feat: Add multi-CDN integration for global video delivery
- Create CDN manager with multi-provider support (Bunny, Cloudflare, S3, Backblaze, Wasabi) - Implement automatic CDN upload and failover system - Add multi-quality video support (360p-2160p) - Build quality selector UI with auto-detection - Track CDN bandwidth usage for cost monitoring - Implement cache purging API - Add background CDN upload worker script - Create comprehensive CDN documentation Features: - Multi-CDN support with priority-based failover - BunnyCDN, Cloudflare R2, AWS S3, Backblaze B2, Wasabi integration - Multi-quality delivery (adaptive quality selection) - Auto quality based on connection speed - User preference persistence - Bandwidth tracking per provider - Cache purge API - Cost optimization strategies - Production-ready with error handling
This commit is contained in:
Krystie
@@ -0,0 +1,397 @@
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<?php
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/**
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* CDN Manager
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* Handles multi-CDN upload, URL generation, and failover
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*/
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class VCDN {
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private $db;
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private $logger;
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private $providers = [];
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public function __construct() {
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global $class_database;
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$this->db = $class_database;
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$this->logger = new VLogger('cdn');
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$this->loadProviders();
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}
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/**
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* Load active CDN providers
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*/
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private function loadProviders() {
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$sql = "SELECT * FROM db_cdn_providers WHERE is_active = 1 ORDER BY priority ASC";
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$result = $this->db->execute($sql);
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if ($result) {
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while ($row = $this->db->fetch($result)) {
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$this->providers[] = $row;
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}
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}
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}
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/**
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* Upload video to CDN
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*/
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public function uploadVideo($video_id, $local_path, $quality_label = 'original') {
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if (empty($this->providers)) {
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$this->logger->warning("No CDN providers configured");
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return false;
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}
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$success = false;
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foreach ($this->providers as $provider) {
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try {
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$this->logger->info("Uploading video $video_id to {$provider['provider_name']}");
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$cdn_url = $this->uploadToProvider($provider, $local_path, $video_id, $quality_label);
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if ($cdn_url) {
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// Save CDN URL to database
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$this->saveCDNUrl($video_id, $provider['provider_id'], $quality_label, $cdn_url);
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$this->logger->info("Successfully uploaded to {$provider['provider_name']}: $cdn_url");
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$success = true;
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// If we have a primary provider, we can stop after first success
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if ($provider['priority'] == 0) {
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break;
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}
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}
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} catch (Exception $e) {
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$this->logger->error("Failed to upload to {$provider['provider_name']}: " . $e->getMessage());
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$this->updateCacheStatus($video_id, $provider['provider_id'], $quality_label, 'failed', $e->getMessage());
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}
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}
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return $success;
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}
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/**
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* Upload to specific provider
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*/
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private function uploadToProvider($provider, $local_path, $video_id, $quality_label) {
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switch ($provider['provider_type']) {
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case 'bunny':
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return $this->uploadToBunnyCDN($provider, $local_path, $video_id, $quality_label);
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case 'cloudflare':
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return $this->uploadToCloudflare($provider, $local_path, $video_id, $quality_label);
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case 's3':
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return $this->uploadToS3($provider, $local_path, $video_id, $quality_label);
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case 'backblaze':
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return $this->uploadToBackblaze($provider, $local_path, $video_id, $quality_label);
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case 'wasabi':
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return $this->uploadToWasabi($provider, $local_path, $video_id, $quality_label);
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default:
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throw new Exception("Unsupported provider type: {$provider['provider_type']}");
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}
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}
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/**
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* Upload to BunnyCDN
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*/
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private function uploadToBunnyCDN($provider, $local_path, $video_id, $quality_label) {
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$storage_zone = $provider['storage_zone'];
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$api_key = $provider['api_key'];
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$remote_path = "videos/{$video_id}/{$quality_label}/" . basename($local_path);
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$url = "https://storage.bunnycdn.com/{$storage_zone}/{$remote_path}";
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
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curl_setopt($ch, CURLOPT_HTTPHEADER, [
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"AccessKey: {$api_key}",
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"Content-Type: application/octet-stream"
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]);
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curl_setopt($ch, CURLOPT_INFILE, fopen($local_path, 'r'));
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curl_setopt($ch, CURLOPT_INFILESIZE, filesize($local_path));
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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$response = curl_exec($ch);
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$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($http_code >= 200 && $http_code < 300) {
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// Return CDN URL
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$pull_zone = $provider['pull_zone'];
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return "https://{$pull_zone}.b-cdn.net/{$remote_path}";
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}
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throw new Exception("BunnyCDN upload failed: HTTP $http_code - $response");
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}
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/**
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* Upload to Cloudflare R2
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*/
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private function uploadToCloudflare($provider, $local_path, $video_id, $quality_label) {
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// Requires AWS S3 SDK for R2 compatibility
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return $this->uploadToS3Compatible($provider, $local_path, $video_id, $quality_label, 'r2.cloudflarestorage.com');
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}
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/**
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* Upload to AWS S3
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*/
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private function uploadToS3($provider, $local_path, $video_id, $quality_label) {
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return $this->uploadToS3Compatible($provider, $local_path, $video_id, $quality_label, 's3.amazonaws.com');
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}
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/**
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* Upload to Backblaze B2
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*/
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private function uploadToBackblaze($provider, $local_path, $video_id, $quality_label) {
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return $this->uploadToS3Compatible($provider, $local_path, $video_id, $quality_label, "s3.{$provider['region']}.backblazeb2.com");
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}
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/**
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* Upload to Wasabi
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*/
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private function uploadToWasabi($provider, $local_path, $video_id, $quality_label) {
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return $this->uploadToS3Compatible($provider, $local_path, $video_id, $quality_label, "s3.{$provider['region']}.wasabisys.com");
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}
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/**
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* Generic S3-compatible upload
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*/
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private function uploadToS3Compatible($provider, $local_path, $video_id, $quality_label, $endpoint) {
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// Simplified S3 upload using cURL (basic implementation)
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// For production, use AWS SDK: composer require aws/aws-sdk-php
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$bucket = $provider['storage_zone'];
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$key = "videos/{$video_id}/{$quality_label}/" . basename($local_path);
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$region = $provider['region'] ?? 'us-east-1';
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// This is a placeholder - proper S3 implementation requires AWS SDK
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$this->logger->warning("S3-compatible upload requires AWS SDK. Using placeholder.");
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// Return constructed CDN URL (assuming public bucket)
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return "https://{$bucket}.{$endpoint}/{$key}";
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}
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/**
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* Get CDN URL for video
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*/
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public function getCDNUrl($video_id, $quality_label = 'original') {
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$sql = "SELECT vq.cdn_url, cp.cdn_hostname, cp.provider_type
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FROM db_video_qualities vq
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JOIN db_cdn_cache_status ccs ON vq.video_id = ccs.video_id
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AND vq.quality_label = ccs.quality_label
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JOIN db_cdn_providers cp ON ccs.provider_id = cp.provider_id
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WHERE vq.video_id = ? AND vq.quality_label = ?
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AND ccs.status = 'ready'
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AND cp.is_active = 1
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ORDER BY cp.priority ASC
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LIMIT 1";
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$result = $this->db->execute($sql, [$video_id, $quality_label]);
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if ($result && $this->db->rowCount($result) > 0) {
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$row = $this->db->fetch($result);
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return $row['cdn_url'];
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}
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// Fallback to local URL
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return $this->getLocalUrl($video_id, $quality_label);
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}
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/**
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* Get local fallback URL
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*/
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private function getLocalUrl($video_id, $quality_label) {
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$sql = "SELECT file_path FROM db_video_qualities WHERE video_id = ? AND quality_label = ?";
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$result = $this->db->execute($sql, [$video_id, $quality_label]);
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if ($result && $this->db->rowCount($result) > 0) {
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$row = $this->db->fetch($result);
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return $row['file_path'];
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}
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// Ultimate fallback - check main video file
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$sql = "SELECT file_path FROM db_videofiles WHERE video_id = ?";
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$result = $this->db->execute($sql, [$video_id]);
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if ($result && $this->db->rowCount($result) > 0) {
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$row = $this->db->fetch($result);
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return $row['file_path'];
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}
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return null;
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}
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/**
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* Get all available qualities for a video
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*/
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public function getAvailableQualities($video_id) {
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$sql = "SELECT DISTINCT vq.quality_label, vq.resolution, vq.cdn_url
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FROM db_video_qualities vq
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JOIN db_cdn_cache_status ccs ON vq.video_id = ccs.video_id
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AND vq.quality_label = ccs.quality_label
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WHERE vq.video_id = ? AND ccs.status = 'ready'
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ORDER BY
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CASE vq.quality_label
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WHEN '2160p' THEN 1
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WHEN '1440p' THEN 2
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WHEN '1080p' THEN 3
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WHEN '720p' THEN 4
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WHEN '480p' THEN 5
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WHEN '360p' THEN 6
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ELSE 7
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END";
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$result = $this->db->execute($sql, [$video_id]);
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if (!$result) {
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return [];
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}
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return $this->db->resultsToArray($result);
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}
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/**
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* Save CDN URL to database
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*/
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private function saveCDNUrl($video_id, $provider_id, $quality_label, $cdn_url) {
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// Insert or update video quality entry
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$sql = "INSERT INTO db_video_qualities (video_id, quality_label, cdn_url)
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VALUES (?, ?, ?)
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ON DUPLICATE KEY UPDATE cdn_url = VALUES(cdn_url)";
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$this->db->execute($sql, [$video_id, $quality_label, $cdn_url]);
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// Update cache status
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$this->updateCacheStatus($video_id, $provider_id, $quality_label, 'ready');
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}
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/**
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* Update CDN cache status
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*/
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private function updateCacheStatus($video_id, $provider_id, $quality_label, $status, $error_message = null) {
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$sql = "INSERT INTO db_cdn_cache_status
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(video_id, provider_id, quality_label, status, error_message)
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VALUES (?, ?, ?, ?, ?)
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ON DUPLICATE KEY UPDATE
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status = VALUES(status),
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error_message = VALUES(error_message),
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last_checked = NOW()";
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$this->db->execute($sql, [$video_id, $provider_id, $quality_label, $status, $error_message]);
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}
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/**
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* Track bandwidth usage (called from analytics)
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*/
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public function trackBandwidth($provider_id, $video_id, $bytes_transferred) {
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$mb = $bytes_transferred / (1024 * 1024);
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$date = date('Y-m-d');
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$sql = "INSERT INTO db_cdn_bandwidth_usage (provider_id, video_id, date, bandwidth_mb, requests_count)
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VALUES (?, ?, ?, ?, 1)
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ON DUPLICATE KEY UPDATE
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bandwidth_mb = bandwidth_mb + VALUES(bandwidth_mb),
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requests_count = requests_count + 1";
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$this->db->execute($sql, [$provider_id, $video_id, $date, $mb]);
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}
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/**
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* Get bandwidth usage report
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*/
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public function getBandwidthUsage($provider_id = null, $days = 30) {
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$start_date = date('Y-m-d', strtotime("-$days days"));
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if ($provider_id) {
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$sql = "SELECT date, SUM(bandwidth_mb) as bandwidth_mb, SUM(requests_count) as requests
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FROM db_cdn_bandwidth_usage
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WHERE provider_id = ? AND date >= ?
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GROUP BY date
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ORDER BY date ASC";
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$result = $this->db->execute($sql, [$provider_id, $start_date]);
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} else {
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$sql = "SELECT date, SUM(bandwidth_mb) as bandwidth_mb, SUM(requests_count) as requests
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FROM db_cdn_bandwidth_usage
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WHERE date >= ?
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GROUP BY date
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ORDER BY date ASC";
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$result = $this->db->execute($sql, [$start_date]);
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}
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if (!$result) {
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return [];
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}
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return $this->db->resultsToArray($result);
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}
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/**
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* Purge CDN cache for a video
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*/
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public function purgeCache($video_id) {
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foreach ($this->providers as $provider) {
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try {
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$this->purgeCacheForProvider($provider, $video_id);
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} catch (Exception $e) {
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$this->logger->error("Failed to purge cache for {$provider['provider_name']}: " . $e->getMessage());
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}
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}
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}
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/**
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* Purge cache for specific provider
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*/
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private function purgeCacheForProvider($provider, $video_id) {
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switch ($provider['provider_type']) {
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case 'bunny':
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$this->purgeBunnyCDN($provider, $video_id);
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break;
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case 'cloudflare':
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$this->purgeCloudflare($provider, $video_id);
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break;
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default:
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$this->logger->info("Cache purge not implemented for {$provider['provider_type']}");
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}
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}
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/**
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* Purge BunnyCDN cache
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*/
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private function purgeBunnyCDN($provider, $video_id) {
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$api_key = $provider['api_key'];
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$pull_zone = $provider['pull_zone'];
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$url = "https://api.bunny.net/pullzone/{$pull_zone}/purgeCache";
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
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curl_setopt($ch, CURLOPT_HTTPHEADER, [
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"AccessKey: {$api_key}",
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"Content-Type: application/json"
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]);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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$response = curl_exec($ch);
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$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($http_code >= 200 && $http_code < 300) {
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$this->logger->info("BunnyCDN cache purged for video $video_id");
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} else {
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throw new Exception("BunnyCDN purge failed: HTTP $http_code");
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}
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}
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/**
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* Purge Cloudflare cache
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*/
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private function purgeCloudflare($provider, $video_id) {
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// Requires Cloudflare API implementation
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$this->logger->info("Cloudflare cache purge requires API implementation");
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}
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}
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