feat: 原生集成 MCP Server (POST /mcp, JSON-RPC 2.0, Bearer Token)
- Streamable HTTP 传输，支持 initialize/ping/tools/list/tools/call 及批量调用 - 6 个工具: add_service(自动抓 title/description/favicon)、create_category、 list_categories(含服务计数)、list_services(keyword/category/tag 过滤)、 update_service、delete_service - 鉴权: TONAV_MCP_TOKEN 环境变量 (systemd 注入)
This commit is contained in:
+665
@@ -0,0 +1,665 @@
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package handlers
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import (
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"os"
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"strconv"
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"strings"
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"time"
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"tonav-go/database"
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"tonav-go/models"
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"github.com/gin-gonic/gin"
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)
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// ============ MCP (Model Context Protocol) v1 ============
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// 传输: Streamable HTTP (POST /mcp, JSON-RPC 2.0)
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// 鉴权: Authorization: Bearer <TONAV_MCP_TOKEN>
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type mcpConfig struct {
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Token string
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}
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var mcpToken string
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// LoadMCPConfig 读取 MCP 配置（环境变量 TONAV_MCP_TOKEN）
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func LoadMCPConfig() {
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mcpToken = os.Getenv("TONAV_MCP_TOKEN")
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if mcpToken == "" {
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mcpToken = "tonav-mcp-default-token"
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}
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}
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// MCPAuthRequired MCP Bearer Token 鉴权
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func MCPAuthRequired() gin.HandlerFunc {
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return func(c *gin.Context) {
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auth := c.GetHeader("Authorization")
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token := strings.TrimPrefix(auth, "Bearer ")
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if token == "" || token != mcpToken {
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c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
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"jsonrpc": "2.0",
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"error": gin.H{
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"code": -32001,
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"message": "unauthorized: invalid or missing bearer token",
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},
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"id": nil,
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})
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return
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}
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c.Next()
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}
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}
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// ============ JSON-RPC 结构 ============
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type jsonRPCRequest struct {
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JSONRPC string `json:"jsonrpc"`
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ID json.RawMessage `json:"id,omitempty"`
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Method string `json:"method"`
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Params json.RawMessage `json:"params,omitempty"`
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}
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type jsonRPCResponse struct {
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JSONRPC string `json:"jsonrpc"`
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ID interface{} `json:"id"`
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Result interface{} `json:"result,omitempty"`
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Error *jsonRPCError `json:"error,omitempty"`
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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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// ============ MCP 工具定义 ============
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type mcpTool struct {
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Name string `json:"name"`
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Description string `json:"description"`
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InputSchema map[string]interface{} `json:"inputSchema"`
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}
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func mcpToolDefs() []mcpTool {
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return []mcpTool{
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{
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Name: "tonav_add_service",
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Description: "向 ToNav 导航页添加一个服务网址。可指定名称、分类（不存在则自动创建）、标签、描述、是否开启健康检查。不传 name 时会尝试抓取目标网页的 <title> 自动命名。",
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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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"url": map[string]interface{}{"type": "string", "description": "服务网址，必填"},
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"name": map[string]interface{}{"type": "string", "description": "服务名称，不填自动抓取网页 title"},
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"category": map[string]interface{}{"type": "string", "description": "分类名称，不存在时自动创建"},
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"tags": map[string]interface{}{"type": "array", "items": map[string]interface{}{"type": "string"}, "description": "标签列表，如 [\"监控\",\"告警\"]"},
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"description": map[string]interface{}{"type": "string", "description": "服务描述，不填自动抓取网页 meta description"},
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"icon": map[string]interface{}{"type": "string", "description": "图标 URL，不填自动使用 /favicon.ico"},
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"health_check_enabled": map[string]interface{}{"type": "boolean", "description": "是否开启健康检查，默认 true"},
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"health_check_url": map[string]interface{}{"type": "string", "description": "健康检查地址，默认同 url"},
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"is_enabled": map[string]interface{}{"type": "boolean", "description": "是否启用显示，默认 true"},
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},
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"required": []string{"url"},
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},
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},
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{
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Name: "tonav_create_category",
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Description: "在 ToNav 中创建一个分类",
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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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"name": map[string]interface{}{"type": "string", "description": "分类名称，必填"},
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"sort_order": map[string]interface{}{"type": "integer", "description": "排序权重，数字越大越靠前，默认 0"},
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},
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"required": []string{"name"},
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},
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},
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{
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Name: "tonav_list_categories",
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Description: "列出 ToNav 所有分类（含每个分类下的服务数量）",
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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: "tonav_list_services",
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Description: "列出 ToNav 服务，可按关键词/分类名/标签过滤",
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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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"keyword": map[string]interface{}{"type": "string", "description": "按名称/URL/描述模糊匹配"},
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"category": map[string]interface{}{"type": "string", "description": "按分类名过滤"},
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"tag": map[string]interface{}{"type": "string", "description": "按标签过滤"},
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},
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},
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},
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{
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Name: "tonav_update_service",
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Description: "按名称或 ID 更新已有服务：可改名称/URL/分类/标签/描述/启用状态/健康检查开关",
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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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"id": map[string]interface{}{"type": "integer", "description": "服务 ID（与 name 二选一）"},
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"name": map[string]interface{}{"type": "string", "description": "现有服务名称（用于定位服务）"},
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"new_name": map[string]interface{}{"type": "string", "description": "新名称"},
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"url": map[string]interface{}{"type": "string", "description": "新 URL"},
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"category": map[string]interface{}{"type": "string", "description": "新分类名（不存在自动创建）"},
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"tags": map[string]interface{}{"type": "array", "items": map[string]interface{}{"type": "string"}, "description": "新标签列表（整体替换）"},
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"description": map[string]interface{}{"type": "string", "description": "新描述"},
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"is_enabled": map[string]interface{}{"type": "boolean"},
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"health_check_enabled": map[string]interface{}{"type": "boolean"},
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"health_check_url": map[string]interface{}{"type": "string"},
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},
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},
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},
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{
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Name: "tonav_delete_service",
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Description: "按名称或 ID 删除一个服务",
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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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"id": map[string]interface{}{"type": "integer", "description": "服务 ID（与 name 二选一）"},
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"name": map[string]interface{}{"type": "string", "description": "服务名称"},
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},
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},
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},
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}
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}
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// ============ 工具实现 ============
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// fetchPageMeta 抓取网页 <title> 与 meta description
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func fetchPageMeta(rawURL string) (title, desc string) {
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client := &http.Client{Timeout: 6 * time.Second}
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if !strings.HasPrefix(rawURL, "http") {
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rawURL = "https://" + rawURL
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}
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resp, err := client.Get(rawURL)
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if err != nil {
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return "", ""
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(io.LimitReader(resp.Body, 256*1024))
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if err != nil {
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return "", ""
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}
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html := string(body)
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// title
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if s := strings.Index(strings.ToLower(html), "<title"); s >= 0 {
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rest := html[s:]
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if e := strings.Index(strings.ToLower(rest), "</title>"); e >= 0 {
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inner := rest[len("<title"):e]
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if c := strings.Index(inner, ">"); c >= 0 {
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title = strings.TrimSpace(inner[c+1:])
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}
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}
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}
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// meta description
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lower := strings.ToLower(html)
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if idx := strings.Index(lower, "name=\"description\""); idx >= 0 {
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seg := html[idx:]
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if cIdx := strings.Index(strings.ToLower(seg), "content=\""); cIdx >= 0 {
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seg = seg[cIdx+len("content=\""):]
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if eIdx := strings.Index(seg, "\""); eIdx >= 0 {
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desc = strings.TrimSpace(seg[:eIdx])
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}
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}
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}
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if len(title) > 200 {
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title = title[:200]
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}
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if len(desc) > 500 {
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desc = desc[:500]
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}
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return title, desc
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}
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// normalizeURL 规范化 URL
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func normalizeURL(u string) string {
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u = strings.TrimSpace(u)
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if u != "" && !strings.HasPrefix(u, "http://") && !strings.HasPrefix(u, "https://") {
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u = "https://" + u
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}
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return u
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}
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// ensureCategory 获取或创建分类，返回分类 ID
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func ensureCategory(name string) (uint, error) {
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var cat models.Category
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if err := database.DB.Where("name = ?", name).First(&cat).Error; err == nil {
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return cat.ID, nil
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}
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cat = models.Category{Name: name, SortOrder: 50}
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if err := database.DB.Create(&cat).Error; err != nil {
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// 并发或重名冲突时再查一次
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if err2 := database.DB.Where("name = ?", name).First(&cat).Error; err2 == nil {
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return cat.ID, nil
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}
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return 0, err
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}
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return cat.ID, nil
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}
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// findService 按 ID 或名称定位服务
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func findService(id float64, name string) (*models.Service, error) {
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var svc models.Service
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var err error
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if id > 0 {
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err = database.DB.First(&svc, uint(id)).Error
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} else if name != "" {
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err = database.DB.Where("name = ?", name).First(&svc).Error
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} else {
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err = fmt.Errorf("必须提供 id 或 name")
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}
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if err != nil {
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return nil, err
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}
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return &svc, nil
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}
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// tagsToString 标签数组转存储格式（逗号分隔）
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func tagsToString(tags []interface{}) string {
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if len(tags) == 0 {
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return ""
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}
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parts := make([]string, 0, len(tags))
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for _, t := range tags {
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if s, ok := t.(string); ok && strings.TrimSpace(s) != "" {
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parts = append(parts, strings.TrimSpace(s))
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}
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}
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return strings.Join(parts, ",")
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}
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// toolAddService 添加服务
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func toolAddService(args map[string]interface{}) (interface{}, error) {
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rawURL, _ := args["url"].(string)
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if strings.TrimSpace(rawURL) == "" {
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return nil, fmt.Errorf("url 不能为空")
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}
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url := normalizeURL(rawURL)
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name, _ := args["name"].(string)
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description, _ := args["description"].(string)
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category, _ := args["category"].(string)
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// 自动抓取 title / description
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autoTitle, autoDesc := "", ""
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if strings.TrimSpace(name) == "" || strings.TrimSpace(description) == "" {
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autoTitle, autoDesc = fetchPageMeta(url)
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}
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if strings.TrimSpace(name) == "" {
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name = autoTitle
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}
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if strings.TrimSpace(name) == "" {
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// 兜底用 host
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u := strings.TrimPrefix(strings.TrimPrefix(url, "https://"), "http://")
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name = strings.Split(u, "/")[0]
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}
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if strings.TrimSpace(description) == "" {
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description = autoDesc
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}
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healthEnabled := true
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if v, ok := args["health_check_enabled"].(bool); ok {
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healthEnabled = v
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}
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isEnabled := true
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if v, ok := args["is_enabled"].(bool); ok {
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isEnabled = v
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}
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healthURL, _ := args["health_check_url"].(string)
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var categoryID uint
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if strings.TrimSpace(category) != "" {
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cid, err := ensureCategory(strings.TrimSpace(category))
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if err != nil {
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return nil, fmt.Errorf("创建分类失败: %v", err)
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}
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categoryID = cid
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}
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icon, _ := args["icon"].(string)
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if strings.TrimSpace(icon) == "" {
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u := strings.TrimPrefix(strings.TrimPrefix(url, "https://"), "http://")
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host := strings.Split(u, "/")[0]
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icon = "https://" + host + "/favicon.ico"
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}
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// 查重：同名或同 URL 已存在则返回提示
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var existed models.Service
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if err := database.DB.Where("url = ?", url).First(&existed).Error; err == nil {
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return map[string]interface{}{
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"created": false,
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"message": fmt.Sprintf("已存在相同 URL 的服务「%s」(id=%d)，未重复创建。可使用 tonav_update_service 更新它。", existed.Name, existed.ID),
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"existing": existed,
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}, nil
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}
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svc := models.Service{
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Name: strings.TrimSpace(name),
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URL: url,
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Description: strings.TrimSpace(description),
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Icon: icon,
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CategoryID: categoryID,
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Status: "unknown",
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Tags: tagsToString(args["tags"].([]interface{})),
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IsEnabled: isEnabled,
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HealthCheckURL: strings.TrimSpace(healthURL),
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HealthCheckEnabled: healthEnabled,
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}
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// tags 需要单独处理（args["tags"] 可能不存在）
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if rawTags, ok := args["tags"]; ok {
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if arr, ok := rawTags.([]interface{}); ok {
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svc.Tags = tagsToString(arr)
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}
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}
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if svc.Tags == "" {
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if arr, ok := args["tags"].([]interface{}); ok {
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svc.Tags = tagsToString(arr)
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}
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}
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if err := database.DB.Create(&svc).Error; err != nil {
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return nil, fmt.Errorf("创建失败: %v", err)
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}
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catName := category
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if catName == "" && categoryID > 0 {
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var cat models.Category
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if database.DB.First(&cat, categoryID).Error == nil {
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catName = cat.Name
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}
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}
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return map[string]interface{}{
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"created": true,
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"message": fmt.Sprintf("已添加服务「%s」%s", svc.Name, func() string { if catName != "" { return " 到分类「" + catName + "」" }; return "" }()),
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"service": svc,
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"category_id": categoryID,
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"category": catName,
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"tags": svc.Tags,
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}, nil
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}
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// toolCreateCategory 创建分类
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func toolCreateCategory(args map[string]interface{}) (interface{}, error) {
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name, _ := args["name"].(string)
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if strings.TrimSpace(name) == "" {
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return nil, fmt.Errorf("name 不能为空")
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}
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sortOrder := 0
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if v, ok := args["sort_order"].(float64); ok {
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sortOrder = int(v)
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}
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var existed models.Category
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if err := database.DB.Where("name = ?", name).First(&existed).Error; err == nil {
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return map[string]interface{}{
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"created": false,
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"message": fmt.Sprintf("分类「%s」已存在 (id=%d)", existed.Name, existed.ID),
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"category": existed,
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}, nil
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}
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cat := models.Category{Name: strings.TrimSpace(name), SortOrder: sortOrder}
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if err := database.DB.Create(&cat).Error; err != nil {
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return nil, fmt.Errorf("创建分类失败: %v", err)
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}
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return map[string]interface{}{
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"created": true,
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"message": fmt.Sprintf("已创建分类「%s」", cat.Name),
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"category": cat,
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}, nil
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}
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// toolListCategories 列出分类
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func toolListCategories(_ map[string]interface{}) (interface{}, error) {
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var cats []models.Category
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database.DB.Order("sort_order desc").Find(&cats)
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type catWithCount struct {
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models.Category
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ServiceCount int64 `json:"service_count"`
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}
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result := make([]catWithCount, 0, len(cats))
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for _, c := range cats {
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var cnt int64
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database.DB.Model(&models.Service{}).Where("category_id = ?", c.ID).Count(&cnt)
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result = append(result, catWithCount{Category: c, ServiceCount: cnt})
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}
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return map[string]interface{}{"categories": result}, nil
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}
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// toolListServices 列出服务
|
||||
func toolListServices(args map[string]interface{}) (interface{}, error) {
|
||||
var svcs []models.Service
|
||||
q := database.DB.Order("category_id asc, sort_order desc")
|
||||
keyword, _ := args["keyword"].(string)
|
||||
category, _ := args["category"].(string)
|
||||
tag, _ := args["tag"].(string)
|
||||
|
||||
if category != "" {
|
||||
var cat models.Category
|
||||
if err := database.DB.Where("name = ?", category).First(&cat).Error; err != nil {
|
||||
return map[string]interface{}{"services": []models.Service{}, "message": "分类不存在: " + category}, nil
|
||||
}
|
||||
q = q.Where("category_id = ?", cat.ID)
|
||||
}
|
||||
if tag != "" {
|
||||
q = q.Where("tags LIKE ?", "%"+tag+"%")
|
||||
}
|
||||
if keyword != "" {
|
||||
like := "%" + keyword + "%"
|
||||
q = q.Where("name LIKE ? OR url LIKE ? OR description LIKE ?", like, like, like)
|
||||
}
|
||||
q.Find(&svcs)
|
||||
return map[string]interface{}{"count": len(svcs), "services": svcs}, nil
|
||||
}
|
||||
|
||||
// toolUpdateService 更新服务
|
||||
func toolUpdateService(args map[string]interface{}) (interface{}, error) {
|
||||
id, _ := args["id"].(float64)
|
||||
name, _ := args["name"].(string)
|
||||
svc, err := findService(id, name)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("未找到服务: %v", err)
|
||||
}
|
||||
|
||||
changes := map[string]interface{}{}
|
||||
if v, ok := args["new_name"].(string); ok && strings.TrimSpace(v) != "" {
|
||||
changes["name"] = strings.TrimSpace(v)
|
||||
}
|
||||
if v, ok := args["url"].(string); ok && strings.TrimSpace(v) != "" {
|
||||
changes["url"] = normalizeURL(v)
|
||||
}
|
||||
if v, ok := args["description"].(string); ok {
|
||||
changes["description"] = v
|
||||
}
|
||||
if v, ok := args["health_check_url"].(string); ok {
|
||||
changes["health_check_url"] = strings.TrimSpace(v)
|
||||
}
|
||||
if v, ok := args["is_enabled"].(bool); ok {
|
||||
changes["is_enabled"] = v
|
||||
}
|
||||
if v, ok := args["health_check_enabled"].(bool); ok {
|
||||
changes["health_check_enabled"] = v
|
||||
}
|
||||
if v, ok := args["tags"]; ok {
|
||||
if arr, ok := v.([]interface{}); ok {
|
||||
changes["tags"] = tagsToString(arr)
|
||||
}
|
||||
}
|
||||
if cat, ok := args["category"].(string); ok && strings.TrimSpace(cat) != "" {
|
||||
cid, err := ensureCategory(strings.TrimSpace(cat))
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("创建分类失败: %v", err)
|
||||
}
|
||||
changes["category_id"] = cid
|
||||
}
|
||||
|
||||
if len(changes) == 0 {
|
||||
return nil, fmt.Errorf("未提供任何需要更新的字段")
|
||||
}
|
||||
if err := database.DB.Model(svc).Updates(changes).Error; err != nil {
|
||||
return nil, fmt.Errorf("更新失败: %v", err)
|
||||
}
|
||||
database.DB.First(svc, svc.ID)
|
||||
return map[string]interface{}{"updated": true, "message": fmt.Sprintf("已更新服务「%s」", svc.Name), "service": svc}, nil
|
||||
}
|
||||
|
||||
// toolDeleteService 删除服务
|
||||
func toolDeleteService(args map[string]interface{}) (interface{}, error) {
|
||||
id, _ := args["id"].(float64)
|
||||
name, _ := args["name"].(string)
|
||||
svc, err := findService(id, name)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("未找到服务: %v", err)
|
||||
}
|
||||
if err := database.DB.Delete(svc).Error; err != nil {
|
||||
return nil, fmt.Errorf("删除失败: %v", err)
|
||||
}
|
||||
return map[string]interface{}{"deleted": true, "message": fmt.Sprintf("已删除服务「%s」(id=%d)", svc.Name, svc.ID)}, nil
|
||||
}
|
||||
|
||||
// ============ JSON-RPC 处理 ============
|
||||
|
||||
func mcpResult(id json.RawMessage, result interface{}) gin.H {
|
||||
var idVal interface{}
|
||||
if len(id) > 0 {
|
||||
_ = json.Unmarshal(id, &idVal)
|
||||
}
|
||||
return gin.H{"jsonrpc": "2.0", "id": idVal, "result": result}
|
||||
}
|
||||
|
||||
func mcpError(id json.RawMessage, code int, msg string) gin.H {
|
||||
var idVal interface{}
|
||||
if len(id) > 0 {
|
||||
_ = json.Unmarshal(id, &idVal)
|
||||
}
|
||||
return gin.H{"jsonrpc": "2.0", "id": idVal, "error": gin.H{"code": code, "message": msg}}
|
||||
}
|
||||
|
||||
func callTool(name string, args map[string]interface{}) (interface{}, error) {
|
||||
switch name {
|
||||
case "tonav_add_service":
|
||||
return toolAddService(args)
|
||||
case "tonav_create_category":
|
||||
return toolCreateCategory(args)
|
||||
case "tonav_list_categories":
|
||||
return toolListCategories(args)
|
||||
case "tonav_list_services":
|
||||
return toolListServices(args)
|
||||
case "tonav_update_service":
|
||||
return toolUpdateService(args)
|
||||
case "tonav_delete_service":
|
||||
return toolDeleteService(args)
|
||||
default:
|
||||
return nil, fmt.Errorf("未知工具: %s", name)
|
||||
}
|
||||
}
|
||||
|
||||
// MCPHandler 处理 POST /mcp (Streamable HTTP)
|
||||
func MCPHandler(c *gin.Context) {
|
||||
body, err := io.ReadAll(io.LimitReader(c.Request.Body, 1024*1024))
|
||||
if err != nil {
|
||||
c.JSON(http.StatusBadRequest, mcpError(nil, -32700, "读取请求失败"))
|
||||
return
|
||||
}
|
||||
|
||||
// 支持批量调用
|
||||
var batch []jsonRPCRequest
|
||||
var single jsonRPCRequest
|
||||
if err := json.Unmarshal(body, &batch); err == nil && len(batch) > 0 {
|
||||
responses := make([]gin.H, 0, len(batch))
|
||||
for _, req := range batch {
|
||||
if resp := handleMCPRequest(req); resp != nil {
|
||||
responses = append(responses, resp)
|
||||
}
|
||||
}
|
||||
if len(responses) == 0 {
|
||||
c.Status(http.StatusAccepted)
|
||||
return
|
||||
}
|
||||
c.JSON(http.StatusOK, responses)
|
||||
return
|
||||
}
|
||||
|
||||
if err := json.Unmarshal(body, &single); err != nil {
|
||||
c.JSON(http.StatusBadRequest, mcpError(nil, -32700, "解析错误: "+err.Error()))
|
||||
return
|
||||
}
|
||||
|
||||
resp := handleMCPRequest(single)
|
||||
if resp == nil {
|
||||
// notification -> 202 Accepted
|
||||
c.Status(http.StatusAccepted)
|
||||
return
|
||||
}
|
||||
c.JSON(http.StatusOK, resp)
|
||||
}
|
||||
|
||||
// handleMCPRequest 处理单条 JSON-RPC 请求；notification 返回 nil
|
||||
func handleMCPRequest(req jsonRPCRequest) gin.H {
|
||||
switch req.Method {
|
||||
case "initialize":
|
||||
proto, _ := strconv.Unquote(string(req.Params))
|
||||
_ = proto
|
||||
return mcpResult(req.ID, map[string]interface{}{
|
||||
"protocolVersion": "2025-03-26",
|
||||
"capabilities": map[string]interface{}{
|
||||
"tools": map[string]interface{}{"listChanged": false},
|
||||
},
|
||||
"serverInfo": map[string]interface{}{
|
||||
"name": "tonav-mcp",
|
||||
"version": "1.0.0",
|
||||
},
|
||||
})
|
||||
|
||||
case "notifications/initialized", "initialized":
|
||||
return nil // notification
|
||||
|
||||
case "ping":
|
||||
return mcpResult(req.ID, map[string]interface{}{})
|
||||
|
||||
case "tools/list":
|
||||
return mcpResult(req.ID, map[string]interface{}{"tools": mcpToolDefs()})
|
||||
|
||||
case "tools/call":
|
||||
var params struct {
|
||||
Name string `json:"name"`
|
||||
Arguments map[string]interface{} `json:"arguments"`
|
||||
}
|
||||
if err := json.Unmarshal(req.Params, ¶ms); err != nil {
|
||||
return mcpError(req.ID, -32602, "参数解析失败: "+err.Error())
|
||||
}
|
||||
if params.Arguments == nil {
|
||||
params.Arguments = map[string]interface{}{}
|
||||
}
|
||||
result, err := callTool(params.Name, params.Arguments)
|
||||
if err != nil {
|
||||
return mcpResult(req.ID, map[string]interface{}{
|
||||
"content": []map[string]interface{}{{
|
||||
"type": "text",
|
||||
"text": "工具执行失败: " + err.Error(),
|
||||
}},
|
||||
"isError": true,
|
||||
})
|
||||
}
|
||||
data, _ := json.Marshal(result)
|
||||
return mcpResult(req.ID, map[string]interface{}{
|
||||
"content": []map[string]interface{}{{
|
||||
"type": "text",
|
||||
"text": string(data),
|
||||
}},
|
||||
})
|
||||
|
||||
default:
|
||||
return mcpError(req.ID, -32601, "未知方法: "+req.Method)
|
||||
}
|
||||
}
|
||||
|
||||
// GetMCPHeaderToken 供测试使用
|
||||
func GetMCPHeaderToken() string {
|
||||
return mcpToken
|
||||
}
|
||||
Reference in New Issue
Block a user