remixweather.go

package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"net/http"

	"github.com/gorilla/mux"
)

type coord struct {
	Lat float64 `json:"lat"`
	Lon float64 `json:"lon"`
}

type owmResponse struct {
	Name        string `json:"name"`
	Coordinants coord  `json:"coord"`
	Main        struct {
		Min float64 `json:"temp_min"`
		Max float64 `json:"temp_max"`
	} `json:"main"`
}

var listenOn = "127.0.0.1:8888"

func init() {
	flag.StringVar(&listenOn, "listen", listenOn, "The address to listen on for web requests")
}

func handleRequest(w http.ResponseWriter, r *http.Request) {
	var owmData owmResponse
	vars := mux.Vars(r)
	resp, _ := http.Get(fmt.Sprintf(
		"http://api.openweathermap.org/data/2.5/weather?lat=%s&lon=%s",
		vars["lat"], vars["lon"]))
	dec := json.NewDecoder(resp.Body)
	dec.Decode(&owmData)
	resp.Body.Close()
	log.Printf("%#v", owmData)
	enc, _ := json.Marshal(owmData)
	w.Header().Set("Content-Type", "application/json")
	w.Write(enc)
}

func main() {
	flag.Parse()
	r := mux.NewRouter()
	r.HandleFunc("/get/{lat}/{lon}", handleRequest)
	log.Fatal(http.ListenAndServe(listenOn, r))
}