Martini oauth2callback 适配GAE后重定向到oauth2error

Question

下面的代码在本地服务器上完美运行，但是当适应 Google 应用引擎时（func main 更改为 init 并且包名称从 main 设置为测试应用程序）oauth2callback 请求不再工作，下面的请求被重定向到 oauth2error 处理程序。

http://testapp.com/oauth2callback?code=OAUTHRESPONSEFROMFACEBOOK&state=%2F

package testapp

import (

    "github.com/go-martini/martini"

    goauth2 "github.com/golang/oauth2"

    "github.com/martini-contrib/oauth2"

    "github.com/martini-contrib/sessions"

    "net/http"

)

func init() {

    m := martini.Classic()

    m.Use(sessions.Sessions("my_session", sessions.NewCookieStore([]byte("secret123"))))

    m.Use(oauth2.Facebook(

        goauth2.Client("AppID", "AppSecret"),

        goauth2.RedirectURL("http://testapp.com/oauth2callback"),

        goauth2.Scope("email,user_birthday,user_friends,publish_actions,user_location,user_photos"),

    ))

    // Tokens are injected to the handlers

    m.Get("/", func(tokens oauth2.Tokens) string {

        if tokens.Expired() {

            return "not logged in, or the access token is expired"

        }

        return "logged in"

    })

    // Routes that require a logged in user

    // can be protected with oauth2.LoginRequired handler.

    // If the user is not authenticated, they will be

    // redirected to the login path.

    m.Get("/restrict", oauth2.LoginRequired, func(tokens oauth2.Tokens) string {

        return tokens.Access()

    })

    http.Handle("/", m)

}

Answer 1

我的猜测是您需要将 App Engine 上下文注入 Get 方法。根据Go Martini repo 上的这个问题，您可以执行以下操作：func AppEngine(m martini.Context, r *http.Request) {    m.MapTo(appengine.NewContext(r), (*appengine.Context)(nil))}func init() {    m := martini.Classic()    m.Use(AppEngine)    // ...    m.Get("/", func(tokens oauth2.Tokens, c appengine.Context) string {        if tokens.Expired() {            return "not logged in, or the access token is expired"        }        return "logged in"    })    m.Get("/restrict", oauth2.LoginRequired, func(tokens oauth2.Tokens, c appengine.Context) string {        return tokens.Access()    })}