Initial commit: breakpilot-compliance - Compliance SDK Platform

Services: Admin-Compliance, Backend-Compliance,
AI-Compliance-SDK, Consent-SDK, Developer-Portal,
PCA-Platform, DSMS

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

breakpilot-compliance-sdk/services/api-gateway/internal/middleware/middleware.go

@@ -0,0 +1,119 @@
+// Package middleware provides HTTP middleware for the API Gateway
+package middleware
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.uber.org/zap"
+	"golang.org/x/time/rate"
+)
+
+// Logger middleware logs requests
+func Logger(logger *zap.Logger) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		start := time.Now()
+		path := c.Request.URL.Path
+		raw := c.Request.URL.RawQuery
+
+		// Process request
+		c.Next()
+
+		// Log after request
+		latency := time.Since(start)
+		clientIP := c.ClientIP()
+		method := c.Request.Method
+		statusCode := c.Writer.Status()
+
+		if raw != "" {
+			path = path + "?" + raw
+		}
+
+		logger.Info("request",
+			zap.String("method", method),
+			zap.String("path", path),
+			zap.Int("status", statusCode),
+			zap.String("ip", clientIP),
+			zap.Duration("latency", latency),
+			zap.String("request_id", c.GetString("request_id")),
+		)
+	}
+}
+
+// CORS middleware handles Cross-Origin Resource Sharing
+func CORS() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		origin := c.GetHeader("Origin")
+		if origin == "" {
+			origin = "*"
+		}
+
+		c.Header("Access-Control-Allow-Origin", origin)
+		c.Header("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS")
+		c.Header("Access-Control-Allow-Headers", "Origin, Content-Type, Accept, Authorization, X-Tenant-ID, X-Request-ID")
+		c.Header("Access-Control-Allow-Credentials", "true")
+		c.Header("Access-Control-Max-Age", "86400")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+
+		c.Next()
+	}
+}
+
+// RequestID middleware adds a unique request ID to each request
+func RequestID() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		requestID := c.GetHeader("X-Request-ID")
+		if requestID == "" {
+			requestID = uuid.New().String()
+		}
+
+		c.Set("request_id", requestID)
+		c.Header("X-Request-ID", requestID)
+
+		c.Next()
+	}
+}
+
+// RateLimitConfig holds rate limiting configuration
+type RateLimitConfig struct {
+	RequestsPerSecond int
+	Burst             int
+}
+
+// RateLimiter middleware limits request rate per client
+func RateLimiter(config RateLimitConfig) gin.HandlerFunc {
+	// In production, use a distributed rate limiter with Redis
+	// This is a simple in-memory rate limiter per IP
+	limiters := make(map[string]*rate.Limiter)
+
+	return func(c *gin.Context) {
+		clientIP := c.ClientIP()
+
+		limiter, exists := limiters[clientIP]
+		if !exists {
+			limiter = rate.NewLimiter(rate.Limit(config.RequestsPerSecond), config.Burst)
+			limiters[clientIP] = limiter
+		}
+
+		if !limiter.Allow() {
+			c.AbortWithStatusJSON(http.StatusTooManyRequests, gin.H{
+				"error":       "Rate limit exceeded",
+				"retry_after": "1s",
+			})
+			return
+		}
+
+		c.Next()
+	}
+}
+
+// Recovery middleware recovers from panics
+func Recovery() gin.HandlerFunc {
+	return gin.Recovery()
+}