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 (max < first || last < min)
 396                 new = unread = total = num;
 397         else {
 398                 if (min < first)
 399                         min = first;
 400                 else if (first < min) {
 401                         num -= min - first;
 402                         first = min;
 403                 }
 404
 405                 if (last < max)
 406                         max = last;
 407                 else if (max < last) {
 408                         new += last - max;
 409                         unread += last - max;
 410                 }
 411
 412                 if (new > num) new = num;
 413                 if (unread > num) unread = num;
 414         }
 415
 416         item->new = new;
 417         item->unread = unread;
 418         item->total = num;
 419         item->last_num = last;
 420
 421         return 0;
 422 }
 423
 424 static NewsGroupInfo *news_group_info_new(const gchar *name,
 425                                           gint first, gint last, gchar type)
 426 {
 427         NewsGroupInfo *ginfo;
 428
 429         ginfo = g_new(NewsGroupInfo, 1);
 430         ginfo->name = g_strdup(name);
 431         ginfo->first = first;
 432         ginfo->last = last;
 433         ginfo->type = type;
 434
 435         return ginfo;
 436 }
 437
 438 static void news_group_info_free(NewsGroupInfo *ginfo)
 439 {
 440         g_free(ginfo->name);
 441         g_free(ginfo);
 442 }
 443
 444 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 445                                     NewsGroupInfo *ginfo2)
 446 {
 447         return g_strcasecmp(ginfo1->name, ginfo2->name);
 448 }
 449
 450 GSList *news_get_group_list(Folder *folder)
 451 {
 452         gchar *path, *filename;
 453         FILE *fp;
 454         GSList *list = NULL;
 455         GSList *last = NULL;
 456         gchar buf[NNTPBUFSIZE];
 457
 458         g_return_val_if_fail(folder != NULL, NULL);
 459         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 460
 461         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 462         if (!is_dir_exist(path))
 463                 make_dir_hier(path);
 464         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 465         g_free(path);
 466
 467         if ((fp = fopen(filename, "rb")) == NULL) {
 468                 NNTPSession *session;
 469
 470                 session = news_session_get(folder);
 471                 if (!session) {
 472                         g_free(filename);
 473                         return NULL;
 474                 }
 475
 476                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 477                         g_free(filename);
 478                         statusbar_pop_all();
 479                         return NULL;
 480                 }
 481                 statusbar_pop_all();
 482                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 483                         log_warning(_("can't retrieve newsgroup list\n"));
 484                         session_destroy(SESSION(session));
 485                         REMOTE_FOLDER(folder)->session = NULL;
 486                         g_free(filename);
 487                         return NULL;
 488                 }
 489
 490                 if ((fp = fopen(filename, "rb")) == NULL) {
 491                         FILE_OP_ERROR(filename, "fopen");
 492                         g_free(filename);
 493                         return NULL;
 494                 }
 495         }
 496
 497         while (fgets(buf, sizeof(buf), fp) != NULL) {
 498                 gchar *p = buf;
 499                 gchar *name;
 500                 gint last_num;
 501                 gint first_num;
 502                 gchar type;
 503                 NewsGroupInfo *ginfo;
 504
 505                 p = strchr(p, ' ');
 506                 if (!p) continue;
 507                 *p = '\0';
 508                 p++;
 509                 name = buf;
 510
 511                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 512                         continue;
 513
 514                 ginfo = news_group_info_new(name, first_num, last_num, type);
 515
 516                 if (!last)
 517                         last = list = g_slist_append(NULL, ginfo);
 518                 else {
 519                         last = g_slist_append(last, ginfo);
 520                         last = last->next;
 521                 }
 522         }
 523
 524         fclose(fp);
 525         g_free(filename);
 526
 527         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 528
 529         statusbar_pop_all();
 530
 531         return list;
 532 }
 533
 534 void news_group_list_free(GSList *group_list)
 535 {
 536         GSList *cur;
 537
 538         if (!group_list) return;
 539
 540         for (cur = group_list; cur != NULL; cur = cur->next)
 541                 news_group_info_free((NewsGroupInfo *)cur->data);
 542         g_slist_free(group_list);
 543 }
 544
 545 void news_remove_group_list_cache(Folder *folder)
 546 {
 547         gchar *path, *filename;
 548
 549         g_return_if_fail(folder != NULL);
 550         g_return_if_fail(folder->type == F_NEWS);
 551
 552         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 553         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 554         g_free(path);
 555
 556         if (is_file_exist(filename)) {
 557                 if (remove(filename) < 0)
 558                         FILE_OP_ERROR(filename, "remove");
 559         }
 560         g_free(filename);
 561 }
 562
 563 gint news_post(Folder *folder, const gchar *file)
 564 {
 565         NNTPSession *session;
 566         FILE *fp;
 567         gint ok;
 568
 569         g_return_val_if_fail(folder != NULL, -1);
 570         g_return_val_if_fail(folder->type == F_NEWS, -1);
 571         g_return_val_if_fail(file != NULL, -1);
 572
 573         session = news_session_get(folder);
 574         if (!session) return -1;
 575
 576         if ((fp = fopen(file, "rb")) == NULL) {
 577                 FILE_OP_ERROR(file, "fopen");
 578                 return -1;
 579         }
 580
 581         ok = nntp_post(session->nntp_sock, fp);
 582         if (ok != NN_SUCCESS) {
 583                 log_warning(_("can't post article.\n"));
 584                 return -1;
 585         }
 586
 587         fclose(fp);
 588
 589         statusbar_pop_all();
 590
 591         return 0;
 592 }
 593
 594 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 595                                  gint num, gchar *filename)
 596 {
 597         gchar *msgid;
 598
 599         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 600             != NN_SUCCESS)
 601                 return -1;
 602
 603         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 604         g_free(msgid);
 605
 606         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 607                 log_warning(_("can't retrieve article %d\n"), num);
 608                 return -1;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 615 {
 616         MsgInfo * msginfo;
 617         gchar * filename;
 618         MsgFlags msgflags = { 0, 0 };
 619         gint r;
 620
 621         filename = folder_item_fetch_msg(item, num);
 622         if (filename == NULL)
 623                 return -1;
 624
 625         msginfo = procheader_parse(filename, msgflags, FALSE, FALSE);
 626         if (msginfo == NULL)
 627                 return -1;
 628
 629         r = news_cancel_article(folder, msginfo);
 630
 631         procmsg_msginfo_free(msginfo);
 632
 633         return r;
 634 }
 635
 636 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 637 {
 638         return news_get_article_cmd(session, "ARTICLE", num, filename);
 639 }
 640
 641 static gint news_get_header(NNTPSession *session, gint num, gchar *filename)
 642 {
 643         return news_get_article_cmd(session, "HEAD", num, filename);
 644 }
 645
 646 /**
 647  * news_select_group:
 648  * @session: Active NNTP session.
 649  * @group: Newsgroup name.
 650  * @num: Estimated number of articles.
 651  * @first: First article number.
 652  * @last: Last article number.
 653  *
 654  * Select newsgroup @group with the GROUP command if it is not already
 655  * selected in @session, or article numbers need to be returned.
 656  *
 657  * Return value: NNTP result code.
 658  **/
 659 static gint news_select_group(NNTPSession *session, const gchar *group,
 660                               gint *num, gint *first, gint *last)
 661 {
 662         gint ok;
 663         gint num_, first_, last_;
 664
 665         if (!num || !first || !last) {
 666                 if (session->group && g_strcasecmp(session->group, group) == 0)
 667                         return NN_SUCCESS;
 668                 num = &num_;
 669                 first = &first_;
 670                 last = &last_;
 671         }
 672
 673         g_free(session->group);
 674         session->group = NULL;
 675
 676         ok = nntp_group(session->nntp_sock, group, num, first, last);
 677         if (ok == NN_SUCCESS)
 678                 session->group = g_strdup(group);
 679
 680         return ok;
 681 }
 682
 683 static GSList *news_get_uncached_articles(NNTPSession *session,
 684                                           FolderItem *item, gint cache_last,
 685                                           gint *rfirst, gint *rlast)
 686 {
 687         gint ok;
 688         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 689         gchar buf[NNTPBUFSIZE];
 690         GSList *newlist = NULL;
 691         GSList *llast = NULL;
 692         MsgInfo *msginfo;
 693
 694         if (rfirst) *rfirst = 0;
 695         if (rlast)  *rlast  = 0;
 696
 697         g_return_val_if_fail(session != NULL, NULL);
 698         g_return_val_if_fail(item != NULL, NULL);
 699         g_return_val_if_fail(item->folder != NULL, NULL);
 700         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 701
 702         ok = news_select_group(session, item->path, &num, &first, &last);
 703         if (ok != NN_SUCCESS) {
 704                 log_warning(_("can't set group: %s\n"), item->path);
 705                 return NULL;
 706         }
 707
 708         /* calculate getting overview range */
 709         if (first > last) {
 710                 log_warning(_("invalid article range: %d - %d\n"),
 711                             first, last);
 712                 return NULL;
 713         }
 714         if (cache_last < first)
 715                 begin = first;
 716         else if (last < cache_last)
 717                 begin = first;
 718         else if (last == cache_last) {
 719                 debug_print(_("no new articles.\n"));
 720                 return NULL;
 721         } else
 722                 begin = cache_last + 1;
 723         end = last;
 724
 725         if (rfirst) *rfirst = first;
 726         if (rlast)  *rlast  = last;
 727
 728         if (prefs_common.max_articles > 0 &&
 729             end - begin + 1 > prefs_common.max_articles)
 730                 begin = end - prefs_common.max_articles + 1;
 731
 732         log_message(_("getting xover %d - %d in %s...\n"),
 733                     begin, end, item->path);
 734         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 735                 log_warning(_("can't get xover\n"));
 736                 return NULL;
 737         }
 738
 739         for (;;) {
 740                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 741                         log_warning(_("error occurred while getting xover.\n"));
 742                         return newlist;
 743                 }
 744
 745                 if (buf[0] == '.' && buf[1] == '\r') break;
 746
 747                 msginfo = news_parse_xover(buf);
 748                 if (!msginfo) {
 749                         log_warning(_("invalid xover line: %s\n"), buf);
 750                         continue;
 751                 }
 752
 753                 msginfo->folder = item;
 754                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 755                 msginfo->flags.tmp_flags = MSG_NEWS;
 756                 msginfo->newsgroups = g_strdup(item->path);
 757
 758                 if (!newlist)
 759                         llast = newlist = g_slist_append(newlist, msginfo);
 760                 else {
 761                         llast = g_slist_append(llast, msginfo);
 762                         llast = llast->next;
 763                 }
 764         }
 765
 766         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 767                 log_warning(_("can't get xhdr\n"));
 768                 return newlist;
 769         }
 770
 771         llast = newlist;
 772
 773         for (;;) {
 774                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 775                         log_warning(_("error occurred while getting xhdr.\n"));
 776                         return newlist;
 777                 }
 778
 779                 if (buf[0] == '.' && buf[1] == '\r') break;
 780                 if (!llast) {
 781                         g_warning("llast == NULL\n");
 782                         continue;
 783                 }
 784
 785                 msginfo = (MsgInfo *)llast->data;
 786                 msginfo->to = news_parse_xhdr(buf, msginfo);
 787
 788                 llast = llast->next;
 789         }
 790
 791         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 792                 log_warning(_("can't get xhdr\n"));
 793                 return newlist;
 794         }
 795
 796         llast = newlist;
 797
 798         for (;;) {
 799                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 800                         log_warning(_("error occurred while getting xhdr.\n"));
 801                         return newlist;
 802                 }
 803
 804                 if (buf[0] == '.' && buf[1] == '\r') break;
 805                 if (!llast) {
 806                         g_warning("llast == NULL\n");
 807                         continue;
 808                 }
 809
 810                 msginfo = (MsgInfo *)llast->data;
 811                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 812
 813                 llast = llast->next;
 814         }
 815
 816         return newlist;
 817 }
 818
 819 #define PARSE_ONE_PARAM(p, srcp) \
 820 { \
 821         p = strchr(srcp, '\t'); \
 822         if (!p) return NULL; \
 823         else \
 824                 *p++ = '\0'; \
 825 }
 826
 827 static MsgInfo *news_parse_xover(const gchar *xover_str)
 828 {
 829         MsgInfo *msginfo;
 830         gchar buf[NNTPBUFSIZE];
 831         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 832         gchar *p;
 833         gint num, size_int, line_int;
 834         gchar *xover_buf;
 835
 836         Xstrdup_a(xover_buf, xover_str, return NULL);
 837
 838         PARSE_ONE_PARAM(subject, xover_buf);
 839         PARSE_ONE_PARAM(sender, subject);
 840         PARSE_ONE_PARAM(date, sender);
 841         PARSE_ONE_PARAM(msgid, date);
 842         PARSE_ONE_PARAM(ref, msgid);
 843         PARSE_ONE_PARAM(size, ref);
 844         PARSE_ONE_PARAM(line, size);
 845         PARSE_ONE_PARAM(xref, line);
 846
 847         tmp = strchr(xref, '\t');
 848         if (!tmp) tmp = strchr(line, '\r');
 849         if (!tmp) tmp = strchr(line, '\n');
 850         if (tmp) *tmp = '\0';
 851
 852         num = atoi(xover_str);
 853         size_int = atoi(size);
 854         line_int = atoi(line);
 855
 856         /* set MsgInfo */
 857         msginfo = g_new0(MsgInfo, 1);
 858         msginfo->msgnum = num;
 859         msginfo->size = size_int;
 860
 861         msginfo->date = g_strdup(date);
 862         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 863
 864         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 865         msginfo->from = g_strdup(buf);
 866         msginfo->fromname = procheader_get_fromname(buf);
 867
 868         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 869         msginfo->subject = g_strdup(buf);
 870
 871         extract_parenthesis(msgid, '<', '>');
 872         remove_space(msgid);
 873         if (*msgid != '\0')
 874                 msginfo->msgid = g_strdup(msgid);
 875
 876         msginfo->references = g_strdup(ref);
 877         eliminate_parenthesis(ref, '(', ')');
 878         if ((p = strrchr(ref, '<')) != NULL) {
 879                 extract_parenthesis(p, '<', '>');
 880                 remove_space(p);
 881                 if (*p != '\0')
 882                         msginfo->inreplyto = g_strdup(p);
 883         }
 884
 885         msginfo->xref = g_strdup(xref);
 886         p = msginfo->xref+strlen(msginfo->xref) - 1;
 887         while (*p == '\r' || *p == '\n') {
 888                 *p = '\0';
 889                 p--;
 890         }
 891
 892         return msginfo;
 893 }
 894
 895 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 896 {
 897         gchar *p;
 898         gchar *tmp;
 899         gint num;
 900
 901         p = strchr(xhdr_str, ' ');
 902         if (!p)
 903                 return NULL;
 904         else
 905                 p++;
 906
 907         num = atoi(xhdr_str);
 908         if (msginfo->msgnum != num) return NULL;
 909
 910         tmp = strchr(p, '\r');
 911         if (!tmp) tmp = strchr(p, '\n');
 912
 913         if (tmp)
 914                 return g_strndup(p, tmp - p);
 915         else
 916                 return g_strdup(p);
 917 }
 918
 919 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 920                                         gint first)
 921 {
 922         GSList *cur, *next;
 923         MsgInfo *msginfo;
 924         gchar *dir;
 925
 926         g_return_val_if_fail(item != NULL, alist);
 927         g_return_val_if_fail(item->folder != NULL, alist);
 928         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 929
 930         if (first < 2) return alist;
 931
 932         debug_print(_("Deleting cached articles 1 - %d ... "), first - 1);
 933
 934         dir = folder_item_get_path(item);
 935         remove_numbered_files(dir, 1, first - 1);
 936         g_free(dir);
 937
 938         for (cur = alist; cur != NULL; ) {
 939                 next = cur->next;
 940
 941                 msginfo = (MsgInfo *)cur->data;
 942                 if (msginfo && msginfo->msgnum < first) {
 943                         procmsg_msginfo_free(msginfo);
 944                         alist = g_slist_remove(alist, msginfo);
 945                 }
 946
 947                 cur = next;
 948         }
 949
 950         return alist;
 951 }
 952
 953 static void news_delete_all_articles(FolderItem *item)
 954 {
 955         gchar *dir;
 956
 957         g_return_if_fail(item != NULL);
 958         g_return_if_fail(item->folder != NULL);
 959         g_return_if_fail(item->folder->type == F_NEWS);
 960
 961         debug_print(_("\tDeleting all cached articles... "));
 962
 963         dir = folder_item_get_path(item);
 964         remove_all_numbered_files(dir);
 965         g_free(dir);
 966
 967         debug_print(_("done.\n"));
 968 }
 969
 970 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 971 {
 972         gchar * tmp;
 973         FILE * tmpfp;
 974         gchar buf[BUFFSIZE];
 975
 976         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 977                               G_DIR_SEPARATOR, (gint)msginfo);
 978         if (tmp == NULL)
 979                 return -1;
 980
 981         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 982                 FILE_OP_ERROR(tmp, "fopen");
 983                 return -1;
 984         }
 985         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 986                 FILE_OP_ERROR(tmp, "chmod");
 987                 g_warning(_("can't change file mode\n"));
 988         }
 989
 990         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 991         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 992         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 993         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 994         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 995         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 996         get_rfc822_date(buf, sizeof(buf));
 997         fprintf(tmpfp, "Date: %s\r\n", buf);
 998         fprintf(tmpfp, "\r\n");
 999         fprintf(tmpfp, "removed with sylpheed\r\n");
1000
1001         fclose(tmpfp);
1002
1003         news_post(folder, tmp);
1004         remove(tmp);
1005
1006         g_free(tmp);
1007
1008         return 0;
1009 }