✨ add i18n support

common/i18n/keys.go

@@ -0,0 +1,21 @@
+package i18n
+
+const I18nKey = "i18n"
+const I18nCurrentLangKey = "lang"
+
+var (
+	defaultLangHeaderKey        = "Accept-Language"
+	defaultErrCode       uint32 = 10001
+)
+
+// SetDefaultLangHeaderKey sets the default value of the lang header key.
+// need to be set before use
+func SetDefaultLangHeaderKey(key string) {
+	defaultLangHeaderKey = key
+}
+
+// SetDefaultErrCode sets the default value of the err code.
+// need to be set before use
+func SetDefaultErrCode(code uint32) {
+	defaultErrCode = code
+}