update_daemon.php

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