src/news.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999,2000 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 <glib.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #include <dirent.h>
  29 #include <unistd.h>
  30
  31 #include "intl.h"
  32 #include "news.h"
  33 #include "nntp.h"
  34 #include "socket.h"
  35 #include "recv.h"
  36 #include "procmsg.h"
  37 #include "procheader.h"
  38 #include "folder.h"
  39 #include "session.h"
  40 #include "statusbar.h"
  41 #include "codeconv.h"
  42 #include "utils.h"
  43 #include "prefs_common.h"
  44
  45 static gint news_get_article_cmd         (NNTPSession   *session,
  46                                           const gchar   *cmd,
  47                                           gint           num,
  48                                           gchar         *filename);
  49 static gint news_get_article             (NNTPSession   *session,
  50                                           gint           num,
  51                                           gchar         *filename);
  52 static gint news_get_header              (NNTPSession   *session,
  53                                           gint           num,
  54                                           gchar         *filename);
  55
  56 static GSList *news_get_uncached_articles(NNTPSession   *session,
  57                                           FolderItem    *item,
  58                                           gint           cache_last,
  59                                           gint          *rfirst,
  60                                           gint          *rlast);
  61 static MsgInfo *news_parse_xover         (const gchar   *xover_str);
  62 static GSList *news_delete_old_article   (GSList        *alist,
  63                                           gint           first);
  64 static void news_delete_all_article      (FolderItem    *item);
  65
  66
  67 Session *news_session_new(const gchar *server, gushort port)
  68 {
  69         gchar buf[NNTPBUFSIZE];
  70         NNTPSession *session;
  71         gint nntp_sock;
  72
  73         g_return_val_if_fail(server != NULL, NULL);
  74
  75         log_message(_("creating NNTP connection to %s:%d ...\n"), server, port);
  76
  77         if ((nntp_sock = nntp_open(server, port, buf)) < 0)
  78                 return NULL;
  79
  80         session = g_new(NNTPSession, 1);
  81         SESSION(session)->type      = SESSION_NEWS;
  82         SESSION(session)->server    = g_strdup(server);
  83         SESSION(session)->sock      = nntp_sock;
  84         SESSION(session)->connected = TRUE;
  85         SESSION(session)->phase     = SESSION_READY;
  86         SESSION(session)->data      = NULL;
  87         session->group = NULL;
  88
  89         return SESSION(session);
  90 }
  91
  92 void news_session_destroy(NNTPSession *session)
  93 {
  94         close(SESSION(session)->sock);
  95
  96         g_free(session->group);
  97 }
  98
  99 NNTPSession *news_session_get(Folder *folder)
 100 {
 101         g_return_val_if_fail(folder != NULL, NULL);
 102         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 103         g_return_val_if_fail(folder->account != NULL, NULL);
 104
 105         if (!REMOTE_FOLDER(folder)->session) {
 106                 REMOTE_FOLDER(folder)->session =
 107                         news_session_new(folder->account->nntp_server, 119);
 108         } else {
 109                 if (nntp_mode(REMOTE_FOLDER(folder)->session->sock, FALSE)
 110                     != NN_SUCCESS) {
 111                         log_warning(_("NNTP connection to %s:%d has been"
 112                                       " disconnected. Reconnecting...\n"),
 113                                     folder->account->nntp_server, 119);
 114                         session_destroy(REMOTE_FOLDER(folder)->session);
 115                         REMOTE_FOLDER(folder)->session =
 116                                 news_session_new(folder->account->nntp_server,
 117                                                  119);
 118                 }
 119         }
 120
 121         return NNTP_SESSION(REMOTE_FOLDER(folder)->session);
 122 }
 123
 124 GSList *news_get_article_list(Folder *folder, FolderItem *item,
 125                               gboolean use_cache)
 126 {
 127         GSList *alist;
 128         NNTPSession *session;
 129
 130         g_return_val_if_fail(folder != NULL, NULL);
 131         g_return_val_if_fail(item != NULL, NULL);
 132         g_return_val_if_fail(folder->type == F_NEWS, NULL);
 133
 134         session = news_session_get(folder);
 135
 136         if (!session) {
 137                 alist = procmsg_read_cache(item, FALSE);
 138                 item->last_num = procmsg_get_last_num_in_cache(alist);
 139         } else if (use_cache) {
 140                 GSList *newlist;
 141                 gint cache_last;
 142                 gint first, last;
 143
 144                 alist = procmsg_read_cache(item, FALSE);
 145
 146                 cache_last = procmsg_get_last_num_in_cache(alist);
 147                 newlist = news_get_uncached_articles
 148                         (session, item, cache_last, &first, &last);
 149                 alist = news_delete_old_article(alist, first);
 150
 151                 alist = g_slist_concat(alist, newlist);
 152                 item->last_num = last;
 153         } else {
 154                 gint last;
 155
 156                 alist = news_get_uncached_articles
 157                         (session, item, 0, NULL, &last);
 158                 news_delete_all_article(item);
 159                 item->last_num = last;
 160         }
 161
 162         procmsg_set_flags(alist, item);
 163
 164         statusbar_pop_all();
 165
 166         return alist;
 167 }
 168
 169 gchar *news_fetch_msg(Folder *folder, FolderItem *item, gint num)
 170 {
 171         gchar *path, *filename;
 172         gint ok;
 173
 174         g_return_val_if_fail(folder != NULL, NULL);
 175         g_return_val_if_fail(item != NULL, NULL);
 176
 177         path = folder_item_get_path(item);
 178         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 179         g_free(path);
 180
 181         if (is_file_exist(filename)) {
 182                 debug_print(_("article %d has been already cached.\n"), num);
 183                 return filename;
 184         }
 185
 186         if (!REMOTE_FOLDER(folder)->session) {
 187                 g_free(filename);
 188                 return NULL;
 189         }
 190
 191         debug_print(_("getting article %d...\n"), num);
 192         ok = news_get_article(NNTP_SESSION(REMOTE_FOLDER(folder)->session),
 193                               num, filename);
 194         statusbar_pop_all();
 195         if (ok < 0) {
 196                 g_warning(_("can't read article %d\n"), num);
 197                 g_free(filename);
 198                 return NULL;
 199         }
 200
 201         return filename;
 202 }
 203
 204 void news_scan_group(Folder *folder, FolderItem *item)
 205 {
 206 }
 207
 208 gint news_post(Folder *folder, const gchar *file)
 209 {
 210         NNTPSession *session;
 211         FILE *fp;
 212         gint ok;
 213
 214         g_return_val_if_fail(folder != NULL, -1);
 215         g_return_val_if_fail(folder->type == F_NEWS, -1);
 216         g_return_val_if_fail(file != NULL, -1);
 217
 218         session = news_session_get(folder);
 219         if (!session) return -1;
 220
 221         if ((fp = fopen(file, "r")) == NULL) {
 222                 FILE_OP_ERROR(file, "fopen");
 223                 return -1;
 224         }
 225
 226         ok = nntp_post(SESSION(session)->sock, fp);
 227         if (ok != NN_SUCCESS) {
 228                 log_warning(_("can't post article.\n"));
 229                 return -1;
 230         }
 231
 232         fclose(fp);
 233
 234         statusbar_pop_all();
 235
 236         return 0;
 237 }
 238
 239 static gint news_get_article_cmd(NNTPSession *session, const gchar *cmd,
 240                                  gint num, gchar *filename)
 241 {
 242         gchar *msgid;
 243
 244         if (nntp_get_article(SESSION(session)->sock, cmd, num, &msgid)
 245             != NN_SUCCESS)
 246                 return -1;
 247
 248         debug_print("Message-Id = %s, num = %d\n", msgid, num);
 249         g_free(msgid);
 250
 251         if (recv_write_to_file(SESSION(session)->sock, filename) < 0) {
 252                 log_warning(_("can't retrieve article %d\n"), num);
 253                 return -1;
 254         }
 255
 256         return 0;
 257 }
 258
 259 static gint news_get_article(NNTPSession *session, gint num, gchar *filename)
 260 {
 261         return news_get_article_cmd(session, "ARTICLE", num, filename);
 262 }
 263
 264 static gint news_get_header(NNTPSession *session, gint num, gchar *filename)
 265 {
 266         return news_get_article_cmd(session, "HEAD", num, filename);
 267 }
 268
 269 static GSList *news_get_uncached_articles(NNTPSession *session,
 270                                           FolderItem *item, gint cache_last,
 271                                           gint *rfirst, gint *rlast)
 272 {
 273         gint ok;
 274         gint num = 0, first = 0, last = 0, begin = 0, end = 0;
 275         gchar buf[NNTPBUFSIZE];
 276         GSList *newlist = NULL;
 277         GSList *llast = NULL;
 278         MsgInfo *msginfo;
 279
 280         if (rfirst) *rfirst = 0;
 281         if (rlast)  *rlast  = 0;
 282
 283         g_return_val_if_fail(session != NULL, NULL);
 284         g_return_val_if_fail(item != NULL, NULL);
 285         g_return_val_if_fail(item->folder != NULL, NULL);
 286         g_return_val_if_fail(item->folder->type == F_NEWS, NULL);
 287
 288         ok = nntp_group(SESSION(session)->sock, item->path,
 289                         &num, &first, &last);
 290         if (ok != NN_SUCCESS) {
 291                 log_warning(_("can't set group: %s\n"), item->path);
 292                 return NULL;
 293         }
 294
 295         /* calculate getting overview range */
 296         if (first > last) {
 297                 log_warning(_("invalid article range: %d - %d\n"),
 298                             first, last);
 299                 return NULL;
 300         }
 301         if (cache_last < first)
 302                 begin = first;
 303         else if (last < cache_last)
 304                 begin = first;
 305         else if (last == cache_last) {
 306                 debug_print(_("no new articles.\n"));
 307                 return NULL;
 308         } else
 309                 begin = cache_last + 1;
 310         end = last;
 311
 312         if (prefs_common.max_articles > 0 &&
 313             end - begin + 1 > prefs_common.max_articles)
 314                 begin = end - prefs_common.max_articles + 1;
 315
 316         log_message(_("getting xover %d - %d in %s...\n"),
 317                     begin, end, item->path);
 318         if (nntp_xover(SESSION(session)->sock, begin, end) != NN_SUCCESS) {
 319                 log_warning(_("can't get xover\n"));
 320                 return NULL;
 321         }
 322
 323         for (;;) {
 324                 if (sock_read(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 325                         log_warning(_("error occurred while getting xover.\n"));
 326                         return newlist;
 327                 }
 328
 329                 if (buf[0] == '.' && buf[1] == '\r') break;
 330
 331                 msginfo = news_parse_xover(buf);
 332                 if (!msginfo) {
 333                         log_warning(_("invalid xover line: %s\n"), buf);
 334                         continue;
 335                 }
 336
 337                 msginfo->folder = item;
 338                 msginfo->flags = MSG_NEW|MSG_UNREAD|MSG_NEWS;
 339
 340                 if (!newlist)
 341                         llast = newlist = g_slist_append(newlist, msginfo);
 342                 else {
 343                         llast = g_slist_append(llast, msginfo);
 344                         llast = llast->next;
 345                 }
 346         }
 347
 348         if (rfirst) *rfirst = first;
 349         if (rlast)  *rlast  = last;
 350         return newlist;
 351 }
 352
 353 #define PARSE_ONE_PARAM(p, srcp) \
 354 { \
 355         p = strchr(srcp, '\t'); \
 356         if (!p) return NULL; \
 357         else \
 358                 *p++ = '\0'; \
 359 }
 360
 361 static MsgInfo *news_parse_xover(const gchar *xover_str)
 362 {
 363         MsgInfo *msginfo;
 364         gchar buf[NNTPBUFSIZE];
 365         gchar *subject, *sender, *size, *line, *date, *msgid, *ref, *tmp;
 366         gchar *p;
 367         gint num, size_int, line_int;
 368         gchar *xover_buf;
 369
 370         Xalloca(xover_buf, strlen(xover_str) + 1, return NULL);
 371         strcpy(xover_buf, xover_str);
 372
 373         PARSE_ONE_PARAM(subject, xover_buf);
 374         PARSE_ONE_PARAM(sender, subject);
 375         PARSE_ONE_PARAM(date, sender);
 376         PARSE_ONE_PARAM(msgid, date);
 377         PARSE_ONE_PARAM(ref, msgid);
 378         PARSE_ONE_PARAM(size, ref);
 379         PARSE_ONE_PARAM(line, size);
 380
 381         tmp = strchr(line, '\t');
 382         if (!tmp) tmp = strchr(line, '\r');
 383         if (!tmp) tmp = strchr(line, '\n');
 384         if (tmp) *tmp = '\0';
 385
 386         num = atoi(xover_str);
 387         size_int = atoi(size);
 388         line_int = atoi(line);
 389
 390         /* set MsgInfo */
 391         msginfo = g_new0(MsgInfo, 1);
 392         msginfo->msgnum = num;
 393         msginfo->size = size_int;
 394
 395         msginfo->date = g_strdup(date);
 396         msginfo->date_t = procheader_date_parse(NULL, date, 0);
 397
 398         conv_unmime_header(buf, sizeof(buf), sender, NULL);
 399         msginfo->from = g_strdup(buf);
 400         msginfo->fromname = procheader_get_fromname(buf);
 401
 402         conv_unmime_header(buf, sizeof(buf), subject, NULL);
 403         msginfo->subject = g_strdup(buf);
 404
 405         extract_parenthesis(msgid, '<', '>');
 406         remove_space(msgid);
 407         if (*msgid != '\0')
 408                 msginfo->msgid = g_strdup(msgid);
 409
 410         eliminate_parenthesis(ref, '(', ')');
 411         if ((p = strrchr(ref, '<')) != NULL) {
 412                 extract_parenthesis(p, '<', '>');
 413                 remove_space(p);
 414                 if (*p != '\0')
 415                         msginfo->inreplyto = g_strdup(p);
 416         }
 417
 418         return msginfo;
 419 }
 420
 421 static GSList *news_delete_old_article(GSList *alist, gint first)
 422 {
 423         GSList *cur, *next;
 424         MsgInfo *msginfo;
 425         gchar *cache_file;
 426
 427         if (first < 2) return alist;
 428
 429         for (cur = alist; cur != NULL; ) {
 430                 next = cur->next;
 431
 432                 msginfo = (MsgInfo *)cur->data;
 433                 if (msginfo && msginfo->msgnum < first) {
 434                         debug_print(_("deleting article %d...\n"),
 435                                     msginfo->msgnum);
 436
 437                         cache_file = procmsg_get_message_file_path(msginfo);
 438                         if (is_file_exist(cache_file)) unlink(cache_file);
 439                         g_free(cache_file);
 440
 441                         procmsg_msginfo_free(msginfo);
 442                         alist = g_slist_remove(alist, msginfo);
 443                 }
 444
 445                 cur = next;
 446         }
 447
 448         return alist;
 449 }
 450
 451 static void news_delete_all_article(FolderItem *item)
 452 {
 453         DIR *dp;
 454         struct dirent *d;
 455         gchar *dir;
 456         gchar *file;
 457
 458         dir = folder_item_get_path(item);
 459         if ((dp = opendir(dir)) == NULL) {
 460                 FILE_OP_ERROR(dir, "opendir");
 461                 g_free(dir);
 462                 return;
 463         }
 464
 465         debug_print(_("\tDeleting all cached articles... "));
 466
 467         while ((d = readdir(dp)) != NULL) {
 468                 if (to_number(d->d_name) < 0) continue;
 469
 470                 file = g_strconcat(dir, G_DIR_SEPARATOR_S, d->d_name, NULL);
 471
 472                 if (is_file_exist(file)) {
 473                         if (unlink(file) < 0)
 474                                 FILE_OP_ERROR(file, "unlink");
 475                 }
 476
 477                 g_free(file);
 478         }
 479
 480         closedir(dp);
 481         g_free(dir);
 482
 483         debug_print(_("done.\n"));
 484 }