src/news.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2003 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 "log.h"
  50 #include "progressindicator.h"
  51 #if USE_OPENSSL
  52 #  include "ssl.h"
  53 #endif
  54
  55 #define NNTP_PORT       119
  56 #if USE_OPENSSL
  57 #define NNTPS_PORT      563
  58 #endif
  59
  60 static void news_folder_init             (Folder        *folder,
  61                                           const gchar   *name,
  62                                           const gchar   *path);
  63
  64 #if USE_OPENSSL
  65 static Session *news_session_new         (const gchar   *server,
  66                                           gushort        port,
  67                                           const gchar   *userid,
  68                                           const gchar   *passwd,
  69                                           SSLType        ssl_type);
  70 #else
  71 static Session *news_session_new         (const gchar   *server,
  72                                           gushort        port,
  73                                           const gchar   *userid,
  74                                           const gchar   *passwd);
  75 #endif
  76
  77 static gint news_get_article_cmd         (NNTPSession   *session,
  78                                           const gchar   *cmd,
  79                                           gint           num,
  80                                           gchar         *filename);
  81 static gint news_get_article             (NNTPSession   *session,
  82                                           gint           num,
  83                                           gchar         *filename);
  84
  85 static gint news_select_group            (NNTPSession   *session,
  86                                           const gchar   *group,
  87                                           gint          *num,
  88                                           gint          *first,
  89                                           gint          *last);
  90 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  91 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
  92                                           MsgInfo       *msginfo);
  93 static gint news_remove_msg              (Folder        *folder,
  94                                           FolderItem    *item,
  95                                           gint           num);
  96 gint news_get_num_list                   (Folder        *folder,
  97                                           FolderItem    *item,
  98                                           GSList       **list);
  99 MsgInfo *news_get_msginfo                (Folder        *folder,
 100                                           FolderItem    *item,
 101                                           gint           num);
 102 GSList *news_get_msginfos                (Folder        *folder,
 103                                           FolderItem    *item,
 104                                           GSList        *msgnum_list);
 105
 106 gint news_post_stream                    (Folder        *folder,
 107                                           FILE          *fp);
 108
 109 FolderClass news_class =
 110 {
 111         F_NEWS,
 112         "news",
 113         "News",
 114
 115         /* Folder functions */
 116         news_folder_new,
 117         news_folder_destroy,
 118         NULL,
 119         NULL,
 120
 121         /* FolderItem functions */
 122         NULL,
 123         NULL,
 124         NULL,
 125         NULL,
 126         NULL,
 127         news_get_num_list,
 128         NULL,
 129         NULL,
 130         NULL,
 131         NULL,
 132
 133         /* Message functions */
 134         news_get_msginfo,
 135         news_get_msginfos,
 136         news_fetch_msg,
 137         NULL,
 138         NULL,
 139         NULL,
 140         NULL,
 141         NULL,
 142         news_remove_msg,
 143         NULL,
 144         NULL,
 145         NULL,
 146         NULL,
 147 };
 148
 149 FolderClass *news_get_class()
 150 {
 151         return &news_class;
 152 }
 153
 154 Folder *news_folder_new(const gchar *name, const gchar *path)
 155 {
 156         Folder *folder;
 157
 158         folder = (Folder *)g_new0(NewsFolder, 1);
 159         folder->class = &news_class;
 160         news_folder_init(folder, name, path);
 161
 162         return folder;
 163 }
 164
 165 void news_folder_destroy(Folder *folder)
 166 {
 167         gchar *dir;
 168
 169         dir = folder_get_path(folder);
 170         if (is_dir_exist(dir))
 171                 remove_dir_recursive(dir);
 172         g_free(dir);
 173
 174         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 175 }
 176
 177 static void news_folder_init(Folder *folder, const gchar *name,
 178                              const gchar *path)
 179 {
 180         folder_remote_folder_init(folder, name, path);
 181 }
 182
 183 #if USE_OPENSSL
 184 static Session *news_session_new(const gchar *server, gushort port,
 185                                  const gchar *userid, const gchar *passwd,
 186                                  SSLType ssl_type)
 187 #else
 188 static Session *news_session_new(const gchar *server, gushort port,
 189                                  const gchar *userid, const gchar *passwd)
 190 #endif
 191 {
 192         gchar buf[NNTPBUFSIZE];
 193         Session *session;
 194
 195         g_return_val_if_fail(server != NULL, NULL);
 196
 197         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 198
 199 #if USE_OPENSSL
 200         session = nntp_session_new(server, port, buf, userid, passwd, ssl_type);
 201 #else
 202         session = nntp_session_new(server, port, buf, userid, passwd);
 203 #endif
 204
 205         return session;
 206 }
 207
 208 static Session *news_session_new_for_folder(Folder *folder)
 209 {
 210         Session *session;
 211         PrefsAccount *ac;
 212         const gchar *userid = NULL;
 213         gchar *passwd = NULL;
 214         gushort port;
 215         gchar buf[NNTPBUFSIZE];
 216
 217         g_return_val_if_fail(folder != NULL, NULL);
 218         g_return_val_if_fail(folder->account != NULL, NULL);
 219
 220         ac = folder->account;
 221         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 222                 userid = ac->userid;
 223                 if (ac->passwd && ac->passwd[0])
 224                         passwd = g_strdup(ac->passwd);
 225                 else
 226                         passwd = input_dialog_query_password(ac->nntp_server,
 227                                                              userid);
 228         }
 229
 230 #if USE_OPENSSL
 231         port = ac->set_nntpport ? ac->nntpport
 232                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 233         session = news_session_new(ac->nntp_server, port, userid, passwd,
 234                                    ac->ssl_nntp);
 235 #else
 236         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 237         session = news_session_new(ac->nntp_server, port, userid, passwd);
 238 #endif
 239         if ((session != NULL) && ac->use_nntp_auth && ac->use_nntp_auth_onconnect)
 240                 nntp_forceauth(NNTP_SESSION(session), buf, userid, passwd);
 241
 242         g_free(passwd);
 243
 244         return session;
 245 }
 246
 247 NNTPSession *news_session_get(Folder *folder)
 248 {
 249         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 250
 251         g_return_val_if_fail(folder != NULL, NULL);
 252         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 253         g_return_val_if_fail(folder->account != NULL, NULL);
 254
 255         if (!rfolder->session) {
 256                 rfolder->session = news_session_new_for_folder(folder);
 257                 return NNTP_SESSION(rfolder->session);
 258         }
 259
 260         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 261                 rfolder->session->last_access_time = time(NULL);
 262                 return NNTP_SESSION(rfolder->session);
 263         }
 264
 265         if (nntp_mode(NNTP_SESSION(rfolder->session), FALSE)
 266             != NN_SUCCESS) {
 267                 log_warning("NNTP connection to %s:%d has been"
 268                               " disconnected. Reconnecting...\n",
 269                             folder->account->nntp_server,
 270                             folder->account->set_nntpport ?
 271                             folder->account->nntpport : NNTP_PORT);
 272                 session_destroy(rfolder->session);
 273                 rfolder->session = news_session_new_for_folder(folder);
 274         }
 275
 276         if (rfolder->session)
 277                 rfolder->session->last_access_time = time(NULL);
 278         return NNTP_SESSION(rfolder->session);
 279 }
 280
 281 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 282 {
 283         gchar *path, *filename;
 284         NNTPSession *session;
 285         gint ok;
 286
 287         g_return_val_if_fail(folder != NULL, NULL);
 288         g_return_val_if_fail(item != NULL, NULL);
 289
 290         path = folder_item_get_path(item);
 291         if (!is_dir_exist(path))
 292                 make_dir_hier(path);
 293         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 294         g_free(path);
 295
 296         if (is_file_exist(filename)) {
 297                 debug_print("article %d has been already cached.\n", num);
 298                 return filename;
 299         }
 300
 301         session = news_session_get(folder);
 302         if (!session) {
 303                 g_free(filename);
 304                 return NULL;
 305         }
 306
 307         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 308         if (ok != NN_SUCCESS) {
 309                 g_warning("can't select group %s\n", item->path);
 310                 g_free(filename);
 311                 return NULL;
 312         }
 313
 314         debug_print("getting article %d...\n", num);
 315         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 316                               num, filename);
 317         if (ok < 0) {
 318                 g_warning("can't read article %d\n", num);
 319                 session_destroy(SESSION(session));
 320                 REMOTE_FOLDER(folder)->session = NULL;
 321                 g_free(filename);
 322                 return NULL;
 323         }
 324
 325         return filename;
 326 }
 327
 328 gint news_scan_group(Folder *folder, FolderItem *item)
 329 {
 330         NNTPSession *session;
 331         gint num = 0, first = 0, last = 0;
 332         gint ok;
 333
 334         g_return_val_if_fail(folder != NULL, -1);
 335         g_return_val_if_fail(item != NULL, -1);
 336
 337         session = news_session_get(folder);
 338         if (!session) return -1;
 339
 340         ok = news_select_group(session, item->path, &num, &first, &last);
 341         if (ok != NN_SUCCESS) {
 342                 log_warning("can't set group: %s\n", item->path);
 343                 return -1;
 344         }
 345
 346         if (num == 0) {
 347                 item->new = item->unread = item->total = item->last_num = 0;
 348                 return 0;
 349         }
 350
 351 /*
 352         path = folder_item_get_path(item);
 353         if (path && is_dir_exist(path)) {
 354                 procmsg_get_mark_sum(path, &new, &unread, &total, &min, &max,
 355                                      first);
 356         }
 357         g_free(path);
 358
 359         if (max < first || last < min)
 360                 new = unread = total = num;
 361         else {
 362                 if (min < first)
 363                         min = first;
 364
 365                 if (last < max)
 366                         max = last;
 367                 else if (max < last) {
 368                         new += last - max;
 369                         unread += last - max;
 370                 }
 371
 372                 if (new > num) new = num;
 373                 if (unread > num) unread = num;
 374         }
 375
 376         item->new = new;
 377         item->unread = unread;
 378         item->total = num;
 379         item->last_num = last;
 380 */
 381         return 0;
 382 }
 383
 384 static NewsGroupInfo *news_group_info_new(const gchar *name,
 385                                           gint first, gint last, gchar type)
 386 {
 387         NewsGroupInfo *ginfo;
 388
 389         ginfo = g_new(NewsGroupInfo, 1);
 390         ginfo->name = g_strdup(name);
 391         ginfo->first = first;
 392         ginfo->last = last;
 393         ginfo->type = type;
 394
 395         return ginfo;
 396 }
 397
 398 static void news_group_info_free(NewsGroupInfo *ginfo)
 399 {
 400         g_free(ginfo->name);
 401         g_free(ginfo);
 402 }
 403
 404 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 405                                     NewsGroupInfo *ginfo2)
 406 {
 407         return g_strcasecmp(ginfo1->name, ginfo2->name);
 408 }
 409
 410 GSList *news_get_group_list(Folder *folder)
 411 {
 412         gchar *path, *filename;
 413         FILE *fp;
 414         GSList *list = NULL;
 415         GSList *last = NULL;
 416         gchar buf[NNTPBUFSIZE];
 417
 418         g_return_val_if_fail(folder != NULL, NULL);
 419         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 420
 421         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 422         if (!is_dir_exist(path))
 423                 make_dir_hier(path);
 424         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 425         g_free(path);
 426
 427         if ((fp = fopen(filename, "rb")) == NULL) {
 428                 NNTPSession *session;
 429
 430                 session = news_session_get(folder);
 431                 if (!session) {
 432                         g_free(filename);
 433                         return NULL;
 434                 }
 435
 436                 if (nntp_list(session) != NN_SUCCESS) {
 437                         g_free(filename);
 438                         return NULL;
 439                 }
 440                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 441                         log_warning("can't retrieve newsgroup list\n");
 442                         session_destroy(SESSION(session));
 443                         REMOTE_FOLDER(folder)->session = NULL;
 444                         g_free(filename);
 445                         return NULL;
 446                 }
 447
 448                 if ((fp = fopen(filename, "rb")) == NULL) {
 449                         FILE_OP_ERROR(filename, "fopen");
 450                         g_free(filename);
 451                         return NULL;
 452                 }
 453         }
 454
 455         while (fgets(buf, sizeof(buf), fp) != NULL) {
 456                 gchar *p = buf;
 457                 gchar *name;
 458                 gint last_num;
 459                 gint first_num;
 460                 gchar type;
 461                 NewsGroupInfo *ginfo;
 462
 463                 p = strchr(p, ' ');
 464                 if (!p) continue;
 465                 *p = '\0';
 466                 p++;
 467                 name = buf;
 468
 469                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 470                         continue;
 471
 472                 ginfo = news_group_info_new(name, first_num, last_num, type);
 473
 474                 if (!last)
 475                         last = list = g_slist_append(NULL, ginfo);
 476                 else {
 477                         last = g_slist_append(last, ginfo);
 478                         last = last->next;
 479                 }
 480         }
 481
 482         fclose(fp);
 483         g_free(filename);
 484
 485         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 486
 487         return list;
 488 }
 489
 490 void news_group_list_free(GSList *group_list)
 491 {
 492         GSList *cur;
 493
 494         if (!group_list) return;
 495
 496         for (cur = group_list; cur != NULL; cur = cur->next)
 497                 news_group_info_free((NewsGroupInfo *)cur->data);
 498         g_slist_free(group_list);
 499 }
 500
 501 void news_remove_group_list_cache(Folder *folder)
 502 {
 503         gchar *path, *filename;
 504
 505         g_return_if_fail(folder != NULL);
 506         g_return_if_fail(FOLDER_CLASS(folder) == &news_class);
 507
 508         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 509         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 510         g_free(path);
 511
 512         if (is_file_exist(filename)) {
 513                 if (remove(filename) < 0)
 514                         FILE_OP_ERROR(filename, "remove");
 515         }
 516         g_free(filename);
 517 }
 518
 519 gint news_post(Folder *folder, const gchar *file)
 520 {
 521         FILE *fp;
 522         gint ok;
 523
 524         g_return_val_if_fail(folder != NULL, -1);
 525         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 526         g_return_val_if_fail(file != NULL, -1);
 527
 528         if ((fp = fopen(file, "rb")) == NULL) {
 529                 FILE_OP_ERROR(file, "fopen");
 530                 return -1;
 531         }
 532
 533         ok = news_post_stream(folder, fp);
 534
 535         fclose(fp);
 536
 537         return ok;
 538 }
 539
 540 gint news_post_stream(Folder *folder, FILE *fp)
 541 {
 542         NNTPSession *session;
 543         gint ok;
 544
 545         g_return_val_if_fail(folder != NULL, -1);
 546         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 547         g_return_val_if_fail(fp != NULL, -1);
 548
 549         session = news_session_get(folder);
 550         if (!session) return -1;
 551
 552         ok = nntp_post(session, fp);
 553         if (ok != NN_SUCCESS) {
 554                 log_warning("can't post article.\n");
 555                 return -1;
 556         }
 557
 558         return 0;
 559 }
 560
 561 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 562                                  gint num, gchar *filename)
 563 {
 564         gchar *msgid;
 565
 566         if (nntp_get_article(session, cmd, num, &msgid)
 567             != NN_SUCCESS)
 568                 return -1;
 569
 570         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 571         g_free(msgid);
 572
 573         if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 574                 log_warning("can't retrieve article %d\n", num);
 575                 return -1;
 576         }
 577
 578         return 0;
 579 }
 580
 581 static gint news_remove_msg(Folder *folder, FolderItem *item, gint num)
 582 {
 583         gchar * dir;
 584         gint r;
 585
 586         dir = folder_item_get_path(item);
 587         debug_print("news_remove_msg: removing msg %d in %s\n",num,dir);
 588         r = remove_numbered_files(dir, num, num);
 589         g_free(dir);
 590
 591         return r;
 592 }
 593
 594 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 595 {
 596         return news_get_article_cmd(session, "ARTICLE", num, filename);
 597 }
 598
 599 /**
 600  * news_select_group:
 601  * @session: Active NNTP session.
 602  * @group: Newsgroup name.
 603  * @num: Estimated number of articles.
 604  * @first: First article number.
 605  * @last: Last article number.
 606  *
 607  * Select newsgroup @group with the GROUP command if it is not already
 608  * selected in @session, or article numbers need to be returned.
 609  *
 610  * Return value: NNTP result code.
 611  **/
 612 static gint news_select_group(NNTPSession *session, const gchar *group,
 613                               gint *num, gint *first, gint *last)
 614 {
 615         gint ok;
 616         gint num_, first_, last_;
 617
 618         if (!num || !first || !last) {
 619                 if (session->group && g_strcasecmp(session->group, group) == 0)
 620                         return NN_SUCCESS;
 621                 num = &num_;
 622                 first = &first_;
 623                 last = &last_;
 624         }
 625
 626         g_free(session->group);
 627         session->group = NULL;
 628
 629         ok = nntp_group(session, group, num, first, last);
 630         if (ok == NN_SUCCESS)
 631                 session->group = g_strdup(group);
 632
 633         return ok;
 634 }
 635
 636 #define PARSE_ONE_PARAM(p, srcp) \
 637 { \
 638         p = strchr(srcp, '\t'); \
 639         if (!p) return NULL; \
 640         else \
 641                 *p++ = '\0'; \
 642 }
 643
 644 static MsgInfo *news_parse_xover(const gchar *xover_str)
 645 {
 646         MsgInfo *msginfo;
 647         gchar buf[NNTPBUFSIZE];
 648         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp, *xref;
 649         gchar *p;
 650         gint num, size_int, line_int;
 651         gchar *xover_buf;
 652
 653         Xstrdup_a(xover_buf, xover_str, return NULL);
 654
 655         PARSE_ONE_PARAM(subject, xover_buf);
 656         PARSE_ONE_PARAM(sender, subject);
 657         PARSE_ONE_PARAM(date, sender);
 658         PARSE_ONE_PARAM(msgid, date);
 659         PARSE_ONE_PARAM(ref, msgid);
 660         PARSE_ONE_PARAM(size, ref);
 661         PARSE_ONE_PARAM(line, size);
 662         PARSE_ONE_PARAM(xref, line);
 663
 664         tmp = strchr(xref, '\t');
 665         if (!tmp) tmp = strchr(line, '\r');
 666         if (!tmp) tmp = strchr(line, '\n');
 667         if (tmp) *tmp = '\0';
 668
 669         num = atoi(xover_str);
 670         size_int = atoi(size);
 671         line_int = atoi(line);
 672
 673         /* set MsgInfo */
 674         msginfo = procmsg_msginfo_new();
 675         msginfo->msgnum = num;
 676         msginfo->size = size_int;
 677
 678         msginfo->date = g_strdup(date);
 679         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 680
 681         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 682         msginfo->from = g_strdup(buf);
 683         msginfo->fromname = procheader_get_fromname(buf);
 684
 685         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 686         msginfo->subject = g_strdup(buf);
 687
 688         extract_parenthesis(msgid, '<', '>');
 689         remove_space(msgid);
 690         if (*msgid != '\0')
 691                 msginfo->msgid = g_strdup(msgid);
 692
 693         msginfo->references = g_strdup(ref);
 694         eliminate_parenthesis(ref, '(', ')');
 695         if ((p = strrchr(ref, '<')) != NULL) {
 696                 extract_parenthesis(p, '<', '>');
 697                 remove_space(p);
 698                 if (*p != '\0')
 699                         msginfo->inreplyto = g_strdup(p);
 700         }
 701
 702         msginfo->xref = g_strdup(xref);
 703         p = msginfo->xref+strlen(msginfo->xref) - 1;
 704         while (*p == '\r' || *p == '\n') {
 705                 *p = '\0';
 706                 p--;
 707         }
 708
 709         return msginfo;
 710 }
 711
 712 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 713 {
 714         gchar *p;
 715         gchar *tmp;
 716         gint num;
 717
 718         p = strchr(xhdr_str, ' ');
 719         if (!p)
 720                 return NULL;
 721         else
 722                 p++;
 723
 724         num = atoi(xhdr_str);
 725         if (msginfo->msgnum != num) return NULL;
 726
 727         tmp = strchr(p, '\r');
 728         if (!tmp) tmp = strchr(p, '\n');
 729
 730         if (tmp)
 731                 return g_strndup(p, tmp - p);
 732         else
 733                 return g_strdup(p);
 734 }
 735
 736 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 737 {
 738         gchar * tmp;
 739         FILE * tmpfp;
 740         gchar buf[BUFFSIZE];
 741
 742         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 743                               G_DIR_SEPARATOR, (gint)msginfo);
 744         if (tmp == NULL)
 745                 return -1;
 746
 747         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 748                 FILE_OP_ERROR(tmp, "fopen");
 749                 return -1;
 750         }
 751         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 752                 FILE_OP_ERROR(tmp, "chmod");
 753                 g_warning("can't change file mode\n");
 754         }
 755
 756         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 757         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 758         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 759         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 760         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 761         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 762         get_rfc822_date(buf, sizeof(buf));
 763         fprintf(tmpfp, "Date: %s\r\n", buf);
 764         fprintf(tmpfp, "\r\n");
 765         fprintf(tmpfp, "removed with sylpheed\r\n");
 766
 767         fclose(tmpfp);
 768
 769         news_post(folder, tmp);
 770         remove(tmp);
 771
 772         g_free(tmp);
 773
 774         return 0;
 775 }
 776
 777 gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list)
 778 {
 779         NNTPSession *session;
 780         gint i, ok, num, first, last, nummsgs = 0;
 781         gchar *dir;
 782
 783         g_return_val_if_fail(item != NULL, -1);
 784         g_return_val_if_fail(item->folder != NULL, -1);
 785         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 786
 787         session = news_session_get(folder);
 788         g_return_val_if_fail(session != NULL, -1);
 789
 790         ok = news_select_group(session, item->path, &num, &first, &last);
 791         if (ok != NN_SUCCESS) {
 792                 log_warning(_("can't set group: %s\n"), item->path);
 793                 return -1;
 794         }
 795
 796         if(last < first) {
 797                 log_warning(_("invalid article range: %d - %d\n"),
 798                             first, last);
 799                 return 0;
 800         }
 801
 802         for(i = first; i <= last; i++) {
 803                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(i));
 804                 nummsgs++;
 805         }
 806
 807         dir = folder_item_get_path(item);
 808         debug_print("removing old messages from %d to %d in %s\n", first, last, dir);
 809         remove_numbered_files(dir, 1, first - 1);
 810         g_free(dir);
 811
 812         return nummsgs;
 813 }
 814
 815 #define READ_TO_LISTEND(hdr) \
 816         while (!(buf[0] == '.' && buf[1] == '\r')) { \
 817                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
 818                         log_warning(_("error occurred while getting %s.\n"), hdr); \
 819                         return msginfo; \
 820                 } \
 821         }
 822
 823 MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
 824 {
 825         NNTPSession *session;
 826         MsgInfo *msginfo = NULL;
 827         gchar buf[NNTPBUFSIZE];
 828
 829         session = news_session_get(folder);
 830         g_return_val_if_fail(session != NULL, NULL);
 831         g_return_val_if_fail(item != NULL, NULL);
 832         g_return_val_if_fail(item->folder != NULL, NULL);
 833         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &news_class, NULL);
 834
 835         log_message(_("getting xover %d in %s...\n"),
 836                     num, item->path);
 837         if (nntp_xover(session, num, num) != NN_SUCCESS) {
 838                 log_warning(_("can't get xover\n"));
 839                 return NULL;
 840         }
 841
 842         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 843                 log_warning(_("error occurred while getting xover.\n"));
 844                 return NULL;
 845         }
 846
 847         msginfo = news_parse_xover(buf);
 848         if (!msginfo) {
 849                 log_warning(_("invalid xover line: %s\n"), buf);
 850         }
 851
 852         READ_TO_LISTEND("xover");
 853
 854         if(!msginfo)
 855                 return NULL;
 856
 857         msginfo->folder = item;
 858         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 859         msginfo->flags.tmp_flags = MSG_NEWS;
 860         msginfo->newsgroups = g_strdup(item->path);
 861
 862         if (nntp_xhdr(session, "to", num, num) != NN_SUCCESS) {
 863                 log_warning(_("can't get xhdr\n"));
 864                 return msginfo;
 865         }
 866
 867         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 868                 log_warning(_("error occurred while getting xhdr.\n"));
 869                 return msginfo;
 870         }
 871
 872         msginfo->to = news_parse_xhdr(buf, msginfo);
 873
 874         READ_TO_LISTEND("xhdr (to)");
 875
 876         if (nntp_xhdr(session, "cc", num, num) != NN_SUCCESS) {
 877                 log_warning(_("can't get xhdr\n"));
 878                 return msginfo;
 879         }
 880
 881         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 882                 log_warning(_("error occurred while getting xhdr.\n"));
 883                 return msginfo;
 884         }
 885
 886         msginfo->cc = news_parse_xhdr(buf, msginfo);
 887
 888         READ_TO_LISTEND("xhdr (cc)");
 889
 890         return msginfo;
 891 }
 892
 893 static GSList *news_get_msginfos_for_range(NNTPSession *session, FolderItem *item, guint begin, guint end)
 894 {
 895         gchar buf[NNTPBUFSIZE];
 896         GSList *newlist = NULL;
 897         GSList *llast = NULL;
 898         MsgInfo *msginfo;
 899         guint count = 0, lines = (end - begin + 2) * 3;
 900
 901         g_return_val_if_fail(session != NULL, NULL);
 902         g_return_val_if_fail(item != NULL, NULL);
 903
 904         log_message(_("getting xover %d - %d in %s...\n"),
 905                     begin, end, item->path);
 906         if (nntp_xover(session, begin, end) != NN_SUCCESS) {
 907                 log_warning(_("can't get xover\n"));
 908                 return NULL;
 909         }
 910
 911         for (;;) {
 912                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 913                         log_warning(_("error occurred while getting xover.\n"));
 914                         return newlist;
 915                 }
 916                 count++;
 917                 progressindicator_set_percentage
 918                         (PROGRESS_TYPE_NETWORK,
 919                          session->fetch_base_percentage +
 920                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
 921
 922                 if (buf[0] == '.' && buf[1] == '\r') break;
 923
 924                 msginfo = news_parse_xover(buf);
 925                 if (!msginfo) {
 926                         log_warning(_("invalid xover line: %s\n"), buf);
 927                         continue;
 928                 }
 929
 930                 msginfo->folder = item;
 931                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 932                 msginfo->flags.tmp_flags = MSG_NEWS;
 933                 msginfo->newsgroups = g_strdup(item->path);
 934
 935                 if (!newlist)
 936                         llast = newlist = g_slist_append(newlist, msginfo);
 937                 else {
 938                         llast = g_slist_append(llast, msginfo);
 939                         llast = llast->next;
 940                 }
 941         }
 942
 943         if (nntp_xhdr(session, "to", begin, end) != NN_SUCCESS) {
 944                 log_warning(_("can't get xhdr\n"));
 945                 return newlist;
 946         }
 947
 948         llast = newlist;
 949
 950         for (;;) {
 951                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 952                         log_warning(_("error occurred while getting xhdr.\n"));
 953                         return newlist;
 954                 }
 955                 count++;
 956                 progressindicator_set_percentage
 957                         (PROGRESS_TYPE_NETWORK,
 958                          session->fetch_base_percentage +
 959                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
 960
 961                 if (buf[0] == '.' && buf[1] == '\r') break;
 962                 if (!llast) {
 963                         g_warning("llast == NULL\n");
 964                         continue;
 965                 }
 966
 967                 msginfo = (MsgInfo *)llast->data;
 968                 msginfo->to = news_parse_xhdr(buf, msginfo);
 969
 970                 llast = llast->next;
 971         }
 972
 973         if (nntp_xhdr(session, "cc", begin, end) != NN_SUCCESS) {
 974                 log_warning(_("can't get xhdr\n"));
 975                 return newlist;
 976         }
 977
 978         llast = newlist;
 979
 980         for (;;) {
 981                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 982                         log_warning(_("error occurred while getting xhdr.\n"));
 983                         return newlist;
 984                 }
 985                 count++;
 986                 progressindicator_set_percentage
 987                         (PROGRESS_TYPE_NETWORK,
 988                          session->fetch_base_percentage +
 989                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
 990
 991                 if (buf[0] == '.' && buf[1] == '\r') break;
 992                 if (!llast) {
 993                         g_warning("llast == NULL\n");
 994                         continue;
 995                 }
 996
 997                 msginfo = (MsgInfo *)llast->data;
 998                 msginfo->cc = news_parse_xhdr(buf, msginfo);
 999
1000                 llast = llast->next;
1001         }
1002
1003         return newlist;
1004 }
1005
1006 gint news_fetch_msgnum_sort(gconstpointer a, gconstpointer b)
1007 {
1008         return (GPOINTER_TO_INT(a) - GPOINTER_TO_INT(b));
1009 }
1010
1011 GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1012 {
1013         NNTPSession *session;
1014         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1015         guint first, last, next;
1016         guint tofetch, fetched;
1017
1018         g_return_val_if_fail(folder != NULL, NULL);
1019         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
1020         g_return_val_if_fail(msgnum_list != NULL, NULL);
1021         g_return_val_if_fail(item != NULL, NULL);
1022
1023         session = news_session_get(folder);
1024         g_return_val_if_fail(session != NULL, NULL);
1025
1026         tmp_msgnum_list = g_slist_copy(msgnum_list);
1027         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, news_fetch_msgnum_sort);
1028
1029         progressindicator_start(PROGRESS_TYPE_NETWORK);
1030         tofetch = g_slist_length(tmp_msgnum_list);
1031         fetched = 0;
1032
1033         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1034         last = first;
1035         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1036                 next = GPOINTER_TO_INT(elem->data);
1037                 if(next != (last + 1)) {
1038                         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1039                         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1040                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1041                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1042                         fetched = last - first + 1;
1043                         first = next;
1044                 }
1045                 last = next;
1046         }
1047         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1048         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1049         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1050         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1051
1052         g_slist_free(tmp_msgnum_list);
1053
1054         progressindicator_stop(PROGRESS_TYPE_NETWORK);
1055
1056         return msginfo_list;
1057 }