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