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 #include "remotefolder.h"
  52 #include "alertpanel.h"
  53 #if USE_OPENSSL
  54 #  include "ssl.h"
  55 #endif
  56
  57 #define NNTP_PORT       119
  58 #if USE_OPENSSL
  59 #define NNTPS_PORT      563
  60 #endif
  61
  62 typedef struct _NewsFolder      NewsFolder;
  63
  64 #define NEWS_FOLDER(obj)        ((NewsFolder *)obj)
  65
  66 struct _NewsFolder
  67 {
  68         RemoteFolder rfolder;
  69
  70         gboolean use_auth;
  71 };
  72
  73 static void news_folder_init             (Folder        *folder,
  74                                           const gchar   *name,
  75                                           const gchar   *path);
  76
  77 static Folder   *news_folder_new        (const gchar    *name,
  78                                          const gchar    *folder);
  79 static void      news_folder_destroy    (Folder         *folder);
  80
  81 static gchar *news_fetch_msg            (Folder         *folder,
  82                                          FolderItem     *item,
  83                                          gint            num);
  84
  85
  86 #if USE_OPENSSL
  87 static Session *news_session_new         (const gchar   *server,
  88                                           gushort        port,
  89                                           const gchar   *userid,
  90                                           const gchar   *passwd,
  91                                           SSLType        ssl_type);
  92 #else
  93 static Session *news_session_new         (const gchar   *server,
  94                                           gushort        port,
  95                                           const gchar   *userid,
  96                                           const gchar   *passwd);
  97 #endif
  98
  99 static gint news_get_article_cmd         (NNTPSession   *session,
 100                                           const gchar   *cmd,
 101                                           gint           num,
 102                                           gchar         *filename);
 103 static gint news_get_article             (NNTPSession   *session,
 104                                           gint           num,
 105                                           gchar         *filename);
 106
 107 static gint news_select_group            (NNTPSession   *session,
 108                                           const gchar   *group,
 109                                           gint          *num,
 110                                           gint          *first,
 111                                           gint          *last);
 112 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
 113 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
 114                                           MsgInfo       *msginfo);
 115 gint news_get_num_list                   (Folder        *folder,
 116                                           FolderItem    *item,
 117                                           GSList       **list,
 118                                           gboolean      *old_uids_valid);
 119 MsgInfo *news_get_msginfo                (Folder        *folder,
 120                                           FolderItem    *item,
 121                                           gint           num);
 122 GSList *news_get_msginfos                (Folder        *folder,
 123                                           FolderItem    *item,
 124                                           GSList        *msgnum_list);
 125 gboolean news_scan_required              (Folder        *folder,
 126                                           FolderItem    *item);
 127
 128 gint news_post_stream                    (Folder        *folder,
 129                                           FILE          *fp);
 130 static gchar *news_folder_get_path       (Folder        *folder);
 131 gchar *news_item_get_path                (Folder        *folder,
 132                                           FolderItem    *item);
 133
 134 static FolderClass news_class =
 135 {
 136         F_NEWS,
 137         "news",
 138         "News",
 139
 140         /* Folder functions */
 141         news_folder_new,
 142         news_folder_destroy,
 143         NULL,
 144         NULL,
 145         NULL,
 146         NULL,
 147
 148         /* FolderItem functions */
 149         NULL,
 150         NULL,
 151         NULL,
 152         NULL,
 153         news_item_get_path,
 154         NULL,
 155         NULL,
 156         NULL,
 157         NULL,
 158         news_get_num_list,
 159         NULL,
 160         NULL,
 161         NULL,
 162         news_scan_required,
 163
 164         /* Message functions */
 165         news_get_msginfo,
 166         news_get_msginfos,
 167         news_fetch_msg,
 168         NULL,
 169         NULL,
 170         NULL,
 171         NULL,
 172         NULL,
 173         NULL,
 174         NULL,
 175         NULL,
 176 };
 177
 178 FolderClass *news_get_class(void)
 179 {
 180         return &news_class;
 181 }
 182
 183 static Folder *news_folder_new(const gchar *name, const gchar *path)
 184 {
 185         Folder *folder;
 186
 187         folder = (Folder *)g_new0(NewsFolder, 1);
 188         folder->klass = &news_class;
 189         news_folder_init(folder, name, path);
 190
 191         return folder;
 192 }
 193
 194 static void news_folder_destroy(Folder *folder)
 195 {
 196         gchar *dir;
 197
 198         dir = news_folder_get_path(folder);
 199         if (is_dir_exist(dir))
 200                 remove_dir_recursive(dir);
 201         g_free(dir);
 202
 203         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 204 }
 205
 206 static void news_folder_init(Folder *folder, const gchar *name,
 207                              const gchar *path)
 208 {
 209         folder_remote_folder_init(folder, name, path);
 210 }
 211
 212 #if USE_OPENSSL
 213 static Session *news_session_new(const gchar *server, gushort port,
 214                                  const gchar *userid, const gchar *passwd,
 215                                  SSLType ssl_type)
 216 #else
 217 static Session *news_session_new(const gchar *server, gushort port,
 218                                  const gchar *userid, const gchar *passwd)
 219 #endif
 220 {
 221         gchar buf[NNTPBUFSIZE];
 222         Session *session;
 223
 224         g_return_val_if_fail(server != NULL, NULL);
 225
 226         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 227
 228 #if USE_OPENSSL
 229         session = nntp_session_new(server, port, buf, userid, passwd, ssl_type);
 230 #else
 231         session = nntp_session_new(server, port, buf, userid, passwd);
 232 #endif
 233
 234         return session;
 235 }
 236
 237 static Session *news_session_new_for_folder(Folder *folder)
 238 {
 239         Session *session;
 240         PrefsAccount *ac;
 241         const gchar *userid = NULL;
 242         gchar *passwd = NULL;
 243         gushort port;
 244         gchar buf[NNTPBUFSIZE];
 245
 246         g_return_val_if_fail(folder != NULL, NULL);
 247         g_return_val_if_fail(folder->account != NULL, NULL);
 248
 249         ac = folder->account;
 250         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 251                 userid = ac->userid;
 252                 if (ac->passwd && ac->passwd[0])
 253                         passwd = g_strdup(ac->passwd);
 254                 else
 255                         passwd = input_dialog_query_password(ac->nntp_server,
 256                                                              userid);
 257         }
 258
 259 #if USE_OPENSSL
 260         port = ac->set_nntpport ? ac->nntpport
 261                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 262         session = news_session_new(ac->nntp_server, port, userid, passwd,
 263                                    ac->ssl_nntp);
 264 #else
 265         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 266         session = news_session_new(ac->nntp_server, port, userid, passwd);
 267 #endif
 268         if ((session != NULL) && ac->use_nntp_auth && ac->use_nntp_auth_onconnect)
 269                 nntp_forceauth(NNTP_SESSION(session), buf, userid, passwd);
 270
 271         g_free(passwd);
 272
 273         return session;
 274 }
 275
 276 static NNTPSession *news_session_get(Folder *folder)
 277 {
 278         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 279
 280         g_return_val_if_fail(folder != NULL, NULL);
 281         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 282         g_return_val_if_fail(folder->account != NULL, NULL);
 283
 284         if (prefs_common.work_offline) {
 285                 g_print("offline mode\n");
 286                 return NULL;
 287         }
 288
 289         if (!rfolder->session) {
 290                 rfolder->session = news_session_new_for_folder(folder);
 291                 return NNTP_SESSION(rfolder->session);
 292         }
 293
 294         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT) {
 295                 rfolder->session->last_access_time = time(NULL);
 296                 return NNTP_SESSION(rfolder->session);
 297         }
 298
 299         if (nntp_mode(NNTP_SESSION(rfolder->session), FALSE)
 300             != NN_SUCCESS) {
 301                 log_warning("NNTP connection to %s:%d has been"
 302                               " disconnected. Reconnecting...\n",
 303                             folder->account->nntp_server,
 304                             folder->account->set_nntpport ?
 305                             folder->account->nntpport : NNTP_PORT);
 306                 session_destroy(rfolder->session);
 307                 rfolder->session = news_session_new_for_folder(folder);
 308         }
 309
 310         if (rfolder->session)
 311                 rfolder->session->last_access_time = time(NULL);
 312         return NNTP_SESSION(rfolder->session);
 313 }
 314
 315 static 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         if (ok != NN_SUCCESS) {
 343                 g_warning("can't select group %s\n", item->path);
 344                 g_free(filename);
 345                 return NULL;
 346         }
 347
 348         debug_print("getting article %d...\n", num);
 349         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 350                               num, filename);
 351         if (ok < 0) {
 352                 g_warning("can't read article %d\n", num);
 353                 session_destroy(SESSION(session));
 354                 REMOTE_FOLDER(folder)->session = NULL;
 355                 g_free(filename);
 356                 return NULL;
 357         }
 358
 359         return filename;
 360 }
 361
 362 static NewsGroupInfo *news_group_info_new(const gchar *name,
 363                                           gint first, gint last, gchar type)
 364 {
 365         NewsGroupInfo *ginfo;
 366
 367         ginfo = g_new(NewsGroupInfo, 1);
 368         ginfo->name = g_strdup(name);
 369         ginfo->first = first;
 370         ginfo->last = last;
 371         ginfo->type = type;
 372
 373         return ginfo;
 374 }
 375
 376 static void news_group_info_free(NewsGroupInfo *ginfo)
 377 {
 378         g_free(ginfo->name);
 379         g_free(ginfo);
 380 }
 381
 382 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 383                                     NewsGroupInfo *ginfo2)
 384 {
 385         return g_strcasecmp(ginfo1->name, ginfo2->name);
 386 }
 387
 388 GSList *news_get_group_list(Folder *folder)
 389 {
 390         gchar *path, *filename;
 391         FILE *fp;
 392         GSList *list = NULL;
 393         GSList *last = NULL;
 394         gchar buf[NNTPBUFSIZE];
 395
 396         g_return_val_if_fail(folder != NULL, NULL);
 397         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 398
 399         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 400         if (!is_dir_exist(path))
 401                 make_dir_hier(path);
 402         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 403         g_free(path);
 404
 405         if ((fp = fopen(filename, "rb")) == NULL) {
 406                 NNTPSession *session;
 407
 408                 session = news_session_get(folder);
 409                 if (!session) {
 410                         g_free(filename);
 411                         return NULL;
 412                 }
 413
 414                 if (nntp_list(session) != NN_SUCCESS) {
 415                         g_free(filename);
 416                         return NULL;
 417                 }
 418                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 419                         log_warning("can't retrieve newsgroup list\n");
 420                         session_destroy(SESSION(session));
 421                         REMOTE_FOLDER(folder)->session = NULL;
 422                         g_free(filename);
 423                         return NULL;
 424                 }
 425
 426                 if ((fp = fopen(filename, "rb")) == NULL) {
 427                         FILE_OP_ERROR(filename, "fopen");
 428                         g_free(filename);
 429                         return NULL;
 430                 }
 431         }
 432
 433         while (fgets(buf, sizeof(buf), fp) != NULL) {
 434                 gchar *p = buf;
 435                 gchar *name;
 436                 gint last_num;
 437                 gint first_num;
 438                 gchar type;
 439                 NewsGroupInfo *ginfo;
 440
 441                 p = strchr(p, ' ');
 442                 if (!p) continue;
 443                 *p = '\0';
 444                 p++;
 445                 name = buf;
 446
 447                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 448                         continue;
 449
 450                 ginfo = news_group_info_new(name, first_num, last_num, type);
 451
 452                 if (!last)
 453                         last = list = g_slist_append(NULL, ginfo);
 454                 else {
 455                         last = g_slist_append(last, ginfo);
 456                         last = last->next;
 457                 }
 458         }
 459
 460         fclose(fp);
 461         g_free(filename);
 462
 463         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 464
 465         return list;
 466 }
 467
 468 void news_group_list_free(GSList *group_list)
 469 {
 470         GSList *cur;
 471
 472         if (!group_list) return;
 473
 474         for (cur = group_list; cur != NULL; cur = cur->next)
 475                 news_group_info_free((NewsGroupInfo *)cur->data);
 476         g_slist_free(group_list);
 477 }
 478
 479 void news_remove_group_list_cache(Folder *folder)
 480 {
 481         gchar *path, *filename;
 482
 483         g_return_if_fail(folder != NULL);
 484         g_return_if_fail(FOLDER_CLASS(folder) == &news_class);
 485
 486         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 487         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 488         g_free(path);
 489
 490         if (is_file_exist(filename)) {
 491                 if (remove(filename) < 0)
 492                         FILE_OP_ERROR(filename, "remove");
 493         }
 494         g_free(filename);
 495 }
 496
 497 gint news_post(Folder *folder, const gchar *file)
 498 {
 499         FILE *fp;
 500         gint ok;
 501
 502         g_return_val_if_fail(folder != NULL, -1);
 503         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 504         g_return_val_if_fail(file != NULL, -1);
 505
 506         if ((fp = fopen(file, "rb")) == NULL) {
 507                 FILE_OP_ERROR(file, "fopen");
 508                 return -1;
 509         }
 510
 511         ok = news_post_stream(folder, fp);
 512
 513         fclose(fp);
 514
 515         return ok;
 516 }
 517
 518 gint news_post_stream(Folder *folder, FILE *fp)
 519 {
 520         NNTPSession *session;
 521         gint ok;
 522
 523         g_return_val_if_fail(folder != NULL, -1);
 524         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 525         g_return_val_if_fail(fp != NULL, -1);
 526
 527         session = news_session_get(folder);
 528         if (!session) return -1;
 529
 530         ok = nntp_post(session, fp);
 531         if (ok != NN_SUCCESS) {
 532                 log_warning("can't post article.\n");
 533                 return -1;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 540                                  gint num, gchar *filename)
 541 {
 542         gchar *msgid;
 543
 544         if (nntp_get_article(session, cmd, num, &msgid)
 545             != NN_SUCCESS)
 546                 return -1;
 547
 548         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 549         g_free(msgid);
 550
 551         if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 552                 log_warning("can't retrieve article %d\n", num);
 553                 return -1;
 554         }
 555
 556         return 0;
 557 }
 558
 559 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 560 {
 561         return news_get_article_cmd(session, "ARTICLE", num, filename);
 562 }
 563
 564 /**
 565  * news_select_group:
 566  * @session: Active NNTP session.
 567  * @group: Newsgroup name.
 568  * @num: Estimated number of articles.
 569  * @first: First article number.
 570  * @last: Last article number.
 571  *
 572  * Select newsgroup @group with the GROUP command if it is not already
 573  * selected in @session, or article numbers need to be returned.
 574  *
 575  * Return value: NNTP result code.
 576  **/
 577 static gint news_select_group(NNTPSession *session, const gchar *group,
 578                               gint *num, gint *first, gint *last)
 579 {
 580         gint ok;
 581         gint num_, first_, last_;
 582
 583         if (!num || !first || !last) {
 584                 if (session->group && g_strcasecmp(session->group, group) == 0)
 585                         return NN_SUCCESS;
 586                 num = &num_;
 587                 first = &first_;
 588                 last = &last_;
 589         }
 590
 591         g_free(session->group);
 592         session->group = NULL;
 593
 594         ok = nntp_group(session, group, num, first, last);
 595         if (ok == NN_SUCCESS)
 596                 session->group = g_strdup(group);
 597
 598         return ok;
 599 }
 600
 601 #define PARSE_ONE_PARAM(p, srcp) \
 602 { \
 603         p = strchr(srcp, '\t'); \
 604         if (!p) return NULL; \
 605         else \
 606                 *p++ = '\0'; \
 607 }
 608
 609 static MsgInfo *news_parse_xover(const gchar *xover_str)
 610 {
 611         MsgInfo *msginfo;
 612         gchar buf[NNTPBUFSIZE];
 613         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp;
 614         gchar *p;
 615         gint num, size_int, line_int;
 616         gchar *xover_buf;
 617
 618         Xstrdup_a(xover_buf, xover_str, return NULL);
 619
 620         PARSE_ONE_PARAM(subject, xover_buf);
 621         PARSE_ONE_PARAM(sender, subject);
 622         PARSE_ONE_PARAM(date, sender);
 623         PARSE_ONE_PARAM(msgid, date);
 624         PARSE_ONE_PARAM(ref, msgid);
 625         PARSE_ONE_PARAM(size, ref);
 626         PARSE_ONE_PARAM(line, size);
 627         /*
 628          * PARSE_ONE_PARAM(xref, line);
 629          *
 630          * if we parse extra headers we should first examine the
 631          * LIST OVERVIEW.FMT response from the server. See
 632          * RFC2980 for details
 633          */
 634
 635         tmp = strchr(line, '\t');
 636         if (!tmp) tmp = strchr(line, '\r');
 637         if (!tmp) tmp = strchr(line, '\n');
 638         if (tmp) *tmp = '\0';
 639
 640         num = atoi(xover_str);
 641         size_int = atoi(size);
 642         line_int = atoi(line);
 643
 644         /* set MsgInfo */
 645         msginfo = procmsg_msginfo_new();
 646         msginfo->msgnum = num;
 647         msginfo->size = size_int;
 648
 649         msginfo->date = g_strdup(date);
 650         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 651
 652         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 653         msginfo->from = g_strdup(buf);
 654         msginfo->fromname = procheader_get_fromname(buf);
 655
 656         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 657         msginfo->subject = g_strdup(buf);
 658
 659         extract_parenthesis(msgid, '<', '>');
 660         remove_space(msgid);
 661         if (*msgid != '\0')
 662                 msginfo->msgid = g_strdup(msgid);
 663
 664         msginfo->references = g_strdup(ref);
 665         eliminate_parenthesis(ref, '(', ')');
 666         if ((p = strrchr(ref, '<')) != NULL) {
 667                 extract_parenthesis(p, '<', '>');
 668                 remove_space(p);
 669                 if (*p != '\0')
 670                         msginfo->inreplyto = g_strdup(p);
 671         }
 672
 673         /*
 674         msginfo->xref = g_strdup(xref);
 675         p = msginfo->xref+strlen(msginfo->xref) - 1;
 676         while (*p == '\r' || *p == '\n') {
 677                 *p = '\0';
 678                 p--;
 679         }
 680         */
 681
 682         return msginfo;
 683 }
 684
 685 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 686 {
 687         gchar *p;
 688         gchar *tmp;
 689         gint num;
 690
 691         p = strchr(xhdr_str, ' ');
 692         if (!p)
 693                 return NULL;
 694         else
 695                 p++;
 696
 697         num = atoi(xhdr_str);
 698         if (msginfo->msgnum != num) return NULL;
 699
 700         tmp = strchr(p, '\r');
 701         if (!tmp) tmp = strchr(p, '\n');
 702
 703         if (tmp)
 704                 return g_strndup(p, tmp - p);
 705         else
 706                 return g_strdup(p);
 707 }
 708
 709 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 710 {
 711         gchar * tmp;
 712         FILE * tmpfp;
 713         gchar buf[BUFFSIZE];
 714
 715         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 716                               G_DIR_SEPARATOR, (gint)msginfo);
 717         if (tmp == NULL)
 718                 return -1;
 719
 720         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 721                 FILE_OP_ERROR(tmp, "fopen");
 722                 return -1;
 723         }
 724         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 725                 FILE_OP_ERROR(tmp, "chmod");
 726                 g_warning("can't change file mode\n");
 727         }
 728
 729         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 730         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 731         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 732         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 733         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 734         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 735         get_rfc822_date(buf, sizeof(buf));
 736         fprintf(tmpfp, "Date: %s\r\n", buf);
 737         fprintf(tmpfp, "\r\n");
 738         fprintf(tmpfp, "removed with sylpheed\r\n");
 739
 740         fclose(tmpfp);
 741
 742         news_post(folder, tmp);
 743         remove(tmp);
 744
 745         g_free(tmp);
 746
 747         return 0;
 748 }
 749
 750 static gchar *news_folder_get_path(Folder *folder)
 751 {
 752         gchar *folder_path;
 753
 754         g_return_val_if_fail(folder->account != NULL, NULL);
 755
 756         folder_path = g_strconcat(get_news_cache_dir(),
 757                                   G_DIR_SEPARATOR_S,
 758                                   folder->account->nntp_server,
 759                                   NULL);
 760         return folder_path;
 761 }
 762
 763 gchar *news_item_get_path(Folder *folder, FolderItem *item)
 764 {
 765         gchar *folder_path, *path;
 766
 767         g_return_val_if_fail(folder != NULL, NULL);
 768         g_return_val_if_fail(item != NULL, NULL);
 769         folder_path = news_folder_get_path(folder);
 770
 771         g_return_val_if_fail(folder_path != NULL, NULL);
 772         if (folder_path[0] == G_DIR_SEPARATOR) {
 773                 if (item->path)
 774                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
 775                                            item->path, NULL);
 776                 else
 777                         path = g_strdup(folder_path);
 778         } else {
 779                 if (item->path)
 780                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 781                                            folder_path, G_DIR_SEPARATOR_S,
 782                                            item->path, NULL);
 783                 else
 784                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 785                                            folder_path, NULL);
 786         }
 787         g_free(folder_path);
 788
 789         return path;
 790 }
 791
 792 gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list, gboolean *old_uids_valid)
 793 {
 794         NNTPSession *session;
 795         gint i, ok, num, first, last, nummsgs = 0;
 796         gchar *dir;
 797
 798         g_return_val_if_fail(item != NULL, -1);
 799         g_return_val_if_fail(item->folder != NULL, -1);
 800         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 801
 802         session = news_session_get(folder);
 803         g_return_val_if_fail(session != NULL, -1);
 804
 805         *old_uids_valid = TRUE;
 806
 807         ok = news_select_group(session, item->path, &num, &first, &last);
 808         if (ok != NN_SUCCESS) {
 809                 log_warning(_("can't set group: %s\n"), item->path);
 810                 return -1;
 811         }
 812
 813         if (num <= 0) {
 814                 remove_all_numbered_files(dir);
 815                 return 0;
 816         }
 817
 818         if(last < first) {
 819                 log_warning(_("invalid article range: %d - %d\n"),
 820                             first, last);
 821                 return 0;
 822         }
 823
 824         for(i = first; i <= last; i++) {
 825                 *msgnum_list = g_slist_prepend(*msgnum_list, GINT_TO_POINTER(i));
 826                 nummsgs++;
 827         }
 828
 829         dir = folder_item_get_path(item);
 830         debug_print("removing old messages from %d to %d in %s\n", first, last, dir);
 831         remove_numbered_files(dir, 1, first - 1);
 832         g_free(dir);
 833
 834         return nummsgs;
 835 }
 836
 837 #define READ_TO_LISTEND(hdr) \
 838         while (!(buf[0] == '.' && buf[1] == '\r')) { \
 839                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
 840                         log_warning(_("error occurred while getting %s.\n"), hdr); \
 841                         return msginfo; \
 842                 } \
 843         }
 844
 845 MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
 846 {
 847         NNTPSession *session;
 848         MsgInfo *msginfo = NULL;
 849         gchar buf[NNTPBUFSIZE];
 850
 851         session = news_session_get(folder);
 852         g_return_val_if_fail(session != NULL, NULL);
 853         g_return_val_if_fail(item != NULL, NULL);
 854         g_return_val_if_fail(item->folder != NULL, NULL);
 855         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &news_class, NULL);
 856
 857         log_message(_("getting xover %d in %s...\n"),
 858                     num, item->path);
 859         if (nntp_xover(session, num, num) != NN_SUCCESS) {
 860                 log_warning(_("can't get xover\n"));
 861                 return NULL;
 862         }
 863
 864         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 865                 log_warning(_("error occurred while getting xover.\n"));
 866                 return NULL;
 867         }
 868
 869         msginfo = news_parse_xover(buf);
 870         if (!msginfo) {
 871                 log_warning(_("invalid xover line: %s\n"), buf);
 872         }
 873
 874         READ_TO_LISTEND("xover");
 875
 876         if(!msginfo)
 877                 return NULL;
 878
 879         msginfo->folder = item;
 880         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 881         msginfo->flags.tmp_flags = MSG_NEWS;
 882         msginfo->newsgroups = g_strdup(item->path);
 883
 884         if (nntp_xhdr(session, "to", num, num) != NN_SUCCESS) {
 885                 log_warning(_("can't get xhdr\n"));
 886                 return msginfo;
 887         }
 888
 889         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 890                 log_warning(_("error occurred while getting xhdr.\n"));
 891                 return msginfo;
 892         }
 893
 894         msginfo->to = news_parse_xhdr(buf, msginfo);
 895
 896         READ_TO_LISTEND("xhdr (to)");
 897
 898         if (nntp_xhdr(session, "cc", num, num) != NN_SUCCESS) {
 899                 log_warning(_("can't get xhdr\n"));
 900                 return msginfo;
 901         }
 902
 903         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 904                 log_warning(_("error occurred while getting xhdr.\n"));
 905                 return msginfo;
 906         }
 907
 908         msginfo->cc = news_parse_xhdr(buf, msginfo);
 909
 910         READ_TO_LISTEND("xhdr (cc)");
 911
 912         return msginfo;
 913 }
 914
 915 static GSList *news_get_msginfos_for_range(NNTPSession *session, FolderItem *item, guint begin, guint end)
 916 {
 917         gchar buf[NNTPBUFSIZE];
 918         GSList *newlist = NULL;
 919         GSList *llast = NULL;
 920         MsgInfo *msginfo;
 921         guint count = 0, lines = (end - begin + 2) * 3;
 922
 923         g_return_val_if_fail(session != NULL, NULL);
 924         g_return_val_if_fail(item != NULL, NULL);
 925
 926         log_message(_("getting xover %d - %d in %s...\n"),
 927                     begin, end, item->path);
 928         if (nntp_xover(session, begin, end) != NN_SUCCESS) {
 929                 log_warning(_("can't get xover\n"));
 930                 return NULL;
 931         }
 932
 933         for (;;) {
 934                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 935                         log_warning(_("error occurred while getting xover.\n"));
 936                         return newlist;
 937                 }
 938                 count++;
 939                 progressindicator_set_percentage
 940                         (PROGRESS_TYPE_NETWORK,
 941                          session->fetch_base_percentage +
 942                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
 943
 944                 if (buf[0] == '.' && buf[1] == '\r') break;
 945
 946                 msginfo = news_parse_xover(buf);
 947                 if (!msginfo) {
 948                         log_warning(_("invalid xover line: %s\n"), buf);
 949                         continue;
 950                 }
 951
 952                 msginfo->folder = item;
 953                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 954                 msginfo->flags.tmp_flags = MSG_NEWS;
 955                 msginfo->newsgroups = g_strdup(item->path);
 956
 957                 if (!newlist)
 958                         llast = newlist = g_slist_append(newlist, msginfo);
 959                 else {
 960                         llast = g_slist_append(llast, msginfo);
 961                         llast = llast->next;
 962                 }
 963         }
 964
 965         if (nntp_xhdr(session, "to", begin, end) != NN_SUCCESS) {
 966                 log_warning(_("can't get xhdr\n"));
 967                 return newlist;
 968         }
 969
 970         llast = newlist;
 971
 972         for (;;) {
 973                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 974                         log_warning(_("error occurred while getting xhdr.\n"));
 975                         return newlist;
 976                 }
 977                 count++;
 978                 progressindicator_set_percentage
 979                         (PROGRESS_TYPE_NETWORK,
 980                          session->fetch_base_percentage +
 981                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
 982
 983                 if (buf[0] == '.' && buf[1] == '\r') break;
 984                 if (!llast) {
 985                         g_warning("llast == NULL\n");
 986                         continue;
 987                 }
 988
 989                 msginfo = (MsgInfo *)llast->data;
 990                 msginfo->to = news_parse_xhdr(buf, msginfo);
 991
 992                 llast = llast->next;
 993         }
 994
 995         if (nntp_xhdr(session, "cc", begin, end) != NN_SUCCESS) {
 996                 log_warning(_("can't get xhdr\n"));
 997                 return newlist;
 998         }
 999
1000         llast = newlist;
1001
1002         for (;;) {
1003                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1004                         log_warning(_("error occurred while getting xhdr.\n"));
1005                         return newlist;
1006                 }
1007                 count++;
1008                 progressindicator_set_percentage
1009                         (PROGRESS_TYPE_NETWORK,
1010                          session->fetch_base_percentage +
1011                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
1012
1013                 if (buf[0] == '.' && buf[1] == '\r') break;
1014                 if (!llast) {
1015                         g_warning("llast == NULL\n");
1016                         continue;
1017                 }
1018
1019                 msginfo = (MsgInfo *)llast->data;
1020                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1021
1022                 llast = llast->next;
1023         }
1024
1025         return newlist;
1026 }
1027
1028 GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1029 {
1030         NNTPSession *session;
1031         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1032         guint first, last, next;
1033         guint tofetch, fetched;
1034
1035         g_return_val_if_fail(folder != NULL, NULL);
1036         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
1037         g_return_val_if_fail(msgnum_list != NULL, NULL);
1038         g_return_val_if_fail(item != NULL, NULL);
1039
1040         session = news_session_get(folder);
1041         g_return_val_if_fail(session != NULL, NULL);
1042
1043         tmp_msgnum_list = g_slist_copy(msgnum_list);
1044         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, g_int_compare);
1045
1046         progressindicator_start(PROGRESS_TYPE_NETWORK);
1047         tofetch = g_slist_length(tmp_msgnum_list);
1048         fetched = 0;
1049
1050         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1051         last = first;
1052         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1053                 next = GPOINTER_TO_INT(elem->data);
1054                 if(next != (last + 1)) {
1055                         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1056                         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1057                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1058                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1059                         fetched = last - first + 1;
1060                         first = next;
1061                 }
1062                 last = next;
1063         }
1064         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1065         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1066         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1067         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1068
1069         g_slist_free(tmp_msgnum_list);
1070
1071         progressindicator_stop(PROGRESS_TYPE_NETWORK);
1072
1073         return msginfo_list;
1074 }
1075
1076 gboolean news_scan_required(Folder *folder, FolderItem *item)
1077 {
1078         return TRUE;
1079 }