mirror of
https://github.com/Mrs4s/go-cqhttp.git
synced 2025-05-04 19:17:37 +08:00
379 lines
10 KiB
Go
379 lines
10 KiB
Go
package server
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import (
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"bytes"
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"context"
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"encoding/json"
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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/MiraiGo/utils"
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log "github.com/sirupsen/logrus"
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"github.com/tidwall/gjson"
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"gopkg.in/yaml.v3"
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"nhooyr.io/websocket"
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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/modules/api"
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"github.com/Mrs4s/go-cqhttp/modules/config"
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"github.com/Mrs4s/go-cqhttp/modules/filter"
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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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mu sync.Mutex
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eventConn []*wsConn
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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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mu sync.Mutex
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universal *wsConn
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event *wsConn
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token string
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filter string
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reconnectInterval time.Duration
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limiter api.Handler
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}
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type wsConn struct {
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*websocket.Conn
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apiCaller *api.Caller
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}
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// runWSServer 运行一个正向WS server
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func runWSServer(b *coolq.CQBot, node yaml.Node) {
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var conf config.WebsocketServer
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switch err := node.Decode(&conf); {
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case err != nil:
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log.Warn("读取正向Websocket配置失败 :", err)
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fallthrough
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case conf.Disabled:
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return
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}
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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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filter.Add(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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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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// runWSClient 运行一个反向向WS client
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func runWSClient(b *coolq.CQBot, node yaml.Node) {
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var conf config.WebsocketReverse
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switch err := node.Decode(&conf); {
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case err != nil:
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log.Warn("读取反向Websocket配置失败 :", err)
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fallthrough
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case conf.Disabled:
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return
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}
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c := &websocketClient{
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bot: b,
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token: conf.AccessToken,
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filter: conf.Filter,
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}
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filter.Add(c.filter)
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if conf.ReconnectInterval != 0 {
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c.reconnectInterval = time.Duration(conf.ReconnectInterval) * time.Millisecond
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}
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if conf.RateLimit.Enabled {
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c.limiter = rateLimit(conf.RateLimit.Frequency, conf.RateLimit.Bucket)
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}
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if conf.Universal != "" {
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c.connect("Universal", conf.Universal, &c.universal)
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c.bot.OnEventPush(c.onBotPushEvent("Universal", conf.Universal, &c.universal))
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return // 连接到 Universal 后， 不再连接其他
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}
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if conf.API != "" {
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c.connect("API", conf.API, nil)
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}
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if conf.Event != "" {
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c.connect("Event", conf.Event, &c.event)
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c.bot.OnEventPush(c.onBotPushEvent("Event", conf.Event, &c.event))
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}
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}
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func (c *websocketClient) connect(typ, url string, conptr **wsConn) {
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log.Infof("开始尝试连接到反向WebSocket %s服务器: %v", typ, url)
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header := http.Header{
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"X-Client-Role": []string{typ},
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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.Dial(context.Background(), url, &websocket.DialOptions{HTTPHeader: header}) // nolint
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if err != nil {
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log.Warnf("连接到反向WebSocket %s服务器 %v 时出现错误: %v", typ, url, err)
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if c.reconnectInterval != 0 {
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time.Sleep(c.reconnectInterval)
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c.connect(typ, url, conptr)
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}
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return
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}
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switch typ {
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case "Event", "Universal":
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handshake := fmt.Sprintf(`{"meta_event_type":"lifecycle","post_type":"meta_event","self_id":%d,"sub_type":"connect","time":%d}`, c.bot.Client.Uin, time.Now().Unix())
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err = conn.Write(context.Background(), websocket.MessageText, []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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}
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log.Infof("已连接到反向WebSocket %s服务器 %v", typ, url)
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wrappedConn := &wsConn{Conn: conn, apiCaller: api.NewCaller(c.bot)}
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if c.limiter != nil {
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wrappedConn.apiCaller.Use(c.limiter)
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}
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if conptr != nil {
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*conptr = wrappedConn
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}
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if typ != "Event" {
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go c.listenAPI(typ, url, wrappedConn)
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}
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}
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func (c *websocketClient) listenAPI(typ, url string, conn *wsConn) {
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defer func() { _ = conn.Close(websocket.StatusNormalClosure, "") }()
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conn.Conn.SetReadLimit(1024 * 1024 * 128)
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for {
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buffer := global.NewBuffer()
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t, reader, err := conn.Conn.Reader(context.Background())
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if err != nil {
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log.Warnf("监听反向WS %s时出现错误: %v", typ, 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 %s时出现错误: %v", typ, err)
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break
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}
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if t == websocket.MessageText {
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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.reconnectInterval != 0 {
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time.Sleep(c.reconnectInterval)
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if typ == "API" { // Universal 不重连，避免多次重连
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go c.connect(typ, url, nil)
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}
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}
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}
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func (c *websocketClient) onBotPushEvent(typ, url string, conn **wsConn) func(e *coolq.Event) {
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return func(e *coolq.Event) {
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c.mu.Lock()
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defer c.mu.Unlock()
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flt := filter.Find(c.filter)
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if flt != nil && !flt.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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log.Debugf("向反向WS %s服务器推送Event: %s", typ, e.JSONBytes())
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ctx, cancel := context.WithTimeout(context.Background(), time.Second*15)
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defer cancel()
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if err := (*conn).Write(ctx, websocket.MessageText, e.JSONBytes()); err != nil {
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log.Warnf("向反向WS %s服务器推送 Event 时出现错误: %v", typ, err)
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_ = (*conn).Close(websocket.StatusNormalClosure, "")
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if c.reconnectInterval != 0 {
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time.Sleep(c.reconnectInterval)
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c.connect(typ, url, conn)
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}
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}
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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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opts := &websocket.AcceptOptions{InsecureSkipVerify: true}
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c, err := websocket.Accept(w, r, opts)
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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.Write(context.Background(), websocket.MessageText, []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(websocket.StatusNormalClosure, "")
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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 := &wsConn{Conn: c, apiCaller: api.NewCaller(s.bot)}
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s.mu.Lock()
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s.eventConn = append(s.eventConn, conn)
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s.mu.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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opts := &websocket.AcceptOptions{InsecureSkipVerify: true}
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c, err := websocket.Accept(w, r, opts)
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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 := &wsConn{Conn: c, apiCaller: api.NewCaller(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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opts := &websocket.AcceptOptions{InsecureSkipVerify: true}
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c, err := websocket.Accept(w, r, opts)
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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.Write(context.Background(), websocket.MessageText, []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(websocket.StatusNormalClosure, "")
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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 := &wsConn{Conn: c, apiCaller: api.NewCaller(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.mu.Lock()
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s.eventConn = append(s.eventConn, conn)
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s.mu.Unlock()
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s.listenAPI(conn)
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}
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func (s *webSocketServer) listenAPI(c *wsConn) {
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defer func() { _ = c.Close(websocket.StatusNormalClosure, "") }()
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c.Conn.SetReadLimit(1024 * 1024 * 128)
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for {
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buffer := global.NewBuffer()
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t, reader, err := c.Reader(context.Background())
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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.MessageText {
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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 *wsConn) 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(websocket.StatusInternalError, fmt.Sprint(err))
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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.Call(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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writer, _ := c.Writer(context.Background(), websocket.MessageText)
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_ = json.NewEncoder(writer).Encode(ret)
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_ = writer.Close()
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}
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func (s *webSocketServer) onBotPushEvent(e *coolq.Event) {
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flt := filter.Find(s.filter)
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if flt != nil && !flt.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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s.mu.Lock()
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defer s.mu.Unlock()
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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客户端推送Event: %s", e.JSONBytes())
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if err := conn.Write(context.Background(), websocket.MessageText, e.JSONBytes()); err != nil {
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_ = conn.Close(websocket.StatusNormalClosure, "")
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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 an in-place removal to avoid copying.
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s.eventConn[j] = conn
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}
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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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