小贝子编程

Xamarin.Forms Web视图进行身份验证，导航到新页面(Shell)并需要再次进行身份验证



我在Shell Xamarin.Forms应用程序中有一个网络视图。我请求一个安全页面，并被转发到我的公司SSO(单一登录(，我通过它可以看到安全内容。

网络视图：

<WebView x:Name="web1" HorizontalOptions="CenterAndExpand"
VerticalOptions="FillAndExpand" HeightRequest="1000" WidthRequest="1000"/>

然后，当我从主菜单导航到一个新的Shell页面时，或者通过点击列表视图中的一个项目(想想RSS标题列表，点击阅读文章(，该项目在xaml页面上具有几乎相同的WebView标记，在页面构造函数上将Source设置为安全页面，或者覆盖OnAppearing，期望会话/cookie仍然处于活动状态，我会再次被转发到登录页面。

有没有办法让任何人知道我可以确保我的应用程序(iOS和Android(中的所有网络视图都使用相同的会话，这样用户只需登录一次。

我已经尝试在app.xaml.cs文件中创建一个网络视图，并使用Content.Children.Add(App.Web1)将其添加到我的页面中，在我的简单想法中，这应该意味着我在所有页面上使用相同的网络视图，因此使用相同的会话！？但这似乎也不起作用。

我们非常感谢所有的帮助。

谢谢。

使用cookieJs和正常的cookie插入方法可以解决在前端设置cookie的问题：

CookieJs:

!function(e){var n;if("function"==typeof define&&define.amd&&(define(e),n=!0),"object"==typeof exports&&(module.exports=e(),n=!0),!n){var t=window.Cookies,o=window.Cookies=e();o.noConflict=function(){return window.Cookies=t,o}}}(function(){function e(){for(var e=0,n={};e<arguments.length;e++){var t=arguments[e];for(var o in t)n[o]=t[o]}return n}function n(e){return e.replace(/(%[0-9A-Z]{2})+/g,decodeURIComponent)}return function t(o){function r(){}function i(n,t,i){if("undefined"!=typeof document){"number"==typeof(i=e({path:"/"},r.defaults,i)).expires&&(i.expires=new Date(1*new Date+864e5*i.expires)),i.expires=i.expires?i.expires.toUTCString():"";try{var c=JSON.stringify(t);/^[{[]/.test(c)&&(t=c)}catch(e){}t=o.write?o.write(t,n):encodeURIComponent(String(t)).replace(/%(23|24|26|2B|3A|3C|3E|3D|2F|3F|40|5B|5D|5E|60|7B|7D|7C)/g,decodeURIComponent),n=encodeURIComponent(String(n)).replace(/%(23|24|26|2B|5E|60|7C)/g,decodeURIComponent).replace(/[()]/g,escape);var f="";for(var u in i)i[u]&&(f+="; "+u,!0!==i[u]&&(f+="="+i[u].split(";")[0]));return document.cookie=n+"="+t+f}}function c(e,t){if("undefined"!=typeof document){for(var r={},i=document.cookie?document.cookie.split("; "):[],c=0;c<i.length;c++){var f=i[c].split("="),u=f.slice(1).join("=");t||'"'!==u.charAt(0)||(u=u.slice(1,-1));try{var a=n(f[0]);if(u=(o.read||o)(u,a)||n(u),t)try{u=JSON.parse(u)}catch(e){}if(r[a]=u,e===a)break}catch(e){}}return e?r[e]:r}}return r.set=i,r.get=function(e){return c(e,!1)},r.getJSON=function(e){return c(e,!0)},r.remove=function(n,t){i(n,"",e(t,{expires:-1}))},r.defaults={},r.withConverter=t,r}(function(){})});

样品：

iOS渲染器：

public class DefaultWebViewRenderer : ViewRenderer<CustomWebView, WKWebView>, IWKScriptMessageHandler, IWKNavigationDelegate
{
const string JavaScriptFunction = "function invokeCSharpAction(data){window.webkit.messageHandlers.invokeAction.postMessage(data);}";        
const string cookieJs = "!function(e){var n;if("function"==typeof define&&define.amd&&(define(e),n=!0),"object"==typeof exports&&(module.exports=e(),n=!0),!n){var t=window.Cookies,o=window.Cookies=e();o.noConflict=function(){return window.Cookies=t,o}}}(function(){function e(){for(var e=0,n={};e<arguments.length;e++){var t=arguments[e];for(var o in t)n[o]=t[o]}return n}function n(e){return e.replace(/(%[0-9A-Z]{2})+/g,decodeURIComponent)}return function t(o){function r(){}function i(n,t,i){if("undefined"!=typeof document){"number"==typeof(i=e({path:"/"},r.defaults,i)).expires&&(i.expires=new Date(1*new Date+864e5*i.expires)),i.expires=i.expires?i.expires.toUTCString():"";try{var c=JSON.stringify(t);/^[\{\[]/.test(c)&&(t=c)}catch(e){}t=o.write?o.write(t,n):encodeURIComponent(String(t)).replace(/%(23|24|26|2B|3A|3C|3E|3D|2F|3F|40|5B|5D|5E|60|7B|7D|7C)/g,decodeURIComponent),n=encodeURIComponent(String(n)).replace(/%(23|24|26|2B|5E|60|7C)/g,decodeURIComponent).replace(/[\(\)]/g,escape);var f="";for(var u in i)i[u]&&(f+="; "+u,!0!==i[u]&&(f+="="+i[u].split(";")[0]));return document.cookie=n+"="+t+f}}function c(e,t){if("undefined"!=typeof document){for(var r={},i=document.cookie?document.cookie.split("; "):[],c=0;c<i.length;c++){var f=i[c].split("="),u=f.slice(1).join("=");t||'"'!==u.charAt(0)||(u=u.slice(1,-1));try{var a=n(f[0]);if(u=(o.read||o)(u,a)||n(u),t)try{u=JSON.parse(u)}catch(e){}if(r[a]=u,e===a)break}catch(e){}}return e?r[e]:r}}return r.set=i,r.get=function(e){return c(e,!1)},r.getJSON=function(e){return c(e,!0)},r.remove=function(n,t){i(n,"",e(t,{expires:-1}))},r.defaults={},r.withConverter=t,r}(function(){})});";
WKUserContentController userController;
public DefaultWebViewRenderer()
{
}
protected override void OnElementChanged(ElementChangedEventArgs<CustomWebView> e)
{
base.OnElementChanged(e);
if (Control == null && e.OldElement == null)
{
userController = new WKUserContentController();
var cookieValue = string.Empty; //Whatever you want
var jsScript = new WKUserScript(new NSString(cookieJs), WKUserScriptInjectionTime.AtDocumentStart, false);
var yourCookie = new WKUserScript(new NSString("Cookies.set('CookieKey','" + cookieValue + "',{expires : 30, domain : '.yourdomain.com' })"), WKUserScriptInjectionTime.AtDocumentStart, false);                  
userController.AddUserScript(jsScript);
userController.AddUserScript(yourCookie);                    
var script = new WKUserScript(new NSString(JavaScriptFunction), WKUserScriptInjectionTime.AtDocumentEnd, false);
userController.AddUserScript(script);
userController.AddScriptMessageHandler(this, "invokeAction");
var config = new WKWebViewConfiguration { UserContentController = userController };
var webView = new WKWebView(Frame, config);
SetNativeControl(webView);
}
if (e.OldElement != null)
{
userController.RemoveAllUserScripts();
userController.RemoveScriptMessageHandler("invokeAction");
}
if (e.NewElement != null)
{
if (Element.Source is UrlWebViewSource urlSource)
{
var url = new NSUrl(urlSource.Url);
var storage = NSHttpCookieStorage.SharedStorage;
storage.AcceptPolicy = NSHttpCookieAcceptPolicy.Always;
var request = new NSMutableUrlRequest(url);
Control.LoadRequest(request);
}
else if (Element.Source is HtmlWebViewSource htmlSource)
{
Control.LoadHtmlString(htmlSource.Html, null);
}
}
}
public void DidReceiveScriptMessage(WKUserContentController userContentController, WKScriptMessage message)
{
Element.JavascriptBridgeInvoked(message.Body.ToString());
}
}

安卓渲染器：

public class DefaultWebViewRenderer : WebViewRenderer
{
const string JavaScriptFunction = "function invokeCSharpAction(data){jsBridge.invokeAction(data);}";
public DefaultWebViewRenderer(Context context) : base(context)
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.WebView> e)
{
base.OnElementChanged(e);
if (Control != null && e.NewElement is CustomWebView webView)
{
Control.SetWebViewClient(new WebViewTestClient());
Control.ClearSslPreferences();
Control.Settings.SetAppCacheEnabled(false); 
Control.Settings.DatabaseEnabled = true;
Control.Settings.DomStorageEnabled = true;
Control.Settings.AllowFileAccessFromFileURLs = true;
Control.Settings.AllowUniversalAccessFromFileURLs = true;
Control.Settings.CacheMode = Android.Webkit.CacheModes.NoCache;                
Control.Settings.AllowContentAccess = true;
Control.Settings.AllowFileAccess = true;
Control.Settings.JavaScriptEnabled = true;
Control.Settings.JavaScriptCanOpenWindowsAutomatically = true;
var cookieManager = CookieManager.Instance;
cookieManager.SetAcceptCookie(true);
cookieManager.SetAcceptThirdPartyCookies(Control, true);
try
{
Control.SetDownloadListener(new DownloadListener());
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
if (e.OldElement != null)
{
Control.RemoveJavascriptInterface("jsBridge");
}
Control.AddJavascriptInterface(new JSBridge(this), "jsBridge");
InjectJS(JavaScriptFunction);
if (webView.Source is UrlWebViewSource webSource)
{
Control.LoadUrl(webSource.Url);
}
}
}
private void InjectJS(string script)
{
if (Control != null)
{
Control.LoadUrl(string.Format("javascript: {0}", script));
}
}
}
public class WebViewTestClient : WebViewClient
{
public override void OnPageStarted(Android.Webkit.WebView view, string url, Bitmap favicon)
{
var cookieJs = "!function(e){var n;if("function"==typeof define&&define.amd&&(define(e),n=!0),"object"==typeof exports&&(module.exports=e(),n=!0),!n){var t=window.Cookies,o=window.Cookies=e();o.noConflict=function(){return window.Cookies=t,o}}}(function(){function e(){for(var e=0,n={};e<arguments.length;e++){var t=arguments[e];for(var o in t)n[o]=t[o]}return n}function n(e){return e.replace(/(%[0-9A-Z]{2})+/g,decodeURIComponent)}return function t(o){function r(){}function i(n,t,i){if("undefined"!=typeof document){"number"==typeof(i=e({path:"/"},r.defaults,i)).expires&&(i.expires=new Date(1*new Date+864e5*i.expires)),i.expires=i.expires?i.expires.toUTCString():"";try{var c=JSON.stringify(t);/^[\{\[]/.test(c)&&(t=c)}catch(e){}t=o.write?o.write(t,n):encodeURIComponent(String(t)).replace(/%(23|24|26|2B|3A|3C|3E|3D|2F|3F|40|5B|5D|5E|60|7B|7D|7C)/g,decodeURIComponent),n=encodeURIComponent(String(n)).replace(/%(23|24|26|2B|5E|60|7C)/g,decodeURIComponent).replace(/[\(\)]/g,escape);var f="";for(var u in i)i[u]&&(f+="; "+u,!0!==i[u]&&(f+="="+i[u].split(";")[0]));return document.cookie=n+"="+t+f}}function c(e,t){if("undefined"!=typeof document){for(var r={},i=document.cookie?document.cookie.split("; "):[],c=0;c<i.length;c++){var f=i[c].split("="),u=f.slice(1).join("=");t||'"'!==u.charAt(0)||(u=u.slice(1,-1));try{var a=n(f[0]);if(u=(o.read||o)(u,a)||n(u),t)try{u=JSON.parse(u)}catch(e){}if(r[a]=u,e===a)break}catch(e){}}return e?r[e]:r}}return r.set=i,r.get=function(e){return c(e,!1)},r.getJSON=function(e){return c(e,!0)},r.remove=function(n,t){i(n,"",e(t,{expires:-1}))},r.defaults={},r.withConverter=t,r}(function(){})});";
var cookieValue = string.Empty; //Whatever you want
view.EvaluateJavascript(cookieJs, null);
view.EvaluateJavascript("Cookies.set('CookieKey','" + cookieValue + "',{expires : 30, domain : '.yourdomain.com' })", null);
base.OnPageStarted(view, url, favicon);
view.ClearCache(true);
}
public override void OnPageFinished(Android.Webkit.WebView view, string url)
{
base.OnPageFinished(view, url);
view.ClearCache(true);
}
public override void OnReceivedSslError(Android.Webkit.WebView view, SslErrorHandler handler, SslError error)
{
handler.Proceed();
base.OnReceivedSslError(view, handler, error);
}
}
public class DownloadListener : Java.Lang.Object, Android.Webkit.IDownloadListener
{
public DownloadListener()
{
}
public void OnDownloadStart(string url, string userAgent, string contentDisposition, string mimetype, long contentLength)
{
if (string.IsNullOrEmpty(url) || !Uri.TryCreate(url, UriKind.RelativeOrAbsolute, out _))
return;
try
{
if (HasPermissions())
{
Android.Net.Uri contentUri = Android.Net.Uri.Parse(url);
DownloadManager.Request request = new DownloadManager.Request(contentUri);
request.SetMimeType(mimetype);
var cookies = Android.Webkit.CookieManager.Instance.GetCookie(url);
request.AddRequestHeader("cookie", cookies);
request.AddRequestHeader("User-Agent", userAgent);
request.SetDescription("Downloading file...");
request.SetTitle(Android.Webkit.URLUtil.GuessFileName(url, contentDisposition, mimetype));
request.AllowScanningByMediaScanner();
request.SetNotificationVisibility(Android.App.DownloadVisibility.VisibleNotifyCompleted);
request.SetDestinationInExternalPublicDir(Android.OS.Environment.DirectoryDownloads, ".pdf");
Android.App.DownloadManager dm = (Android.App.DownloadManager)CrossCurrentActivity.Current.Activity.GetSystemService(Android.Content.Context.DownloadService);
dm.Enqueue(request);
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
private static bool HasPermissions()
{
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.M)
{
string[] WriteLocation =
{
Android.Manifest.Permission.WriteExternalStorage,
Android.Manifest.Permission.ReadExternalStorage
};
var perm = CrossCurrentActivity.Current.AppContext.CheckSelfPermission(Android.Manifest.Permission.WriteExternalStorage);
if (perm != (int)Android.Content.PM.Permission.Granted)
{
CrossCurrentActivity.Current.Activity.RequestPermissions(WriteLocation, 2);
return false;
}
else
{
return true;
}
}
else
{
return true;
}
}
}
public class JSBridge : Java.Lang.Object
{
private readonly WeakReference<DefaultWebViewRenderer> hybridWebViewRenderer;
public JSBridge(DefaultWebViewRenderer hybridRenderer)
{
hybridWebViewRenderer = new WeakReference<DefaultWebViewRenderer>(hybridRenderer);
}
[JavascriptInterface]
[Export("invokeAction")]
public void InvokeAction(string data)
{
if (hybridWebViewRenderer != null && hybridWebViewRenderer.TryGetTarget(out DefaultWebViewRenderer hybridRenderer) && hybridRenderer != null && hybridRenderer.Element is CustomWebView webView)
{
webView.JavascriptBridgeInvoked(data);
}
}
}

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