Javascript React Native 项目中的 Fetch API 无法捕获带有redirect： 'manual'的重定向

我在我的Reaction Native项目中使用了Fetch API.我向服务器发出HTTP POST请求，该服务器需要用户名和密码.如果登录成功，服务器在登录页面中设置会话cookie，然后重定向到另一个名为博客的网页.Fetch API收到来自博客的响应，该博客没有会话cookie.因此，我需要在重定向发生之前捕获重定向并存储会话cookie.

在文件中，它说redirect: 'manual'个人应该可以完成这项工作.然而，我还是从最后一页得到了回复.Fetch API-response.redirected返回undefined看不到重定向.但是请求和响应的URL是不同的.潜在的问题可能出在哪里？

const url = 'url of a website ( cannot show it to you )';
// login request
const login = (profileName, password) => {
  const details = {
    benutzername: profileName,
    passwort: password,
  };

  const formBody = Object.keys(details)
    .map((key) => `${encodeURIComponent(key)}=${encodeURIComponent(details[key])}`)
    .join('&');

  console.log(`formBody to be sent: ${formBody}`);

  fetch(url, {
    method: 'POST',
    headers: {
      Accept:
        'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7',
      'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: formBody,
    redirect: 'manual',
  })
    .then((response) => {
      console.log('! response type !');
      console.log(response.type);
      console.log('! is redirected !');
      console.log(response.redirected);
      console.log('! response console log !');
      console.log(response.url);
      console.log('! response status console log !');
      console.log(response.status);
      return response.headers;
    })
    .then((headers) => {
      console.log('! headers for each !');
      headers.forEach((value, key) => {
        console.log(`${key} ==> ${value}`);
      });
      return headers;
    })
    .catch((error) => console.log(`error: ${error}`));
};

export { login };

以下是浏览器中的网络活动截图:

Login:

Blog:

以下是日志(log):

LOG  ! response type !
 LOG  default
 LOG  ! is redirected !
 LOG  undefined
 LOG  ! response console log !
 LOG  https://.../Blog.xhtml?faces-redirect=true&dswid=-8890
 LOG  ! response status console log !
 LOG  200
 LOG  ! headers for each !
 LOG  cache-control ==> no-cache, no-store, must-revalidate
 LOG  content-encoding ==> gzip
 LOG  content-type ==> text/html;charset=UTF-8
 LOG  date ==> Sun, 23 Jul 2023 14:54:59 GMT
 LOG  expires ==> 0
 LOG  pragma ==> no-cache
 LOG  server ==> Apache
 LOG  set-cookie ==> dsrwid--8890=-8890; path=/; secure; Max-Age=60; Expires=Sun, 23-Jul-2023 14:55:59 GMT; SameSite=None
 LOG  vary ==> Accept-Encoding