Draft Go HTTP server

go-http/httpserver.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"github.com/patrickmn/go-cache"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"time"
+)
+
+const stacoURL string = "http://127.0.0.1:8100"
+
+var countCache = cache.New(5*time.Minute, 10*time.Minute)
+
+func commentsCount(w http.ResponseWriter, r *http.Request) {
+
+	// only GET method is supported
+	if r.Method != "GET" {
+		http.NotFound(w, r)
+		return
+	}
+
+	// set header
+	w.Header().Add("Content-Type", "application/json")
+	w.Header().Add("Access-Control-Allow-Origin", "*")
+
+	// get cached value
+	cachedBody, found := countCache.Get(r.URL.String())
+	if found {
+		//log.Printf("return cached value")
+		w.Write([]byte(cachedBody.(string)))
+		return
+	}
+
+	// relay request to stacosys
+	response, err := http.Get(stacoURL + r.URL.String())
+	if err != nil {
+		http.NotFound(w, r)
+		return
+	}
+	defer response.Body.Close()
+	body, err := ioutil.ReadAll(response.Body)
+	if err != nil {
+		http.NotFound(w, r)
+		return
+	}
+
+	// cache body and return response
+	countCache.Set(r.URL.String(), string(body), cache.DefaultExpiration)
+	log.Printf(string(body))
+	w.Write(body)
+}
+
+func comments(w http.ResponseWriter, r *http.Request) {
+	io.WriteString(w, "Hello world!")
+}
+
+func main() {
+	http.HandleFunc("/comments/count", commentsCount)
+	http.HandleFunc("/comments", comments)
+	http.ListenAndServe(":8200", nil)
+}