Initial cloud-services repo - gateway service + pkg modules

pkg/utils/json_resp.go

@@ -0,0 +1,63 @@
+package utils
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+
+	"fiskerinc.com/modules/common"
+)
+
+// LinkResult makes result with link and timestamp
+func LinkResult(link string, timestamp int64) common.JSONLink {
+	return common.JSONLink{
+		Link:      link,
+		Timestamp: timestamp,
+	}
+}
+
+// ErrorResult makes error result
+func ErrorResult(status int, message string) common.JSONError {
+	return common.JSONError{
+		Error:   http.StatusText(status),
+		Message: message,
+	}
+}
+
+// RespJSON sends back JSON response
+func RespJSON(w http.ResponseWriter, status int, resp interface{}) {
+	js, _ := json.Marshal(resp)
+	w.Header().Set("Content-Type", "application/json")
+
+	// CORS headers for local debugging
+	/*
+		w.Header().Set("Access-Control-Allow-Credentials", "true")
+		w.Header().Set("Access-Control-Allow-Headers", "*")
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "*")
+	*/
+
+	w.WriteHeader(status)
+	w.Write(js)
+}
+
+// RespLink JSON response with download link
+func RespLink(w http.ResponseWriter, link string, timestamp int64) {
+	resp := LinkResult(link, timestamp)
+	RespJSON(w, http.StatusOK, &resp)
+}
+
+// RespError JSON error response
+func RespError(w http.ResponseWriter, status int, message string) {
+	resp := ErrorResult(status, message)
+	RespJSON(w, status, &resp)
+}
+
+// Forward a response
+func ForwardResponse(w http.ResponseWriter, resp *http.Response) {
+	w.Header().Set("Content-Type", resp.Header.Get("Content-Type"))
+	w.WriteHeader(resp.StatusCode)
+
+	body, _ := ioutil.ReadAll(resp.Body)
+	w.Write(body)
+}