Proof of Caching now tests BOTH HTTP and HTTPS separately

Changes:
- Clears cache before each test using varnishadm ban
- Tests HTTP (port 80): Shows MISS → HIT pattern
- Tests HTTPS (port 443): Shows MISS → HIT pattern
- Displays X-Cache, X-Served-By, and X-Cache-Hits for each request
- Separate confirmation for each protocol
- Final verdict confirms both protocols are cached by Varnish
- Shows complete traffic flow architecture

Proves without doubt that both HTTP and HTTPS route through Varnish and cache properly.

modules/performance/nginx-varnish-manager.sh

@@ -721,9 +721,10 @@ test_domain() {
 
 # Quick proof that caching is actually working
 proof_of_caching() {
-    print_banner "Proof of Caching Test"
+    print_banner "Proof of Caching Test - HTTP & HTTPS"
 
-    echo "This test proves caching is working by showing MISS → HIT pattern"
+    echo "This test proves BOTH HTTP and HTTPS are cached by Varnish"
+    echo "Testing pattern: MISS → HIT (proves caching is working)"
     echo ""
 
     # Get first domain
@@ -740,79 +741,152 @@ proof_of_caching() {
     local server_ip=$(hostname -I | awk '{print $1}')
 
     echo "Testing domain: $domain"
-    echo "Server IP: $server_ip (testing direct to bypass CDN)"
+    echo "Server IP: $server_ip (bypassing CDN for accurate results)"
     echo ""
-
-    # Test common static files
-    local test_files=(
-        "/robots.txt"
-        "/favicon.ico"
-        "/"
-    )
-
-    local cache_working=0
-
-    for test_path in "${test_files[@]}"; do
-        local url="http://${domain}${test_path}"
-
-        echo "Testing: $test_path"
-
-        # First request - should be MISS
-        # Use --resolve to bypass CDN and test directly to server
-        local first_request=$(curl -s -I --max-time 5 --resolve "${domain}:80:${server_ip}" "$url" 2>/dev/null)
-        local first_cache=$(echo "$first_request" | grep -i "X-Cache:" | awk '{print $2}' | tr -d '\r')
-
-        # Second request - should be HIT
-        sleep 0.5
-        local second_request=$(curl -s -I --max-time 5 --resolve "${domain}:80:${server_ip}" "$url" 2>/dev/null)
-        local second_cache=$(echo "$second_request" | grep -i "X-Cache:" | awk '{print $2}' | tr -d '\r')
-
-        # Check if we got valid responses
-        if [ -z "$first_cache" ] || [ -z "$second_cache" ]; then
-            echo "  Status: Skipped (no cache headers)"
-            echo ""
-            continue
-        fi
-
-        # Display results
-        echo "  Request 1: X-Cache: $first_cache"
-        echo "  Request 2: X-Cache: $second_cache"
-
-        # Check if caching worked
-        if [ "$first_cache" = "MISS" ] && [ "$second_cache" = "HIT" ]; then
-            print_success "  ✓ CACHING WORKS! (MISS → HIT)"
-            cache_working=1
-        elif [ "$second_cache" = "HIT" ]; then
-            print_success "  ✓ Cache HIT detected"
-            cache_working=1
-        elif [ "$first_cache" = "MISS" ] && [ "$second_cache" = "MISS" ]; then
-            print_warning "  ⚠ No caching (both MISS) - may be dynamic content"
-        else
-            print_info "  ℹ Status: $first_cache → $second_cache"
-        fi
-
-        echo ""
-    done
-
     echo "════════════════════════════════════════════════════════════"
 
-    if [ "$cache_working" -eq 1 ]; then
+    local http_cache_working=0
+    local https_cache_working=0
+
+    # Test file that's most likely to be cacheable
+    local test_file="/robots.txt"
+
+    # ============================================================================
+    # TEST 1: HTTP (Port 80)
+    # ============================================================================
     echo ""
-        print_success "✓ PROOF CONFIRMED: Varnish is caching your sites!"
+    print_info "TEST 1: HTTP Protocol (Port 80)"
+    echo "────────────────────────────────────────────────────────────"
+
+    # Clear this specific URL from cache first
+    varnishadm "ban req.url ~ ${test_file}" >/dev/null 2>&1
+
+    sleep 1
+
+    echo "Testing: http://${domain}${test_file}"
     echo ""
-        echo "What this means:"
+
-        echo "  • Static files are being cached by Varnish"
+    # First HTTP request - should be MISS
-        echo "  • Repeat visitors get instant responses from cache"
+    local http_req1=$(curl -s -I --max-time 5 --resolve "${domain}:80:${server_ip}" "http://${domain}${test_file}" 2>/dev/null)
-        echo "  • Server load is reduced for cached content"
+    local http_cache1=$(echo "$http_req1" | grep -i "X-Cache:" | awk '{print $2}' | tr -d '\r')
+    local http_served1=$(echo "$http_req1" | grep -i "X-Served-By:" | awk '{print $2}' | tr -d '\r')
+
+    echo "  Request 1:"
+    echo "    X-Cache: ${http_cache1:-NOT FOUND}"
+    echo "    X-Served-By: ${http_served1:-NOT FOUND}"
+
+    # Second HTTP request - should be HIT
+    sleep 1
+    local http_req2=$(curl -s -I --max-time 5 --resolve "${domain}:80:${server_ip}" "http://${domain}${test_file}" 2>/dev/null)
+    local http_cache2=$(echo "$http_req2" | grep -i "X-Cache:" | awk '{print $2}' | tr -d '\r')
+    local http_served2=$(echo "$http_req2" | grep -i "X-Served-By:" | awk '{print $2}' | tr -d '\r')
+    local http_hits=$(echo "$http_req2" | grep -i "X-Cache-Hits:" | awk '{print $2}' | tr -d '\r')
+
+    echo "  Request 2:"
+    echo "    X-Cache: ${http_cache2:-NOT FOUND}"
+    echo "    X-Served-By: ${http_served2:-NOT FOUND}"
+    if [ -n "$http_hits" ]; then
+        echo "    X-Cache-Hits: $http_hits"
+    fi
+    echo ""
+
+    # Evaluate HTTP caching
+    if [ "$http_cache1" = "MISS" ] && [ "$http_cache2" = "HIT" ] && [ "$http_served2" = "Varnish" ]; then
+        print_success "✓ HTTP CACHING CONFIRMED: MISS → HIT via Varnish"
+        http_cache_working=1
+    elif [ "$http_cache2" = "HIT" ] && [ "$http_served2" = "Varnish" ]; then
+        print_success "✓ HTTP via Varnish (cache already populated)"
+        http_cache_working=1
+    else
+        print_error "✗ HTTP caching not detected"
+    fi
+
+    # ============================================================================
+    # TEST 2: HTTPS (Port 443)
+    # ============================================================================
+    echo ""
+    print_info "TEST 2: HTTPS Protocol (Port 443)"
+    echo "────────────────────────────────────────────────────────────"
+
+    # Clear cache again
+    varnishadm "ban req.url ~ ${test_file}" >/dev/null 2>&1
+
+    sleep 1
+
+    echo "Testing: https://${domain}${test_file}"
+    echo ""
+
+    # First HTTPS request - should be MISS
+    local https_req1=$(curl -sk -I --max-time 5 --resolve "${domain}:443:${server_ip}" "https://${domain}${test_file}" 2>/dev/null)
+    local https_cache1=$(echo "$https_req1" | grep -i "X-Cache:" | awk '{print $2}' | tr -d '\r')
+    local https_served1=$(echo "$https_req1" | grep -i "X-Served-By:" | awk '{print $2}' | tr -d '\r')
+
+    echo "  Request 1:"
+    echo "    X-Cache: ${https_cache1:-NOT FOUND}"
+    echo "    X-Served-By: ${https_served1:-NOT FOUND}"
+
+    # Second HTTPS request - should be HIT
+    sleep 1
+    local https_req2=$(curl -sk -I --max-time 5 --resolve "${domain}:443:${server_ip}" "https://${domain}${test_file}" 2>/dev/null)
+    local https_cache2=$(echo "$https_req2" | grep -i "X-Cache:" | awk '{print $2}' | tr -d '\r')
+    local https_served2=$(echo "$https_req2" | grep -i "X-Served-By:" | awk '{print $2}' | tr -d '\r')
+    local https_hits=$(echo "$https_req2" | grep -i "X-Cache-Hits:" | awk '{print $2}' | tr -d '\r')
+
+    echo "  Request 2:"
+    echo "    X-Cache: ${https_cache2:-NOT FOUND}"
+    echo "    X-Served-By: ${https_served2:-NOT FOUND}"
+    if [ -n "$https_hits" ]; then
+        echo "    X-Cache-Hits: $https_hits"
+    fi
+    echo ""
+
+    # Evaluate HTTPS caching
+    if [ "$https_cache1" = "MISS" ] && [ "$https_cache2" = "HIT" ] && [ "$https_served2" = "Varnish" ]; then
+        print_success "✓ HTTPS CACHING CONFIRMED: MISS → HIT via Varnish"
+        https_cache_working=1
+    elif [ "$https_cache2" = "HIT" ] && [ "$https_served2" = "Varnish" ]; then
+        print_success "✓ HTTPS via Varnish (cache already populated)"
+        https_cache_working=1
+    else
+        print_error "✗ HTTPS caching not detected"
+    fi
+
+    # ============================================================================
+    # FINAL VERDICT
+    # ============================================================================
+    echo ""
+    echo "════════════════════════════════════════════════════════════"
+    echo ""
+
+    if [ "$http_cache_working" -eq 1 ] && [ "$https_cache_working" -eq 1 ]; then
+        print_success "🎉 PROOF COMPLETE: Both HTTP and HTTPS are cached by Varnish!"
+        echo ""
+        echo "Traffic Flow Confirmed:"
+        echo "  HTTP:  Client → Nginx:80 → Varnish:6081 → Apache:81"
+        echo "  HTTPS: Client → Nginx:443 (SSL) → Varnish:6081 (HTTP) → Apache:81"
+        echo ""
+        echo "Benefits:"
+        echo "  ✓ Static content cached for both protocols"
+        echo "  ✓ Reduced server load and faster response times"
+        echo "  ✓ SSL termination at Nginx, HTTP backends to Varnish"
+        echo ""
+    elif [ "$http_cache_working" -eq 1 ]; then
+        print_warning "⚠ Partial Success: HTTP caching works, but HTTPS may have issues"
+        echo ""
+        echo "Try running 'Auto-Fix Issues' (option 4) to resolve HTTPS caching"
+        echo ""
+    elif [ "$https_cache_working" -eq 1 ]; then
+        print_warning "⚠ Partial Success: HTTPS caching works, but HTTP may have issues"
+        echo ""
+        echo "Try running 'Auto-Fix Issues' (option 4) to resolve HTTP caching"
         echo ""
     else
+        print_error "✗ Could not confirm caching for either protocol"
         echo ""
-        print_warning "⚠ Could not confirm caching"
+        echo "Troubleshooting:"
-        echo ""
+        echo "  1. Run 'Health Check' (option 3) to diagnose issues"
-        echo "Possible reasons:"
+        echo "  2. Run 'Auto-Fix Issues' (option 4) to repair configuration"
-        echo "  • Tested URLs are dynamic (admin pages, etc.)"
+        echo "  3. Check that Varnish service is running: systemctl status varnish"
-        echo "  • Cache was already populated (no MISS seen)"
-        echo "  • Try option 7 to clear cache, then test again"
         echo ""
     fi