refactor: 重构代码架构，解耦处理器和服务 (#13)
重大架构改进： - 移除全局变量 xiaohongshuService，改用依赖注入 - 将代码按职责分离到不同文件： * app_server.go - 核心服务器结构 * types.go - 统一类型定义 * routes.go - 路由配置 * middleware.go - 中间件 * handlers_api.go - REST API 处理器 * handlers_mcp.go - MCP 协议处理器 - 将通用工具函数从 AppServer 方法改为独立函数 - 删除未使用的类型定义（LoginWaitRequest） - 修复 JSON 编码错误处理 优势： ✅ 更好的依赖注入模式 ✅ 清晰的职责分离 ✅ 提高代码可测试性 ✅ 符合 Go 最佳实践 ✅ 降低耦合度，提高内聚性 🤖 Generated with [Claude Code](https://claude.ai/code) Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
zy
328
mcp_server.go
328
mcp_server.go
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package main
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"github.com/sirupsen/logrus"
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)
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// JSON-RPC 结构定义
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type JSONRPCRequest struct {
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JSONRPC string `json:"jsonrpc"`
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Method string `json:"method"`
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Params interface{} `json:"params,omitempty"`
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ID interface{} `json:"id"`
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}
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type JSONRPCResponse struct {
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JSONRPC string `json:"jsonrpc"`
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Result interface{} `json:"result,omitempty"`
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Error *JSONRPCError `json:"error,omitempty"`
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ID interface{} `json:"id"`
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}
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type JSONRPCError struct {
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Code int `json:"code"`
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Message string `json:"message"`
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Data interface{} `json:"data,omitempty"`
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}
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type MCPToolCall struct {
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Name string `json:"name"`
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Arguments map[string]interface{} `json:"arguments"`
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}
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type MCPToolResult struct {
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Content []MCPContent `json:"content"`
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IsError bool `json:"isError,omitempty"`
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}
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type MCPContent struct {
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Type string `json:"type"`
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Text string `json:"text"`
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}
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// MCP 工具处理函数
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// handleCheckLoginStatus 处理检查登录状态
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func handleCheckLoginStatus(ctx context.Context) *MCPToolResult {
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logrus.Info("MCP: 检查登录状态")
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status, err := xiaohongshuService.CheckLoginStatus(ctx)
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if err != nil {
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: "检查登录状态失败: " + err.Error(),
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}},
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IsError: true,
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}
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}
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resultText := fmt.Sprintf("登录状态检查成功: %+v", status)
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: resultText,
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}},
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}
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}
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// handlePublishContent 处理发布内容
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func handlePublishContent(ctx context.Context, args map[string]interface{}) *MCPToolResult {
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logrus.Info("MCP: 发布内容")
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// 解析参数
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title, _ := args["title"].(string)
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content, _ := args["content"].(string)
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imagePathsInterface, _ := args["images"].([]interface{})
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var imagePaths []string
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for _, path := range imagePathsInterface {
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if pathStr, ok := path.(string); ok {
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imagePaths = append(imagePaths, pathStr)
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}
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}
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logrus.Infof("MCP: 发布内容 - 标题: %s, 图片数量: %d", title, len(imagePaths))
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// 构建发布请求
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req := &PublishRequest{
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Title: title,
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Content: content,
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Images: imagePaths,
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}
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// 执行发布
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result, err := xiaohongshuService.PublishContent(ctx, req)
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if err != nil {
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: "发布失败: " + err.Error(),
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}},
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IsError: true,
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}
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}
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resultText := fmt.Sprintf("内容发布成功: %+v", result)
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: resultText,
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}},
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}
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}
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// handleListFeeds 处理获取Feeds列表
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func handleListFeeds(ctx context.Context) *MCPToolResult {
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logrus.Info("MCP: 获取Feeds列表")
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result, err := xiaohongshuService.ListFeeds(ctx)
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if err != nil {
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: "获取Feeds列表失败: " + err.Error(),
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}},
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IsError: true,
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}
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}
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// 格式化输出，转换为JSON字符串
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jsonData, err := json.MarshalIndent(result, "", " ")
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if err != nil {
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: fmt.Sprintf("获取Feeds列表成功，但序列化失败: %v", err),
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}},
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IsError: true,
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}
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}
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return &MCPToolResult{
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Content: []MCPContent{{
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Type: "text",
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Text: string(jsonData),
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}},
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}
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}
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// handleMCPRequest 处理 MCP 请求
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func handleMCPRequest(w http.ResponseWriter, r *http.Request) {
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var req JSONRPCRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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logrus.Errorf("解析请求失败: %v", err)
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sendJSONRPCError(w, req.ID, -32700, "Parse error", nil)
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return
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}
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logrus.Infof("收到MCP请求: %s", req.Method)
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switch req.Method {
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case "initialize":
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handleInitialize(w, req)
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case "tools/list":
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handleToolsList(w, req)
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case "tools/call":
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handleToolsCall(w, r, req)
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default:
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logrus.Warnf("不支持的方法: %s", req.Method)
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sendJSONRPCError(w, req.ID, -32601, "Method not found", nil)
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}
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}
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// handleInitialize 处理初始化请求
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func handleInitialize(w http.ResponseWriter, req JSONRPCRequest) {
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result := map[string]interface{}{
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"protocolVersion": "2024-11-05",
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"capabilities": map[string]interface{}{
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"tools": map[string]interface{}{},
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},
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"serverInfo": map[string]interface{}{
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"name": "xiaohongshu-mcp",
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"version": "v1.0.0",
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},
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}
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sendJSONRPCResponse(w, req.ID, result)
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}
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// handleToolsList 处理工具列表请求
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func handleToolsList(w http.ResponseWriter, req JSONRPCRequest) {
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tools := []map[string]interface{}{
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{
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"name": "check_login_status",
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"description": "检查小红书登录状态",
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"inputSchema": map[string]interface{}{
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"type": "object",
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"properties": map[string]interface{}{},
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},
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},
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{
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"name": "publish_content",
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"description": "发布内容到小红书",
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"inputSchema": map[string]interface{}{
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"type": "object",
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"properties": map[string]interface{}{
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"title": map[string]interface{}{
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"type": "string",
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"description": "发布内容的标题",
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},
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"content": map[string]interface{}{
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"type": "string",
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"description": "发布内容的正文",
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},
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"images": map[string]interface{}{
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"type": "array",
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"items": map[string]string{"type": "string"},
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"description": "图片路径或URL列表（支持本地文件路径和HTTP/HTTPS图片URL，至少一个）",
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"minItems": 1,
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},
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},
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"required": []string{"title", "content", "images"},
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},
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},
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{
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"name": "list_feeds",
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"description": "获取小红书首页Feeds列表",
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"inputSchema": map[string]interface{}{
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"type": "object",
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"properties": map[string]interface{}{},
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},
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},
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}
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result := map[string]interface{}{
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"tools": tools,
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}
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sendJSONRPCResponse(w, req.ID, result)
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}
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// handleToolsCall 处理工具调用请求
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func handleToolsCall(w http.ResponseWriter, r *http.Request, req JSONRPCRequest) {
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var toolCall MCPToolCall
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paramsBytes, _ := json.Marshal(req.Params)
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if err := json.Unmarshal(paramsBytes, &toolCall); err != nil {
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logrus.Errorf("解析工具调用参数失败: %v", err)
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sendJSONRPCError(w, req.ID, -32602, "Invalid params", nil)
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return
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}
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ctx := r.Context()
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var result *MCPToolResult
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switch toolCall.Name {
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case "check_login_status":
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result = handleCheckLoginStatus(ctx)
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case "publish_content":
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result = handlePublishContent(ctx, toolCall.Arguments)
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case "list_feeds":
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result = handleListFeeds(ctx)
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default:
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logrus.Warnf("不支持的工具: %s", toolCall.Name)
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sendJSONRPCError(w, req.ID, -32601, "Tool not found", nil)
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return
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}
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sendJSONRPCResponse(w, req.ID, result)
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}
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// sendJSONRPCResponse 发送JSON-RPC响应
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func sendJSONRPCResponse(w http.ResponseWriter, id interface{}, result interface{}) {
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response := JSONRPCResponse{
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JSONRPC: "2.0",
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Result: result,
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ID: id,
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}
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(response)
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}
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// sendJSONRPCError 发送JSON-RPC错误响应
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func sendJSONRPCError(w http.ResponseWriter, id interface{}, code int, message string, data interface{}) {
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response := JSONRPCResponse{
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JSONRPC: "2.0",
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Error: &JSONRPCError{
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Code: code,
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Message: message,
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Data: data,
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},
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ID: id,
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}
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK) // JSON-RPC错误仍然返回200状态码
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json.NewEncoder(w).Encode(response)
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}
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// createMCPHandler 创建MCP HTTP处理器
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func createMCPHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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// 设置 CORS 头
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
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w.Header().Set("Content-Type", "application/json")
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if r.Method == "OPTIONS" {
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w.WriteHeader(http.StatusOK)
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return
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}
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if r.Method != "POST" {
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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// 处理 MCP JSON-RPC 请求
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handleMCPRequest(w, r)
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}
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}
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