Question UnityWebRequest caches cookies between sessions in editor but not on Android device

Hi all,
I'm writing a game which includes an authentication process with my server using Django,
If the authentication is successful Django returns a set-cookie header with the session token and CORS token which is then set with all future UnityWebRequests from the app in that run.

On the editor if i exit play mode and than enter it again these cookies are sent again with every request and the server immediately recognizes that I'm an authenticated user with a valid session and doesn't reject my request but on an Android device the cookies are not cached when i'm re-running the app and when i try to request something from the server I get a 403 error code because Djange doesn't know I'm a authenticated user with a valid session.

Is there a known issue of Android not being able cache the cookies of a UnityWebRequest between sessions, if not, can someone please explain why this is working on Editor but not on an Android device?

I'm using Unity version 2020.3.3f

my code for sending the request is very straight forward:

Code (CSharp):

1. public static async UniTask<NetworkResponse> HttpGet(
2.             string url,
3.             [CanBeNull] Dictionary<string, string> parameters = null)
4.         {
5.             string formattedUrl = FormatURLParameters(url, parameters);
6.             UnityWebRequest getRequest = UnityWebRequest.Get(formattedUrl);
7.             getRequest.timeout = TimeOut;
8.            
9.             try
10.             {
11.                 await getRequest.SendWebRequest();
12.             }
13.             catch (Exception e)
14.             {
15.                 Debug.Log("an error occurred during HttpGet: " + e);
16.             }
17.  
18.             return HandleHTTPResponse(getRequest);
19.         }

Any help would be greatly appreciated,
Thanks in advance

 

Thanks so much for your reply, My app runs on iOS, Android and WebGL so for me Android is exception.

I just added functionality to my NetworkService that stores the cookies locally and adds them to the requests in the next session if I'm running on Android.

I now also see that what you are saying is at least partly stated in the documentation of UnityWebRequest.ClearCookieCache, but instead of reading it I just wasted a few hours figuring this out myself....

 

There seems to be a problem for me to set the cookie in the next session after i store the cookie locally.
here is my code to store the cookie in the local storage:

Code (CSharp):

1.         private static void SetCookiesInHash(bool saveCookies, IInfraConnector connector, UnityWebRequest request)
2.         {
3. #if UNITY_ANDROID && !UNITY_EDITOR
4.             if (saveCookies && request.GetResponseHeaders().TryGetValue("Set-Cookie", out string cookie))
5.             {
6.                 connector.SetCookie(request.uri.Host, cookie);
7.             }
8. #endif
9.         }

and here is my code to set the cookie in the request header:

Code (CSharp):

1. #if UNITY_ANDROID && !UNITY_EDITOR
2.             Dictionary<string, string> cookiesHash = connector.GetCookiesHash();
3.             if (cookiesHash.TryGetValue(request.uri.Host, out string cookie))
4.             {
5.                 request.SetRequestHeader("Cookie", cookie);
6.             }
7. #endif

but i still get a 403 unauthorized response from the server, any idea why this is happening?

 

Did any one find any solution to the problem? @TomerMatific

 

As written above I Implemented my own solution for Android, it is a bit more complicated than the solution I wrote here.
You need to extract only the actual cookie from the "Set-Cookie" header (without the metadata of expire date ext.).
It will only work if you know the exact cookie name you want to cache, than you can use a simple regex to extract the cookie.
Also I'm not sure if during the session more cookies from the same host are added what happens. still need to check that.

Code (CSharp):

1.  private static void SetCookiesInHash(List<string> saveCookiesList, IInfraConnector connector, UnityWebRequest request, string oldCookie)
2.         {
3.             if (saveCookiesList != null && request.GetResponseHeaders().TryGetValue("Set-Cookie", out string cookie))
4.             {
5. #if UNITY_ANDROID && !UNITY_EDITOR
6.                 try
7.                 {
8.                     string formatedCookie = string.IsNullOrEmpty(oldCookie) ? "" : oldCookie;
9.                     foreach (string cookieKey in saveCookiesList)
10.                     {
11.                         MatchCollection reg = Regex.Matches(cookie, $@"{cookieKey}=[^;]*");
12.                         if (reg.Count > 0)
13.                         {
14.                             formatedCookie+= cookieKey + "=" + reg[0].Value.Split('=')[1] + "; ";
15.                         }
16.                     }
17.                     if (!String.IsNullOrEmpty(formatedCookie))
18.                     {
19.                         connector.SetCookie(request.uri.Host, formatedCookie);//saves the actual cookie in the local storage
20.                     }
21.                 }
22.                 catch (Exception e)
23.                 {
24.                     Debug.Log("Could not extreact cookie from header");
25.                 }
26. #endif
27.             }
28.         }

Code (CSharp):

1.         private static string SetHashedCookiesInRequest(UnityWebRequest request, IInfraConnector connector)
2.         {
3. #if UNITY_ANDROID && !UNITY_EDITOR
4.             Dictionary<string, string> cookiesHash = connector.GetCookiesHash();
5.             if (cookiesHash.TryGetValue(request.uri.Host, out string cookie))
6.             {
7.                 request.SetRequestHeader("Cookie", cookie);
8.             }
9.             return cookie;
10. #endif
11.             return null;
12.         }

hope this helps

 

Thank you,
I do exact the same thing, some how when I set the header I get multiply calls in a loop to the server, did you encounter such behavior?

 

No sorry I did not