src/news.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2004 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 "codeconv.h"
  44 #include "utils.h"
  45 #include "prefs_common.h"
  46 #include "prefs_account.h"
  47 #include "inputdialog.h"
  48 #include "log.h"
  49 #include "progressindicator.h"
  50 #include "remotefolder.h"
  51 #include "alertpanel.h"
  52 #if USE_OPENSSL
  53 #  include "ssl.h"
  54 #endif
  55
  56 #define NNTP_PORT       119
  57 #if USE_OPENSSL
  58 #define NNTPS_PORT      563
  59 #endif
  60
  61 typedef struct _NewsFolder      NewsFolder;
  62
  63 #define NEWS_FOLDER(obj)        ((NewsFolder *)obj)
  64
  65 struct _NewsFolder
  66 {
  67         RemoteFolder rfolder;
  68
  69         gboolean use_auth;
  70 };
  71
  72 static void news_folder_init             (Folder        *folder,
  73                                           const gchar   *name,
  74                                           const gchar   *path);
  75
  76 static Folder   *news_folder_new        (const gchar    *name,
  77                                          const gchar    *folder);
  78 static void      news_folder_destroy    (Folder         *folder);
  79
  80 static gchar *news_fetch_msg            (Folder         *folder,
  81                                          FolderItem     *item,
  82                                          gint            num);
  83
  84
  85 #if USE_OPENSSL
  86 static Session *news_session_new         (const gchar   *server,
  87                                           gushort        port,
  88                                           const gchar   *userid,
  89                                           const gchar   *passwd,
  90                                           SSLType        ssl_type);
  91 #else
  92 static Session *news_session_new         (const gchar   *server,
  93                                           gushort        port,
  94                                           const gchar   *userid,
  95                                           const gchar   *passwd);
  96 #endif
  97
  98 static gint news_get_article_cmd         (NNTPSession   *session,
  99                                           const gchar   *cmd,
 100                                           gint           num,
 101                                           gchar         *filename);
 102 static gint news_get_article             (NNTPSession   *session,
 103                                           gint           num,
 104                                           gchar         *filename);
 105
 106 static gint news_select_group            (NNTPSession   *session,
 107                                           const gchar   *group,
 108                                           gint          *num,
 109                                           gint          *first,
 110                                           gint          *last);
 111 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
 112 static gchar *news_parse_xhdr            (const gchar   *xhdr_str,
 113                                           MsgInfo       *msginfo);
 114 gint news_get_num_list                   (Folder        *folder,
 115                                           FolderItem    *item,
 116                                           GSList       **list,
 117                                           gboolean      *old_uids_valid);
 118 MsgInfo *news_get_msginfo                (Folder        *folder,
 119                                           FolderItem    *item,
 120                                           gint           num);
 121 GSList *news_get_msginfos                (Folder        *folder,
 122                                           FolderItem    *item,
 123                                           GSList        *msgnum_list);
 124 gboolean news_scan_required              (Folder        *folder,
 125                                           FolderItem    *item);
 126
 127 gint news_post_stream                    (Folder        *folder,
 128                                           FILE          *fp);
 129 static gchar *news_folder_get_path       (Folder        *folder);
 130 gchar *news_item_get_path                (Folder        *folder,
 131                                           FolderItem    *item);
 132
 133 static FolderClass news_class;
 134
 135 FolderClass *news_get_class(void)
 136 {
 137         if (news_class.idstr == NULL) {
 138                 news_class.type = F_NEWS;
 139                 news_class.idstr = "news";
 140                 news_class.uistr = "News";
 141
 142                 /* Folder functions */
 143                 news_class.new_folder = news_folder_new;
 144                 news_class.destroy_folder = news_folder_destroy;
 145
 146                 /* FolderItem functions */
 147                 news_class.item_get_path = news_item_get_path;
 148                 news_class.get_num_list = news_get_num_list;
 149                 news_class.scan_required = news_scan_required;
 150
 151                 /* Message functions */
 152                 news_class.get_msginfo = news_get_msginfo;
 153                 news_class.get_msginfos = news_get_msginfos;
 154                 news_class.fetch_msg = news_fetch_msg;
 155         };
 156
 157         return &news_class;
 158 }
 159
 160 static Folder *news_folder_new(const gchar *name, const gchar *path)
 161 {
 162         Folder *folder;
 163
 164         folder = (Folder *)g_new0(NewsFolder, 1);
 165         folder->klass = &news_class;
 166         news_folder_init(folder, name, path);
 167
 168         return folder;
 169 }
 170
 171 static void news_folder_destroy(Folder *folder)
 172 {
 173         gchar *dir;
 174
 175         dir = news_folder_get_path(folder);
 176         if (is_dir_exist(dir))
 177                 remove_dir_recursive(dir);
 178         g_free(dir);
 179
 180         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 181 }
 182
 183 static void news_folder_init(Folder *folder, const gchar *name,
 184                              const gchar *path)
 185 {
 186         folder_remote_folder_init(folder, name, path);
 187 }
 188
 189 #if USE_OPENSSL
 190 static Session *news_session_new(const gchar *server, gushort port,
 191                                  const gchar *userid, const gchar *passwd,
 192                                  SSLType ssl_type)
 193 #else
 194 static Session *news_session_new(const gchar *server, gushort port,
 195                                  const gchar *userid, const gchar *passwd)
 196 #endif
 197 {
 198         gchar buf[NNTPBUFSIZE];
 199         Session *session;
 200
 201         g_return_val_if_fail(server != NULL, NULL);
 202
 203         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 204
 205 #if USE_OPENSSL
 206         session = nntp_session_new(server, port, buf, userid, passwd, ssl_type);
 207 #else
 208         session = nntp_session_new(server, port, buf, userid, passwd);
 209 #endif
 210
 211         return session;
 212 }
 213
 214 static Session *news_session_new_for_folder(Folder *folder)
 215 {
 216         Session *session;
 217         PrefsAccount *ac;
 218         const gchar *userid = NULL;
 219         gchar *passwd = NULL;
 220         gushort port;
 221         gchar buf[NNTPBUFSIZE];
 222
 223         g_return_val_if_fail(folder != NULL, NULL);
 224         g_return_val_if_fail(folder->account != NULL, NULL);
 225
 226         ac = folder->account;
 227         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 228                 userid = ac->userid;
 229                 if (ac->passwd && ac->passwd[0])
 230                         passwd = g_strdup(ac->passwd);
 231                 else
 232                         passwd = input_dialog_query_password(ac->nntp_server,
 233                                                              userid);
 234         }
 235
 236 #if USE_OPENSSL
 237         port = ac->set_nntpport ? ac->nntpport
 238                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 239         session = news_session_new(ac->nntp_server, port, userid, passwd,
 240                                    ac->ssl_nntp);
 241 #else
 242         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 243         session = news_session_new(ac->nntp_server, port, userid, passwd);
 244 #endif
 245         if ((session != NULL) && ac->use_nntp_auth && ac->use_nntp_auth_onconnect)
 246                 nntp_forceauth(NNTP_SESSION(session), buf, userid, passwd);
 247
 248         g_free(passwd);
 249
 250         return session;
 251 }
 252
 253 static NNTPSession *news_session_get(Folder *folder)
 254 {
 255         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 256
 257         g_return_val_if_fail(folder != NULL, NULL);
 258         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 259         g_return_val_if_fail(folder->account != NULL, NULL);
 260
 261         if (prefs_common.work_offline)
 262                 return NULL;
 263
 264         if (!rfolder->session) {
 265                 rfolder->session = news_session_new_for_folder(folder);
 266                 return NNTP_SESSION(rfolder->session);
 267         }
 268
 269         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT_INTERVAL) {
 270                 rfolder->session->last_access_time = time(NULL);
 271                 return NNTP_SESSION(rfolder->session);
 272         }
 273
 274         if (nntp_mode(NNTP_SESSION(rfolder->session), FALSE)
 275             != NN_SUCCESS) {
 276                 log_warning(_("NNTP connection to %s:%d has been"
 277                               " disconnected. Reconnecting...\n"),
 278                             folder->account->nntp_server,
 279                             folder->account->set_nntpport ?
 280                             folder->account->nntpport : NNTP_PORT);
 281                 session_destroy(rfolder->session);
 282                 rfolder->session = news_session_new_for_folder(folder);
 283         }
 284
 285         if (rfolder->session)
 286                 rfolder->session->last_access_time = time(NULL);
 287         return NNTP_SESSION(rfolder->session);
 288 }
 289
 290 static gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 291 {
 292         gchar *path, *filename;
 293         NNTPSession *session;
 294         gint ok;
 295
 296         g_return_val_if_fail(folder != NULL, NULL);
 297         g_return_val_if_fail(item != NULL, NULL);
 298
 299         path = folder_item_get_path(item);
 300         if (!is_dir_exist(path))
 301                 make_dir_hier(path);
 302         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 303         g_free(path);
 304
 305         if (is_file_exist(filename)) {
 306                 debug_print("article %d has been already cached.\n", num);
 307                 return filename;
 308         }
 309
 310         session = news_session_get(folder);
 311         if (!session) {
 312                 g_free(filename);
 313                 return NULL;
 314         }
 315
 316         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 317         if (ok != NN_SUCCESS) {
 318                 if (ok == NN_SOCKET) {
 319                         session_destroy(SESSION(session));
 320                         REMOTE_FOLDER(folder)->session = NULL;
 321                 }
 322                 g_free(filename);
 323                 return NULL;
 324         }
 325
 326         debug_print("getting article %d...\n", num);
 327         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 328                               num, filename);
 329         if (ok != NN_SUCCESS) {
 330                 g_warning("can't read article %d\n", num);
 331                 if (ok == NN_SOCKET) {
 332                         session_destroy(SESSION(session));
 333                         REMOTE_FOLDER(folder)->session = NULL;
 334                 }
 335                 g_free(filename);
 336                 return NULL;
 337         }
 338
 339         return filename;
 340 }
 341
 342 static NewsGroupInfo *news_group_info_new(const gchar *name,
 343                                           gint first, gint last, gchar type)
 344 {
 345         NewsGroupInfo *ginfo;
 346
 347         ginfo = g_new(NewsGroupInfo, 1);
 348         ginfo->name = g_strdup(name);
 349         ginfo->first = first;
 350         ginfo->last = last;
 351         ginfo->type = type;
 352
 353         return ginfo;
 354 }
 355
 356 static void news_group_info_free(NewsGroupInfo *ginfo)
 357 {
 358         g_free(ginfo->name);
 359         g_free(ginfo);
 360 }
 361
 362 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 363                                     NewsGroupInfo *ginfo2)
 364 {
 365         return g_strcasecmp(ginfo1->name, ginfo2->name);
 366 }
 367
 368 GSList *news_get_group_list(Folder *folder)
 369 {
 370         gchar *path, *filename;
 371         FILE *fp;
 372         GSList *list = NULL;
 373         GSList *last = NULL;
 374         gchar buf[NNTPBUFSIZE];
 375
 376         g_return_val_if_fail(folder != NULL, NULL);
 377         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 378
 379         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 380         if (!is_dir_exist(path))
 381                 make_dir_hier(path);
 382         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 383         g_free(path);
 384
 385         if ((fp = fopen(filename, "rb")) == NULL) {
 386                 NNTPSession *session;
 387                 gint ok;
 388
 389                 session = news_session_get(folder);
 390                 if (!session) {
 391                         g_free(filename);
 392                         return NULL;
 393                 }
 394
 395                 ok = nntp_list(session);
 396                 if (ok != NN_SUCCESS) {
 397                         if (ok == NN_SOCKET) {
 398                                 session_destroy(SESSION(session));
 399                                 REMOTE_FOLDER(folder)->session = NULL;
 400                         }
 401                         g_free(filename);
 402                         return NULL;
 403                 }
 404                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 405                         log_warning(_("can't retrieve newsgroup list\n"));
 406                         session_destroy(SESSION(session));
 407                         REMOTE_FOLDER(folder)->session = NULL;
 408                         g_free(filename);
 409                         return NULL;
 410                 }
 411
 412                 if ((fp = fopen(filename, "rb")) == NULL) {
 413                         FILE_OP_ERROR(filename, "fopen");
 414                         g_free(filename);
 415                         return NULL;
 416                 }
 417         }
 418
 419         while (fgets(buf, sizeof(buf), fp) != NULL) {
 420                 gchar *p = buf;
 421                 gchar *name;
 422                 gint last_num;
 423                 gint first_num;
 424                 gchar type;
 425                 NewsGroupInfo *ginfo;
 426
 427                 p = strchr(p, ' ');
 428                 if (!p) continue;
 429                 *p = '\0';
 430                 p++;
 431                 name = buf;
 432
 433                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 434                         continue;
 435
 436                 ginfo = news_group_info_new(name, first_num, last_num, type);
 437
 438                 if (!last)
 439                         last = list = g_slist_append(NULL, ginfo);
 440                 else {
 441                         last = g_slist_append(last, ginfo);
 442                         last = last->next;
 443                 }
 444         }
 445
 446         fclose(fp);
 447         g_free(filename);
 448
 449         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 450
 451         return list;
 452 }
 453
 454 void news_group_list_free(GSList *group_list)
 455 {
 456         GSList *cur;
 457
 458         if (!group_list) return;
 459
 460         for (cur = group_list; cur != NULL; cur = cur->next)
 461                 news_group_info_free((NewsGroupInfo *)cur->data);
 462         g_slist_free(group_list);
 463 }
 464
 465 void news_remove_group_list_cache(Folder *folder)
 466 {
 467         gchar *path, *filename;
 468
 469         g_return_if_fail(folder != NULL);
 470         g_return_if_fail(FOLDER_CLASS(folder) == &news_class);
 471
 472         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 473         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 474         g_free(path);
 475
 476         if (is_file_exist(filename)) {
 477                 if (remove(filename) < 0)
 478                         FILE_OP_ERROR(filename, "remove");
 479         }
 480         g_free(filename);
 481 }
 482
 483 gint news_post(Folder *folder, const gchar *file)
 484 {
 485         FILE *fp;
 486         gint ok;
 487
 488         g_return_val_if_fail(folder != NULL, -1);
 489         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 490         g_return_val_if_fail(file != NULL, -1);
 491
 492         if ((fp = fopen(file, "rb")) == NULL) {
 493                 FILE_OP_ERROR(file, "fopen");
 494                 return -1;
 495         }
 496
 497         ok = news_post_stream(folder, fp);
 498
 499         fclose(fp);
 500
 501         return ok;
 502 }
 503
 504 gint news_post_stream(Folder *folder, FILE *fp)
 505 {
 506         NNTPSession *session;
 507         gint ok;
 508
 509         g_return_val_if_fail(folder != NULL, -1);
 510         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 511         g_return_val_if_fail(fp != NULL, -1);
 512
 513         session = news_session_get(folder);
 514         if (!session) return -1;
 515
 516         ok = nntp_post(session, fp);
 517         if (ok != NN_SUCCESS) {
 518                 log_warning(_("can't post article.\n"));
 519                 if (ok == NN_SOCKET) {
 520                         session_destroy(SESSION(session));
 521                         REMOTE_FOLDER(folder)->session = NULL;
 522                 }
 523                 return -1;
 524         }
 525
 526         return 0;
 527 }
 528
 529 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 530                                  gint num, gchar *filename)
 531 {
 532         gchar *msgid;
 533         gint ok;
 534
 535         ok = nntp_get_article(session, cmd, num, &msgid);
 536         if (ok != NN_SUCCESS)
 537                 return ok;
 538
 539         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 540         g_free(msgid);
 541
 542         ok = recv_write_to_file(SESSION(session)->sock, filename);
 543         if (ok < 0) {
 544                 log_warning(_("can't retrieve article %d\n"), num);
 545                 if (ok == -2)
 546                         return NN_SOCKET;
 547                 else
 548                         return NN_IOERR;
 549         }
 550
 551         return NN_SUCCESS;
 552 }
 553
 554 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 555 {
 556         return news_get_article_cmd(session, "ARTICLE", num, filename);
 557 }
 558
 559 /**
 560  * news_select_group:
 561  * @session: Active NNTP session.
 562  * @group: Newsgroup name.
 563  * @num: Estimated number of articles.
 564  * @first: First article number.
 565  * @last: Last article number.
 566  *
 567  * Select newsgroup @group with the GROUP command if it is not already
 568  * selected in @session, or article numbers need to be returned.
 569  *
 570  * Return value: NNTP result code.
 571  **/
 572 static gint news_select_group(NNTPSession *session, const gchar *group,
 573                               gint *num, gint *first, gint *last)
 574 {
 575         gint ok;
 576         gint num_, first_, last_;
 577
 578         if (!num || !first || !last) {
 579                 if (session->group && g_strcasecmp(session->group, group) == 0)
 580                         return NN_SUCCESS;
 581                 num = &num_;
 582                 first = &first_;
 583                 last = &last_;
 584         }
 585
 586         g_free(session->group);
 587         session->group = NULL;
 588
 589         ok = nntp_group(session, group, num, first, last);
 590         if (ok == NN_SUCCESS)
 591                 session->group = g_strdup(group);
 592         else
 593                 log_warning(_("can't select group: %s\n"), group);
 594
 595         return ok;
 596 }
 597
 598 #define PARSE_ONE_PARAM(p, srcp) \
 599 { \
 600         p = strchr(srcp, '\t'); \
 601         if (!p) return NULL; \
 602         else \
 603                 *p++ = '\0'; \
 604 }
 605
 606 static MsgInfo *news_parse_xover(const gchar *xover_str)
 607 {
 608         MsgInfo *msginfo;
 609         gchar buf[NNTPBUFSIZE];
 610         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp;
 611         gchar *p;
 612         gint num, size_int, line_int;
 613         gchar *xover_buf;
 614
 615         Xstrdup_a(xover_buf, xover_str, return NULL);
 616
 617         PARSE_ONE_PARAM(subject, xover_buf);
 618         PARSE_ONE_PARAM(sender, subject);
 619         PARSE_ONE_PARAM(date, sender);
 620         PARSE_ONE_PARAM(msgid, date);
 621         PARSE_ONE_PARAM(ref, msgid);
 622         PARSE_ONE_PARAM(size, ref);
 623         PARSE_ONE_PARAM(line, size);
 624         /*
 625          * PARSE_ONE_PARAM(xref, line);
 626          *
 627          * if we parse extra headers we should first examine the
 628          * LIST OVERVIEW.FMT response from the server. See
 629          * RFC2980 for details
 630          */
 631
 632         tmp = strchr(line, '\t');
 633         if (!tmp) tmp = strchr(line, '\r');
 634         if (!tmp) tmp = strchr(line, '\n');
 635         if (tmp) *tmp = '\0';
 636
 637         num = atoi(xover_str);
 638         size_int = atoi(size);
 639         line_int = atoi(line);
 640
 641         /* set MsgInfo */
 642         msginfo = procmsg_msginfo_new();
 643         msginfo->msgnum = num;
 644         msginfo->size = size_int;
 645
 646         msginfo->date = g_strdup(date);
 647         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 648
 649         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 650         msginfo->from = g_strdup(buf);
 651         msginfo->fromname = procheader_get_fromname(buf);
 652
 653         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 654         msginfo->subject = g_strdup(buf);
 655
 656         extract_parenthesis(msgid, '<', '>');
 657         remove_space(msgid);
 658         if (*msgid != '\0')
 659                 msginfo->msgid = g_strdup(msgid);
 660
 661         msginfo->references = g_strdup(ref);
 662         eliminate_parenthesis(ref, '(', ')');
 663         if ((p = strrchr(ref, '<')) != NULL) {
 664                 extract_parenthesis(p, '<', '>');
 665                 remove_space(p);
 666                 if (*p != '\0')
 667                         msginfo->inreplyto = g_strdup(p);
 668         }
 669
 670         /*
 671         msginfo->xref = g_strdup(xref);
 672         p = msginfo->xref+strlen(msginfo->xref) - 1;
 673         while (*p == '\r' || *p == '\n') {
 674                 *p = '\0';
 675                 p--;
 676         }
 677         */
 678
 679         return msginfo;
 680 }
 681
 682 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 683 {
 684         gchar *p;
 685         gchar *tmp;
 686         gint num;
 687
 688         p = strchr(xhdr_str, ' ');
 689         if (!p)
 690                 return NULL;
 691         else
 692                 p++;
 693
 694         num = atoi(xhdr_str);
 695         if (msginfo->msgnum != num) return NULL;
 696
 697         tmp = strchr(p, '\r');
 698         if (!tmp) tmp = strchr(p, '\n');
 699
 700         if (tmp)
 701                 return g_strndup(p, tmp - p);
 702         else
 703                 return g_strdup(p);
 704 }
 705
 706 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 707 {
 708         gchar * tmp;
 709         FILE * tmpfp;
 710         gchar buf[BUFFSIZE];
 711
 712         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 713                               G_DIR_SEPARATOR, (gint)msginfo);
 714         if (tmp == NULL)
 715                 return -1;
 716
 717         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 718                 FILE_OP_ERROR(tmp, "fopen");
 719                 return -1;
 720         }
 721         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 722                 FILE_OP_ERROR(tmp, "chmod");
 723                 g_warning("can't change file mode\n");
 724         }
 725
 726         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 727         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 728         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 729         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 730         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 731         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 732         get_rfc822_date(buf, sizeof(buf));
 733         fprintf(tmpfp, "Date: %s\r\n", buf);
 734         fprintf(tmpfp, "\r\n");
 735         fprintf(tmpfp, "removed with sylpheed\r\n");
 736
 737         fclose(tmpfp);
 738
 739         news_post(folder, tmp);
 740         remove(tmp);
 741
 742         g_free(tmp);
 743
 744         return 0;
 745 }
 746
 747 static gchar *news_folder_get_path(Folder *folder)
 748 {
 749         gchar *folder_path;
 750
 751         g_return_val_if_fail(folder->account != NULL, NULL);
 752
 753         folder_path = g_strconcat(get_news_cache_dir(),
 754                                   G_DIR_SEPARATOR_S,
 755                                   folder->account->nntp_server,
 756                                   NULL);
 757         return folder_path;
 758 }
 759
 760 gchar *news_item_get_path(Folder *folder, FolderItem *item)
 761 {
 762         gchar *folder_path, *path;
 763
 764         g_return_val_if_fail(folder != NULL, NULL);
 765         g_return_val_if_fail(item != NULL, NULL);
 766         folder_path = news_folder_get_path(folder);
 767
 768         g_return_val_if_fail(folder_path != NULL, NULL);
 769         if (folder_path[0] == G_DIR_SEPARATOR) {
 770                 if (item->path)
 771                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
 772                                            item->path, NULL);
 773                 else
 774                         path = g_strdup(folder_path);
 775         } else {
 776                 if (item->path)
 777                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 778                                            folder_path, G_DIR_SEPARATOR_S,
 779                                            item->path, NULL);
 780                 else
 781                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 782                                            folder_path, NULL);
 783         }
 784         g_free(folder_path);
 785
 786         return path;
 787 }
 788
 789 gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list, gboolean *old_uids_valid)
 790 {
 791         NNTPSession *session;
 792         gint i, ok, num, first, last, nummsgs = 0;
 793         gchar *dir;
 794
 795         g_return_val_if_fail(item != NULL, -1);
 796         g_return_val_if_fail(item->folder != NULL, -1);
 797         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 798
 799         session = news_session_get(folder);
 800         g_return_val_if_fail(session != NULL, -1);
 801
 802         *old_uids_valid = TRUE;
 803
 804         ok = news_select_group(session, item->path, &num, &first, &last);
 805         if (ok != NN_SUCCESS) {
 806                 log_warning(_("can't set group: %s\n"), item->path);
 807                 return -1;
 808         }
 809
 810         dir = news_folder_get_path(folder);
 811         if (num <= 0)
 812                 remove_all_numbered_files(dir);
 813         else if (last < first)
 814                 log_warning(_("invalid article range: %d - %d\n"),
 815                             first, last);
 816         else {
 817                 for (i = first; i <= last; i++) {
 818                         *msgnum_list = g_slist_prepend(*msgnum_list,
 819                                                        GINT_TO_POINTER(i));
 820                         nummsgs++;
 821                 }
 822                 debug_print("removing old messages from %d to %d in %s\n",
 823                             first, last, dir);
 824                 remove_numbered_files(dir, 1, first - 1);
 825         }
 826         g_free(dir);
 827
 828         return nummsgs;
 829 }
 830
 831 #define READ_TO_LISTEND(hdr) \
 832         while (!(buf[0] == '.' && buf[1] == '\r')) { \
 833                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
 834                         log_warning(_("error occurred while getting %s.\n"), hdr); \
 835                         return msginfo; \
 836                 } \
 837         }
 838
 839 MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
 840 {
 841         NNTPSession *session;
 842         MsgInfo *msginfo = NULL;
 843         gchar buf[NNTPBUFSIZE];
 844         gint ok;
 845
 846         session = news_session_get(folder);
 847         g_return_val_if_fail(session != NULL, NULL);
 848         g_return_val_if_fail(item != NULL, NULL);
 849         g_return_val_if_fail(item->folder != NULL, NULL);
 850         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &news_class, NULL);
 851
 852         log_message(_("getting xover %d in %s...\n"),
 853                     num, item->path);
 854         ok = nntp_xover(session, num, num);
 855         if (ok != NN_SUCCESS) {
 856                 log_warning(_("can't get xover\n"));
 857                 if (ok == NN_SOCKET) {
 858                         session_destroy(SESSION(session));
 859                         REMOTE_FOLDER(item->folder)->session = NULL;
 860                 }
 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         ok = nntp_xhdr(session, "to", num, num);
 885         if (ok != NN_SUCCESS) {
 886                 log_warning(_("can't get xhdr\n"));
 887                 if (ok == NN_SOCKET) {
 888                         session_destroy(SESSION(session));
 889                         REMOTE_FOLDER(item->folder)->session = NULL;
 890                 }
 891                 return msginfo;
 892         }
 893
 894         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 895                 log_warning(_("error occurred while getting xhdr.\n"));
 896                 return msginfo;
 897         }
 898
 899         msginfo->to = news_parse_xhdr(buf, msginfo);
 900
 901         READ_TO_LISTEND("xhdr (to)");
 902
 903         ok = nntp_xhdr(session, "cc", num, num);
 904         if (ok != NN_SUCCESS) {
 905                 log_warning(_("can't get xhdr\n"));
 906                 if (ok == NN_SOCKET) {
 907                         session_destroy(SESSION(session));
 908                         REMOTE_FOLDER(item->folder)->session = NULL;
 909                 }
 910                 return msginfo;
 911         }
 912
 913         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 914                 log_warning(_("error occurred while getting xhdr.\n"));
 915                 return msginfo;
 916         }
 917
 918         msginfo->cc = news_parse_xhdr(buf, msginfo);
 919
 920         READ_TO_LISTEND("xhdr (cc)");
 921
 922         return msginfo;
 923 }
 924
 925 static GSList *news_get_msginfos_for_range(NNTPSession *session, FolderItem *item, guint begin, guint end)
 926 {
 927         gchar buf[NNTPBUFSIZE];
 928         GSList *newlist = NULL;
 929         GSList *llast = NULL;
 930         MsgInfo *msginfo;
 931         guint count = 0, lines = (end - begin + 2) * 3;
 932         gint ok;
 933
 934         g_return_val_if_fail(session != NULL, NULL);
 935         g_return_val_if_fail(item != NULL, NULL);
 936
 937         log_message(_("getting xover %d - %d in %s...\n"),
 938                     begin, end, item->path);
 939         ok = nntp_xover(session, begin, end);
 940         if (ok != NN_SUCCESS) {
 941                 log_warning(_("can't get xover\n"));
 942                 if (ok == NN_SOCKET) {
 943                         session_destroy(SESSION(session));
 944                         REMOTE_FOLDER(item->folder)->session = NULL;
 945                 }
 946                 return NULL;
 947         }
 948
 949         for (;;) {
 950                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 951                         log_warning(_("error occurred while getting xover.\n"));
 952                         return newlist;
 953                 }
 954                 count++;
 955                 progressindicator_set_percentage
 956                         (PROGRESS_TYPE_NETWORK,
 957                          session->fetch_base_percentage +
 958                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
 959
 960                 if (buf[0] == '.' && buf[1] == '\r') break;
 961
 962                 msginfo = news_parse_xover(buf);
 963                 if (!msginfo) {
 964                         log_warning(_("invalid xover line: %s\n"), buf);
 965                         continue;
 966                 }
 967
 968                 msginfo->folder = item;
 969                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 970                 msginfo->flags.tmp_flags = MSG_NEWS;
 971                 msginfo->newsgroups = g_strdup(item->path);
 972
 973                 if (!newlist)
 974                         llast = newlist = g_slist_append(newlist, msginfo);
 975                 else {
 976                         llast = g_slist_append(llast, msginfo);
 977                         llast = llast->next;
 978                 }
 979         }
 980
 981         ok = nntp_xhdr(session, "to", begin, end);
 982         if (ok != NN_SUCCESS) {
 983                 log_warning(_("can't get xhdr\n"));
 984                 if (ok == NN_SOCKET) {
 985                         session_destroy(SESSION(session));
 986                         REMOTE_FOLDER(item->folder)->session = NULL;
 987                 }
 988                 return newlist;
 989         }
 990
 991         llast = newlist;
 992
 993         for (;;) {
 994                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 995                         log_warning(_("error occurred while getting xhdr.\n"));
 996                         return newlist;
 997                 }
 998                 count++;
 999                 progressindicator_set_percentage
1000                         (PROGRESS_TYPE_NETWORK,
1001                          session->fetch_base_percentage +
1002                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
1003
1004                 if (buf[0] == '.' && buf[1] == '\r') break;
1005                 if (!llast) {
1006                         g_warning("llast == NULL\n");
1007                         continue;
1008                 }
1009
1010                 msginfo = (MsgInfo *)llast->data;
1011                 msginfo->to = news_parse_xhdr(buf, msginfo);
1012
1013                 llast = llast->next;
1014         }
1015
1016         ok = nntp_xhdr(session, "cc", begin, end);
1017         if (ok != NN_SUCCESS) {
1018                 log_warning(_("can't get xhdr\n"));
1019                 if (ok == NN_SOCKET) {
1020                         session_destroy(SESSION(session));
1021                         REMOTE_FOLDER(item->folder)->session = NULL;
1022                 }
1023                 return newlist;
1024         }
1025
1026         llast = newlist;
1027
1028         for (;;) {
1029                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1030                         log_warning(_("error occurred while getting xhdr.\n"));
1031                         return newlist;
1032                 }
1033                 count++;
1034                 progressindicator_set_percentage
1035                         (PROGRESS_TYPE_NETWORK,
1036                          session->fetch_base_percentage +
1037                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
1038
1039                 if (buf[0] == '.' && buf[1] == '\r') break;
1040                 if (!llast) {
1041                         g_warning("llast == NULL\n");
1042                         continue;
1043                 }
1044
1045                 msginfo = (MsgInfo *)llast->data;
1046                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1047
1048                 llast = llast->next;
1049         }
1050
1051         return newlist;
1052 }
1053
1054 GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1055 {
1056         NNTPSession *session;
1057         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1058         guint first, last, next;
1059         guint tofetch, fetched;
1060
1061         g_return_val_if_fail(folder != NULL, NULL);
1062         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
1063         g_return_val_if_fail(msgnum_list != NULL, NULL);
1064         g_return_val_if_fail(item != NULL, NULL);
1065
1066         session = news_session_get(folder);
1067         g_return_val_if_fail(session != NULL, NULL);
1068
1069         tmp_msgnum_list = g_slist_copy(msgnum_list);
1070         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, g_int_compare);
1071
1072         progressindicator_start(PROGRESS_TYPE_NETWORK);
1073         tofetch = g_slist_length(tmp_msgnum_list);
1074         fetched = 0;
1075
1076         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1077         last = first;
1078         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1079                 next = GPOINTER_TO_INT(elem->data);
1080                 if(next != (last + 1)) {
1081                         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1082                         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1083                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1084                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1085                         fetched = last - first + 1;
1086                         first = next;
1087                 }
1088                 last = next;
1089         }
1090         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1091         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1092         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1093         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1094
1095         g_slist_free(tmp_msgnum_list);
1096
1097         progressindicator_stop(PROGRESS_TYPE_NETWORK);
1098
1099         return msginfo_list;
1100 }
1101
1102 gboolean news_scan_required(Folder *folder, FolderItem *item)
1103 {
1104         return TRUE;
1105 }