如何在不同的包中使用 Golang 中的 Gorilla Sessions [英] How to use Gorilla Sessions in Golang in different packages

问题描述

我有主包(main.go):

I have main package (main.go):

package main

import (
  "github.com/gorilla/sessions"
  ...
)

func main() {
  var store = sessions.NewCookieStore([]byte("secret"))

  http.HandleFunc("/", routes.Index)

  http.ListenAndServe(":8080", nil)
  ...

我还有另一个包(index.go):

And I have another package (index.go):

package routes

import (
  "github.com/gorilla/sessions"
  ..
)

func Index(res http.ResponseWriter, req *http.Request) {
  session, _ := store.Get(req, "session-name")
  ...

如何从另一个包中获取会话值?或者我应该把它传递给我的处理程序(如果是怎么做?).

How can I get session value from another package? Or should I pass it to my Handler (if yes how to do it?).

我是 Golang 的新手.请帮忙.

I am new in Golang. Please, help.

推荐答案

我通常将我的依赖项包装在他们自己的包中，这让我可以抽象出我所做的一些常见事情.对于会话，我通常大部分时间使用相同的会话名称，因此我通常会使用以下内容:

I generally wrap my dependencies in their own package, which let's me abstract away some of the common things I do. For sessions, I usually use the same session name most of the time, so I would usually have something like this:

package sessions

import (
    "os"
    gsessions "github.com/gorilla/sessions"
)

var store = gsessions.NewCookieStore([]byte(os.Getenv("SESSION_KEY")))

func Get(req *http.Request) (*gsessions.Session, error) {
    return store.Get(req, "default-session-name")
}

func GetNamed(req *http.Request, name string) (*gsessions.Session, error) {
    return store.Get(req, name)
}

然后你可以在其他任何地方导入你自己的会话包:

And then anywhere else you can just import your own sessions package:

import (
    "net/http"
    "github.com/yourpackage/sessions"
)

func Index(rw http.ResponseWriter, r *http.Request) {
    session, err := sessions.Get(r)
    if err != nil {
        panic(err)
    }
    session.Values["test"] = "test"
    session.Save(r, rw)
}

更好的做法是只从会话中返回某种类型的 interface，并完全包装 gorilla/sessions，这样除了您自己的会话包.

Even better would be to only return an interface of some sort from sessions, and completely wrap the gorilla/sessions so that aren't dependent on it anywhere except for your own sessions package.

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