/// <summary>
/// Processes Alexa request AND validates request signature
/// </summary>
/// <param name="httpRequest"></param>
/// <returns></returns>
public static async Task <HttpResponseMessage> GetResponseAsync(this SpeechletService service, HttpRequestMessage httpRequest)
{
string chainUrl = null;
if (httpRequest.Headers.Contains(Sdk.SIGNATURE_CERT_URL_REQUEST_HEADER))
{
chainUrl = httpRequest.Headers.GetValues(Sdk.SIGNATURE_CERT_URL_REQUEST_HEADER).FirstOrDefault(x => !string.IsNullOrEmpty(x));
}
string signature = null;
if (httpRequest.Headers.Contains(Sdk.SIGNATURE_REQUEST_HEADER))
{
signature = httpRequest.Headers.GetValues(Sdk.SIGNATURE_REQUEST_HEADER).FirstOrDefault(x => !string.IsNullOrEmpty(x));
}
var content = await httpRequest.Content.ReadAsStringAsync();
try {
var alexaRequest = await service.GetRequestAsync(content, chainUrl, signature);
var alexaResponse = await service.ProcessRequestAsync(alexaRequest);
var json = alexaResponse?.ToJson();
return((json == null) ?
new HttpResponseMessage(HttpStatusCode.InternalServerError) :
new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StringContent(json, Encoding.UTF8, "application/json")
});
}
catch (SpeechletValidationException ex) {
return(new HttpResponseMessage(HttpStatusCode.BadRequest)
{
ReasonPhrase = ex.ValidationResult.ToString()
});
}
}
protected SpeechletBase()
{
Service = new SpeechletService(this);
}