centos下无法 asp.net core无法请求https怎么办？

黑子大哥 2019-05-01 09:22:51
以前都是玩window，最近asp.netcore很火，于是使用了，部署在centos7.2的时候出现了各种各样的坑
其中之一就是无法请求https的坑，网上找了一大堆资料，都不能解决，请问大侠们，如何解决这个bug？？？

主要是请求HTTPS，http没事，这个错误大概就是说证书问题吧，但是那里找证书呢？？
错误：The SSL connection could not be established, see inner exception

代码：




            try

            {

                var html = string.Empty;

                HttpClientHandler httpclientHandler = new HttpClientHandler();

                httpclientHandler.ServerCertificateCustomValidationCallback = (msg, cert, chain, error) => true;

                using (HttpClient client = new HttpClient(httpclientHandler))

                {

                    html = client.GetStringAsync(url).GetAwaiter().GetResult();

                }

            }

            catch (Exception ex)

            {

                //下载源码出现错误

                _log.Error(this, $"生成HTML请求{url}", ex);

            }

如果我在运行文件设置：
{

  "runtimeOptions": {

    "tfm": "netcoreapp2.2",

    "framework": {

      "name": "Microsoft.AspNetCore.App",

      "version": "2.2.1"

    },

    "configProperties": {

      "System.GC.Server": true,

	  "System.Net.Http.useSocketsHttpHandler": false

    }

  }

}


不报错误了，但是会出现获取源码结果为空的

到底怎么解决啊？
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黑子大哥 2019-06-23
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引用 10 楼 秋的红果实 的回复:
看你有几个帖子了，镜像是怎么生成的，运行时端口映射成功没？
还有，你是windows下的docker还是centos下


不知道是我没有表述清楚还是怎么怎么的，我有几个帖子在询问docker怎么用，那是刚入门，要去了解嘛，我docker镜像端口映射不成功愿意是我撞了nginx，默认是80了，
后面，centos部署成功了，docker也部署成功了，能访问了，程序也正常使用，不能正常的是一项功能不能正常使用，就是采集功能

我是程序内部又一段代码，代码用httpclient请求别人的地址，比如请求 https://www.baidu.com，请求别人的 网址的时候，失败，报错说SSL证书问题，但是我不知道怎么解决这个问题，所以发的帖子询问为什么？现在整得我很无奈，解决不了，于是我只得再次部署在window上
秋的红果实 2019-05-09
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看你有几个帖子了，镜像是怎么生成的，运行时端口映射成功没？ 还有，你是windows下的docker还是centos下
黑子大哥 2019-05-09
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引用 8 楼 秋的红果实 的回复:
在startup里，configue方法里面，添加下列代码 

app.UseStaticFiles();
就可以访问了
     app.AddStaticFiles(new HTHCMS.Web.Mvc.Entity.StaticFileDirectory("upload", CommonServiceCollectionExtensions.DefaultMines),
                 new HTHCMS.Web.Mvc.Entity.StaticFileDirectory("wwwroot", CMSGlobalConfig.RequestAssetPath, null));
 public static void AddStaticFiles(this IApplicationBuilder app, params StaticFileDirectory[] filedir)
        {
            //默认wwwroot 支持
            app.UseStaticFiles();

            foreach (var dir in filedir)
            {
                var upload_path = Path.Combine(Directory.GetCurrentDirectory(), dir.Path);
                Console.WriteLine(string.Format("建立静态目录 {0}", upload_path));
                if (!Directory.Exists(upload_path))
                {
                    Directory.CreateDirectory(upload_path);
                    Console.WriteLine(string.Format("建立静态目录 {0} 完成", upload_path));
                }
                else
                {
                    Console.WriteLine(string.Format("建立静态目录 {0} 存在.", upload_path));
                }
                app.UseStaticFiles(new StaticFileOptions()
                {
                    FileProvider = new PhysicalFileProvider(upload_path),
                    RequestPath = string.IsNullOrWhiteSpace(dir.RPath) ? new PathString() : new PathString(string.Format("/{0}", dir.RPath)),
                    ContentTypeProvider = dir.Mines != null && dir.Mines.Count > 0 ? new FileExtensionContentTypeProvider(dir.Mines) : new FileExtensionContentTypeProvider()
                    //ServeUnknownFileTypes = true
                });
            }

            //添加一个statics默认根目录路径去访问
            app.AddStaticRoot(CMSGlobalConst.StaticDirInfo);

            Console.WriteLine("建立所有静态目录完毕...");
        }
使用过了，在window下正常访问，在centos下也正常访问，在docker下就不行了，哎！！！
秋的红果实 2019-05-09
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在startup里，configue方法里面，添加下列代码 

app.UseStaticFiles();
就可以访问了
黑子大哥 2019-05-08
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引用 6 楼 程序员的键盘 的回复:
[quote=引用 5 楼 黑子大哥 的回复:] [quote=引用 3 楼 程序员的键盘 的回复:] 尝试一下设协议？ 

//请求前设置一下使用的安全协议类型 System.Net
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)){
    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>
    {
       return true; //总是接受  
    });
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
}
尝试过了，还是一样的错误 
生成HTML请求XXXXXXX/vod/68416.html
System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.
   at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, ExceptionDispatchInfo exception)
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Security.SslState.ThrowIfExceptional()
   at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)
   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__47_1(IAsyncResult iar)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask`1 creationTask)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
   at System.Net.Http.HttpClient.GetStringAsyncCore(Task`1 getTask)
   at HTHCMS.Web.Mvc.Statics.StaticsFileManager.ToCreate(String url) in E:\project\core\bs\hthcms3.0\01.Mvc\HTHCMS.Web.Mvc\Static\StaticsFileManager.cs:line 391
代码这么写？ 

            try
            {
                var html = string.Empty;
                //if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
                //{
                ServicePointManager.ServerCertificateValidationCallback =
                    new RemoteCertificateValidationCallback(
                        (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>
                {
                    return true; //总是接受  
                    });
                ServicePointManager.SecurityProtocol =
                    SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
                //}
                using (HttpClient client = new HttpClient())
                {
                    client.DefaultRequestHeaders.Add("_create_html", "1");
                    html = client.GetStringAsync(url).GetAwaiter().GetResult();
                }
            }
            catch (Exception ex)
            {
                //下载源码出现错误
                _log.Error(this, $"生成HTML", ex);
            }
没用呢[/quote] 你这错误翻译是证书无效啊 无法建立SSL连接，请参阅内部异常。 ---> System.Security.Authentication.AuthenticationException：根据验证程序，远程证书无效[/quote] 对啊，证书问题，这个证书怎么搞？？？ 搞不懂了，我将其换成docker部署，访问https的问题解决了，但是他妈的，wwwroot这种静态目录又不能访问了，哎，真的是一个又一个的坑
程序员的键盘 2019-05-07
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引用 5 楼 黑子大哥 的回复:
[quote=引用 3 楼 程序员的键盘 的回复:]
尝试一下设协议？


//请求前设置一下使用的安全协议类型 System.Net

if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)){

    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>

    {

       return true; //总是接受  

    });

    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

}


尝试过了，还是一样的错误
生成HTML请求XXXXXXX/vod/68416.html

System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.

   at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, ExceptionDispatchInfo exception)

   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)

--- End of stack trace from previous location where exception was thrown ---

   at System.Net.Security.SslState.ThrowIfExceptional()

   at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)

   at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)

   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)

   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__47_1(IAsyncResult iar)

   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)

--- End of stack trace from previous location where exception was thrown ---

   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)

   --- End of inner exception stack trace ---

   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)

   at System.Threading.Tasks.ValueTask`1.get_Result()

   at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)

   at System.Threading.Tasks.ValueTask`1.get_Result()

   at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask`1 creationTask)

   at System.Threading.Tasks.ValueTask`1.get_Result()

   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)

   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

   at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)

   at System.Net.Http.HttpClient.GetStringAsyncCore(Task`1 getTask)

   at HTHCMS.Web.Mvc.Statics.StaticsFileManager.ToCreate(String url) in E:\project\core\bs\hthcms3.0\01.Mvc\HTHCMS.Web.Mvc\Static\StaticsFileManager.cs:line 391


代码这么写？


            try

            {

                var html = string.Empty;

                //if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))

                //{

                ServicePointManager.ServerCertificateValidationCallback =

                    new RemoteCertificateValidationCallback(

                        (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>

                {

                    return true; //总是接受  

                    });

                ServicePointManager.SecurityProtocol =

                    SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

                //}

                using (HttpClient client = new HttpClient())

                {

                    client.DefaultRequestHeaders.Add("_create_html", "1");

                    html = client.GetStringAsync(url).GetAwaiter().GetResult();

                }

            }

            catch (Exception ex)

            {

                //下载源码出现错误

                _log.Error(this, $"生成HTML", ex);

            }


没用呢[/quote]


你这错误翻译是证书无效啊
无法建立SSL连接，请参阅内部异常。 ---> System.Security.Authentication.AuthenticationException：根据验证程序，远程证书无效
黑子大哥 2019-05-04
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引用 3 楼 程序员的键盘 的回复:
尝试一下设协议？


//请求前设置一下使用的安全协议类型 System.Net

if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)){

    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>

    {

       return true; //总是接受  

    });

    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

}


尝试过了，还是一样的错误
生成HTML请求XXXXXXX/vod/68416.html

System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.

   at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, ExceptionDispatchInfo exception)

   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)

   at System.Net.Security.SslState.PartialFrameCallback(AsyncProtocolRequest asyncRequest)

--- End of stack trace from previous location where exception was thrown ---

   at System.Net.Security.SslState.ThrowIfExceptional()

   at System.Net.Security.SslState.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)

   at System.Net.Security.SslState.EndProcessAuthentication(IAsyncResult result)

   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)

   at System.Net.Security.SslStream.<>c.<AuthenticateAsClientAsync>b__47_1(IAsyncResult iar)

   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)

--- End of stack trace from previous location where exception was thrown ---

   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)

   --- End of inner exception stack trace ---

   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsyncCore(Stream stream, SslClientAuthenticationOptions sslOptions, CancellationToken cancellationToken)

   at System.Threading.Tasks.ValueTask`1.get_Result()

   at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken)

   at System.Threading.Tasks.ValueTask`1.get_Result()

   at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask`1 creationTask)

   at System.Threading.Tasks.ValueTask`1.get_Result()

   at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken)

   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)

   at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)

   at System.Net.Http.HttpClient.GetStringAsyncCore(Task`1 getTask)

   at HTHCMS.Web.Mvc.Statics.StaticsFileManager.ToCreate(String url) in E:\project\core\bs\hthcms3.0\01.Mvc\HTHCMS.Web.Mvc\Static\StaticsFileManager.cs:line 391


代码这么写？


            try

            {

                var html = string.Empty;

                //if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))

                //{

                ServicePointManager.ServerCertificateValidationCallback =

                    new RemoteCertificateValidationCallback(

                        (object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>

                {

                    return true; //总是接受  

                    });

                ServicePointManager.SecurityProtocol =

                    SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

                //}

                using (HttpClient client = new HttpClient())

                {

                    client.DefaultRequestHeaders.Add("_create_html", "1");

                    html = client.GetStringAsync(url).GetAwaiter().GetResult();

                }

            }

            catch (Exception ex)

            {

                //下载源码出现错误

                _log.Error(this, $"生成HTML", ex);

            }


没用呢
黑子大哥 2019-05-04
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引用 2 楼 秋的红果实 的回复:
版本弄对没，
yum install dotnet-sdk-2.X

还要更新
yum update


版本肯定是OK的，其他的功能OK，就两个功能不能用，一个是HTTPS会失败。http正常，第二个是QRCode不报错，这是生成的流是空的，一直无法解决这两个bug，头疼
秋的红果实 2019-05-02
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版本弄对没， yum install dotnet-sdk-2.X 还要更新 yum update
程序员的键盘 2019-05-02
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尝试一下设协议？


//请求前设置一下使用的安全协议类型 System.Net

if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase)){

    ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback((object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) =>

    {

       return true; //总是接受  

    });

    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;

}
黑子大哥 2019-05-01
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难不成券CSDN都没人遇到过么？这算高深问题么？
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.NET Core是一个开源的模块化的Framework,不管是开发web或移动设备都在同一个Framework（.NET Core）下运行，而且 .NET Core也可在不同的操作系统上运行，包括Windows、linux、MacOS，实现了跨平台跨设备。 更棒的是.NET Core 在发布程序时不用事先安装Framework而是通过Nuget下载，这样在初次部署时就不用安装一个复杂而庞大Framework，而是按需下载。这种基于Nuget的按需加载铸就.NET Core 跨平台。
ASP.NET Core应用程序部署至生产环境中（CentOS7）
Centos7发布说明 环境说明： 服务器系统：CentOS 7.2.1511 相关工具：Xshel、Xftp 服务器软件软件：.netcore、nginx、supervisor 准备好发布的程序 安装.NET Core SDK for CentOS7 打开网址：https://www.microsoft.com/net/core#linuxcentos 复制如下命令，单步执行： sudo yum install libunwind libicu curl -sSL -o dotnet.tar.gz https://go.microsoft.com/fwlink/?LinkID=835019 sudo mkdir -p /opt/dotnet && sudo tar zxf dotnet.tar.gz -C /opt/dotnet sudo ln -s /opt/dotnet/dotnet /usr/local/bin 输入 dotnet –info 来查看是否安装成功 配置Nginx 下载安装Nginx，单步执行如下命令： curl -o nginx.rpm http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm rpm -ivh nginx.rpm yum install nginx systemctl start nginx 来启动nginx systemctl enable nginx 来设置nginx的开机启动（linux宕机、重启会自动运行nginx不需要连上去输入命令）。 配置防火墙 命令：firewall-cmd --zone=public --add-port=80/tcp --permanent（开放80端口） 命令：systemctl restart firewalld（重启防火墙以使配置即时生效） 测试nginx是否可以访问。 配置nginx对ASP.NET Core应用的转发 修改 /etc/nginx/conf.d/default.conf 文件，将文件内容替换为： server { listen 80; location / { proxy_pass http://localhost:5000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; } }
【ASP.NET编程知识】详解将ASP.NET Core应用程序部署至生产环境中（CentOS7）.docx
【ASP.NET编程知识】详解将ASP.NET Core应用程序部署至生产环境中（CentOS7）.docx
【ASP.NET编程知识】基于.NET Core 3.1 网站开发和部署的方法.docx
【ASP.NET编程知识】基于.NET Core 3.1 网站开发和部署的方法.docx
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