Add cmd/httpget/main.go

Author: devlights

cmd/httpget/main.go

@@ -0,0 +1,60 @@
+//
+// http.Get() を使って HTTP GET リクエストを試してみるサンプルです。
+//
+// リクエストの発行先は JSONPlaceholder (https://jsonplaceholder.typicode.com/) を
+// 使わせてもらっています。
+//
+// REFERENCES:
+//   - https://dev.to/devkiran/make-an-http-get-request-in-go-58gf
+//
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+)
+
+type Post struct {
+	UserId int    `json:"userId"`
+	Id     int    `json:"id"`
+	Title  string `json:"title"`
+	Body   string `json:"body"`
+}
+
+func (me *Post) String() string {
+	return fmt.Sprintf("Uid: %d, Id: %d, Title: %s..., Body: %s...", me.UserId, me.Id, me.Title[:5], me.Body[:5])
+}
+
+const (
+	url = "https://jsonplaceholder.typicode.com/posts/1"
+)
+
+var (
+	appLog = log.New(os.Stderr, "", 0)
+	errLog = log.New(os.Stderr, "[Error] ", 0)
+)
+
+func main() {
+	resp, err := http.Get(url)
+	if err != nil {
+		errLog.Println(err)
+		return
+	}
+	defer resp.Body.Close()
+
+	var (
+		post    = &Post{}
+		decoder = json.NewDecoder(resp.Body)
+	)
+
+	err = decoder.Decode(post)
+	if err != nil {
+		errLog.Println(err)
+		return
+	}
+
+	appLog.Println(post)
+}