node, rpc: add configurable HTTP request limit (#28948)

Adds a configurable HTTP request limit, and bumps the engine default

node/defaults.go

@@ -41,6 +41,7 @@ const (
 	// needs of all CLs.
 	engineAPIBatchItemLimit         = 2000
 	engineAPIBatchResponseSizeLimit = 250 * 1000 * 1000
+	engineAPIBodyLimit              = 128 * 1024 * 1024
 )
 
 var (

node/node.go

@@ -453,14 +453,16 @@ func (n *Node) startRPC() error {
 			jwtSecret:              secret,
 			batchItemLimit:         engineAPIBatchItemLimit,
 			batchResponseSizeLimit: engineAPIBatchResponseSizeLimit,
+			httpBodyLimit:          engineAPIBodyLimit,
 		}
-		if err := server.enableRPC(allAPIs, httpConfig{
+		err := server.enableRPC(allAPIs, httpConfig{
 			CorsAllowedOrigins: DefaultAuthCors,
 			Vhosts:             n.config.AuthVirtualHosts,
 			Modules:            DefaultAuthModules,
 			prefix:             DefaultAuthPrefix,
 			rpcEndpointConfig:  sharedConfig,
-		}); err != nil {
+		})
+		if err != nil {
 			return err
 		}
 		servers = append(servers, server)

node/rpcstack.go

@@ -56,6 +56,7 @@ type rpcEndpointConfig struct {
 	jwtSecret              []byte // optional JWT secret
 	batchItemLimit         int
 	batchResponseSizeLimit int
+	httpBodyLimit          int
 }
 
 type rpcHandler struct {
@@ -304,6 +305,9 @@ func (h *httpServer) enableRPC(apis []rpc.API, config httpConfig) error {
 	// Create RPC server and handler.
 	srv := rpc.NewServer()
 	srv.SetBatchLimits(config.batchItemLimit, config.batchResponseSizeLimit)
+	if config.httpBodyLimit > 0 {
+		srv.SetHTTPBodyLimit(config.httpBodyLimit)
+	}
 	if err := RegisterApis(apis, config.Modules, srv); err != nil {
 		return err
 	}
@@ -336,6 +340,9 @@ func (h *httpServer) enableWS(apis []rpc.API, config wsConfig) error {
 	// Create RPC server and handler.
 	srv := rpc.NewServer()
 	srv.SetBatchLimits(config.batchItemLimit, config.batchResponseSizeLimit)
+	if config.httpBodyLimit > 0 {
+		srv.SetHTTPBodyLimit(config.httpBodyLimit)
+	}
 	if err := RegisterApis(apis, config.Modules, srv); err != nil {
 		return err
 	}