golang oauth2.0

以下是使用Golang进行OAuth 2.0的简要介绍：

1. 引入相关包：

import (
    "golang.org/x/oauth2"
    "golang.org/x/oauth2/google"
)

2. 配置OAuth2.0客户端：

func main() {
    conf := &oauth2.Config{
        ClientID:     "your-client-id",
        ClientSecret: "your-client-secret",
        RedirectURL:  "http://localhost:8080/callback",
        Scopes:       []string{"scope1", "scope2"},
        Endpoint:     google.Endpoint,
    }
    // ...
}

3. 获取授权链接：

func main() {
    url := conf.AuthCodeURL("state", oauth2.AccessTypeOffline)
    // Redirect user to url
}

4. 交换授权码获取访问令牌：

func handleCallback(w http.ResponseWriter, r *http.Request) {
    code := r.FormValue("code")
    token, err := conf.Exchange(oauth2.NoContext, code)
    if err != nil {
        http.Error(w, "Failed to exchange token", http.StatusInternalServerError)
        return
    }
    // Use token
}