如何在 Flutter GET Api 请求中添加多个标头答案

【问题标题】：How can I add multiple headers in Flutter GET Api request如何在 Flutter GET Api 请求中添加多个标头
【发布时间】：2019-07-16 06:57:45
【问题描述】：

如何在 Flutter API 的标头中添加 set-cookie。我使用了以下 dart 插件：

Dart Plugin

我正在关注这些链接，但无法添加标题。

Flutter Cookbook

Stackoverflow Question

以下是我的代码：

Future<Map> getApi() async {

    Map<String, String> headers = {};

    // HEADERS TO BE ADDED
    headers['Set-Cookie'] = "user_image=; Path=/";
    headers['Set-Cookie'] = "user_id=Administrator; Path=/";
    headers['Set-Cookie'] = "system_user=yes; Path=/";
    headers['Set-Cookie'] = "full_name=Administrator; Path=/";
    headers['Set-Cookie'] = "sid=123456789; Expires=Mon, 25-Feb-2019 11:01:39 GMT; Path=/";

    // API RESPONSE
    http.Response response = await http.get(
      apiUrl,
      headers: headers,
    );

    // CONVERT TO JSON AND MAP
    Map responseBody = convert.jsonDecode(response.body);

    return responseBody;
  }

【问题讨论】：

标签： http cookies dart flutter http-headers

【解决方案1】：

这应该做你想做的事

  HttpClient client = HttpClient();
  final request = await client.getUrl(Uri.parse("http://www.example.com/"));
  request.cookies
    ..add((Cookie('user_image', '')..path = '/'))
    ..add((Cookie('user_id', 'Administrator')..path = '/'))
    ..add((Cookie('system_user', 'yes')..path = '/'))
    ..add((Cookie('full_name', 'Administrator')..path = '/'))
    ..add((Cookie('sid', '123456789')..path = '/')
      ..expires = DateTime.utc(2019, 2, 25, 11, 01, 39));
  //request.write(...)
  final response = await request.close();

【讨论】：

未处理异常：\n错误状态：Stream 已被监听。

【解决方案2】：

这应该工作;

HttpClient client = HttpClient();
    final request = await client.send(http.Request("GET", Uri.parse("http://www.example.com/"))
            ..headers['Set-Cookie'] = "user_image=; Path=/"
            ..headers['Set-Cookie'] = "user_id=Administrator; Path=/"
            ..headers['Set-Cookie'] = "system_user=yes; Path=/"
            ..headers['Set-Cookie'] = "full_name=Administrator; Path=/"
            ..headers['Set-Cookie'] = "sid=123456789; Expires=Mon, 25-Feb-2019 11:01:39 GMT; Path=/"

【讨论】：

错误：没有为类 HttpClient 定义“发送”方法。

【解决方案3】：

借助link 上给出的解决方案，我能够解决我的问题。以下是添加标头的 HTTP 请求：

http.Response response = await http.get(
   apiUrl,
   headers: {'Cookie': 'sid=123456789'},
);

感谢大家的帮助。

【讨论】：