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                 session_destroy(SESSION(session));
 386                 REMOTE_FOLDER(folder)->session = NULL;
 387                 g_free(filename);
 388                 return NULL;
 389         }
 390
 391         return filename;
 392 }
 393
 394 gint news_scan_group(Folder *folder, FolderItem *item)
 395 {
 396         NNTPSession *session;
 397         gint num = 0, first = 0, last = 0;
 398         gint ok;
 399
 400         g_return_val_if_fail(folder != NULL, -1);
 401         g_return_val_if_fail(item != NULL, -1);
 402
 403         session = news_session_get(folder);
 404         if (!session) return -1;
 405
 406         ok = news_select_group(session, item->path, &num, &first, &last);
 407         if (ok != NN_SUCCESS) {
 408                 log_warning("can't set group: %s\n", item->path);
 409                 return -1;
 410         }
 411
 412         if (num == 0) {
 413                 item->new = item->unread = item->total = item->last_num = 0;
 414                 return 0;
 415         }
 416
 417 /*
 418         path = folder_item_get_path(item);
 419         if (path && is_dir_exist(path)) {
 420                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 421                                      first);
 422         }
 423         g_free(path);
 424
 425         if (max < first || last < min)
 426                 new = unread = total = num;
 427         else {
 428                 if (min < first)
 429                         min = first;
 430
 431                 if (last < max)
 432                         max = last;
 433                 else if (max < last) {
 434                         new += last - max;
 435                         unread += last - max;
 436                 }
 437
 438                 if (new > num) new = num;
 439                 if (unread > num) unread = num;
 440         }
 441
 442         item->new = new;
 443         item->unread = unread;
 444         item->total = num;
 445         item->last_num = last;
 446 */
 447         return 0;
 448 }
 449
 450 static NewsGroupInfo *news_group_info_new(const gchar *name,
 451                                           gint first, gint last, gchar type)
 452 {
 453         NewsGroupInfo *ginfo;
 454
 455         ginfo = g_new(NewsGroupInfo, 1);
 456         ginfo->name = g_strdup(name);
 457         ginfo->first = first;
 458         ginfo->last = last;
 459         ginfo->type = type;
 460
 461         return ginfo;
 462 }
 463
 464 static void news_group_info_free(NewsGroupInfo *ginfo)
 465 {
 466         g_free(ginfo->name);
 467         g_free(ginfo);
 468 }
 469
 470 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 471                                     NewsGroupInfo *ginfo2)
 472 {
 473         return g_strcasecmp(ginfo1->name, ginfo2->name);
 474 }
 475
 476 GSList *news_get_group_list(Folder *folder)
 477 {
 478         gchar *path, *filename;
 479         FILE *fp;
 480         GSList *list = NULL;
 481         GSList *last = NULL;
 482         gchar buf[NNTPBUFSIZE];
 483
 484         g_return_val_if_fail(folder != NULL, NULL);
 485         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 486
 487         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 488         if (!is_dir_exist(path))
 489                 make_dir_hier(path);
 490         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 491         g_free(path);
 492
 493         if ((fp = fopen(filename, "rb")) == NULL) {
 494                 NNTPSession *session;
 495
 496                 session = news_session_get(folder);
 497                 if (!session) {
 498                         g_free(filename);
 499                         return NULL;
 500                 }
 501
 502                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 503                         g_free(filename);
 504                         return NULL;
 505                 }
 506                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 507                         log_warning("can't retrieve newsgroup list\n");
 508                         session_destroy(SESSION(session));
 509                         REMOTE_FOLDER(folder)->session = NULL;
 510                         g_free(filename);
 511                         return NULL;
 512                 }
 513
 514                 if ((fp = fopen(filename, "rb")) == NULL) {
 515                         FILE_OP_ERROR(filename, "fopen");
 516                         g_free(filename);
 517                         return NULL;
 518                 }
 519         }
 520
 521         while (fgets(buf, sizeof(buf), fp) != NULL) {
 522                 gchar *p = buf;
 523                 gchar *name;
 524                 gint last_num;
 525                 gint first_num;
 526                 gchar type;
 527                 NewsGroupInfo *ginfo;
 528
 529                 p = strchr(p, ' ');
 530                 if (!p) continue;
 531                 *p = '\0';
 532                 p++;
 533                 name = buf;
 534
 535                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 536                         continue;
 537
 538                 ginfo = news_group_info_new(name, first_num, last_num, type);
 539
 540                 if (!last)
 541                         last = list = g_slist_append(NULL, ginfo);
 542                 else {
 543                         last = g_slist_append(last, ginfo);
 544                         last = last->next;
 545                 }
 546         }
 547
 548         fclose(fp);
 549         g_free(filename);
 550
 551         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 552
 553         return list;
 554 }
 555
 556 void news_group_list_free(GSList *group_list)
 557 {
 558         GSList *cur;
 559
 560         if (!group_list) return;
 561
 562         for (cur = group_list; cur != NULL; cur = cur->next)
 563                 news_group_info_free((NewsGroupInfo *)cur->data);
 564         g_slist_free(group_list);
 565 }
 566
 567 void news_remove_group_list_cache(Folder *folder)
 568 {
 569         gchar *path, *filename;
 570
 571         g_return_if_fail(folder != NULL);
 572         g_return_if_fail(folder->type == F_NEWS);
 573
 574         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 575         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 576         g_free(path);
 577
 578         if (is_file_exist(filename)) {
 579                 if (remove(filename) < 0)
 580                         FILE_OP_ERROR(filename, "remove");
 581         }
 582         g_free(filename);
 583 }
 584
 585 gint news_post(Folder *folder, const gchar *file)
 586 {
 587         FILE *fp;
 588         gint ok;
 589
 590         g_return_val_if_fail(folder != NULL, -1);
 591         g_return_val_if_fail(folder->type == F_NEWS, -1);
 592         g_return_val_if_fail(file != NULL, -1);
 593
 594         if ((fp = fopen(file, "rb")) == NULL) {
 595                 FILE_OP_ERROR(file, "fopen");
 596                 return -1;
 597         }
 598
 599         ok = news_post_stream(folder, fp);
 600
 601         fclose(fp);
 602
 603         return ok;
 604 }
 605
 606 gint news_post_stream(Folder *folder, FILE *fp)
 607 {
 608         NNTPSession *session;
 609         gint ok;
 610
 611         g_return_val_if_fail(folder != NULL, -1);
 612         g_return_val_if_fail(folder->type == F_NEWS, -1);
 613         g_return_val_if_fail(fp != NULL, -1);
 614
 615         session = news_session_get(folder);
 616         if (!session) return -1;
 617
 618         ok = nntp_post(session->nntp_sock, fp);
 619         if (ok != NN_SUCCESS) {
 620                 log_warning("can't post article.\n");
 621                 return -1;
 622         }
 623
 624         return 0;
 625 }
 626
 627 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 628                                  gint num, gchar *filename)
 629 {
 630         gchar *msgid;
 631
 632         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 633             != NN_SUCCESS)
 634                 return -1;
 635
 636         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 637         g_free(msgid);
 638
 639         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 640                 log_warning("can't retrieve article %d\n", num);
 641                 return -1;
 642         }
 643
 644         return 0;
 645 }
 646
 647 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 648 {
 649         gchar * dir;
 650         gint r;
 651
 652         dir = folder_item_get_path(item);
 653         debug_print("news_remove_msg: removing msg %d in %s\n",num,dir);
 654         r = remove_numbered_files(dir, num, num);
 655         g_free(dir);
 656
 657         return r;
 658 }
 659
 660 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 661 {
 662         return news_get_article_cmd(session, "ARTICLE", num, filename);
 663 }
 664
 665 /**
 666  * news_select_group:
 667  * @session: Active NNTP session.
 668  * @group: Newsgroup name.
 669  * @num: Estimated number of articles.
 670  * @first: First article number.
 671  * @last: Last article number.
 672  *
 673  * Select newsgroup @group with the GROUP command if it is not already
 674  * selected in @session, or article numbers need to be returned.
 675  *
 676  * Return value: NNTP result code.
 677  **/
 678 static gint news_select_group(NNTPSession *session, const gchar *group,
 679                               gint *num, gint *first, gint *last)
 680 {
 681         gint ok;
 682         gint num_, first_, last_;
 683
 684         if (!num || !first || !last) {
 685                 if (session->group && g_strcasecmp(session->group, group) == 0)
 686                         return NN_SUCCESS;
 687                 num = &num_;
 688                 first = &first_;
 689                 last = &last_;
 690         }
 691
 692         g_free(session->group);
 693         session->group = NULL;
 694
 695         ok = nntp_group(session->nntp_sock, group, num, first, last);
 696         if (ok == NN_SUCCESS)
 697                 session->group = g_strdup(group);
 698
 699         return ok;
 700 }
 701
 702 static GSList *news_get_uncached_articles(NNTPSession *session,
 703                                           FolderItem *item, gint cache_last,
 704                                           gint *rfirst, gint *rlast)
 705 {
 706         gint ok;
 707         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 708         gchar buf[NNTPBUFSIZE];
 709         GSList *newlist = NULL;
 710         GSList *llast = NULL;
 711         MsgInfo *msginfo;
 712
 713         if (rfirst) *rfirst = -1;
 714         if (rlast)  *rlast  = -1;
 715
 716         g_return_val_if_fail(session != NULL, NULL);
 717         g_return_val_if_fail(item != NULL, NULL);
 718         g_return_val_if_fail(item->folder != NULL, NULL);
 719         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 720
 721         ok = news_select_group(session, item->path, &num, &first, &last);
 722         if (ok != NN_SUCCESS) {
 723                 log_warning("can't set group: %s\n", item->path);
 724                 return NULL;
 725         }
 726
 727         /* calculate getting overview range */
 728         if (first > last) {
 729                 log_warning("invalid article range: %d - %d\n",
 730                             first, last);
 731                 return NULL;
 732         }
 733
 734         if (rfirst) *rfirst = first;
 735         if (rlast)  *rlast  = last;
 736
 737         if (cache_last < first)
 738                 begin = first;
 739         else if (last < cache_last)
 740                 begin = first;
 741         else if (last == cache_last) {
 742                 debug_print("no new articles.\n");
 743                 return NULL;
 744         } else
 745                 begin = cache_last + 1;
 746         end = last;
 747
 748         if (prefs_common.max_articles > 0 &&
 749             end - begin + 1 > prefs_common.max_articles)
 750                 begin = end - prefs_common.max_articles + 1;
 751
 752         log_message(_("getting xover %d - %d in %s...\n"),
 753                     begin, end, item->path);
 754         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 755                 log_warning("can't get xover\n");
 756                 return NULL;
 757         }
 758
 759         for (;;) {
 760                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 761                         log_warning("error occurred while getting xover.\n");
 762                         return newlist;
 763                 }
 764
 765                 if (buf[0] == '.' && buf[1] == '\r') break;
 766
 767                 msginfo = news_parse_xover(buf);
 768                 if (!msginfo) {
 769                         log_warning("invalid xover line: %s\n", buf);
 770                         continue;
 771                 }
 772
 773                 msginfo->folder = item;
 774                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 775                 msginfo->flags.tmp_flags = MSG_NEWS;
 776                 msginfo->newsgroups = g_strdup(item->path);
 777
 778                 if (!newlist)
 779                         llast = newlist = g_slist_append(newlist, msginfo);
 780                 else {
 781                         llast = g_slist_append(llast, msginfo);
 782                         llast = llast->next;
 783                 }
 784         }
 785
 786         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 787                 log_warning("can't get xhdr\n");
 788                 return newlist;
 789         }
 790
 791         llast = newlist;
 792
 793         for (;;) {
 794                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 795                         log_warning("error occurred while getting xhdr.\n");
 796                         return newlist;
 797                 }
 798
 799                 if (buf[0] == '.' && buf[1] == '\r') break;
 800                 if (!llast) {
 801                         g_warning("llast == NULL\n");
 802                         continue;
 803                 }
 804
 805                 msginfo = (MsgInfo *)llast->data;
 806                 msginfo->to = news_parse_xhdr(buf, msginfo);
 807
 808                 llast = llast->next;
 809         }
 810
 811         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 812                 log_warning("can't get xhdr\n");
 813                 return newlist;
 814         }
 815
 816         llast = newlist;
 817
 818         for (;;) {
 819                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 820                         log_warning("error occurred while getting xhdr.\n");
 821                         return newlist;
 822                 }
 823
 824                 if (buf[0] == '.' && buf[1] == '\r') break;
 825                 if (!llast) {
 826                         g_warning("llast == NULL\n");
 827                         continue;
 828                 }
 829
 830                 msginfo = (MsgInfo *)llast->data;
 831                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 832
 833                 llast = llast->next;
 834         }
 835
 836         return newlist;
 837 }
 838
 839 #define PARSE_ONE_PARAM(p, srcp) \
 840 { \
 841         p = strchr(srcp, '\t'); \
 842         if (!p) return NULL; \
 843         else \
 844                 *p++ = '\0'; \
 845 }
 846
 847 static MsgInfo *news_parse_xover(const gchar *xover_str)
 848 {
 849         MsgInfo *msginfo;
 850         gchar buf[NNTPBUFSIZE];
 851         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 852         gchar *p;
 853         gint num, size_int, line_int;
 854         gchar *xover_buf;
 855
 856         Xstrdup_a(xover_buf, xover_str, return NULL);
 857
 858         PARSE_ONE_PARAM(subject, xover_buf);
 859         PARSE_ONE_PARAM(sender, subject);
 860         PARSE_ONE_PARAM(date, sender);
 861         PARSE_ONE_PARAM(msgid, date);
 862         PARSE_ONE_PARAM(ref, msgid);
 863         PARSE_ONE_PARAM(size, ref);
 864         PARSE_ONE_PARAM(line, size);
 865         PARSE_ONE_PARAM(xref, line);
 866
 867         tmp = strchr(xref, '\t');
 868         if (!tmp) tmp = strchr(line, '\r');
 869         if (!tmp) tmp = strchr(line, '\n');
 870         if (tmp) *tmp = '\0';
 871
 872         num = atoi(xover_str);
 873         size_int = atoi(size);
 874         line_int = atoi(line);
 875
 876         /* set MsgInfo */
 877         msginfo = procmsg_msginfo_new();
 878         msginfo->msgnum = num;
 879         msginfo->size = size_int;
 880
 881         msginfo->date = g_strdup(date);
 882         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 883
 884         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 885         msginfo->from = g_strdup(buf);
 886         msginfo->fromname = procheader_get_fromname(buf);
 887
 888         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 889         msginfo->subject = g_strdup(buf);
 890
 891         extract_parenthesis(msgid, '<', '>');
 892         remove_space(msgid);
 893         if (*msgid != '\0')
 894                 msginfo->msgid = g_strdup(msgid);
 895
 896         msginfo->references = g_strdup(ref);
 897         eliminate_parenthesis(ref, '(', ')');
 898         if ((p = strrchr(ref, '<')) != NULL) {
 899                 extract_parenthesis(p, '<', '>');
 900                 remove_space(p);
 901                 if (*p != '\0')
 902                         msginfo->inreplyto = g_strdup(p);
 903         }
 904
 905         msginfo->xref = g_strdup(xref);
 906         p = msginfo->xref+strlen(msginfo->xref) - 1;
 907         while (*p == '\r' || *p == '\n') {
 908                 *p = '\0';
 909                 p--;
 910         }
 911
 912         return msginfo;
 913 }
 914
 915 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 916 {
 917         gchar *p;
 918         gchar *tmp;
 919         gint num;
 920
 921         p = strchr(xhdr_str, ' ');
 922         if (!p)
 923                 return NULL;
 924         else
 925                 p++;
 926
 927         num = atoi(xhdr_str);
 928         if (msginfo->msgnum != num) return NULL;
 929
 930         tmp = strchr(p, '\r');
 931         if (!tmp) tmp = strchr(p, '\n');
 932
 933         if (tmp)
 934                 return g_strndup(p, tmp - p);
 935         else
 936                 return g_strdup(p);
 937 }
 938
 939 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 940                                         gint first)
 941 {
 942         GSList *cur, *next;
 943         MsgInfo *msginfo;
 944         gchar *dir;
 945
 946         g_return_val_if_fail(item != NULL, alist);
 947         g_return_val_if_fail(item->folder != NULL, alist);
 948         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 949
 950         if (first < 2) return alist;
 951
 952         debug_print("Deleting cached articles 1 - %d ...\n", first - 1);
 953
 954         dir = folder_item_get_path(item);
 955         remove_numbered_files(dir, 1, first - 1);
 956         g_free(dir);
 957
 958         for (cur = alist; cur != NULL; ) {
 959                 next = cur->next;
 960
 961                 msginfo = (MsgInfo *)cur->data;
 962                 if (msginfo && msginfo->msgnum < first) {
 963                         procmsg_msginfo_free(msginfo);
 964                         alist = g_slist_remove(alist, msginfo);
 965                 }
 966
 967                 cur = next;
 968         }
 969
 970         return alist;
 971 }
 972
 973 static void news_delete_all_articles(FolderItem *item)
 974 {
 975         gchar *dir;
 976
 977         g_return_if_fail(item != NULL);
 978         g_return_if_fail(item->folder != NULL);
 979         g_return_if_fail(item->folder->type == F_NEWS);
 980
 981         debug_print("Deleting all cached articles...\n");
 982
 983         dir = folder_item_get_path(item);
 984         remove_all_numbered_files(dir);
 985         g_free(dir);
 986 }
 987
 988 static void news_delete_expired_caches(GSList *alist, FolderItem *item)
 989 {
 990         gchar *dir;
 991
 992         g_return_if_fail(item != NULL);
 993         g_return_if_fail(item->folder != NULL);
 994         g_return_if_fail(item->folder->type == F_NEWS);
 995
 996         debug_print("Deleting expired cached articles...\n");
 997
 998         dir = folder_item_get_path(item);
 999         remove_expired_files(dir, 24 * 7);
1000         g_free(dir);
1001 }
1002
1003 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
1004 {
1005         gchar * tmp;
1006         FILE * tmpfp;
1007         gchar buf[BUFFSIZE];
1008
1009         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
1010                               G_DIR_SEPARATOR, (gint)msginfo);
1011         if (tmp == NULL)
1012                 return -1;
1013
1014         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
1015                 FILE_OP_ERROR(tmp, "fopen");
1016                 return -1;
1017         }
1018         if (change_file_mode_rw(tmpfp, tmp) < 0) {
1019                 FILE_OP_ERROR(tmp, "chmod");
1020                 g_warning("can't change file mode\n");
1021         }
1022
1023         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
1024         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
1025         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
1026         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
1027         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
1028         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
1029         get_rfc822_date(buf, sizeof(buf));
1030         fprintf(tmpfp, "Date: %s\r\n", buf);
1031         fprintf(tmpfp, "\r\n");
1032         fprintf(tmpfp, "removed with sylpheed\r\n");
1033
1034         fclose(tmpfp);
1035
1036         news_post(folder, tmp);
1037         remove(tmp);
1038
1039         g_free(tmp);
1040
1041         return 0;
1042 }
1043
1044 gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list)
1045 {
1046         NNTPSession *session;
1047         gint i, ok, num, first, last, nummsgs = 0;
1048         gchar *dir;
1049
1050         g_return_val_if_fail(item != NULL, -1);
1051         g_return_val_if_fail(item->folder != NULL, -1);
1052         g_return_val_if_fail(item->folder->type == F_NEWS, -1);
1053
1054         session = news_session_get(folder);
1055         g_return_val_if_fail(session != NULL, -1);
1056
1057         ok = news_select_group(session, item->path, &num, &first, &last);
1058         if (ok != NN_SUCCESS) {
1059                 log_warning(_("can't set group: %s\n"), item->path);
1060                 return -1;
1061         }
1062
1063         if(last < first) {
1064                 log_warning(_("invalid article range: %d - %d\n"),
1065                             first, last);
1066                 return 0;
1067         }
1068
1069         for(i = first; i <= last; i++) {
1070                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(i));
1071                 nummsgs++;
1072         }
1073
1074         dir = folder_item_get_path(item);
1075         debug_print("removing old messages from %d to %d in %s\n", first, last, dir);
1076         remove_numbered_files(dir, 1, first - 1);
1077         g_free(dir);
1078
1079         return nummsgs;
1080 }
1081
1082 #define READ_TO_LISTEND(hdr) \
1083         while (!(buf[0] == '.' && buf[1] == '\r')) { \
1084                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
1085                         log_warning(_("error occurred while getting %s.\n"), hdr); \
1086                         return msginfo; \
1087                 } \
1088         }
1089
1090 MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
1091 {
1092         NNTPSession *session;
1093         MsgInfo *msginfo = NULL;
1094         gchar buf[NNTPBUFSIZE];
1095
1096         session = news_session_get(folder);
1097         g_return_val_if_fail(session != NULL, NULL);
1098         g_return_val_if_fail(item != NULL, NULL);
1099         g_return_val_if_fail(item->folder != NULL, NULL);
1100         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
1101
1102         log_message(_("getting xover %d in %s...\n"),
1103                     num, item->path);
1104         if (nntp_xover(session->nntp_sock, num, num) != NN_SUCCESS) {
1105                 log_warning(_("can't get xover\n"));
1106                 return NULL;
1107         }
1108
1109         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1110                 log_warning(_("error occurred while getting xover.\n"));
1111                 return NULL;
1112         }
1113
1114         msginfo = news_parse_xover(buf);
1115         if (!msginfo) {
1116                 log_warning(_("invalid xover line: %s\n"), buf);
1117         }
1118
1119         READ_TO_LISTEND("xover");
1120
1121         if(!msginfo)
1122                 return NULL;
1123
1124         msginfo->folder = item;
1125         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1126         msginfo->flags.tmp_flags = MSG_NEWS;
1127         msginfo->newsgroups = g_strdup(item->path);
1128
1129         if (nntp_xhdr(session->nntp_sock, "to", num, num) != NN_SUCCESS) {
1130                 log_warning(_("can't get xhdr\n"));
1131                 return msginfo;
1132         }
1133
1134         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1135                 log_warning(_("error occurred while getting xhdr.\n"));
1136                 return msginfo;
1137         }
1138
1139         msginfo->to = news_parse_xhdr(buf, msginfo);
1140
1141         READ_TO_LISTEND("xhdr (to)");
1142
1143         if (nntp_xhdr(session->nntp_sock, "cc", num, num) != NN_SUCCESS) {
1144                 log_warning(_("can't get xhdr\n"));
1145                 return msginfo;
1146         }
1147
1148         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1149                 log_warning(_("error occurred while getting xhdr.\n"));
1150                 return msginfo;
1151         }
1152
1153         msginfo->cc = news_parse_xhdr(buf, msginfo);
1154
1155         READ_TO_LISTEND("xhdr (cc)");
1156
1157         return msginfo;
1158 }
1159
1160 static GSList *news_get_msginfos_for_range(NNTPSession *session, FolderItem *item, guint begin, guint end)
1161 {
1162         gchar buf[NNTPBUFSIZE];
1163         GSList *newlist = NULL;
1164         GSList *llast = NULL;
1165         MsgInfo *msginfo;
1166
1167         g_return_val_if_fail(session != NULL, NULL);
1168         g_return_val_if_fail(item != NULL, NULL);
1169
1170         log_message(_("getting xover %d - %d in %s...\n"),
1171                     begin, end, item->path);
1172         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
1173                 log_warning(_("can't get xover\n"));
1174                 return NULL;
1175         }
1176
1177         for (;;) {
1178                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1179                         log_warning(_("error occurred while getting xover.\n"));
1180                         return newlist;
1181                 }
1182
1183                 if (buf[0] == '.' && buf[1] == '\r') break;
1184
1185                 msginfo = news_parse_xover(buf);
1186                 if (!msginfo) {
1187                         log_warning(_("invalid xover line: %s\n"), buf);
1188                         continue;
1189                 }
1190
1191                 msginfo->folder = item;
1192                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
1193                 msginfo->flags.tmp_flags = MSG_NEWS;
1194                 msginfo->newsgroups = g_strdup(item->path);
1195
1196                 if (!newlist)
1197                         llast = newlist = g_slist_append(newlist, msginfo);
1198                 else {
1199                         llast = g_slist_append(llast, msginfo);
1200                         llast = llast->next;
1201                 }
1202         }
1203
1204         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
1205                 log_warning(_("can't get xhdr\n"));
1206                 return newlist;
1207         }
1208
1209         llast = newlist;
1210
1211         for (;;) {
1212                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1213                         log_warning(_("error occurred while getting xhdr.\n"));
1214                         return newlist;
1215                 }
1216
1217                 if (buf[0] == '.' && buf[1] == '\r') break;
1218                 if (!llast) {
1219                         g_warning("llast == NULL\n");
1220                         continue;
1221                 }
1222
1223                 msginfo = (MsgInfo *)llast->data;
1224                 msginfo->to = news_parse_xhdr(buf, msginfo);
1225
1226                 llast = llast->next;
1227         }
1228
1229         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
1230                 log_warning(_("can't get xhdr\n"));
1231                 return newlist;
1232         }
1233
1234         llast = newlist;
1235
1236         for (;;) {
1237                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1238                         log_warning(_("error occurred while getting xhdr.\n"));
1239                         return newlist;
1240                 }
1241
1242                 if (buf[0] == '.' && buf[1] == '\r') break;
1243                 if (!llast) {
1244                         g_warning("llast == NULL\n");
1245                         continue;
1246                 }
1247
1248                 msginfo = (MsgInfo *)llast->data;
1249                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1250
1251                 llast = llast->next;
1252         }
1253
1254         return newlist;
1255 }
1256
1257 gint news_fetch_msgnum_sort(gconstpointer a, gconstpointer b)
1258 {
1259         return (GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b));
1260 }
1261
1262 GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1263 {
1264         NNTPSession *session;
1265         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1266         guint first, last, next;
1267
1268         g_return_val_if_fail(folder != NULL, NULL);
1269         g_return_val_if_fail(folder->type == F_NEWS, NULL);
1270         g_return_val_if_fail(msgnum_list != NULL, NULL);
1271         g_return_val_if_fail(item != NULL, NULL);
1272
1273         session = news_session_get(folder);
1274         g_return_val_if_fail(session != NULL, NULL);
1275
1276         tmp_msgnum_list = g_slist_copy(msgnum_list);
1277         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, news_fetch_msgnum_sort);
1278
1279         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1280         last = first;
1281         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1282                 next = GPOINTER_TO_INT(elem->data);
1283                 if(next != (last + 1)) {
1284                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1285                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1286                         first = next;
1287                 }
1288                 last = next;
1289         }
1290         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1291         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1292
1293         g_slist_free(tmp_msgnum_list);
1294
1295         return msginfo_list;
1296 }