public WebPubSubRequestValueProvider(WebPubSubRequest request, Type type)
{
_request = request;
Type = type;
}
protected async override Task <IValueProvider> BuildAsync(WebPubSubRequestAttribute attrResolved, IReadOnlyDictionary <string, object> bindingData)
{
if (bindingData == null)
{
throw new ArgumentNullException(nameof(bindingData));
}
bindingData.TryGetValue(HttpRequestName, out var httpRequest);
var request = httpRequest as HttpRequest;
var httpContext = request?.HttpContext;
if (httpContext == null)
{
return(new WebPubSubRequestValueProvider(new WebPubSubRequest(null, new InvalidRequest(HttpStatusCode.BadRequest), HttpStatusCode.BadRequest), _userType));
}
// Build abuse response
if (Utilities.RespondToServiceAbuseCheck(httpContext.Request, _options.AllowedHosts, out var abuseResponse))
{
var abuseRequest = new WebPubSubRequest(null, new ValidationRequest(abuseResponse.StatusCode == HttpStatusCode.OK), abuseResponse);
return(new WebPubSubRequestValueProvider(abuseRequest, _userType));
}
// Build service request context
if (!TryParseRequest(request, out var connectionContext))
{
// Not valid WebPubSubRequest
return(new WebPubSubRequestValueProvider(new WebPubSubRequest(connectionContext, new InvalidRequest(HttpStatusCode.BadRequest, Constants.ErrorMessages.NotValidWebPubSubRequest), HttpStatusCode.BadRequest), _userType));
}
// Signature check
// TODO: make the check more accurate for current function instead from global settings.
if (!Utilities.ValidateSignature(connectionContext.ConnectionId, connectionContext.Signature, _options.AccessKeys))
{
return(new WebPubSubRequestValueProvider(new WebPubSubRequest(connectionContext, new InvalidRequest(HttpStatusCode.Unauthorized, Constants.ErrorMessages.SignatureValidationFailed), HttpStatusCode.Unauthorized), _userType));
}
WebPubSubRequest wpsRequest;
var requestType = Utilities.GetRequestType(connectionContext.EventType, connectionContext.EventName);
switch (requestType)
{
case RequestType.Connect:
{
var content = await ReadString(request.Body).ConfigureAwait(false);
var eventRequest = JsonConvert.DeserializeObject <ConnectEventRequest>(content);
wpsRequest = new WebPubSubRequest(connectionContext, eventRequest);
}
break;
case RequestType.Connected:
{
wpsRequest = new WebPubSubRequest(connectionContext, new ConnectedEventRequest());
}
break;
case RequestType.Disconnected:
{
var content = await ReadString(request.Body).ConfigureAwait(false);
var eventRequest = JsonConvert.DeserializeObject <DisconnectedEventRequest>(content);
wpsRequest = new WebPubSubRequest(connectionContext, eventRequest);
}
break;
case RequestType.User:
{
var contentType = MediaTypeHeaderValue.Parse(request.ContentType);
if (!Utilities.ValidateMediaType(contentType.MediaType, out var dataType))
{
var invalidRequest = new InvalidRequest(HttpStatusCode.BadRequest, $"{Constants.ErrorMessages.NotSupportedDataType}{request.ContentType}");
return(new WebPubSubRequestValueProvider(new WebPubSubRequest(connectionContext, invalidRequest, HttpStatusCode.BadRequest), _userType));
}
var payload = ReadBytes(request.Body);
var eventRequest = new MessageEventRequest(BinaryData.FromBytes(payload), dataType);
wpsRequest = new WebPubSubRequest(connectionContext, eventRequest);
}
break;
default:
wpsRequest = new WebPubSubRequest(connectionContext, new InvalidRequest(HttpStatusCode.NotFound, "Unknown request"));
break;
}
return(new WebPubSubRequestValueProvider(wpsRequest, _userType));
}