feat(server): add http server and req handler

main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"net/http"
+)
+
+func main() {
+
+	http.HandleFunc("/", RequestHandler)
+	http.ListenAndServe(":3333", nil)
+}

request_handler.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/gabdlr/api-cuit-go/rate_limit"
+)
+
+type CuitError struct {
+	Error string `json:"error"`
+}
+
+const NO_SEARCH_ARG = "Sin argumento de búsqueda"
+
+func RequestHandler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+
+	errorResponse := &CuitError{Error: "Fallo exitosamente"}
+	argument := r.URL.Path
+
+	if len(argument) == 1 {
+		errorResponse.Error = NO_SEARCH_ARG
+	} else {
+		remoteAddr := (strings.Split(r.RemoteAddr, ":"))[0]
+		timeLeft := rate_limit.TimeLeft(remoteAddr)
+
+		if timeLeft > 0 {
+			errorResponse.Error = fmt.Sprintf("Recurso no disponible, debe esperar %v segundos", timeLeft)
+		}
+	}
+
+	jsonResponse, _ := json.Marshal(errorResponse)
+	w.Write(jsonResponse)
+}