->ovr_subject, NULL);
 784
 785         remove_return(msginfo->from);
 786         remove_return(msginfo->fromname);
 787         remove_return(msginfo->subject);
 788
 789         if (item->ovr_message_id) {
 790                 gchar *tmp = g_strdup(item->ovr_message_id);
 791                 extract_parenthesis(tmp, '<', '>');
 792                 remove_space(tmp);
 793                 if (*tmp != '\0')
 794                         msginfo->msgid = g_strdup(tmp);
 795                 g_free(tmp);
 796         }
 797
 798         /* FIXME: this is a quick fix; references' meaning was changed
 799          * into having the actual list of references in the References: header.
 800          * We need a GSList here, so msginfo_free() and msginfo_copy() can do
 801          * their things properly. */
 802         if (item->ovr_references && *(item->ovr_references)) {
 803                 gchar **ref_tokens = g_strsplit(item->ovr_references, " ", -1);
 804                 guint i = 0;
 805                 char *tmp;
 806                 char *p;
 807                 while (ref_tokens[i]) {
 808                         gchar *cur_ref = ref_tokens[i];
 809                         msginfo->references = references_list_append(msginfo->references,
 810                                         cur_ref);
 811                         i++;
 812                 }
 813                 g_strfreev(ref_tokens);
 814
 815                 tmp = g_strdup(item->ovr_references);
 816                 eliminate_parenthesis(tmp, '(', ')');
 817                 if ((p = strrchr(tmp, '<')) != NULL) {
 818                         extract_parenthesis(p, '<', '>');
 819                         remove_space(p);
 820                         if (*p != '\0')
 821                                 msginfo->inreplyto = g_strdup(p);
 822                 }
 823                 g_free(tmp);
 824         }
 825
 826         return msginfo;
 827 }
 828
 829 static gchar *news_parse_xhdr(clist *hdrlist, MsgInfo *msginfo)
 830 {
 831         struct newsnntp_xhdr_resp_item *hdr;
 832
 833         hdr = clist_content(clist_begin(hdrlist));
 834         if (hdr->hdr_article != msginfo->msgnum)
 835                 return NULL;
 836         return g_strdup(hdr->hdr_value);
 837 }
 838
 839 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 840 {
 841         gchar * tmp;
 842         FILE * tmpfp;
 843         gchar buf[BUFFSIZE];
 844
 845         tmp = g_strdup_printf("%s%ccancel%p", get_tmp_dir(),
 846                               G_DIR_SEPARATOR, msginfo);
 847         if (tmp == NULL)
 848                 return -1;
 849
 850         if ((tmpfp = g_fopen(tmp, "wb")) == NULL) {
 851                 FILE_OP_ERROR(tmp, "fopen");
 852                 return -1;
 853         }
 854         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 855                 FILE_OP_ERROR(tmp, "chmod");
 856                 g_warning("can't change file mode\n");
 857         }
 858
 859         get_rfc822_date(buf, sizeof(buf));
 860         if (fprintf(tmpfp, "From: %s\r\n"
 861                        "Newsgroups: %s\r\n"
 862                        "Subject: cmsg cancel <%s>\r\n"
 863                        "Control: cancel <%s>\r\n"
 864                        "Approved: %s\r\n"
 865                        "X-Cancelled-by: %s\r\n"
 866                        "Date: %s\r\n"
 867                        "\r\n"
 868                        "removed with Claws Mail\r\n",
 869                        msginfo->from,
 870                        msginfo->newsgroups,
 871                        msginfo->msgid,
 872                        msginfo->msgid,
 873                        msginfo->from,
 874                        msginfo->from,
 875                        buf) < 0) {
 876                 FILE_OP_ERROR(tmp, "fprintf");
 877                 fclose(tmpfp);
 878                 g_unlink(tmp);
 879                 g_free(tmp);
 880                 return -1;
 881         }
 882
 883         if (fclose(tmpfp) == EOF) {
 884                 FILE_OP_ERROR(tmp, "fclose");
 885                 g_unlink(tmp);
 886                 g_free(tmp);
 887                 return -1;
 888         }
 889
 890         news_post(folder, tmp);
 891         remove(tmp);
 892
 893         g_free(tmp);
 894
 895         return 0;
 896 }
 897
 898 static gchar *news_folder_get_path(Folder *folder)
 899 {
 900         gchar *folder_path;
 901
 902         g_return_val_if_fail(folder->account != NULL, NULL);
 903
 904         folder_path = g_strconcat(get_news_cache_dir(),
 905                                   G_DIR_SEPARATOR_S,
 906                                   folder->account->nntp_server,
 907                                   NULL);
 908         return folder_path;
 909 }
 910
 911 static gchar *news_item_get_path(Folder *folder, FolderItem *item)
 912 {
 913         gchar *folder_path, *path;
 914
 915         g_return_val_if_fail(folder != NULL, NULL);
 916         g_return_val_if_fail(item != NULL, NULL);
 917         folder_path = news_folder_get_path(folder);
 918
 919         g_return_val_if_fail(folder_path != NULL, NULL);
 920         if (folder_path[0] == G_DIR_SEPARATOR) {
 921                 if (item->path)
 922                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
 923                                            item->path, NULL);
 924                 else
 925                         path = g_strdup(folder_path);
 926         } else {
 927                 if (item->path)
 928                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 929                                            folder_path, G_DIR_SEPARATOR_S,
 930                                            item->path, NULL);
 931                 else
 932                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 933                                            folder_path, NULL);
 934         }
 935         g_free(folder_path);
 936
 937         return path;
 938 }
 939
 940 static gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list, gboolean *old_uids_valid)
 941 {
 942         NewsSession *session;
 943         gint i, ok, num, first, last, nummsgs = 0;
 944         gchar *dir;
 945
 946         g_return_val_if_fail(item != NULL, -1);
 947         g_return_val_if_fail(item->folder != NULL, -1);
 948         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 949
 950         session = news_session_get(folder);
 951         g_return_val_if_fail(session != NULL, -1);
 952
 953         *old_uids_valid = TRUE;
 954
 955         news_folder_lock(NEWS_FOLDER(item->folder));
 956
 957         ok = news_select_group(folder, item->path, &num, &first, &last);
 958         if (ok != NEWSNNTP_NO_ERROR) {
 959                 log_warning(LOG_PROTOCOL, _("couldn't set group: %s\n"), item->path);
 960                 news_folder_unlock(NEWS_FOLDER(item->folder));
 961                 return -1;
 962         }
 963
 964         dir = news_folder_get_path(folder);
 965         if (num <= 0)
 966                 remove_all_numbered_files(dir);
 967         else if (last < first)
 968                 log_warning(LOG_PROTOCOL, _("invalid article range: %d - %d\n"),
 969                             first, last);
 970         else {
 971                 for (i = first; i <= last; i++) {
 972                         *msgnum_list = g_slist_prepend(*msgnum_list,
 973                                                        GINT_TO_POINTER(i));
 974                         nummsgs++;
 975                 }
 976                 debug_print("removing old messages from %d to %d in %s\n",
 977                             first, last, dir);
 978                 remove_numbered_files(dir, 1, first - 1);
 979         }
 980         g_free(dir);
 981         news_folder_unlock(NEWS_FOLDER(item->folder));
 982         return nummsgs;
 983 }
 984
 985 static void news_set_msg_flags(FolderItem *item, MsgInfo *msginfo)
 986 {
 987         msginfo->flags.tmp_flags = 0;
 988         if (item->folder->account->mark_crosspost_read && msginfo->msgid) {
 989                 if (item->folder->newsart &&
 990                     g_hash_table_lookup(item->folder->newsart, msginfo->msgid) != NULL) {
 991                         msginfo->flags.perm_flags = MSG_COLORLABEL_TO_FLAGS(item->folder->account->crosspost_col);
 992
 993                 } else {
 994                         if (!item->folder->newsart)
 995                                 item->folder->newsart = g_hash_table_new(g_str_hash, g_str_equal);
 996                         g_hash_table_insert(item->folder->newsart,
 997                                         g_strdup(msginfo->msgid), GINT_TO_POINTER(1));
 998                         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 999                 }
1000         } else {
1001                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1002         }
1003 }
1004
1005 static MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
1006 {
1007         NewsSession *session;
1008         MsgInfo *msginfo = NULL;
1009         gint ok;
1010         struct newsnntp_xover_resp_item *result = NULL;
1011         clist *hdrlist = NULL;
1012
1013         session = news_session_get(folder);
1014         g_return_val_if_fail(session != NULL, NULL);
1015         g_return_val_if_fail(item != NULL, NULL);
1016         g_return_val_if_fail(item->folder != NULL, NULL);
1017         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &news_class, NULL);
1018
1019         log_message(LOG_PROTOCOL, _("getting xover %d in %s...\n"),
1020                     num, item->path);
1021         news_folder_lock(NEWS_FOLDER(item->folder));
1022
1023         ok = nntp_threaded_xover(folder, num, num, &result, NULL);
1024         if (ok != NEWSNNTP_NO_ERROR) {
1025                 log_warning(LOG_PROTOCOL, _("couldn't get xover\n"));
1026                 if (ok == NEWSNNTP_ERROR_STREAM) {
1027                         session_destroy(SESSION(session));
1028                         REMOTE_FOLDER(item->folder)->session = NULL;
1029                 }
1030                 news_folder_unlock(NEWS_FOLDER(item->folder));
1031                 return NULL;
1032         }
1033
1034         msginfo = news_parse_xover(result);
1035         xover_resp_item_free(result);
1036         if (!msginfo) {
1037                 log_warning(LOG_PROTOCOL, _("invalid xover line\n"));
1038         }
1039
1040         if(!msginfo) {
1041                 news_folder_unlock(NEWS_FOLDER(item->folder));
1042                 return NULL;
1043         }
1044
1045         msginfo->folder = item;
1046
1047         news_set_msg_flags(item, msginfo);
1048         msginfo->flags.tmp_flags |= MSG_NEWS;
1049         msginfo->newsgroups = g_strdup(item->path);
1050
1051         ok = nntp_threaded_xhdr(folder, "to", num, num, &hdrlist);
1052
1053         if (ok != NEWSNNTP_NO_ERROR) {
1054                 log_warning(LOG_PROTOCOL, _("couldn't get xhdr\n"));
1055                 if (ok == NEWSNNTP_ERROR_STREAM) {
1056                         session_destroy(SESSION(session));
1057                         REMOTE_FOLDER(item->folder)->session = NULL;
1058                 }
1059                 news_folder_unlock(NEWS_FOLDER(item->folder));
1060                 return msginfo;
1061         }
1062
1063         msginfo->to = news_parse_xhdr(hdrlist, msginfo);
1064         newsnntp_xhdr_free(hdrlist);
1065
1066         ok = nntp_threaded_xhdr(folder, "cc", num, num, &hdrlist);
1067
1068         if (ok != NEWSNNTP_NO_ERROR) {
1069                 log_warning(LOG_PROTOCOL, _("couldn't get xhdr\n"));
1070                 if (ok == NEWSNNTP_ERROR_STREAM) {
1071                         session_destroy(SESSION(session));
1072                         REMOTE_FOLDER(item->folder)->session = NULL;
1073                 }
1074                 news_folder_unlock(NEWS_FOLDER(item->folder));
1075                 return msginfo;
1076         }
1077
1078         msginfo->cc = news_parse_xhdr(hdrlist, msginfo);
1079         newsnntp_xhdr_free(hdrlist);
1080
1081         news_folder_unlock(NEWS_FOLDER(item->folder));
1082         return msginfo;
1083 }
1084
1085 static GSList *news_get_msginfos_for_range(NewsSession *session, FolderItem *item, guint begin, guint end)
1086 {
1087         GSList *newlist = NULL;
1088         GSList *llast = NULL;
1089         MsgInfo *msginfo;
1090         gint ok;
1091         clist *msglist = NULL;
1092         clistiter *cur;
1093         g_return_val_if_fail(session != NULL, NULL);
1094         g_return_val_if_fail(item != NULL, NULL);
1095
1096         log_message(LOG_PROTOCOL, _("getting xover %d - %d in %s...\n"),
1097                     begin, end, item->path);
1098
1099         news_folder_lock(NEWS_FOLDER(item->folder));
1100
1101         ok = nntp_threaded_xover(item->folder, begin, end, NULL, &msglist);
1102
1103         if (ok != NEWSNNTP_NO_ERROR) {
1104                 log_warning(LOG_PROTOCOL, _("couldn't get xover\n"));
1105                 if (ok == NEWSNNTP_ERROR_STREAM) {
1106                         session_destroy(SESSION(session));
1107                         REMOTE_FOLDER(item->folder)->session = NULL;
1108                 }
1109                 news_folder_unlock(NEWS_FOLDER(item->folder));
1110                 return NULL;
1111         }
1112
1113         for (cur = clist_begin(msglist); cur; cur = clist_next(cur)) {
1114                 struct newsnntp_xover_resp_item *ritem = (struct newsnntp_xover_resp_item *)clist_content(cur);
1115                 msginfo = news_parse_xover(ritem);
1116
1117                 if (!msginfo) {
1118                         log_warning(LOG_PROTOCOL, _("invalid xover line\n"));
1119                         continue;
1120                 }
1121
1122                 msginfo->folder = item;
1123                 news_set_msg_flags(item, msginfo);
1124                 msginfo->flags.tmp_flags |= MSG_NEWS;
1125                 msginfo->newsgroups = g_strdup(item->path);
1126
1127                 if (!newlist)
1128                         llast = newlist = g_slist_append(newlist, msginfo);
1129                 else {
1130                         llast = g_slist_append(llast, msginfo);
1131                         llast = llast->next;
1132                 }
1133         }
1134         newsnntp_xover_resp_list_free(msglist);
1135
1136         news_folder_unlock(NEWS_FOLDER(item->folder));
1137
1138         session_set_access_time(SESSION(session));
1139
1140         return newlist;
1141 }
1142
1143 static GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1144 {
1145         NewsSession *session;
1146         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1147         guint first, last, next;
1148         guint tofetch, fetched;
1149
1150         g_return_val_if_fail(folder != NULL, NULL);
1151         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
1152         g_return_val_if_fail(msgnum_list != NULL, NULL);
1153         g_return_val_if_fail(item != NULL, NULL);
1154
1155         session = news_session_get(folder);
1156         g_return_val_if_fail(session != NULL, NULL);
1157
1158         tmp_msgnum_list = g_slist_copy(msgnum_list);
1159         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, g_int_compare);
1160
1161         progressindicator_start(PROGRESS_TYPE_NETWORK);
1162         tofetch = g_slist_length(tmp_msgnum_list);
1163         fetched = 0;
1164
1165         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1166         last = first;
1167
1168         news_folder_lock(NEWS_FOLDER(item->folder));
1169
1170         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1171                 next = GPOINTER_TO_INT(elem->data);
1172                 if(next != (last + 1)) {
1173 /*                      session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1174                         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1175 */
1176                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1177                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1178                         fetched = last - first + 1;
1179                         first = next;
1180                 }
1181                 last = next;
1182         }
1183
1184         news_folder_unlock(NEWS_FOLDER(item->folder));
1185
1186 /*      session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1187         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1188 */
1189         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1190         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1191
1192         g_slist_free(tmp_msgnum_list);
1193
1194         progressindicator_stop(PROGRESS_TYPE_NETWORK);
1195
1196         return msginfo_list;
1197 }
1198
1199 static gboolean news_scan_required(Folder *folder, FolderItem *item)
1200 {
1201         return TRUE;
1202 }
1203
1204 void news_synchronise(FolderItem *item, gint days)
1205 {
1206         news_gtk_synchronise(item, days);
1207 }
1208
1209 static gint news_remove_folder(Folder *folder, FolderItem *item)
1210 {
1211         gchar *path;
1212
1213         g_return_val_if_fail(folder != NULL, -1);
1214         g_return_val_if_fail(item != NULL, -1);
1215         g_return_val_if_fail(item->path != NULL, -1);
1216
1217         path = folder_item_get_path(item);
1218         if (remove_dir_recursive(path) < 0) {
1219                 g_warning("can't remove directory `%s'\n", path);
1220                 g_free(path);
1221                 return -1;
1222         }
1223
1224         g_free(path);
1225         folder_item_remove(item);
1226         return 0;
1227 }
1228
1229 #else
1230 #include <glib.h>
1231 #include <glib/gi18n.h>
1232 #include <gtk/gtk.h>
1233 #include "folder.h"
1234 #include "alertpanel.h"
1235
1236 static FolderClass news_class;
1237
1238 static void warn_etpan(void)
1239 {
1240         static gboolean missing_news_warning = TRUE;
1241         if (missing_news_warning) {
1242                 missing_news_warning = FALSE;
1243                 alertpanel_error(
1244                         _("You have one or more News accounts "
1245                           "defined. However this version of "
1246                           "Claws Mail has been built without "
1247                           "News support; your News account(s) are "
1248                           "disabled.\n\n"
1249                           "You probably need to "
1250                           "install libetpan and recompile "
1251                           "Claws Mail."));
1252         }
1253 }
1254 static Folder *news_folder_new(const gchar *name, const gchar *path)
1255 {
1256         warn_etpan();
1257         return NULL;
1258 }
1259 void news_group_list_free(GSList *group_list)
1260 {
1261         warn_etpan();
1262 }
1263 void news_remove_group_list_cache(Folder *folder)
1264 {
1265         warn_etpan();
1266 }
1267 int news_folder_locked(Folder *folder)
1268 {
1269         warn_etpan();
1270         return 0;
1271 }
1272 gint news_post(Folder *folder, const gchar *file)
1273 {
1274         warn_etpan();
1275         return -1;
1276 }
1277
1278 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
1279 {
1280         warn_etpan();
1281         return -1;
1282 }
1283
1284 GSList *news_get_group_list(Folder *folder)
1285 {
1286         warn_etpan();
1287         return NULL;
1288 }
1289
1290
1291 FolderClass *news_get_class(void)
1292 {
1293         if (news_class.idstr == NULL) {
1294                 news_class.type = F_NEWS;
1295                 news_class.idstr = "news";
1296                 news_class.uistr = "News";
1297
1298                 /* Folder functions */
1299                 news_class.new_folder = news_folder_new;
1300         };
1301
1302         return &news_class;
1303 }
1304
1305
1306 #endif