From eeb784bb9295cd59215c3ebae8f51b05f82c041b Mon Sep 17 00:00:00 2001 From: oabrivard Date: Mon, 9 Feb 2026 11:45:10 +0100 Subject: [PATCH] Finished task '3.1 API Gateway Service (Port 8086)' --- Makefile | 10 +- backend/services/admin-service/go.sum | 15 ++ backend/services/game-session-service/go.sum | 86 +++++++ backend/services/gateway-service/cmd/main.go | 189 ++++++++++++++- backend/services/gateway-service/go.mod | 44 +++- backend/services/gateway-service/go.sum | 120 ++++++++++ .../internal/infra/config/config.go | 195 ++++++++++++++++ .../internal/infra/proxy/reverse_proxy.go | 203 ++++++++++++++++ .../internal/infra/routing/upstreams.go | 41 ++++ .../interfaces/http/middleware/cors.go | 65 ++++++ .../interfaces/http/middleware/rate_limit.go | 218 ++++++++++++++++++ .../http/middleware/request_context.go | 57 +++++ .../http/middleware/security_headers.go | 49 ++++ .../internal/interfaces/http/routes.go | 84 +++++++ .../tests/integration_http_test.go | 194 ++++++++++++++++ backend/services/leaderboard-service/go.sum | 86 +++++++ backend/services/user-service/go.sum | 79 +++++++ infrastructure/dev/docker-compose.yml | 46 ++++ infrastructure/dev/nginx/conf.d/default.conf | 29 +++ infrastructure/dev/nginx/nginx.conf | 27 +++ 20 files changed, 1826 insertions(+), 11 deletions(-) create mode 100644 backend/services/gateway-service/internal/infra/config/config.go create mode 100644 backend/services/gateway-service/internal/infra/proxy/reverse_proxy.go create mode 100644 backend/services/gateway-service/internal/infra/routing/upstreams.go create mode 100644 backend/services/gateway-service/internal/interfaces/http/middleware/cors.go create mode 100644 backend/services/gateway-service/internal/interfaces/http/middleware/rate_limit.go create mode 100644 backend/services/gateway-service/internal/interfaces/http/middleware/request_context.go create mode 100644 backend/services/gateway-service/internal/interfaces/http/middleware/security_headers.go create mode 100644 backend/services/gateway-service/internal/interfaces/http/routes.go create mode 100644 backend/services/gateway-service/tests/integration_http_test.go create mode 100644 infrastructure/dev/nginx/conf.d/default.conf create mode 100644 infrastructure/dev/nginx/nginx.conf diff --git a/Makefile b/Makefile index cd8a1fc..03b1e65 100644 --- a/Makefile +++ b/Makefile @@ -23,7 +23,7 @@ ZITADEL_ADMIN_USERNAME ?= admin ZITADEL_ADMIN_PASSWORD ?= AdminPassword123! GRAFANA_ADMIN_USER ?= admin -.PHONY: help dev dev-full dev-auth stop clean \ +.PHONY: help dev dev-full dev-auth dev-gateway stop clean \ backend-lint backend-test backend-build \ frontend-dev frontend-lint frontend-test frontend-build \ db-up db-down db-logs db-shell redis-shell \ @@ -37,6 +37,7 @@ help: @echo " make dev - Start core infrastructure (PostgreSQL, Redis)" @echo " make dev-full - Start core infrastructure + observability" @echo " make dev-auth - Start core infrastructure + Zitadel auth" + @echo " make dev-gateway - Start core infrastructure + gateway ingress (NGINX + gateway service)" @echo " make stop - Stop all containers" @echo " make clean - Stop containers and remove volumes" @echo "" @@ -93,6 +94,13 @@ dev-auth: dev @echo "Zitadel ready at http://localhost:$(ZITADEL_PORT)" @echo "Admin credentials: $(ZITADEL_ADMIN_USERNAME) / $(ZITADEL_ADMIN_PASSWORD)" +dev-gateway: dev + @echo "Starting gateway ingress stack..." + @$(COMPOSE_CMD) --profile gateway up -d gateway-service nginx + @echo "" + @echo "Gateway ingress ready:" + @echo " Public entrypoint (NGINX): http://localhost:$(GATEWAY_PORT)" + stop: @echo "Stopping all containers..." @$(COMPOSE_CMD) down diff --git a/backend/services/admin-service/go.sum b/backend/services/admin-service/go.sum index 5763b68..44fbc1b 100644 --- a/backend/services/admin-service/go.sum +++ b/backend/services/admin-service/go.sum @@ -1,18 +1,33 @@ github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M= +github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/gofiber/fiber/v3 v3.0.0-beta.3 h1:7Q2I+HsIqnIEEDB+9oe7Gadpakh6ZLhXpTYz/L20vrg= +github.com/gofiber/fiber/v3 v3.0.0-beta.3/go.mod h1:kcMur0Dxqk91R7p4vxEpJfDWZ9u5IfvrtQc8Bvv/JmY= github.com/gofiber/utils/v2 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h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/backend/services/gateway-service/cmd/main.go b/backend/services/gateway-service/cmd/main.go index 0d48066..6baed0f 100644 --- a/backend/services/gateway-service/cmd/main.go +++ b/backend/services/gateway-service/cmd/main.go @@ -1,22 +1,197 @@ package main import ( + "context" + "fmt" "log" + "net/http" + "strings" + "time" + "github.com/gofiber/fiber/v3" + "github.com/gofiber/fiber/v3/middleware/adaptor" + redisv9 "github.com/redis/go-redis/v9" + + gconfig "knowfoolery/backend/services/gateway-service/internal/infra/config" + "knowfoolery/backend/services/gateway-service/internal/infra/proxy" + httpapi "knowfoolery/backend/services/gateway-service/internal/interfaces/http" + "knowfoolery/backend/services/gateway-service/internal/interfaces/http/middleware" + "knowfoolery/backend/shared/infra/auth/zitadel" + "knowfoolery/backend/shared/infra/observability/logging" + sharedmetrics "knowfoolery/backend/shared/infra/observability/metrics" + "knowfoolery/backend/shared/infra/observability/tracing" "knowfoolery/backend/shared/infra/utils/serviceboot" ) func main() { - cfg := serviceboot.Config{ - AppName: "Know Foolery - Gateway Service", + cfg := gconfig.FromEnv() + + logger := logging.NewLogger(cfg.Logging) + if err := cfg.Upstreams.Validate(); err != nil { + logger.WithError(err).Fatal("invalid gateway upstream configuration") + } + + sharedmetrics.NewMetrics(cfg.Metrics) + + tracer, err := tracing.NewTracer(cfg.Tracing) + if err != nil { + logger.Fatal("failed to initialize tracer") + } + defer func() { + _ = tracer.Shutdown(context.Background()) + }() + + redisClient := initRedis(cfg, logger) + if redisClient != nil { + defer func() { _ = redisClient.Close() }() + } + + bootCfg := serviceboot.Config{ + AppName: cfg.AppName, ServiceSlug: "gateway", - PortEnv: "GATEWAY_PORT", - DefaultPort: 8086, + PortEnv: "GATEWAY_INTERNAL_PORT", + DefaultPort: cfg.Port, } + app := serviceboot.NewFiberApp(bootCfg) + serviceboot.RegisterHealth(app, bootCfg.ServiceSlug) + serviceboot.RegisterReadiness(app, 2*time.Second, readinessChecks(cfg, redisClient)...) + app.Get("/metrics", adaptor.HTTPHandler(sharedmetrics.Handler())) + + app.Use(middleware.RequestContext(logger)) + app.Use(middleware.SecurityHeaders(cfg.Security)) + app.Use(middleware.CORS(cfg.CORS)) - app := serviceboot.NewFiberApp(cfg) - serviceboot.RegisterHealth(app, cfg.ServiceSlug) + authMiddleware := buildAuthMiddleware(cfg) + rateLimitMiddleware := middleware.RateLimitMiddleware(redisClient, cfg.Rate, cfg.PublicPrefix, logger) - addr := serviceboot.ListenAddress(cfg.PortEnv, cfg.DefaultPort) + httpapi.RegisterRoutes(app, httpapi.Options{ + PublicPrefix: cfg.PublicPrefix, + Upstreams: cfg.Upstreams, + Proxy: proxy.New(cfg.UpstreamTimeout, logger), + AuthMiddleware: authMiddleware, + RateLimitMiddleware: rateLimitMiddleware, + }) + + addr := serviceboot.ListenAddress(bootCfg.PortEnv, bootCfg.DefaultPort) log.Fatal(serviceboot.Run(app, addr)) } + +func initRedis(cfg gconfig.Config, logger *logging.Logger) *redisv9.Client { + opt := &redisv9.Options{ + Addr: cfg.Redis.Addr(), + Password: cfg.Redis.Password, + DB: cfg.Redis.DB, + PoolSize: cfg.Redis.PoolSize, + MinIdleConns: cfg.Redis.MinIdleConns, + DialTimeout: cfg.Redis.DialTimeout, + ReadTimeout: cfg.Redis.ReadTimeout, + WriteTimeout: cfg.Redis.WriteTimeout, + } + + client := redisv9.NewClient(opt) + ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second) + defer cancel() + + if err := client.Ping(ctx).Err(); err != nil { + logger.WithError(err).Warn("redis unavailable; rate limiting running in degraded fail-open mode") + _ = client.Close() + return nil + } + + return client +} + +func readinessChecks(cfg gconfig.Config, redisClient *redisv9.Client) []serviceboot.ReadyCheck { + checks := []serviceboot.ReadyCheck{ + { + Name: "redis", + Required: false, + Probe: func(ctx context.Context) error { + if redisClient == nil { + return fmt.Errorf("redis unavailable") + } + return redisClient.Ping(ctx).Err() + }, + }, + { + Name: "game-session", + Required: false, + Probe: makeHealthProbe(cfg.Upstreams.GameSession, cfg.UpstreamTimeout), + }, + { + Name: "question-bank", + Required: false, + Probe: makeHealthProbe(cfg.Upstreams.QuestionBank, cfg.UpstreamTimeout), + }, + { + Name: "user", + Required: false, + Probe: makeHealthProbe(cfg.Upstreams.User, cfg.UpstreamTimeout), + }, + { + Name: "leaderboard", + Required: false, + Probe: makeHealthProbe(cfg.Upstreams.Leaderboard, cfg.UpstreamTimeout), + }, + { + Name: "admin", + Required: false, + Probe: makeHealthProbe(cfg.Upstreams.Admin, cfg.UpstreamTimeout), + }, + } + return checks +} + +func makeHealthProbe(baseURL string, timeout time.Duration) func(ctx context.Context) error { + if timeout <= 0 { + timeout = 2 * time.Second + } + + return func(ctx context.Context) error { + healthURL := strings.TrimRight(baseURL, "/") + "/health" + req, err := http.NewRequestWithContext(ctx, http.MethodGet, healthURL, nil) + if err != nil { + return err + } + + client := &http.Client{Timeout: timeout} + resp, err := client.Do(req) + if err != nil { + return err + } + defer resp.Body.Close() + + if resp.StatusCode >= 400 { + return fmt.Errorf("upstream returned %d", resp.StatusCode) + } + return nil + } +} + +func buildAuthMiddleware(cfg gconfig.Config) fiber.Handler { + skipPaths := []string{ + "/health", + "/ready", + "/metrics", + cfg.PublicPrefix + "/questions", + cfg.PublicPrefix + "/leaderboard/top10", + cfg.PublicPrefix + "/leaderboard/stats", + cfg.PublicPrefix + "/admin/auth", + cfg.PublicPrefix + "/users/register", + cfg.PublicPrefix + "/users/verify-email", + } + + return zitadel.BuildJWTMiddleware(zitadel.MiddlewareFactoryConfig{ + BaseURL: cfg.ZitadelBaseURL, + ClientID: cfg.ZitadelClientID, + ClientSecret: cfg.ZitadelSecret, + Issuer: cfg.ZitadelIssuer, + Audience: cfg.ZitadelAudience, + RequiredClaims: []string{ + "sub", + }, + AdminEndpoints: []string{cfg.PublicPrefix + "/admin"}, + SkipPaths: skipPaths, + Timeout: 10 * time.Second, + }) +} diff --git a/backend/services/gateway-service/go.mod b/backend/services/gateway-service/go.mod index 57a8da7..0548284 100644 --- a/backend/services/gateway-service/go.mod +++ b/backend/services/gateway-service/go.mod @@ -2,20 +2,58 @@ module knowfoolery/backend/services/gateway-service go 1.25.5 -require knowfoolery/backend/shared v0.0.0 +require ( + github.com/gofiber/fiber/v3 v3.0.0-beta.3 + github.com/google/uuid v1.6.0 + github.com/redis/go-redis/v9 v9.7.0 + github.com/stretchr/testify v1.11.1 + knowfoolery/backend/shared v0.0.0 +) require ( + github.com/MicahParks/jwkset v0.11.0 // indirect + github.com/MicahParks/keyfunc/v3 v3.7.0 // indirect github.com/andybalholm/brotli v1.1.0 // indirect - github.com/gofiber/fiber/v3 v3.0.0-beta.3 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cenkalti/backoff/v5 v5.0.3 // indirect + github.com/cespare/xxhash/v2 v2.3.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect + github.com/go-logr/logr v1.4.3 // indirect + github.com/go-logr/stdr v1.2.2 // indirect github.com/gofiber/utils/v2 v2.0.0-beta.4 // indirect - github.com/google/uuid v1.6.0 // indirect + github.com/golang-jwt/jwt/v5 v5.2.2 // indirect + github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.7 // indirect github.com/klauspost/compress v1.17.9 // indirect github.com/mattn/go-colorable v0.1.13 // indirect github.com/mattn/go-isatty v0.0.20 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/prometheus/client_golang v1.20.5 // indirect + github.com/prometheus/client_model v0.6.1 // indirect + github.com/prometheus/common v0.55.0 // indirect + github.com/prometheus/procfs v0.15.1 // indirect + github.com/rs/zerolog v1.33.0 // indirect github.com/valyala/bytebufferpool v1.0.0 // indirect github.com/valyala/fasthttp v1.55.0 // indirect github.com/valyala/tcplisten v1.0.0 // indirect + go.opentelemetry.io/auto/sdk v1.2.1 // indirect + go.opentelemetry.io/otel v1.40.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0 // indirect + go.opentelemetry.io/otel/metric v1.40.0 // indirect + go.opentelemetry.io/otel/sdk v1.40.0 // indirect + go.opentelemetry.io/otel/trace v1.40.0 // indirect + go.opentelemetry.io/proto/otlp v1.9.0 // indirect + golang.org/x/net v0.49.0 // indirect golang.org/x/sys v0.40.0 // indirect + golang.org/x/text v0.33.0 // indirect + golang.org/x/time v0.9.0 // indirect + google.golang.org/genproto/googleapis/api v0.0.0-20260128011058-8636f8732409 // indirect + google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409 // indirect + google.golang.org/grpc v1.78.0 // indirect + google.golang.org/protobuf v1.36.11 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect ) replace knowfoolery/backend/shared => ../../shared diff --git a/backend/services/gateway-service/go.sum b/backend/services/gateway-service/go.sum index 97bf2d6..5ff07eb 100644 --- a/backend/services/gateway-service/go.sum +++ b/backend/services/gateway-service/go.sum @@ -1,15 +1,135 @@ +github.com/MicahParks/jwkset v0.11.0 h1:yc0zG+jCvZpWgFDFmvs8/8jqqVBG9oyIbmBtmjOhoyQ= +github.com/MicahParks/jwkset v0.11.0/go.mod h1:U2oRhRaLgDCLjtpGL2GseNKGmZtLs/3O7p+OZaL5vo0= +github.com/MicahParks/keyfunc/v3 v3.7.0 h1:pdafUNyq+p3ZlvjJX1HWFP7MA3+cLpDtg69U3kITJGM= +github.com/MicahParks/keyfunc/v3 v3.7.0/go.mod h1:z66bkCviwqfg2YUp+Jcc/xRE9IXLcMq6DrgV/+Htru0= +github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a h1:HbKu58rmZpUGpz5+4FfNmIU+FmZg2P3Xaj2v2bfNWmk= +github.com/alicebob/gopher-json 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v0.0.0-20260128011058-8636f8732409/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ= +google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc= +google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U= +google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE= +google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco= +gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk= +gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/backend/services/gateway-service/internal/infra/config/config.go b/backend/services/gateway-service/internal/infra/config/config.go new file mode 100644 index 0000000..8f71c84 --- /dev/null +++ b/backend/services/gateway-service/internal/infra/config/config.go @@ -0,0 +1,195 @@ +package config + +import ( + "strconv" + "strings" + "time" + + "knowfoolery/backend/services/gateway-service/internal/infra/routing" + sharedredis "knowfoolery/backend/shared/infra/database/redis" + "knowfoolery/backend/shared/infra/observability/logging" + "knowfoolery/backend/shared/infra/observability/metrics" + "knowfoolery/backend/shared/infra/observability/tracing" + "knowfoolery/backend/shared/infra/utils/envutil" +) + +// CORSConfig controls gateway CORS behavior. +type CORSConfig struct { + AllowedOrigins []string + AllowedMethods string + AllowedHeaders string + AllowCredentials bool + MaxAgeSeconds int +} + +// SecurityHeadersConfig controls security-related HTTP response headers. +type SecurityHeadersConfig struct { + ContentSecurityPolicy string + EnableHSTS bool + HSTSMaxAge int + FrameOptions string + ContentTypeOptions bool + ReferrerPolicy string + PermissionsPolicy string +} + +// RateLimitConfig controls request rate limits. +type RateLimitConfig struct { + GeneralRequests int + AuthRequests int + APIRequests int + AdminRequests int + Window time.Duration +} + +// Config is the runtime configuration for gateway-service. +type Config struct { + AppName string + Port int + + PublicPrefix string + UpstreamTimeout time.Duration + Upstreams routing.Upstreams + + CORS CORSConfig + Security SecurityHeadersConfig + Rate RateLimitConfig + + Redis sharedredis.Config + Tracing tracing.Config + Metrics metrics.Config + Logging logging.Config + + ZitadelBaseURL string + ZitadelIssuer string + ZitadelAudience string + ZitadelClientID string + ZitadelSecret string +} + +// FromEnv builds config from environment variables. +func FromEnv() Config { + env := envutil.String("ENVIRONMENT", "development") + serviceName := "gateway-service" + + logCfg := logging.DefaultConfig() + logCfg.ServiceName = serviceName + logCfg.Environment = env + logCfg.Level = envutil.String("LOG_LEVEL", logCfg.Level) + + traceCfg := tracing.ConfigFromEnv() + if traceCfg.ServiceName == "knowfoolery" { + traceCfg.ServiceName = serviceName + } + traceCfg.Environment = env + + metricsCfg := metrics.ConfigFromEnv() + if metricsCfg.ServiceName == "knowfoolery" { + metricsCfg.ServiceName = serviceName + } + + prefix := normalizePrefix(envutil.String("GATEWAY_PUBLIC_PREFIX", "/api/v1")) + + cfg := Config{ + AppName: "Know Foolery - Gateway Service", + Port: envutil.Int("GATEWAY_INTERNAL_PORT", 18086), + + PublicPrefix: prefix, + UpstreamTimeout: envutil.Duration("GATEWAY_UPSTREAM_TIMEOUT", 3*time.Second), + Upstreams: routing.Upstreams{ + GameSession: envutil.String("GAME_SESSION_BASE_URL", "http://localhost:8080"), + QuestionBank: envutil.String("QUESTION_BANK_BASE_URL", "http://localhost:8081"), + User: envutil.String("USER_SERVICE_BASE_URL", "http://localhost:8082"), + Leaderboard: envutil.String("LEADERBOARD_BASE_URL", "http://localhost:8083"), + Admin: envutil.String("ADMIN_SERVICE_BASE_URL", "http://localhost:8085"), + }, + + CORS: CORSConfig{ + AllowedOrigins: parseCSV(envutil.String("GATEWAY_ALLOWED_ORIGINS", "http://localhost:5173")), + AllowedMethods: envutil.String("GATEWAY_ALLOWED_METHODS", "GET,POST,PUT,DELETE,OPTIONS"), + AllowedHeaders: envutil.String("GATEWAY_ALLOWED_HEADERS", "Origin,Content-Type,Accept,Authorization"), + AllowCredentials: parseBool( + "GATEWAY_ALLOW_CREDENTIALS", + true, + ), + MaxAgeSeconds: envutil.Int("GATEWAY_CORS_MAX_AGE_SECONDS", 300), + }, + + Security: SecurityHeadersConfig{ + ContentSecurityPolicy: envutil.String( + "GATEWAY_CSP", + "default-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'", + ), + EnableHSTS: parseBool("GATEWAY_ENABLE_HSTS", true), + HSTSMaxAge: envutil.Int("GATEWAY_HSTS_MAX_AGE", 31536000), + FrameOptions: envutil.String("GATEWAY_FRAME_OPTIONS", "DENY"), + ContentTypeOptions: parseBool("GATEWAY_CONTENT_TYPE_OPTIONS", true), + ReferrerPolicy: envutil.String("GATEWAY_REFERRER_POLICY", "strict-origin-when-cross-origin"), + PermissionsPolicy: envutil.String( + "GATEWAY_PERMISSIONS_POLICY", + "geolocation=(), microphone=(), camera=(), payment=(), usb=()", + ), + }, + + Rate: RateLimitConfig{ + GeneralRequests: envutil.Int("GATEWAY_RATE_GENERAL", 100), + AuthRequests: envutil.Int("GATEWAY_RATE_AUTH", 5), + APIRequests: envutil.Int("GATEWAY_RATE_API", 60), + AdminRequests: envutil.Int("GATEWAY_RATE_ADMIN", 30), + Window: envutil.Duration("GATEWAY_RATE_WINDOW", time.Minute), + }, + + Redis: sharedredis.ConfigFromEnv(), + Tracing: traceCfg, + Metrics: metricsCfg, + Logging: logCfg, + + ZitadelBaseURL: envutil.String("ZITADEL_URL", ""), + ZitadelIssuer: envutil.String("ZITADEL_ISSUER", ""), + ZitadelAudience: envutil.String("ZITADEL_AUDIENCE", ""), + ZitadelClientID: envutil.String("ZITADEL_CLIENT_ID", ""), + ZitadelSecret: envutil.String("ZITADEL_CLIENT_SECRET", ""), + } + + return cfg +} + +func normalizePrefix(raw string) string { + trimmed := strings.TrimSpace(raw) + if trimmed == "" { + return "/api/v1" + } + if !strings.HasPrefix(trimmed, "/") { + trimmed = "/" + trimmed + } + return strings.TrimRight(trimmed, "/") +} + +func parseCSV(raw string) []string { + if strings.TrimSpace(raw) == "" { + return nil + } + + parts := strings.Split(raw, ",") + out := make([]string, 0, len(parts)) + for _, part := range parts { + v := strings.TrimSpace(part) + if v == "" { + continue + } + out = append(out, v) + } + return out +} + +func parseBool(key string, fallback bool) bool { + raw := envutil.String(key, "") + if raw == "" { + return fallback + } + parsed, err := strconv.ParseBool(raw) + if err != nil { + return fallback + } + return parsed +} diff --git a/backend/services/gateway-service/internal/infra/proxy/reverse_proxy.go b/backend/services/gateway-service/internal/infra/proxy/reverse_proxy.go new file mode 100644 index 0000000..930bb39 --- /dev/null +++ b/backend/services/gateway-service/internal/infra/proxy/reverse_proxy.go @@ -0,0 +1,203 @@ +package proxy + +import ( + "bytes" + "fmt" + "io" + "net/http" + "net/url" + "strings" + "time" + + "github.com/gofiber/fiber/v3" + + "knowfoolery/backend/shared/infra/auth/zitadel" + "knowfoolery/backend/shared/infra/observability/logging" + "knowfoolery/backend/shared/infra/utils/httputil" +) + +// ReverseProxy forwards incoming requests to configured upstream services. +type ReverseProxy struct { + client *http.Client + logger *logging.Logger +} + +// New creates a reverse proxy with the provided timeout. +func New(timeout time.Duration, logger *logging.Logger) *ReverseProxy { + if timeout <= 0 { + timeout = 3 * time.Second + } + + return &ReverseProxy{ + client: &http.Client{Timeout: timeout}, + logger: logger, + } +} + +// NewWithClient creates a reverse proxy using a custom HTTP client. +func NewWithClient(client *http.Client, logger *logging.Logger) *ReverseProxy { + if client == nil { + client = &http.Client{Timeout: 3 * time.Second} + } + return &ReverseProxy{ + client: client, + logger: logger, + } +} + +// Forward sends the current request to upstreamBaseURL with targetPath. +func (p *ReverseProxy) Forward(c fiber.Ctx, upstreamBaseURL string, targetPath string) error { + base, err := url.Parse(upstreamBaseURL) + if err != nil { + return httputil.InternalError(c, "Invalid upstream configuration") + } + + reqURL := *base + reqURL.Path = joinPath(base.Path, targetPath) + reqURL.RawQuery = string(c.Request().URI().QueryString()) + + proxyReq, err := http.NewRequestWithContext( + c.Context(), + c.Method(), + reqURL.String(), + bytes.NewReader(c.Body()), + ) + if err != nil { + return httputil.InternalError(c, "Failed to build upstream request") + } + + copyRequestHeaders(c, proxyReq) + injectForwardedHeaders(c, proxyReq) + injectUserHeaders(c, proxyReq) + + resp, err := p.client.Do(proxyReq) + if err != nil { + if p.logger != nil { + p.logger.WithError(err).Warn("upstream request failed") + } + return c.Status(fiber.StatusBadGateway).JSON(httputil.NewErrorResponse( + "UPSTREAM_UNAVAILABLE", + "Upstream service unavailable", + err.Error(), + )) + } + defer resp.Body.Close() + + copyResponseHeaders(c, resp) + c.Status(resp.StatusCode) + + body, err := io.ReadAll(resp.Body) + if err != nil { + if p.logger != nil { + p.logger.WithError(err).Warn("failed to read upstream response") + } + return c.Status(fiber.StatusBadGateway).JSON(httputil.NewErrorResponse( + "UPSTREAM_RESPONSE_ERROR", + "Failed to read upstream response", + err.Error(), + )) + } + + if len(body) == 0 { + return nil + } + return c.Send(body) +} + +func joinPath(basePath string, reqPath string) string { + bp := strings.TrimRight(basePath, "/") + rp := reqPath + if rp == "" { + rp = "/" + } + if !strings.HasPrefix(rp, "/") { + rp = "/" + rp + } + if bp == "" { + return rp + } + return bp + rp +} + +func copyRequestHeaders(c fiber.Ctx, req *http.Request) { + c.Request().Header.VisitAll(func(k []byte, v []byte) { + name := string(k) + if isHopByHopHeader(name) || strings.EqualFold(name, "Host") { + return + } + req.Header.Add(name, string(v)) + }) +} + +func injectForwardedHeaders(c fiber.Ctx, req *http.Request) { + clientIP := c.IP() + xff := c.Get("X-Forwarded-For") + if xff == "" { + req.Header.Set("X-Forwarded-For", clientIP) + } else { + req.Header.Set("X-Forwarded-For", xff+", "+clientIP) + } + req.Header.Set("X-Forwarded-Proto", c.Protocol()) + + if reqID := requestID(c); reqID != "" { + req.Header.Set("X-Request-ID", reqID) + } +} + +func injectUserHeaders(c fiber.Ctx, req *http.Request) { + if userID := localString(c, string(zitadel.ContextKeyUserID)); userID != "" { + req.Header.Set("X-User-ID", userID) + } + if email := localString(c, string(zitadel.ContextKeyUserEmail)); email != "" { + req.Header.Set("X-User-Email", email) + } + if roles := c.Locals(string(zitadel.ContextKeyUserRoles)); roles != nil { + if vals, ok := roles.([]string); ok { + req.Header.Set("X-User-Roles", strings.Join(vals, ",")) + } + } + if mfa := c.Locals(string(zitadel.ContextKeyMFAVerified)); mfa != nil { + if verified, ok := mfa.(bool); ok { + req.Header.Set("X-User-MFA-Verified", fmt.Sprintf("%t", verified)) + } + } +} + +func copyResponseHeaders(c fiber.Ctx, resp *http.Response) { + for name, values := range resp.Header { + if isHopByHopHeader(name) { + continue + } + for _, v := range values { + c.Append(name, v) + } + } +} + +func isHopByHopHeader(name string) bool { + switch strings.ToLower(name) { + case "connection", "keep-alive", "proxy-authenticate", "proxy-authorization", "te", "trailer", + "transfer-encoding", "upgrade": + return true + default: + return false + } +} + +func localString(c fiber.Ctx, key string) string { + if raw := c.Locals(key); raw != nil { + if s, ok := raw.(string); ok { + return s + } + } + return "" +} + +func requestID(c fiber.Ctx) string { + if raw := c.Locals("request_id"); raw != nil { + if s, ok := raw.(string); ok { + return s + } + } + return "" +} diff --git a/backend/services/gateway-service/internal/infra/routing/upstreams.go b/backend/services/gateway-service/internal/infra/routing/upstreams.go new file mode 100644 index 0000000..4ab14e8 --- /dev/null +++ b/backend/services/gateway-service/internal/infra/routing/upstreams.go @@ -0,0 +1,41 @@ +package routing + +import ( + "fmt" + "net/url" +) + +// Upstreams holds the base URL for each backend service. +type Upstreams struct { + GameSession string + QuestionBank string + User string + Leaderboard string + Admin string +} + +// Validate ensures all upstream URLs are present and valid absolute URLs. +func (u Upstreams) Validate() error { + checks := map[string]string{ + "game-session": u.GameSession, + "question-bank": u.QuestionBank, + "user": u.User, + "leaderboard": u.Leaderboard, + "admin": u.Admin, + } + + for name, raw := range checks { + if raw == "" { + return fmt.Errorf("%s upstream URL is required", name) + } + parsed, err := url.Parse(raw) + if err != nil { + return fmt.Errorf("invalid %s upstream URL: %w", name, err) + } + if parsed.Scheme == "" || parsed.Host == "" { + return fmt.Errorf("invalid %s upstream URL: must include scheme and host", name) + } + } + + return nil +} diff --git a/backend/services/gateway-service/internal/interfaces/http/middleware/cors.go b/backend/services/gateway-service/internal/interfaces/http/middleware/cors.go new file mode 100644 index 0000000..76a8ffa --- /dev/null +++ b/backend/services/gateway-service/internal/interfaces/http/middleware/cors.go @@ -0,0 +1,65 @@ +package middleware + +import ( + "strconv" + "strings" + + "github.com/gofiber/fiber/v3" + + gconfig "knowfoolery/backend/services/gateway-service/internal/infra/config" +) + +// CORS applies strict cross-origin controls for browser clients. +func CORS(cfg gconfig.CORSConfig) fiber.Handler { + allowed := make(map[string]struct{}, len(cfg.AllowedOrigins)) + allowAll := false + for _, origin := range cfg.AllowedOrigins { + if origin == "*" { + allowAll = true + continue + } + allowed[strings.TrimSpace(origin)] = struct{}{} + } + + return func(c fiber.Ctx) error { + origin := strings.TrimSpace(c.Get("Origin")) + if origin == "" { + return c.Next() + } + + if !allowAll { + if _, ok := allowed[origin]; !ok { + if c.Method() == fiber.MethodOptions { + return c.SendStatus(fiber.StatusForbidden) + } + return c.Next() + } + } + + if allowAll { + c.Set("Access-Control-Allow-Origin", "*") + } else { + c.Set("Access-Control-Allow-Origin", origin) + c.Set("Vary", "Origin") + } + + if cfg.AllowCredentials { + c.Set("Access-Control-Allow-Credentials", "true") + } + if cfg.AllowedMethods != "" { + c.Set("Access-Control-Allow-Methods", cfg.AllowedMethods) + } + if cfg.AllowedHeaders != "" { + c.Set("Access-Control-Allow-Headers", cfg.AllowedHeaders) + } + if cfg.MaxAgeSeconds > 0 { + c.Set("Access-Control-Max-Age", strconv.Itoa(cfg.MaxAgeSeconds)) + } + + if c.Method() == fiber.MethodOptions { + return c.SendStatus(fiber.StatusNoContent) + } + + return c.Next() + } +} diff --git a/backend/services/gateway-service/internal/interfaces/http/middleware/rate_limit.go b/backend/services/gateway-service/internal/interfaces/http/middleware/rate_limit.go new file mode 100644 index 0000000..eec3d42 --- /dev/null +++ b/backend/services/gateway-service/internal/interfaces/http/middleware/rate_limit.go @@ -0,0 +1,218 @@ +package middleware + +import ( + "fmt" + "strconv" + "strings" + "time" + + "github.com/gofiber/fiber/v3" + redisv9 "github.com/redis/go-redis/v9" + + gconfig "knowfoolery/backend/services/gateway-service/internal/infra/config" + "knowfoolery/backend/shared/infra/auth/zitadel" + "knowfoolery/backend/shared/infra/observability/logging" + "knowfoolery/backend/shared/infra/utils/httputil" +) + +type rateTier struct { + Name string + Limit int + Window time.Duration + RetrySec int +} + +// RateLimitMiddleware applies Redis-backed sliding window limits with fail-open fallback. +func RateLimitMiddleware( + client *redisv9.Client, + cfg gconfig.RateLimitConfig, + prefix string, + logger *logging.Logger, +) fiber.Handler { + tiers := map[string]rateTier{ + "general": {Name: "general", Limit: maxInt(cfg.GeneralRequests, 1), + Window: positiveDuration(cfg.Window, time.Minute)}, + "auth": {Name: "auth", Limit: maxInt(cfg.AuthRequests, 1), Window: positiveDuration(cfg.Window, time.Minute)}, + "api": {Name: "api", Limit: maxInt(cfg.APIRequests, 1), Window: positiveDuration(cfg.Window, time.Minute)}, + "admin": {Name: "admin", Limit: maxInt(cfg.AdminRequests, 1), Window: positiveDuration(cfg.Window, time.Minute)}, + } + + script := redisv9.NewScript(` +local key = KEYS[1] +local now = tonumber(ARGV[1]) +local window = tonumber(ARGV[2]) +local limit = tonumber(ARGV[3]) +local member = ARGV[4] + +redis.call('ZREMRANGEBYSCORE', key, 0, now - window) +local count = redis.call('ZCARD', key) + +if count >= limit then + local oldest = redis.call('ZRANGE', key, 0, 0, 'WITHSCORES') + local reset = now + window + if oldest[2] ~= nil then + reset = tonumber(oldest[2]) + window + end + return {0, count, reset} +end + +redis.call('ZADD', key, now, member) +redis.call('PEXPIRE', key, window) +count = count + 1 + +return {1, count, now + window} +`) + + return func(c fiber.Ctx) error { + if c.Method() == fiber.MethodOptions { + return c.Next() + } + + tier := selectTier(c.Path(), prefix, tiers) + if client == nil { + c.Set("X-RateLimit-Policy", "degraded") + c.Set("X-RateLimit-Limit", strconv.Itoa(tier.Limit)) + return c.Next() + } + + now := time.Now() + nowMS := now.UnixMilli() + windowMS := tier.Window.Milliseconds() + + member := fmt.Sprintf("%d:%s", now.UnixNano(), c.IP()) + key := fmt.Sprintf("gateway:rate:%s:%s", tier.Name, identifyRequester(c)) + + result, err := script.Run( + c.Context(), + client, + []string{key}, + nowMS, + windowMS, + tier.Limit, + member, + ).Result() + if err != nil { + if logger != nil { + logger.WithError(err).Warn("rate limiter degraded (redis unavailable)") + } + c.Set("X-RateLimit-Policy", "degraded") + c.Set("X-RateLimit-Limit", strconv.Itoa(tier.Limit)) + return c.Next() + } + + allowed, count, resetMS, ok := parseLimiterResult(result) + if !ok { + if logger != nil { + logger.Warn("rate limiter degraded (unexpected redis response)") + } + c.Set("X-RateLimit-Policy", "degraded") + c.Set("X-RateLimit-Limit", strconv.Itoa(tier.Limit)) + return c.Next() + } + + remaining := tier.Limit - int(count) + if remaining < 0 { + remaining = 0 + } + resetUnix := time.UnixMilli(resetMS).Unix() + c.Set("X-RateLimit-Limit", strconv.Itoa(tier.Limit)) + c.Set("X-RateLimit-Remaining", strconv.Itoa(remaining)) + c.Set("X-RateLimit-Reset", strconv.FormatInt(resetUnix, 10)) + + if !allowed { + retry := int(resetUnix - now.Unix()) + if retry <= 0 { + retry = 1 + } + if logger != nil { + logger.SecurityEvent( + "rate_limit_exceeded", + identifyRequester(c), + c.IP(), + "medium", + map[string]interface{}{"tier": tier.Name, "path": c.Path()}, + ) + } + return httputil.TooManyRequests(c, "Rate limit exceeded", retry) + } + + return c.Next() + } +} + +func selectTier(path string, prefix string, tiers map[string]rateTier) rateTier { + authPaths := []string{ + prefix + "/admin/auth", + prefix + "/users/register", + prefix + "/users/verify-email", + } + for _, authPath := range authPaths { + if strings.HasPrefix(path, authPath) { + return tiers["auth"] + } + } + + if strings.HasPrefix(path, prefix+"/admin") { + return tiers["admin"] + } + if strings.HasPrefix(path, prefix) { + return tiers["api"] + } + return tiers["general"] +} + +func identifyRequester(c fiber.Ctx) string { + if raw := c.Locals(string(zitadel.ContextKeyUserID)); raw != nil { + if userID, ok := raw.(string); ok && userID != "" { + return "user:" + userID + } + } + return "ip:" + c.IP() +} + +func parseLimiterResult(v interface{}) (allowed bool, count int64, resetMS int64, ok bool) { + arr, isSlice := v.([]interface{}) + if !isSlice || len(arr) < 3 { + return false, 0, 0, false + } + + allowedVal, okA := toInt64(arr[0]) + count, okC := toInt64(arr[1]) + resetMS, okR := toInt64(arr[2]) + if !okA || !okC || !okR { + return false, 0, 0, false + } + + return allowedVal == 1, count, resetMS, true +} + +func toInt64(v interface{}) (int64, bool) { + switch t := v.(type) { + case int64: + return t, true + case int: + return int64(t), true + case string: + parsed, err := strconv.ParseInt(t, 10, 64) + if err != nil { + return 0, false + } + return parsed, true + default: + return 0, false + } +} + +func positiveDuration(v time.Duration, fallback time.Duration) time.Duration { + if v <= 0 { + return fallback + } + return v +} + +func maxInt(v int, fallback int) int { + if v <= 0 { + return fallback + } + return v +} diff --git a/backend/services/gateway-service/internal/interfaces/http/middleware/request_context.go b/backend/services/gateway-service/internal/interfaces/http/middleware/request_context.go new file mode 100644 index 0000000..efef9e3 --- /dev/null +++ b/backend/services/gateway-service/internal/interfaces/http/middleware/request_context.go @@ -0,0 +1,57 @@ +package middleware + +import ( + "time" + + "github.com/gofiber/fiber/v3" + "github.com/google/uuid" + + "knowfoolery/backend/shared/infra/auth/zitadel" + "knowfoolery/backend/shared/infra/observability/logging" +) + +const requestIDKey = "request_id" + +// RequestContext injects request id metadata and logs request completion. +func RequestContext(logger *logging.Logger) fiber.Handler { + return func(c fiber.Ctx) error { + reqID := c.Get("X-Request-ID") + if reqID == "" { + reqID = uuid.NewString() + } + c.Locals(requestIDKey, reqID) + c.Set("X-Request-ID", reqID) + + started := time.Now() + err := c.Next() + + userID := "" + if raw := c.Locals(string(zitadel.ContextKeyUserID)); raw != nil { + if s, ok := raw.(string); ok { + userID = s + } + } + + if logger != nil { + logger.APIRequest( + c.Method(), + c.Path(), + c.Response().StatusCode(), + time.Since(started), + userID, + ) + } + + return err + } +} + +// RequestID returns the request identifier for current request. +func RequestID(c fiber.Ctx) string { + if raw := c.Locals(requestIDKey); raw != nil { + if s, ok := raw.(string); ok { + return s + } + } + return "" +} diff --git a/backend/services/gateway-service/internal/interfaces/http/middleware/security_headers.go b/backend/services/gateway-service/internal/interfaces/http/middleware/security_headers.go new file mode 100644 index 0000000..6507ad0 --- /dev/null +++ b/backend/services/gateway-service/internal/interfaces/http/middleware/security_headers.go @@ -0,0 +1,49 @@ +package middleware + +import ( + "strconv" + "strings" + + "github.com/gofiber/fiber/v3" + + gconfig "knowfoolery/backend/services/gateway-service/internal/infra/config" +) + +// SecurityHeaders sets response headers for baseline browser hardening. +func SecurityHeaders(cfg gconfig.SecurityHeadersConfig) fiber.Handler { + return func(c fiber.Ctx) error { + if cfg.ContentSecurityPolicy != "" { + c.Set("Content-Security-Policy", cfg.ContentSecurityPolicy) + } + if cfg.FrameOptions != "" { + c.Set("X-Frame-Options", cfg.FrameOptions) + } + if cfg.ContentTypeOptions { + c.Set("X-Content-Type-Options", "nosniff") + } + if cfg.ReferrerPolicy != "" { + c.Set("Referrer-Policy", cfg.ReferrerPolicy) + } + if cfg.PermissionsPolicy != "" { + c.Set("Permissions-Policy", cfg.PermissionsPolicy) + } + c.Set("X-XSS-Protection", "1; mode=block") + c.Set("Server", "") + + if cfg.EnableHSTS && isHTTPS(c) { + c.Set( + "Strict-Transport-Security", + "max-age="+strconv.Itoa(cfg.HSTSMaxAge)+"; includeSubDomains", + ) + } + + return c.Next() + } +} + +func isHTTPS(c fiber.Ctx) bool { + if strings.EqualFold(c.Protocol(), "https") { + return true + } + return strings.EqualFold(c.Get("X-Forwarded-Proto"), "https") +} diff --git a/backend/services/gateway-service/internal/interfaces/http/routes.go b/backend/services/gateway-service/internal/interfaces/http/routes.go new file mode 100644 index 0000000..c9fb5e5 --- /dev/null +++ b/backend/services/gateway-service/internal/interfaces/http/routes.go @@ -0,0 +1,84 @@ +package http + +import ( + "strings" + + "github.com/gofiber/fiber/v3" + + "knowfoolery/backend/services/gateway-service/internal/infra/proxy" + "knowfoolery/backend/services/gateway-service/internal/infra/routing" +) + +// Options defines route wiring dependencies. +type Options struct { + PublicPrefix string + Upstreams routing.Upstreams + Proxy *proxy.ReverseProxy + + AuthMiddleware fiber.Handler + RateLimitMiddleware fiber.Handler +} + +// RegisterRoutes registers gateway forwarding routes. +func RegisterRoutes(app *fiber.App, opts Options) { + prefix := normalizePrefix(opts.PublicPrefix) + api := app.Group(prefix) + + if opts.RateLimitMiddleware != nil { + api.Use(opts.RateLimitMiddleware) + } + if opts.AuthMiddleware != nil { + api.Use(opts.AuthMiddleware) + } + + // Question bank public routes. + api.Post("/questions/random", forward(opts, opts.Upstreams.QuestionBank)) + api.Get("/questions/:id", forward(opts, opts.Upstreams.QuestionBank)) + api.Post("/questions/:id/validate-answer", forward(opts, opts.Upstreams.QuestionBank)) + + // Session routes. + api.All("/sessions", forward(opts, opts.Upstreams.GameSession)) + api.All("/sessions/*", forward(opts, opts.Upstreams.GameSession)) + + // User routes. + api.All("/users", forward(opts, opts.Upstreams.User)) + api.All("/users/*", forward(opts, opts.Upstreams.User)) + + // Leaderboard routes. + api.Get("/leaderboard/top10", forward(opts, opts.Upstreams.Leaderboard)) + api.Get("/leaderboard/stats", forward(opts, opts.Upstreams.Leaderboard)) + api.Get("/leaderboard/players/:id", forward(opts, opts.Upstreams.Leaderboard)) + api.Post("/leaderboard/update", forward(opts, opts.Upstreams.Leaderboard)) + + // Admin passthrough routes. + api.All("/admin/questions", forward(opts, opts.Upstreams.QuestionBank)) + api.All("/admin/questions/*", forward(opts, opts.Upstreams.QuestionBank)) + api.All("/admin/themes", forward(opts, opts.Upstreams.QuestionBank)) + api.All("/admin/themes/*", forward(opts, opts.Upstreams.QuestionBank)) + api.All("/admin/users", forward(opts, opts.Upstreams.User)) + api.All("/admin/users/*", forward(opts, opts.Upstreams.User)) + api.Post("/admin/auth", forward(opts, opts.Upstreams.Admin)) + api.Get("/admin/dashboard", forward(opts, opts.Upstreams.Admin)) + api.Get("/admin/audit", forward(opts, opts.Upstreams.Admin)) +} + +func forward(opts Options, upstream string) fiber.Handler { + return func(c fiber.Ctx) error { + targetPath := strings.TrimPrefix(c.Path(), normalizePrefix(opts.PublicPrefix)) + if targetPath == "" { + targetPath = "/" + } + return opts.Proxy.Forward(c, upstream, targetPath) + } +} + +func normalizePrefix(raw string) string { + prefix := strings.TrimSpace(raw) + if prefix == "" { + prefix = "/api/v1" + } + if !strings.HasPrefix(prefix, "/") { + prefix = "/" + prefix + } + return strings.TrimRight(prefix, "/") +} diff --git a/backend/services/gateway-service/tests/integration_http_test.go b/backend/services/gateway-service/tests/integration_http_test.go new file mode 100644 index 0000000..935ce93 --- /dev/null +++ b/backend/services/gateway-service/tests/integration_http_test.go @@ -0,0 +1,194 @@ +package tests + +import ( + "io" + "net/http" + "net/http/httptest" + "strings" + "testing" + "time" + + "github.com/gofiber/fiber/v3" + "github.com/stretchr/testify/require" + + gconfig "knowfoolery/backend/services/gateway-service/internal/infra/config" + "knowfoolery/backend/services/gateway-service/internal/infra/proxy" + "knowfoolery/backend/services/gateway-service/internal/infra/routing" + httpapi "knowfoolery/backend/services/gateway-service/internal/interfaces/http" + "knowfoolery/backend/services/gateway-service/internal/interfaces/http/middleware" + "knowfoolery/backend/shared/infra/auth/zitadel" +) + +func TestGateway_PublicRoute_ProxiesAndRewritesPath(t *testing.T) { + t.Parallel() + + var receivedPath string + var receivedQuery string + client := &http.Client{Transport: roundTripperFunc(func(r *http.Request) (*http.Response, error) { + receivedPath = r.URL.Path + receivedQuery = r.URL.RawQuery + return jsonResponse(http.StatusOK, `{"ok":true}`), nil + })} + + app := buildTestApp(t, "http://upstream.local", client) + + req := httptest.NewRequest(http.MethodGet, "/api/v1/leaderboard/top10?window=7d", nil) + req.Header.Set("Origin", "http://localhost:5173") + res, err := app.Test(req) + require.NoError(t, err) + defer res.Body.Close() + + require.Equal(t, http.StatusOK, res.StatusCode) + require.Equal(t, "/leaderboard/top10", receivedPath) + require.Equal(t, "window=7d", receivedQuery) + require.Equal(t, "http://localhost:5173", res.Header.Get("Access-Control-Allow-Origin")) + require.Equal(t, "DENY", res.Header.Get("X-Frame-Options")) + require.Equal(t, "degraded", res.Header.Get("X-RateLimit-Policy")) +} + +func TestGateway_ProtectedRoute_RequiresAuth(t *testing.T) { + t.Parallel() + + client := &http.Client{Transport: roundTripperFunc(func(r *http.Request) (*http.Response, error) { + return jsonResponse(http.StatusOK, `{"ok":true}`), nil + })} + + app := buildTestApp(t, "http://upstream.local", client) + + req := httptest.NewRequest(http.MethodGet, "/api/v1/leaderboard/players/player-1", nil) + res, err := app.Test(req) + require.NoError(t, err) + defer res.Body.Close() + + require.Equal(t, http.StatusUnauthorized, res.StatusCode) +} + +func TestGateway_ProtectedRoute_ForwardsUserHeaders(t *testing.T) { + t.Parallel() + + received := make(map[string]string) + client := &http.Client{Transport: roundTripperFunc(func(r *http.Request) (*http.Response, error) { + received["x-user-id"] = r.Header.Get("X-User-ID") + received["x-user-email"] = r.Header.Get("X-User-Email") + received["x-user-roles"] = r.Header.Get("X-User-Roles") + received["x-user-mfa"] = r.Header.Get("X-User-MFA-Verified") + return jsonResponse(http.StatusOK, `{"ok":true}`), nil + })} + + app := buildTestApp(t, "http://upstream.local", client) + + req := httptest.NewRequest(http.MethodGet, "/api/v1/leaderboard/players/player-1", nil) + req.Header.Set("Authorization", "Bearer test-token") + res, err := app.Test(req) + require.NoError(t, err) + defer res.Body.Close() + + require.Equal(t, http.StatusOK, res.StatusCode) + require.Equal(t, "user-123", received["x-user-id"]) + require.Equal(t, "player@example.com", received["x-user-email"]) + require.Equal(t, "player", received["x-user-roles"]) + require.Equal(t, "true", received["x-user-mfa"]) +} + +func TestGateway_PreflightCors(t *testing.T) { + t.Parallel() + + client := &http.Client{Transport: roundTripperFunc(func(r *http.Request) (*http.Response, error) { + return jsonResponse(http.StatusOK, `{"ok":true}`), nil + })} + app := buildTestApp(t, "http://upstream.local", client) + + req := httptest.NewRequest(http.MethodOptions, "/api/v1/sessions/start", nil) + req.Header.Set("Origin", "http://localhost:5173") + req.Header.Set("Access-Control-Request-Method", "POST") + + res, err := app.Test(req) + require.NoError(t, err) + defer res.Body.Close() + + require.Equal(t, http.StatusNoContent, res.StatusCode) + require.Equal(t, "http://localhost:5173", res.Header.Get("Access-Control-Allow-Origin")) +} + +func buildTestApp(t *testing.T, upstreamURL string, client *http.Client) *fiber.App { + t.Helper() + + app := fiber.New() + app.Use(middleware.RequestContext(nil)) + app.Use(middleware.SecurityHeaders(gconfig.SecurityHeadersConfig{ + ContentSecurityPolicy: "default-src 'self'", + EnableHSTS: false, + HSTSMaxAge: 31536000, + FrameOptions: "DENY", + ContentTypeOptions: true, + ReferrerPolicy: "strict-origin-when-cross-origin", + PermissionsPolicy: "geolocation=()", + })) + app.Use(middleware.CORS(gconfig.CORSConfig{ + AllowedOrigins: []string{"http://localhost:5173"}, + AllowedMethods: "GET,POST,PUT,DELETE,OPTIONS", + AllowedHeaders: "Origin,Content-Type,Accept,Authorization", + AllowCredentials: true, + MaxAgeSeconds: 300, + })) + + authMiddleware := func(c fiber.Ctx) error { + path := c.Path() + public := []string{ + "/api/v1/questions", + "/api/v1/leaderboard/top10", + "/api/v1/leaderboard/stats", + "/api/v1/admin/auth", + "/api/v1/users/register", + "/api/v1/users/verify-email", + } + for _, p := range public { + if strings.HasPrefix(path, p) { + return c.Next() + } + } + + if c.Get("Authorization") == "" { + return c.Status(http.StatusUnauthorized).JSON(fiber.Map{"error": true, "message": "Authorization header required"}) + } + + c.Locals(string(zitadel.ContextKeyUserID), "user-123") + c.Locals(string(zitadel.ContextKeyUserEmail), "player@example.com") + c.Locals(string(zitadel.ContextKeyUserRoles), []string{"player"}) + c.Locals(string(zitadel.ContextKeyMFAVerified), true) + return c.Next() + } + + httpapi.RegisterRoutes(app, httpapi.Options{ + PublicPrefix: "/api/v1", + Upstreams: routing.Upstreams{ + GameSession: upstreamURL, + QuestionBank: upstreamURL, + User: upstreamURL, + Leaderboard: upstreamURL, + Admin: upstreamURL, + }, + Proxy: proxy.NewWithClient(client, nil), + AuthMiddleware: authMiddleware, + RateLimitMiddleware: middleware.RateLimitMiddleware(nil, gconfig.RateLimitConfig{ + GeneralRequests: 100, AuthRequests: 5, APIRequests: 60, AdminRequests: 30, Window: time.Minute}, "/api/v1", nil), + }) + + return app +} + +type roundTripperFunc func(*http.Request) (*http.Response, error) + +func (fn roundTripperFunc) RoundTrip(req *http.Request) (*http.Response, error) { + return fn(req) +} + +func jsonResponse(status int, body string) *http.Response { + return &http.Response{ + StatusCode: status, + Header: http.Header{ + "Content-Type": []string{"application/json"}, + }, + Body: io.NopCloser(strings.NewReader(body)), + } +} diff --git a/backend/services/leaderboard-service/go.sum b/backend/services/leaderboard-service/go.sum index 64dc880..1cc8700 100644 --- a/backend/services/leaderboard-service/go.sum +++ b/backend/services/leaderboard-service/go.sum @@ -1,70 +1,156 @@ github.com/MicahParks/jwkset v0.11.0 h1:yc0zG+jCvZpWgFDFmvs8/8jqqVBG9oyIbmBtmjOhoyQ= +github.com/MicahParks/jwkset v0.11.0/go.mod h1:U2oRhRaLgDCLjtpGL2GseNKGmZtLs/3O7p+OZaL5vo0= github.com/MicahParks/keyfunc/v3 v3.7.0 h1:pdafUNyq+p3ZlvjJX1HWFP7MA3+cLpDtg69U3kITJGM= +github.com/MicahParks/keyfunc/v3 v3.7.0/go.mod h1:z66bkCviwqfg2YUp+Jcc/xRE9IXLcMq6DrgV/+Htru0= github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a h1:HbKu58rmZpUGpz5+4FfNmIU+FmZg2P3Xaj2v2bfNWmk= +github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc= github.com/alicebob/miniredis/v2 v2.33.0 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h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/infrastructure/dev/docker-compose.yml b/infrastructure/dev/docker-compose.yml index f6dc77c..c404712 100644 --- a/infrastructure/dev/docker-compose.yml +++ b/infrastructure/dev/docker-compose.yml @@ -41,6 +41,52 @@ services: networks: - knowfoolery-network + # API Gateway Service (Go Fiber) + gateway-service: + image: golang:1.25-alpine + container_name: knowfoolery-gateway-service + working_dir: /workspace/backend/services/gateway-service + command: sh -c "go run ./cmd/main.go" + env_file: + - .env + environment: + GATEWAY_INTERNAL_PORT: ${GATEWAY_INTERNAL_PORT} + GAME_SESSION_BASE_URL: http://host.docker.internal:${GAME_SESSION_PORT} + QUESTION_BANK_BASE_URL: http://host.docker.internal:${QUESTION_BANK_PORT} + USER_SERVICE_BASE_URL: http://host.docker.internal:${USER_SERVICE_PORT} + LEADERBOARD_BASE_URL: http://host.docker.internal:${LEADERBOARD_PORT} + ADMIN_SERVICE_BASE_URL: http://host.docker.internal:${ADMIN_SERVICE_PORT} + volumes: + - ../../:/workspace + extra_hosts: + - "host.docker.internal:host-gateway" + depends_on: + redis: + condition: service_started + networks: + - knowfoolery-network + profiles: + - gateway + + # Public NGINX entrypoint for gateway + nginx: + image: nginx:1.27-alpine + container_name: knowfoolery-nginx + env_file: + - .env + ports: + - "${GATEWAY_PORT}:8086" + volumes: + - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro + - ./nginx/conf.d/default.conf:/etc/nginx/conf.d/default.conf:ro + depends_on: + gateway-service: + condition: service_started + networks: + - knowfoolery-network + profiles: + - gateway + # Zitadel Authentication (optional for initial setup) zitadel: image: ghcr.io/zitadel/zitadel:latest diff --git a/infrastructure/dev/nginx/conf.d/default.conf b/infrastructure/dev/nginx/conf.d/default.conf new file mode 100644 index 0000000..35e1671 --- /dev/null +++ b/infrastructure/dev/nginx/conf.d/default.conf @@ -0,0 +1,29 @@ +upstream gateway_upstream { + server gateway-service:18086; +} + +server { + listen 8086; + server_name _; + + location = /nginx/health { + access_log off; + add_header Content-Type text/plain; + return 200 'ok'; + } + + location / { + proxy_http_version 1.1; + proxy_set_header Host $host; + proxy_set_header X-Real-IP $remote_addr; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_set_header X-Forwarded-Proto $scheme; + proxy_set_header X-Request-ID $request_id; + + proxy_connect_timeout 3s; + proxy_send_timeout 30s; + proxy_read_timeout 30s; + + proxy_pass http://gateway_upstream; + } +} diff --git a/infrastructure/dev/nginx/nginx.conf b/infrastructure/dev/nginx/nginx.conf new file mode 100644 index 0000000..a2b1777 --- /dev/null +++ b/infrastructure/dev/nginx/nginx.conf @@ -0,0 +1,27 @@ +worker_processes auto; + +events { + worker_connections 1024; +} + +http { + include /etc/nginx/mime.types; + default_type application/octet-stream; + + sendfile on; + tcp_nopush on; + tcp_nodelay on; + keepalive_timeout 65; + types_hash_max_size 2048; + + server_tokens off; + + log_format main '$remote_addr - $remote_user [$time_local] "$request" ' + '$status $body_bytes_sent "$http_referer" ' + '"$http_user_agent" "$http_x_forwarded_for"'; + + access_log /var/log/nginx/access.log main; + error_log /var/log/nginx/error.log warn; + + include /etc/nginx/conf.d/*.conf; +}