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 #if USE_SSL
  51 #  include "ssl.h"
  52 #endif
  53
  54 #define NNTP_PORT       119
  55 #if USE_SSL
  56 #define NNTPS_PORT      563
  57 #endif
  58
  59 static void news_folder_init             (Folder        *folder,
  60                                           const gchar   *name,
  61                                           const gchar   *path);
  62
  63 #if USE_SSL
  64 static Session *news_session_new         (const gchar   *server,
  65                                           gushort        port,
  66                                           const gchar   *userid,
  67                                           const gchar   *passwd,
  68                                           SSLType        ssl_type);
  69 #else
  70 static Session *news_session_new         (const gchar   *server,
  71                                           gushort        port,
  72                                           const gchar   *userid,
  73                                           const gchar   *passwd);
  74 #endif
  75
  76 static gint news_get_article_cmd         (NNTPSession   *session,
  77                                           const gchar   *cmd,
  78                                           gint           num,
  79                                           gchar         *filename);
  80 static gint news_get_article             (NNTPSession   *session,
  81                                           gint           num,
  82                                           gchar         *filename);
  83 static gint news_get_header              (NNTPSession   *session,
  84                                           gint           num,
  85                                           gchar         *filename);
  86
  87 static gint news_select_group            (NNTPSession   *session,
  88                                           const gchar   *group,
  89                                           gint          *num,
  90                                           gint          *first,
  91                                           gint          *last);
  92 static GSList *news_get_uncached_articles(NNTPSession   *session,
  93                                           FolderItem    *item,
  94                                           gint           cache_last,
  95                                           gint          *rfirst,
  96                                           gint          *rlast);
  97 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  98 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
  99                                           MsgInfo       *msginfo);
 100 static GSList *news_delete_old_articles  (GSList        *alist,
 101                                           FolderItem    *item,
 102                                           gint           first);
 103 static void news_delete_all_articles     (FolderItem    *item);
 104
 105 static gint news_remove_msg              (Folder        *folder,
 106                                           FolderItem    *item,
 107                                           gint           num);
 108
 109 Folder *news_folder_new(const gchar *name, const gchar *path)
 110 {
 111         Folder *folder;
 112
 113         folder = (Folder *)g_new0(NewsFolder, 1);
 114         news_folder_init(folder, name, path);
 115
 116         return folder;
 117 }
 118
 119 void news_folder_destroy(NewsFolder *folder)
 120 {
 121         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 122 }
 123
 124 static void news_folder_init(Folder *folder, const gchar *name,
 125                              const gchar *path)
 126 {
 127         folder_remote_folder_init(folder, name, path);
 128
 129         folder->type = F_NEWS;
 130
 131         folder->get_msg_list = news_get_article_list;
 132         folder->fetch_msg    = news_fetch_msg;
 133         folder->scan         = news_scan_group;
 134         folder->remove_msg   = news_remove_msg;
 135 }
 136
 137 #if USE_SSL
 138 static Session *news_session_new(const gchar *server, gushort port,
 139                                  const gchar *userid, const gchar *passwd,
 140                                  SSLType ssl_type)
 141 #else
 142 static Session *news_session_new(const gchar *server, gushort port,
 143                                  const gchar *userid, const gchar *passwd)
 144 #endif
 145 {
 146         gchar buf[NNTPBUFSIZE];
 147         NNTPSession *session;
 148         NNTPSockInfo *nntp_sock;
 149
 150         g_return_val_if_fail(server != NULL, NULL);
 151
 152         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 153
 154 #if USE_SSL
 155         if (userid && passwd)
 156                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd,
 157                                            ssl_type);
 158         else
 159                 nntp_sock = nntp_open(server, port, buf, ssl_type);
 160 #else
 161         if (userid && passwd)
 162                 nntp_sock = nntp_open_auth(server, port, buf, userid, passwd);
 163         else
 164                 nntp_sock = nntp_open(server, port, buf);
 165 #endif
 166
 167         if (nntp_sock == NULL)
 168                 return NULL;
 169
 170         session = g_new(NNTPSession, 1);
 171         SESSION(session)->type             = SESSION_NEWS;
 172         SESSION(session)->server           = g_strdup(server);
 173         session->nntp_sock                 = nntp_sock;
 174         SESSION(session)->sock             = nntp_sock->sock;
 175         SESSION(session)->connected        = TRUE;
 176         SESSION(session)->phase            = SESSION_READY;
 177         SESSION(session)->last_access_time = time(NULL);
 178         SESSION(session)->data             = NULL;
 179         session->group = NULL;
 180
 181         return SESSION(session);
 182 }
 183
 184 void news_session_destroy(NNTPSession *session)
 185 {
 186         nntp_close(session->nntp_sock);
 187         session->nntp_sock = NULL;
 188         SESSION(session)->sock = NULL;
 189
 190         g_free(session->group);
 191 }
 192
 193 static Session *news_session_new_for_folder(Folder *folder)
 194 {
 195         Session *session;
 196         PrefsAccount *ac;
 197         const gchar *userid = NULL;
 198         gchar *passwd = NULL;
 199         gushort port;
 200
 201         g_return_val_if_fail(folder != NULL, NULL);
 202         g_return_val_if_fail(folder->account != NULL, NULL);
 203
 204         ac = folder->account;
 205         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 206                 userid = ac->userid;
 207                 if (ac->passwd && ac->passwd[0])
 208                         passwd = g_strdup(ac->passwd);
 209                 else
 210                         passwd = input_dialog_query_password(ac->nntp_server,
 211                                                              userid);
 212         }
 213
 214 #if USE_SSL
 215         port = ac->set_nntpport ? ac->nntpport
 216                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 217         session = news_session_new(ac->nntp_server, port, userid, passwd,
 218                                    ac->ssl_nntp);
 219 #else
 220         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 221         session = news_session_new(ac->nntp_server, port, userid, passwd);
 222 #endif
 223
 224         g_free(passwd);
 225
 226         return session;
 227 }
 228
 229 NNTPSession *news_session_get(Folder *folder)
 230 {
 231         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 232
 233         g_return_val_if_fail(folder != NULL, NULL);
 234         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 235         g_return_val_if_fail(folder->account != NULL, NULL);
 236
 237         if (!rfolder->session) {
 238                 rfolder->session = news_session_new_for_folder(folder);
 239                 statusbar_pop_all();
 240                 return NNTP_SESSION(rfolder->session);
 241         }
 242
 243         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 244                 rfolder->session->last_access_time = time(NULL);
 245                 statusbar_pop_all();
 246                 return NNTP_SESSION(rfolder->session);
 247         }
 248
 249         if (nntp_mode(NNTP_SESSION(rfolder->session)->nntp_sock, FALSE)
 250             != NN_SUCCESS) {
 251                 log_warning(_("NNTP connection to %s:%d has been"
 252                               " disconnected. Reconnecting...\n"),
 253                             folder->account->nntp_server,
 254                             folder->account->set_nntpport ?
 255                             folder->account->nntpport : NNTP_PORT);
 256                 session_destroy(rfolder->session);
 257                 rfolder->session = news_session_new_for_folder(folder);
 258         }
 259
 260         if (rfolder->session)
 261                 rfolder->session->last_access_time = time(NULL);
 262         statusbar_pop_all();
 263         return NNTP_SESSION(rfolder->session);
 264 }
 265
 266 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 267                               gboolean use_cache)
 268 {
 269         GSList *alist;
 270         NNTPSession *session;
 271
 272         g_return_val_if_fail(folder != NULL, NULL);
 273         g_return_val_if_fail(item != NULL, NULL);
 274         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 275
 276         session = news_session_get(folder);
 277
 278         if (!session) {
 279                 alist = procmsg_read_cache(item, FALSE);
 280                 item->last_num = procmsg_get_last_num_in_cache(alist);
 281         } else if (use_cache) {
 282                 GSList *newlist;
 283                 gint cache_last;
 284                 gint first, last;
 285
 286                 alist = procmsg_read_cache(item, FALSE);
 287
 288                 cache_last = procmsg_get_last_num_in_cache(alist);
 289                 newlist = news_get_uncached_articles
 290                         (session, item, cache_last, &first, &last);
 291                 alist = news_delete_old_articles(alist, item, first);
 292
 293                 alist = g_slist_concat(alist, newlist);
 294                 item->last_num = last;
 295         } else {
 296                 gint last;
 297
 298                 alist = news_get_uncached_articles
 299                         (session, item, 0, NULL, &last);
 300                 news_delete_all_articles(item);
 301                 item->last_num = last;
 302         }
 303
 304         procmsg_set_flags(alist, item);
 305
 306         statusbar_pop_all();
 307
 308         return alist;
 309 }
 310
 311 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 312 {
 313         gchar *path, *filename;
 314         NNTPSession *session;
 315         gint ok;
 316
 317         g_return_val_if_fail(folder != NULL, NULL);
 318         g_return_val_if_fail(item != NULL, NULL);
 319
 320         path = folder_item_get_path(item);
 321         if (!is_dir_exist(path))
 322                 make_dir_hier(path);
 323         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 324         g_free(path);
 325
 326         if (is_file_exist(filename)) {
 327                 debug_print(_("article %d has been already cached.\n"), num);
 328                 return filename;
 329         }
 330
 331         session = news_session_get(folder);
 332         if (!session) {
 333                 g_free(filename);
 334                 return NULL;
 335         }
 336
 337         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 338         statusbar_pop_all();
 339         if (ok != NN_SUCCESS) {
 340                 g_warning(_("can't select group %s\n"), item->path);
 341                 g_free(filename);
 342                 return NULL;
 343         }
 344
 345         debug_print(_("getting article %d...\n"), num);
 346         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 347                               num, filename);
 348         statusbar_pop_all();
 349         if (ok < 0) {
 350                 g_warning(_("can't read article %d\n"), num);
 351                 g_free(filename);
 352                 return NULL;
 353         }
 354
 355         return filename;
 356 }
 357
 358 gint news_scan_group(Folder *folder, FolderItem *item)
 359 {
 360         NNTPSession *session;
 361         gint num = 0, first = 0, last = 0;
 362         gint new = 0, unread = 0, total = 0;
 363         gint min = 0, max = 0;
 364         gchar *path;
 365         gint ok;
 366
 367         g_return_val_if_fail(folder != NULL, -1);
 368         g_return_val_if_fail(item != NULL, -1);
 369
 370         session = news_session_get(folder);
 371         if (!session) return -1;
 372
 373         ok = news_select_group(session, item->path, &num, &first, &last);
 374         if (ok != NN_SUCCESS) {
 375                 log_warning(_("can't set group: %s\n"), item->path);
 376                 return -1;
 377         }
 378
 379         if (num == 0) {
 380                 item->new = item->unread = item->total = item->last_num = 0;
 381                 return 0;
 382         }
 383
 384         path = folder_item_get_path(item);
 385         if (path && is_dir_exist(path)) {
 386                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 387                                      first);
 388         }
 389         g_free(path);
 390
 391         if (max < first || last < min)
 392                 new = unread = total = num;
 393         else {
 394                 if (min < first)
 395                         min = first;
 396                 else if (first < min) {
 397                         num -= min - first;
 398                         first = min;
 399                 }
 400
 401                 if (last < max)
 402                         max = last;
 403                 else if (max < last) {
 404                         new += last - max;
 405                         unread += last - max;
 406                 }
 407
 408                 if (new > num) new = num;
 409                 if (unread > num) unread = num;
 410         }
 411
 412         item->new = new;
 413         item->unread = unread;
 414         item->total = num;
 415         item->last_num = last;
 416
 417         return 0;
 418 }
 419
 420 static NewsGroupInfo *news_group_info_new(const gchar *name,
 421                                           gint first, gint last, gchar type)
 422 {
 423         NewsGroupInfo *ginfo;
 424
 425         ginfo = g_new(NewsGroupInfo, 1);
 426         ginfo->name = g_strdup(name);
 427         ginfo->first = first;
 428         ginfo->last = last;
 429         ginfo->type = type;
 430
 431         return ginfo;
 432 }
 433
 434 static void news_group_info_free(NewsGroupInfo *ginfo)
 435 {
 436         g_free(ginfo->name);
 437         g_free(ginfo);
 438 }
 439
 440 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 441                                     NewsGroupInfo *ginfo2)
 442 {
 443         return g_strcasecmp(ginfo1->name, ginfo2->name);
 444 }
 445
 446 GSList *news_get_group_list(Folder *folder)
 447 {
 448         gchar *path, *filename;
 449         FILE *fp;
 450         GSList *list = NULL;
 451         GSList *last = NULL;
 452         gchar buf[NNTPBUFSIZE];
 453
 454         g_return_val_if_fail(folder != NULL, NULL);
 455         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 456
 457         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 458         if (!is_dir_exist(path))
 459                 make_dir_hier(path);
 460         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 461         g_free(path);
 462
 463         if ((fp = fopen(filename, "rb")) == NULL) {
 464                 NNTPSession *session;
 465
 466                 session = news_session_get(folder);
 467                 if (!session) {
 468                         g_free(filename);
 469                         return NULL;
 470                 }
 471
 472                 if (nntp_list(session->nntp_sock) != NN_SUCCESS) {
 473                         g_free(filename);
 474                         statusbar_pop_all();
 475                         return NULL;
 476                 }
 477                 statusbar_pop_all();
 478                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 479                         log_warning(_("can't retrieve newsgroup list\n"));
 480                         session_destroy(SESSION(session));
 481                         REMOTE_FOLDER(folder)->session = NULL;
 482                         g_free(filename);
 483                         return NULL;
 484                 }
 485
 486                 if ((fp = fopen(filename, "rb")) == NULL) {
 487                         FILE_OP_ERROR(filename, "fopen");
 488                         g_free(filename);
 489                         return NULL;
 490                 }
 491         }
 492
 493         while (fgets(buf, sizeof(buf), fp) != NULL) {
 494                 gchar *p = buf;
 495                 gchar *name;
 496                 gint last_num;
 497                 gint first_num;
 498                 gchar type;
 499                 NewsGroupInfo *ginfo;
 500
 501                 p = strchr(p, ' ');
 502                 if (!p) continue;
 503                 *p = '\0';
 504                 p++;
 505                 name = buf;
 506
 507                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 508                         continue;
 509
 510                 ginfo = news_group_info_new(name, first_num, last_num, type);
 511
 512                 if (!last)
 513                         last = list = g_slist_append(NULL, ginfo);
 514                 else {
 515                         last = g_slist_append(last, ginfo);
 516                         last = last->next;
 517                 }
 518         }
 519
 520         fclose(fp);
 521         g_free(filename);
 522
 523         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 524
 525         statusbar_pop_all();
 526
 527         return list;
 528 }
 529
 530 void news_group_list_free(GSList *group_list)
 531 {
 532         GSList *cur;
 533
 534         if (!group_list) return;
 535
 536         for (cur = group_list; cur != NULL; cur = cur->next)
 537                 news_group_info_free((NewsGroupInfo *)cur->data);
 538         g_slist_free(group_list);
 539 }
 540
 541 void news_remove_group_list_cache(Folder *folder)
 542 {
 543         gchar *path, *filename;
 544
 545         g_return_if_fail(folder != NULL);
 546         g_return_if_fail(folder->type == F_NEWS);
 547
 548         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 549         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 550         g_free(path);
 551
 552         if (is_file_exist(filename)) {
 553                 if (remove(filename) < 0)
 554                         FILE_OP_ERROR(filename, "remove");
 555         }
 556         g_free(filename);
 557 }
 558
 559 gint news_post(Folder *folder, const gchar *file)
 560 {
 561         NNTPSession *session;
 562         FILE *fp;
 563         gint ok;
 564
 565         g_return_val_if_fail(folder != NULL, -1);
 566         g_return_val_if_fail(folder->type == F_NEWS, -1);
 567         g_return_val_if_fail(file != NULL, -1);
 568
 569         session = news_session_get(folder);
 570         if (!session) return -1;
 571
 572         if ((fp = fopen(file, "rb")) == NULL) {
 573                 FILE_OP_ERROR(file, "fopen");
 574                 return -1;
 575         }
 576
 577         ok = nntp_post(session->nntp_sock, fp);
 578         if (ok != NN_SUCCESS) {
 579                 log_warning(_("can't post article.\n"));
 580                 return -1;
 581         }
 582
 583         fclose(fp);
 584
 585         statusbar_pop_all();
 586
 587         return 0;
 588 }
 589
 590 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 591                                  gint num, gchar *filename)
 592 {
 593         gchar *msgid;
 594
 595         if (nntp_get_article(session->nntp_sock, cmd, num, &msgid)
 596             != NN_SUCCESS)
 597                 return -1;
 598
 599         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 600         g_free(msgid);
 601
 602         if (recv_write_to_file(session->nntp_sock->sock, filename) < 0) {
 603                 log_warning(_("can't retrieve article %d\n"), num);
 604                 return -1;
 605         }
 606
 607         return 0;
 608 }
 609
 610 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 611 {
 612         MsgInfo * msginfo;
 613         gchar * filename;
 614         MsgFlags msgflags = { 0, 0 };
 615         gint r;
 616
 617         filename = folder_item_fetch_msg(item, num);
 618         if (filename == NULL)
 619                 return -1;
 620
 621         msginfo = procheader_parse_file(filename, msgflags, FALSE, FALSE);
 622         if (msginfo == NULL)
 623                 return -1;
 624
 625         r = news_cancel_article(folder, msginfo);
 626
 627         procmsg_msginfo_free(msginfo);
 628
 629         return r;
 630 }
 631
 632 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 633 {
 634         return news_get_article_cmd(session, "ARTICLE", num, filename);
 635 }
 636
 637 static gint news_get_header(NNTPSession *session, gint num, gchar *filename)
 638 {
 639         return news_get_article_cmd(session, "HEAD", num, filename);
 640 }
 641
 642 /**
 643  * news_select_group:
 644  * @session: Active NNTP session.
 645  * @group: Newsgroup name.
 646  * @num: Estimated number of articles.
 647  * @first: First article number.
 648  * @last: Last article number.
 649  *
 650  * Select newsgroup @group with the GROUP command if it is not already
 651  * selected in @session, or article numbers need to be returned.
 652  *
 653  * Return value: NNTP result code.
 654  **/
 655 static gint news_select_group(NNTPSession *session, const gchar *group,
 656                               gint *num, gint *first, gint *last)
 657 {
 658         gint ok;
 659         gint num_, first_, last_;
 660
 661         if (!num || !first || !last) {
 662                 if (session->group && g_strcasecmp(session->group, group) == 0)
 663                         return NN_SUCCESS;
 664                 num = &num_;
 665                 first = &first_;
 666                 last = &last_;
 667         }
 668
 669         g_free(session->group);
 670         session->group = NULL;
 671
 672         ok = nntp_group(session->nntp_sock, group, num, first, last);
 673         if (ok == NN_SUCCESS)
 674                 session->group = g_strdup(group);
 675
 676         return ok;
 677 }
 678
 679 static GSList *news_get_uncached_articles(NNTPSession *session,
 680                                           FolderItem *item, gint cache_last,
 681                                           gint *rfirst, gint *rlast)
 682 {
 683         gint ok;
 684         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 685         gchar buf[NNTPBUFSIZE];
 686         GSList *newlist = NULL;
 687         GSList *llast = NULL;
 688         MsgInfo *msginfo;
 689
 690         if (rfirst) *rfirst = 0;
 691         if (rlast)  *rlast  = 0;
 692
 693         g_return_val_if_fail(session != NULL, NULL);
 694         g_return_val_if_fail(item != NULL, NULL);
 695         g_return_val_if_fail(item->folder != NULL, NULL);
 696         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 697
 698         ok = news_select_group(session, item->path, &num, &first, &last);
 699         if (ok != NN_SUCCESS) {
 700                 log_warning(_("can't set group: %s\n"), item->path);
 701                 return NULL;
 702         }
 703
 704         /* calculate getting overview range */
 705         if (first > last) {
 706                 log_warning(_("invalid article range: %d - %d\n"),
 707                             first, last);
 708                 return NULL;
 709         }
 710         if (cache_last < first)
 711                 begin = first;
 712         else if (last < cache_last)
 713                 begin = first;
 714         else if (last == cache_last) {
 715                 debug_print(_("no new articles.\n"));
 716                 return NULL;
 717         } else
 718                 begin = cache_last + 1;
 719         end = last;
 720
 721         if (rfirst) *rfirst = first;
 722         if (rlast)  *rlast  = last;
 723
 724         if (prefs_common.max_articles > 0 &&
 725             end - begin + 1 > prefs_common.max_articles)
 726                 begin = end - prefs_common.max_articles + 1;
 727
 728         log_message(_("getting xover %d - %d in %s...\n"),
 729                     begin, end, item->path);
 730         if (nntp_xover(session->nntp_sock, begin, end) != NN_SUCCESS) {
 731                 log_warning(_("can't get xover\n"));
 732                 return NULL;
 733         }
 734
 735         for (;;) {
 736                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 737                         log_warning(_("error occurred while getting xover.\n"));
 738                         return newlist;
 739                 }
 740
 741                 if (buf[0] == '.' && buf[1] == '\r') break;
 742
 743                 msginfo = news_parse_xover(buf);
 744                 if (!msginfo) {
 745                         log_warning(_("invalid xover line: %s\n"), buf);
 746                         continue;
 747                 }
 748
 749                 msginfo->folder = item;
 750                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 751                 msginfo->flags.tmp_flags = MSG_NEWS;
 752                 msginfo->newsgroups = g_strdup(item->path);
 753
 754                 if (!newlist)
 755                         llast = newlist = g_slist_append(newlist, msginfo);
 756                 else {
 757                         llast = g_slist_append(llast, msginfo);
 758                         llast = llast->next;
 759                 }
 760         }
 761
 762         if (nntp_xhdr(session->nntp_sock, "to", begin, end) != NN_SUCCESS) {
 763                 log_warning(_("can't get xhdr\n"));
 764                 return newlist;
 765         }
 766
 767         llast = newlist;
 768
 769         for (;;) {
 770                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 771                         log_warning(_("error occurred while getting xhdr.\n"));
 772                         return newlist;
 773                 }
 774
 775                 if (buf[0] == '.' && buf[1] == '\r') break;
 776                 if (!llast) {
 777                         g_warning("llast == NULL\n");
 778                         continue;
 779                 }
 780
 781                 msginfo = (MsgInfo *)llast->data;
 782                 msginfo->to = news_parse_xhdr(buf, msginfo);
 783
 784                 llast = llast->next;
 785         }
 786
 787         if (nntp_xhdr(session->nntp_sock, "cc", begin, end) != NN_SUCCESS) {
 788                 log_warning(_("can't get xhdr\n"));
 789                 return newlist;
 790         }
 791
 792         llast = newlist;
 793
 794         for (;;) {
 795                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 796                         log_warning(_("error occurred while getting xhdr.\n"));
 797                         return newlist;
 798                 }
 799
 800                 if (buf[0] == '.' && buf[1] == '\r') break;
 801                 if (!llast) {
 802                         g_warning("llast == NULL\n");
 803                         continue;
 804                 }
 805
 806                 msginfo = (MsgInfo *)llast->data;
 807                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 808
 809                 llast = llast->next;
 810         }
 811
 812         return newlist;
 813 }
 814
 815 #define PARSE_ONE_PARAM(p, srcp) \
 816 { \
 817         p = strchr(srcp, '\t'); \
 818         if (!p) return NULL; \
 819         else \
 820                 *p++ = '\0'; \
 821 }
 822
 823 static MsgInfo *news_parse_xover(const gchar *xover_str)
 824 {
 825         MsgInfo *msginfo;
 826         gchar buf[NNTPBUFSIZE];
 827         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 828         gchar *p;
 829         gint num, size_int, line_int;
 830         gchar *xover_buf;
 831
 832         Xstrdup_a(xover_buf, xover_str, return NULL);
 833
 834         PARSE_ONE_PARAM(subject, xover_buf);
 835         PARSE_ONE_PARAM(sender, subject);
 836         PARSE_ONE_PARAM(date, sender);
 837         PARSE_ONE_PARAM(msgid, date);
 838         PARSE_ONE_PARAM(ref, msgid);
 839         PARSE_ONE_PARAM(size, ref);
 840         PARSE_ONE_PARAM(line, size);
 841         PARSE_ONE_PARAM(xref, line);
 842
 843         tmp = strchr(xref, '\t');
 844         if (!tmp) tmp = strchr(line, '\r');
 845         if (!tmp) tmp = strchr(line, '\n');
 846         if (tmp) *tmp = '\0';
 847
 848         num = atoi(xover_str);
 849         size_int = atoi(size);
 850         line_int = atoi(line);
 851
 852         /* set MsgInfo */
 853         msginfo = g_new0(MsgInfo, 1);
 854         msginfo->msgnum = num;
 855         msginfo->size = size_int;
 856
 857         msginfo->date = g_strdup(date);
 858         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 859
 860         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 861         msginfo->from = g_strdup(buf);
 862         msginfo->fromname = procheader_get_fromname(buf);
 863
 864         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 865         msginfo->subject = g_strdup(buf);
 866
 867         extract_parenthesis(msgid, '<', '>');
 868         remove_space(msgid);
 869         if (*msgid != '\0')
 870                 msginfo->msgid = g_strdup(msgid);
 871
 872         msginfo->references = g_strdup(ref);
 873         eliminate_parenthesis(ref, '(', ')');
 874         if ((p = strrchr(ref, '<')) != NULL) {
 875                 extract_parenthesis(p, '<', '>');
 876                 remove_space(p);
 877                 if (*p != '\0')
 878                         msginfo->inreplyto = g_strdup(p);
 879         }
 880
 881         msginfo->xref = g_strdup(xref);
 882         p = msginfo->xref+strlen(msginfo->xref) - 1;
 883         while (*p == '\r' || *p == '\n') {
 884                 *p = '\0';
 885                 p--;
 886         }
 887
 888         return msginfo;
 889 }
 890
 891 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 892 {
 893         gchar *p;
 894         gchar *tmp;
 895         gint num;
 896
 897         p = strchr(xhdr_str, ' ');
 898         if (!p)
 899                 return NULL;
 900         else
 901                 p++;
 902
 903         num = atoi(xhdr_str);
 904         if (msginfo->msgnum != num) return NULL;
 905
 906         tmp = strchr(p, '\r');
 907         if (!tmp) tmp = strchr(p, '\n');
 908
 909         if (tmp)
 910                 return g_strndup(p, tmp - p);
 911         else
 912                 return g_strdup(p);
 913 }
 914
 915 static GSList *news_delete_old_articles(GSList *alist, FolderItem *item,
 916                                         gint first)
 917 {
 918         GSList *cur, *next;
 919         MsgInfo *msginfo;
 920         gchar *dir;
 921
 922         g_return_val_if_fail(item != NULL, alist);
 923         g_return_val_if_fail(item->folder != NULL, alist);
 924         g_return_val_if_fail(item->folder->type == F_NEWS, alist);
 925
 926         if (first < 2) return alist;
 927
 928         debug_print(_("Deleting cached articles 1 - %d ... "), first - 1);
 929
 930         dir = folder_item_get_path(item);
 931         remove_numbered_files(dir, 1, first - 1);
 932         g_free(dir);
 933
 934         for (cur = alist; cur != NULL; ) {
 935                 next = cur->next;
 936
 937                 msginfo = (MsgInfo *)cur->data;
 938                 if (msginfo && msginfo->msgnum < first) {
 939                         procmsg_msginfo_free(msginfo);
 940                         alist = g_slist_remove(alist, msginfo);
 941                 }
 942
 943                 cur = next;
 944         }
 945
 946         return alist;
 947 }
 948
 949 static void news_delete_all_articles(FolderItem *item)
 950 {
 951         gchar *dir;
 952
 953         g_return_if_fail(item != NULL);
 954         g_return_if_fail(item->folder != NULL);
 955         g_return_if_fail(item->folder->type == F_NEWS);
 956
 957         debug_print(_("\tDeleting all cached articles... "));
 958
 959         dir = folder_item_get_path(item);
 960         remove_all_numbered_files(dir);
 961         g_free(dir);
 962
 963         debug_print(_("done.\n"));
 964 }
 965
 966 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 967 {
 968         gchar * tmp;
 969         FILE * tmpfp;
 970         gchar buf[BUFFSIZE];
 971
 972         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 973                               G_DIR_SEPARATOR, (gint)msginfo);
 974         if (tmp == NULL)
 975                 return -1;
 976
 977         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 978                 FILE_OP_ERROR(tmp, "fopen");
 979                 return -1;
 980         }
 981         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 982                 FILE_OP_ERROR(tmp, "chmod");
 983                 g_warning(_("can't change file mode\n"));
 984         }
 985
 986         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 987         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 988         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 989         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 990         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 991         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 992         get_rfc822_date(buf, sizeof(buf));
 993         fprintf(tmpfp, "Date: %s\r\n", buf);
 994         fprintf(tmpfp, "\r\n");
 995         fprintf(tmpfp, "removed with sylpheed\r\n");
 996
 997         fclose(tmpfp);
 998
 999         news_post(folder, tmp);
1000         remove(tmp);
1001
1002         g_free(tmp);
1003
1004         return 0;
1005 }