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         define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
   8
   9         declare(ticks = 1);
  10
  11         define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');
  12         define('DISABLE_SESSIONS', true);
  13
  14         require_once "version.php";
  15
  16         if (strpos(VERSION, ".99") !== false) {
  17                 define('DAEMON_EXTENDED_DEBUG', true);
  18         }
  19
  20         define('PURGE_INTERVAL', 3600); // seconds
  21
  22         require_once "sanity_check.php";
  23         require_once "config.php";
  24
  25         if (!ENABLE_UPDATE_DAEMON) {
  26                 die("Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
  27         }
  28
  29         require_once "db.php";
  30         require_once "db-prefs.php";
  31         require_once "functions.php";
  32         require_once "magpierss/rss_fetch.inc";
  33
  34         error_reporting(DEFAULT_ERROR_LEVEL);
  35
  36         function sigint_handler() {
  37                 unlink("update_daemon.lock");
  38                 die("Received SIGINT. Exiting.\n");
  39         }
  40
  41         function sigalrm_handler() {
  42                 die("received SIGALRM, hang in feed update?\n");
  43         }
  44
  45         pcntl_signal(SIGINT, sigint_handler);
  46         pcntl_signal(SIGALRM, sigalrm_handler);
  47
  48         $lock_handle = make_lockfile("update_daemon.lock");
  49
  50         if (!$lock_handle) {
  51                 die("error: Can't create lockfile ($lock_filename). ".
  52                         "Maybe another daemon is already running.\n");
  53         }
  54
  55         $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  56
  57         if (!$link) {
  58                 if (DB_TYPE == "mysql") {
  59                         print mysql_error();
  60                 }
  61                 // PG seems to display its own errors just fine by default.
  62                 return;
  63         }
  64
  65         if (DB_TYPE == "pgsql") {
  66                 pg_query("set client_encoding = 'utf-8'");
  67                 pg_set_client_encoding("UNICODE");
  68         } else {
  69                 if (defined('MYSQL_CHARSET') && MYSQL_CHARSET) {
  70                         db_query($link, "SET NAMES " . MYSQL_CHARSET);
  71 //                      db_query($link, "SET CHARACTER SET " . MYSQL_CHARSET);
  72                 }
  73         }
  74
  75         $last_purge = 0;
  76
  77         while (true) {
  78
  79                 if (!make_stampfile('update_daemon.stamp')) {
  80                         print "error: unable to create stampfile";
  81                         die;
  82                 }
  83
  84                 if (time() - $last_purge > PURGE_INTERVAL) {
  85                         _debug("Purging old posts (random 30 feeds)...");
  86                         global_purge_old_posts($link, true, 30);
  87                         $last_purge = time();
  88                 }
  89
  90                 // FIXME: get all scheduled updates w/forced refetch
  91                 // Stub, until I figure out if it is really needed.
  92
  93 #               $result = db_query($link, "SELECT * FROM ttrss_scheduled_updates ORDER BY id");
  94 #               while ($line = db_fetch_assoc($result)) {
  95 #                       print "Scheduled feed update: " . $line["feed_id"] . ", UID: " .
  96 #                               $line["owner_uid"] . "\n";
  97 #               }
  98
  99                 // Process all other feeds using last_updated and interval parameters
 100
 101                 $random_qpart = sql_random_function();
 102
 103 /*
 104                                         ttrss_entries.date_entered < NOW() - INTERVAL '$purge_interval days'");
 105                         }
 106
 107                         $rows = pg_affected_rows($result);
 108
 109                 } else {
 110
 111                         $result = db_query($link, "DELETE FROM ttrss_user_entries
 112                                 USING ttrss_user_entries, ttrss_entries
 113                                 WHERE ttrss_entries.id = ref_id AND
 114                                 marked = false AND
 115                                 feed_id = '$feed_id' AND
 116                                 ttrss_entries.date_entered < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)"); */
 117
 118                 if (DAEMON_UPDATE_LOGIN_LIMIT > 0) {
 119                         if (DB_TYPE == "pgsql") {
 120                                 $login_thresh_qpart = "AND ttrss_users.last_login >= NOW() - INTERVAL '".DAEMON_UPDATE_LOGIN_LIMIT." days'";
 121                         } else {
 122                                 $login_thresh_qpart = "AND ttrss_users.last_login >= DATE_SUB(NOW(), INTERVAL ".DAEMON_UPDATE_LOGIN_LIMIT." DAY)";
 123                         }
 124                 } else {
 125                         $login_thresh_qpart = "";
 126                 }
 127
 128                 $result = db_query($link, "SELECT feed_url,ttrss_feeds.id,owner_uid,
 129                                 SUBSTRING(last_updated,1,19) AS last_updated,
 130                                 update_interval
 131                         FROM
 132                                 ttrss_feeds,ttrss_users
 133                         WHERE
 134                                 ttrss_users.id = owner_uid $login_thresh_qpart
 135                         ORDER BY $random_qpart DESC");
 136
 137                 $user_prefs_cache = array();
 138
 139                 _debug(sprintf("Scheduled %d feeds to update...\n", db_num_rows($result)));
 140
 141                 while ($line = db_fetch_assoc($result)) {
 142
 143                         $upd_intl = $line["update_interval"];
 144                         $user_id = $line["owner_uid"];
 145
 146                         if (!$upd_intl || $upd_intl == 0) {
 147                                 if (!$user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL']) {
 148                                         $upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
 149                                         $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'] = $upd_intl;
 150                                 } else {
 151                                         $upd_intl = $user_prefs_cache[$user_id]['DEFAULT_UPDATE_INTERVAL'];
 152                                 }
 153                         }
 154
 155                         if ($upd_intl < 0) {
 156 #                               print "Updates disabled.\n";
 157                                 continue;
 158                         }
 159
 160                         _debug("Feed: " . $line["feed_url"]);
 161
 162 //                      _debug(sprintf("\tLU: %d, INTL: %d, UID: %d) ",
 163 //                              time() - strtotime($line["last_updated"]), $upd_intl*60, $user_id));
 164
 165                         if (!$line["last_updated"] ||
 166                                 time() - strtotime($line["last_updated"]) > ($upd_intl * 60)) {
 167
 168                                 _debug("Updating...");
 169
 170                                 pcntl_alarm(300);
 171
 172                                 update_rss_feed($link, $line["feed_url"], $line["id"], true);
 173
 174                                 pcntl_alarm(0);
 175
 176                                 sleep(1); // prevent flood (FIXME make this an option?)
 177                         } else {
 178                                 _debug("Update not needed.");
 179                         }
 180                 }
 181
 182                 if (DAEMON_SENDS_DIGESTS) send_headlines_digests($link);
 183
 184                 _debug("Sleeping for " . DAEMON_SLEEP_INTERVAL . " seconds...");
 185
 186                 sleep(DAEMON_SLEEP_INTERVAL);
 187         }
 188
 189         db_close($link);
 190
 191 ?>