Merge pull request onflow#6596 from AndriiDiachuk/rest-msg-max-reques…

…t-size-configurable

[Access] Make REST message size limit configurable

cmd/access/node_builder/access_node_builder.go

@@ -220,10 +220,11 @@ func DefaultAccessNodeConfig() *AccessNodeConfig {
 				TxResultQueryMode:   backend.IndexQueryModeExecutionNodesOnly.String(), // default to ENs only for now
 			},
 			RestConfig: rest.Config{
-				ListenAddress: "",
-				WriteTimeout:  rest.DefaultWriteTimeout,
-				ReadTimeout:   rest.DefaultReadTimeout,
-				IdleTimeout:   rest.DefaultIdleTimeout,
+				ListenAddress:  "",
+				WriteTimeout:   rest.DefaultWriteTimeout,
+				ReadTimeout:    rest.DefaultReadTimeout,
+				IdleTimeout:    rest.DefaultIdleTimeout,
+				MaxRequestSize: routes.DefaultMaxRequestSize,
 			},
 			MaxMsgSize:     grpcutils.DefaultMaxMsgSize,
 			CompressorName: grpcutils.NoCompressor,
@@ -1190,6 +1191,10 @@ func (builder *FlowAccessNodeBuilder) extraFlags() {
 			defaultConfig.rpcConf.RestConfig.ReadTimeout,
 			"timeout to use when reading REST request headers")
 		flags.DurationVar(&builder.rpcConf.RestConfig.IdleTimeout, "rest-idle-timeout", defaultConfig.rpcConf.RestConfig.IdleTimeout, "idle timeout for REST connections")
+		flags.Int64Var(&builder.rpcConf.RestConfig.MaxRequestSize,
+			"rest-max-request-size",
+			defaultConfig.rpcConf.RestConfig.MaxRequestSize,
+			"the maximum request size in bytes for payload sent over REST server")
 		flags.StringVarP(&builder.rpcConf.CollectionAddr,
 			"static-collection-ingress-addr",
 			"",
@@ -1508,6 +1513,10 @@ func (builder *FlowAccessNodeBuilder) extraFlags() {
 			return errors.New("execution-data-indexing-enabled must be set if check-payer-balance is enabled")
 		}
 
+		if builder.rpcConf.RestConfig.MaxRequestSize <= 0 {
+			return errors.New("rest-max-request-size must be greater than 0")
+		}
+
 		return nil
 	})
 }

cmd/observer/node_builder/observer_builder.go

@@ -191,10 +191,11 @@ func DefaultObserverServiceConfig() *ObserverServiceConfig {
 				TxResultQueryMode:         backend.IndexQueryModeExecutionNodesOnly.String(), // default to ENs only for now
 			},
 			RestConfig: rest.Config{
-				ListenAddress: "",
-				WriteTimeout:  rest.DefaultWriteTimeout,
-				ReadTimeout:   rest.DefaultReadTimeout,
-				IdleTimeout:   rest.DefaultIdleTimeout,
+				ListenAddress:  "",
+				WriteTimeout:   rest.DefaultWriteTimeout,
+				ReadTimeout:    rest.DefaultReadTimeout,
+				IdleTimeout:    rest.DefaultIdleTimeout,
+				MaxRequestSize: routes.DefaultMaxRequestSize,
 			},
 			MaxMsgSize:     grpcutils.DefaultMaxMsgSize,
 			CompressorName: grpcutils.NoCompressor,
@@ -621,6 +622,10 @@ func (builder *ObserverServiceBuilder) extraFlags() {
 			defaultConfig.rpcConf.RestConfig.ReadTimeout,
 			"timeout to use when reading REST request headers")
 		flags.DurationVar(&builder.rpcConf.RestConfig.IdleTimeout, "rest-idle-timeout", defaultConfig.rpcConf.RestConfig.IdleTimeout, "idle timeout for REST connections")
+		flags.Int64Var(&builder.rpcConf.RestConfig.MaxRequestSize,
+			"rest-max-request-size",
+			defaultConfig.rpcConf.RestConfig.MaxRequestSize,
+			"the maximum request size in bytes for payload sent over REST server")
 		flags.UintVar(&builder.rpcConf.MaxMsgSize,
 			"rpc-max-message-size",
 			defaultConfig.rpcConf.MaxMsgSize,
@@ -851,6 +856,10 @@ func (builder *ObserverServiceBuilder) extraFlags() {
 			}
 		}
 
+		if builder.rpcConf.RestConfig.MaxRequestSize <= 0 {
+			return errors.New("rest-max-request-size must be greater than 0")
+		}
+
 		return nil
 	})
 }

engine/access/rest/routes/handler.go

@@ -36,12 +36,13 @@ func NewHandler(
 	handlerFunc ApiHandlerFunc,
 	generator models.LinkGenerator,
 	chain flow.Chain,
+	maxRequestSize int64,
 ) *Handler {
 	handler := &Handler{
 		backend:        backend,
 		apiHandlerFunc: handlerFunc,
 		linkGenerator:  generator,
-		HttpHandler:    NewHttpHandler(logger, chain),
+		HttpHandler:    NewHttpHandler(logger, chain, maxRequestSize),
 	}
 
 	return handler

engine/access/rest/routes/http_handler.go

@@ -16,23 +16,27 @@ import (
 	"github.com/onflow/flow-go/model/flow"
 )
 
-const MaxRequestSize = 2 << 20 // 2MB
+const DefaultMaxRequestSize = 2 << 20 // 2MB
 
 // HttpHandler is custom http handler implementing custom handler function.
 // HttpHandler function allows easier handling of errors and responses as it
 // wraps functionality for handling error and responses outside of endpoint handling.
 type HttpHandler struct {
 	Logger zerolog.Logger
 	Chain  flow.Chain
+
+	MaxRequestSize int64
 }
 
 func NewHttpHandler(
 	logger zerolog.Logger,
 	chain flow.Chain,
+	maxRequestSize int64,
 ) *HttpHandler {
 	return &HttpHandler{
-		Logger: logger,
-		Chain:  chain,
+		Logger:         logger,
+		Chain:          chain,
+		MaxRequestSize: maxRequestSize,
 	}
 }
 
@@ -43,7 +47,7 @@ func (h *HttpHandler) VerifyRequest(w http.ResponseWriter, r *http.Request) erro
 	errLog := h.Logger.With().Str("request_url", r.URL.String()).Logger()
 
 	// limit requested body size
-	r.Body = http.MaxBytesReader(w, r.Body, MaxRequestSize)
+	r.Body = http.MaxBytesReader(w, r.Body, h.MaxRequestSize)
 	err := r.ParseForm()
 	if err != nil {
 		h.errorHandler(w, err, errLog)

engine/access/rest/routes/router.go

@@ -46,10 +46,14 @@ func NewRouterBuilder(
 }
 
 // AddRestRoutes adds rest routes to the router.
-func (b *RouterBuilder) AddRestRoutes(backend access.API, chain flow.Chain) *RouterBuilder {
+func (b *RouterBuilder) AddRestRoutes(
+	backend access.API,
+	chain flow.Chain,
+	maxRequestSize int64,
+) *RouterBuilder {
 	linkGenerator := models.NewLinkGeneratorImpl(b.v1SubRouter)
 	for _, r := range Routes {
-		h := NewHandler(b.logger, backend, r.Handler, linkGenerator, chain)
+		h := NewHandler(b.logger, backend, r.Handler, linkGenerator, chain, maxRequestSize)
 		b.v1SubRouter.
 			Methods(r.Method).
 			Path(r.Pattern).
@@ -64,10 +68,11 @@ func (b *RouterBuilder) AddWsRoutes(
 	stateStreamApi state_stream.API,
 	chain flow.Chain,
 	stateStreamConfig backend.Config,
+	maxRequestSize int64,
 ) *RouterBuilder {
 
 	for _, r := range WSRoutes {
-		h := NewWSHandler(b.logger, stateStreamApi, r.Handler, chain, stateStreamConfig)
+		h := NewWSHandler(b.logger, stateStreamApi, r.Handler, chain, stateStreamConfig, maxRequestSize)
 		b.v1SubRouter.
 			Methods(r.Method).
 			Path(r.Pattern).

engine/access/rest/routes/test_helpers.go

@@ -126,6 +126,7 @@ func executeRequest(req *http.Request, backend access.API) *httptest.ResponseRec
 	).AddRestRoutes(
 		backend,
 		flow.Testnet.Chain(),
+		DefaultMaxRequestSize,
 	).Build()
 
 	rr := httptest.NewRecorder()
@@ -144,7 +145,7 @@ func executeWsRequest(req *http.Request, stateStreamApi state_stream.API, respon
 
 	router := NewRouterBuilder(unittest.Logger(), restCollector).AddWsRoutes(
 		stateStreamApi,
-		chain, config).Build()
+		chain, config, DefaultMaxRequestSize).Build()
 	router.ServeHTTP(responseRecorder, req)
 }
 

engine/access/rest/routes/websocket_handler.go

@@ -253,6 +253,7 @@ func NewWSHandler(
 	subscribeFunc SubscribeHandlerFunc,
 	chain flow.Chain,
 	stateStreamConfig backend.Config,
+	maxRequestSize int64,
 ) *WSHandler {
 	handler := &WSHandler{
 		subscribeFunc:            subscribeFunc,
@@ -261,7 +262,7 @@ func NewWSHandler(
 		maxStreams:               int32(stateStreamConfig.MaxGlobalStreams),
 		defaultHeartbeatInterval: stateStreamConfig.HeartbeatInterval,
 		activeStreamCount:        atomic.NewInt32(0),
-		HttpHandler:              NewHttpHandler(logger, chain),
+		HttpHandler:              NewHttpHandler(logger, chain, maxRequestSize),
 	}
 
 	return handler

engine/access/rest/server.go

@@ -27,10 +27,11 @@ const (
 )
 
 type Config struct {
-	ListenAddress string
-	WriteTimeout  time.Duration
-	ReadTimeout   time.Duration
-	IdleTimeout   time.Duration
+	ListenAddress  string
+	WriteTimeout   time.Duration
+	ReadTimeout    time.Duration
+	IdleTimeout    time.Duration
+	MaxRequestSize int64
 }
 
 // NewServer returns an HTTP server initialized with the REST API handler
@@ -42,9 +43,9 @@ func NewServer(serverAPI access.API,
 	stateStreamApi state_stream.API,
 	stateStreamConfig backend.Config,
 ) (*http.Server, error) {
-	builder := routes.NewRouterBuilder(logger, restCollector).AddRestRoutes(serverAPI, chain)
+	builder := routes.NewRouterBuilder(logger, restCollector).AddRestRoutes(serverAPI, chain, config.MaxRequestSize)
 	if stateStreamApi != nil {
-		builder.AddWsRoutes(stateStreamApi, chain, stateStreamConfig)
+		builder.AddWsRoutes(stateStreamApi, chain, stateStreamConfig, config.MaxRequestSize)
 	}
 
 	c := cors.New(cors.Options{

engine/access/rest_api_test.go

@@ -424,7 +424,7 @@ func (suite *RestAPITestSuite) TestRequestSizeRestriction() {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	defer cancel()
 	// make a request of size larger than the max permitted size
-	requestBytes := make([]byte, routes.MaxRequestSize+1)
+	requestBytes := make([]byte, routes.DefaultMaxRequestSize+1)
 	script := restclient.ScriptsBody{
 		Script: string(requestBytes),
 	}