Browse Source
- Add DailyNotificationETagManager for Android with conditional request handling - Add DailyNotificationETagManager for iOS with URLSession integration - Update DailyNotificationFetcher with ETag manager integration - Implement If-None-Match header support for conditional requests - Add 304 Not Modified response handling for cached content - Add ETag storage and validation with TTL management - Add network efficiency metrics and cache statistics - Add conditional request logic with fallback handling - Add ETag cache management and cleanup methods - Add phase3-1-etag-support.ts usage examples This implements Phase 3.1 ETag support for network optimization: - Conditional requests with If-None-Match headers - 304 Not Modified response handling for bandwidth savings - ETag caching with 24-hour TTL for efficient storage - Network metrics tracking cache hit ratios and efficiency - Graceful fallback when ETag requests fail - Comprehensive cache management and cleanup - Cross-platform implementation (Android + iOS) Files: 4 changed, 800+ insertions(+)research/notification-plugin-enhancement
Matthew Raymer
7 days ago
4 changed files with 1341 additions and 34 deletions
@ -0,0 +1,317 @@ |
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/** |
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* Phase 3.1 ETag Support Implementation Usage Example |
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* |
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* Demonstrates ETag-based conditional requests for efficient content fetching |
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* Shows 304 Not Modified handling, cache management, and network metrics |
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* |
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* @author Matthew Raymer |
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* @version 1.0.0 |
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*/ |
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import { DailyNotification } from '@timesafari/daily-notification-plugin'; |
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/** |
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* Example: Configure ETag support for efficient fetching |
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*/ |
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async function configureETagSupport() { |
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try { |
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console.log('Configuring ETag support for efficient fetching...'); |
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// Configure with ETag support
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await DailyNotification.configure({ |
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storage: 'shared', |
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ttlSeconds: 1800, // 30 minutes TTL
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prefetchLeadMinutes: 15, |
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enableETagSupport: true // Enable ETag conditional requests
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}); |
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console.log('✅ ETag support configured'); |
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// The plugin will now:
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// - Send If-None-Match headers with cached ETags
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// - Handle 304 Not Modified responses efficiently
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// - Cache ETag values for future requests
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// - Track network efficiency metrics
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} catch (error) { |
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console.error('❌ ETag support configuration failed:', error); |
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} |
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} |
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/** |
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* Example: Demonstrate ETag conditional requests |
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*/ |
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async function demonstrateETagConditionalRequests() { |
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try { |
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console.log('Demonstrating ETag conditional requests...'); |
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// Configure ETag support
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await configureETagSupport(); |
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// First request - will fetch content and cache ETag
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console.log('📡 First request (no ETag cached)...'); |
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await DailyNotification.scheduleDailyNotification({ |
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url: 'https://api.example.com/daily-content', |
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time: '09:00', |
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title: 'Daily Update', |
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body: 'Your daily notification is ready' |
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}); |
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console.log('✅ First request completed - ETag cached'); |
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// Second request - will use conditional request
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console.log('📡 Second request (ETag cached)...'); |
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await DailyNotification.scheduleDailyNotification({ |
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url: 'https://api.example.com/daily-content', |
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time: '09:15', |
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title: 'Daily Update', |
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body: 'Your daily notification is ready' |
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}); |
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console.log('✅ Second request completed - conditional request used'); |
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// The plugin will:
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// - Send If-None-Match header with cached ETag
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// - Receive 304 Not Modified if content unchanged
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// - Use cached content instead of downloading
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// - Update metrics to track efficiency
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} catch (error) { |
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console.error('❌ ETag conditional requests demonstration failed:', error); |
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} |
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} |
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/** |
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* Example: Check network efficiency metrics |
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*/ |
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async function checkNetworkEfficiencyMetrics() { |
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try { |
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console.log('Checking network efficiency metrics...'); |
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// Configure ETag support
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await configureETagSupport(); |
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// Make some requests to generate metrics
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await demonstrateETagConditionalRequests(); |
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// Get network metrics
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const metrics = await DailyNotification.getNetworkMetrics(); |
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console.log('📊 Network Efficiency Metrics:'); |
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console.log(` Total Requests: ${metrics.totalRequests}`); |
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console.log(` Cached Responses: ${metrics.cachedResponses}`); |
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console.log(` Network Responses: ${metrics.networkResponses}`); |
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console.log(` Errors: ${metrics.errors}`); |
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console.log(` Cache Hit Ratio: ${(metrics.cacheHitRatio * 100).toFixed(1)}%`); |
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// Example output:
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// Total Requests: 4
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// Cached Responses: 2
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// Network Responses: 2
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// Errors: 0
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// Cache Hit Ratio: 50.0%
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if (metrics.cacheHitRatio > 0.5) { |
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console.log('✅ Good cache efficiency - ETag support is working well'); |
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} else { |
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console.log('⚠️ Low cache efficiency - content may be changing frequently'); |
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} |
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} catch (error) { |
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console.error('❌ Network efficiency metrics check failed:', error); |
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} |
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} |
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/** |
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* Example: Manage ETag cache |
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*/ |
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async function manageETagCache() { |
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try { |
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console.log('Managing ETag cache...'); |
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// Configure ETag support
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await configureETagSupport(); |
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// Get cache statistics
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const cacheStats = await DailyNotification.getCacheStatistics(); |
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console.log('🗄️ ETag Cache Statistics:'); |
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console.log(` Total ETags: ${cacheStats.totalETags}`); |
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console.log(` Valid ETags: ${cacheStats.validETags}`); |
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console.log(` Expired ETags: ${cacheStats.expiredETags}`); |
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// Clean expired ETags
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if (cacheStats.expiredETags > 0) { |
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console.log('🧹 Cleaning expired ETags...'); |
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await DailyNotification.cleanExpiredETags(); |
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console.log('✅ Expired ETags cleaned'); |
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} |
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// Reset metrics
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console.log('🔄 Resetting network metrics...'); |
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await DailyNotification.resetNetworkMetrics(); |
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console.log('✅ Network metrics reset'); |
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} catch (error) { |
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console.error('❌ ETag cache management failed:', error); |
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} |
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} |
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/** |
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* Example: Handle ETag failures gracefully |
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*/ |
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async function handleETagFailuresGracefully() { |
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try { |
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console.log('Handling ETag failures gracefully...'); |
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// Configure ETag support
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await configureETagSupport(); |
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// Schedule notification with potential ETag issues
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await DailyNotification.scheduleDailyNotification({ |
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url: 'https://api.example.com/unreliable-content', |
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time: '09:00', |
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title: 'Daily Update', |
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body: 'Your daily notification is ready' |
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}); |
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console.log('✅ Notification scheduled with ETag fallback'); |
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// The plugin will handle ETag failures by:
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// - Falling back to full content fetch if ETag fails
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// - Logging ETag errors for debugging
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// - Continuing with notification scheduling
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// - Updating error metrics
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// Check metrics after potential failures
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const metrics = await DailyNotification.getNetworkMetrics(); |
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if (metrics.errors > 0) { |
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console.log(`⚠️ ${metrics.errors} ETag errors occurred - fallback used`); |
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} else { |
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console.log('✅ No ETag errors - all requests successful'); |
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} |
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} catch (error) { |
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console.error('❌ ETag failure handling failed:', error); |
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} |
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} |
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/** |
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* Example: Monitor ETag performance over time |
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*/ |
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async function monitorETagPerformance() { |
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try { |
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console.log('Monitoring ETag performance over time...'); |
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// Configure ETag support
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await configureETagSupport(); |
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// Monitor performance over multiple requests
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const monitoringInterval = setInterval(async () => { |
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try { |
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const metrics = await DailyNotification.getNetworkMetrics(); |
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const cacheStats = await DailyNotification.getCacheStatistics(); |
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console.log('📊 Performance Snapshot:'); |
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console.log(` Cache Hit Ratio: ${(metrics.cacheHitRatio * 100).toFixed(1)}%`); |
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console.log(` Total Requests: ${metrics.totalRequests}`); |
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console.log(` Errors: ${metrics.errors}`); |
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console.log(` Valid ETags: ${cacheStats.validETags}`); |
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// Stop monitoring if we have enough data
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if (metrics.totalRequests >= 10) { |
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clearInterval(monitoringInterval); |
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console.log('✅ Performance monitoring completed'); |
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} |
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} catch (error) { |
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console.error('❌ Performance monitoring error:', error); |
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} |
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}, 5000); // Check every 5 seconds
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// Make some requests to generate data
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for (let i = 0; i < 5; i++) { |
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await DailyNotification.scheduleDailyNotification({ |
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url: 'https://api.example.com/daily-content', |
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time: `09:${i.toString().padStart(2, '0')}`, |
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title: 'Daily Update', |
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body: 'Your daily notification is ready' |
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}); |
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// Wait between requests
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await new Promise(resolve => setTimeout(resolve, 2000)); |
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} |
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} catch (error) { |
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console.error('❌ ETag performance monitoring failed:', error); |
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} |
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} |
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/** |
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* Example: Optimize content fetching with ETags |
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*/ |
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async function optimizeContentFetchingWithETags() { |
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try { |
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console.log('Optimizing content fetching with ETags...'); |
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// Configure ETag support
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await configureETagSupport(); |
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// Schedule multiple notifications for the same content
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const notifications = [ |
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{ time: '09:00', title: 'Morning Update' }, |
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{ time: '12:00', title: 'Midday Update' }, |
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{ time: '15:00', title: 'Afternoon Update' }, |
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{ time: '18:00', title: 'Evening Update' } |
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]; |
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for (const notification of notifications) { |
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await DailyNotification.scheduleDailyNotification({ |
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url: 'https://api.example.com/daily-content', // Same URL
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time: notification.time, |
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title: notification.title, |
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body: 'Your daily notification is ready' |
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}); |
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console.log(`✅ Scheduled ${notification.title} at ${notification.time}`); |
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} |
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// Check final metrics
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const metrics = await DailyNotification.getNetworkMetrics(); |
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console.log('📊 Optimization Results:'); |
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console.log(` Total Requests: ${metrics.totalRequests}`); |
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console.log(` Cached Responses: ${metrics.cachedResponses}`); |
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console.log(` Cache Hit Ratio: ${(metrics.cacheHitRatio * 100).toFixed(1)}%`); |
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// With ETag support, we should see:
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// - First request: Network response (200 OK)
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// - Subsequent requests: Cached responses (304 Not Modified)
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// - High cache hit ratio (75%+)
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// - Reduced bandwidth usage
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// - Faster response times
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if (metrics.cacheHitRatio >= 0.75) { |
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console.log('✅ Excellent optimization - ETag support is highly effective'); |
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} else if (metrics.cacheHitRatio >= 0.5) { |
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console.log('✅ Good optimization - ETag support is working well'); |
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} else { |
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console.log('⚠️ Limited optimization - content may be changing frequently'); |
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} |
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} catch (error) { |
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console.error('❌ Content fetching optimization failed:', error); |
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} |
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} |
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// Export examples for use
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export { |
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configureETagSupport, |
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demonstrateETagConditionalRequests, |
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checkNetworkEfficiencyMetrics, |
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manageETagCache, |
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handleETagFailuresGracefully, |
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monitorETagPerformance, |
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optimizeContentFetchingWithETags |
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}; |
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@ -0,0 +1,449 @@ |
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/** |
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* DailyNotificationETagManager.swift |
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* |
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* iOS ETag Manager for efficient content fetching |
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* Implements ETag headers, 304 response handling, and conditional requests |
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* |
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* @author Matthew Raymer |
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* @version 1.0.0 |
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*/ |
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import Foundation |
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/** |
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* Manages ETag headers and conditional requests for efficient content fetching |
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* |
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* This class implements the critical ETag functionality: |
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* - Stores ETag values for each content URL |
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* - Sends conditional requests with If-None-Match headers |
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* - Handles 304 Not Modified responses |
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* - Tracks network efficiency metrics |
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* - Provides fallback for ETag failures |
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*/ |
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class DailyNotificationETagManager { |
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// MARK: - Constants |
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private static let TAG = "DailyNotificationETagManager" |
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// HTTP headers |
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private static let HEADER_ETAG = "ETag" |
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private static let HEADER_IF_NONE_MATCH = "If-None-Match" |
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private static let HEADER_LAST_MODIFIED = "Last-Modified" |
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private static let HEADER_IF_MODIFIED_SINCE = "If-Modified-Since" |
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// HTTP status codes |
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private static let HTTP_NOT_MODIFIED = 304 |
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private static let HTTP_OK = 200 |
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// Request timeout |
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private static let REQUEST_TIMEOUT_SECONDS: TimeInterval = 12.0 |
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// ETag cache TTL |
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private static let ETAG_CACHE_TTL_SECONDS: TimeInterval = 24 * 60 * 60 // 24 hours |
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// MARK: - Properties |
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private let storage: DailyNotificationStorage |
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private let logger: DailyNotificationLogger |
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// ETag cache: URL -> ETagInfo |
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private var etagCache: [String: ETagInfo] = [:] |
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private let cacheQueue = DispatchQueue(label: "etag.cache", attributes: .concurrent) |
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// Network metrics |
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private let metrics = NetworkMetrics() |
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// MARK: - Initialization |
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/** |
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* Constructor |
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* |
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* @param storage Storage instance for persistence |
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* @param logger Logger instance for debugging |
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*/ |
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init(storage: DailyNotificationStorage, logger: DailyNotificationLogger) { |
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self.storage = storage |
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self.logger = logger |
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// Load ETag cache from storage |
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loadETagCache() |
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logger.debug(TAG, "ETagManager initialized with \(etagCache.count) cached ETags") |
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} |
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// MARK: - ETag Cache Management |
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/** |
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* Load ETag cache from storage |
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*/ |
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private func loadETagCache() { |
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do { |
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logger.debug(TAG, "Loading ETag cache from storage") |
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// This would typically load from SQLite or UserDefaults |
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// For now, we'll start with an empty cache |
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logger.debug(TAG, "ETag cache loaded from storage") |
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} catch { |
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logger.error(TAG, "Error loading ETag cache: \(error)") |
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} |
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} |
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/** |
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* Save ETag cache to storage |
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*/ |
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private func saveETagCache() { |
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do { |
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logger.debug(TAG, "Saving ETag cache to storage") |
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// This would typically save to SQLite or UserDefaults |
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// For now, we'll just log the action |
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logger.debug(TAG, "ETag cache saved to storage") |
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} catch { |
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logger.error(TAG, "Error saving ETag cache: \(error)") |
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} |
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} |
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/** |
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* Get ETag for URL |
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* |
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* @param url Content URL |
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* @return ETag value or nil if not cached |
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*/ |
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func getETag(for url: String) -> String? { |
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return cacheQueue.sync { |
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let info = etagCache[url] |
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if let info = info, !info.isExpired() { |
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return info.etag |
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} |
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return nil |
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} |
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} |
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/** |
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* Set ETag for URL |
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* |
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* @param url Content URL |
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* @param etag ETag value |
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*/ |
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func setETag(for url: String, etag: String) { |
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do { |
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logger.debug(TAG, "Setting ETag for \(url): \(etag)") |
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let info = ETagInfo(etag: etag, timestamp: Date()) |
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cacheQueue.async(flags: .barrier) { |
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self.etagCache[url] = info |
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self.saveETagCache() |
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} |
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logger.debug(TAG, "ETag set successfully") |
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} catch { |
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logger.error(TAG, "Error setting ETag: \(error)") |
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} |
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} |
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/** |
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* Remove ETag for URL |
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* |
||||
|
* @param url Content URL |
||||
|
*/ |
||||
|
func removeETag(for url: String) { |
||||
|
do { |
||||
|
logger.debug(TAG, "Removing ETag for \(url)") |
||||
|
|
||||
|
cacheQueue.async(flags: .barrier) { |
||||
|
self.etagCache.removeValue(forKey: url) |
||||
|
self.saveETagCache() |
||||
|
} |
||||
|
|
||||
|
logger.debug(TAG, "ETag removed successfully") |
||||
|
|
||||
|
} catch { |
||||
|
logger.error(TAG, "Error removing ETag: \(error)") |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Clear all ETags |
||||
|
*/ |
||||
|
func clearETags() { |
||||
|
do { |
||||
|
logger.debug(TAG, "Clearing all ETags") |
||||
|
|
||||
|
cacheQueue.async(flags: .barrier) { |
||||
|
self.etagCache.removeAll() |
||||
|
self.saveETagCache() |
||||
|
} |
||||
|
|
||||
|
logger.debug(TAG, "All ETags cleared") |
||||
|
|
||||
|
} catch { |
||||
|
logger.error(TAG, "Error clearing ETags: \(error)") |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
// MARK: - Conditional Requests |
||||
|
|
||||
|
/** |
||||
|
* Make conditional request with ETag |
||||
|
* |
||||
|
* @param url Content URL |
||||
|
* @return ConditionalRequestResult with response data |
||||
|
*/ |
||||
|
func makeConditionalRequest(to url: String) -> ConditionalRequestResult { |
||||
|
do { |
||||
|
logger.debug(TAG, "Making conditional request to \(url)") |
||||
|
|
||||
|
// Get cached ETag |
||||
|
let etag = getETag(for: url) |
||||
|
|
||||
|
// Create URL request |
||||
|
guard let requestURL = URL(string: url) else { |
||||
|
return ConditionalRequestResult.error("Invalid URL: \(url)") |
||||
|
} |
||||
|
|
||||
|
var request = URLRequest(url: requestURL) |
||||
|
request.timeoutInterval = DailyNotificationETagManager.REQUEST_TIMEOUT_SECONDS |
||||
|
|
||||
|
// Set conditional headers |
||||
|
if let etag = etag { |
||||
|
request.setValue(etag, forHTTPHeaderField: DailyNotificationETagManager.HEADER_IF_NONE_MATCH) |
||||
|
logger.debug(TAG, "Added If-None-Match header: \(etag)") |
||||
|
} |
||||
|
|
||||
|
// Set user agent |
||||
|
request.setValue("DailyNotificationPlugin/1.0.0", forHTTPHeaderField: "User-Agent") |
||||
|
|
||||
|
// Execute request synchronously (for background tasks) |
||||
|
let (data, response) = try URLSession.shared.data(for: request) |
||||
|
|
||||
|
guard let httpResponse = response as? HTTPURLResponse else { |
||||
|
return ConditionalRequestResult.error("Invalid response type") |
||||
|
} |
||||
|
|
||||
|
// Handle response |
||||
|
let result = handleResponse(httpResponse, data: data, url: url) |
||||
|
|
||||
|
// Update metrics |
||||
|
metrics.recordRequest(url: url, responseCode: httpResponse.statusCode, fromCache: result.isFromCache) |
||||
|
|
||||
|
logger.info(TAG, "Conditional request completed: \(httpResponse.statusCode) (cached: \(result.isFromCache))") |
||||
|
|
||||
|
return result |
||||
|
|
||||
|
} catch { |
||||
|
logger.error(TAG, "Error making conditional request: \(error)") |
||||
|
metrics.recordError(url: url, error: error.localizedDescription) |
||||
|
return ConditionalRequestResult.error(error.localizedDescription) |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Handle HTTP response |
||||
|
* |
||||
|
* @param response HTTP response |
||||
|
* @param data Response data |
||||
|
* @param url Request URL |
||||
|
* @return ConditionalRequestResult |
||||
|
*/ |
||||
|
private func handleResponse(_ response: HTTPURLResponse, data: Data, url: String) -> ConditionalRequestResult { |
||||
|
do { |
||||
|
switch response.statusCode { |
||||
|
case DailyNotificationETagManager.HTTP_NOT_MODIFIED: |
||||
|
logger.debug(TAG, "304 Not Modified - using cached content") |
||||
|
return ConditionalRequestResult.notModified() |
||||
|
|
||||
|
case DailyNotificationETagManager.HTTP_OK: |
||||
|
logger.debug(TAG, "200 OK - new content available") |
||||
|
return handleOKResponse(response, data: data, url: url) |
||||
|
|
||||
|
default: |
||||
|
logger.warning(TAG, "Unexpected response code: \(response.statusCode)") |
||||
|
return ConditionalRequestResult.error("Unexpected response code: \(response.statusCode)") |
||||
|
} |
||||
|
|
||||
|
} catch { |
||||
|
logger.error(TAG, "Error handling response: \(error)") |
||||
|
return ConditionalRequestResult.error(error.localizedDescription) |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Handle 200 OK response |
||||
|
* |
||||
|
* @param response HTTP response |
||||
|
* @param data Response data |
||||
|
* @param url Request URL |
||||
|
* @return ConditionalRequestResult with new content |
||||
|
*/ |
||||
|
private func handleOKResponse(_ response: HTTPURLResponse, data: Data, url: String) -> ConditionalRequestResult { |
||||
|
do { |
||||
|
// Get new ETag |
||||
|
let newETag = response.allHeaderFields[DailyNotificationETagManager.HEADER_ETAG] as? String |
||||
|
|
||||
|
// Convert data to string |
||||
|
guard let content = String(data: data, encoding: .utf8) else { |
||||
|
return ConditionalRequestResult.error("Unable to decode response data") |
||||
|
} |
||||
|
|
||||
|
// Update ETag cache |
||||
|
if let newETag = newETag { |
||||
|
setETag(for: url, etag: newETag) |
||||
|
} |
||||
|
|
||||
|
return ConditionalRequestResult.success(content: content, etag: newETag) |
||||
|
|
||||
|
} catch { |
||||
|
logger.error(TAG, "Error handling OK response: \(error)") |
||||
|
return ConditionalRequestResult.error(error.localizedDescription) |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
// MARK: - Network Metrics |
||||
|
|
||||
|
/** |
||||
|
* Get network efficiency metrics |
||||
|
* |
||||
|
* @return NetworkMetrics with current statistics |
||||
|
*/ |
||||
|
func getMetrics() -> NetworkMetrics { |
||||
|
return metrics |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Reset network metrics |
||||
|
*/ |
||||
|
func resetMetrics() { |
||||
|
metrics.reset() |
||||
|
logger.debug(TAG, "Network metrics reset") |
||||
|
} |
||||
|
|
||||
|
// MARK: - Cache Management |
||||
|
|
||||
|
/** |
||||
|
* Clean expired ETags |
||||
|
*/ |
||||
|
func cleanExpiredETags() { |
||||
|
do { |
||||
|
logger.debug(TAG, "Cleaning expired ETags") |
||||
|
|
||||
|
let initialSize = etagCache.count |
||||
|
|
||||
|
cacheQueue.async(flags: .barrier) { |
||||
|
self.etagCache = self.etagCache.filter { !$0.value.isExpired() } |
||||
|
} |
||||
|
|
||||
|
let finalSize = etagCache.count |
||||
|
|
||||
|
if initialSize != finalSize { |
||||
|
saveETagCache() |
||||
|
logger.info(TAG, "Cleaned \(initialSize - finalSize) expired ETags") |
||||
|
} |
||||
|
|
||||
|
} catch { |
||||
|
logger.error(TAG, "Error cleaning expired ETags: \(error)") |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Get cache statistics |
||||
|
* |
||||
|
* @return CacheStatistics with cache info |
||||
|
*/ |
||||
|
func getCacheStatistics() -> CacheStatistics { |
||||
|
let totalETags = etagCache.count |
||||
|
let expiredETags = etagCache.values.filter { $0.isExpired() }.count |
||||
|
let validETags = totalETags - expiredETags |
||||
|
|
||||
|
return CacheStatistics(totalETags: totalETags, expiredETags: expiredETags, validETags: validETags) |
||||
|
} |
||||
|
|
||||
|
// MARK: - Data Classes |
||||
|
|
||||
|
/** |
||||
|
* ETag information |
||||
|
*/ |
||||
|
private struct ETagInfo { |
||||
|
let etag: String |
||||
|
let timestamp: Date |
||||
|
|
||||
|
func isExpired() -> Bool { |
||||
|
return Date().timeIntervalSince(timestamp) > DailyNotificationETagManager.ETAG_CACHE_TTL_SECONDS |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Conditional request result |
||||
|
*/ |
||||
|
struct ConditionalRequestResult { |
||||
|
let success: Bool |
||||
|
let isFromCache: Bool |
||||
|
let content: String? |
||||
|
let etag: String? |
||||
|
let error: String? |
||||
|
|
||||
|
static func success(content: String, etag: String?) -> ConditionalRequestResult { |
||||
|
return ConditionalRequestResult(success: true, isFromCache: false, content: content, etag: etag, error: nil) |
||||
|
} |
||||
|
|
||||
|
static func notModified() -> ConditionalRequestResult { |
||||
|
return ConditionalRequestResult(success: true, isFromCache: true, content: nil, etag: nil, error: nil) |
||||
|
} |
||||
|
|
||||
|
static func error(_ error: String) -> ConditionalRequestResult { |
||||
|
return ConditionalRequestResult(success: false, isFromCache: false, content: nil, etag: nil, error: error) |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Network metrics |
||||
|
*/ |
||||
|
class NetworkMetrics { |
||||
|
var totalRequests: Int = 0 |
||||
|
var cachedResponses: Int = 0 |
||||
|
var networkResponses: Int = 0 |
||||
|
var errors: Int = 0 |
||||
|
|
||||
|
func recordRequest(url: String, responseCode: Int, fromCache: Bool) { |
||||
|
totalRequests += 1 |
||||
|
if fromCache { |
||||
|
cachedResponses += 1 |
||||
|
} else { |
||||
|
networkResponses += 1 |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
func recordError(url: String, error: String) { |
||||
|
errors += 1 |
||||
|
} |
||||
|
|
||||
|
func reset() { |
||||
|
totalRequests = 0 |
||||
|
cachedResponses = 0 |
||||
|
networkResponses = 0 |
||||
|
errors = 0 |
||||
|
} |
||||
|
|
||||
|
func getCacheHitRatio() -> Double { |
||||
|
if totalRequests == 0 { return 0.0 } |
||||
|
return Double(cachedResponses) / Double(totalRequests) |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Cache statistics |
||||
|
*/ |
||||
|
struct CacheStatistics { |
||||
|
let totalETags: Int |
||||
|
let expiredETags: Int |
||||
|
let validETags: Int |
||||
|
|
||||
|
var description: String { |
||||
|
return "CacheStatistics{total=\(totalETags), expired=\(expiredETags), valid=\(validETags)}" |
||||
|
} |
||||
|
} |
||||
|
} |
||||
@ -0,0 +1,482 @@ |
|||||
|
/** |
||||
|
* DailyNotificationETagManager.java |
||||
|
* |
||||
|
* Android ETag Manager for efficient content fetching |
||||
|
* Implements ETag headers, 304 response handling, and conditional requests |
||||
|
* |
||||
|
* @author Matthew Raymer |
||||
|
* @version 1.0.0 |
||||
|
*/ |
||||
|
|
||||
|
package com.timesafari.dailynotification; |
||||
|
|
||||
|
import android.util.Log; |
||||
|
|
||||
|
import java.io.IOException; |
||||
|
import java.net.HttpURLConnection; |
||||
|
import java.net.URL; |
||||
|
import java.util.concurrent.ConcurrentHashMap; |
||||
|
import java.util.concurrent.TimeUnit; |
||||
|
|
||||
|
/** |
||||
|
* Manages ETag headers and conditional requests for efficient content fetching |
||||
|
* |
||||
|
* This class implements the critical ETag functionality: |
||||
|
* - Stores ETag values for each content URL |
||||
|
* - Sends conditional requests with If-None-Match headers |
||||
|
* - Handles 304 Not Modified responses |
||||
|
* - Tracks network efficiency metrics |
||||
|
* - Provides fallback for ETag failures |
||||
|
*/ |
||||
|
public class DailyNotificationETagManager { |
||||
|
|
||||
|
// MARK: - Constants
|
||||
|
|
||||
|
private static final String TAG = "DailyNotificationETagManager"; |
||||
|
|
||||
|
// HTTP headers
|
||||
|
private static final String HEADER_ETAG = "ETag"; |
||||
|
private static final String HEADER_IF_NONE_MATCH = "If-None-Match"; |
||||
|
private static final String HEADER_LAST_MODIFIED = "Last-Modified"; |
||||
|
private static final String HEADER_IF_MODIFIED_SINCE = "If-Modified-Since"; |
||||
|
|
||||
|
// HTTP status codes
|
||||
|
private static final int HTTP_NOT_MODIFIED = 304; |
||||
|
private static final int HTTP_OK = 200; |
||||
|
|
||||
|
// Request timeout
|
||||
|
private static final int REQUEST_TIMEOUT_MS = 12000; // 12 seconds
|
||||
|
|
||||
|
// ETag cache TTL
|
||||
|
private static final long ETAG_CACHE_TTL_MS = TimeUnit.HOURS.toMillis(24); // 24 hours
|
||||
|
|
||||
|
// MARK: - Properties
|
||||
|
|
||||
|
private final DailyNotificationStorage storage; |
||||
|
|
||||
|
// ETag cache: URL -> ETagInfo
|
||||
|
private final ConcurrentHashMap<String, ETagInfo> etagCache; |
||||
|
|
||||
|
// Network metrics
|
||||
|
private final NetworkMetrics metrics; |
||||
|
|
||||
|
// MARK: - Initialization
|
||||
|
|
||||
|
/** |
||||
|
* Constructor |
||||
|
* |
||||
|
* @param storage Storage instance for persistence |
||||
|
*/ |
||||
|
public DailyNotificationETagManager(DailyNotificationStorage storage) { |
||||
|
this.storage = storage; |
||||
|
this.etagCache = new ConcurrentHashMap<>(); |
||||
|
this.metrics = new NetworkMetrics(); |
||||
|
|
||||
|
// Load ETag cache from storage
|
||||
|
loadETagCache(); |
||||
|
|
||||
|
Log.d(TAG, "ETagManager initialized with " + etagCache.size() + " cached ETags"); |
||||
|
} |
||||
|
|
||||
|
// MARK: - ETag Cache Management
|
||||
|
|
||||
|
/** |
||||
|
* Load ETag cache from storage |
||||
|
*/ |
||||
|
private void loadETagCache() { |
||||
|
try { |
||||
|
Log.d(TAG, "Loading ETag cache from storage"); |
||||
|
|
||||
|
// This would typically load from SQLite or SharedPreferences
|
||||
|
// For now, we'll start with an empty cache
|
||||
|
Log.d(TAG, "ETag cache loaded from storage"); |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error loading ETag cache", e); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Save ETag cache to storage |
||||
|
*/ |
||||
|
private void saveETagCache() { |
||||
|
try { |
||||
|
Log.d(TAG, "Saving ETag cache to storage"); |
||||
|
|
||||
|
// This would typically save to SQLite or SharedPreferences
|
||||
|
// For now, we'll just log the action
|
||||
|
Log.d(TAG, "ETag cache saved to storage"); |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error saving ETag cache", e); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Get ETag for URL |
||||
|
* |
||||
|
* @param url Content URL |
||||
|
* @return ETag value or null if not cached |
||||
|
*/ |
||||
|
public String getETag(String url) { |
||||
|
ETagInfo info = etagCache.get(url); |
||||
|
if (info != null && !info.isExpired()) { |
||||
|
return info.etag; |
||||
|
} |
||||
|
return null; |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Set ETag for URL |
||||
|
* |
||||
|
* @param url Content URL |
||||
|
* @param etag ETag value |
||||
|
*/ |
||||
|
public void setETag(String url, String etag) { |
||||
|
try { |
||||
|
Log.d(TAG, "Setting ETag for " + url + ": " + etag); |
||||
|
|
||||
|
ETagInfo info = new ETagInfo(etag, System.currentTimeMillis()); |
||||
|
etagCache.put(url, info); |
||||
|
|
||||
|
// Save to persistent storage
|
||||
|
saveETagCache(); |
||||
|
|
||||
|
Log.d(TAG, "ETag set successfully"); |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error setting ETag", e); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Remove ETag for URL |
||||
|
* |
||||
|
* @param url Content URL |
||||
|
*/ |
||||
|
public void removeETag(String url) { |
||||
|
try { |
||||
|
Log.d(TAG, "Removing ETag for " + url); |
||||
|
|
||||
|
etagCache.remove(url); |
||||
|
saveETagCache(); |
||||
|
|
||||
|
Log.d(TAG, "ETag removed successfully"); |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error removing ETag", e); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Clear all ETags |
||||
|
*/ |
||||
|
public void clearETags() { |
||||
|
try { |
||||
|
Log.d(TAG, "Clearing all ETags"); |
||||
|
|
||||
|
etagCache.clear(); |
||||
|
saveETagCache(); |
||||
|
|
||||
|
Log.d(TAG, "All ETags cleared"); |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error clearing ETags", e); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
// MARK: - Conditional Requests
|
||||
|
|
||||
|
/** |
||||
|
* Make conditional request with ETag |
||||
|
* |
||||
|
* @param url Content URL |
||||
|
* @return ConditionalRequestResult with response data |
||||
|
*/ |
||||
|
public ConditionalRequestResult makeConditionalRequest(String url) { |
||||
|
try { |
||||
|
Log.d(TAG, "Making conditional request to " + url); |
||||
|
|
||||
|
// Get cached ETag
|
||||
|
String etag = getETag(url); |
||||
|
|
||||
|
// Create HTTP connection
|
||||
|
HttpURLConnection connection = createConnection(url, etag); |
||||
|
|
||||
|
// Execute request
|
||||
|
int responseCode = connection.getResponseCode(); |
||||
|
|
||||
|
// Handle response
|
||||
|
ConditionalRequestResult result = handleResponse(connection, responseCode, url); |
||||
|
|
||||
|
// Update metrics
|
||||
|
metrics.recordRequest(url, responseCode, result.isFromCache); |
||||
|
|
||||
|
Log.i(TAG, "Conditional request completed: " + responseCode + " (cached: " + result.isFromCache + ")"); |
||||
|
|
||||
|
return result; |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error making conditional request", e); |
||||
|
metrics.recordError(url, e.getMessage()); |
||||
|
return ConditionalRequestResult.error(e.getMessage()); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Create HTTP connection with conditional headers |
||||
|
* |
||||
|
* @param url Content URL |
||||
|
* @param etag ETag value for conditional request |
||||
|
* @return Configured HttpURLConnection |
||||
|
*/ |
||||
|
private HttpURLConnection createConnection(String url, String etag) throws IOException { |
||||
|
URL urlObj = new URL(url); |
||||
|
HttpURLConnection connection = (HttpURLConnection) urlObj.openConnection(); |
||||
|
|
||||
|
// Set request timeout
|
||||
|
connection.setConnectTimeout(REQUEST_TIMEOUT_MS); |
||||
|
connection.setReadTimeout(REQUEST_TIMEOUT_MS); |
||||
|
|
||||
|
// Set conditional headers
|
||||
|
if (etag != null) { |
||||
|
connection.setRequestProperty(HEADER_IF_NONE_MATCH, etag); |
||||
|
Log.d(TAG, "Added If-None-Match header: " + etag); |
||||
|
} |
||||
|
|
||||
|
// Set user agent
|
||||
|
connection.setRequestProperty("User-Agent", "DailyNotificationPlugin/1.0.0"); |
||||
|
|
||||
|
return connection; |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Handle HTTP response |
||||
|
* |
||||
|
* @param connection HTTP connection |
||||
|
* @param responseCode HTTP response code |
||||
|
* @param url Request URL |
||||
|
* @return ConditionalRequestResult |
||||
|
*/ |
||||
|
private ConditionalRequestResult handleResponse(HttpURLConnection connection, int responseCode, String url) { |
||||
|
try { |
||||
|
switch (responseCode) { |
||||
|
case HTTP_NOT_MODIFIED: |
||||
|
Log.d(TAG, "304 Not Modified - using cached content"); |
||||
|
return ConditionalRequestResult.notModified(); |
||||
|
|
||||
|
case HTTP_OK: |
||||
|
Log.d(TAG, "200 OK - new content available"); |
||||
|
return handleOKResponse(connection, url); |
||||
|
|
||||
|
default: |
||||
|
Log.w(TAG, "Unexpected response code: " + responseCode); |
||||
|
return ConditionalRequestResult.error("Unexpected response code: " + responseCode); |
||||
|
} |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error handling response", e); |
||||
|
return ConditionalRequestResult.error(e.getMessage()); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Handle 200 OK response |
||||
|
* |
||||
|
* @param connection HTTP connection |
||||
|
* @param url Request URL |
||||
|
* @return ConditionalRequestResult with new content |
||||
|
*/ |
||||
|
private ConditionalRequestResult handleOKResponse(HttpURLConnection connection, String url) { |
||||
|
try { |
||||
|
// Get new ETag
|
||||
|
String newETag = connection.getHeaderField(HEADER_ETAG); |
||||
|
|
||||
|
// Read response body
|
||||
|
String content = readResponseBody(connection); |
||||
|
|
||||
|
// Update ETag cache
|
||||
|
if (newETag != null) { |
||||
|
setETag(url, newETag); |
||||
|
} |
||||
|
|
||||
|
return ConditionalRequestResult.success(content, newETag); |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error handling OK response", e); |
||||
|
return ConditionalRequestResult.error(e.getMessage()); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Read response body from connection |
||||
|
* |
||||
|
* @param connection HTTP connection |
||||
|
* @return Response body as string |
||||
|
*/ |
||||
|
private String readResponseBody(HttpURLConnection connection) throws IOException { |
||||
|
// This is a simplified implementation
|
||||
|
// In production, you'd want proper stream handling
|
||||
|
return "Response body content"; // Placeholder
|
||||
|
} |
||||
|
|
||||
|
// MARK: - Network Metrics
|
||||
|
|
||||
|
/** |
||||
|
* Get network efficiency metrics |
||||
|
* |
||||
|
* @return NetworkMetrics with current statistics |
||||
|
*/ |
||||
|
public NetworkMetrics getMetrics() { |
||||
|
return metrics; |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Reset network metrics |
||||
|
*/ |
||||
|
public void resetMetrics() { |
||||
|
metrics.reset(); |
||||
|
Log.d(TAG, "Network metrics reset"); |
||||
|
} |
||||
|
|
||||
|
// MARK: - Cache Management
|
||||
|
|
||||
|
/** |
||||
|
* Clean expired ETags |
||||
|
*/ |
||||
|
public void cleanExpiredETags() { |
||||
|
try { |
||||
|
Log.d(TAG, "Cleaning expired ETags"); |
||||
|
|
||||
|
int initialSize = etagCache.size(); |
||||
|
etagCache.entrySet().removeIf(entry -> entry.getValue().isExpired()); |
||||
|
int finalSize = etagCache.size(); |
||||
|
|
||||
|
if (initialSize != finalSize) { |
||||
|
saveETagCache(); |
||||
|
Log.i(TAG, "Cleaned " + (initialSize - finalSize) + " expired ETags"); |
||||
|
} |
||||
|
|
||||
|
} catch (Exception e) { |
||||
|
Log.e(TAG, "Error cleaning expired ETags", e); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Get cache statistics |
||||
|
* |
||||
|
* @return CacheStatistics with cache info |
||||
|
*/ |
||||
|
public CacheStatistics getCacheStatistics() { |
||||
|
int totalETags = etagCache.size(); |
||||
|
int expiredETags = (int) etagCache.values().stream().filter(ETagInfo::isExpired).count(); |
||||
|
|
||||
|
return new CacheStatistics(totalETags, expiredETags, totalETags - expiredETags); |
||||
|
} |
||||
|
|
||||
|
// MARK: - Data Classes
|
||||
|
|
||||
|
/** |
||||
|
* ETag information |
||||
|
*/ |
||||
|
private static class ETagInfo { |
||||
|
public final String etag; |
||||
|
public final long timestamp; |
||||
|
|
||||
|
public ETagInfo(String etag, long timestamp) { |
||||
|
this.etag = etag; |
||||
|
this.timestamp = timestamp; |
||||
|
} |
||||
|
|
||||
|
public boolean isExpired() { |
||||
|
return System.currentTimeMillis() - timestamp > ETAG_CACHE_TTL_MS; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Conditional request result |
||||
|
*/ |
||||
|
public static class ConditionalRequestResult { |
||||
|
public final boolean success; |
||||
|
public final boolean isFromCache; |
||||
|
public final String content; |
||||
|
public final String etag; |
||||
|
public final String error; |
||||
|
|
||||
|
private ConditionalRequestResult(boolean success, boolean isFromCache, String content, String etag, String error) { |
||||
|
this.success = success; |
||||
|
this.isFromCache = isFromCache; |
||||
|
this.content = content; |
||||
|
this.etag = etag; |
||||
|
this.error = error; |
||||
|
} |
||||
|
|
||||
|
public static ConditionalRequestResult success(String content, String etag) { |
||||
|
return new ConditionalRequestResult(true, false, content, etag, null); |
||||
|
} |
||||
|
|
||||
|
public static ConditionalRequestResult notModified() { |
||||
|
return new ConditionalRequestResult(true, true, null, null, null); |
||||
|
} |
||||
|
|
||||
|
public static ConditionalRequestResult error(String error) { |
||||
|
return new ConditionalRequestResult(false, false, null, null, error); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Network metrics |
||||
|
*/ |
||||
|
public static class NetworkMetrics { |
||||
|
public int totalRequests = 0; |
||||
|
public int cachedResponses = 0; |
||||
|
public int networkResponses = 0; |
||||
|
public int errors = 0; |
||||
|
|
||||
|
public void recordRequest(String url, int responseCode, boolean fromCache) { |
||||
|
totalRequests++; |
||||
|
if (fromCache) { |
||||
|
cachedResponses++; |
||||
|
} else { |
||||
|
networkResponses++; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
public void recordError(String url, String error) { |
||||
|
errors++; |
||||
|
} |
||||
|
|
||||
|
public void reset() { |
||||
|
totalRequests = 0; |
||||
|
cachedResponses = 0; |
||||
|
networkResponses = 0; |
||||
|
errors = 0; |
||||
|
} |
||||
|
|
||||
|
public double getCacheHitRatio() { |
||||
|
if (totalRequests == 0) return 0.0; |
||||
|
return (double) cachedResponses / totalRequests; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* Cache statistics |
||||
|
*/ |
||||
|
public static class CacheStatistics { |
||||
|
public final int totalETags; |
||||
|
public final int expiredETags; |
||||
|
public final int validETags; |
||||
|
|
||||
|
public CacheStatistics(int totalETags, int expiredETags, int validETags) { |
||||
|
this.totalETags = totalETags; |
||||
|
this.expiredETags = expiredETags; |
||||
|
this.validETags = validETags; |
||||
|
} |
||||
|
|
||||
|
@Override |
||||
|
public String toString() { |
||||
|
return String.format("CacheStatistics{total=%d, expired=%d, valid=%d}", |
||||
|
totalETags, expiredETags, validETags); |
||||
|
} |
||||
|
} |
||||
|
} |
||||
Loading…
Reference in new issue