gronod
7bed99cc4c
ServeHealth bind failures (common on HAOS when OTBR owns 8080) are logged and ignored. Lookup, firmware, and XMPP stay up. Log each successful listen address so add-on logs show the sockets.
108 lines
2.4 KiB
Go
108 lines
2.4 KiB
Go
package httpx
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import (
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"context"
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"encoding/json"
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"fmt"
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"log/slog"
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"net"
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"net/http"
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"time"
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"git.i3omb.com/gronod/ha-n95-local-control/internal/config"
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)
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// ServeLookup runs the POST /lookup.do listener until ctx is cancelled.
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func ServeLookup(ctx context.Context, cfg config.Config) error {
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mux := http.NewServeMux()
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mux.HandleFunc("/lookup.do", newLookupHandler(cfg))
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addr := net.JoinHostPort(cfg.BindAddress, fmt.Sprintf("%d", cfg.PortLookup))
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ln, err := net.Listen("tcp", addr)
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if err != nil {
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return fmt.Errorf("%s: %w", addr, err)
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}
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slog.Info("lookup listening", "addr", addr)
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srv := &http.Server{
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Handler: mux,
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ReadHeaderTimeout: 5 * time.Second,
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ReadTimeout: 10 * time.Second,
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WriteTimeout: 10 * time.Second,
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}
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srv.SetKeepAlivesEnabled(false)
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errCh := make(chan error, 1)
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go func() {
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errCh <- srv.Serve(ln)
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}()
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select {
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case <-ctx.Done():
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shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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_ = srv.Shutdown(shutdownCtx)
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return nil
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case err := <-errCh:
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return err
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}
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}
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func newLookupHandler(cfg config.Config) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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w.Header().Set("Connection", "close")
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r.Body = http.MaxBytesReader(w, r.Body, 64*1024)
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defer r.Body.Close()
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var req lookupRequest
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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slog.Debug("lookup request decode failed", "err", err)
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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if req.Todo != "FindBest" {
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writeLookupFail(w)
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return
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}
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var port int
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switch req.Service {
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case "EcoMsgNew":
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port = cfg.PortXMPP
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case "EcoUpdate":
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port = cfg.PortFirmware
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default:
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writeLookupFail(w)
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return
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}
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resp := lookupResponse{Result: "ok", IP: cfg.AdvertiseIP.String(), Port: port}
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w.WriteHeader(http.StatusOK)
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data, _ := json.Marshal(resp)
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_, _ = w.Write(data)
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}
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}
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type lookupRequest struct {
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Service string `json:"service"`
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Todo string `json:"todo"`
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}
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type lookupResponse struct {
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Result string `json:"result"`
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IP string `json:"ip"`
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Port int `json:"port"`
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}
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func writeLookupFail(w http.ResponseWriter) {
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w.WriteHeader(http.StatusOK)
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_, _ = w.Write([]byte(`{"result":"fail"}`))
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}
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