第一版本

internal/handlers/handlers.go

@@ -0,0 +1,129 @@
+package handlers
+
+import (
+	"encoding/json"
+	"html/template"
+	"net/http"
+	"path/filepath"
+
+	"chuan/internal/models"
+	"chuan/internal/services"
+)
+
+type Handler struct {
+	p2pService *services.P2PService
+	templates  map[string]*template.Template
+}
+
+func NewHandler(p2pService *services.P2PService) *Handler {
+	h := &Handler{
+		p2pService: p2pService,
+		templates:  make(map[string]*template.Template),
+	}
+
+	// 加载模板
+	h.loadTemplates()
+	return h
+}
+
+// 加载模板
+func (h *Handler) loadTemplates() {
+	templateDir := "web/templates"
+
+	// 加载基础模板
+	baseTemplate := filepath.Join(templateDir, "base.html")
+
+	// 加载各个页面模板
+	templates := []string{"index.html"}
+
+	for _, tmplName := range templates {
+		tmplPath := filepath.Join(templateDir, tmplName)
+		tmpl, err := template.ParseFiles(baseTemplate, tmplPath)
+		if err != nil {
+			panic("加载模板失败: " + err.Error())
+		}
+		h.templates[tmplName] = tmpl
+		println("模板加载成功:", tmplName)
+	}
+}
+
+// IndexHandler 首页处理器
+func (h *Handler) IndexHandler(w http.ResponseWriter, r *http.Request) {
+	tmpl, exists := h.templates["index.html"]
+	if !exists {
+		http.Error(w, "模板不存在", http.StatusInternalServerError)
+		return
+	}
+
+	data := map[string]interface{}{
+		"Title": "P2P文件传输",
+	}
+
+	if err := tmpl.Execute(w, data); err != nil {
+		http.Error(w, "渲染模板失败: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+}
+
+// CreateRoomHandler 创建房间API
+func (h *Handler) CreateRoomHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "方法不允许", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var req struct {
+		Files []models.FileTransferInfo `json:"files"`
+	}
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, "解析请求失败", http.StatusBadRequest)
+		return
+	}
+
+	// 创建房间
+	code := h.p2pService.CreateRoom(req.Files)
+
+	response := map[string]interface{}{
+		"success": true,
+		"code":    code,
+		"message": "房间创建成功",
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(response)
+}
+
+// GetRoomInfoHandler 获取房间信息API
+func (h *Handler) GetRoomInfoHandler(w http.ResponseWriter, r *http.Request) {
+	code := r.URL.Query().Get("code")
+	if code == "" {
+		http.Error(w, "缺少取件码", http.StatusBadRequest)
+		return
+	}
+
+	room, exists := h.p2pService.GetRoomByCode(code)
+	if !exists {
+		response := map[string]interface{}{
+			"success": false,
+			"message": "取件码不存在或已过期",
+		}
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(response)
+		return
+	}
+
+	response := map[string]interface{}{
+		"success": true,
+		"files":   room.Files,
+		"message": "房间信息获取成功",
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(response)
+}
+
+// HandleP2PWebSocket 处理P2P WebSocket连接
+func (h *Handler) HandleP2PWebSocket(w http.ResponseWriter, r *http.Request) {
+	h.p2pService.HandleWebSocket(w, r)
+}

internal/models/models.go

@@ -0,0 +1,68 @@
+package models
+
+import (
+	"time"
+)
+
+// FileInfo 文件信息结构
+type FileInfo struct {
+	ID          string    `json:"id"`
+	FileName    string    `json:"filename"`
+	FileSize    int64     `json:"file_size"`
+	ContentType string    `json:"content_type"`
+	Code        string    `json:"code"`
+	UploadTime  time.Time `json:"upload_time"`
+	ExpiryTime  time.Time `json:"expiry_time"`
+	DownloadURL string    `json:"download_url"`
+	FilePath    string    `json:"file_path"`
+}
+
+// UploadResponse 上传响应结构
+type UploadResponse struct {
+	Success     bool     `json:"success"`
+	Message     string   `json:"message"`
+	Code        string   `json:"code,omitempty"`
+	FileInfo    FileInfo `json:"file_info,omitempty"`
+	DownloadURL string   `json:"download_url,omitempty"`
+}
+
+// WebRTCOffer WebRTC offer 结构
+type WebRTCOffer struct {
+	SDP  string `json:"sdp"`
+	Type string `json:"type"`
+}
+
+// WebRTCAnswer WebRTC answer 结构
+type WebRTCAnswer struct {
+	SDP  string `json:"sdp"`
+	Type string `json:"type"`
+}
+
+// WebRTCICECandidate ICE candidate 结构
+type WebRTCICECandidate struct {
+	Candidate     string `json:"candidate"`
+	SDPMLineIndex int    `json:"sdpMLineIndex"`
+	SDPMid        string `json:"sdpMid"`
+}
+
+// VideoMessage 视频消息结构
+type VideoMessage struct {
+	Type    string      `json:"type"`
+	Payload interface{} `json:"payload"`
+}
+
+// FileTransferInfo P2P文件传输信息
+type FileTransferInfo struct {
+	ID           string `json:"id"`
+	Name         string `json:"name"`
+	Size         int64  `json:"size"`
+	Type         string `json:"type"`
+	LastModified int64  `json:"lastModified"`
+}
+
+// ErrorResponse 错误响应结构
+type ErrorResponse struct {
+	Success bool   `json:"success"`
+	Message string `json:"message"`
+	Code    string `json:"code,omitempty"`
+}

internal/services/file_service.go

@@ -0,0 +1,168 @@
+package services
+
+import (
+	"crypto/rand"
+	"fmt"
+	"io"
+	"mime/multipart"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"chuan/internal/models"
+
+	"github.com/google/uuid"
+)
+
+type FileService struct {
+	uploadDir string
+}
+
+func NewFileService() *FileService {
+	return &FileService{
+		uploadDir: "./uploads",
+	}
+}
+
+// SaveFile 保存上传的文件
+func (fs *FileService) SaveFile(file multipart.File, header *multipart.FileHeader) (*models.FileInfo, error) {
+	// 生成唯一文件ID
+	fileID := uuid.New().String()
+
+	// 生成取件码
+	code := fs.generateCode()
+
+	// 创建文件路径
+	fileExt := filepath.Ext(header.Filename)
+	fileName := fmt.Sprintf("%s%s", fileID, fileExt)
+	filePath := filepath.Join(fs.uploadDir, fileName)
+
+	// 确保上传目录存在
+	if err := os.MkdirAll(fs.uploadDir, 0755); err != nil {
+		return nil, fmt.Errorf("创建上传目录失败: %v", err)
+	}
+
+	// 创建目标文件
+	dst, err := os.Create(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("创建文件失败: %v", err)
+	}
+	defer dst.Close()
+
+	// 复制文件内容
+	size, err := io.Copy(dst, file)
+	if err != nil {
+		return nil, fmt.Errorf("保存文件失败: %v", err)
+	}
+
+	// 获取文件内容类型
+	contentType := header.Header.Get("Content-Type")
+	if contentType == "" {
+		contentType = fs.getContentType(header.Filename)
+	}
+
+	fileInfo := &models.FileInfo{
+		ID:          fileID,
+		FileName:    header.Filename,
+		FileSize:    size,
+		ContentType: contentType,
+		Code:        code,
+		UploadTime:  time.Now(),
+		ExpiryTime:  time.Now().Add(24 * time.Hour), // 24小时过期
+		FilePath:    filePath,
+		DownloadURL: fmt.Sprintf("/download/%s", code),
+	}
+
+	// 存储文件信息到内存（生产环境应使用Redis）
+	store := GetStore()
+	if err := store.StoreFileInfo(fileInfo); err != nil {
+		return nil, fmt.Errorf("存储文件信息失败: %v", err)
+	}
+
+	return fileInfo, nil
+}
+
+// generateCode 生成6位取件码
+func (fs *FileService) generateCode() string {
+	const charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	b := make([]byte, 6)
+	rand.Read(b)
+	for i := range b {
+		b[i] = charset[b[i]%byte(len(charset))]
+	}
+	return string(b)
+}
+
+// getContentType 根据文件扩展名获取内容类型
+func (fs *FileService) getContentType(filename string) string {
+	ext := strings.ToLower(filepath.Ext(filename))
+	switch ext {
+	case ".pdf":
+		return "application/pdf"
+	case ".epub":
+		return "application/epub+zip"
+	case ".mobi":
+		return "application/x-mobipocket-ebook"
+	case ".txt":
+		return "text/plain"
+	case ".jpg", ".jpeg":
+		return "image/jpeg"
+	case ".png":
+		return "image/png"
+	case ".gif":
+		return "image/gif"
+	case ".mp4":
+		return "video/mp4"
+	case ".avi":
+		return "video/avi"
+	case ".mov":
+		return "video/quicktime"
+	case ".zip":
+		return "application/zip"
+	case ".rar":
+		return "application/x-rar-compressed"
+	case ".7z":
+		return "application/x-7z-compressed"
+	default:
+		return "application/octet-stream"
+	}
+}
+
+// GetFileByCode 根据取件码获取文件信息
+func (fs *FileService) GetFileByCode(code string) (*models.FileInfo, error) {
+	store := GetStore()
+	return store.GetFileInfo(code)
+}
+
+// DeleteFile 删除文件
+func (fs *FileService) DeleteFile(code string) error {
+	fileInfo, err := fs.GetFileByCode(code)
+	if err != nil {
+		return err
+	}
+
+	// 删除物理文件
+	if err := os.Remove(fileInfo.FilePath); err != nil {
+		return fmt.Errorf("删除文件失败: %v", err)
+	}
+
+	// 从内存存储删除文件信息
+	store := GetStore()
+	store.DeleteFileInfo(code)
+
+	return nil
+}
+
+// ConvertEpubToMobi 将EPUB转换为MOBI格式
+func (fs *FileService) ConvertEpubToMobi(epubPath string) (string, error) {
+	// TODO: 集成Calibre API进行格式转换
+	// 这里暂时返回原文件路径
+	return epubPath, fmt.Errorf("格式转换功能尚未实现")
+}
+
+// CleanExpiredFiles 清理过期文件
+func (fs *FileService) CleanExpiredFiles() error {
+	// TODO: 实现定期清理过期文件的逻辑
+	return nil
+}

internal/services/memory_store.go

@@ -0,0 +1,61 @@
+package services
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"chuan/internal/models"
+)
+
+// 内存存储（生产环境应使用Redis）
+type MemoryStore struct {
+	files map[string]*models.FileInfo
+	mutex sync.RWMutex
+}
+
+var globalStore = &MemoryStore{
+	files: make(map[string]*models.FileInfo),
+}
+
+// StoreFileInfo 存储文件信息
+func (ms *MemoryStore) StoreFileInfo(fileInfo *models.FileInfo) error {
+	ms.mutex.Lock()
+	defer ms.mutex.Unlock()
+
+	ms.files[fileInfo.Code] = fileInfo
+	return nil
+}
+
+// GetFileInfo 获取文件信息
+func (ms *MemoryStore) GetFileInfo(code string) (*models.FileInfo, error) {
+	ms.mutex.RLock()
+	defer ms.mutex.RUnlock()
+
+	fileInfo, exists := ms.files[code]
+	if !exists {
+		return nil, fmt.Errorf("文件不存在或已过期")
+	}
+
+	// 检查是否过期
+	if time.Now().After(fileInfo.ExpiryTime) {
+		delete(ms.files, code)
+		return nil, fmt.Errorf("文件已过期")
+	}
+
+	return fileInfo, nil
+}
+
+// DeleteFileInfo 删除文件信息
+func (ms *MemoryStore) DeleteFileInfo(code string) error {
+	ms.mutex.Lock()
+	defer ms.mutex.Unlock()
+
+	delete(ms.files, code)
+	return nil
+}
+
+// GetStore 获取全局存储实例
+func GetStore() *MemoryStore {
+	return globalStore
+}

internal/services/p2p_service.go

@@ -0,0 +1,256 @@
+package services
+
+import (
+	"log"
+	"math/rand"
+	"net/http"
+	"strconv"
+	"sync"
+	"time"
+
+	"chuan/internal/models"
+
+	"github.com/gorilla/websocket"
+)
+
+type FileTransferRoom struct {
+	ID        string
+	Code      string                    // 取件码
+	Files     []models.FileTransferInfo // 待传输文件信息
+	Sender    *websocket.Conn           // 发送方连接
+	Receiver  *websocket.Conn           // 接收方连接
+	CreatedAt time.Time                 // 创建时间
+	mutex     sync.RWMutex
+}
+
+type P2PService struct {
+	rooms    map[string]*FileTransferRoom // 使用取件码作为key
+	roomsMux sync.RWMutex
+	upgrader websocket.Upgrader
+}
+
+func NewP2PService() *P2PService {
+	service := &P2PService{
+		rooms:    make(map[string]*FileTransferRoom),
+		roomsMux: sync.RWMutex{},
+		upgrader: websocket.Upgrader{
+			CheckOrigin: func(r *http.Request) bool {
+				return true // 允许所有来源，生产环境应当限制
+			},
+		},
+	}
+
+	// 启动房间清理任务
+	go service.cleanupExpiredRooms()
+
+	return service
+}
+
+// CreateRoom 创建新房间并返回取件码
+func (p *P2PService) CreateRoom(files []models.FileTransferInfo) string {
+	code := generatePickupCode()
+
+	p.roomsMux.Lock()
+	defer p.roomsMux.Unlock()
+
+	room := &FileTransferRoom{
+		ID:        "room_" + code,
+		Code:      code,
+		Files:     files,
+		CreatedAt: time.Now(),
+	}
+
+	p.rooms[code] = room
+	log.Printf("创建房间，取件码: %s，文件数量: %d", code, len(files))
+
+	return code
+}
+
+// GetRoomByCode 根据取件码获取房间
+func (p *P2PService) GetRoomByCode(code string) (*FileTransferRoom, bool) {
+	p.roomsMux.RLock()
+	defer p.roomsMux.RUnlock()
+
+	room, exists := p.rooms[code]
+	return room, exists
+}
+
+// HandleWebSocket 处理WebSocket连接
+func (p *P2PService) HandleWebSocket(w http.ResponseWriter, r *http.Request) {
+	conn, err := p.upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		log.Printf("WebSocket升级失败: %v", err)
+		return
+	}
+	defer conn.Close()
+
+	// 获取取件码和角色
+	code := r.URL.Query().Get("code")
+	role := r.URL.Query().Get("role") // "sender" or "receiver"
+
+	if code == "" || (role != "sender" && role != "receiver") {
+		log.Printf("缺少取件码或角色参数")
+		return
+	}
+
+	// 获取房间
+	room, exists := p.GetRoomByCode(code)
+	if !exists {
+		log.Printf("房间不存在: %s", code)
+		return
+	}
+
+	// 设置连接
+	room.mutex.Lock()
+	if role == "sender" {
+		room.Sender = conn
+		log.Printf("发送方连接到房间: %s", code)
+	} else {
+		room.Receiver = conn
+		log.Printf("接收方连接到房间: %s", code)
+
+		// 发送文件列表给接收方
+		filesMsg := models.VideoMessage{
+			Type:    "file-list",
+			Payload: map[string]interface{}{"files": room.Files},
+		}
+		if err := conn.WriteJSON(filesMsg); err != nil {
+			log.Printf("发送文件列表失败: %v", err)
+		}
+
+		// 通知发送方接收方已连接
+		if room.Sender != nil {
+			readyMsg := models.VideoMessage{
+				Type:    "receiver-ready",
+				Payload: map[string]interface{}{},
+			}
+			if err := room.Sender.WriteJSON(readyMsg); err != nil {
+				log.Printf("发送接收方就绪消息失败: %v", err)
+			}
+		}
+	}
+	room.mutex.Unlock() // 连接关闭时清理
+	defer func() {
+		room.mutex.Lock()
+		if role == "sender" {
+			room.Sender = nil
+		} else {
+			room.Receiver = nil
+		}
+		room.mutex.Unlock()
+
+		// 如果双方都断开连接，删除房间
+		p.cleanupRoom(code)
+	}()
+
+	// 处理消息
+	for {
+		var msg models.VideoMessage
+		err := conn.ReadJSON(&msg)
+		if err != nil {
+			log.Printf("读取WebSocket消息失败: %v", err)
+			break
+		}
+
+		log.Printf("收到WebSocket消息: 类型=%s, 来自=%s, 房间=%s", msg.Type, role, code)
+
+		// 转发消息到对方
+		p.forwardMessage(room, role, msg)
+	}
+}
+
+// forwardMessage 转发消息到对方
+func (p *P2PService) forwardMessage(room *FileTransferRoom, senderRole string, msg models.VideoMessage) {
+	room.mutex.RLock()
+	defer room.mutex.RUnlock()
+
+	var targetConn *websocket.Conn
+	var targetRole string
+	if senderRole == "sender" && room.Receiver != nil {
+		targetConn = room.Receiver
+		targetRole = "receiver"
+	} else if senderRole == "receiver" && room.Sender != nil {
+		targetConn = room.Sender
+		targetRole = "sender"
+	}
+
+	if targetConn != nil {
+		log.Printf("转发消息: 类型=%s, 从%s到%s", msg.Type, senderRole, targetRole)
+		if err := targetConn.WriteJSON(msg); err != nil {
+			log.Printf("转发消息失败: %v", err)
+		} else {
+			log.Printf("消息转发成功: 类型=%s", msg.Type)
+		}
+	} else {
+		log.Printf("无法转发消息: 目标连接不存在, 发送方=%s", senderRole)
+	}
+}
+
+// cleanupRoom 清理房间
+func (p *P2PService) cleanupRoom(code string) {
+	p.roomsMux.Lock()
+	defer p.roomsMux.Unlock()
+
+	if room, exists := p.rooms[code]; exists {
+		room.mutex.RLock()
+		bothDisconnected := room.Sender == nil && room.Receiver == nil
+		room.mutex.RUnlock()
+
+		if bothDisconnected {
+			delete(p.rooms, code)
+			log.Printf("清理房间: %s", code)
+		}
+	}
+}
+
+// cleanupExpiredRooms 定期清理过期房间
+func (p *P2PService) cleanupExpiredRooms() {
+	ticker := time.NewTicker(5 * time.Minute)
+	defer ticker.Stop()
+
+	for range ticker.C {
+		p.roomsMux.Lock()
+		now := time.Now()
+		for code, room := range p.rooms {
+			// 房间存在超过1小时则删除
+			if now.Sub(room.CreatedAt) > time.Hour {
+				delete(p.rooms, code)
+				log.Printf("清理过期房间: %s", code)
+			}
+		}
+		p.roomsMux.Unlock()
+	}
+}
+
+// generatePickupCode 生成6位取件码
+func generatePickupCode() string {
+	rand.Seed(time.Now().UnixNano())
+	code := rand.Intn(900000) + 100000
+	return strconv.Itoa(code)
+}
+
+// GetRoomStats 获取房间统计信息
+func (p *P2PService) GetRoomStats() map[string]interface{} {
+	p.roomsMux.RLock()
+	defer p.roomsMux.RUnlock()
+
+	stats := map[string]interface{}{
+		"total_rooms": len(p.rooms),
+		"rooms":       make([]map[string]interface{}, 0),
+	}
+
+	for code, room := range p.rooms {
+		room.mutex.RLock()
+		roomInfo := map[string]interface{}{
+			"code":         code,
+			"file_count":   len(room.Files),
+			"has_sender":   room.Sender != nil,
+			"has_receiver": room.Receiver != nil,
+			"created_at":   room.CreatedAt,
+		}
+		room.mutex.RUnlock()
+		stats["rooms"] = append(stats["rooms"].([]map[string]interface{}), roomInfo)
+	}
+
+	return stats
+}

internal/services/webrtc_service.go

@@ -0,0 +1,175 @@
+package services
+
+import (
+	"log"
+	"net/http"
+	"sync"
+
+	"chuan/internal/models"
+
+	"github.com/gorilla/websocket"
+)
+
+type WebRTCService struct {
+	clients    map[string]*websocket.Conn
+	clientsMux sync.RWMutex
+	upgrader   websocket.Upgrader
+}
+
+func NewWebRTCService() *WebRTCService {
+	return &WebRTCService{
+		clients:    make(map[string]*websocket.Conn),
+		clientsMux: sync.RWMutex{},
+		upgrader: websocket.Upgrader{
+			CheckOrigin: func(r *http.Request) bool {
+				return true // 允许所有来源，生产环境应当限制
+			},
+		},
+	}
+}
+
+// HandleWebSocket 处理WebSocket连接
+func (ws *WebRTCService) HandleWebSocket(w http.ResponseWriter, r *http.Request) {
+	conn, err := ws.upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		log.Printf("WebSocket升级失败: %v", err)
+		return
+	}
+	defer conn.Close()
+
+	// 为客户端生成唯一ID
+	clientID := ws.generateClientID()
+
+	// 添加客户端到连接池
+	ws.clientsMux.Lock()
+	ws.clients[clientID] = conn
+	ws.clientsMux.Unlock()
+
+	// 连接关闭时清理
+	defer func() {
+		ws.clientsMux.Lock()
+		delete(ws.clients, clientID)
+		ws.clientsMux.Unlock()
+	}()
+
+	// 发送欢迎消息
+	welcomeMsg := models.VideoMessage{
+		Type:    "welcome",
+		Payload: map[string]string{"clientId": clientID},
+	}
+	ws.sendMessage(conn, welcomeMsg)
+
+	// 处理消息
+	for {
+		var msg models.VideoMessage
+		err := conn.ReadJSON(&msg)
+		if err != nil {
+			log.Printf("读取WebSocket消息失败: %v", err)
+			break
+		}
+
+		switch msg.Type {
+		case "offer":
+			ws.handleOffer(clientID, msg)
+		case "answer":
+			ws.handleAnswer(clientID, msg)
+		case "ice-candidate":
+			ws.handleICECandidate(clientID, msg)
+		case "join-room":
+			ws.handleJoinRoom(clientID, msg)
+		case "leave-room":
+			ws.handleLeaveRoom(clientID, msg)
+		default:
+			log.Printf("未知消息类型: %s", msg.Type)
+		}
+	}
+}
+
+// handleOffer 处理WebRTC Offer
+func (ws *WebRTCService) handleOffer(clientID string, msg models.VideoMessage) {
+	// 广播offer到其他客户端
+	ws.broadcastToOthers(clientID, msg)
+}
+
+// handleAnswer 处理WebRTC Answer
+func (ws *WebRTCService) handleAnswer(clientID string, msg models.VideoMessage) {
+	// 广播answer到其他客户端
+	ws.broadcastToOthers(clientID, msg)
+}
+
+// handleICECandidate 处理ICE candidate
+func (ws *WebRTCService) handleICECandidate(clientID string, msg models.VideoMessage) {
+	// 广播ICE candidate到其他客户端
+	ws.broadcastToOthers(clientID, msg)
+}
+
+// handleJoinRoom 处理加入房间
+func (ws *WebRTCService) handleJoinRoom(clientID string, msg models.VideoMessage) {
+	// TODO: 实现房间管理逻辑
+	log.Printf("客户端 %s 加入房间", clientID)
+}
+
+// handleLeaveRoom 处理离开房间
+func (ws *WebRTCService) handleLeaveRoom(clientID string, msg models.VideoMessage) {
+	// TODO: 实现房间管理逻辑
+	log.Printf("客户端 %s 离开房间", clientID)
+}
+
+// broadcastToOthers 向其他客户端广播消息
+func (ws *WebRTCService) broadcastToOthers(senderID string, msg models.VideoMessage) {
+	ws.clientsMux.RLock()
+	defer ws.clientsMux.RUnlock()
+
+	for clientID, conn := range ws.clients {
+		if clientID != senderID {
+			ws.sendMessage(conn, msg)
+		}
+	}
+}
+
+// sendMessage 发送消息到WebSocket连接
+func (ws *WebRTCService) sendMessage(conn *websocket.Conn, msg models.VideoMessage) {
+	if err := conn.WriteJSON(msg); err != nil {
+		log.Printf("发送WebSocket消息失败: %v", err)
+	}
+}
+
+// generateClientID 生成客户端ID
+func (ws *WebRTCService) generateClientID() string {
+	// 简单的ID生成，生产环境应使用更安全的方法
+	return "client_" + randomString(8)
+}
+
+// CreateOffer 创建WebRTC Offer
+func (ws *WebRTCService) CreateOffer() (*models.WebRTCOffer, error) {
+	// TODO: 实现WebRTC Offer创建
+	return &models.WebRTCOffer{
+		SDP:  "v=0\r\no=- 0 0 IN IP4 127.0.0.1\r\n...", // 示例SDP
+		Type: "offer",
+	}, nil
+}
+
+// CreateAnswer 创建WebRTC Answer
+func (ws *WebRTCService) CreateAnswer(offer *models.WebRTCOffer) (*models.WebRTCAnswer, error) {
+	// TODO: 实现WebRTC Answer创建
+	return &models.WebRTCAnswer{
+		SDP:  "v=0\r\no=- 0 0 IN IP4 127.0.0.1\r\n...", // 示例SDP
+		Type: "answer",
+	}, nil
+}
+
+// AddICECandidate 添加ICE候选
+func (ws *WebRTCService) AddICECandidate(candidate *models.WebRTCICECandidate) error {
+	// TODO: 实现ICE候选处理
+	return nil
+}
+
+// randomString 生成随机字符串
+func randomString(length int) string {
+	const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[i%len(charset)]
+	}
+	return string(b)
+}