When mangaling JSON to parse durations do a case insensitive key lookup

command/agent/agent_endpoint.go

@@ -118,10 +118,17 @@ func (s *HTTPServer) AgentRegisterService(resp http.ResponseWriter, req *http.Re
 		if !ok {
 			return nil
 		}
-		check, ok := rawMap["check"]
-		if !ok {
+
+		var check interface{}
+		for k, v := range rawMap {
+			if strings.ToLower(k) == "check" {
+				check = v
+			}
+		}
+		if check == nil {
 			return nil
 		}
+
 		return FixupCheckType(check)
 	}
 	if err := decodeBody(req, &args, decodeCB); err != nil {

command/agent/config.go

@@ -265,23 +265,38 @@ func FixupCheckType(raw interface{}) error {
 	if !ok {
 		return nil
 	}
-	if ttl, ok := rawMap["ttl"]; ok {
+
+	var ttlKey string
+	for k, _ := range rawMap {
+		if strings.ToLower(k) == "ttl" {
+			ttlKey = k
+		}
+	}
+	var intervalKey string
+	for k, _ := range rawMap {
+		if strings.ToLower(k) == "interval" {
+			intervalKey = k
+		}
+	}
+
+	if ttl, ok := rawMap[ttlKey]; ok {
 		ttlS, ok := ttl.(string)
 		if ok {
 			if dur, err := time.ParseDuration(ttlS); err != nil {
 				return err
 			} else {
-				rawMap["ttl"] = dur
+				rawMap[ttlKey] = dur
 			}
 		}
 	}
-	if interval, ok := rawMap["interval"]; ok {
+
+	if interval, ok := rawMap[intervalKey]; ok {
 		intervalS, ok := interval.(string)
 		if ok {
 			if dur, err := time.ParseDuration(intervalS); err != nil {
 				return err
 			} else {
-				rawMap["interval"] = dur
+				rawMap[intervalKey] = dur
 			}
 		}
 	}