update_daemon.php

   1 #!/usr/bin/php
   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         define('DAEMON_EXTENDED_DEBUG', true);
  13
  14         define('PURGE_INTERVAL', 3600); // seconds
  15
  16         require_once "sanity_check.php";
  17         require_once "config.php";
  18
  19         if (!ENABLE_UPDATE_DAEMON) {
  20                 die("Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
  21         }
  22
  23         require_once "db.php";
  24         require_once "db-prefs.php";
  25         require_once "functions.php";
  26         require_once "magpierss/rss_fetch.inc";
  27
  28         error_reporting(E_ALL);
  29
  30         function sigint_handler() {
  31                 unlink("update_daemon.lock");
  32                 die("Received SIGINT. Exiting.\n");
  33         }
  34
  35         function sigalrm_handler() {
  36                 die("received SIGALRM, hang in feed update?\n");
  37         }
  38
  39         pcntl_signal(SIGINT, sigint_handler);
  40         pcntl_signal(SIGALRM, sigalrm_handler);
  41
  42         $lock_handle = make_lockfile("update_daemon.lock");
  43
  44         if (!$lock_handle) {
  45                 die("error: Can't create lockfile ($lock_filename). ".
  46                         "Maybe another daemon is already running.\n");
  47         }
  48
  49         $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  50
  51         if (!$link) {
  52                 if (DB_TYPE == "mysql") {
  53                         print mysql_error();
  54                 }
  55                 // PG seems to display its own errors just fine by default.
  56                 return;
  57         }
  58
  59         if (DB_TYPE == "pgsql") {
  60                 pg_query("set client_encoding = 'utf-8'");
  61                 pg_set_client_encoding("UNICODE");
  62         }
  63
  64         $last_purge = 0;
  65
  66         while (true) {
  67
  68                 if (time() - $last_purge > PURGE_INTERVAL) {
  69                         _debug("Purging old posts (random 30 feeds)...");
  70                         global_purge_old_posts($link, true, 30);
  71                         $last_purge = time();
  72                 }
  73
  74                 // FIXME: get all scheduled updates w/forced refetch
  75                 // Stub, until I figure out if it is really needed.
  76
  77 #               $result = db_query($link, "SELECT * FROM ttrss_scheduled_updates ORDER BY id");
  78 #               while ($line = db_fetch_assoc($result)) {
  79 #                       print "Scheduled feed update: " . $line["feed_id"] . ", UID: " .
  80 #                               $line["owner_uid"] . "\n";
  81 #               }
  82
  83                 // Process all other feeds using last_updated and interval parameters
  84
  85                 $random_qpart = sql_random_function();
  86
  87 /*
  88                                         ttrss_entries.date_entered < NOW() - INTERVAL '$purge_interval days'");
  89                         }
  90
  91                         $rows = pg_affected_rows($result);
  92
  93                 } else {
  94
  95                         $result = db_query($link, "DELETE FROM ttrss_user_entries
  96                                 USING ttrss_user_entries, ttrss_entries
  97                                 WHERE ttrss_entries.id = ref_id AND
  98                                 marked = false AND
  99                                 feed_id = '$feed_id' AND
 100                                 ttrss_entries.date_entered < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)"); */
 101
 102                 if (DAEMON_UPDATE_LOGIN_LIMIT > 0) {
 103                         if (DB_TYPE == "pgsql") {
 104                                 $login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
 105                         } else {
 106                                 $login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
 107                         }
 108                 } else {
 109                         $login_thresh_qpart = "";
 110                 }
 111
 112                 $result = db_query($link, "SELECT feed_url,ttrss_feeds.id,owner_uid,
 113                                 SUBSTRING(last_updated,1,19) AS last_updated,
 114                                 update_interval
 115                         FROM
 116                                 ttrss_feeds,ttrss_users
 117                         WHERE
 118                                 ttrss_users.id = owner_uid $login_thresh_qpart
 119                         ORDER BY $random_qpart DESC");
 120
 121                 $user_prefs_cache = array();
 122
 123                 _debug(sprintf("Scheduled %d feeds to update...\n", db_num_rows($result)));
 124
 125                 while ($line = db_fetch_assoc($result)) {
 126
 127                         $upd_intl = $line["update_interval"];
 128                         $user_id = $line["owner_uid"];
 129
 130                         if (!$upd_intl || $upd_intl == 0) {
 131                                 if (!$user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL']) {
 132                                         $upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
 133                                         $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'] = $upd_intl;
 134                                 } else {
 135                                         $upd_intl = $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'];
 136                                 }
 137                         }
 138
 139                         if ($upd_intl < 0) {
 140 #                               print "Updates disabled.\n";
 141                                 continue;
 142                         }
 143
 144                         _debug("Feed: " . $line["feed_url"]);
 145
 146 //                      _debug(sprintf("\tLU: %d, INTL: %d, UID: %d) ",
 147 //                              time() - strtotime($line["last_updated"]), $upd_intl*60, $user_id));
 148
 149                         if (!$line["last_updated"] ||
 150                                 time() - strtotime($line["last_updated"]) > ($upd_intl * 60)) {
 151
 152                                 _debug("Updating...");
 153
 154                                 if (defined('MAGPIE_FETCH_TIME_OUT')) {
 155                                         pcntl_alarm(MAGPIE_FETCH_TIME_OUT * 2);
 156                                 } else {
 157                                         pcntl_alarm(300);
 158                                 }
 159
 160                                 update_rss_feed($link, $line["feed_url"], $line["id"], true);
 161
 162                                 pcntl_alarm(0);
 163
 164                                 sleep(1); // prevent flood (FIXME make this an option?)
 165                         } else {
 166                                 _debug("Update not needed.");
 167                         }
 168                 }
 169
 170                 if (DAEMON_SENDS_DIGESTS) send_headlines_digests($link);
 171
 172                 _debug("Sleeping for " . DAEMON_SLEEP_INTERVAL . " seconds...");
 173
 174                 sleep(DAEMON_SLEEP_INTERVAL);
 175         }
 176
 177         db_close($link);
 178
 179 ?>