471 lines
12 KiB
Go
471 lines
12 KiB
Go
package main
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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)
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// --- MCP Protocol Types ---
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type MCPRequest struct {
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JSONRPC string `json:"jsonrpc"`
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ID any `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 MCPResponse struct {
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JSONRPC string `json:"jsonrpc"`
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ID any `json:"id,omitempty"`
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Result any `json:"result,omitempty"`
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Error interface{} `json:"error,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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func sendMCPResponse(id any, result any) MCPResponse {
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return MCPResponse{JSONRPC: "2.0", ID: id, Result: result}
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}
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func (s *TaoServer) dispatchMCP(token string, client string, req MCPRequest) {
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var resp MCPResponse
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resp.JSONRPC = "2.0"
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resp.ID = req.ID
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switch req.Method {
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case "initialize":
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resp.Result = map[string]interface{}{
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"protocolVersion": "2025-06-18",
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"capabilities": map[string]interface{}{
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"tools": map[string]interface{}{"listChanged": false},
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"resources": map[string]interface{}{"listChanged": false},
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"prompts": map[string]interface{}{"listChanged": false},
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"logging": map[string]interface{}{},
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},
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"serverInfo": map[string]string{
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"name": "Tao-Memory-Server",
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"version": "1.2.0",
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},
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}
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case "notifications/initialized":
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log.Printf("[MCP Notify] initialized from %s", token)
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return
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case "tools/list":
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resp.Result = map[string]interface{}{
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"tools": buildToolList(),
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}
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case "tools/call":
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var params 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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_ = json.Unmarshal(req.Params, ¶ms)
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if tool, ok := ToolRegistry[params.Name]; ok {
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result, err := tool.Handler(params.Arguments)
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if err != nil {
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resp.Result = map[string]interface{}{
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"content": []MCPContent{{Type: "text", Text: "error: " + err.Error()}},
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}
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} else {
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resp.Result = map[string]interface{}{
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"content": []MCPContent{{Type: "text", Text: result}},
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}
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}
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} else {
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resp.Result = map[string]interface{}{
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"content": []MCPContent{{Type: "text", Text: "error: tool not found"}},
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}
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}
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default:
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_ = s.Record("agent_action", fmt.Sprintf("执行指令: %+v", req), 2)
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return
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}
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if token == "" && !getEnvBool("TAO_ALLOW_ANON", false) {
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log.Printf("[MCP Response] missing token for method=%s", req.Method)
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return
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}
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connKey := buildConnKey(token, client)
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if ch, ok := s.conns.Load(connKey); ok {
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if b, err := json.Marshal(resp); err == nil {
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ch.(chan string) <- string(b)
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log.Printf("[MCP Response] sent via SSE method=%s", req.Method)
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}
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} else {
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log.Printf("[MCP Response] no SSE channel for token=%s client=%s method=%s", token, client, req.Method)
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}
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}
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func getEnv(key, def string) string {
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if v := os.Getenv(key); v != "" {
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return v
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}
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return def
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}
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func getEnvBool(key string, def bool) bool {
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v := strings.ToLower(strings.TrimSpace(os.Getenv(key)))
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if v == "" {
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return def
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}
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switch v {
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case "1", "true", "yes", "on":
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return true
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case "0", "false", "no", "off":
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return false
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default:
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return def
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}
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}
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func getEnvInt(key string, def int) int {
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if v := os.Getenv(key); v != "" {
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if n, err := strconv.Atoi(v); err == nil {
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return n
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}
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}
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return def
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}
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func extractToken(r *http.Request) (string, bool) {
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if q := r.URL.Query().Get("token"); q != "" {
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return q, true
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}
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h := r.Header.Get("Authorization")
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if strings.HasPrefix(h, "Bearer ") {
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return strings.TrimSpace(strings.TrimPrefix(h, "Bearer ")), false
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}
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return "", false
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}
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func buildConnKey(token string, client string) string {
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if token == "" {
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token = "anon"
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}
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if client != "" {
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return token + "_" + client
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}
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return token
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}
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func generateClientID() string {
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return fmt.Sprintf("c%d", time.Now().UnixNano())
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}
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func parseCORSOrigins() (bool, []string) {
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raw := strings.TrimSpace(os.Getenv("TAO_CORS_ORIGINS"))
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if raw == "" {
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return false, nil
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}
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if raw == "*" {
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return true, nil
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}
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parts := strings.Split(raw, ",")
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var origins []string
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for _, p := range parts {
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p = strings.TrimSpace(p)
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if p != "" {
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origins = append(origins, p)
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}
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}
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return false, origins
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}
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func setCORSHeaders(w http.ResponseWriter, r *http.Request) {
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origin := r.Header.Get("Origin")
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if origin == "" {
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return
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}
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allowAll, origins := parseCORSOrigins()
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if allowAll {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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} else {
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allowed := false
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for _, o := range origins {
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if o == origin {
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allowed = true
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break
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}
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}
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if !allowed {
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return
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}
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w.Header().Set("Access-Control-Allow-Origin", origin)
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w.Header().Set("Vary", "Origin")
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}
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
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}
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func isSubpath(path string, base string) bool {
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absPath, err1 := filepath.Abs(path)
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absBase, err2 := filepath.Abs(base)
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if err1 != nil || err2 != nil {
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return false
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}
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if absPath == absBase {
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return true
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}
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return strings.HasPrefix(absPath, absBase+string(filepath.Separator))
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}
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// --- 以简御繁：鉴权 ---
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func (s *TaoServer) checkAuth(r *http.Request) bool {
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token := getEnv("TAO_AUTH_TOKEN", "")
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if token == "" {
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return getEnvBool("TAO_ALLOW_ANON", false)
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}
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reqToken, _ := extractToken(r)
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if reqToken == token {
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return true
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}
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return false
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}
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func (s *TaoServer) requireAuth(next http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if r.Method == "OPTIONS" {
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setCORSHeaders(w, r)
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w.WriteHeader(http.StatusOK)
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return
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}
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if !s.checkAuth(r) {
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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return
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}
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next(w, r)
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}
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}
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// --- 感官 (Webhook Adapters) ---
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// 适配 Gitea 的 Push Webhook
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func (s *TaoServer) GiteaHandler(w http.ResponseWriter, r *http.Request) {
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var payload struct {
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Repository struct {
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Name string `json:"name"`
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} `json:"repository"`
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Commits []struct {
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Message string `json:"message"`
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} `json:"commits"`
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}
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if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
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http.Error(w, "Bad Request", 400)
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return
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}
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if len(payload.Commits) > 0 {
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msg := payload.Commits[0].Message
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summary := fmt.Sprintf("代码演化于 [%s]: %s", payload.Repository.Name, msg)
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_ = s.Record("code", summary, 4)
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}
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w.WriteHeader(200)
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}
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// 适配 SmsReceiver-go 的短信推送
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func (s *TaoServer) SmsHandler(w http.ResponseWriter, r *http.Request) {
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var payload struct {
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From string `json:"from"`
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Content string `json:"content"`
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}
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if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
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http.Error(w, "Bad Request", 400)
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return
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}
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summary := fmt.Sprintf("收到信号 [%s]: %s", payload.From, payload.Content)
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_ = s.Record("sms", summary, 3)
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w.WriteHeader(200)
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}
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// --- MCP SSE ---
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func (s *TaoServer) SSEHandler(w http.ResponseWriter, r *http.Request) {
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log.Printf("[SSE Connect] Remote=%s URL=%s", r.RemoteAddr, r.URL.String())
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w.Header().Set("Content-Type", "text/event-stream")
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w.Header().Set("Cache-Control", "no-cache")
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w.Header().Set("Connection", "keep-alive")
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w.Header().Set("X-Accel-Buffering", "no")
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setCORSHeaders(w, r)
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flusher, ok := w.(http.Flusher)
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if !ok {
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http.Error(w, "Streaming unsupported", http.StatusInternalServerError)
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return
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}
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// 告知客户端 POST 入口（按客户端拼接习惯输出）
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style := getEnv("TAO_ENDPOINT_STYLE", "message")
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endpoint := "mcp/message"
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if style == "message" {
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endpoint = "message"
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}
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queryToken := r.URL.Query().Get("token")
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token, _ := extractToken(r)
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if token == "" && !getEnvBool("TAO_ALLOW_ANON", false) {
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http.Error(w, "Unauthorized", http.StatusUnauthorized)
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return
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}
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client := r.URL.Query().Get("client")
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if client == "" {
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client = generateClientID()
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}
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if queryToken != "" {
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if strings.Contains(endpoint, "?") {
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endpoint = endpoint + "&token=" + queryToken
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} else {
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endpoint = endpoint + "?token=" + queryToken
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}
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}
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if client != "" {
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if strings.Contains(endpoint, "?") {
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endpoint = endpoint + "&client=" + client
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} else {
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endpoint = endpoint + "?client=" + client
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}
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}
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fmt.Fprintf(w, "event: endpoint\ndata: %s\n\n", endpoint)
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flusher.Flush()
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msgChan := make(chan string, 50)
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connKey := buildConnKey(token, client)
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s.conns.Store(connKey, msgChan)
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defer s.conns.Delete(connKey)
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ticker := time.NewTicker(5 * time.Second)
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defer ticker.Stop()
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for {
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select {
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case <-r.Context().Done():
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return
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case <-ticker.C:
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fmt.Fprintf(w, ":ping\n\n")
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flusher.Flush()
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case msg := <-msgChan:
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fmt.Fprintf(w, "event: message\ndata: %s\n\n", msg)
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flusher.Flush()
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}
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}
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}
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// --- MCP Message ---
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func (s *TaoServer) MessageHandler(w http.ResponseWriter, r *http.Request) {
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setCORSHeaders(w, r)
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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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bodyBytes, _ := io.ReadAll(r.Body)
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r.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
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if getEnvBool("TAO_DEBUG", false) {
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log.Printf("[MCP POST] From=%s URL=%s Body=%s", r.RemoteAddr, r.URL.String(), string(bodyBytes))
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} else {
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log.Printf("[MCP POST] From=%s URL=%s", r.RemoteAddr, r.URL.String())
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}
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var req MCPRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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http.Error(w, "Bad Request", 400)
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return
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}
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token, _ := extractToken(r)
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client := r.URL.Query().Get("client")
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w.WriteHeader(http.StatusAccepted)
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go s.dispatchMCP(token, client, req)
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}
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// --- MCP Unified Gateway (/mcp) ---
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func (s *TaoServer) MCPUnifiedHandler(w http.ResponseWriter, r *http.Request) {
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if r.Method == "OPTIONS" {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
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w.WriteHeader(http.StatusOK)
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return
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}
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if r.Method == http.MethodGet {
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s.SSEHandler(w, r)
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return
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}
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if r.Method == http.MethodPost {
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accept := r.Header.Get("Accept")
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if strings.Contains(accept, "text/event-stream") {
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s.SSEHandler(w, r)
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return
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}
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if r.ContentLength == 0 {
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s.SSEHandler(w, r)
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return
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}
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bodyBytes, _ := io.ReadAll(r.Body)
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r.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
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if len(bodyBytes) == 0 {
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s.SSEHandler(w, r)
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return
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}
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if strings.Contains(string(bodyBytes), "\"jsonrpc\":\"2.0\"") {
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s.MessageHandler(w, r)
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return
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}
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http.Error(w, "Bad Request", 400)
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return
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}
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http.Error(w, "Method Not Allowed", 405)
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}
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// --- 主程序 (Main) ---
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func main() {
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if getEnv("TAO_AUTH_TOKEN", "") == "" && !getEnvBool("TAO_ALLOW_ANON", false) {
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log.Fatal("TAO_AUTH_TOKEN is required unless TAO_ALLOW_ANON=true")
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}
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memoryRoot := getEnv("MEMORY_ROOT", "./knowledge_ocean")
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searchRoot := getEnv("TAO_SEARCH_ROOT", memoryRoot)
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if !isSubpath(searchRoot, memoryRoot) {
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log.Printf("TAO_SEARCH_ROOT must be under MEMORY_ROOT, fallback to MEMORY_ROOT")
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searchRoot = memoryRoot
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}
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server := &TaoServer{
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config: Config{
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MemoryRoot: memoryRoot,
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Port: getEnv("PORT", "5001"),
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SearchRoot: searchRoot,
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MaxSearchFiles: getEnvInt("TAO_SEARCH_MAX_FILES", 2000),
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},
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}
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server.RegisterTools()
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// 启动 Webhook 监听 (感知层)
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http.HandleFunc("/ingest/gitea", server.requireAuth(server.GiteaHandler))
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http.HandleFunc("/ingest/sms", server.requireAuth(server.SmsHandler))
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// MCP SSE + Message
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http.HandleFunc("/mcp/sse", server.requireAuth(server.SSEHandler))
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http.HandleFunc("/mcp", server.requireAuth(server.MCPUnifiedHandler))
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http.HandleFunc("/mcp/", server.requireAuth(server.MCPUnifiedHandler))
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http.HandleFunc("/mcp/message", server.requireAuth(server.MessageHandler))
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fmt.Printf("Tao Memory Server 启动。道场地址: :%s\n", server.config.Port)
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log.Fatal(http.ListenAndServe(":"+server.config.Port, nil))
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}
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