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