grpcext is a Go package that provides extensions and utilities for working with gRPC.
To install grpcext, you can use the go get command:
go get github.com/poiati/grpcext
Here's an example of how to use the inspect.FieldsFor function to get the fields of a protocol buffer message:
fooReq := &proto.FooRequest{
Text: "fooValue",
Number: -32,
Flag: true,
LongNumber: -64,
UnsignedNumber: 32,
UnsignedLongNumber: 64,
}
fields := inspect.FieldsFor(fooReq)
fmt.Println(fields)This will output the following:
[
{"text", reflect.String, "fooValue"},
{"number", reflect.Int32, int32(-32)},
{"flag", reflect.Bool, true},
{"long_number", reflect.Int64, int64(-64)},
{"unsigned_number", reflect.Uint32, uint32(32)},
{"unsigned_long_number", reflect.Uint64, uint64(64)},
]
You can find an example in the example folder of this repository. It uses this package for writting an
interceptor that logs the grpc request and response.
$ go run example/main.go
time=2023-10-02T20:55:13.358-03:00 level=DEBUG msg="received GRPC Request" grpc.method=/proto.FooService/DoFoo grpc.req.text=foo grpc.req.number=11 grpc.req.flag=true
time=2023-10-02T20:55:13.358-03:00 level=INFO msg="Doing Foo!" grpc.method=/proto.FooService/DoFoo
time=2023-10-02T20:55:13.358-03:00 level=DEBUG msg="returning GRPC Response" grpc.method=/proto.FooService/DoFoo grpc.res.bar=bar!
There is a simple benchmark set to compare the perf. with and without the interceptor.
go test -bench=. ./example/ -benchmem -benchtime=10s
goos: linux
goarch: amd64
pkg: github.com/poiati/grpcext/example
cpu: AMD Ryzen 5 5600X 6-Core Processor
BenchmarkWithoutInterceptor/grpc_call-12 108408 112382 ns/op 8934 B/op 175 allocs/op
BenchmarkWithIterceptor/grpc_call-12 103459 115325 ns/op 11643 B/op 225 allocs/op
PASS
ok github.com/poiati/grpcext/example 26.414s
For now it just supports basic fields inspection.
- Add support to nested messages
- Add support to lists (repeated)
- Add support to maps
- Add an option to exclude fields
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