实战指南：Go语言中的OAuth2认证

package main
 
import (
    "context"
    "fmt"
    "golang.org/x/oauth2"
    "golang.org/x/oauth2/google"
    "google.golang.org/api/people/v1"
    "log"
)
 
func main() {
    ctx := context.Background()
    client, err := google.DefaultClient(ctx, people.UserinfoEmailScope)
    if err != nil {
        log.Fatalf("Failed to get Google Client: %v", err)
    }
 
    // 创建一个人员服务客户端
    service, err := people.NewService(ctx, option.WithHTTPClient(client))
    if err != nil {
        log.Fatalf("Failed to create People service client: %v", err)
    }
 
    // 获取用户的人员信息
    person, err := service.People.Get("people/me").PersonFields("names", "emailAddresses").Do()
    if err != nil {
        log.Fatalf("Failed to get current user's information: %v", err)
    }
 
    fmt.Printf("Logged in as %s\n", person.DisplayName)
}

这段代码首先设置了OAuth 2.0的认证流程，然后创建了一个与Google People API交互的客户端，并获取了当前登录用户的信息。这个过程展示了如何使用Go语言与Google的API进行交互，并且如何处理OAuth 2.0授权。