// TODO: CloudEvent.ToHttpRequestMessage?
// TODO: What does this (web hook validation) have to do with CloudEvents?
// Well, it's specced in the same repo: https://github.com/cloudevents/spec/blob/v1.0.1/http-webhook.md
/// <summary>
/// Handle the request as WebHook validation request
/// </summary>
/// <param name="httpRequestMessage">Request</param>
/// <param name="validateOrigin">Callback that returns whether the given origin may push events. If 'null', all origins are acceptable.</param>
/// <param name="validateRate">Callback that returns the acceptable request rate. If 'null', the rate is not limited.</param>
/// <returns>Response</returns>
public static async Task <HttpResponseMessage> HandleAsWebHookValidationRequest(
this HttpRequestMessage httpRequestMessage, Func <string, bool> validateOrigin,
Func <string, string> validateRate)
{
if (!IsWebHookValidationRequest(httpRequestMessage))
{
return(new HttpResponseMessage(HttpStatusCode.MethodNotAllowed));
}
var(statusCode, allowedOrigin, allowedRate) = await HttpUtilities.HandleWebHookValidationAsync(httpRequestMessage,
(request, headerName) => request.Headers.TryGetValues(headerName, out var values)?values.FirstOrDefault() : null,
validateOrigin, validateRate);
var message = new HttpResponseMessage(statusCode);
if (allowedOrigin is object)
{
message.Headers.Add("Allow", "POST");
message.Headers.Add("WebHook-Allowed-Origin", allowedOrigin);
if (allowedRate is object)
{
message.Headers.Add("WebHook-Allowed-Rate", allowedRate);
}
}
return(message);
}
// TODO: Do we want this? It's not about CloudEvents...
/// <summary>
/// Handle the request as WebHook validation request
/// </summary>
/// <param name="context">Request context</param>
/// <param name="validateOrigin">Callback that returns whether the given origin may push events. If 'null', all origins are acceptable.</param>
/// <param name="validateRate">Callback that returns the acceptable request rate. If 'null', the rate is not limited.</param>
/// <returns>Task</returns>
public static async Task HandleAsWebHookValidationRequest(this HttpListenerContext context,
Func <string, bool> validateOrigin, Func <string, string> validateRate)
{
if (!IsWebHookValidationRequest(context.Request))
{
context.Response.StatusCode = (int)HttpStatusCode.MethodNotAllowed;
context.Response.Close();
}
var(statusCode, allowedOrigin, allowedRate) = await HttpUtilities.HandleWebHookValidationAsync(context.Request,
(request, headerName) => request.Headers.Get(headerName), validateOrigin, validateRate);
context.Response.StatusCode = (int)statusCode;
if (allowedOrigin is object)
{
context.Response.Headers.Add("Allow", "POST");
context.Response.Headers.Add("WebHook-Allowed-Origin", allowedOrigin);
if (allowedRate is object)
{
context.Response.Headers.Add("WebHook-Allowed-Rate", allowedRate);
}
}
context.Response.Close();
}
