init 4chan

tasks/signin_mailer.php

@@ -0,0 +1,125 @@
+<?php
+
+// Link expiration time. Will be isnerted the email message.
+define('LINK_TTL', '24 hours');
+// Time after which entries will be deleted even if the email wasn't sent
+define('ENTRY_TTL', 3600); // in seconds
+// Number of emails to send per run
+define('BATCH_SIZE', 100);
+// Table name
+define('TBL', 'email_signins_queue');
+
+// ---
+
+echo "[" . date('r') . "] - Mailer run started\n";
+
+// Only one mailer instance can run at a time
+$run_lock = fopen(sys_get_temp_dir() . '/signin_mailer.lock', 'a');
+
+if (!$run_lock) {
+  echo "Couldn't create lock file. Aborting\n";
+  exit(-1);
+}
+
+if (!flock($run_lock, LOCK_EX | LOCK_NB)) {
+  echo "Previous run hasn't finished yet. Aborting\n";
+  exit(0);
+}
+
+// ---
+
+require_once 'lib/db.php';
+
+set_time_limit(60);
+
+function send_email($email, $token) {
+  $ttl = LINK_TTL;
+  
+  $subject = "Email Verification Request";
+  $message =<<<MSG
+Hello,
+
+We have received a request to verify this email address for use on 4chan. If you requested this verification, please go to the following URL:
+
+https://sys.4chan.org/signin?action=verify&tkn=$token
+
+This link will expire in $ttl. You can use it multiple times to authorize as many of your devices as needed.
+
+If you did NOT request to verify this email address, do not click on the link.
+
+Sincerely,
+
+Team 4chan.
+MSG;
+  
+  $headers = "From: 4chan <noreply@4chan.org>\r\n";
+  $headers .= "MIME-Version: 1.0\r\n";
+  $headers .= "Content-Type: text/plain; charset=UTF-8\r\n";
+  
+  $opts = '-f noreply@4chan.org';
+  
+  return mail($email, $subject, $message, $headers, $opts);
+}
+
+// ---
+
+// Cleanup expired entries to not keep plaintext emails for too long.
+$tbl = TBL;
+
+$ttl = (int)ENTRY_TTL;
+
+$sql = "DELETE FROM `$tbl` WHERE created_on <= DATE_SUB(NOW(), INTERVAL $ttl SECOND)";
+
+$res = mysql_global_call($sql);
+
+if (!$res) {
+  echo "DB error while pruning stale entries. Aborting\n";
+  exit(-1);
+}
+
+// Start sending mails
+$batch_size = (int)BATCH_SIZE;
+
+$sql = "SELECT id, email, token FROM `$tbl` ORDER BY id ASC LIMIT $batch_size";
+
+$res = mysql_global_call($sql);
+
+if (!$res) {
+  echo "DB error while fetching entries. Aborting\n";
+  exit(-1);
+}
+
+$sent_count = 0;
+$error_count = 0;
+
+while ($row = mysql_fetch_assoc($res)) {
+  $id = (int)$row['id'];
+  $email = $row['email'];
+  $token = $row['token'];
+  
+  if (!$email || !$token) {
+    $error_count++;
+    continue;
+  }
+  
+  $ret = send_email($email, $token);
+  
+  if ($ret) {
+    $sent_count++;
+    $sql = "DELETE FROM `$tbl` WHERE id = $id LIMIT 1";
+    mysql_global_call($sql);
+  }
+  else {
+    $error_count++;
+  }
+  
+  //usleep(10000); // 10ms
+}
+
+// ---
+
+fclose($run_lock);
+
+echo "[" . date('r') . "] - Mailer run finished: sent $sent_count, errors $error_count\n";
+
+exit(0);