I'm building an application where I want the call recordings URL and duration of the call captured upon completion of the call.

My recordingStatusCallback handler requests keep returning with a status 400 and I don't know why it is doing that or how I could debug this further.

Here is my Recordings handler:

[HttpPost]
public void Recordings([FromForm] VoiceRequest request)
{
    // TODO: Get the recording URL and log it to the database for the call 
    Console.WriteLine($"CallSID: {request.CallSid}");
    Console.WriteLine($"RecordingUrl: {request.RecordingUrl}");
    Console.WriteLine($"RecordingDuration: {request.RecordingDuration}");

    // Not sure what happens here... testing it out if transcriptions are available... 
    Console.WriteLine($"TranscriptionUrl: {request.TranscriptionUrl}");
}

For reference, I have a similar handler for statusCallbackEvent - see this snippet:

[HttpPost]
public void Events([FromForm] VoiceRequest request)
{
    Console.WriteLine($"CallSID: {request.CallSid}");
    
    Console.WriteLine($"CallStatus: {request.CallStatus}");

    Console.WriteLine($"DialCallDuration: {request.DialCallDuration}");
}

And this Events function is being called correctly without issues.

I'd appreciate your help!

I'm building an application where I want the call recordings URL and duration of the call captured upon completion of the call.

My recordingStatusCallback handler requests keep returning with a status 400 and I don't know why it is doing that or how I could debug this further.

Here is my Recordings handler:

[HttpPost]
public void Recordings([FromForm] VoiceRequest request)
{
    // TODO: Get the recording URL and log it to the database for the call 
    Console.WriteLine($"CallSID: {request.CallSid}");
    Console.WriteLine($"RecordingUrl: {request.RecordingUrl}");
    Console.WriteLine($"RecordingDuration: {request.RecordingDuration}");

    // Not sure what happens here... testing it out if transcriptions are available... 
    Console.WriteLine($"TranscriptionUrl: {request.TranscriptionUrl}");
}

For reference, I have a similar handler for statusCallbackEvent - see this snippet:

[HttpPost]
public void Events([FromForm] VoiceRequest request)
{
    Console.WriteLine($"CallSID: {request.CallSid}");
    
    Console.WriteLine($"CallStatus: {request.CallStatus}");

    Console.WriteLine($"DialCallDuration: {request.DialCallDuration}");
}

And this Events function is being called correctly without issues.

I'd appreciate your help!

• c#
• twilio
• asp-core-webapi

1 Answer 1

After lots of trial and error, I stumbled upon the solution to my problem. For whatever reason, the statusCallback and the recordingStatusCallback are not treated the same. The handler that eventually does work for me is as below

public async System.Threading.Tasks.Task RecordingsAsync()
{
    // TODO: Get the recording URL and log it to the database for the call 
    var form = await Request.ReadFormAsync();

    Console.WriteLine($"CallSid: {form["CallSid"]}");
    Console.WriteLine($"RecordingUrl: {form["RecordingUrl"]}");
    Console.WriteLine($"RecordingDuration: {form["RecordingDuration"]}");
}

I'm only accessing 3 values here but there are more parameters you can access - read about them here https://www.twilio/docs/voice/api/call-resource#parameters-sent-to-your-recordingstatuscallback-url

I would still like a Twilio expert to comment on whether my solution is the right way to do this or if there is a better-prescribed approach that should be considered.