Flutter dio进行网络请求headers中key值都变成小写了

Question

使用Flutter dio进行网络请求，headers中的参数都被被转成小写，传给后台
例如：

dio.options.headers["Authorization"] = "Basic <对应 token>";

接口请求中Authorization会自动变成authorization

如何不让请求中的headers中的值变成小写呢？

Answer 1

/// HTTP request headers.
///
/// The keys of the header are case-insensitive,
/// e.g.: content-type and Content-Type will be treated as the same key.
Map<String, dynamic>? headers;

header的key是不区分大小写的