src/imap.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 "imap.h"
  33 #include "socket.h"
  34 #include "recv.h"
  35 #include "procmsg.h"
  36 #include "procheader.h"
  37 #include "folder.h"
  38 #include "statusbar.h"
  39 #include "prefs_account.h"
  40 #include "codeconv.h"
  41 #include "utils.h"
  42
  43 static GList *session_list = NULL;
  44
  45 static gint imap_cmd_count = 0;
  46
  47 static GSList *imap_get_uncached_messages(IMAPSession   *session,
  48                                           FolderItem    *item,
  49                                           gint          first,
  50                                           gint          last);
  51 static GSList *imap_delete_messages      (GSList        *mlist,
  52                                           gint          first,
  53                                           gint          last);
  54 static void imap_delete_all_messages     (FolderItem    *item);
  55
  56 static SockInfo *imap_open      (const gchar    *server,
  57                                  gushort         port,
  58                                  gchar          *buf);
  59 static gint imap_auth           (SockInfo       *sock,
  60                                  const gchar    *user,
  61                                  const gchar    *pass);
  62 static gint imap_logout         (SockInfo       *sock);
  63 static gint imap_noop           (SockInfo       *sock);
  64 static gint imap_select         (SockInfo       *sock,
  65                                  const gchar    *folder,
  66                                  gint           *exists,
  67                                  gint           *recent,
  68                                  gint           *unseen,
  69                                  gulong         *uid);
  70 static gint imap_get_envelope   (SockInfo       *sock,
  71                                  gint            first,
  72                                  gint            last);
  73 #if 0
  74 static gint imap_search         (SockInfo       *sock,
  75                                  GSList         *numlist);
  76 #endif
  77 static gint imap_get_message    (SockInfo       *sock,
  78                                  gint            num,
  79                                  const gchar    *filename);
  80 static gint imap_copy_message   (SockInfo       *sock,
  81                                  gint            num,
  82                                  const gchar    *destfolder);
  83 static gint imap_store          (SockInfo       *sock,
  84                                  gint            first,
  85                                  gint            last,
  86                                  gchar          *sub_cmd);
  87
  88 static gint imap_set_article_flags      (IMAPSession    *session,
  89                                          gint            first,
  90                                          gint            last,
  91                                          IMAPFlags       flag,
  92                                          gboolean        is_set);
  93 static gint imap_expunge                (IMAPSession    *session);
  94
  95 static gchar *imap_parse_atom           (SockInfo *sock,
  96                                          gchar    *src,
  97                                          gchar    *dest,
  98                                          gchar    *orig_buf);
  99 static gchar *imap_parse_one_address    (SockInfo *sock,
 100                                          gchar    *start,
 101                                          gchar    *out_from_str,
 102                                          gchar    *out_fromname_str,
 103                                          gchar    *orig_buf);
 104 static gchar *imap_parse_address        (SockInfo *sock,
 105                                          gchar    *start,
 106                                          gchar   **out_from_str,
 107                                          gchar   **out_fromname_str,
 108                                          gchar    *orig_buf);
 109 static MsgFlags imap_parse_flags        (const gchar    *flag_str);
 110 static MsgInfo *imap_parse_envelope     (SockInfo *sock,
 111                                          gchar    *line_str);
 112
 113 static gint imap_ok             (SockInfo       *sock,
 114                                  GPtrArray      *argbuf);
 115 static void imap_gen_send       (SockInfo       *sock,
 116                                  const gchar    *format, ...);
 117 static gint imap_gen_recv       (SockInfo       *sock,
 118                                  gchar          *buf,
 119                                  gint            size);
 120
 121 static gchar *search_array_contain_str  (GPtrArray      *array,
 122                                          gchar          *str);
 123 static void imap_path_subst_slash_to_dot(gchar *str);
 124
 125
 126 static IMAPSession *imap_session_connect_if_not(Folder *folder)
 127 {
 128         RemoteFolder *rfolder = REMOTE_FOLDER(folder);
 129
 130         g_return_val_if_fail(folder != NULL, NULL);
 131         g_return_val_if_fail(folder->type == F_IMAP, NULL);
 132         g_return_val_if_fail(folder->account != NULL, NULL);
 133
 134         if (!rfolder->session) {
 135                 rfolder->session =
 136                         imap_session_new(folder->account->recv_server, 143,
 137                                          folder->account->userid,
 138                                          folder->account->passwd);
 139         } else {
 140                 if (imap_noop(rfolder->session->sock) != IMAP_SUCCESS) {
 141                         log_warning(_("IMAP4 connection to %s:%d has been"
 142                                       " disconnected. Reconnecting...\n"),
 143                                     folder->account->recv_server, 143);
 144                         session_destroy(rfolder->session);
 145                         rfolder->session =
 146                                 imap_session_new(folder->account->recv_server,
 147                                                  143, folder->account->userid,
 148                                                  folder->account->passwd);
 149                 }
 150         }
 151
 152         return IMAP_SESSION(rfolder->session);
 153 }
 154
 155 Session *imap_session_new(const gchar *server, gushort port,
 156                           const gchar *user, const gchar *pass)
 157 {
 158         gchar buf[IMAPBUFSIZE];
 159         IMAPSession *session;
 160         SockInfo *imap_sock;
 161
 162         g_return_val_if_fail(server != NULL, NULL);
 163
 164         log_message(_("creating IMAP4 connection to %s:%d ...\n"),
 165                     server, port);
 166
 167         if ((imap_sock = imap_open(server, port, buf)) == NULL)
 168                 return NULL;
 169         if (imap_auth(imap_sock, user, pass) != IMAP_SUCCESS) {
 170                 imap_logout(imap_sock);
 171                 sock_close(imap_sock);
 172                 return NULL;
 173         }
 174
 175         session = g_new(IMAPSession, 1);
 176         SESSION(session)->type      = SESSION_IMAP;
 177         SESSION(session)->server    = g_strdup(server);
 178         SESSION(session)->sock      = imap_sock;
 179         SESSION(session)->connected = TRUE;
 180         SESSION(session)->phase     = SESSION_READY;
 181         SESSION(session)->data      = NULL;
 182         session->mbox = NULL;
 183
 184         session_list = g_list_append(session_list, session);
 185
 186         return SESSION(session);
 187 }
 188
 189 void imap_session_destroy(IMAPSession *session)
 190 {
 191         sock_close(SESSION(session)->sock);
 192         SESSION(session)->sock = NULL;
 193
 194         g_free(session->mbox);
 195
 196         session_list = g_list_remove(session_list, session);
 197 }
 198
 199 void imap_session_destroy_all(void)
 200 {
 201         while (session_list != NULL) {
 202                 IMAPSession *session = (IMAPSession *)session_list->data;
 203
 204                 imap_logout(SESSION(session)->sock);
 205                 imap_session_destroy(session);
 206         }
 207 }
 208
 209 GSList *imap_get_msg_list(Folder *folder, FolderItem *item, gboolean use_cache)
 210 {
 211         GSList *mlist = NULL;
 212         IMAPSession *session;
 213
 214         g_return_val_if_fail(folder != NULL, NULL);
 215         g_return_val_if_fail(item != NULL, NULL);
 216         g_return_val_if_fail(folder->type == F_IMAP, NULL);
 217         g_return_val_if_fail(folder->account != NULL, NULL);
 218
 219         session = imap_session_connect_if_not(folder);
 220
 221         if (!session) {
 222                 mlist = procmsg_read_cache(item, FALSE);
 223                 item->last_num = procmsg_get_last_num_in_cache(mlist);
 224                 procmsg_set_flags(mlist, item);
 225         } else {
 226                 gint ok, exists = 0, recent = 0, unseen = 0, begin = 1;
 227                 gulong uid = 0, last_uid = item->mtime;
 228
 229                 ok = imap_select(SESSION(session)->sock, item->path,
 230                                         &exists, &recent, &unseen, &uid);
 231                 if (ok != IMAP_SUCCESS) {
 232                         log_warning(_("can't select folder: %s\n"), item->path);
 233                         return NULL;
 234                 }
 235
 236                 if (use_cache) {
 237                         gint cache_last;
 238
 239                         mlist = procmsg_read_cache(item, FALSE);
 240                         procmsg_set_flags(mlist, item);
 241                         cache_last = procmsg_get_last_num_in_cache(mlist);
 242
 243                         /* calculating the range of envelope to get */
 244                         if (exists < cache_last) {
 245                                 /* some messages are deleted (get all) */
 246                                 begin = 1;
 247                         } else if (exists == cache_last) {
 248                                 if (last_uid != 0 && last_uid != uid) {
 249                                         /* some recent but deleted (get all) */
 250                                         begin = 1;
 251                                 } else {
 252                                         /* mailbox unchanged (get none)*/
 253                                         begin = -1;
 254                                 }
 255                         } else {
 256                                 if (exists == cache_last + recent) {
 257                                         /* some recent */
 258                                         begin = cache_last + 1;
 259                                 } else {
 260                                         /* some recent but deleted (get all) */
 261                                         begin = 1;
 262                                 }
 263                         }
 264
 265                         item->mtime = uid;
 266                 }
 267
 268                 if (1 < begin && begin <= exists) {
 269                         GSList *newlist;
 270
 271                         newlist = imap_get_uncached_messages
 272                                 (session, item, begin, exists);
 273                         imap_delete_messages(mlist, begin, INT_MAX);
 274                         mlist = g_slist_concat(mlist, newlist);
 275                 } else if (begin == 1) {
 276                         mlist = imap_get_uncached_messages
 277                                         (session, item, 1, exists);
 278                         imap_delete_all_messages(item);
 279                 }
 280
 281                 item->last_num = exists;
 282         }
 283
 284         statusbar_pop_all();
 285
 286         return mlist;
 287 }
 288
 289 gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint num)
 290 {
 291         gchar *path, *filename;
 292         IMAPSession *session;
 293         gint ok;
 294
 295         g_return_val_if_fail(folder != NULL, NULL);
 296         g_return_val_if_fail(item != NULL, NULL);
 297
 298         session = imap_session_connect_if_not(folder);
 299
 300         path = folder_item_get_path(item);
 301         filename = g_strconcat(path, G_DIR_SEPARATOR_S, itos(num), NULL);
 302         g_free(path);
 303
 304         if (is_file_exist(filename)) {
 305                 debug_print(_("message %d has been already cached.\n"), num);
 306                 return filename;
 307         }
 308
 309         if (!session) {
 310                 g_free(filename);
 311                 return NULL;
 312         }
 313
 314         debug_print(_("getting message %d...\n"), num);
 315         ok = imap_get_message(SESSION(session)->sock, num, filename);
 316
 317         statusbar_pop_all();
 318
 319         if (ok != IMAP_SUCCESS) {
 320                 g_warning(_("can't fetch message %d\n"), num);
 321                 g_free(filename);
 322                 return NULL;
 323         }
 324
 325         return filename;
 326 }
 327
 328 gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 329 {
 330         gchar *destdir;
 331         IMAPSession *session;
 332
 333         g_return_val_if_fail(folder != NULL, -1);
 334         g_return_val_if_fail(dest != NULL, -1);
 335         g_return_val_if_fail(msginfo != NULL, -1);
 336
 337         session = imap_session_connect_if_not(folder);
 338         if (!session) return -1;
 339
 340         if (msginfo->folder == dest) {
 341                 g_warning(_("the src folder is identical to the dest.\n"));
 342                 return -1;
 343         }
 344
 345         Xstrdup_a(destdir, dest->path, return -1);
 346         /* imap_path_subst_slash_to_dot(destdir); */
 347
 348         imap_copy_message(SESSION(session)->sock, msginfo->msgnum, destdir);
 349         imap_set_article_flags(session, msginfo->msgnum, msginfo->msgnum,
 350                                IMAP_FLAG_DELETED, TRUE);
 351         debug_print(_("Moving message %s%c%d to %s ...\n"),
 352                     msginfo->folder->path, G_DIR_SEPARATOR,
 353                     msginfo->msgnum, dest->path);
 354
 355         imap_expunge(session);
 356
 357         return IMAP_SUCCESS;
 358 }
 359
 360 gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest,
 361                               GSList *msglist)
 362 {
 363         gchar *destdir;
 364         GSList *cur;
 365         MsgInfo *msginfo;
 366         IMAPSession *session;
 367
 368         g_return_val_if_fail(folder != NULL, -1);
 369         g_return_val_if_fail(dest != NULL, -1);
 370         g_return_val_if_fail(msglist != NULL, -1);
 371
 372         session = imap_session_connect_if_not(folder);
 373         if (!session) return -1;
 374
 375         Xstrdup_a(destdir, dest->path, return -1);
 376         /* imap_path_subst_slash_to_dot(destdir); */
 377
 378         for (cur = msglist; cur != NULL; cur = cur->next) {
 379                 msginfo = (MsgInfo *)cur->data;
 380
 381                 if (msginfo->folder == dest) {
 382                         g_warning(_("the src folder is identical to the dest.\n"));
 383                         continue;
 384                 }
 385                 imap_copy_message(SESSION(session)->sock,
 386                                   msginfo->msgnum, destdir);
 387                 imap_set_article_flags
 388                         (session, msginfo->msgnum, msginfo->msgnum,
 389                          IMAP_FLAG_DELETED, TRUE);
 390
 391                 debug_print(_("Moving message %s%c%d to %s ...\n"),
 392                             msginfo->folder->path, G_DIR_SEPARATOR,
 393                             msginfo->msgnum, dest->path);
 394
 395         }
 396
 397         imap_expunge(session);
 398
 399         return IMAP_SUCCESS;
 400
 401 }
 402
 403 gint imap_remove_msg(Folder *folder, FolderItem *item, gint num)
 404 {
 405         gint exists, recent, unseen;
 406         gulong uid;
 407         gint ok;
 408         IMAPSession *session;
 409
 410         g_return_val_if_fail(folder != NULL, -1);
 411         g_return_val_if_fail(item != NULL, -1);
 412         g_return_val_if_fail(num > 0 && num <= item->last_num, -1);
 413
 414         session = imap_session_connect_if_not(folder);
 415         if (!session) return -1;
 416
 417         ok = imap_select(SESSION(session)->sock, item->path,
 418                          &exists, &recent, &unseen, &uid);
 419         if (ok != IMAP_SUCCESS) {
 420                 log_warning(_("can't select folder: %s\n"), item->path);
 421                 return ok;
 422         }
 423
 424         ok = imap_set_article_flags(IMAP_SESSION(REMOTE_FOLDER(folder)->session),
 425                                     num, num, IMAP_FLAG_DELETED, TRUE);
 426         if (ok != IMAP_SUCCESS) {
 427                 log_warning(_("can't set deleted flags: %d\n"), num);
 428                 return ok;
 429         }
 430
 431         ok = imap_expunge(session);
 432         if (ok != IMAP_SUCCESS) {
 433                 log_warning(_("can't expunge\n"));
 434                 return ok;
 435         }
 436
 437         return IMAP_SUCCESS;
 438 }
 439
 440 gint imap_remove_all_msg(Folder *folder, FolderItem *item)
 441 {
 442         gint exists, recent, unseen;
 443         gulong uid;
 444         gint ok;
 445         IMAPSession *session;
 446
 447         g_return_val_if_fail(folder != NULL, -1);
 448         g_return_val_if_fail(item != NULL, -1);
 449
 450         session = imap_session_connect_if_not(folder);
 451         if (!session) return -1;
 452
 453         ok = imap_select(SESSION(session)->sock, item->path,
 454                          &exists, &recent, &unseen, &uid);
 455         if (ok != IMAP_SUCCESS) {
 456                 log_warning(_("can't select folder: %s\n"), item->path);
 457                 return ok;
 458         }
 459
 460         ok = imap_set_article_flags(session, 1, exists,
 461                                     IMAP_FLAG_DELETED, TRUE);
 462         if (ok != IMAP_SUCCESS) {
 463                 log_warning(_("can't set deleted flags: 1:%d\n"), exists);
 464                 return ok;
 465         }
 466
 467         ok = imap_expunge(session);
 468         if (ok != IMAP_SUCCESS) {
 469                 log_warning(_("can't expunge\n"));
 470                 return ok;
 471         }
 472
 473         return IMAP_SUCCESS;
 474 }
 475
 476 void imap_scan_folder(Folder *folder, FolderItem *item)
 477 {
 478 }
 479
 480 FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
 481                                const gchar *name)
 482 {
 483         gchar *path;
 484         FolderItem *new_item;
 485
 486         g_return_val_if_fail(folder != NULL, NULL);
 487         g_return_val_if_fail(parent != NULL, NULL);
 488         g_return_val_if_fail(name != NULL, NULL);
 489
 490         imap_session_connect_if_not(folder);
 491
 492         if (parent->path)
 493                 path = g_strconcat(parent->path, G_DIR_SEPARATOR_S, name,
 494                                    NULL);
 495         else
 496                 path = g_strdup(name);
 497
 498         new_item = folder_item_new(name, path);
 499         folder_item_append(parent, new_item);
 500         g_free(path);
 501
 502         return new_item;
 503 }
 504
 505 static GSList *imap_get_uncached_messages(IMAPSession *session,
 506                                           FolderItem *item,
 507                                           gint first, gint last)
 508 {
 509         gchar buf[IMAPBUFSIZE];
 510         GSList *newlist = NULL;
 511         GSList *llast = NULL;
 512         MsgInfo *msginfo;
 513
 514         g_return_val_if_fail(session != NULL, NULL);
 515         g_return_val_if_fail(item != NULL, NULL);
 516         g_return_val_if_fail(item->folder != NULL, NULL);
 517         g_return_val_if_fail(item->folder->type == F_IMAP, NULL);
 518         g_return_val_if_fail(first <= last, NULL);
 519
 520         if (imap_get_envelope(SESSION(session)->sock, first, last)
 521             != IMAP_SUCCESS) {
 522                 log_warning(_("can't get envelope\n"));
 523                 return NULL;
 524         }
 525
 526         for (;;) {
 527                 if (sock_gets(SESSION(session)->sock, buf, sizeof(buf)) < 0) {
 528                         log_warning(_("error occurred while getting envelope.\n"));
 529                         return newlist;
 530                 }
 531                 strretchomp(buf);
 532                 if (buf[0] != '*' || buf[1] != ' ') break;
 533
 534                 msginfo = imap_parse_envelope(SESSION(session)->sock, buf);
 535                 if (!msginfo) {
 536                         log_warning(_("can't parse envelope: %s\n"), buf);
 537                         continue;
 538                 }
 539
 540                 msginfo->folder = item;
 541
 542                 if (!newlist)
 543                         llast = newlist = g_slist_append(newlist, msginfo);
 544                 else {
 545                         llast = g_slist_append(llast, msginfo);
 546                         llast = llast->next;
 547                 }
 548         }
 549
 550         return newlist;
 551 }
 552
 553 static GSList *imap_delete_messages(GSList *mlist, gint first, gint last)
 554 {
 555         GSList *cur, *next;
 556         MsgInfo *msginfo;
 557         gchar *cache_file;
 558
 559         for (cur = mlist; cur != NULL; ) {
 560                 next = cur->next;
 561
 562                 msginfo = (MsgInfo *)cur->data;
 563                 if ((msginfo) &&
 564                     (first <= msginfo->msgnum ) &&
 565                     (msginfo->msgnum <= last)) {
 566                         debug_print(_("deleting message %d...\n"),
 567                                     msginfo->msgnum);
 568
 569                         cache_file = procmsg_get_message_file_path(msginfo);
 570                         if (is_file_exist(cache_file)) unlink(cache_file);
 571                         g_free(cache_file);
 572
 573                         procmsg_msginfo_free(msginfo);
 574                         mlist = g_slist_remove(mlist, msginfo);
 575                 }
 576
 577                 cur = next;
 578         }
 579
 580         return mlist;
 581 }
 582
 583 static void imap_delete_all_messages(FolderItem *item)
 584 {
 585         DIR *dp;
 586         struct dirent *d;
 587         gchar *dir;
 588         gchar *file;
 589
 590         g_return_if_fail(item != NULL);
 591         g_return_if_fail(item->folder != NULL);
 592         g_return_if_fail(item->folder->type == F_IMAP);
 593
 594         dir = folder_item_get_path(item);
 595         if ((dp = opendir(dir)) == NULL) {
 596                 FILE_OP_ERROR(dir, "opendir");
 597                 g_free(dir);
 598                 return;
 599         }
 600
 601         debug_print(_("\tDeleting all cached messages... "));
 602
 603         while ((d = readdir(dp)) != NULL) {
 604                 if (to_number(d->d_name) < 0) continue;
 605
 606                 file = g_strconcat(dir, G_DIR_SEPARATOR_S, d->d_name, NULL);
 607
 608                 if (is_file_exist(file)) {
 609                         if (unlink(file) < 0)
 610                                 FILE_OP_ERROR(file, "unlink");
 611                 }
 612
 613                 g_free(file);
 614         }
 615
 616         closedir(dp);
 617         g_free(dir);
 618
 619         debug_print(_("done.\n"));
 620 }
 621
 622
 623 static SockInfo *imap_open(const gchar *server, gushort port, gchar *buf)
 624 {
 625         SockInfo *sock;
 626
 627         if ((sock = sock_connect(server, port)) == NULL) {
 628                 log_warning(_("Can't connect to IMAP4 server: %s:%d\n"),
 629                             server, port);
 630                 return NULL;
 631         }
 632
 633         imap_cmd_count = 0;
 634
 635         if (imap_noop(sock) != IMAP_SUCCESS) {
 636                 sock_close(sock);
 637                 return NULL;
 638         }
 639
 640         return sock;
 641 }
 642
 643 static gint imap_auth(SockInfo *sock, const gchar *user, const gchar *pass)
 644 {
 645         gint ok;
 646         GPtrArray *argbuf;
 647
 648         imap_gen_send(sock, "LOGIN \"%s\" %s", user, pass);
 649         argbuf = g_ptr_array_new();
 650         ok = imap_ok(sock, argbuf);
 651         if (ok != IMAP_SUCCESS) log_warning(_("IMAP4 login failed.\n"));
 652         ptr_array_free_strings(argbuf);
 653         g_ptr_array_free(argbuf, TRUE);
 654
 655         return ok;
 656 }
 657
 658 static gint imap_logout(SockInfo *sock)
 659 {
 660         imap_gen_send(sock, "LOGOUT");
 661         return imap_ok(sock, NULL);
 662 }
 663
 664 static gint imap_noop(SockInfo *sock)
 665 {
 666         imap_gen_send(sock, "NOOP");
 667         return imap_ok(sock, NULL);
 668 }
 669
 670 static gint imap_select(SockInfo *sock, const gchar *folder,
 671                         gint *exists, gint *recent, gint *unseen, gulong *uid)
 672 {
 673         gint ok;
 674         gchar *resp_str;
 675         GPtrArray *argbuf;
 676         gchar *imappath;
 677
 678         *exists = *recent = *unseen = *uid = 0;
 679         argbuf = g_ptr_array_new();
 680
 681         Xstrdup_a(imappath, folder, return -1);
 682         /* imap_path_subst_slash_to_dot(imappath); */
 683
 684         imap_gen_send(sock, "SELECT \"%s\"", imappath);
 685         if ((ok = imap_ok(sock, argbuf)) != IMAP_SUCCESS)
 686                 goto bail;
 687
 688         resp_str = search_array_contain_str(argbuf, "EXISTS");
 689         if (resp_str) {
 690                 if (sscanf(resp_str,"%d EXISTS", exists) != 1) {
 691                         g_warning("imap_select(): invalid EXISTS line.\n");
 692                         goto bail;
 693                 }
 694         }
 695
 696         resp_str = search_array_contain_str(argbuf, "RECENT");
 697         if (resp_str) {
 698                 if (sscanf(resp_str, "%d RECENT", recent) != 1) {
 699                         g_warning("imap_select(): invalid RECENT line.\n");
 700                         goto bail;
 701                 }
 702         }
 703
 704         resp_str = search_array_contain_str(argbuf, "UIDVALIDITY");
 705         if (resp_str) {
 706                 if (sscanf(resp_str, "OK [UIDVALIDITY %lu] ", uid) != 1) {
 707                         g_warning("imap_select(): invalid UIDVALIDITY line.\n");
 708                         goto bail;
 709                 }
 710         }
 711
 712         resp_str = search_array_contain_str(argbuf, "UNSEEN");
 713         if (resp_str) {
 714                 if (sscanf(resp_str, "OK [UNSEEN %d] ", unseen) != 1) {
 715                         g_warning("imap_select(): invalid UNSEEN line.\n");
 716                         goto bail;
 717                 }
 718         }
 719
 720 bail:
 721         ptr_array_free_strings(argbuf);
 722         g_ptr_array_free(argbuf, TRUE);
 723
 724         return ok;
 725 }
 726
 727 static gchar *strchr_cpy(const gchar *src, gchar ch, gchar *dest, gint len)
 728 {
 729         gchar *tmp;
 730
 731         dest[0] = '\0';
 732         tmp = strchr(src, ch);
 733         if (!tmp || tmp == src)
 734                 return NULL;
 735
 736         memcpy(dest, src, MIN(tmp - src, len - 1));
 737         dest[MIN(tmp - src, len - 1)] = '\0';
 738
 739         return tmp + 1;
 740 }
 741
 742 static gint imap_get_message(SockInfo *sock, gint num, const gchar *filename)
 743 {
 744         gint ok;
 745         gchar buf[IMAPBUFSIZE];
 746         gchar *cur_pos;
 747         gchar size_str[32];
 748         glong size_num;
 749
 750         g_return_val_if_fail(filename != NULL, IMAP_ERROR);
 751
 752         imap_gen_send(sock, "FETCH %d BODY[]", num);
 753
 754         if (sock_gets(sock, buf, sizeof(buf)) < 0)
 755                 return IMAP_ERROR;
 756         strretchomp(buf);
 757         if (buf[0] != '*' || buf[1] != ' ')
 758                 return IMAP_ERROR;
 759         log_print("IMAP4< %s\n", buf);
 760
 761         cur_pos = strchr(buf, '{');
 762         g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
 763         cur_pos = strchr_cpy(cur_pos + 1, '}', size_str, sizeof(size_str));
 764         g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
 765         size_num = atol(size_str);
 766
 767         if (*cur_pos != '\0') return IMAP_ERROR;
 768
 769         if (recv_bytes_write_to_file(sock, size_num, filename) != 0)
 770                 return IMAP_ERROR;
 771
 772         if (imap_gen_recv(sock, buf, sizeof(buf)) != IMAP_SUCCESS)
 773                 return IMAP_ERROR;
 774
 775         if (buf[0] != ')')
 776                 return IMAP_ERROR;
 777
 778         ok = imap_ok(sock, NULL);
 779
 780         return ok;
 781 }
 782
 783 static gint imap_copy_message(SockInfo *sock, gint num, const gchar *destfolder)
 784 {
 785         gint ok;
 786
 787         g_return_val_if_fail(destfolder != NULL, IMAP_ERROR);
 788
 789         imap_gen_send(sock, "COPY %d %s", num, destfolder);
 790         ok = imap_ok(sock, NULL);
 791         if (ok != IMAP_SUCCESS) {
 792                 log_warning(_("can't copy %d to %s\n"), num, destfolder);
 793                 return -1;
 794         }
 795
 796         return ok;
 797 }
 798
 799 static gchar *imap_parse_atom(SockInfo *sock, gchar *src, gchar *dest,
 800                               gchar *orig_buf)
 801 {
 802         gchar *cur_pos = src;
 803
 804         while (*cur_pos == ' ') cur_pos++;
 805
 806         if (!strncmp(cur_pos, "NIL", 3)) {
 807                 *dest = '\0';
 808                 cur_pos += 3;
 809         } else if (*cur_pos == '\"') {
 810                 gchar *p;
 811
 812                 p = strchr_cpy(cur_pos + 1, '\"', dest, IMAPBUFSIZE);
 813                 cur_pos = p ? p : cur_pos + 2;
 814         } else if (*cur_pos == '{') {
 815                 gchar buf[32];
 816                 gint len;
 817
 818                 cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
 819                 len = atoi(buf);
 820
 821                 g_return_val_if_fail(orig_buf != NULL, cur_pos);
 822
 823                 if (sock_gets(sock, orig_buf, IMAPBUFSIZE) < 0)
 824                         return cur_pos;
 825                 strretchomp(orig_buf);
 826                 log_print("IMAP4< %s\n", orig_buf);
 827                 memcpy(dest, orig_buf, len);
 828                 dest[len] = '\0';
 829                 cur_pos = orig_buf + len;
 830         }
 831
 832         return cur_pos;
 833 }
 834
 835 static gchar *imap_parse_one_address(SockInfo *sock, gchar *start,
 836                                      gchar *out_from_str,
 837                                      gchar *out_fromname_str,
 838                                      gchar *orig_buf)
 839 {
 840         gchar buf[IMAPBUFSIZE];
 841         gchar *cur_pos = start;
 842
 843         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 844         conv_unmime_header(out_fromname_str, 256, buf, NULL);
 845
 846         if (out_fromname_str[0] != '\0') {
 847                 strcat(out_from_str, "\"");
 848                 strcat(out_from_str, out_fromname_str);
 849                 strcat(out_from_str, "\"");
 850         }
 851
 852         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 853
 854         strcat(out_from_str, " <");
 855
 856         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 857         strcat(out_from_str, buf);
 858
 859         cur_pos = imap_parse_atom(sock, cur_pos, buf, orig_buf);
 860         strcat(out_from_str, "@");
 861         strcat(out_from_str, buf);
 862         strcat(out_from_str, ">");
 863
 864         while (*cur_pos == ' ') cur_pos++;
 865
 866         g_return_val_if_fail(*cur_pos == ')', cur_pos + 1);
 867
 868         return cur_pos + 1;
 869 }
 870
 871 static gchar *imap_parse_address(SockInfo *sock, gchar *start,
 872                                  gchar **out_from_str,
 873                                  gchar **out_fromname_str,
 874                                  gchar *orig_buf)
 875 {
 876         gchar buf[IMAPBUFSIZE];
 877         gchar name_buf[IMAPBUFSIZE];
 878         gchar *cur_pos = start;
 879         gboolean first = TRUE;
 880
 881         if (out_from_str)     *out_from_str     = NULL;
 882         if (out_fromname_str) *out_fromname_str = NULL;
 883         buf[0] = name_buf[0] = '\0';
 884
 885         if (!strncmp(cur_pos, "NIL", 3)) {
 886                 if (out_from_str)     *out_from_str     = g_strdup("");
 887                 if (out_fromname_str) *out_fromname_str = g_strdup("");
 888                 return cur_pos + 3;
 889         }
 890
 891         g_return_val_if_fail(*cur_pos == '(', NULL);
 892         cur_pos++;
 893
 894         for (;;) {
 895                 gchar ch = *cur_pos++;
 896                 if (ch == ')') break;
 897                 if (ch == '(') {
 898                         if (!first) strcat(buf, ", ");
 899                         first = FALSE;
 900                         cur_pos = imap_parse_one_address
 901                                 (sock, cur_pos, buf, name_buf, orig_buf);
 902                         if (!cur_pos) return NULL;
 903                 }
 904         }
 905
 906         if (out_from_str)     *out_from_str     = g_strdup(buf);
 907         if (out_fromname_str) *out_fromname_str = g_strdup(name_buf);
 908
 909         return cur_pos;
 910 }
 911
 912 static MsgFlags imap_parse_flags(const gchar *flag_str)
 913 {
 914         gchar buf[32];
 915         const gchar *cur_pos = flag_str;
 916         const gchar *last_pos;
 917         MsgFlags flags;
 918
 919         flags = 0;
 920         MSG_SET_FLAGS(flags, MSG_UNREAD|MSG_IMAP);
 921
 922         while (cur_pos != NULL) {
 923                 cur_pos = strchr(cur_pos, '\\');
 924                 if (cur_pos == NULL) break;
 925
 926                 last_pos = cur_pos + 1;
 927                 cur_pos = strchr_cpy(last_pos, ' ', buf, sizeof(buf));
 928                 if (cur_pos == NULL)
 929                         strncpy2(buf, last_pos, sizeof(buf));
 930
 931                 if (g_strcasecmp(buf, "Recent") == 0) {
 932                         MSG_SET_FLAGS(flags, MSG_NEW|MSG_UNREAD);
 933                 } else if (g_strcasecmp(buf, "Seen") == 0) {
 934                         MSG_UNSET_FLAGS(flags, MSG_NEW|MSG_UNREAD);
 935                 } else if (g_strcasecmp(buf, "Deleted") == 0) {
 936                         MSG_SET_FLAGS(flags, MSG_DELETED);
 937                 } else if (g_strcasecmp(buf, "Flagged") == 0) {
 938                         MSG_SET_FLAGS(flags, MSG_MARKED);
 939                 }
 940         }
 941
 942         return flags;
 943 }
 944
 945 static MsgInfo *imap_parse_envelope(SockInfo *sock, gchar *line_str)
 946 {
 947         MsgInfo *msginfo;
 948         gchar buf[IMAPBUFSIZE];
 949         gchar tmp[IMAPBUFSIZE];
 950         gchar *cur_pos;
 951         gint msgnum;
 952         size_t size;
 953         gchar *date = NULL;
 954         time_t date_t;
 955         gchar *subject = NULL;
 956         gchar *tmp_from;
 957         gchar *tmp_fromname;
 958         gchar *from = NULL;
 959         gchar *fromname = NULL;
 960         gchar *tmp_to;
 961         gchar *to = NULL;
 962         gchar *inreplyto = NULL;
 963         gchar *msgid = NULL;
 964         MsgFlags flags;
 965
 966         log_print("IMAP4< %s\n", line_str);
 967
 968         g_return_val_if_fail(line_str != NULL, NULL);
 969         g_return_val_if_fail(line_str[0] == '*' && line_str[1] == ' ', NULL);
 970
 971         cur_pos = line_str + 2;
 972
 973 #define PARSE_ONE_ELEMENT(ch) \
 974 { \
 975         cur_pos = strchr_cpy(cur_pos, ch, buf, sizeof(buf)); \
 976         g_return_val_if_fail(cur_pos != NULL, NULL); \
 977 }
 978
 979         PARSE_ONE_ELEMENT(' ');
 980         msgnum = atoi(buf);
 981
 982         PARSE_ONE_ELEMENT(' ');
 983         g_return_val_if_fail(!strcmp(buf, "FETCH"), NULL);
 984
 985         PARSE_ONE_ELEMENT(' ');
 986         g_return_val_if_fail(!strcmp(buf, "(FLAGS"), NULL);
 987
 988         PARSE_ONE_ELEMENT(')');
 989         g_return_val_if_fail(*buf == '(', NULL);
 990         flags = imap_parse_flags(buf + 1);
 991
 992         g_return_val_if_fail(*cur_pos == ' ', NULL);
 993         g_return_val_if_fail
 994                 ((cur_pos = strchr_cpy(cur_pos + 1, ' ', buf, sizeof(buf))),
 995                  NULL);
 996         g_return_val_if_fail(!strcmp(buf, "RFC822.SIZE"), NULL);
 997
 998         PARSE_ONE_ELEMENT(' ');
 999         size = atoi(buf);
1000
1001         PARSE_ONE_ELEMENT(' ');
1002         g_return_val_if_fail(!strcmp(buf, "ENVELOPE"), NULL);
1003
1004         g_return_val_if_fail(*cur_pos == '(', NULL);
1005         cur_pos = imap_parse_atom(sock, cur_pos + 1, buf, line_str);
1006         Xstrdup_a(date, buf, return NULL);
1007         date_t = procheader_date_parse(NULL, date, 0);
1008
1009         cur_pos = imap_parse_atom(sock, cur_pos, buf, line_str);
1010         if (buf[0] != '\0') {
1011                 conv_unmime_header(tmp, sizeof(tmp), buf, NULL);
1012                 Xstrdup_a(subject, tmp, return NULL);
1013         }
1014
1015         g_return_val_if_fail(*cur_pos == ' ', NULL);
1016         cur_pos = imap_parse_address(sock, cur_pos + 1,
1017                                      &tmp_from, &tmp_fromname, line_str);
1018         Xstrdup_a(from, tmp_from,
1019                   {g_free(tmp_from); g_free(tmp_fromname); return NULL;});
1020         Xstrdup_a(fromname, tmp_fromname,
1021                   {g_free(tmp_from); g_free(tmp_fromname); return NULL;});
1022         g_free(tmp_from);
1023         g_free(tmp_fromname);
1024
1025 #define SKIP_ONE_ELEMENT() \
1026 { \
1027         g_return_val_if_fail(*cur_pos == ' ', NULL); \
1028         cur_pos = imap_parse_address(sock, cur_pos + 1, \
1029                                      NULL, NULL, line_str); \
1030 }
1031
1032         /* skip sender and reply-to */
1033         SKIP_ONE_ELEMENT();
1034         SKIP_ONE_ELEMENT();
1035
1036         g_return_val_if_fail(*cur_pos == ' ', NULL);
1037         cur_pos = imap_parse_address(sock, cur_pos + 1, &tmp_to, NULL, line_str);
1038         Xstrdup_a(to, tmp_to, {g_free(tmp_to); return NULL;});
1039         g_free(tmp_to);
1040
1041         /* skip Cc and Bcc */
1042         SKIP_ONE_ELEMENT();
1043         SKIP_ONE_ELEMENT();
1044
1045 #undef SKIP_ONE_ELEMENT
1046
1047         g_return_val_if_fail(*cur_pos == ' ', NULL);
1048         cur_pos = imap_parse_atom(sock, cur_pos, buf, line_str);
1049         if (buf[0] != '\0') {
1050                 eliminate_parenthesis(buf, '(', ')');
1051                 extract_parenthesis(buf, '<', '>');
1052                 remove_space(buf);
1053                 Xstrdup_a(inreplyto, buf, return NULL);
1054         }
1055
1056         g_return_val_if_fail(*cur_pos == ' ', NULL);
1057         cur_pos = imap_parse_atom(sock, cur_pos, buf, line_str);
1058         if (buf[0] != '\0') {
1059                 extract_parenthesis(buf, '<', '>');
1060                 remove_space(buf);
1061                 Xstrdup_a(msgid, buf, return NULL);
1062         }
1063
1064         msginfo = g_new0(MsgInfo, 1);
1065         msginfo->msgnum = msgnum;
1066         msginfo->size = size;
1067         msginfo->date = g_strdup(date);
1068         msginfo->date_t = date_t;
1069         msginfo->subject = g_strdup(subject);
1070         msginfo->from = g_strdup(from);
1071         msginfo->fromname = g_strdup(fromname);
1072         msginfo->to = g_strdup(to);
1073         msginfo->inreplyto = g_strdup(inreplyto);
1074         msginfo->msgid = g_strdup(msgid);
1075         msginfo->flags = flags;
1076
1077         return msginfo;
1078 }
1079
1080 gint imap_get_envelope(SockInfo *sock, gint first, gint last)
1081 {
1082         imap_gen_send(sock, "FETCH %d:%d (FLAGS RFC822.SIZE ENVELOPE)",
1083                       first, last);
1084
1085         return IMAP_SUCCESS;
1086 }
1087
1088 static gint imap_store(SockInfo *sock, gint first, gint last, gchar *sub_cmd)
1089 {
1090         gint ok;
1091         GPtrArray *argbuf;
1092
1093         argbuf = g_ptr_array_new();
1094
1095         imap_gen_send(sock, "STORE %d:%d %s", first, last, sub_cmd);
1096
1097         if ((ok = imap_ok(sock, argbuf)) != IMAP_SUCCESS) {
1098                 g_ptr_array_free(argbuf, TRUE);
1099                 log_warning(_("error while imap command: STORE %d:%d %s\n"),
1100                             first, last, sub_cmd);
1101                 return ok;
1102         }
1103
1104         g_ptr_array_free(argbuf, TRUE);
1105
1106         return IMAP_SUCCESS;
1107 }
1108
1109 static gint imap_set_article_flags(IMAPSession *session,
1110                                    gint first,
1111                                    gint last,
1112                                    IMAPFlags flags,
1113                                    gboolean is_set)
1114 {
1115         GString *buf;
1116         gint ok;
1117
1118         buf = g_string_new(is_set ? "+FLAGS (" : "-FLAGS (");
1119
1120         if (IMAP_IS_SEEN(flags))        g_string_append(buf, "\\Seen ");
1121         if (IMAP_IS_ANSWERED(flags))    g_string_append(buf, "\\Answered ");
1122         if (IMAP_IS_FLAGGED(flags))     g_string_append(buf, "\\Flagged ");
1123         if (IMAP_IS_DELETED(flags))     g_string_append(buf, "\\Deleted ");
1124         if (IMAP_IS_DRAFT(flags))       g_string_append(buf, "\\Draft");
1125
1126         if (buf->str[buf->len - 1] == ' ')
1127                 g_string_truncate(buf, buf->len - 1);
1128
1129         g_string_append_c(buf, ')');
1130
1131         ok = imap_store(SESSION(session)->sock, first, last, buf->str);
1132         g_string_free(buf, TRUE);
1133
1134         return ok;
1135 }
1136
1137 static gint imap_expunge(IMAPSession *session)
1138 {
1139         gint ok;
1140         GPtrArray *argbuf;
1141
1142         argbuf = g_ptr_array_new();
1143
1144         imap_gen_send(SESSION(session)->sock, "EXPUNGE");
1145
1146         if ((ok = imap_ok(SESSION(session)->sock, argbuf)) != IMAP_SUCCESS) {
1147                 log_warning(_("error while imap command: EXPUNGE\n"));
1148                 g_ptr_array_free(argbuf, TRUE);
1149                 return ok;
1150         }
1151
1152         g_ptr_array_free(argbuf, TRUE);
1153
1154         return IMAP_SUCCESS;
1155 }
1156
1157 static gint imap_ok(SockInfo *sock, GPtrArray *argbuf)
1158 {
1159         gint ok;
1160         gchar buf[IMAPBUFSIZE];
1161         gint cmd_num;
1162         gchar cmd_status[IMAPBUFSIZE];
1163
1164         while ((ok = imap_gen_recv(sock, buf, sizeof(buf))) == IMAP_SUCCESS) {
1165                 if (buf[0] == '*' && buf[1] == ' ') {
1166                         if (argbuf)
1167                                 g_ptr_array_add(argbuf, g_strdup(&buf[2]));
1168                 } else {
1169                         if (sscanf(buf, "%d %s", &cmd_num, cmd_status) < 2)
1170                                 return IMAP_ERROR;
1171                         else if (cmd_num == imap_cmd_count &&
1172                                  !strcmp(cmd_status, "OK")) {
1173                                 if (argbuf)
1174                                         g_ptr_array_add(argbuf, g_strdup(buf));
1175                                 return IMAP_SUCCESS;
1176                         } else
1177                                 return IMAP_ERROR;
1178                 }
1179         }
1180
1181         return ok;
1182 }
1183
1184 static gchar *search_array_contain_str(GPtrArray *array, gchar *str)
1185 {
1186         gint i;
1187
1188         for (i = 0; i < array->len; i++) {
1189                 gchar *tmp;
1190
1191                 tmp = g_ptr_array_index(array, i);
1192                 if (strstr(tmp, str) != NULL)
1193                         return tmp;
1194         }
1195
1196         return NULL;
1197 }
1198
1199 static void imap_gen_send(SockInfo *sock, const gchar *format, ...)
1200 {
1201         gchar buf[IMAPBUFSIZE];
1202         gchar tmp[IMAPBUFSIZE];
1203         gchar *p;
1204         va_list args;
1205
1206         va_start(args, format);
1207         g_vsnprintf(tmp, sizeof(tmp), format, args);
1208         va_end(args);
1209
1210         imap_cmd_count++;
1211
1212         g_snprintf(buf, sizeof(buf), "%d %s\r\n", imap_cmd_count, tmp);
1213         if (!strncasecmp(tmp, "LOGIN ", 6) && (p = strchr(tmp + 6, ' '))) {
1214                 *(p + 1) = '\0';
1215                 log_print("IMAP4> %d %s ********\n", imap_cmd_count, tmp);
1216         } else
1217                 log_print("IMAP4> %d %s\n", imap_cmd_count, tmp);
1218
1219         sock_write(sock, buf, strlen(buf));
1220 }
1221
1222 static gint imap_gen_recv(SockInfo *sock, gchar *buf, gint size)
1223 {
1224         if (sock_gets(sock, buf, size) == -1)
1225                 return IMAP_SOCKET;
1226
1227         strretchomp(buf);
1228
1229         log_print("IMAP4< %s\n", buf);
1230
1231         return IMAP_SUCCESS;
1232 }
1233
1234 static void imap_path_subst_slash_to_dot(gchar *str)
1235 {
1236         subst_char(str, '/', '.');
1237 }