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 async Task <CloudEvent> ToCloudEventInternalAsync(HttpHeaders headers, HttpContent content,
CloudEventFormatter formatter, IEnumerable <CloudEventAttribute> extensionAttributes)
{
if (HasCloudEventsContentType(content))
{
// FIXME: Handle no formatter being specified.
var stream = await content.ReadAsStreamAsync().ConfigureAwait(false);
return(await formatter.DecodeStructuredModeMessageAsync(stream, content.Headers.ContentType.ToContentType(), extensionAttributes).ConfigureAwait(false));
}
else
{
string versionId = headers.Contains(HttpUtilities.SpecVersionHttpHeader)
? headers.GetValues(HttpUtilities.SpecVersionHttpHeader).First()
: null;
if (versionId is null)
{
throw new ArgumentException("Request is not a CloudEvent");
}
var version = CloudEventsSpecVersion.FromVersionId(versionId);
if (version is null)
{
throw new ArgumentException($"Unsupported CloudEvents spec version '{versionId}'");
}
var cloudEvent = new CloudEvent(version, extensionAttributes);
foreach (var header in headers)
{
string attributeName = HttpUtilities.GetAttributeNameFromHeaderName(header.Key);
if (attributeName is null || attributeName == CloudEventsSpecVersion.SpecVersionAttribute.Name)
{
continue;
}
string attributeValue = HttpUtilities.DecodeHeaderValue(header.Value.First());
cloudEvent.SetAttributeFromString(attributeName, attributeValue);
}
if (content is object)
{
// TODO: Should this just be the media type? We probably need to take a full audit of this...
cloudEvent.DataContentType = content.Headers?.ContentType?.ToString();
var data = await content.ReadAsByteArrayAsync().ConfigureAwait(false);
formatter.DecodeBinaryModeEventData(data, cloudEvent);
}
return(cloudEvent);
}
}
private static async Task <CloudEvent> ToCloudEventInternalAsync(HttpHeaders headers, HttpContent content,
CloudEventFormatter formatter, IEnumerable <CloudEventAttribute>?extensionAttributes, string paramName)
{
Validation.CheckNotNull(formatter, nameof(formatter));
if (HasCloudEventsContentType(content))
{
var stream = await content.ReadAsStreamAsync().ConfigureAwait(false);
return(await formatter.DecodeStructuredModeMessageAsync(stream, MimeUtilities.ToContentType(content.Headers.ContentType), extensionAttributes).ConfigureAwait(false));
}
else
{
string?versionId = headers.Contains(HttpUtilities.SpecVersionHttpHeader)
? headers.GetValues(HttpUtilities.SpecVersionHttpHeader).First()
: null;
if (versionId is null)
{
throw new ArgumentException($"Request does not represent a CloudEvent. It has neither a {HttpUtilities.SpecVersionHttpHeader} header, nor a suitable content type.", nameof(paramName));
}
var version = CloudEventsSpecVersion.FromVersionId(versionId)
?? throw new ArgumentException($"Unknown CloudEvents spec version '{versionId}'", paramName);
var cloudEvent = new CloudEvent(version, extensionAttributes);
foreach (var header in headers)
{
string?attributeName = HttpUtilities.GetAttributeNameFromHeaderName(header.Key);
if (attributeName is null || attributeName == CloudEventsSpecVersion.SpecVersionAttribute.Name)
{
continue;
}
string attributeValue = HttpUtilities.DecodeHeaderValue(header.Value.First());
cloudEvent.SetAttributeFromString(attributeName, attributeValue);
}
if (content is object)
{
// TODO: Should this just be the media type? We probably need to take a full audit of this...
cloudEvent.DataContentType = content.Headers?.ContentType?.ToString();
var data = await content.ReadAsByteArrayAsync().ConfigureAwait(false);
formatter.DecodeBinaryModeEventData(data, cloudEvent);
}
return(Validation.CheckCloudEventArgument(cloudEvent, paramName));
}
}
/// <summary>
/// Converts this listener request into a CloudEvent object, with the given extension attributes.
/// </summary>
/// <param name="httpListenerRequest">Listener request</param>
/// <param name="formatter"></param>
/// <param name="extensions">List of extension instances</param>
/// <returns>A CloudEvent instance or 'null' if the request message doesn't hold a CloudEvent</returns>
public static CloudEvent ToCloudEvent(this HttpListenerRequest httpListenerRequest,
ICloudEventFormatter formatter, params CloudEventAttribute[] extensionAttributes)
{
if (HasCloudEventsContentType(httpListenerRequest))
{
// FIXME: Handle no formatter being specified.
return(formatter.DecodeStructuredEvent(httpListenerRequest.InputStream, extensionAttributes));
}
else
{
CloudEventsSpecVersion version = CloudEventsSpecVersion.Default;
if (httpListenerRequest.Headers[HttpUtilities.SpecVersionHttpHeader] is string versionId)
{
version = CloudEventsSpecVersion.FromVersionId(versionId);
}
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);
}
// TODO: Check that this doesn't come through as a header already
cloudEvent.DataContentType = httpListenerRequest.ContentType;
// TODO: This is a bit ugly.
var memoryStream = new MemoryStream();
httpListenerRequest.InputStream.CopyTo(memoryStream);
if (memoryStream.Length != 0)
{
cloudEvent.Data = formatter.DecodeData(memoryStream.ToArray(), cloudEvent.DataContentType);
}
return(cloudEvent);
}
}
/// <summary>
/// Converts this listener request into a CloudEvent object, with the given extension attributes.
/// </summary>
/// <param name="httpListenerRequest">Listener request</param>
/// <param name="formatter"></param>
/// <param name="extensions">List of extension instances</param>
/// <returns>The CloudEvent corresponding to the given request.</returns>
/// <exception cref="ArgumentException">The request does not represent a CloudEvent,
/// or the event's specification version is not supported,
/// or the event formatter cannot interpret it.</exception>
public static CloudEvent ToCloudEvent(this HttpListenerRequest httpListenerRequest,
CloudEventFormatter formatter, params CloudEventAttribute[] extensionAttributes)
{
if (HasCloudEventsContentType(httpListenerRequest))
{
return(formatter.DecodeStructuredModeMessage(httpListenerRequest.InputStream, MimeUtilities.CreateContentTypeOrNull(httpListenerRequest.ContentType), extensionAttributes));
}
else
{
string versionId = httpListenerRequest.Headers[HttpUtilities.SpecVersionHttpHeader];
if (versionId is null)
{
throw new ArgumentException("Request is not a CloudEvent");
}
var version = CloudEventsSpecVersion.FromVersionId(versionId);
if (version is null)
{
throw new ArgumentException($"Unsupported CloudEvents spec version '{versionId}'");
}
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;
formatter.DecodeBinaryModeEventData(BinaryDataUtilities.ToByteArray(httpListenerRequest.InputStream), cloudEvent);
return(cloudEvent);
}
}
