Working with APIs and Parsing JSON Data in Golang (with RapidAPI & Hacker News)

hackernews.go

// REFERENCE (Parsing JSON in Golang): https://www.sohamkamani.com/blog/2017/10/18/parsing-json-in-golang/
// REFERENCE (Cast Int as String in Golang): https://yourbasic.org/golang/convert-int-to-string/

package main

import (
	"fmt"
	"net/http"
	"io/ioutil"
	"encoding/json"
	"strconv"
)

type TopStories struct {
	Story []int
}

type Story struct {
	By string
	Descendants int
	Id int
	Kids []int
	Score int
	Title string
	Type string
	URL string
}

func main() {

        // ---------------------------------------------------------------------
        // Hit the top stories endpoint for the Hacker News API 
        // via RapidAPI to get the story ids for the top stories
        // today trending on Hacker News
        // ---------------------------------------------------------------------
        url := "https://community-hacker-news-v1.p.rapidapi.com/topstories.json?print=pretty"
        // Create Request
        request, _ := http.NewRequest("GET", url, nil)
        request.Header.Add("x-rapidapi-host", "community-hacker-news-v1.p.rapidapi.com")
        request.Header.Add("x-rapidapi-key", "YouR-SuPER-SWeeT-RaPiDaPi-KeY-GoeS-HeRe")
        // Get Result, Result Body, and Result Body String
        result, _ := http.DefaultClient.Do(request)
        defer result.Body.Close()
        resultBody, _ := ioutil.ReadAll(result.Body)
        resultBodyStr := string(resultBody)
        // Create an array to store our topStories,
        // then append the story ids to our array
        // using json.Unmarshall
        var topStories []int
        json.Unmarshal([]byte(resultBodyStr), &topStories)
        // ---------------------------------------------------------------------

        // ---------------------------------------------------------------------
        // Next, Let's fetch some information about the top trending story on
        // Hacker News. TODO: Fetch data for ALL the trending stories on HN
        // ---------------------------------------------------------------------
        var topStoryID string = strconv.Itoa(topStories[0])
        url = "https://community-hacker-news-v1.p.rapidapi.com/item/" + topStoryID + ".json?print=pretty"
        request, _ = http.NewRequest("GET", url, nil)
        request.Header.Add("x-rapidapi-host", "community-hacker-news-v1.p.rapidapi.com")
        request.Header.Add("x-rapidapi-key", "YouR-SuPER-SWeeT-RaPiDaPi-KeY-GoeS-HeRe")
        result, _ = http.DefaultClient.Do(request)
        defer result.Body.Close()
        resultBody, _ = ioutil.ReadAll(result.Body)
        resultBodyStr = string(resultBody)
        // ---------------------------------------------------------------------

        // ---------------------------------------------------------------------
        // Now, let's parse the top story...
        // ---------------------------------------------------------------------
        var topStory Story
        json.Unmarshal([]byte(resultBodyStr), &topStory)
        fmt.Println("Top Story...")
        fmt.Printf("Title: %s\n", topStory.Title)
        fmt.Printf("URL: %s\n", topStory.URL)
        // ---------------------------------------------------------------------
}