src/plugins/rssyl/parse822.c

   1 /*
   2  * Claws-Mail-- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2004 Hiroyuki Yamamoto
   4  * This file (C) 2005 Andrej Kacian <andrej@kacian.sk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include "config.h"
  23 #endif
  24
  25 /* Global includes */
  26 #include <sys/stat.h>
  27 #include <glib.h>
  28 #include <pthread.h>
  29
  30 /* Claws Mail includes */
  31 #include <common/claws.h>
  32 #include <procheader.h>
  33 #include <common/utils.h>
  34 #include <main.h>
  35
  36 /* Local includes */
  37 #include "libfeed/feed.h"
  38 #include "libfeed/feeditem.h"
  39 #include "libfeed/date.h"
  40 #include "parse822.h"
  41 #include "rssyl_feed.h"
  42 #include "rssyl_parse_feed.h"
  43 #include "strutils.h"
  44
  45 /* rssyl_parse_folder_item_file()
  46  *
  47  * Parse a RFC822-formatted feed item given by "path", and returns a
  48  * pointer to a newly-allocated FeedItem struct, which contains all required data.
  49  *
  50  */
  51 FeedItem *rssyl_parse_folder_item_file(gchar *path)
  52 {
  53         gchar *contents, **lines, **line, **splid;
  54         GError *error = NULL;
  55         FeedItem *item;
  56         RFeedCtx *ctx;
  57         gint i = 0;
  58         gboolean parsing_headers = TRUE, past_html_tag = FALSE, past_endhtml_tag = FALSE;
  59         gboolean started_author = FALSE, started_subject = FALSE;
  60         gboolean started_link = FALSE, started_clink = FALSE, got_original_title = FALSE;
  61
  62         debug_print("RSSyl: parsing '%s'\n", path);
  63
  64         g_file_get_contents(path, &contents, NULL, &error);
  65
  66         if( error )
  67                 g_warning("GError: '%s'\n", error->message);
  68
  69         if( contents != NULL ) {
  70                 lines = strsplit_no_copy(contents, '\n');
  71         } else {
  72                 g_warning("Badly formatted file found, ignoring: '%s'\n", path);
  73                 return NULL;
  74         }
  75
  76         ctx = g_new0(RFeedCtx, 1);
  77         ctx->path = g_strdup(path); /* store filesystem path to source file */
  78         ctx->last_seen = 0;
  79
  80         item = feed_item_new(NULL);
  81         item->data = ctx;
  82
  83         while( lines[i] ) {
  84                 if( parsing_headers && lines[i] && !strlen(lines[i]) ) {
  85                         parsing_headers = FALSE;
  86                         debug_print("RSSyl: finished parsing headers\n");
  87                 }
  88
  89                 if( parsing_headers ) {
  90                         line = g_strsplit(lines[i], ": ", 2);
  91                         if( line[0] && line[1] && strlen(line[0]) && lines[i][0] != ' ') {
  92                                 started_author = FALSE;
  93                                 started_subject = FALSE;
  94                                 started_link = FALSE;
  95                                 started_clink = FALSE;
  96
  97                                 /* Author */
  98                                 if( !strcmp(line[0], "From") ) {
  99                                         feed_item_set_author(item, line[1]);
 100                                         debug_print("RSSyl: got author '%s'\n", feed_item_get_author(item));
 101                                         started_author = TRUE;
 102                                 }
 103
 104                                 /* Date */
 105                                 if( !strcmp(line[0], "Date") ) {
 106                                         feed_item_set_date_modified(item,
 107                                                         procheader_date_parse(NULL, line[1], 0));
 108                                         debug_print("RSSyl: got date \n" );
 109                                 }
 110
 111                                 /* Title */
 112                                 if( !strcmp(line[0], "Subject") && !got_original_title ) {
 113                                         feed_item_set_title(item,line[1]);
 114                                         debug_print("RSSyl: got title '%s'\n", feed_item_get_title(item));
 115                                         started_subject = TRUE;
 116                                 }
 117
 118                                 /* Original (including HTML) title - Atom feeds */
 119                                 if( !strcmp(line[0], "X-RSSyl-OrigTitle") ) {
 120                                         feed_item_set_title(item, line[1]);
 121                                         debug_print("RSSyl: got original title '%s'\n",
 122                                                         feed_item_get_title(item));
 123                                         got_original_title = TRUE;
 124                                 }
 125
 126                                 /* URL */
 127                                 if( !strcmp(line[0], "X-RSSyl-URL") ) {
 128                                         feed_item_set_url(item, line[1]);
 129                                         debug_print("RSSyl: got link '%s'\n", feed_item_get_url(item));
 130                                         started_link = TRUE;
 131                                 }
 132
 133                                 /* Last-Seen timestamp */
 134                                 if( !strcmp(line[0], "X-RSSyl-Last-Seen") ) {
 135                                         ctx->last_seen = atol(line[1]);
 136                                         debug_print("RSSyl: got last_seen timestamp %ld\n", ctx->last_seen);
 137                                 }
 138
 139                                 /* ID */
 140                                 if( !strcmp(line[0], "Message-ID") ) {
 141                                         splid = g_strsplit_set(line[1], "<>", 3);
 142                                         if( strlen(splid[1]) != 0 )
 143                                                 feed_item_set_id(item, splid[1]);
 144                                         g_strfreev(splid);
 145                                 }
 146
 147                                 /* Feed comments */
 148                                 if( !strcmp(line[0], "X-RSSyl-Comments") ) {
 149                                         feed_item_set_comments_url(item, line[1]);
 150                                         debug_print("RSSyl: got clink '%s'\n", feed_item_get_comments_url(item));
 151                                         started_clink = TRUE;
 152                                 }
 153
 154                                 /* References */
 155                                 if( !strcmp(line[0], "References") ) {
 156                                         splid = g_strsplit_set(line[1], "<>", 3);
 157                                         if( strlen(splid[1]) != 0 )
 158                                                 feed_item_set_parent_id(item, line[1]);
 159                                         g_strfreev(splid);
 160                                 }
 161
 162                         } else if (lines[i][0] == ' ') {
 163                                 gchar *tmp = NULL;
 164                                 /* continuation line */
 165                                 if (started_author) {
 166                                         tmp = g_strdup_printf("%s %s", feed_item_get_author(item), lines[i]+1);
 167                                         feed_item_set_author(item, tmp);
 168                                         debug_print("RSSyl: updated author to '%s'\n", tmp);
 169                                         g_free(tmp);
 170                                 } else if (started_subject) {
 171                                         tmp = g_strdup_printf("%s %s", feed_item_get_title(item), lines[i]+1);
 172                                         feed_item_set_title(item, tmp);
 173                                         debug_print("RSSyl: updated title to '%s'\n", tmp);
 174                                         g_free(tmp);
 175                                 } else if (started_link) {
 176                                         tmp = g_strdup_printf("%s%s", feed_item_get_url(item), lines[i]+1);
 177                                         feed_item_set_url(item, tmp);
 178                                         debug_print("RSSyl: updated link to '%s'\n", tmp);
 179                                         g_free(tmp);
 180                                 } else if (started_clink) {
 181                                         tmp = g_strdup_printf("%s%s", feed_item_get_comments_url(item), lines[i]+1);
 182                                         feed_item_set_comments_url(item, tmp);
 183                                         debug_print("RSSyl: updated comments_link to '%s'\n", tmp);
 184                                 }
 185                         }
 186                         g_strfreev(line);
 187                 } else {
 188                         if( !strcmp(lines[i], RSSYL_TEXT_START) ) {
 189                                 debug_print("RSSyl: Leading html tag found at line %d\n", i);
 190                                 past_html_tag = TRUE;
 191                                 i++;
 192                                 continue;
 193                         }
 194                         while( past_html_tag && !past_endhtml_tag && lines[i] ) {
 195                                 if( !strcmp(lines[i], RSSYL_TEXT_END) ) {
 196                                         debug_print("RSSyl: Trailing html tag found at line %d\n", i);
 197                                         past_endhtml_tag = TRUE;
 198                                         i++;
 199                                         continue;
 200                                 }
 201                                 if( feed_item_get_text(item) != NULL ) {
 202                                         gint e_len, n_len;
 203                                         e_len = strlen(item->text);
 204                                         n_len = strlen(lines[i]);
 205                                         item->text = g_realloc(item->text, e_len + n_len + 2);
 206                                         *(item->text+e_len) = '\n';
 207                                         strcpy(item->text+e_len+1, lines[i]);
 208                                         *(item->text+e_len+n_len+1) = '\0';
 209                                 } else {
 210                                         item->text = g_strdup(lines[i]);
 211                                 }
 212                                 i++;
 213                         }
 214
 215                         if( lines[i] == NULL )
 216                                 return item;
 217                 }
 218
 219                 i++;
 220         }
 221         g_free(lines);
 222         g_free(contents);
 223         return item;
 224 }
 225
 226 static void rssyl_flush_folder_func(gpointer data, gpointer user_data)
 227 {
 228         FeedItem *item = (FeedItem *)data;
 229         RFeedCtx *ctx = (RFeedCtx *)item->data;
 230
 231         if( ctx != NULL && ctx->path != NULL)
 232                 g_free(ctx->path);
 233         feed_item_free(item);
 234 }
 235
 236 static void rssyl_folder_read_existing_real(RFolderItem *ritem)
 237 {
 238         gchar *path = NULL, *fname = NULL;
 239         DIR *dp;
 240         struct dirent *d;
 241         struct stat st;
 242         gint num;
 243         FeedItem *item = NULL;
 244         RFeedCtx *ctx;
 245
 246         g_return_if_fail(ritem != NULL);
 247
 248         path = folder_item_get_path(&ritem->item);
 249         g_return_if_fail(path != NULL);
 250
 251         debug_print("RSSyl: reading existing items from '%s'\n", path);
 252
 253         /* Flush contents if any, so we can add new */
 254         if( g_slist_length(ritem->items) > 0 ) {
 255                 g_slist_foreach(ritem->items, (GFunc)rssyl_flush_folder_func, NULL);
 256                 g_slist_free(ritem->items);
 257         }
 258         ritem->items = NULL;
 259         ritem->last_update = 0;
 260
 261         if( (dp = opendir(path)) == NULL ) {
 262                 FILE_OP_ERROR(path, "opendir");
 263                 g_free(path);
 264                 return;
 265         }
 266
 267         while( (d = readdir(dp)) != NULL ) {
 268                 if( claws_is_exiting() ) {
 269                         closedir(dp);
 270                         g_free(path);
 271                         return;
 272                 }
 273
 274                 if( d->d_name[0] != '.' && (num = to_number(d->d_name)) > 0 ) {
 275                         fname = g_strdup_printf("%s%c%s", path, G_DIR_SEPARATOR, d->d_name);
 276                         if( g_stat(fname, &st) < 0 ) {
 277                                 debug_print("RSSyl: couldn't stat() file '%s', ignoring it\n", fname);
 278                                 g_free(fname);
 279                                 continue;
 280                         }
 281
 282                         if( !S_ISREG(st.st_mode)) {
 283                                 debug_print("RSSyl: not a regular file: '%s', ignoring it\n", fname);
 284                                 g_free(fname);
 285                                 continue;
 286                         }
 287
 288                         debug_print("RSSyl: starting to parse '%s'\n", d->d_name);
 289                         if( (item = rssyl_parse_folder_item_file(fname)) != NULL ) {
 290                                 /* Find latest timestamp */
 291                                 ctx = (RFeedCtx *)item->data;
 292                                 if( ritem->last_update < ctx->last_seen )
 293                                         ritem->last_update = ctx->last_seen;
 294                                 debug_print("RSSyl: Appending '%s'\n", feed_item_get_title(item));
 295                                 ritem->items = g_slist_prepend(ritem->items, item);
 296                         }
 297                         g_free(fname);
 298                 }
 299         }
 300
 301         closedir(dp);
 302         g_free(path);
 303
 304         ritem->items = g_slist_reverse(ritem->items);
 305 }
 306
 307 #ifdef USE_PTHREAD
 308 static void *rssyl_read_existing_thr(void *arg)
 309 {
 310         RParseCtx *ctx = (RParseCtx *)arg;
 311
 312         rssyl_folder_read_existing_real(ctx->ritem);
 313         ctx->ready = TRUE;
 314         return NULL;
 315 }
 316 #endif
 317
 318 void rssyl_folder_read_existing(RFolderItem *ritem)
 319 {
 320 #ifdef USE_PTHREAD
 321         RParseCtx *ctx;
 322         pthread_t pt;
 323 #endif
 324
 325         g_return_if_fail(ritem != NULL);
 326
 327
 328 #ifdef USE_PTHREAD
 329         ctx = g_new0(RParseCtx, 1);
 330         ctx->ritem = ritem;
 331         ctx->ready = FALSE;
 332
 333         if( pthread_create(&pt, PTHREAD_CREATE_JOINABLE, rssyl_read_existing_thr,
 334                                 (void *)ctx) != 0 ) {
 335                 /* Couldn't create thread, let's continue non-threaded. */
 336                 rssyl_folder_read_existing_real(ritem);
 337         } else {
 338                 /* Thread started, wait until it is done. */
 339                 debug_print("RSSyl: waiting for thread to finish\n");
 340                 while( !ctx->ready ) {
 341                         claws_do_idle();
 342                 }
 343
 344                 debug_print("RSSyl: thread finished\n");
 345                 pthread_join(pt, NULL);
 346         }
 347
 348         g_free(ctx);
 349 #else
 350         rssyl_folder_read_existing_real(ritem);
 351 #endif
 352 }