mirror of
https://github.com/Mrs4s/go-cqhttp.git
synced 2025-05-04 19:17:37 +08:00
411 lines
12 KiB
Go
411 lines
12 KiB
Go
package server
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import (
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"bytes"
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"fmt"
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"net/http"
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"runtime/debug"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/Mrs4s/go-cqhttp/coolq"
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"github.com/Mrs4s/go-cqhttp/global"
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"github.com/Mrs4s/go-cqhttp/internal/config"
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"github.com/Mrs4s/MiraiGo/utils"
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"github.com/gorilla/websocket"
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log "github.com/sirupsen/logrus"
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"github.com/tidwall/gjson"
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)
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type webSocketServer struct {
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bot *coolq.CQBot
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conf *config.WebsocketServer
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eventConn []*webSocketConn
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eventConnMutex sync.Mutex
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token string
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handshake string
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filter string
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}
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// websocketClient WebSocket客户端实例
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type websocketClient struct {
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bot *coolq.CQBot
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conf *config.WebsocketReverse
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universalConn *webSocketConn
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eventConn *webSocketConn
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token string
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filter string
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}
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type webSocketConn struct {
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*websocket.Conn
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sync.Mutex
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apiCaller *apiCaller
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}
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var upgrader = websocket.Upgrader{
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CheckOrigin: func(r *http.Request) bool {
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return true
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},
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}
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// RunWebSocketServer 运行一个正向WS server
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func RunWebSocketServer(b *coolq.CQBot, conf *config.WebsocketServer) {
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s := &webSocketServer{
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bot: b,
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conf: conf,
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token: conf.AccessToken,
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filter: conf.Filter,
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}
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addFilter(s.filter)
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addr := fmt.Sprintf("%s:%d", conf.Host, conf.Port)
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s.handshake = fmt.Sprintf(`{"_post_method":2,"meta_event_type":"lifecycle","post_type":"meta_event","self_id":%d,"sub_type":"connect","time":%d}`,
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b.Client.Uin, time.Now().Unix())
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b.OnEventPush(s.onBotPushEvent)
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mux := http.ServeMux{}
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mux.HandleFunc("/event", s.event)
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mux.HandleFunc("/api", s.api)
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mux.HandleFunc("/", s.any)
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go func() {
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log.Infof("CQ WebSocket 服务器已启动: %v", addr)
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log.Fatal(http.ListenAndServe(addr, &mux))
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}()
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}
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// RunWebSocketClient 运行一个正向WS client
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func RunWebSocketClient(b *coolq.CQBot, conf *config.WebsocketReverse) {
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c := &websocketClient{
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bot: b,
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conf: conf,
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token: conf.AccessToken,
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filter: conf.Filter,
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}
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addFilter(c.filter)
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if c.conf.Universal != "" {
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c.connectUniversal()
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} else {
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if c.conf.API != "" {
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c.connectAPI()
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}
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if c.conf.Event != "" {
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c.connectEvent()
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}
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}
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c.bot.OnEventPush(c.onBotPushEvent)
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}
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func (c *websocketClient) connectAPI() {
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log.Infof("开始尝试连接到反向WebSocket API服务器: %v", c.conf.API)
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header := http.Header{
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"X-Client-Role": []string{"API"},
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"X-Self-ID": []string{strconv.FormatInt(c.bot.Client.Uin, 10)},
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"User-Agent": []string{"CQHttp/4.15.0"},
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}
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if c.token != "" {
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header["Authorization"] = []string{"Token " + c.token}
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}
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conn, _, err := websocket.DefaultDialer.Dial(c.conf.API, header) // nolint
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if err != nil {
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log.Warnf("连接到反向WebSocket API服务器 %v 时出现错误: %v", c.conf.API, err)
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if c.conf.ReconnectInterval != 0 {
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time.Sleep(time.Millisecond * time.Duration(c.conf.ReconnectInterval))
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c.connectAPI()
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}
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return
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}
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log.Infof("已连接到反向WebSocket API服务器 %v", c.conf.API)
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wrappedConn := &webSocketConn{Conn: conn, apiCaller: newAPICaller(c.bot)}
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if c.conf.RateLimit.Enabled {
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wrappedConn.apiCaller.use(rateLimit(c.conf.RateLimit.Frequency, c.conf.RateLimit.Bucket))
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}
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go c.listenAPI(wrappedConn, false)
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}
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func (c *websocketClient) connectEvent() {
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log.Infof("开始尝试连接到反向WebSocket Event服务器: %v", c.conf.Event)
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header := http.Header{
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"X-Client-Role": []string{"Event"},
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"X-Self-ID": []string{strconv.FormatInt(c.bot.Client.Uin, 10)},
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"User-Agent": []string{"CQHttp/4.15.0"},
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}
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if c.token != "" {
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header["Authorization"] = []string{"Token " + c.token}
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}
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conn, _, err := websocket.DefaultDialer.Dial(c.conf.Event, header) // nolint
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if err != nil {
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log.Warnf("连接到反向WebSocket Event服务器 %v 时出现错误: %v", c.conf.Event, err)
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if c.conf.ReconnectInterval != 0 {
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time.Sleep(time.Millisecond * time.Duration(c.conf.ReconnectInterval))
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c.connectEvent()
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}
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return
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}
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handshake := fmt.Sprintf(`{"meta_event_type":"lifecycle","post_type":"meta_event","self_id":%d,"sub_type":"connect","time":%d}`,
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c.bot.Client.Uin, time.Now().Unix())
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err = conn.WriteMessage(websocket.TextMessage, []byte(handshake))
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if err != nil {
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log.Warnf("反向WebSocket 握手时出现错误: %v", err)
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}
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log.Infof("已连接到反向WebSocket Event服务器 %v", c.conf.Event)
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if c.eventConn == nil {
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wrappedConn := &webSocketConn{Conn: conn, apiCaller: newAPICaller(c.bot)}
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c.eventConn = wrappedConn
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} else {
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c.eventConn.Conn = conn
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}
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}
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func (c *websocketClient) connectUniversal() {
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log.Infof("开始尝试连接到反向WebSocket Universal服务器: %v", c.conf.Universal)
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header := http.Header{
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"X-Client-Role": []string{"Universal"},
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"X-Self-ID": []string{strconv.FormatInt(c.bot.Client.Uin, 10)},
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"User-Agent": []string{"CQHttp/4.15.0"},
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}
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if c.token != "" {
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header["Authorization"] = []string{"Token " + c.token}
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}
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conn, _, err := websocket.DefaultDialer.Dial(c.conf.Universal, header) // nolint
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if err != nil {
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log.Warnf("连接到反向WebSocket Universal服务器 %v 时出现错误: %v", c.conf.Universal, err)
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if c.conf.ReconnectInterval != 0 {
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time.Sleep(time.Millisecond * time.Duration(c.conf.ReconnectInterval))
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c.connectUniversal()
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}
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return
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}
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handshake := fmt.Sprintf(`{"meta_event_type":"lifecycle","post_type":"meta_event","self_id":%d,"sub_type":"connect","time":%d}`,
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c.bot.Client.Uin, time.Now().Unix())
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err = conn.WriteMessage(websocket.TextMessage, []byte(handshake))
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if err != nil {
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log.Warnf("反向WebSocket 握手时出现错误: %v", err)
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}
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if c.universalConn == nil {
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wrappedConn := &webSocketConn{Conn: conn, apiCaller: newAPICaller(c.bot)}
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if c.conf.RateLimit.Enabled {
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wrappedConn.apiCaller.use(rateLimit(c.conf.RateLimit.Frequency, c.conf.RateLimit.Bucket))
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}
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c.universalConn = wrappedConn
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} else {
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c.universalConn.Conn = conn
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}
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go c.listenAPI(c.universalConn, true)
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}
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func (c *websocketClient) listenAPI(conn *webSocketConn, u bool) {
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defer func() { _ = conn.Close() }()
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for {
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buffer := global.NewBuffer()
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t, reader, err := conn.NextReader()
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if err != nil {
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log.Warnf("监听反向WS API时出现错误: %v", err)
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break
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}
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_, err = buffer.ReadFrom(reader)
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if err != nil {
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log.Warnf("监听反向WS API时出现错误: %v", err)
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break
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}
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if t == websocket.TextMessage {
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go func(buffer *bytes.Buffer) {
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defer global.PutBuffer(buffer)
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conn.handleRequest(c.bot, buffer.Bytes())
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}(buffer)
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} else {
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global.PutBuffer(buffer)
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}
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}
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if c.conf.ReconnectInterval != 0 {
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time.Sleep(time.Millisecond * time.Duration(c.conf.ReconnectInterval))
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if !u {
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go c.connectAPI()
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}
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}
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}
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func (c *websocketClient) onBotPushEvent(e *coolq.Event) {
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filter := findFilter(c.filter)
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if filter != nil && !filter.Eval(gjson.Parse(e.JSONString())) {
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log.Debugf("上报Event %s 到 WS服务器 时被过滤.", e.JSONBytes())
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return
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}
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push := func(conn *webSocketConn, reconnect func()) {
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log.Debugf("向WS服务器 %v 推送Event: %s", conn.RemoteAddr().String(), e.JSONBytes())
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conn.Lock()
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defer conn.Unlock()
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_ = conn.SetWriteDeadline(time.Now().Add(time.Second * 15))
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if err := conn.WriteMessage(websocket.TextMessage, e.JSONBytes()); err != nil {
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log.Warnf("向WS服务器 %v 推送Event时出现错误: %v", conn.RemoteAddr().String(), err)
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_ = conn.Close()
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if c.conf.ReconnectInterval != 0 {
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time.Sleep(time.Millisecond * time.Duration(c.conf.ReconnectInterval))
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reconnect()
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}
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}
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}
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if c.eventConn != nil {
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push(c.eventConn, c.connectEvent)
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}
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if c.universalConn != nil {
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push(c.universalConn, c.connectUniversal)
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}
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}
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func (s *webSocketServer) event(w http.ResponseWriter, r *http.Request) {
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status := checkAuth(r, s.token)
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if status != http.StatusOK {
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log.Warnf("已拒绝 %v 的 WebSocket 请求: Token鉴权失败(code:%d)", r.RemoteAddr, status)
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w.WriteHeader(status)
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return
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}
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Warnf("处理 WebSocket 请求时出现错误: %v", err)
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return
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}
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err = c.WriteMessage(websocket.TextMessage, []byte(s.handshake))
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if err != nil {
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log.Warnf("WebSocket 握手时出现错误: %v", err)
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_ = c.Close()
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return
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}
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log.Infof("接受 WebSocket 连接: %v (/event)", r.RemoteAddr)
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conn := &webSocketConn{Conn: c, apiCaller: newAPICaller(s.bot)}
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s.eventConnMutex.Lock()
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s.eventConn = append(s.eventConn, conn)
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s.eventConnMutex.Unlock()
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}
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func (s *webSocketServer) api(w http.ResponseWriter, r *http.Request) {
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status := checkAuth(r, s.token)
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if status != http.StatusOK {
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log.Warnf("已拒绝 %v 的 WebSocket 请求: Token鉴权失败(code:%d)", r.RemoteAddr, status)
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w.WriteHeader(status)
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return
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}
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Warnf("处理 WebSocket 请求时出现错误: %v", err)
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return
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}
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log.Infof("接受 WebSocket 连接: %v (/api)", r.RemoteAddr)
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conn := &webSocketConn{Conn: c, apiCaller: newAPICaller(s.bot)}
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if s.conf.RateLimit.Enabled {
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conn.apiCaller.use(rateLimit(s.conf.RateLimit.Frequency, s.conf.RateLimit.Bucket))
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}
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go s.listenAPI(conn)
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}
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func (s *webSocketServer) any(w http.ResponseWriter, r *http.Request) {
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status := checkAuth(r, s.token)
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if status != http.StatusOK {
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log.Warnf("已拒绝 %v 的 WebSocket 请求: Token鉴权失败(code:%d)", r.RemoteAddr, status)
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w.WriteHeader(status)
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return
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}
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c, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Warnf("处理 WebSocket 请求时出现错误: %v", err)
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return
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}
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err = c.WriteMessage(websocket.TextMessage, []byte(s.handshake))
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if err != nil {
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log.Warnf("WebSocket 握手时出现错误: %v", err)
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_ = c.Close()
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return
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}
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log.Infof("接受 WebSocket 连接: %v (/)", r.RemoteAddr)
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conn := &webSocketConn{Conn: c, apiCaller: newAPICaller(s.bot)}
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if s.conf.RateLimit.Enabled {
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conn.apiCaller.use(rateLimit(s.conf.RateLimit.Frequency, s.conf.RateLimit.Bucket))
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}
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s.eventConnMutex.Lock()
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s.eventConn = append(s.eventConn, conn)
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s.eventConnMutex.Unlock()
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s.listenAPI(conn)
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}
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func (s *webSocketServer) listenAPI(c *webSocketConn) {
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defer func() { _ = c.Close() }()
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for {
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buffer := global.NewBuffer()
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t, reader, err := c.NextReader()
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if err != nil {
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break
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}
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_, err = buffer.ReadFrom(reader)
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if err != nil {
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break
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}
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if t == websocket.TextMessage {
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go func(buffer *bytes.Buffer) {
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defer global.PutBuffer(buffer)
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c.handleRequest(s.bot, buffer.Bytes())
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}(buffer)
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} else {
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global.PutBuffer(buffer)
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}
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}
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}
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func (c *webSocketConn) handleRequest(_ *coolq.CQBot, payload []byte) {
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defer func() {
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if err := recover(); err != nil {
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log.Printf("处置WS命令时发生无法恢复的异常：%v\n%s", err, debug.Stack())
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_ = c.Close()
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}
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}()
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j := gjson.Parse(utils.B2S(payload))
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t := strings.TrimSuffix(j.Get("action").Str, "_async")
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log.Debugf("WS接收到API调用: %v 参数: %v", t, j.Get("params").Raw)
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ret := c.apiCaller.callAPI(t, j.Get("params"))
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if j.Get("echo").Exists() {
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ret["echo"] = j.Get("echo").Value()
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}
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c.Lock()
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defer c.Unlock()
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_ = c.WriteJSON(ret)
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}
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func (s *webSocketServer) onBotPushEvent(e *coolq.Event) {
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s.eventConnMutex.Lock()
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defer s.eventConnMutex.Unlock()
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filter := findFilter(s.filter)
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if filter != nil && !filter.Eval(gjson.Parse(e.JSONString())) {
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log.Debugf("上报Event %s 到 WS客户端 时被过滤.", e.JSONBytes())
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return
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}
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j := 0
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for i := 0; i < len(s.eventConn); i++ {
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conn := s.eventConn[i]
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log.Debugf("向WS客户端 %v 推送Event: %s", conn.RemoteAddr().String(), e.JSONBytes())
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conn.Lock()
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if err := conn.WriteMessage(websocket.TextMessage, e.JSONBytes()); err != nil {
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_ = conn.Close()
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conn = nil
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continue
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}
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if i != j {
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// i != j means that some connection has been closed.
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// use a in-place removal to avoid copying.
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s.eventConn[j] = conn
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}
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conn.Unlock()
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j++
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}
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s.eventConn = s.eventConn[:j]
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}
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