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‎.gitignore

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.idea

‎README.md

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# grpc-go
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grpc-go is a tutorial repository, demonstrating how to create a gRPC server and client in Go. The publication for this repository can be found [here](https://pascalallen.medium.com/how-to-build-a-grpc-server-in-go-943f337c4e05).
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## Prerequisites
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- [Go](https://go.dev/dl/)
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## gRPC server and client usage
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### Run the project's gRPC server from project root
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```bash
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go run server/main.go
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```
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### Execute the project's gRPC client request from project root
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```bash
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go run client/main.go
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```

‎client/main.go

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package main
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import (
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"context"
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pb "github.com/pascalallen/grpc-go/helloworld"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"log"
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"time"
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)
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func main() {
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conn, err := grpc.Dial("localhost:50051", grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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log.Fatalf("failed to connect to gRPC server at localhost:50051: %v", err)
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}
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defer conn.Close()
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c := pb.NewHelloWorldServiceClient(conn)
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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r, err := c.SayHello(ctx, &pb.HelloWorldRequest{})
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if err != nil {
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log.Fatalf("error calling function SayHello: %v", err)
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}
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log.Printf("Response from gRPC server's SayHello function: %s", r.GetMessage())
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}

‎go.mod

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module github.com/pascalallen/grpc-go
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go 1.21.1
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require (
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google.golang.org/grpc v1.58.2
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google.golang.org/protobuf v1.31.0
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)
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require (
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github.com/golang/protobuf v1.5.3 // indirect
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golang.org/x/net v0.12.0 // indirect
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golang.org/x/sys v0.10.0 // indirect
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golang.org/x/text v0.11.0 // indirect
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google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect
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)

‎go.sum

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github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
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github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
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github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
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github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
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github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
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golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
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golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
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golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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golang.org/x/text v0.11.0 h1:LAntKIrcmeSKERyiOh0XMV39LXS8IE9UL2yP7+f5ij4=
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golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
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golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 h1:bVf09lpb+OJbByTj913DRJioFFAjf/ZGxEz7MajTp2U=
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google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98/go.mod h1:TUfxEVdsvPg18p6AslUXFoLdpED4oBnGwyqk3dV1XzM=
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google.golang.org/grpc v1.58.2 h1:SXUpjxeVF3FKrTYQI4f4KvbGD5u2xccdYdurwowix5I=
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google.golang.org/grpc v1.58.2/go.mod h1:tgX3ZQDlNJGU96V6yHh1T/JeoBQ2TXdr43YbYSsCJk0=
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google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
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google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
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google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
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google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=

‎helloworld/helloworld.pb.go

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‎helloworld/helloworld.proto

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syntax = "proto3";
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option go_package = "github.com/pascalallen/grpc-go/helloworld";
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package helloworld;
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service HelloWorldService {
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rpc SayHello(HelloWorldRequest) returns (HelloWorldResponse) {}
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}
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message HelloWorldRequest {}
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message HelloWorldResponse {
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string message = 1;
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}

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