Asynchronously get the raw data for resource.
When the operation is finished, callback will be called. You can then call webkit.web_resource.WebResource.getDataFinish to get the result of the operation.
a #GCancellable or null to ignore
a #GAsyncReadyCallback to call when the request is satisfied
Asynchronously get the raw data for resource.
When the operation is finished, callback will be called. You can then call webkit.web_resource.WebResource.getDataFinish to get the result of the operation.