go实现表单验证

package main import ( "fmt" "html/template" "log" "net/http" "regexp" "strconv" ) func sayHelloName(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "hello box") } func login(w http.ResponseWriter, r *http.Request) { if r.Method == "GET" { t, _ := template.ParseFiles("login.html") t.Execute(w, nil) } else if r.Method == "POST" { username := r.FormValue("username") password := r.FormValue("password") phone := r.FormValue("phone") like := r.FormValue("like") sex := r.FormValue("sex") utype := r.FormValue("utype") fmt.Println(like) fmt.Println(sex) fmt.Println(utype) //获取年龄之后转成int型 age, err := strconv.Atoi(r.FormValue("age")) if err != nil { w.Write([]byte("数字转化出错了，那么可能就不是数字")) return } if username == "" || password == "" || age == 0 { w.Write([]byte("username and password and age must not null")) return } //获取数据判定大小 if age > 100 { w.Write([]byte("age is to big")) return } if m, _ := regexp.MatchString(`^(1[3|4|5|8][0-9]\d{4,8})$`, phone); !m { w.Write([]byte("phone is error")) return } } else { fmt.Println("error") } } func main() { http.HandleFunc("/", sayHelloName) http.HandleFunc("/login", login) err := http.ListenAndServe(":8081", nil) if err != nil { log.Fatal("ListenAndServe:", err) } }