go - oauth2 无法获取令牌：错误请求

Question

我编写了一个回调处理程序以使用 Google 帐户登录：

func GoogleCallbackHandler(w http.ResponseWriter, r *http.Request) {
    conf:=&oauth2.Config{
        ClientID:"700740834863-m4om9r91htn19htq2b6a05fu6vu4j7i5.apps.googleusercontent.com",
        ClientSecret:"...-rB",
        RedirectURL:"http://localhost:3000/auth/google/callback",
        Scopes:[]string{"profile"},
        Endpoint:google.Endpoint,
    }

    fmt.Println(conf.AuthCodeURL("state"))

    code := r.URL.Query().Get("code")

    token, err := conf.Exchange(oauth2.NoContext, code)
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    client := conf.Client(oauth2.NoContext, token)
    resp, err := client.Get("https://www.googleapis.com/userinfo/v2/me")
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    raw, err := ioutil.ReadAll(resp.Body)
    defer resp.Body.Close()
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    var profile map[string]interface{}
    if err := json.Unmarshal(raw, &profile); err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    session, _ := util.GlobalSessions.SessionStart(w, r)
    defer session.SessionRelease(w)

    session.Set("id_token", token.Extra("id_token"))
    session.Set("access_token", token.AccessToken)
    session.Set("profile", profile)

    // // Redirect to logged in page

    http.Redirect(w, r, "/user", http.StatusMovedPermanently)
}

在main，我服务处理程序

http.HandleFunc("/",route.IndexHandler)
http.HandleFunc("/auth/google/",route.GoogleCallbackHandler)
http.Handle("/user",negroni.New(
    negroni.HandlerFunc(route.IsAuthenticated),
    negroni.Wrap(http.HandlerFunc(route.UserHandler)),
))

我遇到了与我的旧问题相同的问题：

oauth2: cannot fetch token: 400 Bad Request
Response: {
  "error" : "invalid_request",
  "error_description" : "Missing required parameter: code"
}

我上次问过这个问题后，用我上面的代码搞定了，访问和获取数据成功了，但是昨晚突然又报这个错，不明白为什么不能用了在过去几天使用完全相同的代码后

如何从 AuthCodeURL 获取 code？有没有办法在不重定向到任何其他处理程序的情况下获取用于交换的代码？我想在一个这个处理程序中处理所有事情

Answer 1

我可以通过添加一个处理程序来解决它

var (
    conf *oauth2.Config
)

func GoogleCallbackHandler(w http.ResponseWriter, r *http.Request) {
    conf=&oauth2.Config{
        ClientID:"700740834863-m4om9r91htn19htq2b6a05fu6vu4j7i5.apps.googleusercontent.com",
        ClientSecret:"...-rB",
        RedirectURL:"http://localhost:3000/auth/google/callback",
        Scopes:[]string{"profile"},
        Endpoint:google.Endpoint,
    }

    http.Redirect(w, r, conf.AuthCodeURL("state"), http.StatusMovedPermanently)
}

func GoogleLoginHandler(w http.ResponseWriter, r *http.Request) {
    code := r.URL.Query().Get("code")

    token, err := conf.Exchange(oauth2.NoContext, code)
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    client := conf.Client(oauth2.NoContext, token)
    resp, err := client.Get("https://www.googleapis.com/userinfo/v2/me")
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    raw, err := ioutil.ReadAll(resp.Body)
    defer resp.Body.Close()
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    var profile map[string]interface{}
    if err := json.Unmarshal(raw, &profile); err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }

    session, _ := util.GlobalSessions.SessionStart(w, r)
    defer session.SessionRelease(w)

    session.Set("id_token", token.Extra("id_token"))
    session.Set("access_token", token.AccessToken)
    session.Set("profile", profile)

    http.Redirect(w, r, "/user", http.StatusMovedPermanently)
}

go - oauth2 无法获取令牌：错误请求

go - oauth2 cannot fetch token: bad request

oauth

request

token

go

google-oauth