Cookies 如何在Go中检索cookie?
我在以Cookies 如何在Go中检索cookie?,cookies,go,Cookies,Go,我在以tmpl.Execute开头的行中得到undefined:msg错误。你应该如何在围棋中找回饼干 func contact(w http.ResponseWriter, r *http.Request) { if r.Method == "POST" { r.ParseForm() for k, v := range r.Form { fmt.Println("k:", k, "v:", v) }
tmpl.Execute
开头的行中得到undefined:msg
错误。你应该如何在围棋中找回饼干
func contact(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" {
r.ParseForm()
for k, v := range r.Form {
fmt.Println("k:", k, "v:", v)
}
http.SetCookie(w, &http.Cookie{Name: "msg", Value: "Thanks"})
http.Redirect(w, r, "/contact/", http.StatusFound)
}
if msg, err := r.Cookie("msg"); err != nil {
msg := ""
}
tmpl, _ := template.ParseFiles("templates/contact.tmpl")
tmpl.Execute(w, map[string]string{"Msg": msg})
}
如果,则应在
之外声明msg
:
func contact(w http.ResponseWriter, r *http.Request) {
var msg *http.Cookie
if r.Method == "POST" {
r.ParseForm()
for k, v := range r.Form {
fmt.Println("k:", k, "v:", v)
}
http.SetCookie(w, &http.Cookie{Name: "msg", Value: "Thanks"})
http.Redirect(w, r, "/contact/", http.StatusFound)
}
msg, err := r.Cookie("msg")
if err != nil {
// we can't assign string to *http.Cookie
// msg = ""
// so you can do
// msg = &http.Cookie{}
}
tmpl, _ := template.ParseFiles("templates/contact.tmpl")
tmpl.Execute(w, map[string]string{"Msg": msg.String()})
}
没有必要使用var msg*http.Cookie
行,因为它可以在msg,err:=r.Cookie(“msg”)
中定义。顺便说一句,您可能会发现gorilla/sessions很有用:-简单的API,如果需要,您可以(非常容易)将CookieStore更改为Redis/DB/其他服务器端存储。