public CloudEvent DecodeGenericRecord(GenericRecord record, IEnumerable <ICloudEventExtension> extensions = null)
{
if (!record.TryGetValue("attribute", out var attrObj))
{
return(null);
}
IDictionary <string, object> recordAttributes = (IDictionary <string, object>)attrObj;
object data = null;
if (!record.TryGetValue("data", out data))
{
data = null;
}
CloudEventsSpecVersion specVersion = CloudEventsSpecVersion.Default;
var cloudEvent = new CloudEvent(specVersion, extensions);
cloudEvent.Data = data;
var attributes = cloudEvent.GetAttributes();
foreach (var keyValuePair in recordAttributes)
{
// skip the version since we set that above
if (keyValuePair.Key.Equals(CloudEventAttributes.SpecVersionAttributeName(CloudEventsSpecVersion.V0_1), StringComparison.InvariantCultureIgnoreCase) ||
keyValuePair.Key.Equals(CloudEventAttributes.SpecVersionAttributeName(CloudEventsSpecVersion.V0_2), StringComparison.InvariantCultureIgnoreCase) ||
keyValuePair.Key.Equals(CloudEventAttributes.SpecVersionAttributeName(CloudEventsSpecVersion.V1_0), StringComparison.InvariantCultureIgnoreCase))
{
continue;
}
if (keyValuePair.Key == CloudEventAttributes.SourceAttributeName(specVersion) ||
keyValuePair.Key == CloudEventAttributes.DataSchemaAttributeName(specVersion))
{
attributes[keyValuePair.Key] = new Uri((string)keyValuePair.Value);
}
else if (keyValuePair.Key == CloudEventAttributes.TimeAttributeName(specVersion))
{
attributes[keyValuePair.Key] = Timestamps.Parse((string)keyValuePair.Value);
}
else
{
attributes[keyValuePair.Key] = keyValuePair.Value;
}
}
return(cloudEvent);
}
static string UrlEncodeAttributeAsHeaderValue(string key, object attributeValue,
CloudEventsSpecVersion specVersion, IEnumerable <ICloudEventExtension> extensions)
{
return(WebUtility.UrlEncode(ConvertToString()));
string ConvertToString()
{
switch (attributeValue)
{
case string text: return(text);
case DateTimeOffset dateTimeOffset: return(Timestamps.Format(dateTimeOffset));
case Uri uri: return(uri.ToString());
case int integer: return(integer.ToString(CultureInfo.InvariantCulture));
default:
byte[] binaryValue = jsonFormatter.EncodeAttribute(specVersion, key, attributeValue, extensions);
return(Encoding.UTF8.GetString(binaryValue));
}
};
}
void MapHeaders(CloudEvent cloudEvent, bool includeDataContentType)
{
string specVersionAttributeName = CloudEventAttributes.DataAttributeName(cloudEvent.SpecVersion);
string dataContentTypeAttributeName = CloudEventAttributes.DataContentTypeAttributeName(cloudEvent.SpecVersion);
foreach (var attribute in cloudEvent.GetAttributes())
{
string key = attribute.Key;
string headerName = "ce-" + key;
object value = attribute.Value;
// Never map the spec attribute to a header
if (key == specVersionAttributeName)
{
continue;
}
// Only map the data content type attribute to a header if we've been asked to
else if (key == dataContentTypeAttributeName && !includeDataContentType)
{
continue;
}
else
{
string headerValue = attribute.Value switch
{
string text => WebUtility.UrlEncode(text),
ContentType contentType => contentType.ToString(),
DateTimeOffset dto => Timestamps.Format(dto),
Uri uri => uri.ToString(),
int integer => integer.ToString(),
_ => WebUtility.UrlEncode(Encoding.UTF8.GetString(
jsonFormatter.EncodeAttribute(cloudEvent.SpecVersion, key, value, cloudEvent.Extensions.Values)))
};
Headers.Add(headerName, headerValue);
}
}
}
protected override DateTimeOffset ParseImpl(string value) => Timestamps.Parse(value);
protected override string FormatImpl(DateTimeOffset value) => Timestamps.Format(value);
