Files
sub2api/backend/internal/repository/gemini_oauth_client.go
ianshaw 632318ad33 feat(backend): 添加 OAuth 能力查询接口,改进 OAuth 客户端选择逻辑
Handler 改进:
- 添加 GET /api/v1/admin/gemini/oauth/capabilities 接口
- 简化 GenerateAuthURL,redirect_uri 由服务层决定

Repository 改进:
- ExchangeCode/RefreshToken 根据 oauthType 选择正确的 OAuth 客户端
- Code Assist 始终使用内置客户端,AI Studio 使用用户配置的客户端
2025-12-26 00:11:03 -08:00

118 lines
3.3 KiB
Go

package repository
import (
"context"
"fmt"
"net/url"
"time"
"github.com/Wei-Shaw/sub2api/internal/config"
"github.com/Wei-Shaw/sub2api/internal/pkg/geminicli"
"github.com/Wei-Shaw/sub2api/internal/service"
"github.com/imroc/req/v3"
)
type geminiOAuthClient struct {
tokenURL string
cfg *config.Config
}
func NewGeminiOAuthClient(cfg *config.Config) service.GeminiOAuthClient {
return &geminiOAuthClient{
tokenURL: geminicli.TokenURL,
cfg: cfg,
}
}
func (c *geminiOAuthClient) ExchangeCode(ctx context.Context, oauthType, code, codeVerifier, redirectURI, proxyURL string) (*geminicli.TokenResponse, error) {
client := createGeminiReqClient(proxyURL)
// Use different OAuth clients based on oauthType:
// - code_assist: always use built-in Gemini CLI OAuth client (public)
// - ai_studio: requires a user-provided OAuth client
oauthCfgInput := geminicli.OAuthConfig{
ClientID: c.cfg.Gemini.OAuth.ClientID,
ClientSecret: c.cfg.Gemini.OAuth.ClientSecret,
Scopes: c.cfg.Gemini.OAuth.Scopes,
}
if oauthType == "code_assist" {
oauthCfgInput.ClientID = ""
oauthCfgInput.ClientSecret = ""
}
oauthCfg, err := geminicli.EffectiveOAuthConfig(oauthCfgInput, oauthType)
if err != nil {
return nil, err
}
formData := url.Values{}
formData.Set("grant_type", "authorization_code")
formData.Set("client_id", oauthCfg.ClientID)
formData.Set("client_secret", oauthCfg.ClientSecret)
formData.Set("code", code)
formData.Set("code_verifier", codeVerifier)
formData.Set("redirect_uri", redirectURI)
var tokenResp geminicli.TokenResponse
resp, err := client.R().
SetContext(ctx).
SetFormDataFromValues(formData).
SetSuccessResult(&tokenResp).
Post(c.tokenURL)
if err != nil {
return nil, fmt.Errorf("request failed: %w", err)
}
if !resp.IsSuccessState() {
return nil, fmt.Errorf("token exchange failed: status %d, body: %s", resp.StatusCode, geminicli.SanitizeBodyForLogs(resp.String()))
}
return &tokenResp, nil
}
func (c *geminiOAuthClient) RefreshToken(ctx context.Context, oauthType, refreshToken, proxyURL string) (*geminicli.TokenResponse, error) {
client := createGeminiReqClient(proxyURL)
oauthCfgInput := geminicli.OAuthConfig{
ClientID: c.cfg.Gemini.OAuth.ClientID,
ClientSecret: c.cfg.Gemini.OAuth.ClientSecret,
Scopes: c.cfg.Gemini.OAuth.Scopes,
}
if oauthType == "code_assist" {
oauthCfgInput.ClientID = ""
oauthCfgInput.ClientSecret = ""
}
oauthCfg, err := geminicli.EffectiveOAuthConfig(oauthCfgInput, oauthType)
if err != nil {
return nil, err
}
formData := url.Values{}
formData.Set("grant_type", "refresh_token")
formData.Set("refresh_token", refreshToken)
formData.Set("client_id", oauthCfg.ClientID)
formData.Set("client_secret", oauthCfg.ClientSecret)
var tokenResp geminicli.TokenResponse
resp, err := client.R().
SetContext(ctx).
SetFormDataFromValues(formData).
SetSuccessResult(&tokenResp).
Post(c.tokenURL)
if err != nil {
return nil, fmt.Errorf("request failed: %w", err)
}
if !resp.IsSuccessState() {
return nil, fmt.Errorf("token refresh failed: status %d, body: %s", resp.StatusCode, geminicli.SanitizeBodyForLogs(resp.String()))
}
return &tokenResp, nil
}
func createGeminiReqClient(proxyURL string) *req.Client {
client := req.C().SetTimeout(60 * time.Second)
if proxyURL != "" {
client.SetProxyURL(proxyURL)
}
return client
}