check session for login with gorilla sessions

[amir-taghavi]

hi i want write function which check session login in panels page .

in following code i write checklogin and called it on panel function but it not work , while i run localhost:3030/panel page is white

package main

import(

"fmt"

"github.com/gorilla/sessions"

"net/http"

)

var store = sessions.NewCookieStore([]byte("security code"))

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

fmt.Fprintln(w,"login page")

}

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

users,_ := store.Get("admins")

users.Values["login"] = true

users.Save(r,w)

}

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

checklogin(w,r)

fmt.Fprintln(w,"Welcome to panel")

}

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

users,_ := store.Get("admins")

if users.Values["login"]==nil{

http.Redirect(w,r,"/login",http.StatusFound)

}

}

func main(){

http.HandleFunc("/login",login)

http.HandleFunc("/set",login)

http.HandleFunc("/panel",login)

err := http.ListenAndServe(":3030",nil)

if err!=nil{

fmt.Print(err)

}

}

[Nigel Tao]

On Fri, Dec 5, 2014 at 1:08 AM, amir-taghavi <amirtag...@gmail.com> wrote:
> users,_ := store.Get("admins")

This doesn't even compile. Get takes two arguments.
http://godoc.org/github.com/gorilla/sessions#CookieStore.Get

[amir-taghavi]

i change code :

package main

import(

"fmt"

"github.com/gorilla/sessions"

"net/http"

)

var store = sessions.NewCookieStore([]byte("security code"))

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

fmt.Fprintln(w,"login page")

}

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

users,_ := store.Get(r,"admins")

users.Values["login"] = true

users.Save(r,w)

}

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

checklogin(w,r)

fmt.Fprintln(w,"Welcome to panel")

}

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

_,exist := store.Get(r,"admins")

if exist==nil{

http.Redirect(w,r,"/login",http.StatusFound)

}

}

func main(){

http.HandleFunc("/login",login)

http.HandleFunc("/set",set)

http.HandleFunc("/panel",panel)

err := http.ListenAndServe(":3030",nil)

if err!=nil{

fmt.Print(err)

}

}

but it not work

what do i do?

[chris dollin]

On 5 December 2014 at 08:06, amir-taghavi <amirtag...@gmail.com> wrote:
> func main(){
> http.HandleFunc("/login",login)
> http.HandleFunc("/set",set)
> http.HandleFunc("/panel",panel)
> err := http.ListenAndServe(":3030",nil)
> if err!=nil{
> fmt.Print(err)
> }
> }
>
> but it not work
> what do i do?

You tell us exactly what you did and exactly what happened.

"not work" isn't much of a clue.

Chris

--
Chris "allusive" Dollin

[amir-taghavi]

i called localhost:3030/panel and it redirect me to login page

now i called localhost:3030/set and call localhost:3030/panel again it redirect me to login page !!!

[amir-taghavi]

help me please 

[atd...@gmail.com]

check your handlefunc.. you used  the `login` handler function thrice.

On Friday, December 5, 2014 7:44:43 PM UTC, amir-taghavi wrote:

help me please 

[atd...@gmail.com]

Sorry.. didn't see you had changed your code.

Try to print(exist), it's probably nil.

[atd...@gmail.com]

And what is the return value you ignored in the `set` handler ?

[amir-taghavi]

if i ignored set handler i can not access to panel handler 

else if i called set handler i must access to panel handler but panel handler not allow me to see the panel and redirect to login 

[atd...@gmail.com]

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

users,_ := store.Get(r,"admins")

users.Values["login"] = true

users.Save(r,w)

}

"users,_ := "

you're probably ignoring an error value or boolean that test whether you successfuly retrieved user info from store.

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

_,exist := store.Get(r,"admins")

if exist==nil{

http.Redirect(w,r,"/login",http.StatusFound)

}

}

 

if exist is nil, you'll get redirected. exist is probably nil.

You need to carefully review your programs. Don't just copy paste. Make sure you understand every line. 

Happy coding.

[Erfan Akbarimanesh]

do you understand code? 

in programming you must can understand code . for write program you should think to it . then write code

i think you are hasty

 first : practice basic programming on go

i'm sure you can but you should try

your code is wrong . 

_,exist := store.Get(r,"admins")

       if exist==nil{

         http.Redirect(w,r,"/login",http.StatusFound)

   }

please see the following code and think it over:

users,_ := store.Get(r,"admins")

if _,ok := users.Values["login"];!ok{

http.Redirect(w,r,"/login",http.StatusFound)

}

Good Luck

[amir-taghavi]

thank you erfan 

my problem solved