use websocket authentication & refactor.

internal/utils/http.go

@@ -0,0 +1,76 @@
+package utils
+
+import (
+	"fmt"
+	"net/http"
+	"encoding/json"
+)
+
+type ErrResponse struct {
+	Message string `json:"message"`
+}
+
+func HttpJsonRequest(w http.ResponseWriter, r *http.Request, res interface{}) bool {
+	if err := json.NewDecoder(r.Body).Decode(res); err != nil {
+		HttpBadRequest(w, err)
+		return false
+	}
+
+	return true
+}
+
+func HttpJsonResponse(w http.ResponseWriter, status int, res interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+
+	if err := json.NewEncoder(w).Encode(res); err != nil {
+		// TODO: Log.
+		//log.Warn().Err(err).Msg("failed writing json error response")
+	}
+}
+
+func HttpError(w http.ResponseWriter, status int, res interface{}) {
+	HttpJsonResponse(w, status, &ErrResponse{
+		Message: fmt.Sprint(res),
+	})
+}
+
+func HttpSuccess(w http.ResponseWriter, res ...interface{}) {
+	if len(res) == 0 {
+		w.WriteHeader(http.StatusNoContent)
+	} else {
+		HttpJsonResponse(w, http.StatusOK, res[0])
+	}
+}
+
+func HttpBadRequest(w http.ResponseWriter, res ...interface{}) {
+	defHttpError(w, http.StatusBadRequest, "Bad Request.", res...)
+}
+
+func HttpNotAuthenticated(w http.ResponseWriter, res ...interface{}) {
+	defHttpError(w, http.StatusUnauthorized, "Invalid or missing access token.", res...)
+}
+
+func HttpNotAuthorized(w http.ResponseWriter, res ...interface{}) {
+	defHttpError(w, http.StatusForbidden, "Access token does not have the required scope.", res...)
+}
+
+func HttpNotFound(w http.ResponseWriter, res ...interface{}) {
+	defHttpError(w, http.StatusNotFound, "Resource not found.", res...)
+}
+
+func HttpUnprocessableEntity(w http.ResponseWriter, res ...interface{}) {
+	defHttpError(w, http.StatusUnprocessableEntity, "Unprocessable Entity.", res...)
+}
+
+func HttpInternalServer(w http.ResponseWriter, res ...interface{}) {
+	defHttpError(w, http.StatusInternalServerError, "Internal server error.", res...)
+}
+
+func defHttpError(w http.ResponseWriter, status int, text string, res ...interface{}) {
+	if len(res) == 0 {
+		HttpError(w, status, text)
+	} else {
+		HttpError(w, status, res[0])
+	}
+}