在本机 iOS 应用程序中从 web 视图进行身份验证？

Question

I have a web backend server that handles web site (html) authentication from email, facebook, google....

Is it a possible option to load the authentication web form into a native web view, intercept the authentication response by native app, and store login state into native app, so the native app will be able then to send REST authorized queries to the backend server?

Is this scenario possible?

Answer 1

Yes it is possible using WKWebView. It has navigation delegate API

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler

Using the above API, you can check for access token which is coming via cookie.

Objective-c

 WKWebsiteDataStore *dataStore = webView.configuration.websiteDataStore;
 WKHTTPCookieStore *cookieStore = dataStore.httpCookieStore;
 [cookieStore getAllCookies:^(NSArray<NSHTTPCookie*> *cookieArray) {

      NSString *cookieValue = nil;
      for (NSHTTPCookie *cookie in cookieArray) {

            if ([cookie.name isEqualToString:@"access_token"]) {
                 NSString *accessToken = cookie.value;
                }
            }
}];

Swift

let dataStore = webView.configuration.websiteDataStore
let cookieStore = dataStore.httpCookieStore
cookieStore.getAllCookies({ cookieArray in

let cookieValue: String? = nil
for cookie in cookieArray ?? [] {

    if (cookie.name == "access_token") {
        let accessToken = cookie.value
    }
}

})

This is what I'm doing in our project. Hope this helps you.