go api exercise

go_json_response.json

// this is what main.go returns

{
  "main": {
    "temp": 296.52,
    "pressure": 1002,
    "humidity": 23
  }
}

json2go_struct.go

type AutoGenerated struct {
	Coord struct {
		Lon float64 `json:"lon"`
		Lat float64 `json:"lat"`
	} `json:"coord"`
	Weather []struct {
		ID          int    `json:"id"`
		Main        string `json:"main"`
		Description string `json:"description"`
		Icon        string `json:"icon"`
	} `json:"weather"`
	Base string `json:"base"`
	Main struct {
		Temp      float64 `json:"temp"`
		FeelsLike float64 `json:"feels_like"`
		TempMin   float64 `json:"temp_min"`
		TempMax   float64 `json:"temp_max"`
		Pressure  int     `json:"pressure"`
		Humidity  int     `json:"humidity"`
	} `json:"main"`
	Visibility int `json:"visibility"`
	Wind       struct {
		Speed float64 `json:"speed"`
		Deg   int     `json:"deg"`
		Gust  float64 `json:"gust"`
	} `json:"wind"`
	Clouds struct {
		All int `json:"all"`
	} `json:"clouds"`
	Dt  int `json:"dt"`
	Sys struct {
		Type    int    `json:"type"`
		ID      int    `json:"id"`
		Country string `json:"country"`
		Sunrise int    `json:"sunrise"`
		Sunset  int    `json:"sunset"`
	} `json:"sys"`
	Timezone int    `json:"timezone"`
	ID       int    `json:"id"`
	Name     string `json:"name"`
	Cod      int    `json:"cod"`
}

main.go

package main

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

	"github.com/gin-gonic/gin"
)

type OwmParams struct {
	Token    string `json:"token"`
	Zip_code int    `json:"zip_code"`
}

type weather struct {
	Main struct {
		Temperature float64 `json:"temp"`
		Pressure    int     `json:"pressure"`
		Humidity    int     `json:"humidity"`
	} `json:"main"`
}

func owm(c *gin.Context) {

	var ap OwmParams

	if err := c.ShouldBindJSON(&ap); err != nil {
		c.JSON(400, gin.H{"error with ShouldBindJSON": err.Error()})
		return
	}

	uri := fmt.Sprintf("https://api.openweathermap.org/data/2.5/weather?zip=%s,us&appid=%s", strconv.Itoa(ap.Zip_code), ap.Token)

	res, err := http.Get(uri)
	if err != nil {
		c.JSON(res.StatusCode, gin.H{"error with http.Get": err.Error()})
		return
	}

	defer res.Body.Close() // run last

	bs, err := io.ReadAll(res.Body)

	var w weather
	if err := json.Unmarshal(bs, &w); err != nil {
		c.JSON(400, gin.H{"error with json.Unmarshal": err.Error()})
		return
	}

	j, _ := json.Marshal(w)
	c.Data(200, "application/json", j)

}

func main() {
	router := gin.Default()
	router.POST("/owm/", owm)
	router.Run(":8080")
}

owm_json_response.json

{
  "coord": {
    "lon": -104.9847,
    "lat": 39.7392
  },
  "weather": [
    {
      "id": 800,
      "main": "Clear",
      "description": "clear sky",
      "icon": "01d"
    }
  ],
  "base": "stations",
  "main": {
    "temp": 299.56,
    "feels_like": 299.56,
    "temp_min": 295.76,
    "temp_max": 301.73,
    "pressure": 1002,
    "humidity": 14
  },
  "visibility": 10000,
  "wind": {
    "speed": 1.79,
    "deg": 248,
    "gust": 4.92
  },
  "clouds": {
    "all": 4
  },
  "dt": 1698093960,
  "sys": {
    "type": 2,
    "id": 2002746,
    "country": "US",
    "sunrise": 1698067095,
    "sunset": 1698106201
  },
  "timezone": -21600,
  "id": 0,
  "name": "Denver",
  "cod": 200
}