Intro Golang

README.md

Run

go run main.go

2021/11/15 11:25:02 openWeatherMap: Bucharest: 280.32

main.go

package main

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

type openWeatherMap struct{}

func (w openWeatherMap) temperature(city string) (float64, error) {
	apiKey := "appid=542ffd081e67f4512b705f89d2a611b2"
	resp, err := http.Get("http://samples.openweathermap.org/data/2.5/weather?" + apiKey + "&q=" + city)
	if err != nil {
		return 0, err
	}
	defer resp.Body.Close()
	var d struct {
		Main struct {
			Kelvin float64 `json:"temp"`
		} `json:"main"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&d); err != nil {
		return 0, err
	}
	log.Printf("openWeatherMap: %s: %.2f", city, d.Main.Kelvin)
	return d.Main.Kelvin, nil
}

func main() {
	w := &openWeatherMap{}
	w.temperature("Bucharest")
}