sandrodach
04fa774d10
MindSift CI & Docker Release / Build, Test in Container & Push (push) Successful in 1m2s
659 lines
14 KiB
Go
659 lines
14 KiB
Go
package ws
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import (
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"encoding/json"
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"fmt"
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"log/slog"
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"net/http"
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"strings"
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"sync"
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"time"
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"github.com/gorilla/websocket"
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"github.com/sandrodach/mindsift/internal/domain"
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)
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var upgrader = websocket.Upgrader{
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ReadBufferSize: 4096,
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WriteBufferSize: 4096,
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CheckOrigin: func(r *http.Request) bool {
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return true // Self-hosted reverse proxy compatible
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},
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}
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type Client struct {
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hub *Hub
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conn *websocket.Conn
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roomID string
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userID string
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send chan []byte
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subscribedRooms map[string]bool
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sendMu sync.RWMutex
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closed bool
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}
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func (c *Client) closeSend() {
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c.sendMu.Lock()
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defer c.sendMu.Unlock()
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if !c.closed {
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c.closed = true
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close(c.send)
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}
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}
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func (c *Client) trySend(data []byte) {
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c.sendMu.RLock()
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defer c.sendMu.RUnlock()
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if c.closed {
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return
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}
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select {
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case c.send <- data:
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default:
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}
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}
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type SSEClient struct {
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id string
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userID string
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roomID string
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send chan []byte
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subscribedRooms map[string]bool
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sendMu sync.RWMutex
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closed bool
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}
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func (c *SSEClient) closeSend() {
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c.sendMu.Lock()
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defer c.sendMu.Unlock()
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if !c.closed {
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c.closed = true
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close(c.send)
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}
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}
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func (c *SSEClient) trySend(data []byte) {
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c.sendMu.RLock()
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defer c.sendMu.RUnlock()
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if c.closed {
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return
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}
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select {
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case c.send <- data:
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default:
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}
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}
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type Hub struct {
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mu sync.RWMutex
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rooms map[string]map[*Client]bool
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userRooms map[string]map[*Client]bool
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allClients map[*Client]bool
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sseClients map[*SSEClient]bool
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sseUserRooms map[string]map[*SSEClient]bool
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sseRooms map[string]map[*SSEClient]bool
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closed bool
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}
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func NewHub() *Hub {
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return &Hub{
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rooms: make(map[string]map[*Client]bool),
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userRooms: make(map[string]map[*Client]bool),
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allClients: make(map[*Client]bool),
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sseClients: make(map[*SSEClient]bool),
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sseUserRooms: make(map[string]map[*SSEClient]bool),
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sseRooms: make(map[string]map[*SSEClient]bool),
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}
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}
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func (h *Hub) Register(c *Client) {
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h.mu.Lock()
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h.allClients[c] = true
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if c.roomID != "" {
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if h.rooms[c.roomID] == nil {
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h.rooms[c.roomID] = make(map[*Client]bool)
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}
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h.rooms[c.roomID][c] = true
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}
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if c.userID != "" && c.userID != "anonymous" {
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if h.userRooms[c.userID] == nil {
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h.userRooms[c.userID] = make(map[*Client]bool)
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}
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h.userRooms[c.userID][c] = true
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}
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onlineCount := len(h.allClients) + len(h.sseClients)
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h.mu.Unlock()
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if c.roomID != "" {
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h.Broadcast(c.roomID, "", "USER_PRESENCE", map[string]interface{}{
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"onlineCount": onlineCount,
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})
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}
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}
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func (h *Hub) Unregister(c *Client) {
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h.mu.Lock()
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delete(h.allClients, c)
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if c.roomID != "" {
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if room, ok := h.rooms[c.roomID]; ok {
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delete(room, c)
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if len(room) == 0 {
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delete(h.rooms, c.roomID)
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}
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}
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}
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if c.subscribedRooms != nil {
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for rID := range c.subscribedRooms {
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if room, ok := h.rooms[rID]; ok {
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delete(room, c)
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if len(room) == 0 {
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delete(h.rooms, rID)
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}
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}
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}
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}
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if c.userID != "" && c.userID != "anonymous" {
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if uRoom, ok := h.userRooms[c.userID]; ok {
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delete(uRoom, c)
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if len(uRoom) == 0 {
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delete(h.userRooms, c.userID)
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}
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}
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}
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c.closeSend()
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h.mu.Unlock()
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}
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func (h *Hub) RegisterSSE(c *SSEClient) {
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h.mu.Lock()
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h.sseClients[c] = true
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if c.roomID != "" {
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if h.sseRooms[c.roomID] == nil {
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h.sseRooms[c.roomID] = make(map[*SSEClient]bool)
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}
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h.sseRooms[c.roomID][c] = true
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}
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if c.userID != "" && c.userID != "anonymous" {
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if h.sseUserRooms[c.userID] == nil {
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h.sseUserRooms[c.userID] = make(map[*SSEClient]bool)
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}
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h.sseUserRooms[c.userID][c] = true
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}
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if c.subscribedRooms != nil {
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for rID := range c.subscribedRooms {
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if h.sseRooms[rID] == nil {
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h.sseRooms[rID] = make(map[*SSEClient]bool)
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}
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h.sseRooms[rID][c] = true
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}
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}
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onlineCount := len(h.allClients) + len(h.sseClients)
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h.mu.Unlock()
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if c.roomID != "" {
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h.Broadcast(c.roomID, "", "USER_PRESENCE", map[string]interface{}{
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"onlineCount": onlineCount,
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})
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}
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}
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func (h *Hub) UnregisterSSE(c *SSEClient) {
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h.mu.Lock()
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delete(h.sseClients, c)
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if c.roomID != "" {
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if room, ok := h.sseRooms[c.roomID]; ok {
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delete(room, c)
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if len(room) == 0 {
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delete(h.sseRooms, c.roomID)
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}
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}
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}
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if c.subscribedRooms != nil {
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for rID := range c.subscribedRooms {
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if room, ok := h.sseRooms[rID]; ok {
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delete(room, c)
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if len(room) == 0 {
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delete(h.sseRooms, rID)
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}
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}
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}
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}
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if c.userID != "" && c.userID != "anonymous" {
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if uRoom, ok := h.sseUserRooms[c.userID]; ok {
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delete(uRoom, c)
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if len(uRoom) == 0 {
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delete(h.sseUserRooms, c.userID)
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}
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}
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}
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c.closeSend()
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h.mu.Unlock()
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}
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func (h *Hub) JoinSSERoomByID(sseID, roomID string) bool {
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h.mu.Lock()
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defer h.mu.Unlock()
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for client := range h.sseClients {
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if client.id == sseID {
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if h.sseRooms[roomID] == nil {
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h.sseRooms[roomID] = make(map[*SSEClient]bool)
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}
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h.sseRooms[roomID][client] = true
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if client.subscribedRooms == nil {
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client.subscribedRooms = make(map[string]bool)
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}
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client.subscribedRooms[roomID] = true
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return true
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}
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}
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return false
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}
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func (h *Hub) LeaveSSERoomByID(sseID, roomID string) bool {
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h.mu.Lock()
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defer h.mu.Unlock()
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for client := range h.sseClients {
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if client.id == sseID {
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if room, ok := h.sseRooms[roomID]; ok {
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delete(room, client)
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if len(room) == 0 {
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delete(h.sseRooms, roomID)
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}
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}
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if client.subscribedRooms != nil {
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delete(client.subscribedRooms, roomID)
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}
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return true
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}
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}
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return false
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}
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// Close gracefully disconnects all WebSocket and SSE connections so HTTP shutdown completes immediately.
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func (h *Hub) Close() {
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h.mu.Lock()
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if h.closed {
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h.mu.Unlock()
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return
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}
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h.closed = true
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allWsClients := make([]*Client, 0, len(h.allClients))
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for c := range h.allClients {
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allWsClients = append(allWsClients, c)
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}
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allSSEClients := make([]*SSEClient, 0, len(h.sseClients))
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for c := range h.sseClients {
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allSSEClients = append(allSSEClients, c)
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}
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h.mu.Unlock()
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for _, c := range allWsClients {
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_ = c.conn.Close()
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c.closeSend()
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}
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for _, c := range allSSEClients {
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c.closeSend()
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}
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}
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// Broadcasting Methods
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func (h *Hub) BroadcastToAll(event string, payload interface{}) {
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msg := domain.WSMessage{
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Event: event,
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Payload: payload,
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Timestamp: domain.NowISO(),
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}
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data, err := json.Marshal(msg)
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if err != nil {
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return
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}
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h.mu.RLock()
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if h.closed {
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h.mu.RUnlock()
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return
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}
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defer h.mu.RUnlock()
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for client := range h.allClients {
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client.trySend(data)
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}
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for sseClient := range h.sseClients {
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sseClient.trySend(data)
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}
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}
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func (h *Hub) BroadcastToUser(userID, event string, payload interface{}) {
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msg := domain.WSMessage{
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Event: event,
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Payload: payload,
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Timestamp: domain.NowISO(),
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}
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data, err := json.Marshal(msg)
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if err != nil {
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return
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}
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h.mu.RLock()
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if h.closed {
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h.mu.RUnlock()
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return
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}
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defer h.mu.RUnlock()
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if room, ok := h.userRooms[userID]; ok {
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for client := range room {
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client.trySend(data)
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}
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}
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if sseRoom, ok := h.sseUserRooms[userID]; ok {
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for sseClient := range sseRoom {
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sseClient.trySend(data)
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}
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}
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}
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func (h *Hub) BroadcastTaskEvent(userID, event string, payload interface{}) {
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h.BroadcastToUser(userID, event, payload)
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}
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func (h *Hub) BroadcastDocEvent(docID, event string, payload interface{}) {
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if docID != "" {
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h.BroadcastRoom("doc:"+docID, event, payload, nil)
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} else {
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h.BroadcastToAll(event, payload)
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}
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}
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func (h *Hub) Broadcast(spaceID, listID, event string, payload interface{}) {
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msg := domain.WSMessage{
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Event: event,
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ListID: listID,
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Payload: payload,
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Timestamp: domain.NowISO(),
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}
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data, err := json.Marshal(msg)
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if err != nil {
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return
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}
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h.mu.RLock()
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if h.closed {
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h.mu.RUnlock()
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return
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}
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defer h.mu.RUnlock()
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targetRoom := listID
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if targetRoom == "" {
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targetRoom = spaceID
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}
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if room, ok := h.rooms[targetRoom]; ok {
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for client := range room {
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client.trySend(data)
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}
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}
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if sseRoom, ok := h.sseRooms[targetRoom]; ok {
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for sseClient := range sseRoom {
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sseClient.trySend(data)
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}
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}
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}
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func (h *Hub) BroadcastListEvent(listID, event string, payload interface{}) {
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h.Broadcast("", listID, event, payload)
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}
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func (h *Hub) JoinRoom(c *Client, roomID string) {
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h.mu.Lock()
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defer h.mu.Unlock()
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if h.rooms[roomID] == nil {
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h.rooms[roomID] = make(map[*Client]bool)
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}
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h.rooms[roomID][c] = true
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if c.subscribedRooms == nil {
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c.subscribedRooms = make(map[string]bool)
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}
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c.subscribedRooms[roomID] = true
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}
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func (h *Hub) LeaveRoom(c *Client, roomID string) {
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h.mu.Lock()
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defer h.mu.Unlock()
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if room, ok := h.rooms[roomID]; ok {
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delete(room, c)
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if len(room) == 0 {
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delete(h.rooms, roomID)
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}
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}
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if c.subscribedRooms != nil {
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delete(c.subscribedRooms, roomID)
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}
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}
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func (h *Hub) BroadcastRoom(roomID, event string, payload interface{}, excludeClient *Client) {
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msg := domain.WSMessage{
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Event: event,
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Payload: payload,
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Timestamp: domain.NowISO(),
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}
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data, err := json.Marshal(msg)
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if err != nil {
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return
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}
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h.mu.RLock()
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if h.closed {
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h.mu.RUnlock()
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return
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}
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defer h.mu.RUnlock()
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if room, ok := h.rooms[roomID]; ok {
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for client := range room {
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if excludeClient != nil && client == excludeClient {
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continue
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}
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client.trySend(data)
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}
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}
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if sseRoom, ok := h.sseRooms[roomID]; ok {
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for sseClient := range sseRoom {
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sseClient.trySend(data)
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}
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}
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}
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func (c *Client) SendEvent(event string, payload interface{}) {
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msg := domain.WSMessage{
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Event: event,
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Payload: payload,
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Timestamp: domain.NowISO(),
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}
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data, err := json.Marshal(msg)
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if err == nil {
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c.trySend(data)
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}
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}
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func (h *Hub) ServeWS(w http.ResponseWriter, r *http.Request, roomID, userID string) {
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conn, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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slog.Error("WebSocket upgrade error", "room_id", roomID, "user_id", userID, "error", err)
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return
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}
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client := &Client{
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hub: h,
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conn: conn,
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roomID: roomID,
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userID: userID,
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send: make(chan []byte, 128),
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}
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h.Register(client)
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go client.writePump()
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go client.readPump()
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}
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func (h *Hub) ServeSSE(w http.ResponseWriter, r *http.Request, roomID, userID string, initialRooms []string) {
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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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w.Header().Set("Content-Type", "text/event-stream")
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w.Header().Set("Cache-Control", "no-cache, no-transform")
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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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w.Header().Set("Access-Control-Allow-Origin", "*")
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client := &SSEClient{
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id: domain.NewID("sse"),
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userID: userID,
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roomID: roomID,
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send: make(chan []byte, 128),
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subscribedRooms: make(map[string]bool),
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}
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for _, room := range initialRooms {
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if strings.TrimSpace(room) != "" {
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client.subscribedRooms[strings.TrimSpace(room)] = true
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}
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}
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h.RegisterSSE(client)
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defer h.UnregisterSSE(client)
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// Send initial connected comment and event
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fmt.Fprintf(w, ": connected (transport: sse, id: %s)\n\n", client.id)
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connectedMsg, _ := json.Marshal(domain.WSMessage{
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Event: "SSE_CONNECTED",
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Payload: map[string]interface{}{
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"sseId": client.id,
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"transport": "sse",
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"userId": userID,
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},
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Timestamp: domain.NowISO(),
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})
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fmt.Fprintf(w, "data: %s\n\n", connectedMsg)
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flusher.Flush()
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ticker := time.NewTicker(15 * time.Second)
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defer ticker.Stop()
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notify := r.Context().Done()
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for {
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select {
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case <-notify:
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return
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case msg, ok := <-client.send:
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if !ok {
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return
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}
|
|
fmt.Fprintf(w, "data: %s\n\n", msg)
|
|
flusher.Flush()
|
|
case <-ticker.C:
|
|
// Periodic ping comment to keep HTTP connection alive and prevent proxy timeouts
|
|
fmt.Fprintf(w, ": ping\n\n")
|
|
flusher.Flush()
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *Client) readPump() {
|
|
defer func() {
|
|
c.hub.Unregister(c)
|
|
_ = c.conn.Close()
|
|
}()
|
|
|
|
c.conn.SetReadLimit(4 * 1024 * 1024) // 4MB for large document CRDT updates
|
|
_ = c.conn.SetReadDeadline(time.Now().Add(60 * time.Second))
|
|
c.conn.SetPongHandler(func(string) error {
|
|
_ = c.conn.SetReadDeadline(time.Now().Add(60 * time.Second))
|
|
return nil
|
|
})
|
|
|
|
for {
|
|
_, message, err := c.conn.ReadMessage()
|
|
if err != nil {
|
|
break
|
|
}
|
|
|
|
// Handle client-initiated lock, CRDT, room subscription, and presence messages
|
|
var incoming struct {
|
|
Event string `json:"event"`
|
|
DocID string `json:"docId"`
|
|
Room string `json:"room"`
|
|
Payload json.RawMessage `json:"payload"`
|
|
}
|
|
if json.Unmarshal(message, &incoming) == nil && c.userID != "" && c.userID != "anonymous" {
|
|
docID := incoming.DocID
|
|
if docID == "" && len(incoming.Payload) > 0 {
|
|
var p struct {
|
|
DocID string `json:"docId"`
|
|
}
|
|
_ = json.Unmarshal(incoming.Payload, &p)
|
|
docID = p.DocID
|
|
}
|
|
|
|
// Room subscription without requiring docID
|
|
if incoming.Event == "JOIN_ROOM" {
|
|
room := incoming.Room
|
|
if room == "" {
|
|
room = docID
|
|
}
|
|
if room != "" {
|
|
c.hub.JoinRoom(c, room)
|
|
}
|
|
} else if incoming.Event == "LEAVE_ROOM" {
|
|
room := incoming.Room
|
|
if room == "" {
|
|
room = docID
|
|
}
|
|
if room != "" {
|
|
c.hub.LeaveRoom(c, room)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *Client) writePump() {
|
|
ticker := time.NewTicker(30 * time.Second)
|
|
defer func() {
|
|
ticker.Stop()
|
|
_ = c.conn.Close()
|
|
}()
|
|
|
|
for {
|
|
select {
|
|
case message, ok := <-c.send:
|
|
_ = c.conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
|
|
if !ok {
|
|
_ = c.conn.WriteMessage(websocket.CloseMessage, []byte{})
|
|
return
|
|
}
|
|
if err := c.conn.WriteMessage(websocket.TextMessage, message); err != nil {
|
|
return
|
|
}
|
|
case <-ticker.C:
|
|
_ = c.conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
|
|
if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|