Conan - Cache In Go

main.go

@@ -2,18 +2,40 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
 	"log"
 	"net/http"
+	"time"
+
+	"github.com/patrickmn/go-cache"
+)
+
+var (
+	cacheSystem *cache.Cache
+)
+
+const (
+	CacheKeyGithubResponse = "github_response"
+
+	CacheTTLGithubResponse = time.Minute * 3
 )
 
 func github(w http.ResponseWriter, r *http.Request) {
+	cacheData, isFound := getCache(CacheKeyGithubResponse)
+	if isFound {
+		json.NewEncoder(w).Encode(cacheData)
+		return
+	}
+
 	resp, err := http.Get("https://api.github.com/status")
 	if err != nil {
 		json.NewEncoder(w).Encode(err)
 	}
 	data, _ := ioutil.ReadAll(resp.Body)
 	resp.Body.Close()
+
+	setCache(CacheKeyGithubResponse, string(data))
 	json.NewEncoder(w).Encode(string(data))
 }
 
@@ -23,5 +45,24 @@ func handleRequests() {
 }
 
 func main() {
+	initCache()
 	handleRequests()
 }
+
+func initCache() {
+	cacheSystem = cache.New(5*time.Minute, 10*time.Minute)
+	if cacheSystem == nil {
+		log.Fatal("Failed to init cache")
+	}
+}
+
+func setCache(cacheKey string, data string) {
+	cacheSystem.Set(cacheKey, data, CacheTTLGithubResponse)
+	log.Println(fmt.Sprintf("Set cache success for key %s", cacheKey)) // log if needed
+}
+
+func getCache(cacheKey string) (data interface{}, isFound bool) {
+	data, isFound = cacheSystem.Get(cacheKey)
+
+	return data, isFound
+}