如何使用Go語言實作RSETful Server: Creating a RESTful API With Golang

前言

要使用Go建立一個RESTful的Web Server非常地簡單, 只要使用內建的模組net/http就能輕易達成


首先, 匯入相關套件

package main
import (
    "encoding/json"
    "net/http"
)

添加兩個路由"/", "/users", 以及實作兩個handler來處理對應的請求

func handler(w http.ResponseWriter, request *http.Request) {
    w.Write([]byte("Hello world."))
}

func usersHandler(w http.ResponseWriter, request *http.Request) {
    data := make(map[string]interface{})
    data["users"] = []interface{}{
     map[string]interface{}{
         "name": "andy",
         "pwd": "123456",
     },
    }
    jsonByte, _ := json.Marshal(data)
    w.Header().Set("Content-Type", "application/json")
    w.Write(jsonByte)
}


func main() {
    http.HandleFunc("/", handler)
    http.HandleFunc("/users", usersHandler) 
    ...

給定要聽的port

    http.ListenAndServe(":3000", nil)

測試 localhost:3000

 測試localhost:3000/users

完整程式碼

package main

import (
    "encoding/json"
    "net/http"
)

func handler(w http.ResponseWriter, request *http.Request) {
    w.Write([]byte("Hello world."))
}

func usersHandler(w http.ResponseWriter, request *http.Request) {
    data := make(map[string]interface{})
    data["users"] = []interface{}{
     map[string]interface{}{
         "name": "andy",
         "pwd": "123456",
     },
    }
    jsonByte, _ := json.Marshal(data)
    w.Header().Set("Content-Type", "application/json")
    w.Write(jsonByte)
}


func main() {
    http.HandleFunc("/", handler)
    http.HandleFunc("/users", usersHandler) 
    http.ListenAndServe(":3000", nil)
}