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Setting cookies with net/http

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说谎 2020-12-12 23:12

I\'m trying to set cookies with Go\'s net/http package. I have:

package main

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

func indexHandler(w http.Res
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7条回答
  • 攒了一身酷
    2020-12-12 23:52

    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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  • 夕颜
    2020-12-12 23:52

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

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  • 轻奢々
    2020-12-12 23:57

    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)
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  • 爱一瞬间的悲伤
    2020-12-13 00:06

    This Below code helps u 

        cookie1 := &http.Cookie{Name: "sample", Value: "sample", HttpOnly: false}
    http.SetCookie(w, cookie1)
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  • 情深已故
    2020-12-13 00:10 
    //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

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  • 执念已碎
    2020-12-13 00:10

    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)

    // ...
}
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