.net core 2.0 HTTPS request fails using HttpClient 安全错误

最近.net core 项目中遇到一个问题,通过Httpclient 访问https的接口报错,错误如下:

WinHttpException: A security error occurredSystem.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult()System.Net.Http.WinHttpHandler+<StartRequest>d__105.MoveNext()HttpRequestException: An error occurred while sending the request.System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult()System.Net.Http.HttpClient+<FinishSendAsync>d__58.MoveNext()System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)System.Runtime.CompilerServices.TaskAwaiter.GetResult()MyApp.Web.Controllers.HomeController.Test() in HomeController.csvar response = client.GetAsync("https://someurl.com/api.php?arg1=some&arg2=test").GetAwaiter().GetResult();lambda_method(Closure , object , Object[] )Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker+<InvokeActionMethodAsync>d__27.MoveNext()通过排查发现是.NETFramework 4.6包括一个新的安全特性，它阻止连接的不安全密码和散列算法。

可以通过下面的解决方案处理:

using (var handler = new HttpClientHandler())
{handler.ServerCertificateCustomValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;handler.SslProtocols = SslProtocols.Tls12 | SslProtocols.Tls11 | SslProtocols.Tls;using (HttpClient client = new HttpClient(handler)){string requestObjJson = requestObj.ToJson();var address = new Uri($"https://yourcompany.com/");string token = GetToken();client.BaseAddress = address;client.DefaultRequestHeaders.Accept.Clear();client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);var contentData = new StringContent(requestObjJson, System.Text.Encoding.UTF8, "application/json");using (var response = await client.PostAsync("yourcompany/api", contentData)){var content = response.Content.ReadAsStringAsync();var taskResult = content.Result;JObject resultObj = JObject.Parse(taskResult);return resultObj;}}
}

需要注意的是，对于.NET core 2.0，您需要使用HttpClientHandler而不是ServicePointManager.

转载于:https://www.cnblogs.com/InfyHarry/p/9302304.html

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.net core 2.0 HTTPS request fails using HttpClient 安全错误

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