private async static Task <CloudEvent> ToCloudEventAsyncImpl(HttpListenerRequest httpListenerRequest,
CloudEventFormatter formatter, IEnumerable <CloudEventAttribute>?extensionAttributes, bool async)
{
Validation.CheckNotNull(httpListenerRequest, nameof(httpListenerRequest));
Validation.CheckNotNull(formatter, nameof(formatter));
var stream = httpListenerRequest.InputStream;
if (HasCloudEventsContentType(httpListenerRequest))
{
var contentType = MimeUtilities.CreateContentTypeOrNull(httpListenerRequest.ContentType);
return(async
? await formatter.DecodeStructuredModeMessageAsync(stream, contentType, extensionAttributes).ConfigureAwait(false)
: formatter.DecodeStructuredModeMessage(stream, contentType, extensionAttributes));
}
else
{
string versionId = httpListenerRequest.Headers[HttpUtilities.SpecVersionHttpHeader];
if (versionId is null)
{
throw new ArgumentException($"Request does not represent a CloudEvent. It has neither a {HttpUtilities.SpecVersionHttpHeader} header, nor a suitable content type.", nameof(httpListenerRequest));
}
var version = CloudEventsSpecVersion.FromVersionId(versionId)
?? throw new ArgumentException($"Unknown CloudEvents spec version '{versionId}'", nameof(httpListenerRequest));
var cloudEvent = new CloudEvent(version, extensionAttributes);
var headers = httpListenerRequest.Headers;
foreach (var key in headers.AllKeys)
{
string?attributeName = HttpUtilities.GetAttributeNameFromHeaderName(key);
if (attributeName is null || attributeName == CloudEventsSpecVersion.SpecVersionAttribute.Name)
{
continue;
}
string attributeValue = HttpUtilities.DecodeHeaderValue(headers[key]);
cloudEvent.SetAttributeFromString(attributeName, attributeValue);
}
// The data content type should not have been set via a "ce-" header; instead,
// it's in the regular content type.
cloudEvent.DataContentType = httpListenerRequest.ContentType;
ReadOnlyMemory <byte> data = async
? await BinaryDataUtilities.ToReadOnlyMemoryAsync(stream).ConfigureAwait(false)
: BinaryDataUtilities.ToReadOnlyMemory(stream);
formatter.DecodeBinaryModeEventData(data, cloudEvent);
return(Validation.CheckCloudEventArgument(cloudEvent, nameof(httpListenerRequest)));
}
}
private static ReadOnlyMemory <byte> GetContent(HttpResponse response)
{
response.Body.Position = 0;
return(BinaryDataUtilities.ToReadOnlyMemory(response.Body));
}
