--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Dockerfile	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,20 @@
+FROM golang:1.13.1  
+  
+RUN apt-get update && apt-get install -y unzip  
+  
+# Install protobuf  
+# @see https://github.com/yoshi42662/go-grpc/blob/master/server/Dockerfile  
+RUN mkdir -p /tmp/protoc && \  
+  curl -L https://github.com/protocolbuffers/protobuf/releases/download/v3.10.0/protoc-3.10.0-linux-x86_64.zip > /tmp/protoc/protoc.zip && \  
+  cd /tmp/protoc && \  
+  unzip protoc.zip && \  
+  cp /tmp/protoc/bin/protoc /usr/local/bin && \  
+  chmod go+rx /usr/local/bin/protoc && \  
+  cd /tmp && \  
+  rm -r /tmp/protoc  
+  
+WORKDIR /study-grpc  
+COPY . /study-grpc  
+  
+RUN go get -u google.golang.org/grpc  
+RUN go get -u github.com/golang/protobuf/protoc-gen-go

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client.go	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,27 @@
+package main  
+  
+import (  
+    "context"  
+    "fmt"
+    "google.golang.org/grpc"
+    "log"
+    "os"
+    cat "study-grpc/pb"  
+)  
+  
+func main() {  
+    port := os.Getenv("SERVER")
+    conn, err := grpc.Dial(port, grpc.WithInsecure())  
+    if err != nil {  
+        log.Fatal("connection error:", err)  
+    }  
+    defer conn.Close()  
+  
+    client := cat.NewCatClient(conn)  
+    message := &cat.GetMyCatMessage{TargetCat: "mike"}  
+    res, err := client.GetMyCat(context.Background(), message)  
+    if err != nil {  
+        log.Fatal(err)  
+    }  
+    fmt.Printf("result:%s\n", res)  
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docker-compose.yml	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,21 @@
+version: '3.7'  
+  
+services:  
+  server:  
+    build: .  
+    container_name: "server"  
+    ports:  
+      - 1234:1234  
+    volumes:  
+      - .:/study-grpc  
+    command: bash scripts/server.sh
+    tty: true
+  client:
+    build: .
+    container_name: "client"  
+    environment:
+      SERVER: server:1234
+    volumes:  
+      - .:/study-grpc  
+    command: bash scripts/client.sh
+    tty: true

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/go.mod	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,8 @@
+module study-grpc
+
+go 1.13
+
+require (
+	github.com/golang/protobuf v1.3.2
+	google.golang.org/grpc v1.24.0
+)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pb/cat.proto	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,14 @@
+syntax = "proto3";  
+  
+service Cat {  
+    rpc GetMyCat (GetMyCatMessage) returns (MyCatResponse) {}  
+}  
+  
+message GetMyCatMessage {  
+    string target_cat = 1;  
+}  
+  
+message MyCatResponse {  
+    string name = 1;  
+    string kind = 2;  
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/client.sh	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,5 @@
+ls
+go build client.go
+ls -l 
+ls -l scripts
+./client

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/server.sh	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,2 @@
+go build server.go
+./server

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/server.go	Mon Dec 16 19:19:32 2019 +0900
@@ -0,0 +1,40 @@
+package main  
+  
+import (  
+    "context"  
+    "errors"
+    "google.golang.org/grpc"
+    "log"
+    "net"
+    cat "study-grpc/pb"  
+)  
+  
+type myCatService struct{}  
+  
+func (s *myCatService) GetMyCat(ctx context.Context, message *cat.GetMyCatMessage) (*cat.MyCatResponse, error) {  
+    switch message.TargetCat {  
+    case "tama":  
+        return &cat.MyCatResponse{  
+            Name: "tama",  
+            Kind: "Maine Coon",  
+        }, nil  
+    case "mike":  
+        return &cat.MyCatResponse{  
+            Name: "mike",  
+            Kind: "Norwegian Forest Cat",  
+        }, nil  
+    default:  
+        return nil, errors.New("Not Found YourCat..")  
+    }  
+}  
+  
+func main() {  
+    port, err := net.Listen("tcp", ":1234")  
+    if err != nil {  
+        log.Println(err.Error())  
+        return  
+    }
+    s := grpc.NewServer()  
+    cat.RegisterCatServer(s, &myCatService{})  
+    s.Serve(port)  
+}