Streaming Methods in ASPNET Core gRPC Services

摘要

In the previous installment of Cutting Edge, I walked through building a new type of service based on the gRPC framework that (although available to C# developers for a while) in ASP.NET Core 3.0 debuts as a native service hosted directly by Kestrel. The gRPC framework is suited for peer-to-peer binary communication between connected endpoints-mostly, but not necessarily, microservices. It also supports up-to-date technical solutions such as Google Proto-buffor serialization of content and HTTP/2 for transportation. Visual Studio 2019 comes with an ASP.NET Core 3.0 project template for creating the skeleton of a gRPC service in just a few clicks. For a primer both about gRPC and the starter kit generated by Visual Studio, you can check out my July column at msdn.com/ magazine/mt833481. This month I take my exploration of gRPC one step further. First, I'll cover the underlying tooling in a bit more detail. In fact, some tooling is necessary to parse the content of the proto file to C# classes to be used as the foundation of both client and service implementations. In addition, I'll touch on streaming methods and complex message classes. Finally, I'll focus on how to integrate streamed gRPC methods in the UI of a Web client application.