dotnet：使用twilio从浏览器拨打电话

Question

我正在用angular 8和dotnet core 3 Web API创建一个组件，以便在提交表单时拨打电话号码。我按照this tutorial实现了这一目标。下面是我的角度ts代码。

Phonecall() {
var params = { "phoneNumber": this.phoneNumber };
this.connection = Twilio.Device.connect(params);  }

如本教程中所述，发出上述连接请求后，我通过网络挂钩收到了对我的控制器的发帖请求，但发帖请求中没有任何电话号码，因此出于测试目的，我对电话进行了硬编码数。在调用connect方法后我听到文本语音转换阅读我打算通话的phoneNumber]并且连接结束而没有启动呼叫，下面是控制器文件。

 [Route("api/[controller]")]
[ApiController]
public class TwilioController : ControllerBase
{
    [HttpGet("token")]
    public string GetToken()
    {
        const string accountSid = "xxxxxxxxxxxxxxxxx";
        const string authToken = "xxxxxxxxxxxxxxxxxx";


        const string appSid = "xxxxxxxxxxxxxxxxxxxxxxxxx";

        var scopes = new HashSet<IScope>
        {
            new OutgoingClientScope(appSid)
        };
        var capability = new ClientCapability(accountSid, authToken, scopes: scopes);

        return capability.ToJwt();
    }

    [HttpPost("call")]
    [HttpPost]
    public string Connect([System.Web.Http.FromUri]string phoneNumber)
    {
        phoneNumber = "xxxxxxxxx";
        string fromNumber = "xxxxxxxx";
        var response = new VoiceResponse();

        var dial = new Dial(callerId: fromNumber);
        if (phoneNumber != null)
        {
            dial.Number(phoneNumber);
        }
        else
        {
            dial.Client("support_agent");
        }
        response.Append(dial);

        return response.ToString();
    }

}
下面是来自twilio调试器的日志。

Request Parameters:
ApplicationSid  "xxxxxx"
ApiVersion  "2010-04-01"
phoneNumber "xxxxxx"
Called  ""
Caller  "client:Anonymous"
CallStatus  "ringing"
To  ""
From    "client:Anonymous"
CallSid "xxxx"
Direction   "inbound"
AccountSid  "xxxx"



Message Text:
    Msg "An attempt to retrieve content from https://b8d2ab8f8ec1.ngrok.io/api/Twilio/call returned the HTTP status code 415"
msg "An attempt to retrieve content from https://b8d2ab8f8ec1.ngrok.io/api/Twilio/call returned the HTTP status code 415"
sourceComponent "12000"
ErrorCode   "11200"
httpResponse    "415"
LogLevel    "ERROR"
url "https://b8d2ab8f8ec1.ngrok.io/api/Twilio/call"

Response Headers:
Transfer-Encoding chunked
X-Cache MISS from Twilio-Cache
Server Microsoft-IIS/10.0
X-Cache-Lookup MISS from Twilio-Cache:3128
X-Twilio-WebhookAttempt 1
X-Twilio-WebhookRetriable false
Date Tue, 09 Jun 2020 07:57:49 GMT
X-Powered-By ASP.NET
Content-Type application/problem+json; charset=utf-8

Response Body:
Body
No body.
任何人都可以告诉我我做错了什么，或者这是否是从浏览器拨打电话到电话号码的正确方法。提前谢谢。

我正在用angular 8和dotnet core 3 Web API创建一个组件，以便在提交表单时拨打电话号码。我按照本教程来实现。下面是我的角度ts代码。 ...

Answer 1

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