47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package broker
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import (
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"context"
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"net"
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"net/http"
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"time"
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"git.asio.asia/nixevol/NixMsg/internal/httpx"
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"git.asio.asia/nixevol/NixMsg/internal/listener"
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"github.com/coder/websocket"
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)
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// WSHandler 返回 /mqtt 的 WebSocket 升级处理。
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// Accept 时 InsecureSkipVerify=true；之后检查 Subprotocol==mqtt。
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// NetConn 使用 Background 派生的 context，不用请求 Context。
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func (b *Broker) WSHandler(proxies *listener.ProxySet) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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c, err := websocket.Accept(w, r, &websocket.AcceptOptions{
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Subprotocols: []string{"mqtt"},
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InsecureSkipVerify: true,
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})
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if err != nil {
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return
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}
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if c.Subprotocol() != "mqtt" {
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_ = c.Close(websocket.StatusPolicyViolation, "subprotocol must be mqtt")
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return
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}
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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nc := websocket.NetConn(ctx, c, websocket.MessageBinary)
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var nets []*net.IPNet
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if proxies != nil {
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nets = proxies.IPNets()
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}
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ip := httpx.ClientIP(r, nets)
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if parsed := net.ParseIP(ip); parsed != nil {
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nc = listener.WithRemoteAddr(nc, &net.TCPAddr{IP: parsed})
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}
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_ = nc.SetReadDeadline(time.Now().Add(10 * time.Second))
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_ = b.AttachWS(nc)
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})
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}
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