Feat: add preshared key check

middlewares/checkPresharedKey.go

@@ -0,0 +1,32 @@
+package middlewares
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/spf13/viper"
+	"github.com/uptrace/bunrouter"
+)
+
+func (self *Handlers) CheckPresharedKey(
+	next bunrouter.HandlerFunc,
+) bunrouter.HandlerFunc {
+	return func(w http.ResponseWriter, req bunrouter.Request) error {
+		authHeader := strings.Split(req.Header.Get("Authorization"), " ")
+		if len(authHeader) != 2 || authHeader[0] != "Bearer" {
+			return HTTPError{
+				StatusCode: http.StatusUnauthorized,
+				Message:    "missing preshared key",
+			}
+		}
+
+		if authHeader[1] != viper.GetString("preshared-key") {
+			return HTTPError{
+				StatusCode: http.StatusUnauthorized,
+				Message:    "preshared key mismatched",
+			}
+		}
+
+		return next(w, req)
+	}
+}