[#70] Support configuring buffer size for put

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

cmd/http-gw/settings.go

@@ -39,6 +39,8 @@ const (
 
 	defaultSoftMemoryLimit = math.MaxInt64
 
+	defaultBufferMaxSizeForPut = 1024 * 1024 // 1mb
+
 	cfgServer      = "server"
 	cfgTLSEnabled  = "tls.enabled"
 	cfgTLSCertFile = "tls.cert_file"
@@ -98,6 +100,8 @@ const (
 
 	// Enabling client side object preparing for PUT operations.
 	cfgClientCut = "frostfs.client_cut"
+	// Sets max buffer size for read payload in put operations.
+	cfgBufferMaxSizeForPut = "frostfs.buffer_max_size_for_put"
 
 	// Command line args.
 	cmdHelp          = "help"
@@ -160,6 +164,9 @@ func settings() *viper.Viper {
 	// pool:
 	v.SetDefault(cfgPoolErrorThreshold, defaultPoolErrorThreshold)
 
+	// frostfs:
+	v.SetDefault(cfgBufferMaxSizeForPut, defaultBufferMaxSizeForPut)
+
 	// web-server:
 	v.SetDefault(cfgWebReadBufferSize, 4096)
 	v.SetDefault(cfgWebWriteBufferSize, 4096)