Sessions are not saved

[MakiK777]

After logging in to a site, I restart the application, it will be logged out.
When I checked the corresponding page from the web browser, I found that the session ID was issued, and that this controls the login status.
The email address you used to log in remains in the input field on the login page, so it seems that cookies are saved but sessions are not saved.
It only happens on iOS. (Login is maintained on Android)
Since the connection destination is an external site, I cannot edit the web page.
Are there any measures?

Unity 2019.4.2f1
iPhone7(iOS 13.0), iPhoneXS(iOS13.4)

[KojiNakamaru]

The email address you described might be stored not as cookies but in local storage, thus might work without any issue. WKWebView caches cookies on memory and doesn't guarantee to save them, so I added experimental SaveCookies() in #561. Though I've not tested the code, could you please try it?

[MakiK777]

Thank you for your reply.
I tried SaveCookies(), but the results have not changed.

I also tried Debug.Log( webView.GetCookies("https://~~~/") );.
Then, cookies are stored, but the session is not included.

[KojiNakamaru]

Hmm, how about Debug.Log( webView.GetCookies("https://~~~/") ) for android? Could you please provide the output for both platform (of course please hide security information with asterisks)?

[MakiK777]

iOS

_ga=GA1.3.828811705.***; Domain=.example.co.jp; Path=/; Expires=Wed, 27 Jul 2022 13:22:46 GMT+9; Version=0
_gid=GA1.3.726318346.***; Domain=.example.co.jp; Path=/; Expires=Tue, 28 Jul 2020 13:22:46 GMT+9; Version=0
MB_MRXXANSY=6b6f***; Domain=www.example.co.jp; Path=/; Expires=Wed, 26 Aug 2020 13:22:12 GMT+9; Version=0
SERVICENAME_CUST[login_customer_name01]=***; Domain=www.example.co.jp; Path=/; Expires=Wed, 26 Aug 2020 13:22:12 GMT+9; Version=0
SERVICENAME_CUST[login_customer_point]=0; Domain=www.example.co.jp; Path=/; Expires=Wed, 26 Aug 2020 13:22:12 GMT+9; Version=0
R_CUSTOMER=6b6f***; Domain=www.example.co.jp; Path=/; Expires=Wed, 26 Aug 2020 13:22:12 GMT+9; Version=0
_rt.uid=6b6f***; Domain=.example.co.jp; Path=/; Expires=Thu, 28 Jul 2022 13:22:31 GMT+9; Version=0
_rt.xd=1a30***; Domain=.example.co.jp; Path=/; Expires=Tue, 28 Jul 2020 12:22:31 GMT+9; Version=0
SERVICENAME_id=***%40gmail.com; Domain=www.example.co.jp; Path=/; Expires=Tue, 27 Jul 2021 13:22:25 GMT+9; Version=0
SERVICENAME_CHECK_NEWS=1; Domain=www.example.co.jp; Path=/; Expires=Mon, 27 Jul 2020 14:21:46 GMT+9; Version=0
SERVICENAME_CHECK_NEWS_SP=1; Domain=www.example.co.jp; Path=/; Expires=Mon, 27 Jul 2020 14:21:46 GMT+9; Version=0
SERVICENAME_CHECK_SHOP=1; Domain=www.example.co.jp; Path=/; Expires=Mon, 27 Jul 2020 14:21:46 GMT+9; Version=0
SERVICENAME_CS_CHECK_NEWS=1; Domain=www.example.co.jp; Path=/; Expires=Mon, 27 Jul 2020 14:21:46 GMT+9; Version=0
WebViewController:Start()
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)

Android

_ga=GA1.3.483230703.***;
ECSESSID=***;
SERVICENAME_CUST[login_customer_name01]=***;
SERVICENAME_CUST[login_customer_point]=0;
R_CUSTOMER=d6c8f***;
MB_MRXXANSY=d6c8***;
_rt.uid=d6c8***;
SERVICENAME_CHECK_NEWS=1;
SERVICENAME_CHECK_NEWS_SP=1;
SERVICENAME_CHECK_SHOP=1;
SERVICENAME_CS_CHECK_NEWS=1;
_gid=GA1.3.103723172.***;
_gat=1;
SERVICENAME_id=***%40gmail.com
(Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)

ECSESSID is the desired session ID.

[KojiNakamaru]

Thank you for logs. Starting from them, I checked various articles about WKWebView and session cookies, and implemented an experimental code in #574. You can get modified WebViewObject.cs and WebView.mm from the branch. In order to actually save/restore a session cookie, please refer changes of SampleWebView.cs.

[MakiK777]

Thank you for your support.
I changed it to this script and it worked properly.