feat: oauth2

examples/oauth/oauth2_test_client.go

@@ -0,0 +1,181 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"net/url"
+	"path"
+	"strings"
+	"time"
+
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/clientcredentials"
+)
+
+func main() {
+	// 测试 Client Credentials 流程
+	//testClientCredentials()
+
+	// 测试 Authorization Code + PKCE 流程（需要浏览器交互）
+	testAuthorizationCode()
+}
+
+// testClientCredentials 测试服务对服务认证
+func testClientCredentials() {
+	fmt.Println("=== Testing Client Credentials Flow ===")
+
+	cfg := clientcredentials.Config{
+		ClientID:     "client_dsFyyoyNZWjhbNa2", // 需要先创建客户端
+		ClientSecret: "hLLdn2Ia4UM7hcsJaSuUFDV0Px9BrkNq",
+		TokenURL:     "http://localhost:3000/api/oauth/token",
+		Scopes:       []string{"api:read", "api:write"},
+		EndpointParams: map[string][]string{
+			"audience": {"api://new-api"},
+		},
+	}
+
+	// 创建HTTP客户端
+	httpClient := cfg.Client(context.Background())
+
+	// 调用受保护的API
+	resp, err := httpClient.Get("http://localhost:3000/api/status")
+	if err != nil {
+		log.Printf("Request failed: %v", err)
+		return
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		log.Printf("Failed to read response: %v", err)
+		return
+	}
+
+	fmt.Printf("Status: %s\n", resp.Status)
+	fmt.Printf("Response: %s\n", string(body))
+}
+
+// testAuthorizationCode 测试授权码流程
+func testAuthorizationCode() {
+	fmt.Println("=== Testing Authorization Code + PKCE Flow ===")
+
+	conf := oauth2.Config{
+		ClientID:     "client_dsFyyoyNZWjhbNa2", // 需要先创建客户端
+		ClientSecret: "JHiugKf89OMmTLuZMZyA2sgZnO0Ioae3",
+		RedirectURL:  "http://localhost:9999/callback",
+		// 包含 openid/profile/email 以便调用 UserInfo
+		Scopes: []string{"openid", "profile", "email", "api:read"},
+		Endpoint: oauth2.Endpoint{
+			AuthURL:  "http://localhost:3000/api/oauth/authorize",
+			TokenURL: "http://localhost:3000/api/oauth/token",
+		},
+	}
+
+	// 生成PKCE参数
+	codeVerifier := oauth2.GenerateVerifier()
+	state := fmt.Sprintf("state-%d", time.Now().Unix())
+
+	// 构建授权URL
+	url := conf.AuthCodeURL(
+		state,
+		oauth2.S256ChallengeOption(codeVerifier),
+		//oauth2.SetAuthURLParam("audience", "api://new-api"),
+	)
+
+	fmt.Printf("Visit this URL to authorize:\n%s\n\n", url)
+	fmt.Printf("A local server will listen on http://localhost:9999/callback to receive the code...\n")
+
+	// 启动回调本地服务器，自动接收授权码
+	codeCh := make(chan string, 1)
+	srv := &http.Server{Addr: ":9999"}
+	http.HandleFunc("/callback", func(w http.ResponseWriter, r *http.Request) {
+		q := r.URL.Query()
+		if errParam := q.Get("error"); errParam != "" {
+			fmt.Fprintf(w, "Authorization failed: %s", errParam)
+			return
+		}
+		gotState := q.Get("state")
+		if gotState != state {
+			http.Error(w, "state mismatch", http.StatusBadRequest)
+			return
+		}
+		code := q.Get("code")
+		if code == "" {
+			http.Error(w, "missing code", http.StatusBadRequest)
+			return
+		}
+		fmt.Fprintln(w, "Authorization received. You may close this window.")
+		select {
+		case codeCh <- code:
+		default:
+		}
+		go func() {
+			// 稍后关闭服务
+			_ = srv.Shutdown(context.Background())
+		}()
+	})
+	go func() {
+		_ = srv.ListenAndServe()
+	}()
+
+	// 等待授权码
+	var code string
+	select {
+	case code = <-codeCh:
+	case <-time.After(5 * time.Minute):
+		log.Println("Timeout waiting for authorization code")
+		_ = srv.Shutdown(context.Background())
+		return
+	}
+
+	// 交换令牌
+	token, err := conf.Exchange(
+		context.Background(),
+		code,
+		oauth2.VerifierOption(codeVerifier),
+	)
+	if err != nil {
+		log.Printf("Token exchange failed: %v", err)
+		return
+	}
+
+	fmt.Printf("Access Token: %s\n", token.AccessToken)
+	fmt.Printf("Token Type: %s\n", token.TokenType)
+	fmt.Printf("Expires In: %v\n", token.Expiry)
+
+	// 使用令牌调用 UserInfo
+	client := conf.Client(context.Background(), token)
+	userInfoURL := buildUserInfoFromAuth(conf.Endpoint.AuthURL)
+	resp, err := client.Get(userInfoURL)
+	if err != nil {
+		log.Printf("UserInfo request failed: %v", err)
+		return
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		log.Printf("Failed to read UserInfo response: %v", err)
+		return
+	}
+	fmt.Printf("UserInfo: %s\n", string(body))
+}
+
+// buildUserInfoFromAuth 将授权端点URL转换为UserInfo端点URL
+func buildUserInfoFromAuth(auth string) string {
+	u, err := url.Parse(auth)
+	if err != nil {
+		return ""
+	}
+	// 将最后一个路径段 authorize 替换为 userinfo
+	dir := path.Dir(u.Path)
+	if strings.HasSuffix(u.Path, "/authorize") {
+		u.Path = path.Join(dir, "userinfo")
+	} else {
+		// 回退：追加默认 /oauth/userinfo
+		u.Path = path.Join(dir, "userinfo")
+	}
+	return u.String()
+}