C#•2w ago

✅ Request error: The SSL connection could not be established, see inner exception.

using System.Text;

var client = new HttpClient();

// Set up the request
var request = new HttpRequestMessage
{
    Method = HttpMethod.Post,
    RequestUri = new Uri("https://<my-domain>.azurewebsites.net/company/products/notifier/email"),
    Content = new StringContent(
        @"{
                    ""fromMail"": ""[email protected]"",
                    ""fromName"": ""IHRM-Team"",
                    ""to"": [""[email protected]""],
                    ""subject"": ""some message"",
                    ""templateId"": ""d-401bd3782f974c1da24db450f5f1eb86"",
                    ""props"": {
                        ""name"": ""GUS""
                    }
                }",
        Encoding.UTF8,
        "application/json"
    )
};

// Set headers
request.Headers.Add("accept", "*/*");

try
{
    // Send the request
    var response = await client.SendAsync(request);

    // Ensure the response indicates success
    response.EnsureSuccessStatusCode();

    // Print the response content
    var responseContent = await response.Content.ReadAsStringAsync();
    Console.WriteLine($"Response: {responseContent}");
}
catch (HttpRequestException e)
{
    Console.WriteLine($"Request error: {e.Message}");
}

using System.Text;

var client = new HttpClient();

// Set up the request
var request = new HttpRequestMessage
{
    Method = HttpMethod.Post,
    RequestUri = new Uri("https://<my-domain>.azurewebsites.net/company/products/notifier/email"),
    Content = new StringContent(
        @"{
                    ""fromMail"": ""[email protected]"",
                    ""fromName"": ""IHRM-Team"",
                    ""to"": [""[email protected]""],
                    ""subject"": ""some message"",
                    ""templateId"": ""d-401bd3782f974c1da24db450f5f1eb86"",
                    ""props"": {
                        ""name"": ""GUS""
                    }
                }",
        Encoding.UTF8,
        "application/json"
    )
};

// Set headers
request.Headers.Add("accept", "*/*");

try
{
    // Send the request
    var response = await client.SendAsync(request);

    // Ensure the response indicates success
    response.EnsureSuccessStatusCode();

    // Print the response content
    var responseContent = await response.Content.ReadAsStringAsync();
    Console.WriteLine($"Response: {responseContent}");
}
catch (HttpRequestException e)
{
    Console.WriteLine($"Request error: {e.Message}");
}

I am using a mail sender API which is working in other language scripts and postman but not in C#. and giving the above mentioned error

15 Replies

Honza K.•2w ago

Show us the exception + inner exceptions... Most likely the server's SSL certificate is not trusted on your machine

bhavishOP•2w ago

How do i make it to trust

Unhandled exception. System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
 ---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception.
 ---> Interop+AppleCrypto+SslException: bad protocol version
   --- End of inner exception stack trace ---
   at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(QueueItem queueItem)
   at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.

Unhandled exception. System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.
 ---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception.
 ---> Interop+AppleCrypto+SslException: bad protocol version
   --- End of inner exception stack trace ---
   at System.Net.Security.SslStream.ForceAuthenticationAsync[TIOAdapter](Boolean receiveFirst, Byte[] reAuthenticationData, CancellationToken cancellationToken)
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.ConnectHelper.EstablishSslConnectionAsync(SslClientAuthenticationOptions sslOptions, HttpRequestMessage request, Boolean async, Stream stream, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.AddHttp11ConnectionAsync(QueueItem queueItem)
   at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.

Honza K.•2w ago

Interop+AppleCrypto+SslException: bad protocol version are you expected to use TLS v1.3? AFAIK it is not supported on macOS

bhavishOP•2w ago

idk, it works on postman (cURL) and other language scirpts is there some way to bypass this?

Honza K.•2w ago

you can try this new HttpClient(new SocketsHttpHandler() { SslOptions = { EnabledSslProtocols = System.Security.Authentication.SslProtocols.Tls12 } });

Honza K.•2w ago

https://learn.microsoft.com/en-us/dotnet/fundamentals/networking/http/httpclient-migrate-from-httpwebrequest

Migrate from HttpWebRequest - .NET

Learn how to migrate from HttpWebRequest to HttpClient.

Unknown User•2w ago

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Honza K.•2w ago

I'm not sure this would help with the posted error... that is why I posted the link to migration FROM web request as it shows how to use the SocketsHttpHandler... not saying anybody should use http web request in modern .net

Unknown User•2w ago

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Honza K.•2w ago

yeah but the link shows how to use the sockets handler 😄

Unknown User•2w ago

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Honza K.•2w ago

I had no clue you can change the TLS version like this

Unknown User•2w ago

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Honza K.•2w ago

If I knew you can change it in project settings I would say that lol

Unknown User•7d ago

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Gaming

Programming

✅ Request error: The SSL connection could not be established, see inner exception.

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