Xamarin oauth through WebView-CodePudding

I have been trying to implement google OAuth in Xamarin Forms App for a couple days. I have a pretty simple XAML code

<?xml version="1.0" encoding="utf-8" ?>

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         xmlns:local="clr-namespace:Google.ViewModels"
         x:Class="Google.MainPage">
<ContentPage.BindingContext>
    <local:MainPageViewModel/>
</ContentPage.BindingContext>
<StackLayout>
    <WebView Source="{Binding OAuthRequestUrl}" 
             VerticalOptions="FillAndExpand" 
             HorizontalOptions="FillAndExpand"/>
</StackLayout>

And ViewModel :

public string OAuthRequestUrl 
{ 
    get 
    {
        string oauthReuest = string.Format(
            "https://accounts.google.com/o/oauth2/v2/auth?client_id={0}&redirect_uri={1}&response_type={2}&scope={3}", 
            clientId, 
            redirectUrl, 
            responceType, 
            scope);
        return oauthReuest;
    } 
}

But after webview has been initialised I got 403: disalloed_useragent. Initially I had used Web Client Credentials and OAuth via browser postman completed successfully.

CodePudding user response：

You need to change the User Agent of the WebView control.

Unfortunately, this is not currently supported, but you will find some workarounds here: https://github.com/xamarin/Xamarin.Forms/issues/8432