From 1ccf4b9cb3a2877f7ec8a2e59fe0916601b64aa7 Mon Sep 17 00:00:00 2001
From: dukov <dukov@mirantis.com>
Date: Tue, 19 Nov 2019 19:20:15 -0800
Subject: [PATCH] [Go] Bypass object decode in case of empty body (#4546)

Fixes #4545

Change-Id: Ic724843713f60f996ed72326ad6ef6762ec2e713
---
 .../src/main/resources/go-experimental/client.mustache         | 3 +++
 .../openapi-generator/src/main/resources/go/client.mustache    | 3 +++
 samples/client/petstore/go/go-petstore-withXml/client.go       | 3 +++
 samples/client/petstore/go/go-petstore/client.go               | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/modules/openapi-generator/src/main/resources/go-experimental/client.mustache b/modules/openapi-generator/src/main/resources/go-experimental/client.mustache
index ec129d3d432..cefd6c7c409 100644
--- a/modules/openapi-generator/src/main/resources/go-experimental/client.mustache
+++ b/modules/openapi-generator/src/main/resources/go-experimental/client.mustache
@@ -339,6 +339,9 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if len(b) == 0 {
+		return nil
+	}
 	if s, ok := v.(*string); ok {
 		*s = string(b)
 		return nil
diff --git a/modules/openapi-generator/src/main/resources/go/client.mustache b/modules/openapi-generator/src/main/resources/go/client.mustache
index ec129d3d432..cefd6c7c409 100644
--- a/modules/openapi-generator/src/main/resources/go/client.mustache
+++ b/modules/openapi-generator/src/main/resources/go/client.mustache
@@ -339,6 +339,9 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if len(b) == 0 {
+		return nil
+	}
 	if s, ok := v.(*string); ok {
 		*s = string(b)
 		return nil
diff --git a/samples/client/petstore/go/go-petstore-withXml/client.go b/samples/client/petstore/go/go-petstore-withXml/client.go
index 73bf022c888..490d804736f 100644
--- a/samples/client/petstore/go/go-petstore-withXml/client.go
+++ b/samples/client/petstore/go/go-petstore-withXml/client.go
@@ -351,6 +351,9 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if len(b) == 0 {
+		return nil
+	}
 	if s, ok := v.(*string); ok {
 		*s = string(b)
 		return nil
diff --git a/samples/client/petstore/go/go-petstore/client.go b/samples/client/petstore/go/go-petstore/client.go
index c73a8db8d09..343078e15cd 100644
--- a/samples/client/petstore/go/go-petstore/client.go
+++ b/samples/client/petstore/go/go-petstore/client.go
@@ -350,6 +350,9 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if len(b) == 0 {
+		return nil
+	}
 	if s, ok := v.(*string); ok {
 		*s = string(b)
 		return nil