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gRPC in 3 minutes (Go) | ||
====================== | ||
# gRPC Hello World | ||
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BACKGROUND | ||
------------- | ||
For this sample, we've already generated the server and client stubs from [helloworld.proto](helloworld/helloworld/helloworld.proto). | ||
Follow these setup to run the [quick start][] example: | ||
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PREREQUISITES | ||
------------- | ||
1. Get the code: | ||
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- This requires Go 1.9 or later | ||
- Requires that [GOPATH is set](https://golang.org/doc/code.html#GOPATH) | ||
```console | ||
$ go get google.golang.org/grpc/examples/helloworld/greeter_client | ||
$ go get google.golang.org/grpc/examples/helloworld/greeter_server | ||
``` | ||
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``` | ||
$ go help gopath | ||
$ # ensure the PATH contains $GOPATH/bin | ||
$ export PATH=$PATH:$GOPATH/bin | ||
``` | ||
2. Run the server: | ||
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INSTALL | ||
------- | ||
```console | ||
$ $(go env GOPATH)/bin/greeter_server & | ||
``` | ||
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``` | ||
$ go get -u google.golang.org/grpc/examples/helloworld/greeter_client | ||
$ go get -u google.golang.org/grpc/examples/helloworld/greeter_server | ||
``` | ||
3. Run the client: | ||
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TRY IT! | ||
------- | ||
```console | ||
$ $(go env GOPATH)/bin/greeter_client | ||
Greeting: Hello world | ||
``` | ||
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- Run the server | ||
For more details (including instructions for making a small change to the | ||
example code) or if you're having trouble running this example, see [Quick | ||
Start][]. | ||
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``` | ||
$ greeter_server & | ||
``` | ||
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- Run the client | ||
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``` | ||
$ greeter_client | ||
``` | ||
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OPTIONAL - Rebuilding the generated code | ||
---------------------------------------- | ||
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1. Install [protobuf compiler](https://github.com/google/protobuf/blob/master/README.md#protocol-compiler-installation) | ||
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1. Install the protoc Go plugin | ||
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``` | ||
$ go get -u github.com/golang/protobuf/protoc-gen-go | ||
``` | ||
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1. Rebuild the generated Go code | ||
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``` | ||
$ go generate google.golang.org/grpc/examples/helloworld/... | ||
``` | ||
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Or run `protoc` command (with the grpc plugin) | ||
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``` | ||
$ protoc -I helloworld/ helloworld/helloworld.proto --go_out=plugins=grpc:helloworld | ||
``` | ||
[quick start]: https://grpc.io/docs/languages/go/quickstart |