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 #include "log.h"
  51 #if USE_OPENSSL
  52 #  include "ssl.h"
  53 #endif
  54
  55 #define NNTP_PORT       119
  56 #if USE_OPENSSL
  57 #define NNTPS_PORT      563
  58 #endif
  59
  60 static void news_folder_init             (Folder        *folder,
  61                                           const gchar   *name,
  62                                           const gchar   *path);
  63
  64 #if USE_OPENSSL
  65 static Session *news_session_new         (const gchar   *server,
  66                                           gushort        port,
  67                                           const gchar   *userid,
  68                                           const gchar   *passwd,
  69                                           SSLType        ssl_type);
  70 #else
  71 static Session *news_session_new         (const gchar   *server,
  72                                           gushort        port,
  73                                           const gchar   *userid,
  74                                           const gchar   *passwd);
  75 #endif
  76
  77 static gint news_get_article_cmd         (NNTPSession   *session,
  78                                           const gchar   *cmd,
  79                                           gint           num,
  80                                           gchar         *filename);
  81 static gint news_get_article             (NNTPSession   *session,
  82                                           gint           num,
  83                                           gchar         *filename);
  84
  85 static gint news_select_group            (NNTPSession   *session,
  86                                           const gchar   *group,
  87                                           gint          *num,
  88                                           gint          *first,
  89                                           gint          *last);
  90 static GSList *news_get_uncached_articles(NNTPSession   *session,
  91                                           FolderItem    *item,
  92                                           gint           cache_last,
  93                                           gint          *rfirst,
  94                                           gint          *rlast);
  95 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  96 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
  97                                           MsgInfo       *msginfo);
  98 static GSList *news_delete_old_articles  (GSList        *alist,
  99                                           FolderItem    *item,
 100                                           gint           first);
 101 static void news_delete_all_articles     (FolderItem    *item);
 102 static void news_delete_expired_caches   (GSList        *alist,
 103                                           FolderItem    *item);
 104
 105 static gint news_remove_msg              (Folder        *folder,
 106                                           FolderItem    *item,
 107                                           gint           num);
 108 gint news_get_num_list                   (Folder        *folder,
 109                                           FolderItem    *item,
 110                                           GSList       **list);
 111 MsgInfo *news_get_msginfo                (Folder        *folder,
 112                                           FolderItem    *item,
 113                                           gint           num);
 114 GSList *news_get_msginfos                (Folder        *folder,
 115                                           FolderItem    *item,
 116                                           GSList        *msgnum_list);
 117
 118 gint news_post_stream                    (Folder        *folder,
 119                                           FILE          *fp);
 120
 121 Folder *news_folder_new(const gchar *name, const gchar *path)
 122 {
 123         Folder *folder;
 124
 125         folder = (Folder *)g_new0(NewsFolder, 1);
 126         news_folder_init(folder, name, path);
 127
 128         return folder;
 129 }
 130
 131 void news_folder_destroy(Folder *folder)
 132 {
 133         gchar *dir;
 134
 135         dir = folder_get_path(folder);
 136         if (is_dir_exist(dir))
 137                 remove_dir_recursive(dir);
 138         g_free(dir);
 139
 140         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 141 }
 142
 143 static void news_folder_init(Folder *folder, const gchar *name,
 144                              const gchar *path)
 145 {
 146         folder->type = F_NEWS;
 147
 148         folder_remote_folder_init(folder, name, path);
 149
 150 /*
 151         folder->get_msg_list = news_get_article_list;
 152 */
 153         folder->fetch_msg    = news_fetch_msg;
 154 /*
 155         folder->scan         = news_scan_group;
 156 */
 157         folder->destroy      = news_folder_destroy;
 158         folder->remove_msg   = news_remove_msg;
 159         folder->get_num_list = news_get_num_list;
 160         folder->get_msginfo  = news_get_msginfo;
 161         folder->get_msginfos = news_get_msginfos;
 162 }
 163
 164 #if USE_OPENSSL
 165 static Session *news_session_new(const gchar *server, gushort port,
 166                                  const gchar *userid, const gchar *passwd,
 167                                  SSLType ssl_type)
 168 #else
 169 static Session *news_session_new(const gchar *server, gushort port,
 170                                  const gchar *userid, const gchar *passwd)
 171 #endif
 172 {
 173         gchar buf[NNTPBUFSIZE];
 174         NNTPSession *session;
 175         NNTPSockInfo *nntp_sock;
 176
 177         g_return_val_if_fail(server != NULL, NULL);
 178
 179         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 180
 181 #if USE_OPENSSL
 182         if (userid && passwd)
 183                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd,
 184                                            ssl_type);
 185         else
 186                 nntp_sock = nntp_open(server, port, buf, ssl_type);
 187 #else
 188         if (userid && passwd)
 189                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd);
 190         else
 191                 nntp_sock = nntp_open(server, port, buf);
 192 #endif
 193
 194         if (nntp_sock == NULL)
 195                 return NULL;
 196
 197         session = g_new(NNTPSession, 1);
 198         SESSION(session)->type             = SESSION_NEWS;
 199         SESSION(session)->server           = g_strdup(server);
 200         session->nntp_sock                 = nntp_sock;
 201         SESSION(session)->sock             = nntp_sock->sock;
 202         SESSION(session)->connected        = TRUE;
 203         SESSION(session)->phase            = SESSION_READY;
 204         SESSION(session)->last_access_time = time(NULL);
 205         SESSION(session)->data             = NULL;
 206
 207         SESSION(session)->destroy          = news_session_destroy;
 208
 209         session->group = NULL;
 210
 211         return SESSION(session);
 212 }
 213
 214 void news_session_destroy(Session *session)
 215 {
 216         nntp_close(NNTP_SESSION(session)->nntp_sock);
 217         NNTP_SESSION(session)->nntp_sock = NULL;
 218         session->sock = NULL;
 219
 220         g_free(NNTP_SESSION(session)->group);
 221 }
 222
 223 static Session *news_session_new_for_folder(Folder *folder)
 224 {
 225         Session *session;
 226         PrefsAccount *ac;
 227         const gchar *userid = NULL;
 228         gchar *passwd = NULL;
 229         gushort port;
 230         gchar buf[NNTPBUFSIZE];
 231
 232         g_return_val_if_fail(folder != NULL, NULL);
 233         g_return_val_if_fail(folder->account != NULL, NULL);
 234
 235         ac = folder->account;
 236         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 237                 userid = ac->userid;
 238                 if (ac->passwd && ac->passwd[0])
 239                         passwd = g_strdup(ac->passwd);
 240                 else
 241                         passwd = input_dialog_query_password(ac->nntp_server,
 242                                                              userid);
 243         }
 244
 245 #if USE_OPENSSL
 246         port = ac->set_nntpport ? ac->nntpport
 247                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 248         session = news_session_new(ac->nntp_server, port, userid, passwd,
 249                                    ac->ssl_nntp);
 250 #else
 251         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 252         session = news_session_new(ac->nntp_server, port, userid, passwd);
 253 #endif
 254         if (ac->use_nntp_auth && ac->use_nntp_auth_onconnect)
 255                 nntp_forceauth(NNTP_SESSION(session)->nntp_sock, buf, userid, passwd);
 256
 257         g_free(passwd);
 258
 259         return session;
 260 }
 261
 262 NNTPSession *news_session_get(Folder *folder)
 263 {
 264         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 265
 266         g_return_val_if_fail(folder != NULL, NULL);
 267         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 268         g_return_val_if_fail(folder->account != NULL, NULL);
 269
 270         if (!rfolder->session) {
 271                 rfolder->session = news_session_new_for_folder(folder);
 272                 return NNTP_SESSION(rfolder->session);
 273         }
 274
 275         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 276                 rfolder->session->last_access_time = time(NULL);
 277                 return NNTP_SESSION(rfolder->session);
 278         }
 279
 280         if (nntp_mode(NNTP_SESSION(rfolder->session)->nntp_sock, FALSE)
 281             != NN_SUCCESS) {
 282                 log_warning("NNTP connection to %s:%d has been"
 283                               " disconnected. Reconnecting...\n",
 284                             folder->account->nntp_server,
 285                             folder->account->set_nntpport ?
 286                             folder->account->nntpport : NNTP_PORT);
 287                 session_destroy(rfolder->session);
 288                 rfolder->session = news_session_new_for_folder(folder);
 289         }
 290
 291         if (rfolder->session)
 292                 rfolder->session->last_access_time = time(NULL);
 293         return NNTP_SESSION(rfolder->session);
 294 }
 295
 296 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 297                               gboolean use_cache)
 298 {
 299         GSList *alist;
 300         NNTPSession *session;
 301
 302         g_return_val_if_fail(folder != NULL, NULL);
 303         g_return_val_if_fail(item != NULL, NULL);
 304         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 305
 306         session = news_session_get(folder);
 307
 308         if (!session) {
 309                 alist = procmsg_read_cache(item, FALSE);
 310                 item->last_num = procmsg_get_last_num_in_msg_list(alist);
 311         } else if (use_cache) {
 312                 GSList *newlist;
 313                 gint cache_last;
 314                 gint first, last;
 315
 316                 alist = procmsg_read_cache(item, FALSE);
 317
 318                 cache_last = procmsg_get_last_num_in_msg_list(alist);
 319                 newlist = news_get_uncached_articles
 320                         (session, item, cache_last, &first, &last);
 321                 if (first == 0 && last == 0) {
 322                         news_delete_all_articles(item);
 323                         procmsg_msg_list_free(alist);
 324                         alist = NULL;
 325                 } else {
 326                         alist = news_delete_old_articles(alist, item, first);
 327                         news_delete_expired_caches(alist, item);
 328                 }
 329
 330                 alist = g_slist_concat(alist, newlist);
 331
 332                 item->last_num = last;
 333         } else {
 334                 gint last;
 335
 336                 alist = news_get_uncached_articles
 337                         (session, item, 0, NULL, &last);
 338                 news_delete_all_articles(item);
 339                 item->last_num = last;
 340         }
 341
 342         procmsg_set_flags(alist, item);
 343
 344         return alist;
 345 }
 346
 347 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 348 {
 349         gchar *path, *filename;
 350         NNTPSession *session;
 351         gint ok;
 352
 353         g_return_val_if_fail(folder != NULL, NULL);
 354         g_return_val_if_fail(item != NULL, NULL);
 355
 356         path = folder_item_get_path(item);
 357         if (!is_dir_exist(path))
 358                 make_dir_hier(path);
 359         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 360         g_free(path);
 361
 362         if (is_file_exist(filename)) {
 363                 debug_print("article %d has been already cached.\n", num);
 364                 return filename;
 365         }
 366
 367         session = news_session_get(folder);
 368         if (!session) {
 369                 g_free(filename);
 370                 return NULL;
 371         }
 372
 373         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 374         if (ok != NN_SUCCESS) {
 375                 g_warning("can't select group %s\n", item->path);
 376                 g_free(filename);
 377                 return NULL;
 378         }
 379
 380         debug_print("getting article %d...\n", num);
 381         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 382                               num, filename);
 383         if (ok < 0) {
 384                 g_warning("can't read article %d\n", num);
 385                 g_free(filename);
 386                 return NULL;
 387         }
 388
 389         return filename;
 390 }
 391
 392 gint news_scan_group(Folder *folder, FolderItem *item)
 393 {
 394         NNTPSession *session;
 395         gint num = 0, first = 0, last = 0;
 396         gint ok;
 397
 398         g_return_val_if_fail(folder != NULL, -1);
 399         g_return_val_if_fail(item != NULL, -1);
 400
 401         session = news_session_get(folder);
 402         if (!session) return -1;
 403
 404         ok = news_select_group(session, item->path, &num, &first, &last);
 405         if (ok != NN_SUCCESS) {
 406                 log_warning("can't set group: %s\n", item->path);
 407                 return -1;
 408         }
 409
 410         if (num == 0) {
 411                 item->new = item->unread = item->total = item->last_num = 0;
 412                 return 0;
 413         }
 414
 415 /*
 416         path = folder_item_get_path(item);
 417         if (path && is_dir_exist(path)) {
 418                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 419                                      first);
 420         }
 421         g_free(path);
 422
 423         if (max < first || last < min)
 424                 new = unread = total = num;
 425         else {
 426                 if (min < first)
 427                         min = first;
 428
 429                 if (last < max)
 430                         max = last;
 431                 else if (max < last) {
 432                         new += last - max;
 433                         unread += last - max;
 434                 }
 435
 436                 if (new > num) new = num;
 437                 if (unread > num) unread = num;
 438         }
 439
 440         item->new = new;
 441         item->unread = unread;
 442         item->total = num;
 443         item->last_num = last;
 444 */
 445         return 0;
 446 }
 447
 448 static NewsGroupInfo *news_group_info_new(const gchar *name,
 449                                           gint first, gint last, gchar type)
 450 {
 451         NewsGroupInfo *ginfo;
 452
 453         ginfo = g_new(NewsGroupInfo, 1);
 454         ginfo->name = g_strdup(name);
 455         ginfo->first = first;
 456         ginfo->last = last;
 457         ginfo->type = type;
 458
 459         return ginfo;
 460 }
 461
 462 static void news_group_info_free(NewsGroupInfo *ginfo)
 463 {
 464         g_free(ginfo->name);
 465         g_free(ginfo);
 466 }
 467
 468 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 469                                     NewsGroupInfo *ginfo2)
 470 {
 471         return g_strcasecmp(ginfo1->name, ginfo2->name);
 472 }
 473
 474 GSList *news_get_group_list(Folder *folder)
 475 {
 476         gchar *path, *filename;
 477         FILE *fp;
 478         GSList *list = NULL;
 479         GSList *last = NULL;
 480         gchar buf[NNTPBUFSIZE];
 481
 482         g_return_val_if_fail(folder != NULL, NULL);
 483         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 484
 485         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 486         if (!is_dir_exist(path))
 487                 make_dir_hier(path);
 488         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 489         g_free(path);
 490
 491         if ((fp = fopen(filename, "rb")) == NULL) {
 492                 NNTPSession *session;
 493
 494                 session = news_session_get(folder);
 495                 if (!session) {
 496                         g_free(filename);
 497                         return NULL;
 498                 }
 499
 500                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 501                         g_free(filename);
 502                         return NULL;
 503                 }
 504                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 505                         log_warning("can't retrieve newsgroup list\n");
 506                         session_destroy(SESSION(session));
 507                         REMOTE_FOLDER(folder)->session = NULL;
 508                         g_free(filename);
 509                         return NULL;
 510                 }
 511
 512                 if ((fp = fopen(filename, "rb")) == NULL) {
 513                         FILE_OP_ERROR(filename, "fopen");
 514                         g_free(filename);
 515                         return NULL;
 516                 }
 517         }
 518
 519         while (fgets(buf, sizeof(buf), fp) != NULL) {
 520                 gchar *p = buf;
 521                 gchar *name;
 522                 gint last_num;
 523                 gint first_num;
 524                 gchar type;
 525                 NewsGroupInfo *ginfo;
 526
 527                 p = strchr(p, ' ');
 528                 if (!p) continue;
 529                 *p = '\0';
 530                 p++;
 531                 name = buf;
 532
 533                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 534                         continue;
 535
 536                 ginfo = news_group_info_new(name, first_num, last_num, type);
 537
 538                 if (!last)
 539                         last = list = g_slist_append(NULL, ginfo);
 540                 else {
 541                         last = g_slist_append(last, ginfo);
 542                         last = last->next;
 543                 }
 544         }
 545
 546         fclose(fp);
 547         g_free(filename);
 548
 549         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 550
 551         return list;
 552 }
 553
 554 void news_group_list_free(GSList *group_list)
 555 {
 556         GSList *cur;
 557
 558         if (!group_list) return;
 559
 560         for (cur = group_list; cur != NULL; cur = cur->next)
 561                 news_group_info_free((NewsGroupInfo *)cur->data);
 562         g_slist_free(group_list);
 563 }
 564
 565 void news_remove_group_list_cache(Folder *folder)
 566 {
 567         gchar *path, *filename;
 568
 569         g_return_if_fail(folder != NULL);
 570         g_return_if_fail(folder->type == F_NEWS);
 571
 572         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 573         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 574         g_free(path);
 575
 576         if (is_file_exist(filename)) {
 577                 if (remove(filename) < 0)
 578                         FILE_OP_ERROR(filename, "remove");
 579         }
 580         g_free(filename);
 581 }
 582
 583 gint news_post(Folder *folder, const gchar *file)
 584 {
 585         FILE *fp;
 586         gint ok;
 587
 588         g_return_val_if_fail(folder != NULL, -1);
 589         g_return_val_if_fail(folder->type == F_NEWS, -1);
 590         g_return_val_if_fail(file != NULL, -1);
 591
 592         if ((fp = fopen(file, "rb")) == NULL) {
 593                 FILE_OP_ERROR(file, "fopen");
 594                 return -1;
 595         }
 596
 597         ok = news_post_stream(folder, fp);
 598
 599         fclose(fp);
 600
 601         return ok;
 602 }
 603
 604 gint news_post_stream(Folder *folder, FILE *fp)
 605 {
 606         NNTPSession *session;
 607         gint ok;
 608
 609         g_return_val_if_fail(folder != NULL, -1);
 610         g_return_val_if_fail(folder->type == F_NEWS, -1);
 611         g_return_val_if_fail(fp != NULL, -1);
 612
 613         session = news_session_get(folder);
 614         if (!session) return -1;
 615
 616         ok = nntp_post(session->nntp_sock, fp);
 617         if (ok != NN_SUCCESS) {
 618                 log_warning("can't post article.\n");
 619                 return -1;
 620         }
 621
 622         return 0;
 623 }
 624
 625 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 626                                  gint num, gchar *filename)
 627 {
 628         gchar *msgid;
 629
 630         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 631             != NN_SUCCESS)
 632                 return -1;
 633
 634         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 635         g_free(msgid);
 636
 637         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 638                 log_warning("can't retrieve article %d\n", num);
 639                 return -1;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 646 {
 647         gchar * dir;
 648         gint r;
 649
 650         dir = folder_item_get_path(item);
 651         debug_print("news_remove_msg: removing msg %d in %s\n",num,dir);
 652         r = remove_numbered_files(dir, num, num);
 653         g_free(dir);
 654
 655         return r;
 656 }
 657
 658 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 659 {
 660         return news_get_article_cmd(session, "ARTICLE", num, filename);
 661 }
 662
 663 /**
 664  * news_select_group:
 665  * @session: Active NNTP session.
 666  * @group: Newsgroup name.
 667  * @num: Estimated number of articles.
 668  * @first: First article number.
 669  * @last: Last article number.
 670  *
 671  * Select newsgroup @group with the GROUP command if it is not already
 672  * selected in @session, or article numbers need to be returned.
 673  *
 674  * Return value: NNTP result code.
 675  **/
 676 static gint news_select_group(NNTPSession *session, const gchar *group,
 677                               gint *num, gint *first, gint *last)
 678 {
 679         gint ok;
 680         gint num_, first_, last_;
 681
 682         if (!num || !first || !last) {
 683                 if (session->group && g_strcasecmp(session->group, group) == 0)
 684                         return NN_SUCCESS;
 685                 num = &num_;
 686                 first = &first_;
 687                 last = &last_;
 688         }
 689
 690         g_free(session->group);
 691         session->group = NULL;
 692
 693         ok = nntp_group(session->nntp_sock, group, num, first, last);
 694         if (ok == NN_SUCCESS)
 695                 session->group = g_strdup(group);
 696
 697         return ok;
 698 }
 699
 700 static GSList *news_get_uncached_articles(NNTPSession *session,
 701                                           FolderItem *item, gint cache_last,
 702                                           gint *rfirst, gint *rlast)
 703 {
 704         gint ok;
 705         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 706         gchar buf[NNTPBUFSIZE];
 707         GSList *newlist = NULL;
 708         GSList *llast = NULL;
 709         MsgInfo *msginfo;
 710
 711         if (rfirst) *rfirst = -1;
 712         if (rlast)  *rlast  = -1;
 713
 714         g_return_val_if_fail(session != NULL, NULL);
 715         g_return_val_if_fail(item != NULL, NULL);
 716         g_return_val_if_fail(item->folder != NULL, NULL);
 717         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 718
 719         ok = news_select_group(session, item->path, &num, &first, &last);
 720         if (ok != NN_SUCCESS) {
 721                 log_warning("can't set group: %s\n", item->path);
 722                 return NULL;
 723         }
 724
 725         /* calculate getting overview range */
 726         if (first > last) {
 727                 log_warning("invalid article range: %d - %d\n",
 728                             first, last);
 729                 return NULL;
 730         }
 731
 732         if (rfirst) *rfirst = first;
 733         if (rlast)  *rlast  = last;
 734
 735         if (cache_last < first)
 736                 begin = first;
 737         else if (last < cache_last)
 738                 begin = first;
 739         else if (last == cache_last) {
 740                 debug_print("no new articles.\n");
 741                 return NULL;
 742         } else
 743                 begin = cache_last + 1;
 744         end = last;
 745
 746         if (prefs_common.max_articles > 0 &&
 747             end - begin + 1 > prefs_common.max_articles)
 748                 begin = end - prefs_common.max_articles + 1;
 749
 750         log_message(_("getting xover %d - %d in %s...\n"),
 751                     begin, end, item->path);
 752         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 753                 log_warning("can't get xover\n");
 754                 return NULL;
 755         }
 756
 757         for (;;) {
 758                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 759                         log_warning("error occurred while getting xover.\n");
 760                         return newlist;
 761                 }
 762
 763                 if (buf[0] == '.' && buf[1] == '\r') break;
 764
 765                 msginfo = news_parse_xover(buf);
 766                 if (!msginfo) {
 767                         log_warning("invalid xover line: %s\n", buf);
 768                         continue;
 769                 }
 770
 771                 msginfo->folder = item;
 772                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 773                 msginfo->flags.tmp_flags = MSG_NEWS;
 774                 msginfo->newsgroups = g_strdup(item->path);
 775
 776                 if (!newlist)
 777                         llast = newlist = g_slist_append(newlist, msginfo);
 778                 else {
 779                         llast = g_slist_append(llast, msginfo);
 780                         llast = llast->next;
 781                 }
 782         }
 783
 784         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 785                 log_warning("can't get xhdr\n");
 786                 return newlist;
 787         }
 788
 789         llast = newlist;
 790
 791         for (;;) {
 792                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 793                         log_warning("error occurred while getting xhdr.\n");
 794                         return newlist;
 795                 }
 796
 797                 if (buf[0] == '.' && buf[1] == '\r') break;
 798                 if (!llast) {
 799                         g_warning("llast == NULL\n");
 800                         continue;
 801                 }
 802
 803                 msginfo = (MsgInfo *)llast->data;
 804                 msginfo->to = news_parse_xhdr(buf, msginfo);
 805
 806                 llast = llast->next;
 807         }
 808
 809         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 810                 log_warning("can't get xhdr\n");
 811                 return newlist;
 812         }
 813
 814         llast = newlist;
 815
 816         for (;;) {
 817                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 818                         log_warning("error occurred while getting xhdr.\n");
 819                         return newlist;
 820                 }
 821
 822                 if (buf[0] == '.' && buf[1] == '\r') break;
 823                 if (!llast) {
 824                         g_warning("llast == NULL\n");
 825                         continue;
 826                 }
 827
 828                 msginfo = (MsgInfo *)llast->data;
 829                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 830
 831                 llast = llast->next;
 832         }
 833
 834         return newlist;
 835 }
 836
 837 #define PARSE_ONE_PARAM(p, srcp) \
 838 { \
 839         p = strchr(srcp, '\t'); \
 840         if (!p) return NULL; \
 841         else \
 842                 *p++ = '\0'; \
 843 }
 844
 845 static MsgInfo *news_parse_xover(const gchar *xover_str)
 846 {
 847         MsgInfo *msginfo;
 848         gchar buf[NNTPBUFSIZE];
 849         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 850         gchar *p;
 851         gint num, size_int, line_int;
 852         gchar *xover_buf;
 853
 854         Xstrdup_a(xover_buf, xover_str, return NULL);
 855
 856         PARSE_ONE_PARAM(subject, xover_buf);
 857         PARSE_ONE_PARAM(sender, subject);
 858         PARSE_ONE_PARAM(date, sender);
 859         PARSE_ONE_PARAM(msgid, date);
 860         PARSE_ONE_PARAM(ref, msgid);
 861         PARSE_ONE_PARAM(size, ref);
 862         PARSE_ONE_PARAM(line, size);
 863         PARSE_ONE_PARAM(xref, line);
 864
 865         tmp = strchr(xref, '\t');
 866         if (!tmp) tmp = strchr(line, '\r');
 867         if (!tmp) tmp = strchr(line, '\n');
 868         if (tmp) *tmp = '\0';
 869
 870         num = atoi(xover_str);
 871         size_int = atoi(size);
 872         line_int = atoi(line);
 873
 874         /* set MsgInfo */
 875         msginfo = procmsg_msginfo_new();
 876         msginfo->msgnum = num;
 877         msginfo->size = size_int;
 878
 879         msginfo->date = g_strdup(date);
 880         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 881
 882         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 883         msginfo->from = g_strdup(buf);
 884         msginfo->fromname = procheader_get_fromname(buf);
 885
 886         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 887         msginfo->subject = g_strdup(buf);
 888
 889         extract_parenthesis(msgid, '<', '>');
 890         remove_space(msgid);
 891         if (*msgid != '\0')
 892                 msginfo->msgid = g_strdup(msgid);
 893
 894         msginfo->references = g_strdup(ref);
 895         eliminate_parenthesis(ref, '(', ')');
 896         if ((p = strrchr(ref, '<')) != NULL) {
 897                 extract_parenthesis(p, '<', '>');
 898                 remove_space(p);
 899                 if (*p != '\0')
 900                         msginfo->inreplyto = g_strdup(p);
 901         }
 902
 903         msginfo->xref = g_strdup(xref);
 904         p = msginfo->xref+strlen(msginfo->xref) - 1;
 905         while (*p == '\r' || *p == '\n') {
 906                 *p = '\0';
 907                 p--;
 908         }
 909
 910         return msginfo;
 911 }
 912
 913 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 914 {
 915         gchar *p;
 916         gchar *tmp;
 917         gint num;
 918
 919         p = strchr(xhdr_str, ' ');
 920         if (!p)
 921                 return NULL;
 922         else
 923                 p++;
 924
 925         num = atoi(xhdr_str);
 926         if (msginfo->msgnum != num) return NULL;
 927
 928         tmp = strchr(p, '\r');
 929         if (!tmp) tmp = strchr(p, '\n');
 930
 931         if (tmp)
 932                 return g_strndup(p, tmp - p);
 933         else
 934                 return g_strdup(p);
 935 }
 936
 937 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 938                                         gint first)
 939 {
 940         GSList *cur, *next;
 941         MsgInfo *msginfo;
 942         gchar *dir;
 943
 944         g_return_val_if_fail(item != NULL, alist);
 945         g_return_val_if_fail(item->folder != NULL, alist);
 946         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 947
 948         if (first < 2) return alist;
 949
 950         debug_print("Deleting cached articles 1 - %d ...\n", first - 1);
 951
 952         dir = folder_item_get_path(item);
 953         remove_numbered_files(dir, 1, first - 1);
 954         g_free(dir);
 955
 956         for (cur = alist; cur != NULL; ) {
 957                 next = cur->next;
 958
 959                 msginfo = (MsgInfo *)cur->data;
 960                 if (msginfo && msginfo->msgnum < first) {
 961                         procmsg_msginfo_free(msginfo);
 962                         alist = g_slist_remove(alist, msginfo);
 963                 }
 964
 965                 cur = next;
 966         }
 967
 968         return alist;
 969 }
 970
 971 static void news_delete_all_articles(FolderItem *item)
 972 {
 973         gchar *dir;
 974
 975         g_return_if_fail(item != NULL);
 976         g_return_if_fail(item->folder != NULL);
 977         g_return_if_fail(item->folder->type == F_NEWS);
 978
 979         debug_print("Deleting all cached articles...\n");
 980
 981         dir = folder_item_get_path(item);
 982         remove_all_numbered_files(dir);
 983         g_free(dir);
 984 }
 985
 986 static void news_delete_expired_caches(GSList *alist, FolderItem *item)
 987 {
 988         gchar *dir;
 989
 990         g_return_if_fail(item != NULL);
 991         g_return_if_fail(item->folder != NULL);
 992         g_return_if_fail(item->folder->type == F_NEWS);
 993
 994         debug_print("Deleting expired cached articles...\n");
 995
 996         dir = folder_item_get_path(item);
 997         remove_expired_files(dir, 24 * 7);
 998         g_free(dir);
 999 }
1000
1001 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
1002 {
1003         gchar * tmp;
1004         FILE * tmpfp;
1005         gchar buf[BUFFSIZE];
1006
1007         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
1008                               G_DIR_SEPARATOR, (gint)msginfo);
1009         if (tmp == NULL)
1010                 return -1;
1011
1012         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
1013                 FILE_OP_ERROR(tmp, "fopen");
1014                 return -1;
1015         }
1016         if (change_file_mode_rw(tmpfp, tmp) < 0) {
1017                 FILE_OP_ERROR(tmp, "chmod");
1018                 g_warning("can't change file mode\n");
1019         }
1020
1021         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
1022         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
1023         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
1024         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
1025         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
1026         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
1027         get_rfc822_date(buf, sizeof(buf));
1028         fprintf(tmpfp, "Date: %s\r\n", buf);
1029         fprintf(tmpfp, "\r\n");
1030         fprintf(tmpfp, "removed with sylpheed\r\n");
1031
1032         fclose(tmpfp);
1033
1034         news_post(folder, tmp);
1035         remove(tmp);
1036
1037         g_free(tmp);
1038
1039         return 0;
1040 }
1041
1042 gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list)
1043 {
1044         NNTPSession *session;
1045         gint i, ok, num, first, last, nummsgs = 0;
1046         gchar *dir;
1047
1048         g_return_val_if_fail(item != NULL, -1);
1049         g_return_val_if_fail(item->folder != NULL, -1);
1050         g_return_val_if_fail(item->folder->type == F_NEWS, -1);
1051
1052         session = news_session_get(folder);
1053         g_return_val_if_fail(session != NULL, -1);
1054
1055         ok = news_select_group(session, item->path, &num, &first, &last);
1056         if (ok != NN_SUCCESS) {
1057                 log_warning(_("can't set group: %s\n"), item->path);
1058                 return -1;
1059         }
1060
1061         if(last < first) {
1062                 log_warning(_("invalid article range: %d - %d\n"),
1063                             first, last);
1064                 return 0;
1065         }
1066
1067         for(i = first; i <= last; i++) {
1068                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(i));
1069                 nummsgs++;
1070         }
1071
1072         dir = folder_item_get_path(item);
1073         debug_print("removing old messages from %d to %d in %s\n", first, last, dir);
1074         remove_numbered_files(dir, 1, first - 1);
1075         g_free(dir);
1076
1077         return nummsgs;
1078 }
1079
1080 #define READ_TO_LISTEND(hdr) \
1081         while (!(buf[0] == '.' && buf[1] == '\r')) { \
1082                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
1083                         log_warning(_("error occurred while getting %s.\n"), hdr); \
1084                         return msginfo; \
1085                 } \
1086         }
1087
1088 MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
1089 {
1090         NNTPSession *session;
1091         MsgInfo *msginfo = NULL;
1092         gchar buf[NNTPBUFSIZE];
1093
1094         session = news_session_get(folder);
1095         g_return_val_if_fail(session != NULL, NULL);
1096         g_return_val_if_fail(item != NULL, NULL);
1097         g_return_val_if_fail(item->folder != NULL, NULL);
1098         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1099
1100         log_message(_("getting xover %d in %s...\n"),
1101                     num, item->path);
1102         if (nntp_xover(session->nntp_sock, num, num) != NN_SUCCESS) {
1103                 log_warning(_("can't get xover\n"));
1104                 return NULL;
1105         }
1106
1107         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1108                 log_warning(_("error occurred while getting xover.\n"));
1109                 return NULL;
1110         }
1111
1112         msginfo = news_parse_xover(buf);
1113         if (!msginfo) {
1114                 log_warning(_("invalid xover line: %s\n"), buf);
1115         }
1116
1117         READ_TO_LISTEND("xover");
1118
1119         if(!msginfo)
1120                 return NULL;
1121
1122         msginfo->folder = item;
1123         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1124         msginfo->flags.tmp_flags = MSG_NEWS;
1125         msginfo->newsgroups = g_strdup(item->path);
1126
1127         if (nntp_xhdr(session->nntp_sock, "to", num, num) != NN_SUCCESS) {
1128                 log_warning(_("can't get xhdr\n"));
1129                 return msginfo;
1130         }
1131
1132         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1133                 log_warning(_("error occurred while getting xhdr.\n"));
1134                 return msginfo;
1135         }
1136
1137         msginfo->to = news_parse_xhdr(buf, msginfo);
1138
1139         READ_TO_LISTEND("xhdr (to)");
1140
1141         if (nntp_xhdr(session->nntp_sock, "cc", num, num) != NN_SUCCESS) {
1142                 log_warning(_("can't get xhdr\n"));
1143                 return msginfo;
1144         }
1145
1146         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1147                 log_warning(_("error occurred while getting xhdr.\n"));
1148                 return msginfo;
1149         }
1150
1151         msginfo->cc = news_parse_xhdr(buf, msginfo);
1152
1153         READ_TO_LISTEND("xhdr (cc)");
1154
1155         return msginfo;
1156 }
1157
1158 static GSList *news_get_msginfos_for_range(NNTPSession *session, FolderItem *item, guint begin, guint end)
1159 {
1160         gchar buf[NNTPBUFSIZE];
1161         GSList *newlist = NULL;
1162         GSList *llast = NULL;
1163         MsgInfo *msginfo;
1164
1165         g_return_val_if_fail(session != NULL, NULL);
1166         g_return_val_if_fail(item != NULL, NULL);
1167
1168         log_message(_("getting xover %d - %d in %s...\n"),
1169                     begin, end, item->path);
1170         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
1171                 log_warning(_("can't get xover\n"));
1172                 return NULL;
1173         }
1174
1175         for (;;) {
1176                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1177                         log_warning(_("error occurred while getting xover.\n"));
1178                         return newlist;
1179                 }
1180
1181                 if (buf[0] == '.' && buf[1] == '\r') break;
1182
1183                 msginfo = news_parse_xover(buf);
1184                 if (!msginfo) {
1185                         log_warning(_("invalid xover line: %s\n"), buf);
1186                         continue;
1187                 }
1188
1189                 msginfo->folder = item;
1190                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1191                 msginfo->flags.tmp_flags = MSG_NEWS;
1192                 msginfo->newsgroups = g_strdup(item->path);
1193
1194                 if (!newlist)
1195                         llast = newlist = g_slist_append(newlist, msginfo);
1196                 else {
1197                         llast = g_slist_append(llast, msginfo);
1198                         llast = llast->next;
1199                 }
1200         }
1201
1202         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
1203                 log_warning(_("can't get xhdr\n"));
1204                 return newlist;
1205         }
1206
1207         llast = newlist;
1208
1209         for (;;) {
1210                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1211                         log_warning(_("error occurred while getting xhdr.\n"));
1212                         return newlist;
1213                 }
1214
1215                 if (buf[0] == '.' && buf[1] == '\r') break;
1216                 if (!llast) {
1217                         g_warning("llast == NULL\n");
1218                         continue;
1219                 }
1220
1221                 msginfo = (MsgInfo *)llast->data;
1222                 msginfo->to = news_parse_xhdr(buf, msginfo);
1223
1224                 llast = llast->next;
1225         }
1226
1227         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
1228                 log_warning(_("can't get xhdr\n"));
1229                 return newlist;
1230         }
1231
1232         llast = newlist;
1233
1234         for (;;) {
1235                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1236                         log_warning(_("error occurred while getting xhdr.\n"));
1237                         return newlist;
1238                 }
1239
1240                 if (buf[0] == '.' && buf[1] == '\r') break;
1241                 if (!llast) {
1242                         g_warning("llast == NULL\n");
1243                         continue;
1244                 }
1245
1246                 msginfo = (MsgInfo *)llast->data;
1247                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1248
1249                 llast = llast->next;
1250         }
1251
1252         return newlist;
1253 }
1254
1255 gint news_fetch_msgnum_sort(gconstpointer a, gconstpointer b)
1256 {
1257         return (GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b));
1258 }
1259
1260 GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1261 {
1262         NNTPSession *session;
1263         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1264         guint first, last, next;
1265
1266         g_return_val_if_fail(folder != NULL, NULL);
1267         g_return_val_if_fail(folder->type == F_NEWS, NULL);
1268         g_return_val_if_fail(msgnum_list != NULL, NULL);
1269         g_return_val_if_fail(item != NULL, NULL);
1270
1271         session = news_session_get(folder);
1272         g_return_val_if_fail(session != NULL, NULL);
1273
1274         tmp_msgnum_list = g_slist_copy(msgnum_list);
1275         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, news_fetch_msgnum_sort);
1276
1277         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1278         last = first;
1279         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1280                 next = GPOINTER_TO_INT(elem->data);
1281                 if(next != (last + 1)) {
1282                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1283                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1284                         first = next;
1285                 }
1286                 last = next;
1287         }
1288         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1289         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1290
1291         g_slist_free(tmp_msgnum_list);
1292
1293         return msginfo_list;
1294 }