在Go语言中如何解决并发网络请求的请求身份认证和访问授权问题？

package main

import (
    "fmt"
    "time"
    "github.com/dgrijalva/jwt-go"
)

func main() {
    // 创建token
    token := jwt.New(jwt.SigningMethodHS256)

    // 设置Claims
    claims := make(jwt.MapClaims)
    claims["sub"] = "1234567890"
    claims["name"] = "Alice"
    claims["iat"] = time.Now().Unix()
    claims["exp"] = time.Now().Add(time.Minute * 5).Unix()

    token.Claims = claims

    // 签名
    tokenString, err := token.SignedString([]byte("secret"))
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    fmt.Println("Token:", tokenString)

    // 解析token
    parsedToken, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
        return []byte("secret"), nil
    })

    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    if claims, ok := parsedToken.Claims.(jwt.MapClaims); ok && parsedToken.Valid {
        fmt.Println("Subject:", claims["sub"])
        fmt.Println("Name:", claims["name"])
        fmt.Println("Issued At:", claims["iat"])
        fmt.Println("Expiration Time:", claims["exp"])
    } else {
        fmt.Println("Invalid token")
    }
}

package main

import (
    "context"
    "fmt"
    "golang.org/x/oauth2"
)

func main() {
    config := oauth2.Config{
        ClientID:     "your-client-id",
        ClientSecret: "your-client-secret",
        RedirectURL:  "https://your-redirect-url",
        Scopes:       []string{"scope1", "scope2"},
        Endpoint: oauth2.Endpoint{
            AuthURL:  "Https://auth-url",
            TokenURL: "https://token-url",
        },
    }

    // 生成认证链接
    authURL := config.AuthCodeURL("state", oauth2.AccessTypeOffline)
    fmt.Println("Auth URL:", authURL)

    // 获取token
    var code string
    fmt.Println("Enter the authorization code:")
    fmt.Scan(&code)

    token, err := config.Exchange(context.Background(), code)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    fmt.Println("Access Token:", token.AccessToken)
    fmt.Println("Refresh Token:", token.RefreshToken)
    fmt.Println("Expires In:", token.Expiry)
}