support Device Group HTTP POST Request (#299)

* support Device Group HTTP POST Request

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* fix vendor

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

* check error exist

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

vendor/github.com/appleboy/go-fcm/response.go

@@ -49,6 +49,9 @@ var (
 
 	// ErrInvalidParameters occurs when provided parameters have the right name and type
 	ErrInvalidParameters = errors.New("check that the provided parameters have the right name and type")
+
+	// ErrUnknown for unknown error type
+	ErrUnknown = errors.New("unknown error type")
 )
 
 var (
@@ -147,7 +150,13 @@ func (r *Response) UnmarshalJSON(data []byte) error {
 	r.Success = response.Success
 	r.FailedRegistrationIDs = response.FailedRegistrationIDs
 	r.MessageID = response.MessageID
-	r.Error = errMap[response.Error]
+	if response.Error != "" {
+		if val, ok := errMap[response.Error]; ok {
+			r.Error = val
+		} else {
+			r.Error = ErrUnknown
+		}
+	}
 
 	return nil
 }
@@ -173,7 +182,13 @@ func (r *Result) UnmarshalJSON(data []byte) error {
 
 	r.MessageID = result.MessageID
 	r.RegistrationID = result.RegistrationID
-	r.Error = errMap[result.Error]
+	if result.Error != "" {
+		if val, ok := errMap[result.Error]; ok {
+			r.Error = val
+		} else {
+			r.Error = ErrUnknown
+		}
+	}
 
 	return nil
 }

vendor/vendor.json

@@ -3,10 +3,12 @@
 	"ignore": "test",
 	"package": [
 		{
-			"checksumSHA1": "TVTjsXflagrWbTXmbxPJdCtTFRo=",
+			"checksumSHA1": "1Jql7x7zDOmbDxGr4gsa8rFEC5g=",
 			"path": "github.com/appleboy/go-fcm",
-			"revision": "c12f9e2e95b14802da2b4d3807dd12ef0dd80a42",
-			"revisionTime": "2017-10-24T08:00:40Z"
+			"revision": "3bc382cee4180b7e4753761fda69a003de97b0e9",
+			"revisionTime": "2017-10-25T02:33:50Z",
+			"version": "0.1.1",
+			"versionExact": "0.1.1"
 		},
 		{
 			"checksumSHA1": "Ab7MUtqX0iq2PUzzBxWpgzPSydw=",