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