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