去 - 的oauth2無法獲取令牌：壞請求

Question

我寫的回調處理程序與谷歌帳戶登錄：

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，我所服務的處理

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)), 
)) 

我遇到我得到了同樣的問題我的老問題： oauth2 cannot fetch token: bad request

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

在我上次問這個問題後，我設法用上面的代碼修復了它，成功地訪問並獲取了數據，但是昨晚它突然再次出現這個錯誤，我不明白爲什麼在最近幾天工作後它不再工作使用完全相同的代碼

如何從AuthCodeURL獲得code？有沒有辦法讓代碼交換而不重定向到任何其他處理程序？我想要處理，在短短一個此處理所有的事情

Answer 1

我可以再增加一個處理器

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) 
}