Go: Simple RESTful API

Creating a Simple RESTful API in Go - Part 1

基本架/跑起來~~~

• go: http

  • net/http

package main

import (
	"fmt"
	"log"
	"net/http"
)

func homePage(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Homepage Endpoint hit")
}

func handleRequests() {
	http.HandleFunc("/", homePage)
	log.Fatal(http.ListenAndServe(":8081", nil))
}

func main() {
	handleRequests()
}

成功!

開一個 抓 json

• go: struct 的第三個參數!?

  • struct tag:

        type StructTag struct {
            StructTag string `json:"StructTag"`
        }
    

  • Struct types:

    A field declaration may be followed by an optional string literal tag, which becomes an attribute for all the fields in the corresponding field declaration.

    The tags are made visible through a reflection interface and take part in type identity for structs but are otherwise ignored.

package main

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


type Article struct {
	Title   string `json:"Title"`
	Desc    string `json:"desc"`
	Content string `json:"content"`
}

type Articles []Article

func allArticles(w http.ResponseWriter, r *http.Request) {
	articles := Articles{
		Article{Title: "Test Title", Desc: "Test Description", Content: "Hello World"},
	}

	fmt.Println("Endpoint Hit: All Articles Endpoint")
	json.NewEncoder(w).Encode(articles)
}

func homePage(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Homepage Endpoint hit")
}

func handleRequests() {
	http.HandleFunc("/", homePage)
	http.HandleFunc("/articles", allArticles)
	log.Fatal(http.ListenAndServe(":8081", nil))
}

func main() {
	handleRequests()
}

GOOD~~~

Creating a Simple RESTful API in Go - Part 2

mux: github.com/gorilla/mux

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"github.com/gorilla/mux"
)

type Article struct {
	Title   string `json:"Title"`
	Desc    string `json:"desc"`
	Content string `json:"content"`
}

type Articles []Article

func allArticles(w http.ResponseWriter, r *http.Request) {
	articles := Articles{
		Article{Title: "Test Title", Desc: "Test Description", Content: "Hello World"},
	}

	fmt.Println("Endpoint Hit: All Articles Endpoint")
	json.NewEncoder(w).Encode(articles)
}

func testPostArticles(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Test Post endpoint hit")
}

func homePage(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Homepage Endpoint hit")
}

func handleRequests() {

	myRouter := mux.NewRouter().StrictSlash(true)

	myRouter.HandleFunc("/", homePage)
	myRouter.HandleFunc("/articles", allArticles).Methods("GET")
	myRouter.HandleFunc("/articles", testPostArticles).Methods("POST")
	log.Fatal(http.ListenAndServe(":8081", myRouter))
}

func main() {
	handleRequests()
}

Cool~~~