From 07e8b5ae0343dd2dbe4e4ffc74f9c308cf8cf8a3 Mon Sep 17 00:00:00 2001
From: Bilal Amarni <bilal.amarni@gmail.com>
Date: Fri, 15 Mar 2019 15:17:37 +0100
Subject: [PATCH] [go] support decoding plain string responses (#2414)

For the following spec:

``` yaml
      responses:
        "200":
          description: Pong.
          content:
            text/plain:
              schema:
                type: string
```

The generated client currently fails with `undefined response type`.

In this scenario, `v interface{}` is a string pointer which can be
populated regardless of the content-type.
---
 .../openapi-generator/src/main/resources/go/client.mustache   | 4 ++++
 samples/client/petstore/go/go-petstore/client.go              | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/modules/openapi-generator/src/main/resources/go/client.mustache b/modules/openapi-generator/src/main/resources/go/client.mustache
index 6c05b5aec6d9..876fcb58ca35 100644
--- a/modules/openapi-generator/src/main/resources/go/client.mustache
+++ b/modules/openapi-generator/src/main/resources/go/client.mustache
@@ -317,6 +317,10 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if s, ok := v.(*string); ok {
+		*s = string(b)
+		return nil
+	}
 	if xmlCheck.MatchString(contentType) {
 		if err = xml.Unmarshal(b, v); err != nil {
 			return err
diff --git a/samples/client/petstore/go/go-petstore/client.go b/samples/client/petstore/go/go-petstore/client.go
index f45bf93f15c8..1da02b57f318 100644
--- a/samples/client/petstore/go/go-petstore/client.go
+++ b/samples/client/petstore/go/go-petstore/client.go
@@ -328,6 +328,10 @@ func (c *APIClient) prepareRequest(
 }
 
 func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
+	if s, ok := v.(*string); ok {
+		*s = string(b)
+		return nil
+	}
 	if xmlCheck.MatchString(contentType) {
 		if err = xml.Unmarshal(b, v); err != nil {
 			return err