使用 net/http 设置 Cookie

我正在尝试用 Go 的 net/http 软件包设置 cookies。我有:

package main


import "io"
import "net/http"
import "time"


func indexHandler(w http.ResponseWriter, req *http.Request) {
expire := time.Now().AddDate(0, 0, 1)
cookie := http.Cookie{"test", "tcookie", "/", "www.domain.com", expire, expire.Format(time.UnixDate), 86400, true, true, "test=tcookie", []string{"test=tcookie"}}
req.AddCookie(&cookie)
io.WriteString(w, "Hello world!")
}


func main() {
http.HandleFunc("/", indexHandler)
http.ListenAndServe(":80", nil)
}

我尝试用“ cookies”搜索“ Golang”，但没有得到任何好的结果。如果有人能给我指明正确的方向，我将不胜感激。

112537 次浏览
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最佳答案

I am not a Go expert, but I think you are setting the cookie on the request, aren't you? You might want to set it on the response. There is a setCookie function in net/http. This might help: http://golang.org/pkg/net/http/#SetCookie

func SetCookie(w ResponseWriter, cookie *Cookie)
小开

This Below code helps u 

    cookie1 := &http.Cookie{Name: "sample", Value: "sample", HttpOnly: false}
http.SetCookie(w, cookie1)
小开 
//ShowAllTasksFunc is used to handle the "/" URL which is the default ons
func ShowAllTasksFunc(w http.ResponseWriter, r *http.Request){
if r.Method == "GET" {
context := db.GetTasks("pending") //true when you want non deleted notes
if message != "" {
context.Message = message
}
context.CSRFToken = "abcd"
message = ""
expiration := time.Now().Add(365 * 24 * time.Hour)
cookie    :=    http.Cookie{Name: "csrftoken",Value:"abcd",Expires:expiration}
http.SetCookie(w, &cookie)
homeTemplate.Execute(w, context)
} else {
message = "Method not allowed"
http.Redirect(w, r, "/", http.StatusFound)
}
}

There is a basic difference between Requests and ResponseWriter, a Request is what a browser will send like 

Host: 127.0.0.1:8081
User-Agent: ...
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Referer: http://127.0.0.1:8081/
Cookie: csrftoken=abcd
Connection: keep-alive

and a response is what the handler will send, something like :

Content-Type: text/html; charset=utf-8
Date: Tue, 12 Jan 2016 16:43:53 GMT
Set-Cookie: csrftoken=abcd; Expires=Wed, 11 Jan 2017 16:43:53 GMT
Transfer-Encoding: chunked
<html>...</html>

When the browser will make a request, it'll include the cookie for that domain, since cookies are stored domain wise and can't be accessed from cross domains, if you set a cookie as HTTP only then it can only be accessed from the website which set it via HTTP and not via JS.

So when getting information from cookies you can do that from the r.Cookie method, like this

cookie, _ := r.Cookie("csrftoken")
if formToken == cookie.Value {

https://github.com/thewhitetulip/Tasks/blob/master/views/addViews.go#L72-L75

But when you are going to set a cookie, you have to do it in the response writer method, the request is a read only object which we respond to, think of it as a text message you get from someone, that is a request, you can only get it, what you type is a response, so you can type in a cookie at

for more details: https://thewhitetulip.gitbooks.io/webapp-with-golang-anti-textbook/content/content/2.4workingwithform.html

小开

You can use gorilla package for handling cookies or i would say secure cookies: http://www.gorillatoolkit.org/pkg/securecookie

小开

Below shows how we use cookie in our product:

func handleFoo(w http.ResponseWriter, r *http.Request) {


// cookie will get expired after 1 year
expires := time.Now().AddDate(1, 0, 0)


ck := http.Cookie{
Name: "JSESSION_ID",
Domain: "foo.com",
Path: "/",
Expires: expires,
}


// value of cookie
ck.Value = "value of this awesome cookie"


// write the cookie to response
http.SetCookie(w, &ck)


// ...
}
小开

It was not working for me in Safari until I added the Path and MaxAge. Both secure and regular cookies worked for me

Sharing so that it helps someone who is stuck like me for more than 2 days :)

expire := time.Now().Add(20 * time.Minute) // Expires in 20 minutes
cookie := http.Cookie{Name: "username", Value: "nonsecureuser", Path: "/", Expires: expire, MaxAge: 86400}
http.SetCookie(w, &cookie)
cookie = http.Cookie{Name: "secureusername", Value: "secureuser", Path: "/", Expires: expire, MaxAge: 86400, HttpOnly: true, Secure: true}
http.SetCookie(w, &cookie)
小开

First, you need to create Cookie and then using http package's SetCookie() function you can set the cookie.

expire := time.Now().Add(10 * time.Minute)
cookie := http.Cookie{Name: "User", Value: "John", Path: "/", Expires: expire, MaxAge: 90000}
http.SetCookie(w, &cookie)

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