Xamarin中的WebException,使用HttpClient

Question

我正在学习如何在C#中使用xamarin,并且我有一个Android应用程序来向外部API发出Web请求,并且我收到以下错误;

System.Net.Http.HttpRequestException: An error occurred while sending the 
request ---> System.Net.WebException: Error: SecureChannelFailure (The   
authentication or decryption has failed.) ---> System.IO.IOException: The 
authentication or decryption has failed. ---> System.IO.IOException: The 
authentication or decryption has failed. ---> 
Mono.Security.Protocol.Tls.TlsException: The authentication or decryption has failed.

我的代码如下;

public async Task<List<T>> GetList<T>(string url)
    {
        HttpClient client = new HttpClient();
        var response = await client.GetAsync(new Uri(url));
        response.EnsureSuccessStatusCode();
        var content = await response.Content.ReadAsStringAsync();
        return JsonConvert.DeserializeObject<List<T>>(content);
    }

android中的MainClass调用核心类,它调用此服务类.

HttpClient的请求时,API不工作,不使用HTTPS,但每当我使用已启用HTTPS的API抛出此错误.

我也使用可移植类库来存储代码,因此无法使用HttpWebRequest进行Web请求.

我也尝试过;

ServicePointManager.ServerCertificateValidationCallback += (o, certificate, chain, errors) => true;

和;

System.Security.Cryptography.AesCryptoServiceProvider b = new System.Security.Cryptography.AesCryptoServiceProvider();

在我的应用程序OnCreate类(android)中.

我还将HttpClient实现更改为AndroidClientHandler,同时将SSL/TLS实现更改为1.1.在模拟器和设备上尝试此操作.

有人有建议吗？

Answer 1

试试这个:打开Android项目属性 - > Android选项 - >高级

将HttpClient实现设置从Default切换到Android

似乎默认的Mono客户端处理程序因HTTPS而中断.