diff --git a/internal/provider/providers/casdoor.go b/internal/provider/providers/casdoor.go
new file mode 100644
index 0000000..56d9396
--- /dev/null
+++ b/internal/provider/providers/casdoor.go
@@ -0,0 +1,118 @@
+package providers
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"github.com/synctv-org/synctv/internal/provider"
+	"github.com/synctv-org/synctv/internal/settings"
+	"golang.org/x/oauth2"
+)
+
+// https://door.casdoor.com/.well-known/openid-configuration
+type casdoorProvider struct {
+	config   oauth2.Config
+	endpoint string
+}
+
+func newCasdoorProvider() provider.Interface {
+	return &casdoorProvider{
+		config: oauth2.Config{
+			Scopes: []string{"profile", "email", "phone", "name", "openid"},
+		},
+	}
+}
+
+func (p *casdoorProvider) Init(opt provider.Oauth2Option) {
+	p.config.ClientID = opt.ClientID
+	p.config.ClientSecret = opt.ClientSecret
+	p.config.RedirectURL = opt.RedirectURL
+}
+
+func (p *casdoorProvider) NewAuthURL(ctx context.Context, state string) (string, error) {
+	return p.config.AuthCodeURL(state, oauth2.AccessTypeOnline), nil
+}
+
+func (p *casdoorProvider) GetToken(ctx context.Context, code string) (*oauth2.Token, error) {
+	return p.config.Exchange(ctx, code)
+}
+
+func (p *casdoorProvider) RefreshToken(ctx context.Context, token string) (*oauth2.Token, error) {
+	return p.config.TokenSource(ctx, &oauth2.Token{RefreshToken: token}).Token()
+}
+
+func (p *casdoorProvider) GetUserInfo(ctx context.Context, code string) (*provider.UserInfo, error) {
+	tk, err := p.GetToken(ctx, code)
+	if err != nil {
+		return nil, err
+	}
+	client := p.config.Client(ctx, tk)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, p.endpoint+"/api/userinfo", nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	var ui casdoorUserInfo
+	err = json.NewDecoder(resp.Body).Decode(&ui)
+	if err != nil {
+		return nil, err
+	}
+	un := ui.PreferredUsername
+	if un == "" {
+		un = ui.Name
+	}
+	return &provider.UserInfo{
+		ProviderUserID: ui.Sub,
+		Username:       un,
+	}, nil
+}
+
+type casdoorUserInfo struct {
+	Sub               string `json:"sub"`
+	PreferredUsername string `json:"preferred_username"`
+	Name              string `json:"name"`
+	Email             string `json:"email"`
+	Phone             string `json:"phone"`
+}
+
+func (p *casdoorProvider) RegistSetting(group string) {
+	settings.NewStringSetting(
+		group+"_endpoint", "", group,
+		settings.WithAfterInitString(func(ss settings.StringSetting, s string) {
+			p.endpoint = s
+			p.config.Endpoint = oauth2.Endpoint{
+				AuthURL:  s + "/login/oauth/authorize",
+				TokenURL: s + "/api/login/oauth/access_token",
+			}
+		}),
+		settings.WithBeforeSetString(func(ss settings.StringSetting, s string) (string, error) {
+			u, err := url.Parse(s)
+			if err != nil {
+				return "", err
+			}
+			return fmt.Sprintf("%s://%s", u.Scheme, u.Host), nil
+		}),
+		settings.WithAfterSetString(func(ss settings.StringSetting, s string) {
+			p.endpoint = s
+			p.config.Endpoint = oauth2.Endpoint{
+				AuthURL:  s + "/login/oauth/authorize",
+				TokenURL: s + "/api/login/oauth/access_token",
+			}
+		}),
+	)
+}
+
+func (p *casdoorProvider) Provider() provider.OAuth2Provider {
+	return "casdoor"
+}
+
+func init() {
+	RegisterProvider(newCasdoorProvider())
+}
diff --git a/internal/provider/providers/logto.go b/internal/provider/providers/logto.go
index 04d2801..e74230b 100644
--- a/internal/provider/providers/logto.go
+++ b/internal/provider/providers/logto.go
@@ -3,8 +3,9 @@ package providers
 import (
 	"context"
 	"encoding/json"
+	"fmt"
 	"net/http"
-	"strings"
+	"net/url"
 
 	"github.com/synctv-org/synctv/internal/provider"
 	"github.com/synctv-org/synctv/internal/settings"
@@ -86,17 +87,20 @@ func (p *logtoProvider) RegistSetting(group string) {
 	settings.NewStringSetting(
 		group+"_endpoint", "", group,
 		settings.WithAfterInitString(func(ss settings.StringSetting, s string) {
-			s = strings.TrimSuffix(s, "/")
-			s = strings.TrimSuffix(s, "/oidc")
 			p.endpoint = s
 			p.config.Endpoint = oauth2.Endpoint{
 				AuthURL:  s + "/oidc/auth",
 				TokenURL: s + "/oidc/token",
 			}
 		}),
+		settings.WithBeforeSetString(func(ss settings.StringSetting, s string) (string, error) {
+			u, err := url.Parse(s)
+			if err != nil {
+				return "", err
+			}
+			return fmt.Sprintf("%s://%s", u.Scheme, u.Host), nil
+		}),
 		settings.WithAfterSetString(func(ss settings.StringSetting, s string) {
-			s = strings.TrimSuffix(s, "/")
-			s = strings.TrimSuffix(s, "/oidc")
 			p.endpoint = s
 			p.config.Endpoint = oauth2.Endpoint{
 				AuthURL:  s + "/oidc/auth",