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 "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 FolderClass *news_get_class(void)
 137 {
 138         if (news_class.idstr == NULL) {
 139                 news_class.type = F_NEWS;
 140                 news_class.idstr = "news";
 141                 news_class.uistr = "News";
 142
 143                 /* Folder functions */
 144                 news_class.new_folder = news_folder_new;
 145                 news_class.destroy_folder = news_folder_destroy;
 146
 147                 /* FolderItem functions */
 148                 news_class.item_get_path = news_item_get_path;
 149                 news_class.get_num_list = news_get_num_list;
 150                 news_class.scan_required = news_scan_required;
 151
 152                 /* Message functions */
 153                 news_class.get_msginfo = news_get_msginfo;
 154                 news_class.get_msginfos = news_get_msginfos;
 155                 news_class.fetch_msg = news_fetch_msg;
 156         };
 157
 158         return &news_class;
 159 }
 160
 161 static Folder *news_folder_new(const gchar *name, const gchar *path)
 162 {
 163         Folder *folder;
 164
 165         folder = (Folder *)g_new0(NewsFolder, 1);
 166         folder->klass = &news_class;
 167         news_folder_init(folder, name, path);
 168
 169         return folder;
 170 }
 171
 172 static void news_folder_destroy(Folder *folder)
 173 {
 174         gchar *dir;
 175
 176         dir = news_folder_get_path(folder);
 177         if (is_dir_exist(dir))
 178                 remove_dir_recursive(dir);
 179         g_free(dir);
 180
 181         folder_remote_folder_destroy(REMOTE_FOLDER(folder));
 182 }
 183
 184 static void news_folder_init(Folder *folder, const gchar *name,
 185                              const gchar *path)
 186 {
 187         folder_remote_folder_init(folder, name, path);
 188 }
 189
 190 #if USE_OPENSSL
 191 static Session *news_session_new(const gchar *server, gushort port,
 192                                  const gchar *userid, const gchar *passwd,
 193                                  SSLType ssl_type)
 194 #else
 195 static Session *news_session_new(const gchar *server, gushort port,
 196                                  const gchar *userid, const gchar *passwd)
 197 #endif
 198 {
 199         gchar buf[NNTPBUFSIZE];
 200         Session *session;
 201
 202         g_return_val_if_fail(server != NULL, NULL);
 203
 204         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
 205
 206 #if USE_OPENSSL
 207         session = nntp_session_new(server, port, buf, userid, passwd, ssl_type);
 208 #else
 209         session = nntp_session_new(server, port, buf, userid, passwd);
 210 #endif
 211
 212         return session;
 213 }
 214
 215 static Session *news_session_new_for_folder(Folder *folder)
 216 {
 217         Session *session;
 218         PrefsAccount *ac;
 219         const gchar *userid = NULL;
 220         gchar *passwd = NULL;
 221         gushort port;
 222         gchar buf[NNTPBUFSIZE];
 223
 224         g_return_val_if_fail(folder != NULL, NULL);
 225         g_return_val_if_fail(folder->account != NULL, NULL);
 226
 227         ac = folder->account;
 228         if (ac->use_nntp_auth && ac->userid && ac->userid[0]) {
 229                 userid = ac->userid;
 230                 if (ac->passwd && ac->passwd[0])
 231                         passwd = g_strdup(ac->passwd);
 232                 else
 233                         passwd = input_dialog_query_password(ac->nntp_server,
 234                                                              userid);
 235         }
 236
 237 #if USE_OPENSSL
 238         port = ac->set_nntpport ? ac->nntpport
 239                 : ac->ssl_nntp ? NNTPS_PORT : NNTP_PORT;
 240         session = news_session_new(ac->nntp_server, port, userid, passwd,
 241                                    ac->ssl_nntp);
 242 #else
 243         port = ac->set_nntpport ? ac->nntpport : NNTP_PORT;
 244         session = news_session_new(ac->nntp_server, port, userid, passwd);
 245 #endif
 246         if ((session != NULL) && ac->use_nntp_auth && ac->use_nntp_auth_onconnect)
 247                 nntp_forceauth(NNTP_SESSION(session), buf, userid, passwd);
 248
 249         g_free(passwd);
 250
 251         return session;
 252 }
 253
 254 static NNTPSession *news_session_get(Folder *folder)
 255 {
 256         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 257
 258         g_return_val_if_fail(folder != NULL, NULL);
 259         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 260         g_return_val_if_fail(folder->account != NULL, NULL);
 261
 262         if (prefs_common.work_offline)
 263                 return NULL;
 264
 265         if (!rfolder->session) {
 266                 rfolder->session = news_session_new_for_folder(folder);
 267                 return NNTP_SESSION(rfolder->session);
 268         }
 269
 270         if (time(NULL) - rfolder->session->last_access_time < SESSION_TIMEOUT_INTERVAL) {
 271                 rfolder->session->last_access_time = time(NULL);
 272                 return NNTP_SESSION(rfolder->session);
 273         }
 274
 275         if (nntp_mode(NNTP_SESSION(rfolder->session), FALSE)
 276             != NN_SUCCESS) {
 277                 log_warning(_("NNTP connection to %s:%d has been"
 278                               " disconnected. Reconnecting...\n"),
 279                             folder->account->nntp_server,
 280                             folder->account->set_nntpport ?
 281                             folder->account->nntpport : NNTP_PORT);
 282                 session_destroy(rfolder->session);
 283                 rfolder->session = news_session_new_for_folder(folder);
 284         }
 285
 286         if (rfolder->session)
 287                 rfolder->session->last_access_time = time(NULL);
 288         return NNTP_SESSION(rfolder->session);
 289 }
 290
 291 static gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 292 {
 293         gchar *path, *filename;
 294         NNTPSession *session;
 295         gint ok;
 296
 297         g_return_val_if_fail(folder != NULL, NULL);
 298         g_return_val_if_fail(item != NULL, NULL);
 299
 300         path = folder_item_get_path(item);
 301         if (!is_dir_exist(path))
 302                 make_dir_hier(path);
 303         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 304         g_free(path);
 305
 306         if (is_file_exist(filename)) {
 307                 debug_print("article %d has been already cached.\n", num);
 308                 return filename;
 309         }
 310
 311         session = news_session_get(folder);
 312         if (!session) {
 313                 g_free(filename);
 314                 return NULL;
 315         }
 316
 317         ok = news_select_group(session, item->path, NULL, NULL, NULL);
 318         if (ok != NN_SUCCESS) {
 319                 if (ok == NN_SOCKET) {
 320                         session_destroy(SESSION(session));
 321                         REMOTE_FOLDER(folder)->session = NULL;
 322                 }
 323                 g_free(filename);
 324                 return NULL;
 325         }
 326
 327         debug_print("getting article %d...\n", num);
 328         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 329                               num, filename);
 330         if (ok != NN_SUCCESS) {
 331                 g_warning("can't read article %d\n", num);
 332                 if (ok == NN_SOCKET) {
 333                         session_destroy(SESSION(session));
 334                         REMOTE_FOLDER(folder)->session = NULL;
 335                 }
 336                 g_free(filename);
 337                 return NULL;
 338         }
 339
 340         return filename;
 341 }
 342
 343 static NewsGroupInfo *news_group_info_new(const gchar *name,
 344                                           gint first, gint last, gchar type)
 345 {
 346         NewsGroupInfo *ginfo;
 347
 348         ginfo = g_new(NewsGroupInfo, 1);
 349         ginfo->name = g_strdup(name);
 350         ginfo->first = first;
 351         ginfo->last = last;
 352         ginfo->type = type;
 353
 354         return ginfo;
 355 }
 356
 357 static void news_group_info_free(NewsGroupInfo *ginfo)
 358 {
 359         g_free(ginfo->name);
 360         g_free(ginfo);
 361 }
 362
 363 static gint news_group_info_compare(NewsGroupInfo *ginfo1,
 364                                     NewsGroupInfo *ginfo2)
 365 {
 366         return g_strcasecmp(ginfo1->name, ginfo2->name);
 367 }
 368
 369 GSList *news_get_group_list(Folder *folder)
 370 {
 371         gchar *path, *filename;
 372         FILE *fp;
 373         GSList *list = NULL;
 374         GSList *last = NULL;
 375         gchar buf[NNTPBUFSIZE];
 376
 377         g_return_val_if_fail(folder != NULL, NULL);
 378         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
 379
 380         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 381         if (!is_dir_exist(path))
 382                 make_dir_hier(path);
 383         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 384         g_free(path);
 385
 386         if ((fp = fopen(filename, "rb")) == NULL) {
 387                 NNTPSession *session;
 388                 gint ok;
 389
 390                 session = news_session_get(folder);
 391                 if (!session) {
 392                         g_free(filename);
 393                         return NULL;
 394                 }
 395
 396                 ok = nntp_list(session);
 397                 if (ok != NN_SUCCESS) {
 398                         if (ok == NN_SOCKET) {
 399                                 session_destroy(SESSION(session));
 400                                 REMOTE_FOLDER(folder)->session = NULL;
 401                         }
 402                         g_free(filename);
 403                         return NULL;
 404                 }
 405                 if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 406                         log_warning(_("can't retrieve newsgroup list\n"));
 407                         session_destroy(SESSION(session));
 408                         REMOTE_FOLDER(folder)->session = NULL;
 409                         g_free(filename);
 410                         return NULL;
 411                 }
 412
 413                 if ((fp = fopen(filename, "rb")) == NULL) {
 414                         FILE_OP_ERROR(filename, "fopen");
 415                         g_free(filename);
 416                         return NULL;
 417                 }
 418         }
 419
 420         while (fgets(buf, sizeof(buf), fp) != NULL) {
 421                 gchar *p = buf;
 422                 gchar *name;
 423                 gint last_num;
 424                 gint first_num;
 425                 gchar type;
 426                 NewsGroupInfo *ginfo;
 427
 428                 p = strchr(p, ' ');
 429                 if (!p) continue;
 430                 *p = '\0';
 431                 p++;
 432                 name = buf;
 433
 434                 if (sscanf(p, "%d %d %c", &last_num, &first_num, &type) < 3)
 435                         continue;
 436
 437                 ginfo = news_group_info_new(name, first_num, last_num, type);
 438
 439                 if (!last)
 440                         last = list = g_slist_append(NULL, ginfo);
 441                 else {
 442                         last = g_slist_append(last, ginfo);
 443                         last = last->next;
 444                 }
 445         }
 446
 447         fclose(fp);
 448         g_free(filename);
 449
 450         list = g_slist_sort(list, (GCompareFunc)news_group_info_compare);
 451
 452         return list;
 453 }
 454
 455 void news_group_list_free(GSList *group_list)
 456 {
 457         GSList *cur;
 458
 459         if (!group_list) return;
 460
 461         for (cur = group_list; cur != NULL; cur = cur->next)
 462                 news_group_info_free((NewsGroupInfo *)cur->data);
 463         g_slist_free(group_list);
 464 }
 465
 466 void news_remove_group_list_cache(Folder *folder)
 467 {
 468         gchar *path, *filename;
 469
 470         g_return_if_fail(folder != NULL);
 471         g_return_if_fail(FOLDER_CLASS(folder) == &news_class);
 472
 473         path = folder_item_get_path(FOLDER_ITEM(folder->node->data));
 474         filename = g_strconcat(path, G_DIR_SEPARATOR_S, NEWSGROUP_LIST, NULL);
 475         g_free(path);
 476
 477         if (is_file_exist(filename)) {
 478                 if (remove(filename) < 0)
 479                         FILE_OP_ERROR(filename, "remove");
 480         }
 481         g_free(filename);
 482 }
 483
 484 gint news_post(Folder *folder, const gchar *file)
 485 {
 486         FILE *fp;
 487         gint ok;
 488
 489         g_return_val_if_fail(folder != NULL, -1);
 490         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 491         g_return_val_if_fail(file != NULL, -1);
 492
 493         if ((fp = fopen(file, "rb")) == NULL) {
 494                 FILE_OP_ERROR(file, "fopen");
 495                 return -1;
 496         }
 497
 498         ok = news_post_stream(folder, fp);
 499
 500         fclose(fp);
 501
 502         return ok;
 503 }
 504
 505 gint news_post_stream(Folder *folder, FILE *fp)
 506 {
 507         NNTPSession *session;
 508         gint ok;
 509
 510         g_return_val_if_fail(folder != NULL, -1);
 511         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 512         g_return_val_if_fail(fp != NULL, -1);
 513
 514         session = news_session_get(folder);
 515         if (!session) return -1;
 516
 517         ok = nntp_post(session, fp);
 518         if (ok != NN_SUCCESS) {
 519                 log_warning(_("can't post article.\n"));
 520                 if (ok == NN_SOCKET) {
 521                         session_destroy(SESSION(session));
 522                         REMOTE_FOLDER(folder)->session = NULL;
 523                 }
 524                 return -1;
 525         }
 526
 527         return 0;
 528 }
 529
 530 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 531                                  gint num, gchar *filename)
 532 {
 533         gchar *msgid;
 534         gint ok;
 535
 536         ok = nntp_get_article(session, cmd, num, &msgid);
 537         if (ok != NN_SUCCESS)
 538                 return ok;
 539
 540         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 541         g_free(msgid);
 542
 543         ok = recv_write_to_file(SESSION(session)->sock, filename);
 544         if (ok < 0) {
 545                 log_warning(_("can't retrieve article %d\n"), num);
 546                 if (ok == -2)
 547                         return NN_SOCKET;
 548                 else
 549                         return NN_IOERR;
 550         }
 551
 552         return NN_SUCCESS;
 553 }
 554
 555 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 556 {
 557         return news_get_article_cmd(session, "ARTICLE", num, filename);
 558 }
 559
 560 /**
 561  * news_select_group:
 562  * @session: Active NNTP session.
 563  * @group: Newsgroup name.
 564  * @num: Estimated number of articles.
 565  * @first: First article number.
 566  * @last: Last article number.
 567  *
 568  * Select newsgroup @group with the GROUP command if it is not already
 569  * selected in @session, or article numbers need to be returned.
 570  *
 571  * Return value: NNTP result code.
 572  **/
 573 static gint news_select_group(NNTPSession *session, const gchar *group,
 574                               gint *num, gint *first, gint *last)
 575 {
 576         gint ok;
 577         gint num_, first_, last_;
 578
 579         if (!num || !first || !last) {
 580                 if (session->group && g_strcasecmp(session->group, group) == 0)
 581                         return NN_SUCCESS;
 582                 num = &num_;
 583                 first = &first_;
 584                 last = &last_;
 585         }
 586
 587         g_free(session->group);
 588         session->group = NULL;
 589
 590         ok = nntp_group(session, group, num, first, last);
 591         if (ok == NN_SUCCESS)
 592                 session->group = g_strdup(group);
 593         else
 594                 log_warning(_("can't select group: %s\n"), group);
 595
 596         return ok;
 597 }
 598
 599 #define PARSE_ONE_PARAM(p, srcp) \
 600 { \
 601         p = strchr(srcp, '\t'); \
 602         if (!p) return NULL; \
 603         else \
 604                 *p++ = '\0'; \
 605 }
 606
 607 static MsgInfo *news_parse_xover(const gchar *xover_str)
 608 {
 609         MsgInfo *msginfo;
 610         gchar buf[NNTPBUFSIZE];
 611         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp;
 612         gchar *p;
 613         gint num, size_int, line_int;
 614         gchar *xover_buf;
 615
 616         Xstrdup_a(xover_buf, xover_str, return NULL);
 617
 618         PARSE_ONE_PARAM(subject, xover_buf);
 619         PARSE_ONE_PARAM(sender, subject);
 620         PARSE_ONE_PARAM(date, sender);
 621         PARSE_ONE_PARAM(msgid, date);
 622         PARSE_ONE_PARAM(ref, msgid);
 623         PARSE_ONE_PARAM(size, ref);
 624         PARSE_ONE_PARAM(line, size);
 625         /*
 626          * PARSE_ONE_PARAM(xref, line);
 627          *
 628          * if we parse extra headers we should first examine the
 629          * LIST OVERVIEW.FMT response from the server. See
 630          * RFC2980 for details
 631          */
 632
 633         tmp = strchr(line, '\t');
 634         if (!tmp) tmp = strchr(line, '\r');
 635         if (!tmp) tmp = strchr(line, '\n');
 636         if (tmp) *tmp = '\0';
 637
 638         num = atoi(xover_str);
 639         size_int = atoi(size);
 640         line_int = atoi(line);
 641
 642         /* set MsgInfo */
 643         msginfo = procmsg_msginfo_new();
 644         msginfo->msgnum = num;
 645         msginfo->size = size_int;
 646
 647         msginfo->date = g_strdup(date);
 648         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 649
 650         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 651         msginfo->from = g_strdup(buf);
 652         msginfo->fromname = procheader_get_fromname(buf);
 653
 654         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 655         msginfo->subject = g_strdup(buf);
 656
 657         extract_parenthesis(msgid, '<', '>');
 658         remove_space(msgid);
 659         if (*msgid != '\0')
 660                 msginfo->msgid = g_strdup(msgid);
 661
 662         msginfo->references = g_strdup(ref);
 663         eliminate_parenthesis(ref, '(', ')');
 664         if ((p = strrchr(ref, '<')) != NULL) {
 665                 extract_parenthesis(p, '<', '>');
 666                 remove_space(p);
 667                 if (*p != '\0')
 668                         msginfo->inreplyto = g_strdup(p);
 669         }
 670
 671         /*
 672         msginfo->xref = g_strdup(xref);
 673         p = msginfo->xref+strlen(msginfo->xref) - 1;
 674         while (*p == '\r' || *p == '\n') {
 675                 *p = '\0';
 676                 p--;
 677         }
 678         */
 679
 680         return msginfo;
 681 }
 682
 683 static gchar *news_parse_xhdr(const gchar *xhdr_str, MsgInfo *msginfo)
 684 {
 685         gchar *p;
 686         gchar *tmp;
 687         gint num;
 688
 689         p = strchr(xhdr_str, ' ');
 690         if (!p)
 691                 return NULL;
 692         else
 693                 p++;
 694
 695         num = atoi(xhdr_str);
 696         if (msginfo->msgnum != num) return NULL;
 697
 698         tmp = strchr(p, '\r');
 699         if (!tmp) tmp = strchr(p, '\n');
 700
 701         if (tmp)
 702                 return g_strndup(p, tmp - p);
 703         else
 704                 return g_strdup(p);
 705 }
 706
 707 gint news_cancel_article(Folder * folder, MsgInfo * msginfo)
 708 {
 709         gchar * tmp;
 710         FILE * tmpfp;
 711         gchar buf[BUFFSIZE];
 712
 713         tmp = g_strdup_printf("%s%ctmp%d", g_get_tmp_dir(),
 714                               G_DIR_SEPARATOR, (gint)msginfo);
 715         if (tmp == NULL)
 716                 return -1;
 717
 718         if ((tmpfp = fopen(tmp, "wb")) == NULL) {
 719                 FILE_OP_ERROR(tmp, "fopen");
 720                 return -1;
 721         }
 722         if (change_file_mode_rw(tmpfp, tmp) < 0) {
 723                 FILE_OP_ERROR(tmp, "chmod");
 724                 g_warning("can't change file mode\n");
 725         }
 726
 727         fprintf(tmpfp, "From: %s\r\n", msginfo->from);
 728         fprintf(tmpfp, "Newsgroups: %s\r\n", msginfo->newsgroups);
 729         fprintf(tmpfp, "Subject: cmsg cancel <%s>\r\n", msginfo->msgid);
 730         fprintf(tmpfp, "Control: cancel <%s>\r\n", msginfo->msgid);
 731         fprintf(tmpfp, "Approved: %s\r\n", msginfo->from);
 732         fprintf(tmpfp, "X-Cancelled-by: %s\r\n", msginfo->from);
 733         get_rfc822_date(buf, sizeof(buf));
 734         fprintf(tmpfp, "Date: %s\r\n", buf);
 735         fprintf(tmpfp, "\r\n");
 736         fprintf(tmpfp, "removed with sylpheed\r\n");
 737
 738         fclose(tmpfp);
 739
 740         news_post(folder, tmp);
 741         remove(tmp);
 742
 743         g_free(tmp);
 744
 745         return 0;
 746 }
 747
 748 static gchar *news_folder_get_path(Folder *folder)
 749 {
 750         gchar *folder_path;
 751
 752         g_return_val_if_fail(folder->account != NULL, NULL);
 753
 754         folder_path = g_strconcat(get_news_cache_dir(),
 755                                   G_DIR_SEPARATOR_S,
 756                                   folder->account->nntp_server,
 757                                   NULL);
 758         return folder_path;
 759 }
 760
 761 gchar *news_item_get_path(Folder *folder, FolderItem *item)
 762 {
 763         gchar *folder_path, *path;
 764
 765         g_return_val_if_fail(folder != NULL, NULL);
 766         g_return_val_if_fail(item != NULL, NULL);
 767         folder_path = news_folder_get_path(folder);
 768
 769         g_return_val_if_fail(folder_path != NULL, NULL);
 770         if (folder_path[0] == G_DIR_SEPARATOR) {
 771                 if (item->path)
 772                         path = g_strconcat(folder_path, G_DIR_SEPARATOR_S,
 773                                            item->path, NULL);
 774                 else
 775                         path = g_strdup(folder_path);
 776         } else {
 777                 if (item->path)
 778                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 779                                            folder_path, G_DIR_SEPARATOR_S,
 780                                            item->path, NULL);
 781                 else
 782                         path = g_strconcat(get_home_dir(), G_DIR_SEPARATOR_S,
 783                                            folder_path, NULL);
 784         }
 785         g_free(folder_path);
 786
 787         return path;
 788 }
 789
 790 gint news_get_num_list(Folder *folder, FolderItem *item, GSList **msgnum_list, gboolean *old_uids_valid)
 791 {
 792         NNTPSession *session;
 793         gint i, ok, num, first, last, nummsgs = 0;
 794         gchar *dir;
 795
 796         g_return_val_if_fail(item != NULL, -1);
 797         g_return_val_if_fail(item->folder != NULL, -1);
 798         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, -1);
 799
 800         session = news_session_get(folder);
 801         g_return_val_if_fail(session != NULL, -1);
 802
 803         *old_uids_valid = TRUE;
 804
 805         ok = news_select_group(session, item->path, &num, &first, &last);
 806         if (ok != NN_SUCCESS) {
 807                 log_warning(_("can't set group: %s\n"), item->path);
 808                 return -1;
 809         }
 810
 811         dir = news_folder_get_path(folder);
 812         if (num <= 0)
 813                 remove_all_numbered_files(dir);
 814         else if (last < first)
 815                 log_warning(_("invalid article range: %d - %d\n"),
 816                             first, last);
 817         else {
 818                 for (i = first; i <= last; i++) {
 819                         *msgnum_list = g_slist_prepend(*msgnum_list,
 820                                                        GINT_TO_POINTER(i));
 821                         nummsgs++;
 822                 }
 823                 debug_print("removing old messages from %d to %d in %s\n",
 824                             first, last, dir);
 825                 remove_numbered_files(dir, 1, first - 1);
 826         }
 827         g_free(dir);
 828
 829         return nummsgs;
 830 }
 831
 832 #define READ_TO_LISTEND(hdr) \
 833         while (!(buf[0] == '.' && buf[1] == '\r')) { \
 834                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) { \
 835                         log_warning(_("error occurred while getting %s.\n"), hdr); \
 836                         return msginfo; \
 837                 } \
 838         }
 839
 840 MsgInfo *news_get_msginfo(Folder *folder, FolderItem *item, gint num)
 841 {
 842         NNTPSession *session;
 843         MsgInfo *msginfo = NULL;
 844         gchar buf[NNTPBUFSIZE];
 845         gint ok;
 846
 847         session = news_session_get(folder);
 848         g_return_val_if_fail(session != NULL, NULL);
 849         g_return_val_if_fail(item != NULL, NULL);
 850         g_return_val_if_fail(item->folder != NULL, NULL);
 851         g_return_val_if_fail(FOLDER_CLASS(item->folder) == &news_class, NULL);
 852
 853         log_message(_("getting xover %d in %s...\n"),
 854                     num, item->path);
 855         ok = nntp_xover(session, num, num);
 856         if (ok != NN_SUCCESS) {
 857                 log_warning(_("can't get xover\n"));
 858                 if (ok == NN_SOCKET) {
 859                         session_destroy(SESSION(session));
 860                         REMOTE_FOLDER(item->folder)->session = NULL;
 861                 }
 862                 return NULL;
 863         }
 864
 865         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 866                 log_warning(_("error occurred while getting xover.\n"));
 867                 return NULL;
 868         }
 869
 870         msginfo = news_parse_xover(buf);
 871         if (!msginfo) {
 872                 log_warning(_("invalid xover line: %s\n"), buf);
 873         }
 874
 875         READ_TO_LISTEND("xover");
 876
 877         if(!msginfo)
 878                 return NULL;
 879
 880         msginfo->folder = item;
 881         msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 882         msginfo->flags.tmp_flags = MSG_NEWS;
 883         msginfo->newsgroups = g_strdup(item->path);
 884
 885         ok = nntp_xhdr(session, "to", num, num);
 886         if (ok != NN_SUCCESS) {
 887                 log_warning(_("can't get xhdr\n"));
 888                 if (ok == NN_SOCKET) {
 889                         session_destroy(SESSION(session));
 890                         REMOTE_FOLDER(item->folder)->session = NULL;
 891                 }
 892                 return msginfo;
 893         }
 894
 895         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 896                 log_warning(_("error occurred while getting xhdr.\n"));
 897                 return msginfo;
 898         }
 899
 900         msginfo->to = news_parse_xhdr(buf, msginfo);
 901
 902         READ_TO_LISTEND("xhdr (to)");
 903
 904         ok = nntp_xhdr(session, "cc", num, num);
 905         if (ok != NN_SUCCESS) {
 906                 log_warning(_("can't get xhdr\n"));
 907                 if (ok == NN_SOCKET) {
 908                         session_destroy(SESSION(session));
 909                         REMOTE_FOLDER(item->folder)->session = NULL;
 910                 }
 911                 return msginfo;
 912         }
 913
 914         if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 915                 log_warning(_("error occurred while getting xhdr.\n"));
 916                 return msginfo;
 917         }
 918
 919         msginfo->cc = news_parse_xhdr(buf, msginfo);
 920
 921         READ_TO_LISTEND("xhdr (cc)");
 922
 923         return msginfo;
 924 }
 925
 926 static GSList *news_get_msginfos_for_range(NNTPSession *session, FolderItem *item, guint begin, guint end)
 927 {
 928         gchar buf[NNTPBUFSIZE];
 929         GSList *newlist = NULL;
 930         GSList *llast = NULL;
 931         MsgInfo *msginfo;
 932         guint count = 0, lines = (end - begin + 2) * 3;
 933         gint ok;
 934
 935         g_return_val_if_fail(session != NULL, NULL);
 936         g_return_val_if_fail(item != NULL, NULL);
 937
 938         log_message(_("getting xover %d - %d in %s...\n"),
 939                     begin, end, item->path);
 940         ok = nntp_xover(session, begin, end);
 941         if (ok != NN_SUCCESS) {
 942                 log_warning(_("can't get xover\n"));
 943                 if (ok == NN_SOCKET) {
 944                         session_destroy(SESSION(session));
 945                         REMOTE_FOLDER(item->folder)->session = NULL;
 946                 }
 947                 return NULL;
 948         }
 949
 950         for (;;) {
 951                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 952                         log_warning(_("error occurred while getting xover.\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
 963                 msginfo = news_parse_xover(buf);
 964                 if (!msginfo) {
 965                         log_warning(_("invalid xover line: %s\n"), buf);
 966                         continue;
 967                 }
 968
 969                 msginfo->folder = item;
 970                 msginfo->flags.perm_flags = MSG_NEW|MSG_UNREAD;
 971                 msginfo->flags.tmp_flags = MSG_NEWS;
 972                 msginfo->newsgroups = g_strdup(item->path);
 973
 974                 if (!newlist)
 975                         llast = newlist = g_slist_append(newlist, msginfo);
 976                 else {
 977                         llast = g_slist_append(llast, msginfo);
 978                         llast = llast->next;
 979                 }
 980         }
 981
 982         ok = nntp_xhdr(session, "to", begin, end);
 983         if (ok != NN_SUCCESS) {
 984                 log_warning(_("can't get xhdr\n"));
 985                 if (ok == NN_SOCKET) {
 986                         session_destroy(SESSION(session));
 987                         REMOTE_FOLDER(item->folder)->session = NULL;
 988                 }
 989                 return newlist;
 990         }
 991
 992         llast = newlist;
 993
 994         for (;;) {
 995                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 996                         log_warning(_("error occurred while getting xhdr.\n"));
 997                         return newlist;
 998                 }
 999                 count++;
1000                 progressindicator_set_percentage
1001                         (PROGRESS_TYPE_NETWORK,
1002                          session->fetch_base_percentage +
1003                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
1004
1005                 if (buf[0] == '.' && buf[1] == '\r') break;
1006                 if (!llast) {
1007                         g_warning("llast == NULL\n");
1008                         continue;
1009                 }
1010
1011                 msginfo = (MsgInfo *)llast->data;
1012                 msginfo->to = news_parse_xhdr(buf, msginfo);
1013
1014                 llast = llast->next;
1015         }
1016
1017         ok = nntp_xhdr(session, "cc", begin, end);
1018         if (ok != NN_SUCCESS) {
1019                 log_warning(_("can't get xhdr\n"));
1020                 if (ok == NN_SOCKET) {
1021                         session_destroy(SESSION(session));
1022                         REMOTE_FOLDER(item->folder)->session = NULL;
1023                 }
1024                 return newlist;
1025         }
1026
1027         llast = newlist;
1028
1029         for (;;) {
1030                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
1031                         log_warning(_("error occurred while getting xhdr.\n"));
1032                         return newlist;
1033                 }
1034                 count++;
1035                 progressindicator_set_percentage
1036                         (PROGRESS_TYPE_NETWORK,
1037                          session->fetch_base_percentage +
1038                          (((gfloat) count) / ((gfloat) lines)) * session->fetch_total_percentage);
1039
1040                 if (buf[0] == '.' && buf[1] == '\r') break;
1041                 if (!llast) {
1042                         g_warning("llast == NULL\n");
1043                         continue;
1044                 }
1045
1046                 msginfo = (MsgInfo *)llast->data;
1047                 msginfo->cc = news_parse_xhdr(buf, msginfo);
1048
1049                 llast = llast->next;
1050         }
1051
1052         return newlist;
1053 }
1054
1055 GSList *news_get_msginfos(Folder *folder, FolderItem *item, GSList *msgnum_list)
1056 {
1057         NNTPSession *session;
1058         GSList *elem, *msginfo_list = NULL, *tmp_msgnum_list, *tmp_msginfo_list;
1059         guint first, last, next;
1060         guint tofetch, fetched;
1061
1062         g_return_val_if_fail(folder != NULL, NULL);
1063         g_return_val_if_fail(FOLDER_CLASS(folder) == &news_class, NULL);
1064         g_return_val_if_fail(msgnum_list != NULL, NULL);
1065         g_return_val_if_fail(item != NULL, NULL);
1066
1067         session = news_session_get(folder);
1068         g_return_val_if_fail(session != NULL, NULL);
1069
1070         tmp_msgnum_list = g_slist_copy(msgnum_list);
1071         tmp_msgnum_list = g_slist_sort(tmp_msgnum_list, g_int_compare);
1072
1073         progressindicator_start(PROGRESS_TYPE_NETWORK);
1074         tofetch = g_slist_length(tmp_msgnum_list);
1075         fetched = 0;
1076
1077         first = GPOINTER_TO_INT(tmp_msgnum_list->data);
1078         last = first;
1079         for(elem = g_slist_next(tmp_msgnum_list); elem != NULL; elem = g_slist_next(elem)) {
1080                 next = GPOINTER_TO_INT(elem->data);
1081                 if(next != (last + 1)) {
1082                         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1083                         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1084                         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1085                         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1086                         fetched = last - first + 1;
1087                         first = next;
1088                 }
1089                 last = next;
1090         }
1091         session->fetch_base_percentage = ((gfloat) fetched) / ((gfloat) tofetch);
1092         session->fetch_total_percentage = ((gfloat) (last - first + 1)) / ((gfloat) tofetch);
1093         tmp_msginfo_list = news_get_msginfos_for_range(session, item, first, last);
1094         msginfo_list = g_slist_concat(msginfo_list, tmp_msginfo_list);
1095
1096         g_slist_free(tmp_msgnum_list);
1097
1098         progressindicator_stop(PROGRESS_TYPE_NETWORK);
1099
1100         return msginfo_list;
1101 }
1102
1103 gboolean news_scan_required(Folder *folder, FolderItem *item)
1104 {
1105         return TRUE;
1106 }