Can filter by project to get a HTTP status code Ok or NotFound

main.go

@@ -199,12 +199,37 @@ func ServeJSONStudent(w http.ResponseWriter, r *http.Request) {
 
 	login := strings.TrimSuffix(strings.TrimPrefix(r.URL.Path, "/"), ".json")
 
-	if j, err := json.Marshal(genStudent(login)); err != nil {
+	var ret []byte
-		http.Error(w, fmt.Sprintf("{errmsg:%q}", err), http.StatusInternalServerError)
+	status := http.StatusOK
+
+	if len(r.URL.Query().Get("rendu")) > 0 {
+		limit := r.URL.Query().Get("rendu")
+		for k, v := range genStudent(login) {
+			if limit == k {
+				r, err := json.Marshal(v)
+				if err != nil {
+					http.Error(w, fmt.Sprintf("{errmsg:%q}", err), http.StatusInternalServerError)
+					return
+				}
+
+				if v == nil {
+					status = http.StatusNotFound
+				}
+
+				ret = append(ret, r...)
+			}
+		}
 	} else {
-		w.WriteHeader(http.StatusOK)
+		var err error
-		w.Write(j)
+		ret, err = json.Marshal(genStudent(login))
+		if err != nil {
+			http.Error(w, fmt.Sprintf("{errmsg:%q}", err), http.StatusInternalServerError)
+			return
+		}
 	}
+
+	w.WriteHeader(status)
+	w.Write(ret)
 }
 
 type arrayFlags []string