grpc-go

What would you like to be added:
A Fault injection filter should provide configurable error injection capabilities, such as delay, error local reply. it is best to have more detailed routing-based configuration capabilities

Why is this needed:
Because this is the ability that is required in the testing phas

If something is passed for Default that can't be converted to a cty.Value, but it can be converted to a schema.SchemaDefaultFunc we could provide a better error message than the existing panic:

panic: can't convert (schema.SchemaDefaultFunc)(0x7b7740) to cty.Value

To let people know that they need to pass this for DefaultFunc, not Default.

怎么添加路由前的管道HandlerFunc？

At the moment this plugin generates two files for each processed *.proto file with names:

• <protofile>_transformer.go
• options.go

In this case it's hard to say were these files auto-generated or weren't by its names.

Use additional file extension for auto-generated files: *.pb.st.go, as a result files should be named as :

• <protofile>.pb.st.go
• options.pb.st.go