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
  51 #define NNTP_PORT       119
  52 #if USE_SSL
  53 #define NNTPS_PORT 563
  54 #endif
  55
  56 static void news_folder_init             (Folder        *folder,
  57                                           const gchar   *name,
  58                                           const gchar   *path);
  59
  60 #if USE_SSL
  61 static Session *news_session_new         (const gchar   *server,
  62                                           gushort        port,
  63                                           const gchar   *userid,
  64                                           const gchar   *passwd, gboolean use_ssl);
  65 #else
  66 static Session *news_session_new         (const gchar   *server,
  67                                           gushort        port,
  68                                           const gchar   *userid,
  69                                           const gchar   *passwd);
  70 #endif
  71
  72 static gint news_get_article_cmd         (NNTPSession   *session,
  73                                           const gchar   *cmd,
  74                                           gint           num,
  75                                           gchar         *filename);
  76 static gint news_get_article             (NNTPSession   *session,
  77                                           gint           num,
  78                                           gchar         *filename);
  79 static gint news_get_header              (NNTPSession   *session,
  80                                           gint           num,
  81                                           gchar         *filename);
  82
  83 static gint news_select_group            (NNTPSession   *session,
  84                                           const gchar   *group,
  85                                           gint          *num,
  86                                           gint          *first,
  87                                           gint          *last);
  88 static GSList *news_get_uncached_articles(NNTPSession   *session,
  89                                           FolderItem    *item,
  90                                           gint           cache_last,
  91                                           gint          *rfirst,
  92                                           gint          *rlast);
  93 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  94 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
  95                                           MsgInfo       *msginfo);
  96 static GSList *news_delete_old_articles  (GSList        *alist,
  97                                           FolderItem    *item,
  98                                           gint           first);
  99 static void news_delete_all_articles     (FolderItem    *item);
 100
 101 static gint news_remove_msg              (Folder        *folder,
 102                                           FolderItem    *item,
 103                                           gint           num);
 104
 105 Folder *news_folder_new(const gchar *name, const gchar *path)
 106 {
 107         Folder *folder;
 108
 109         folder = (Folder *)g_new0(NewsFolder, 1);
 110         news_folder_init(folder, name, path);
 111
 112         return folder;
 113 }
 114
 115 void news_folder_destroy(NewsFolder *folder)
 116 {
 117         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 118 }
 119
 120 static void news_folder_init(Folder *folder, const gchar *name,
 121                              const gchar *path)
 122 {
 123         folder_remote_folder_init(folder, name, path);
 124
 125         folder->type = F_NEWS;
 126
 127         folder->get_msg_list = news_get_article_list;
 128         folder->fetch_msg    = news_fetch_msg;
 129         folder->scan         = news_scan_group;
 130         folder->remove_msg   = news_remove_msg;
 131 }
 132
 133 #if USE_SSL
 134 static Session *news_session_new(const gchar *server, gushort port,
 135                                  const gchar *userid, const gchar *passwd, gboolean use_ssl)
 136 #else
 137 static Session *news_session_new(const gchar *server, gushort port,
 138                                  const gchar *userid, const gchar *passwd)
 139 #endif
 140 {
 141         gchar buf[NNTPBUFSIZE];
 142         NNTPSession *session;
 143         NNTPSockInfo *nntp_sock;
 144
 145         g_return_val_if_fail(server != NULL, NULL);
 146
 147         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 148
 149         if (userid && passwd)
 150 #if USE_SSL
 151                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd, use_ssl);
 152 #else
 153                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd);
 154 #endif
 155         else
 156 #if USE_SSL
 157                 nntp_sock = nntp_open(server, port, buf, use_ssl);
 158 #else
 159                 nntp_sock = nntp_open(server, port, buf);
 160 #endif
 161
 162         if (nntp_sock == NULL)
 163                 return NULL;
 164
 165         session = g_new(NNTPSession, 1);
 166         SESSION(session)->type             = SESSION_NEWS;
 167         SESSION(session)->server           = g_strdup(server);
 168         session->nntp_sock                 = nntp_sock;
 169         SESSION(session)->sock             = nntp_sock->sock;
 170         SESSION(session)->connected        = TRUE;
 171         SESSION(session)->phase            = SESSION_READY;
 172         SESSION(session)->last_access_time = time(NULL);
 173         SESSION(session)->data             = NULL;
 174         session->group = NULL;
 175
 176         return SESSION(session);
 177 }
 178
 179 void news_session_destroy(NNTPSession *session)
 180 {
 181         nntp_close(session->nntp_sock);
 182         session->nntp_sock = NULL;
 183         SESSION(session)->sock = NULL;
 184
 185         g_free(session->group);
 186 }
 187
 188 static Session *news_session_new_for_folder(Folder *folder)
 189 {
 190         Session *session;
 191         PrefsAccount *ac;
 192         const gchar *userid = NULL;
 193         gchar *passwd = NULL;
 194         int port;
 195
 196         g_return_val_if_fail(folder != NULL, NULL);
 197         g_return_val_if_fail(folder->account != NULL, NULL);
 198
 199         ac = folder->account;
 200
 201 #if USE_SSL
 202         if (ac->set_nntpport) {
 203                  port = ac->nntpport;
 204         } else {
 205                  port = ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 206         }
 207 #else
 208         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 209 #endif
 210         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 211                 userid = ac->userid;
 212                 if (ac->passwd && ac->passwd[0])
 213                         passwd = g_strdup(ac->passwd);
 214                 else
 215                         passwd = input_dialog_query_password(ac->nntp_server,
 216                                                              userid);
 217         }
 218
 219 #if USE_SSL
 220         session = news_session_new(ac->nntp_server,
 221                                    port,
 222                                    userid, passwd, ac->ssl_nntp);
 223 #else
 224         session = news_session_new(ac->nntp_server,
 225                                    port,
 226                                    userid, passwd);
 227 #endif
 228         g_free(passwd);
 229
 230         return session;
 231 }
 232
 233 NNTPSession *news_session_get(Folder *folder)
 234 {
 235         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 236
 237         g_return_val_if_fail(folder != NULL, NULL);
 238         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 239         g_return_val_if_fail(folder->account != NULL, NULL);
 240
 241         if (!rfolder->session) {
 242                 rfolder->session = news_session_new_for_folder(folder);
 243                 statusbar_pop_all();
 244                 return NNTP_SESSION(rfolder->session);
 245         }
 246
 247         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 248                 rfolder->session->last_access_time = time(NULL);
 249                 statusbar_pop_all();
 250                 return NNTP_SESSION(rfolder->session);
 251         }
 252
 253         if (nntp_mode(NNTP_SESSION(rfolder->session)->nntp_sock, FALSE)
 254             != NN_SUCCESS) {
 255                 log_warning(_("NNTP connection to %s:%d has been"
 256                               " disconnected. Reconnecting...\n"),
 257                             folder->account->nntp_server,
 258                             folder->account->set_nntpport ?
 259                             folder->account->nntpport : NNTP_PORT);
 260                 session_destroy(rfolder->session);
 261                 rfolder->session = news_session_new_for_folder(folder);
 262         }
 263
 264         if (rfolder->session)
 265                 rfolder->session->last_access_time = time(NULL);
 266         statusbar_pop_all();
 267         return NNTP_SESSION(rfolder->session);
 268 }
 269
 270 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 271                               gboolean use_cache)
 272 {
 273         GSList *alist;
 274         NNTPSession *session;
 275
 276         g_return_val_if_fail(folder != NULL, NULL);
 277         g_return_val_if_fail(item != NULL, NULL);
 278         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 279
 280         session = news_session_get(folder);
 281
 282         if (!session) {
 283                 alist = procmsg_read_cache(item, FALSE);
 284                 item->last_num = procmsg_get_last_num_in_cache(alist);
 285         } else if (use_cache) {
 286                 GSList *newlist;
 287                 gint cache_last;
 288                 gint first, last;
 289
 290                 alist = procmsg_read_cache(item, FALSE);
 291
 292                 cache_last = procmsg_get_last_num_in_cache(alist);
 293                 newlist = news_get_uncached_articles
 294                         (session, item, cache_last, &first, &last);
 295                 alist = news_delete_old_articles(alist, item, first);
 296
 297                 alist = g_slist_concat(alist, newlist);
 298                 item->last_num = last;
 299         } else {
 300                 gint last;
 301
 302                 alist = news_get_uncached_articles
 303                         (session, item, 0, NULL, &last);
 304                 news_delete_all_articles(item);
 305                 item->last_num = last;
 306         }
 307
 308         procmsg_set_flags(alist, item);
 309
 310         statusbar_pop_all();
 311
 312         return alist;
 313 }
 314
 315 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 316 {
 317         gchar *path, *filename;
 318         NNTPSession *session;
 319         gint ok;
 320
 321         g_return_val_if_fail(folder != NULL, NULL);
 322         g_return_val_if_fail(item != NULL, NULL);
 323
 324         path = folder_item_get_path(item);
 325         if (!is_dir_exist(path))
 326                 make_dir_hier(path);
 327         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 328         g_free(path);
 329
 330         if (is_file_exist(filename)) {
 331                 debug_print(_("article %d has been already cached.\n"), num);
 332                 return filename;
 333         }
 334
 335         session = news_session_get(folder);
 336         if (!session) {
 337                 g_free(filename);
 338                 return NULL;
 339         }
 340
 341         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 342         statusbar_pop_all();
 343         if (ok != NN_SUCCESS) {
 344                 g_warning(_("can't select group %s\n"), item->path);
 345                 g_free(filename);
 346                 return NULL;
 347         }
 348
 349         debug_print(_("getting article %d...\n"), num);
 350         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 351                               num, filename);
 352         statusbar_pop_all();
 353         if (ok < 0) {
 354                 g_warning(_("can't read article %d\n"), num);
 355                 g_free(filename);
 356                 return NULL;
 357         }
 358
 359         return filename;
 360 }
 361
 362 gint news_scan_group(Folder *folder, FolderItem *item)
 363 {
 364         NNTPSession *session;
 365         gint num = 0, first = 0, last = 0;
 366         gint new = 0, unread = 0, total = 0;
 367         gint min = 0, max = 0;
 368         gchar *path;
 369         gint ok;
 370
 371         g_return_val_if_fail(folder != NULL, -1);
 372         g_return_val_if_fail(item != NULL, -1);
 373
 374         session = news_session_get(folder);
 375         if (!session) return -1;
 376
 377         ok = news_select_group(session, item->path, &num, &first, &last);
 378         if (ok != NN_SUCCESS) {
 379                 log_warning(_("can't set group: %s\n"), item->path);
 380                 return -1;
 381         }
 382
 383         if (num == 0) {
 384                 item->new = item->unread = item->total = item->last_num = 0;
 385                 return 0;
 386         }
 387
 388         path = folder_item_get_path(item);
 389         if (path && is_dir_exist(path)) {
 390                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 391                                      first);
 392         }
 393         g_free(path);
 394
 395         if (first < min) {
 396                 new = unread = total = num;
 397         } else if (max < first) {
 398                 new = unread = total = num;
 399         } else if (last > max) {
 400                 new += last - max;
 401                 unread += last - max;
 402                 if (new > num) new = num;
 403                 if (unread > num) unread = num;
 404         }
 405         item->new = new;
 406         item->unread = unread;
 407         item->total = num;
 408         item->last_num = last;
 409
 410         return 0;
 411 }
 412
 413 static NewsGroupInfo *news_group_info_new(const gchar *name,
 414                                           gint first, gint last, gchar type)
 415 {
 416         NewsGroupInfo *ginfo;
 417
 418         ginfo = g_new(NewsGroupInfo, 1);
 419         ginfo->name = g_strdup(name);
 420         ginfo->first = first;
 421         ginfo->last = last;
 422         ginfo->type = type;
 423
 424         return ginfo;
 425 }
 426
 427 static void news_group_info_free(NewsGroupInfo *ginfo)
 428 {
 429         g_free(ginfo->name);
 430         g_free(ginfo);
 431 }
 432
 433 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 434                                     NewsGroupInfo *ginfo2)
 435 {
 436         return g_strcasecmp(ginfo1->name, ginfo2->name);
 437 }
 438
 439 GSList *news_get_group_list(Folder *folder)
 440 {
 441         gchar *path, *filename;
 442         FILE *fp;
 443         GSList *list = NULL;
 444         GSList *last = NULL;
 445         gchar buf[NNTPBUFSIZE];
 446
 447         g_return_val_if_fail(folder != NULL, NULL);
 448         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 449
 450         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 451         if (!is_dir_exist(path))
 452                 make_dir_hier(path);
 453         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 454         g_free(path);
 455
 456         if ((fp = fopen(filename, "rb")) == NULL) {
 457                 NNTPSession *session;
 458
 459                 session = news_session_get(folder);
 460                 if (!session) {
 461                         g_free(filename);
 462                         return NULL;
 463                 }
 464
 465                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 466                         g_free(filename);
 467                         statusbar_pop_all();
 468                         return NULL;
 469                 }
 470                 statusbar_pop_all();
 471                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 472                         log_warning(_("can't retrieve newsgroup list\n"));
 473                         session_destroy(SESSION(session));
 474                         REMOTE_FOLDER(folder)->session = NULL;
 475                         g_free(filename);
 476                         return NULL;
 477                 }
 478
 479                 if ((fp = fopen(filename, "rb")) == NULL) {
 480                         FILE_OP_ERROR(filename, "fopen");
 481                         g_free(filename);
 482                         return NULL;
 483                 }
 484         }
 485
 486         while (fgets(buf, sizeof(buf), fp) != NULL) {
 487                 gchar *p = buf;
 488                 gchar *name;
 489                 gint last_num;
 490                 gint first_num;
 491                 gchar type;
 492                 NewsGroupInfo *ginfo;
 493
 494                 p = strchr(p, ' ');
 495                 if (!p) continue;
 496                 *p = '\0';
 497                 p++;
 498                 name = buf;
 499
 500                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 501                         continue;
 502
 503                 ginfo = news_group_info_new(name, first_num, last_num, type);
 504
 505                 if (!last)
 506                         last = list = g_slist_append(NULL, ginfo);
 507                 else {
 508                         last = g_slist_append(last, ginfo);
 509                         last = last->next;
 510                 }
 511         }
 512
 513         fclose(fp);
 514         g_free(filename);
 515
 516         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 517
 518         statusbar_pop_all();
 519
 520         return list;
 521 }
 522
 523 void news_group_list_free(GSList *group_list)
 524 {
 525         GSList *cur;
 526
 527         if (!group_list) return;
 528
 529         for (cur = group_list; cur != NULL; cur = cur->next)
 530                 news_group_info_free((NewsGroupInfo *)cur->data);
 531         g_slist_free(group_list);
 532 }
 533
 534 void news_remove_group_list_cache(Folder *folder)
 535 {
 536         gchar *path, *filename;
 537
 538         g_return_if_fail(folder != NULL);
 539         g_return_if_fail(folder->type == F_NEWS);
 540
 541         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 542         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 543         g_free(path);
 544
 545         if (is_file_exist(filename)) {
 546                 if (remove(filename) < 0)
 547                         FILE_OP_ERROR(filename, "remove");
 548         }
 549         g_free(filename);
 550 }
 551
 552 gint news_post(Folder *folder, const gchar *file)
 553 {
 554         NNTPSession *session;
 555         FILE *fp;
 556         gint ok;
 557
 558         g_return_val_if_fail(folder != NULL, -1);
 559         g_return_val_if_fail(folder->type == F_NEWS, -1);
 560         g_return_val_if_fail(file != NULL, -1);
 561
 562         session = news_session_get(folder);
 563         if (!session) return -1;
 564
 565         if ((fp = fopen(file, "rb")) == NULL) {
 566                 FILE_OP_ERROR(file, "fopen");
 567                 return -1;
 568         }
 569
 570         ok = nntp_post(session->nntp_sock, fp);
 571         if (ok != NN_SUCCESS) {
 572                 log_warning(_("can't post article.\n"));
 573                 return -1;
 574         }
 575
 576         fclose(fp);
 577
 578         statusbar_pop_all();
 579
 580         return 0;
 581 }
 582
 583 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 584                                  gint num, gchar *filename)
 585 {
 586         gchar *msgid;
 587
 588         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 589             != NN_SUCCESS)
 590                 return -1;
 591
 592         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 593         g_free(msgid);
 594
 595         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 596                 log_warning(_("can't retrieve article %d\n"), num);
 597                 return -1;
 598         }
 599
 600         return 0;
 601 }
 602
 603 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 604 {
 605         MsgInfo * msginfo;
 606         gchar * filename;
 607         MsgFlags msgflags = { 0, 0 };
 608         gint r;
 609
 610         filename = folder_item_fetch_msg(item, num);
 611         if (filename == NULL)
 612                 return -1;
 613
 614         msginfo = procheader_parse(filename, msgflags, FALSE, FALSE);
 615         if (msginfo == NULL)
 616                 return -1;
 617
 618         r = news_cancel_article(folder, msginfo);
 619
 620         procmsg_msginfo_free(msginfo);
 621
 622         return r;
 623 }
 624
 625 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 626 {
 627         return news_get_article_cmd(session, "ARTICLE", num, filename);
 628 }
 629
 630 static gint news_get_header(NNTPSession *session, gint num, gchar *filename)
 631 {
 632         return news_get_article_cmd(session, "HEAD", num, filename);
 633 }
 634
 635 /**
 636  * news_select_group:
 637  * @session: Active NNTP session.
 638  * @group: Newsgroup name.
 639  * @num: Estimated number of articles.
 640  * @first: First article number.
 641  * @last: Last article number.
 642  *
 643  * Select newsgroup @group with the GROUP command if it is not already
 644  * selected in @session, or article numbers need to be returned.
 645  *
 646  * Return value: NNTP result code.
 647  **/
 648 static gint news_select_group(NNTPSession *session, const gchar *group,
 649                               gint *num, gint *first, gint *last)
 650 {
 651         gint ok;
 652         gint num_, first_, last_;
 653
 654         if (!num || !first || !last) {
 655                 if (session->group && g_strcasecmp(session->group, group) == 0)
 656                         return NN_SUCCESS;
 657                 num = &num_;
 658                 first = &first_;
 659                 last = &last_;
 660         }
 661
 662         g_free(session->group);
 663         session->group = NULL;
 664
 665         ok = nntp_group(session->nntp_sock, group, num, first, last);
 666         if (ok == NN_SUCCESS)
 667                 session->group = g_strdup(group);
 668
 669         return ok;
 670 }
 671
 672 static GSList *news_get_uncached_articles(NNTPSession *session,
 673                                           FolderItem *item, gint cache_last,
 674                                           gint *rfirst, gint *rlast)
 675 {
 676         gint ok;
 677         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 678         gchar buf[NNTPBUFSIZE];
 679         GSList *newlist = NULL;
 680         GSList *llast = NULL;
 681         MsgInfo *msginfo;
 682
 683         if (rfirst) *rfirst = 0;
 684         if (rlast)  *rlast  = 0;
 685
 686         g_return_val_if_fail(session != NULL, NULL);
 687         g_return_val_if_fail(item != NULL, NULL);
 688         g_return_val_if_fail(item->folder != NULL, NULL);
 689         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 690
 691         ok = news_select_group(session, item->path, &num, &first, &last);
 692         if (ok != NN_SUCCESS) {
 693                 log_warning(_("can't set group: %s\n"), item->path);
 694                 return NULL;
 695         }
 696
 697         /* calculate getting overview range */
 698         if (first > last) {
 699                 log_warning(_("invalid article range: %d - %d\n"),
 700                             first, last);
 701                 return NULL;
 702         }
 703         if (cache_last < first)
 704                 begin = first;
 705         else if (last < cache_last)
 706                 begin = first;
 707         else if (last == cache_last) {
 708                 debug_print(_("no new articles.\n"));
 709                 return NULL;
 710         } else
 711                 begin = cache_last + 1;
 712         end = last;
 713
 714         if (rfirst) *rfirst = first;
 715         if (rlast)  *rlast  = last;
 716
 717         if (prefs_common.max_articles > 0 &&
 718             end - begin + 1 > prefs_common.max_articles)
 719                 begin = end - prefs_common.max_articles + 1;
 720
 721         log_message(_("getting xover %d - %d in %s...\n"),
 722                     begin, end, item->path);
 723         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 724                 log_warning(_("can't get xover\n"));
 725                 return NULL;
 726         }
 727
 728         for (;;) {
 729                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 730                         log_warning(_("error occurred while getting xover.\n"));
 731                         return newlist;
 732                 }
 733
 734                 if (buf[0] == '.' && buf[1] == '\r') break;
 735
 736                 msginfo = news_parse_xover(buf);
 737                 if (!msginfo) {
 738                         log_warning(_("invalid xover line: %s\n"), buf);
 739                         continue;
 740                 }
 741
 742                 msginfo->folder = item;
 743                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 744                 msginfo->flags.tmp_flags = MSG_NEWS;
 745                 msginfo->newsgroups = g_strdup(item->path);
 746
 747                 if (!newlist)
 748                         llast = newlist = g_slist_append(newlist, msginfo);
 749                 else {
 750                         llast = g_slist_append(llast, msginfo);
 751                         llast = llast->next;
 752                 }
 753         }
 754
 755         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 756                 log_warning(_("can't get xhdr\n"));
 757                 return newlist;
 758         }
 759
 760         llast = newlist;
 761
 762         for (;;) {
 763                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 764                         log_warning(_("error occurred while getting xhdr.\n"));
 765                         return newlist;
 766                 }
 767
 768                 if (buf[0] == '.' && buf[1] == '\r') break;
 769                 if (!llast) {
 770                         g_warning("llast == NULL\n");
 771                         continue;
 772                 }
 773
 774                 msginfo = (MsgInfo *)llast->data;
 775                 msginfo->to = news_parse_xhdr(buf, msginfo);
 776
 777                 llast = llast->next;
 778         }
 779
 780         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 781                 log_warning(_("can't get xhdr\n"));
 782                 return newlist;
 783         }
 784
 785         llast = newlist;
 786
 787         for (;;) {
 788                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 789                         log_warning(_("error occurred while getting xhdr.\n"));
 790                         return newlist;
 791                 }
 792
 793                 if (buf[0] == '.' && buf[1] == '\r') break;
 794                 if (!llast) {
 795                         g_warning("llast == NULL\n");
 796                         continue;
 797                 }
 798
 799                 msginfo = (MsgInfo *)llast->data;
 800                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 801
 802                 llast = llast->next;
 803         }
 804
 805         return newlist;
 806 }
 807
 808 #define PARSE_ONE_PARAM(p, srcp) \
 809 { \
 810         p = strchr(srcp, '\t'); \
 811         if (!p) return NULL; \
 812         else \
 813                 *p++ = '\0'; \
 814 }
 815
 816 static MsgInfo *news_parse_xover(const gchar *xover_str)
 817 {
 818         MsgInfo *msginfo;
 819         gchar buf[NNTPBUFSIZE];
 820         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 821         gchar *p;
 822         gint num, size_int, line_int;
 823         gchar *xover_buf;
 824
 825         Xstrdup_a(xover_buf, xover_str, return NULL);
 826
 827         PARSE_ONE_PARAM(subject, xover_buf);
 828         PARSE_ONE_PARAM(sender, subject);
 829         PARSE_ONE_PARAM(date, sender);
 830         PARSE_ONE_PARAM(msgid, date);
 831         PARSE_ONE_PARAM(ref, msgid);
 832         PARSE_ONE_PARAM(size, ref);
 833         PARSE_ONE_PARAM(line, size);
 834         PARSE_ONE_PARAM(xref, line);
 835
 836         tmp = strchr(xref, '\t');
 837         if (!tmp) tmp = strchr(line, '\r');
 838         if (!tmp) tmp = strchr(line, '\n');
 839         if (tmp) *tmp = '\0';
 840
 841         num = atoi(xover_str);
 842         size_int = atoi(size);
 843         line_int = atoi(line);
 844
 845         /* set MsgInfo */
 846         msginfo = g_new0(MsgInfo, 1);
 847         msginfo->msgnum = num;
 848         msginfo->size = size_int;
 849
 850         msginfo->date = g_strdup(date);
 851         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 852
 853         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 854         msginfo->from = g_strdup(buf);
 855         msginfo->fromname = procheader_get_fromname(buf);
 856
 857         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 858         msginfo->subject = g_strdup(buf);
 859
 860         extract_parenthesis(msgid, '<', '>');
 861         remove_space(msgid);
 862         if (*msgid != '\0')
 863                 msginfo->msgid = g_strdup(msgid);
 864
 865         msginfo->references = g_strdup(ref);
 866         eliminate_parenthesis(ref, '(', ')');
 867         if ((p = strrchr(ref, '<')) != NULL) {
 868                 extract_parenthesis(p, '<', '>');
 869                 remove_space(p);
 870                 if (*p != '\0')
 871                         msginfo->inreplyto = g_strdup(p);
 872         }
 873
 874         msginfo->xref = g_strdup(xref);
 875         p = msginfo->xref+strlen(msginfo->xref) - 1;
 876         while (*p == '\r' || *p == '\n') {
 877                 *p = '\0';
 878                 p--;
 879         }
 880
 881         return msginfo;
 882 }
 883
 884 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 885 {
 886         gchar *p;
 887         gchar *tmp;
 888         gint num;
 889
 890         p = strchr(xhdr_str, ' ');
 891         if (!p)
 892                 return NULL;
 893         else
 894                 p++;
 895
 896         num = atoi(xhdr_str);
 897         if (msginfo->msgnum != num) return NULL;
 898
 899         tmp = strchr(p, '\r');
 900         if (!tmp) tmp = strchr(p, '\n');
 901
 902         if (tmp)
 903                 return g_strndup(p, tmp - p);
 904         else
 905                 return g_strdup(p);
 906 }
 907
 908 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 909                                         gint first)
 910 {
 911         GSList *cur, *next;
 912         MsgInfo *msginfo;
 913         gchar *dir;
 914
 915         g_return_val_if_fail(item != NULL, alist);
 916         g_return_val_if_fail(item->folder != NULL, alist);
 917         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 918
 919         if (first < 2) return alist;
 920
 921         debug_print(_("Deleting cached articles 1 - %d ... "), first - 1);
 922
 923         dir = folder_item_get_path(item);
 924         remove_numbered_files(dir, 1, first - 1);
 925         g_free(dir);
 926
 927         for (cur = alist; cur != NULL; ) {
 928                 next = cur->next;
 929
 930                 msginfo = (MsgInfo *)cur->data;
 931                 if (msginfo && msginfo->msgnum < first) {
 932                         procmsg_msginfo_free(msginfo);
 933                         alist = g_slist_remove(alist, msginfo);
 934                 }
 935
 936                 cur = next;
 937         }
 938
 939         return alist;
 940 }
 941
 942 static void news_delete_all_articles(FolderItem *item)
 943 {
 944         gchar *dir;
 945
 946         g_return_if_fail(item != NULL);
 947         g_return_if_fail(item->folder != NULL);
 948         g_return_if_fail(item->folder->type == F_NEWS);
 949
 950         debug_print(_("\tDeleting all cached articles... "));
 951
 952         dir = folder_item_get_path(item);
 953         remove_all_numbered_files(dir);
 954         g_free(dir);
 955
 956         debug_print(_("done.\n"));
 957 }
 958
 959 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 960 {
 961         gchar * tmp;
 962         FILE * tmpfp;
 963         gchar buf[BUFFSIZE];
 964
 965         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 966                               G_DIR_SEPARATOR, (gint)msginfo);
 967         if (tmp == NULL)
 968                 return -1;
 969
 970         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 971                 FILE_OP_ERROR(tmp, "fopen");
 972                 return -1;
 973         }
 974         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 975                 FILE_OP_ERROR(tmp, "chmod");
 976                 g_warning(_("can't change file mode\n"));
 977         }
 978
 979         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 980         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 981         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 982         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 983         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 984         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 985         get_rfc822_date(buf, sizeof(buf));
 986         fprintf(tmpfp, "Date: %s\r\n", buf);
 987         fprintf(tmpfp, "\r\n");
 988         fprintf(tmpfp, "removed with sylpheed\r\n");
 989
 990         fclose(tmpfp);
 991
 992         news_post(folder, tmp);
 993         remove(tmp);
 994
 995         g_free(tmp);
 996
 997         return 0;
 998 }