first commit

.gitignore

@@ -0,0 +1 @@
+vendor/

Dockerfile

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+FROM golang:alpine AS builder
+
+# Set necessary environmet variables needed for our image
+ENV GO111MODULE=on \
+    CGO_ENABLED=0 \
+    GOOS=linux \
+    GOARCH=amd64
+
+# Move to working directory /build
+WORKDIR /build
+
+# Copy and download dependency using go mod
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+
+# Copy the code into the container
+COPY . .
+
+# Run test
+RUN go test ./...
+
+# Build the application
+RUN go build -o main .
+
+# Move to /dist directory as the place for resulting binary folder
+WORKDIR /dist
+
+# Copy binary from build to main folder
+RUN cp /build/main .
+
+############################
+# STEP 2 build a small image
+############################
+FROM scratch
+
+COPY --from=builder /dist/main /
+COPY ./database/data.json /database/data.json
+
+# Command to run the executable
+ENTRYPOINT ["/main"]

database/data.json

@@ -0,0 +1,13 @@
+[{
+        "name": "cat",
+        "sound": "meow"
+    },
+    {
+        "name": "dog",
+        "sound": "woof"
+    },
+    {
+        "name": "cow",
+        "sound": "mooo"
+    }
+]

database/database.go

@@ -0,0 +1,54 @@
+package database
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+)
+
+type (
+	animal struct {
+		Name  string `json:"name"`
+		Sound string `json:"sound"`
+	}
+)
+
+var animals []animal
+
+func init() {
+	wd, err := os.Getwd()
+	if err != nil {
+		er(err)
+	}
+
+	file, err := os.Open(fmt.Sprintf("%v/database/data.json", wd))
+	if err != nil {
+		er(err)
+	}
+
+	byteFile, _ := ioutil.ReadAll(file)
+	if err != nil {
+		er(err)
+	}
+
+	err = json.Unmarshal(byteFile, &animals)
+	if err != nil {
+		er(err)
+	}
+}
+
+func GetAnimal(name string) (*animal, error) {
+	for _, v := range animals {
+		if name == v.Name {
+			return &v, nil
+		}
+	}
+	return nil, errors.New("No animal found")
+}
+
+func er(msg interface{}) {
+	fmt.Println("Error:", msg)
+	os.Exit(1)
+}

go.mod

@@ -0,0 +1,5 @@
+module github.com/afdolriski/golang-docker
+
+go 1.13
+
+require github.com/gin-gonic/gin v1.5.0

go.sum

@@ -0,0 +1,38 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
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+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
+gopkg.in/go-playground/validator.v9 v9.29.1 h1:SvGtYmN60a5CVKTOzMSyfzWDeZRxRuGvRQyEAKbw1xc=
+gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
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main.go

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+package main
+
+import (
+	"github.com/afdolriski/golang-docker/database"
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	r := gin.Default()
+	r.GET("/ping", func(c *gin.Context) {
+		c.JSON(200, gin.H{
+			"message": "pong",
+		})
+	})
+
+	r.GET("/animal/:name", func(c *gin.Context) {
+		animal, err := database.GetAnimal(c.Param("name"))
+		if err != nil {
+			c.String(404, err.Error())
+			return
+		}
+		c.JSON(200, animal)
+	})
+
+	r.Run(":3000")
+}