Enhanced: Comprehensive production debugging and Nginx proxy support
Debugging Tools: - Added /debug endpoint to verify deployment and test distribution functionality - Added browser console test function: testDistributionChart() - Enhanced SocketIO settings with better transport priorities - Added comprehensive error tracking and status reporting Nginx Configuration: - Created NGINX_CONFIG.md with complete proxy setup guide - Improved WebSocket transport settings and timeouts - Better ping/pong settings for connection stability Production Compatibility: - Optimized SocketIO for proxy environments - Enhanced fallback mechanisms - Production-ready logging and error handling This should resolve proxy-related issues and provide clear diagnostic tools.
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NGINX_CONFIG.md
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88
NGINX_CONFIG.md
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# Nginx Configuration for Flask-SocketIO with WebSocket Support
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This document provides the required Nginx configuration to properly proxy WebSocket connections for the Markov Economics application.
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## Required Nginx Configuration
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```nginx
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server {
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listen 80;
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server_name markov.elpatron.me;
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# Optional: Redirect HTTP to HTTPS
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return 301 https://$server_name$request_uri;
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}
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server {
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listen 443 ssl http2;
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server_name markov.elpatron.me;
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# SSL configuration (adjust paths as needed)
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ssl_certificate /path/to/cert.pem;
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ssl_certificate_key /path/to/private.key;
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# WebSocket proxy settings
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location /socket.io/ {
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proxy_pass http://127.0.0.1:5000;
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proxy_http_version 1.1;
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection "upgrade";
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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# WebSocket specific timeouts
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proxy_read_timeout 86400;
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proxy_send_timeout 86400;
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proxy_connect_timeout 60;
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# Disable buffering for real-time communication
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proxy_buffering off;
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proxy_cache off;
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}
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# Regular HTTP traffic
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location / {
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proxy_pass http://127.0.0.1:5000;
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto $scheme;
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# Standard timeouts
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proxy_read_timeout 30;
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proxy_send_timeout 30;
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proxy_connect_timeout 10;
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}
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}
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```
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## Critical Configuration Points
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1. **WebSocket Upgrade Headers**: The `Upgrade` and `Connection` headers are essential for WebSocket handshake
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2. **HTTP Version**: Must use HTTP/1.1 for WebSocket support
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3. **Extended Timeouts**: WebSocket connections need longer timeouts than regular HTTP
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4. **Disable Buffering**: Real-time communication requires immediate data flow
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5. **Separate Location Blocks**: Socket.IO traffic should be handled separately from regular HTTP traffic
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## Testing the Configuration
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After applying the configuration:
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1. Restart Nginx: `sudo nginx -t && sudo systemctl reload nginx`
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2. Check browser console for connection messages
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3. Test the debug endpoint: https://markov.elpatron.me/debug
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4. Run the distribution test: Open browser console and type `testDistributionChart()`
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## Troubleshooting
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If WebSocket connections still fail:
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- Check Nginx error logs: `sudo tail -f /var/log/nginx/error.log`
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- Verify the application is accessible directly: `curl http://127.0.0.1:5000/health`
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- Test WebSocket connection manually with tools like `wscat`
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- Ensure firewall allows WebSocket traffic
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## Alternative: Fallback to Polling Only
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If WebSocket cannot be made to work, the application will automatically fall back to HTTP polling, which should work with any standard HTTP proxy configuration.
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@@ -15,8 +15,13 @@ from app.models import SimulationManager
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socketio = SocketIO(
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cors_allowed_origins="*",
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async_mode='threading',
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logger=True,
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engineio_logger=True
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logger=False, # Disable to avoid log spam in production
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engineio_logger=False,
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# Transport order: try websocket first, then polling
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transports=['websocket', 'polling'],
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# Ping settings for better connection detection
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ping_timeout=60,
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ping_interval=25
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)
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# Global simulation manager instance
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@@ -45,7 +50,9 @@ def create_app(config_name=None):
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async_mode='threading',
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cors_allowed_origins="*",
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allow_upgrades=True,
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transports=['websocket', 'polling']
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transports=['websocket', 'polling'],
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ping_timeout=60,
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ping_interval=25
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)
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# Register blueprints
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@@ -101,6 +101,59 @@ def results(simulation_id):
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title=f"Results - Simulation {simulation_id[:8]}")
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@main_bp.route('/debug')
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def debug_info():
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"""
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Debug endpoint to verify deployment and test functionality.
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Returns:
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JSON response with debug information
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"""
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import os
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from datetime import datetime
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from app.models.economic_model import EconomicSimulation, SimulationParameters
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# Test distribution functionality
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test_params = SimulationParameters(
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r_rate=0.05,
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g_rate=0.03,
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initial_capital=1000,
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initial_consumption=1000,
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num_agents=10,
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iterations=5
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)
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test_sim = EconomicSimulation(test_params)
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# Run a few steps
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for _ in range(5):
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test_sim.step()
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# Get distribution data
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labels, counts = test_sim.get_wealth_histogram(5)
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debug_data = {
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'timestamp': datetime.now().isoformat(),
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'environment': os.getenv('FLASK_ENV', 'unknown'),
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'config': os.getenv('FLASK_CONFIG', 'unknown'),
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'python_version': os.sys.version,
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'distribution_test': {
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'labels': labels,
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'counts': counts,
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'total_agents': len(test_sim.agents),
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'snapshots': len(test_sim.snapshots)
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},
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'fixes_deployed': {
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'fallback_polling': True,
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'enhanced_socketio': True,
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'production_debug': True,
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'environment_fix': True
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},
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'version_info': 'v2.1-proxy-fixes'
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}
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return jsonify(debug_data)
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@main_bp.route('/health')
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def health_check():
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"""
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@@ -1,3 +1,63 @@
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/**
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* Production debugging test function
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* Call from browser console: testDistributionChart()
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*/
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window.testDistributionChart = function() {
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debugLog('=== DISTRIBUTION CHART DIAGNOSTIC TEST ===');
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// Test 1: Check if elements exist
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const canvas = document.getElementById('distributionChart');
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debugLog('Canvas element found', !!canvas);
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// Test 2: Check Chart.js availability
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debugLog('Chart.js available', typeof Chart !== 'undefined');
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// Test 3: Check chart instance
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debugLog('Chart instance exists', !!charts.distribution);
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// Test 4: Check current data
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debugLog('Current simulation data', {
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hasId: !!currentSimulation.id,
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isRunning: currentSimulation.isRunning,
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distributionData: currentSimulation.data.distribution
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});
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// Test 5: Check WebSocket connection
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debugLog('WebSocket status', {
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socketExists: !!window.MarkovEconomics.socket,
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isConnected: window.MarkovEconomics ? window.MarkovEconomics.isConnected : 'unknown'
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});
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// Test 6: Manually test API endpoint
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if (currentSimulation.id) {
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fetch(`/api/simulation/${currentSimulation.id}/distribution?bins=5`)
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.then(response => response.json())
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.then(data => {
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debugLog('Manual API test result', data);
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})
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.catch(error => {
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debugLog('Manual API test failed', error);
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});
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}
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// Test 7: Try to create test data and update chart
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if (charts.distribution) {
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const testLabels = ['$0-100', '$100-200', '$200-300'];
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const testCounts = [5, 8, 2];
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try {
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charts.distribution.data.labels = testLabels;
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charts.distribution.data.datasets[0].data = testCounts;
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charts.distribution.update();
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debugLog('Manual chart update test: SUCCESS');
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} catch (error) {
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debugLog('Manual chart update test: FAILED', error);
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}
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}
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debugLog('=== TEST COMPLETE ===');
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};
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// Debug flag - can be enabled even in production for troubleshooting
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const DEBUG_DISTRIBUTION = true;
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