On the Android platform, it's impossible to obtain cookies via CookieManager in some lower - version systems.

[lifei]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

I've encountered a very strange phenomenon. With the same code and the same APK package, there are significant differences in behavior between the emulator with API 28, the emulator with API 34, and the real device (Android 14). In short, the CookieManager.instance().getCookies function fails to retrieve the WebView cookies on the API 28 emulator, but there is no such problem on the API 34 emulator and the real device.

Expected Behavior

The expectation is to be able to obtain cookies through code, just like on a real device.

Steps with code example to reproduce

Steps with code example to reproduce

final iaw.CookieManager cookieManager = iaw.CookieManager.instance();
final cookieJar = CookieJar();
final dio = Dio();
const baseUrl = "";
const cookieDomain = "";

Future InitDio() async {
  dio.interceptors.add(dcm.CookieManager(cookieJar));
  await UpdateCookie();
}

Future UpdateCookie({iaw.InAppWebViewController? webController = null}) async {
  var cookies = await cookieManager.getCookies(
      url: iaw.WebUri(cookieDomain), webViewController: webController);
  log("cookies count: ${cookies.length}");
  await cookieJar.saveFromResponse(
      Uri.parse(cookieDomain),
      cookies.map((cookie) {
        var c = new Cookie(cookie.name, cookie.value);
        c.path = cookie.path;
        c.domain = cookie.domain;
        c.sameSite = SameSite.lax;
        c.secure = cookie.isSecure ?? true;
        c.maxAge = cookie.expiresDate;
        c.httpOnly = cookie.isHttpOnly ?? false;
        log("update cookie: ${cookie.name}");
        return c;
      }).toList());
}

Stacktrace/Logs

Stacktrace/Logs

cookies count: 0

Flutter version

v3.27.3

Operating System, Device-specific and/or Tool

• Android emulator API 28 ❌
• Android emulator API 34 ✔
• XIaomi Mix Fold 3 Android Version 14 ✔

Plugin version

v6.1.5, v6.2.0-beta.1

Additional information

No response

Self grab

• I'm ready to work on this issue!

[lifei]

I have done some research on this issue and found that in a good scenario it prints here1 and in a bad scenario it prints here2.

  public List<Map<String, Object>> getCookies(final String url) {

    final List<Map<String, Object>> cookieListMap = new ArrayList<>();

    cookieManager = getCookieManager();
    if (cookieManager == null) return cookieListMap;

    List<String> cookies = new ArrayList<>();
    if (WebViewFeature.isFeatureSupported(WebViewFeature.GET_COOKIE_INFO)) {
      Log.i(LOG_TAG, "here1");
      cookies = CookieManagerCompat.getCookieInfo(cookieManager, url);
    } else {
      Log.i(LOG_TAG, "here2");
      String cookiesString = cookieManager.getCookie(url);
      if (cookiesString != null) {
        cookies = Arrays.asList(cookiesString.split(";"));
      }
    }

[lifei]

#2392 maybe this issue is the same problem.

[lifei]

I tried flutter_webview and I failed.

[lifei]

Finally, I found that SameSite:Lax is the key reason, even I passed controller to getCookie method.

[lifei]

Well, I find a link https://stackoverflow.com/questions/65812748/cookiemanager-getcookie-always-returns-null-version-api-28-pie, it said that there was a bug in google 28 image, https://bugs.chromium.org/p/chromium/issues/detail?id=780491.
then I tested it in google 29 image, and I worked fine.