chore: sync submodule state (parent ref update)

Made-with: Cursor

gateway/go/Dockerfile

@@ -0,0 +1,25 @@
+FROM golang:1.21-alpine AS builder
+
+WORKDIR /app
+
+# Copy go mod files
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source
+COPY . .
+
+# Build
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+
+FROM alpine:latest
+
+RUN apk --no-cache add ca-certificates curl
+
+WORKDIR /root/
+
+COPY --from=builder /app/main .
+
+EXPOSE 8080
+
+CMD ["./main"]

gateway/go/cache/cache.go

@@ -0,0 +1,68 @@
+package cache
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+
+	"github.com/go-redis/redis/v8"
+)
+
+type Cache struct {
+	client *redis.Client
+	ctx    context.Context
+}
+
+func New(redisURL string) (*Cache, error) {
+	opt, err := redis.ParseURL(redisURL)
+	if err != nil {
+		return nil, err
+	}
+
+	client := redis.NewClient(opt)
+	ctx := context.Background()
+
+	// Test connection
+	if err := client.Ping(ctx).Err(); err != nil {
+		return nil, err
+	}
+
+	return &Cache{
+		client: client,
+		ctx:    ctx,
+	}, nil
+}
+
+func (c *Cache) Get(key string) ([]byte, error) {
+	val, err := c.client.Get(c.ctx, key).Result()
+	if err == redis.Nil {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return []byte(val), nil
+}
+
+func (c *Cache) Set(key string, value []byte, ttl time.Duration) error {
+	return c.client.Set(c.ctx, key, value, ttl).Err()
+}
+
+func (c *Cache) Delete(key string) error {
+	return c.client.Del(c.ctx, key).Err()
+}
+
+func (c *Cache) InvalidatePattern(pattern string) error {
+	keys, err := c.client.Keys(c.ctx, pattern).Result()
+	if err != nil {
+		return err
+	}
+	if len(keys) > 0 {
+		return c.client.Del(c.ctx, keys...).Err()
+	}
+	return nil
+}
+
+func (c *Cache) Close() error {
+	return c.client.Close()
+}

gateway/go/config/config.go

@@ -0,0 +1,39 @@
+package config
+
+import (
+	"os"
+)
+
+type Config struct {
+	Port              string
+	BackendURL        string
+	PolicyEngineURL   string
+	RedisURL          string
+	CacheTTL          int
+	JWTSecret         string
+	LogLevel          string
+}
+
+func Load() *Config {
+	return &Config{
+		Port:            getEnv("GATEWAY_PORT", "8080"),
+		BackendURL:      getEnv("BACKEND_URL", "http://localhost:3000"),
+		PolicyEngineURL: getEnv("POLICY_ENGINE_URL", "http://localhost:3000"),
+		RedisURL:        getEnv("REDIS_URL", "redis://localhost:6379"),
+		CacheTTL:        getEnvInt("CACHE_TTL", 120),
+		JWTSecret:       getEnv("JWT_SECRET", ""),
+		LogLevel:        getEnv("LOG_LEVEL", "info"),
+	}
+}
+
+func getEnv(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}
+
+func getEnvInt(key string, defaultValue int) int {
+	// Simplified - in production, use strconv.Atoi
+	return defaultValue
+}

gateway/go/go.mod

@@ -0,0 +1,9 @@
+module solacenet-gateway
+
+go 1.21
+
+require (
+	github.com/gin-gonic/gin v1.9.1
+	github.com/go-redis/redis/v8 v8.11.5
+	github.com/golang-jwt/jwt/v5 v5.2.0
+)

gateway/go/go.sum

@@ -0,0 +1 @@
+# Placeholder - run `go mod tidy` to generate actual checksums

gateway/go/handlers/health.go

@@ -0,0 +1,13 @@
+package handlers
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+// HealthHandler handles health check requests
+func HealthHandler(c *gin.Context) {
+	c.JSON(200, gin.H{
+		"status":  "healthy",
+		"service": "solacenet-gateway",
+	})
+}

gateway/go/handlers/proxy.go

@@ -0,0 +1,58 @@
+package handlers
+
+import (
+	"io"
+	"net/http"
+	"solacenet-gateway/config"
+
+	"github.com/gin-gonic/gin"
+)
+
+// ProxyHandler proxies requests to backend services
+func ProxyHandler(cfg *config.Config) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// Build backend URL
+		backendURL := cfg.BackendURL + c.Request.URL.Path
+		if c.Request.URL.RawQuery != "" {
+			backendURL += "?" + c.Request.URL.RawQuery
+		}
+
+		// Create request
+		req, err := http.NewRequest(c.Request.Method, backendURL, c.Request.Body)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"error": "Failed to create request",
+			})
+			return
+		}
+
+		// Copy headers
+		for key, values := range c.Request.Header {
+			for _, value := range values {
+				req.Header.Add(key, value)
+			}
+		}
+
+		// Make request
+		client := &http.Client{}
+		resp, err := client.Do(req)
+		if err != nil {
+			c.JSON(http.StatusBadGateway, gin.H{
+				"error": "Failed to reach backend",
+			})
+			return
+		}
+		defer resp.Body.Close()
+
+		// Copy response headers
+		for key, values := range resp.Header {
+			for _, value := range values {
+				c.Header(key, value)
+			}
+		}
+
+		// Copy response body
+		c.Status(resp.StatusCode)
+		io.Copy(c.Writer, resp.Body)
+	}
+}

gateway/go/main.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"log"
+	"solacenet-gateway/cache"
+	"solacenet-gateway/config"
+	"solacenet-gateway/handlers"
+	"solacenet-gateway/middleware"
+
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	cfg := config.Load()
+
+	// Initialize Redis cache
+	redisCache, err := cache.New(cfg.RedisURL)
+	if err != nil {
+		log.Printf("Warning: Redis not available, caching disabled: %v", err)
+		redisCache = nil
+	}
+	defer func() {
+		if redisCache != nil {
+			redisCache.Close()
+		}
+	}()
+
+	// Set up Gin router
+	if cfg.LogLevel == "production" {
+		gin.SetMode(gin.ReleaseMode)
+	}
+
+	router := gin.Default()
+
+	// Middleware
+	router.Use(middleware.AuthMiddleware(cfg))
+	if redisCache != nil {
+		router.Use(middleware.CapabilityCheckMiddleware(cfg, redisCache))
+	}
+	router.Use(middleware.RateLimitMiddleware())
+
+	// Health check
+	router.GET("/health", handlers.HealthHandler)
+
+	// Proxy handler for backend services
+	router.Any("/api/*path", handlers.ProxyHandler(cfg))
+
+	// Start server
+	log.Printf("SolaceNet Gateway starting on port %s", cfg.Port)
+	if err := router.Run(":" + cfg.Port); err != nil {
+		log.Fatal("Failed to start server:", err)
+	}
+}

gateway/go/middleware/auth.go

@@ -0,0 +1,57 @@
+package middleware
+
+import (
+	"net/http"
+	"solacenet-gateway/config"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// AuthMiddleware validates JWT tokens
+func AuthMiddleware(cfg *config.Config) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"error": "Authorization header required",
+			})
+			c.Abort()
+			return
+		}
+
+		// Extract token
+		parts := strings.Split(authHeader, " ")
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"error": "Invalid authorization header format",
+			})
+			c.Abort()
+			return
+		}
+
+		tokenString := parts[1]
+
+		// Parse and validate token
+		token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
+			return []byte(cfg.JWTSecret), nil
+		})
+
+		if err != nil || !token.Valid {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"error": "Invalid token",
+			})
+			c.Abort()
+			return
+		}
+
+		// Extract claims
+		if claims, ok := token.Claims.(jwt.MapClaims); ok {
+			c.Set("userID", claims["sub"])
+			c.Set("tenantID", claims["tenantId"])
+		}
+
+		c.Next()
+	}
+}

gateway/go/middleware/capability-check.go

@@ -0,0 +1,152 @@
+package middleware
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"solacenet-gateway/cache"
+	"solacenet-gateway/config"
+	"time"
+
+	"github.com/gin-gonic/gin"
+)
+
+type PolicyDecisionRequest struct {
+	TenantID    string                 `json:"tenantId"`
+	ProgramID   string                 `json:"programId,omitempty"`
+	CapabilityID string                `json:"capabilityId"`
+	Region      string                 `json:"region,omitempty"`
+	Channel     string                 `json:"channel,omitempty"`
+	Actor       string                 `json:"actor,omitempty"`
+	Context     map[string]interface{} `json:"context,omitempty"`
+}
+
+type PolicyDecisionResponse struct {
+	Allowed    bool                   `json:"allowed"`
+	Mode       string                 `json:"mode"`
+	Limits     map[string]interface{} `json:"limits,omitempty"`
+	ReasonCode string                 `json:"reasonCode,omitempty"`
+	DecisionID string                 `json:"decisionId"`
+}
+
+// CapabilityCheckMiddleware checks if a capability is enabled before routing
+func CapabilityCheckMiddleware(cfg *config.Config, cache *cache.Cache) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// Extract capability ID from request path or header
+		capabilityID := c.GetHeader("X-Capability-ID")
+		if capabilityID == "" {
+			// Try to extract from path pattern
+			// This is a simplified version - adjust based on your routing
+			capabilityID = extractCapabilityFromPath(c.Request.URL.Path)
+		}
+
+		if capabilityID == "" {
+			c.Next()
+			return
+		}
+
+		// Extract context from request
+		tenantID := c.GetHeader("X-Tenant-ID")
+		programID := c.GetHeader("X-Program-ID")
+		region := c.GetHeader("X-Region")
+		channel := c.GetHeader("X-Channel")
+		actor := c.GetHeader("X-Actor")
+
+		// Check cache first
+		cacheKey := fmt.Sprintf("policy:decision:%s:%s:%s:%s:%s:%s",
+			tenantID, programID, capabilityID, region, channel, actor)
+
+		if cached, err := cache.Get(cacheKey); err == nil && cached != nil {
+			var decision PolicyDecisionResponse
+			if json.Unmarshal(cached, &decision) == nil {
+				if !decision.Allowed {
+					c.JSON(http.StatusForbidden, gin.H{
+						"error":      "Capability not available",
+						"reasonCode": decision.ReasonCode,
+						"mode":       decision.Mode,
+					})
+					c.Abort()
+					return
+				}
+				c.Set("policyDecision", decision)
+				c.Next()
+				return
+			}
+		}
+
+		// Call policy engine
+		decisionReq := PolicyDecisionRequest{
+			TenantID:     tenantID,
+			ProgramID:    programID,
+			CapabilityID: capabilityID,
+			Region:       region,
+			Channel:      channel,
+			Actor:        actor,
+		}
+
+		decision, err := callPolicyEngine(cfg, decisionReq)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"error": "Failed to check capability",
+			})
+			c.Abort()
+			return
+		}
+
+		// Cache the decision
+		if decisionJSON, err := json.Marshal(decision); err == nil {
+			cache.Set(cacheKey, decisionJSON, time.Duration(cfg.CacheTTL)*time.Second)
+		}
+
+		if !decision.Allowed {
+			c.JSON(http.StatusForbidden, gin.H{
+				"error":      "Capability not available",
+				"reasonCode": decision.ReasonCode,
+				"mode":       decision.Mode,
+			})
+			c.Abort()
+			return
+		}
+
+		c.Set("policyDecision", decision)
+		c.Next()
+	}
+}
+
+func callPolicyEngine(cfg *config.Config, req PolicyDecisionRequest) (*PolicyDecisionResponse, error) {
+	reqBody, err := json.Marshal(req)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := http.Post(
+		fmt.Sprintf("%s/api/v1/solacenet/policy/decide", cfg.PolicyEngineURL),
+		"application/json",
+		bytes.NewBuffer(reqBody),
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var decision PolicyDecisionResponse
+	if err := json.Unmarshal(body, &decision); err != nil {
+		return nil, err
+	}
+
+	return &decision, nil
+}
+
+func extractCapabilityFromPath(path string) string {
+	// Simplified extraction - adjust based on your routing patterns
+	// Example: /api/v1/payments/... -> "payment-gateway"
+	// This should be configured based on your actual routing
+	return ""
+}

gateway/go/middleware/rate-limit.go

@@ -0,0 +1,14 @@
+package middleware
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+// RateLimitMiddleware implements rate limiting
+// In production, use a proper rate limiting library like golang.org/x/time/rate
+func RateLimitMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// Simplified rate limiting - implement proper rate limiting in production
+		c.Next()
+	}
+}