update_daemon.php

   1 #!/usr/bin/php4
   2 <?php
   3         // this daemon runs in the background and updates all feeds
   4         // continuously
   5
   6         define('DEFAULT_ERROR_LEVEL', E_ALL);
   7
   8         declare(ticks = 1);
   9
  10         define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');
  11         define('DISABLE_SESSIONS', true);
  12
  13         define('PURGE_INTERVAL', 3600); // seconds
  14
  15         require_once "sanity_check.php";
  16         require_once "config.php";
  17
  18         if (!ENABLE_UPDATE_DAEMON) {
  19                 die("Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
  20         }
  21
  22         require_once "db.php";
  23         require_once "db-prefs.php";
  24         require_once "functions.php";
  25         require_once "magpierss/rss_fetch.inc";
  26
  27         function sigint_handler() {
  28                 unlink("update_daemon.lock");
  29                 die("Received SIGINT. Exiting.\n");
  30         }
  31
  32         pcntl_signal(SIGINT, sigint_handler);
  33
  34         $lock_handle = make_lockfile("update_daemon.lock");
  35
  36         if (!$lock_handle) {
  37                 die("error: Can't create lockfile ($lock_filename). ".
  38                         "Maybe another daemon is already running.\n");
  39         }
  40
  41         $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  42
  43         if (!$link) {
  44                 if (DB_TYPE == "mysql") {
  45                         print mysql_error();
  46                 }
  47                 // PG seems to display its own errors just fine by default.
  48                 return;
  49         }
  50
  51         if (DB_TYPE == "pgsql") {
  52                 pg_query("set client_encoding = 'utf-8'");
  53         }
  54
  55         $last_purge = 0;
  56
  57         while (true) {
  58
  59                 if (time() - $last_purge > PURGE_INTERVAL) {
  60                         print "Purging old posts (random 30 feeds)...\n";
  61                         global_purge_old_posts($link, true, 30);
  62                         $last_purge = time();
  63                 }
  64
  65                 // FIXME: get all scheduled updates w/forced refetch
  66                 // Stub, until I figure out if it is really needed.
  67
  68 #               $result = db_query($link, "SELECT * FROM ttrss_scheduled_updates ORDER BY id");
  69 #               while ($line = db_fetch_assoc($result)) {
  70 #                       print "Scheduled feed update: " . $line["feed_id"] . ", UID: " .
  71 #                               $line["owner_uid"] . "\n";
  72 #               }
  73
  74                 // Process all other feeds using last_updated and interval parameters
  75
  76                 $random_qpart = sql_random_function();
  77
  78 /*
  79                                         ttrss_entries.date_entered < NOW() - INTERVAL '$purge_interval days'");
  80                         }
  81
  82                         $rows = pg_affected_rows($result);
  83
  84                 } else {
  85
  86                         $result = db_query($link, "DELETE FROM ttrss_user_entries
  87                                 USING ttrss_user_entries, ttrss_entries
  88                                 WHERE ttrss_entries.id = ref_id AND
  89                                 marked = false AND
  90                                 feed_id = '$feed_id' AND
  91                                 ttrss_entries.date_entered < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)"); */
  92
  93                 if (DAEMON_UPDATE_LOGIN_LIMIT > 0) {
  94                         if (DB_TYPE == "pgsql") {
  95                                 $login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
  96                         } else {
  97                                 $login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
  98                         }
  99                 } else {
 100                         $login_thresh_qpart = "";
 101                 }
 102
 103                 $result = db_query($link, "SELECT feed_url,ttrss_feeds.id,owner_uid,
 104                                 SUBSTRING(last_updated,1,19) AS last_updated,
 105                                 update_interval
 106                         FROM
 107                                 ttrss_feeds,ttrss_users
 108                         WHERE
 109                                 ttrss_users.id = owner_uid $login_thresh_qpart
 110                         ORDER BY $random_qpart DESC");
 111
 112                 $user_prefs_cache = array();
 113
 114                 printf("Scheduled %d feeds to update...\n", db_num_rows($result));
 115
 116                 while ($line = db_fetch_assoc($result)) {
 117
 118                         $upd_intl = $line["update_interval"];
 119                         $user_id = $line["owner_uid"];
 120
 121                         if (!$upd_intl || $upd_intl == 0) {
 122                                 if (!$user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL']) {
 123                                         $upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
 124                                         $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'] = $upd_intl;
 125                                 } else {
 126                                         $upd_intl = $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'];
 127                                 }
 128                         }
 129
 130                         if ($upd_intl < 0) {
 131 #                               print "Updates disabled.\n";
 132                                 continue;
 133                         }
 134
 135                         print "Feed: " . $line["feed_url"] . ": ";
 136
 137                         printf("(%d/%d, %d) ", time() - strtotime($line["last_updated"]),
 138                                 $upd_intl*60, $user_id);
 139
 140                         if (!$line["last_updated"] ||
 141                                 time() - strtotime($line["last_updated"]) > ($upd_intl * 60)) {
 142
 143                                 print "Updating...\n";
 144                                 update_rss_feed($link, $line["feed_url"], $line["id"], true);
 145                                 sleep(1); // prevent flood (FIXME make this an option?)
 146                         } else {
 147                                 print "Update not needed.\n";
 148                         }
 149                 }
 150
 151                 print "Sleeping for " . DAEMON_SLEEP_INTERVAL . " seconds...\n";
 152
 153                 sleep(DAEMON_SLEEP_INTERVAL);
 154         }
 155
 156         db_close($link);
 157
 158 ?>