How to store and restore cookies in a native web view?

Problem Understanding

The issue occurs because cookies in the native web view aren't being persisted between app sessions, while Web Storage data is preserved. This is a common challenge when working with web views in Tizen applications.

Solution Methods

1. Using EWebKit Cookie Management APIs:

   • Utilize the EWebKit Cookie Manager functions to properly handle cookie persistence
   • Key functions to use:
     • ewk_cookie_manager_persistent_storage_set()
     • Ewk_Cookie_Persistent_Storage
     • Ewk_Cookie_Accept_Policy

2. JavaScript Workaround:

   • Save cookies to LocalStorage via JavaScript when the app is running
   • Read from LocalStorage and recreate cookies when the app starts
   • This approach provides a reliable alternative when native cookie persistence fails

Code Examples

For the native API solution, you would need to implement something like:

// Get the cookie manager
Ewk_Cookie_Manager* cookie_manager = ewk_context_cookie_manager_get(ewk_view_context_get(web_view));

// Set persistent storage
ewk_cookie_manager_persistent_storage_set(cookie_manager, "/path/to/cookie/file", EWK_COOKIE_PERSISTENT_STORAGE_TEXT);

For the JavaScript workaround:

// Save cookies to localStorage
document.cookie.split(';').forEach(cookie => {
    const [name, value] = cookie.split('=');
    localStorage.setItem(`cookie_${name.trim()}`, value);
});

// Restore cookies from localStorage
Object.keys(localStorage).forEach(key => {
    if (key.startsWith('cookie_')) {
        const name = key.substring(7);
        document.cookie = `${name}=${localStorage.getItem(key)}`;
    }
});

Additional Tips

• Ensure your app has proper storage permissions in the manifest
• Test cookie persistence thoroughly as behavior might vary across Tizen versions
• Consider security implications when storing sensitive data in cookies