Cara Membuat Aplikasi RSS dengan Golang

Pada tutorial kali ini kita akan menggunakan Golang untuk membuat RSS content dengan Golang. Kita bisa integrasikan pada aplikasi berbasis web yang kita  buat dengan Golang.

Untuk source pertama, kita buat dulu file rss feed.go dengan isi sebagai berikut:

package main
	import (
	"encoding/json"
	"github.com/gorilla/feeds"
	"io/ioutil"
	"log"
	"os"
	"time"
	)
	type FeedsData struct {
	ID string `json:"id"`
	Title string `json:"title"`
	Description string `json:"description"`
	}
	func generateRssFeeds() *feeds.Feed {
	//Initialize RSS Feeds
	feed := &feeds.Feed{
	Title: "RSS Feeds Example",
	Link: &feeds.Link{Href: "/rssFeedsLink"},
	Description: "This is RSS Feeds Example In Go language",
	Author: &feeds.Author{Name: "author"},
	Created: time.Now(),
	}
	//Get JSON data from file, here you can retrieve data from database table also.
	feedsData := getJSONFeedsDataFromFile()
	var feedItems []*feeds.Item
	// Add items to RSS feeds
	for i := 0; i < len(feedsData); i++ {
	item := feedsData[i]
	feedItems = append(feedItems,
	&feeds.Item{
	Id: item.ID,
	Title: item.Title,
	Link: &feeds.Link{Href: "/rssFeedsLink"},
	Description: item.Description,
	Created: time.Now(),
	})
	}
	//Append Items
	feed.Items = feedItems
	return feed
	}
	func getJSONFeedsDataFromFile() []FeedsData {
	//open JSON file
	jsonFile, err := os.Open("feeds.json")
	if err != nil {
	log.Fatal(err)
	}
	//defer the closing of jsonFile, we can parse it later on
	defer jsonFile.Close()
	//read opened jsonFile as a byte array.
	byteValue, _ := ioutil.ReadAll(jsonFile)
	if err != nil {
	log.Fatal(err)
	}
	// defer the closing of our jsonFile so that we can parse it later on
	defer jsonFile.Close()
	var data []FeedsData
	// Unmarshal byteArray into FeedsData
	err = json.Unmarshal(byteValue, &data)
	if err != nil {
	log.Fatal(err)
	}
	return data
	}

dan kemudian gunakan function tersebut dengan membuat file main.go:

package main
	import (
	"fmt"
	"github.com/gorilla/feeds"
	)
	func main() {
	//generate RSS feeds data from JSON file
	feedsData := generateRssFeeds()
	/*
	convert it to RSS.
	github.com/gorilla/feeds also provides methods for converting to RSS, JSON and Atom
	*/
	rssFeed := (&feeds.Rss{Feed: feedsData}).RssFeed()
	// Printing response to XML
	xmlRssFeeds := rssFeed.FeedXml()
	fmt.Println(xmlRssFeeds)
	}

dan coba.