Handle StatResult.Code is empty string

authapi/authapi.go

@@ -48,6 +48,7 @@ func (api *AuthApi) Ping() (*PingResult, error) {
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -72,6 +73,7 @@ func (api *AuthApi) Check() (*CheckResult, error) {
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -98,6 +100,7 @@ func (api *AuthApi) Logo() (*LogoResult, error) {
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -145,6 +148,7 @@ func (api *AuthApi) Enroll(options ...func(*url.Values)) (*EnrollResult, error)
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -174,6 +178,7 @@ func (api *AuthApi) EnrollStatus(userid string,
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -239,6 +244,7 @@ func (api *AuthApi) Preauth(options ...func(*url.Values)) (*PreauthResult, error
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -348,6 +354,7 @@ func (api *AuthApi) Auth(factor string, options ...func(*url.Values)) (*AuthResu
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }
 
@@ -377,5 +384,6 @@ func (api *AuthApi) AuthStatus(txid string) (*AuthStatusResult, error) {
 	if err = json.Unmarshal(body, ret); err != nil {
 		return nil, err
 	}
+	ret.SyncCode()
 	return ret, nil
 }

authapi/authapi_test.go

@@ -12,7 +12,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/duosecurity/duo_api_golang"
+	duoapi "github.com/duosecurity/duo_api_golang"
 )
 
 func buildAuthApi(url string, proxy func(*http.Request) (*url.URL, error)) *AuthApi {
@@ -203,7 +203,7 @@ func TestLogo(t *testing.T) {
 	}
 }
 
-// Test a failure logo reqeust / response.
+// Test a failure logo request / response.
 func TestLogoError(t *testing.T) {
 	ts := httptest.NewTLSServer(
 		http.HandlerFunc(
@@ -602,3 +602,40 @@ func TestAuthStatus(t *testing.T) {
 		t.Error("Unexpected response status msg: " + res.Response.Status_Msg)
 	}
 }
+
+// Test a response with empty code.
+func TestEmptyResponseCode(t *testing.T) {
+	ts := httptest.NewTLSServer(
+		http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				// Return a 400, as if the logo was not found.
+				w.WriteHeader(400)
+				fmt.Fprintln(w, `
+                {
+                    "stat": "FAIL",
+                    "code": "",
+                    "message": "Code is empty",
+                    "message_detail": "Deal with it"
+                  }`)
+			}))
+	defer ts.Close()
+
+	duo := buildAuthApi(ts.URL, nil)
+
+	res, err := duo.Logo()
+	if err != nil {
+		t.Error("Failed TestCheck: " + err.Error())
+	}
+	if res.Stat != "FAIL" {
+		t.Error("Expected FAIL, but got " + res.Stat)
+	}
+	if res.Code == nil || *res.Code != 0 {
+		t.Error("Unexpected response code.")
+	}
+	if res.Message == nil || *res.Message != "Code is empty" {
+		t.Error("Unexpected message.")
+	}
+	if res.Message_Detail == nil || *res.Message_Detail != "Deal with it" {
+		t.Error("Unexpected message detail.")
+	}
+}

duoapi.go

@@ -259,14 +259,41 @@ func (duoapi *DuoApi) buildOptions(options ...DuoApiOption) *requestOptions {
 	return opts
 }
 
+type NullableInt32 struct {
+	value *int32
+}
+
 // API calls will return a StatResult object.  On success, Stat is 'OK'.
 // On error, Stat is 'FAIL', and Code, Message, and Message_Detail
 // contain error information.
 type StatResult struct {
-	Stat           string
-	Code           *int32
-	Message        *string
-	Message_Detail *string
+	Stat           string        `json:"stat"`
+	Ncode          NullableInt32 `json:"code"`
+	Code           *int32        `json:"-"`
+	Message        *string       `json:"message"`
+	Message_Detail *string       `json:"message_detail"`
+}
+
+func (n *NullableInt32) UnmarshalJSON(data []byte) error {
+	var raw interface{}
+
+	if err := json.Unmarshal(data, &raw); err != nil {
+		return err
+	}
+
+	switch v := raw.(type) {
+	case float64:
+		intVal := int32(v)
+		n.value = &intVal
+	case string:
+		intVal := int32(0)
+		n.value = &intVal
+	}
+	return nil
+}
+
+func (s *StatResult) SyncCode() {
+	s.Code = s.Ncode.value
 }
 
 // SetCustomHTTPClient allows one to set a completely custom http client that