添加新登录插件：飞书SSO (#33)

* Add new login provider "feishu_sso"

* Add FeishuSSO plugin

* 添加新登录插件：飞书SSO

* 添加新登录插件：飞书SSO(增加通过args读取ssoid)

* 添加注释：FeishuSSO Plugin

* 添加注释：FeishuSSO Plugin

internal/provider/plugins/example/example_feishuSSO/example_feishuSSO.go

@@ -0,0 +1,106 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	plugin "github.com/hashicorp/go-plugin"
+	"github.com/synctv-org/synctv/internal/provider"
+	"github.com/synctv-org/synctv/internal/provider/plugins"
+	"golang.org/x/oauth2"
+	"net/http"
+	"os"
+)
+
+// Mac/Linux:
+// go build -o feishuSSO ./internal/provider/plugins/example/example_feishuSSO/example_feishuSSO.go
+//
+// Windows:
+// go build -o feishuSSO.exe ./internal/provider/plugins/example/example_feishuSSO/example_feishuSSO.go
+//
+// mv gitee {data-dir}/plugins/oauth2/feishuSSO
+//
+// 飞书SSO登录插件设置信息：飞书集成平台-身份集成-应用单点登录-你创建的SSO服务
+//
+// config.yaml:
+//
+//	oauth2:
+//		providers:
+//			feishuSSO:
+//				client_id: "App ID"
+//				client_secret: "App Secret"
+//				redirect_url: "登录回调地址"
+//		plugins:
+//			- plugin_file: plugins/oauth2/feishuSSO
+//			  arges:
+//				- "OAuth2.0协议端点中的一串数字"
+type FeishuProvider struct {
+	config oauth2.Config
+	ssoid  string // Your SSO Application ID in Feishu Anycross
+}
+
+func (p *FeishuProvider) Init(c provider.Oauth2Option) {
+	p.config.Scopes = []string{"profile"}
+	p.config.Endpoint = oauth2.Endpoint{
+		AuthURL:  fmt.Sprintf("https://anycross.feishu.cn/sso/%s/oauth2/auth", p.ssoid),  // 认证端点
+		TokenURL: fmt.Sprintf("https://anycross.feishu.cn/sso/%s/oauth2/token", p.ssoid), //Token 端点
+	}
+	p.config.ClientID = c.ClientID
+	p.config.ClientSecret = c.ClientSecret
+	p.config.RedirectURL = c.RedirectURL
+}
+
+func (p *FeishuProvider) Provider() provider.OAuth2Provider {
+	return "feishuSSO" //插件名
+}
+
+func (p *FeishuProvider) NewAuthURL(state string) string {
+	return p.config.AuthCodeURL(state, oauth2.AccessTypeOnline)
+}
+
+func (p *FeishuProvider) GetToken(ctx context.Context, code string) (*oauth2.Token, error) {
+	return p.config.Exchange(ctx, code)
+}
+
+func (p *FeishuProvider) RefreshToken(ctx context.Context, tk string) (*oauth2.Token, error) {
+	return p.config.TokenSource(ctx, &oauth2.Token{RefreshToken: tk}).Token()
+}
+
+func (p *FeishuProvider) GetUserInfo(ctx context.Context, tk *oauth2.Token) (*provider.UserInfo, error) {
+	client := p.config.Client(ctx, tk)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("https://anycross.feishu.cn/sso/%s/oauth2/userinfo", p.ssoid), nil) // 身份端点
+	if err != nil {
+		return nil, err
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	ui := feishuUserInfo{}
+	err = json.NewDecoder(resp.Body).Decode(&ui)
+	if err != nil {
+		return nil, err
+	}
+	return &provider.UserInfo{
+		Username:       ui.Name,
+		ProviderUserID: ui.UserID,
+	}, nil
+}
+
+type feishuUserInfo struct {
+	UserID string `json:"user_id"` // 飞书UserID （企业内唯一ID）
+	Name   string `json:"name"`    // 飞书姓名（会作为SyncTV登录用户名）
+}
+
+func main() {
+	args := os.Args
+	var pluginMap = map[string]plugin.Plugin{
+		"Provider": &plugins.ProviderPlugin{Impl: &FeishuProvider{ssoid: args[1]}},
+	}
+	plugin.Serve(&plugin.ServeConfig{
+		HandshakeConfig: plugins.HandshakeConfig,
+		Plugins:         pluginMap,
+		GRPCServer:      plugin.DefaultGRPCServer,
+	})
+}