jbergner
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548 lines
14 KiB
Go
548 lines
14 KiB
Go
package main
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import (
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"context"
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"fmt"
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"html/template"
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"log"
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"mime"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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"sync"
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"time"
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"github.com/go-chi/chi/v5"
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"github.com/go-chi/httprate"
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"github.com/goccy/go-json"
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"git.send.nrw/sendnrw/nginx-stream-server/internal/mtx"
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)
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var (
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listen = env("LISTEN", ":8080")
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mtxAPI = env("MTX_API", "http://127.0.0.1:9997")
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mtxHLS = env("MTX_HLS", "http://127.0.0.1:8888")
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streamsCSV = os.Getenv("STREAMS")
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basicUser = os.Getenv("BASIC_AUTH_USER")
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basicPass = os.Getenv("BASIC_AUTH_PASS")
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// Root für Webassets (per ENV überschreibbar)
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webRoot = env("WEB_ROOT", "web")
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// Templates werden beim Start geladen
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tpls *template.Template
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)
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// ----- SSE Broker -----
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type sseClient chan []byte
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type sseBroker struct {
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mu sync.Mutex
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clients map[sseClient]struct{}
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}
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func newSSEBroker() *sseBroker {
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return &sseBroker{clients: make(map[sseClient]struct{})}
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}
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func (b *sseBroker) add(c sseClient) {
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b.mu.Lock()
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b.clients[c] = struct{}{}
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b.mu.Unlock()
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}
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func (b *sseBroker) del(c sseClient) {
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b.mu.Lock()
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delete(b.clients, c)
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b.mu.Unlock()
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}
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func (b *sseBroker) broadcast(msg []byte) {
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b.mu.Lock()
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for c := range b.clients {
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select {
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case c <- msg:
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default: /* slow client, drop */
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}
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}
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b.mu.Unlock()
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}
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var (
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streamsJSONCache []byte
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streamsJSONETag string
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streamsCacheMu sync.RWMutex
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sseB = newSSEBroker()
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)
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func eq(a, b []byte) bool {
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if len(a) != len(b) {
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return false
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}
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for i := range a {
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if a[i] != b[i] {
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return false
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}
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}
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return true
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}
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type hlsMuxersListResp struct {
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Items []struct {
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Name string `json:"name"`
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Clients []interface{} `json:"clients"` // echte HLS-Viewer (HTTP-Clients)
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} `json:"items"`
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// manche Builds liefern "items" flach; das fangen wir ab:
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Name string `json:"name"`
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Clients []interface{} `json:"clients"`
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}
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func fetchHLSClientMap(ctx context.Context, base, user, pass string) (map[string]int, error) {
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u := strings.TrimRight(base, "/") + "/v3/hlsmuxers/list"
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
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if err != nil {
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return nil, err
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}
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if user != "" || pass != "" {
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req.SetBasicAuth(user, pass)
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}
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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// Wenn noch kein einziger HLS-Client existiert, liefert MediaMTX oft 200 mit leerer Liste
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// (oder 200 mit items=[]). 404 sollte hier nicht auftreten – falls doch, behandeln wir es als "leer".
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if resp.StatusCode == http.StatusNotFound {
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return map[string]int{}, nil
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("hlsmuxers/list: %s", resp.Status)
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}
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var out hlsMuxersListResp
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if err := json.NewDecoder(resp.Body).Decode(&out); err != nil {
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return nil, err
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}
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m := make(map[string]int)
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if len(out.Items) > 0 {
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for _, it := range out.Items {
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m[it.Name] = len(it.Clients)
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}
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return m, nil
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}
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// Fallback: flache Struktur (ein einzelner Muxer)
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if out.Name != "" {
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m[out.Name] = len(out.Clients)
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}
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return m, nil
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}
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type mtxHLSPayload struct {
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// v1.15.0 liefert einen Muxer mit Clients-Liste (Feldname kann "clients" heißen)
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Item struct {
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Name string `json:"name"`
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Clients []interface{} `json:"clients"` // Anzahl = echte HLS-Zuschauer
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} `json:"item"`
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// manche Builds liefern flach:
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Name string `json:"name"`
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Clients []interface{} `json:"clients"`
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}
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func hlsViewers(ctx context.Context, base, user, pass, name string) (int, error) {
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u := strings.TrimRight(base, "/") + "/v3/hlsmuxers/get/" + url.PathEscape(name)
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req, _ := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
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if user != "" || pass != "" {
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req.SetBasicAuth(user, pass)
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}
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res, err := http.DefaultClient.Do(req)
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if err != nil {
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return 0, err
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}
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defer res.Body.Close()
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if res.StatusCode != http.StatusOK {
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return 0, fmt.Errorf("hlsmuxers/get %s: %s", name, res.Status)
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}
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var out mtxHLSPayload
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if err := json.NewDecoder(res.Body).Decode(&out); err != nil {
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return 0, err
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}
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if out.Item.Clients != nil {
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return len(out.Item.Clients), nil
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}
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return len(out.Clients), nil
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}
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func init() {
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_ = mime.AddExtensionType(".css", "text/css")
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_ = mime.AddExtensionType(".js", "application/javascript")
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_ = mime.AddExtensionType(".mjs", "application/javascript")
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_ = mime.AddExtensionType(".woff2", "font/woff2")
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_ = mime.AddExtensionType(".woff", "font/woff")
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}
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func env(k, def string) string {
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if v := os.Getenv(k); v != "" {
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return v
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}
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return def
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}
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func mustLoadTemplates() *template.Template {
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pattern := filepath.Join(webRoot, "templates", "*.html")
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t, err := template.ParseGlob(pattern)
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if err != nil {
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log.Fatalf("templates laden fehlgeschlagen (%s): %v", pattern, err)
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}
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return t
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}
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func main() {
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log.SetFlags(log.LstdFlags | log.Lshortfile)
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tpls = mustLoadTemplates()
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r := chi.NewRouter()
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// Strenge CSP (alles lokal)
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r.Use(func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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w.Header().Set("Content-Security-Policy",
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strings.Join([]string{
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"default-src 'self'",
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"img-src 'self' data:",
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"style-src 'self'",
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"font-src 'self'",
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"script-src 'self'",
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"connect-src 'self'",
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"media-src 'self' blob:", // <— HIER blob: zulassen
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"worker-src 'self' blob:",
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}, "; "),
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)
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w.Header().Set("X-Content-Type-Options", "nosniff")
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w.Header().Set("X-Frame-Options", "SAMEORIGIN")
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w.Header().Set("Referrer-Policy", "no-referrer")
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next.ServeHTTP(w, req)
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})
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})
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// Rate Limit nur auf REST, nicht auf SSE:
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r.Group(func(r chi.Router) {
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r.Use(httprate.LimitByIP(240, time.Minute)) // fertig
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r.Get("/api/streams", apiStreams)
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})
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// SSE ohne Rate-Limit (1 Verbindung pro Browser):
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r.Get("/api/streams/events", sseHandler)
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// Optional Basic Auth für Seiten
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if basicUser != "" {
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creds := basicUser + ":" + basicPass
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r.Group(func(p chi.Router) {
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p.Use(func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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a := strings.SplitN(r.Header.Get("Authorization"), " ", 2)
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if len(a) == 2 && a[0] == "Basic" && a[1] == basic(creds) {
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next.ServeHTTP(w, r)
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return
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}
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w.Header().Set("WWW-Authenticate", "Basic realm=Restricted")
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http.Error(w, "auth required", http.StatusUnauthorized)
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})
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})
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p.Get("/", pageIndex)
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p.Get("/{name}", pageStream)
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})
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} else {
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r.Get("/", pageIndex)
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r.Get("/{name}", pageStream)
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}
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// /static → echtes Dateisystem
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staticDir := http.Dir(filepath.Join(webRoot, "static"))
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r.Handle("/static/*",
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http.StripPrefix("/static",
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http.FileServer(staticDir),
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),
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)
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// HLS-Reverse-Proxy
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up, _ := url.Parse(mtxHLS)
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proxy := httputil.NewSingleHostReverseProxy(up)
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proxy.ErrorHandler = func(w http.ResponseWriter, r *http.Request, e error) {
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http.Error(w, "upstream error", http.StatusBadGateway)
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}
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r.Handle("/hls/*", http.StripPrefix("/hls", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if strings.Contains(r.URL.Path, "..") {
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http.NotFound(w, r)
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return
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}
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proxy.ServeHTTP(w, r)
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})))
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// Health
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r.Get("/health", func(w http.ResponseWriter, r *http.Request) { w.Write([]byte("ok")) })
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go func() {
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t := time.NewTicker(1 * time.Second)
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defer t.Stop()
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for range t.C {
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// gleiche Logik wie in apiStreams, nur ohne Response
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ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
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c := &mtx.Client{BaseURL: mtxAPI, User: os.Getenv("MTX_API_USER"), Pass: os.Getenv("MTX_API_PASS")}
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pl, err := c.Paths(ctx)
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cancel()
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if err != nil {
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// optional: bei Fehler nichts senden
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continue
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}
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allowed := map[string]bool{}
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if streamsCSV != "" {
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for _, s := range strings.Split(streamsCSV, ",") {
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allowed[strings.TrimSpace(s)] = true
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}
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}
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type item struct {
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Name string `json:"name"`
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Live bool `json:"live"`
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Viewers int `json:"viewers"`
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}
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out := struct {
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Items []item `json:"items"`
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}{}
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for _, p := range pl.Items {
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if len(allowed) > 0 && !allowed[p.Name] {
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continue
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}
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// echte HLS-Viewerzahlen einmalig holen (Batch)
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hlsMap := map[string]int{}
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{
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ctxH, cancelH := context.WithTimeout(context.Background(), 2*time.Second)
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tmp, err := fetchHLSClientMap(ctxH, mtxAPI, os.Getenv("MTX_API_USER"), os.Getenv("MTX_API_PASS"))
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cancelH()
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if err == nil && tmp != nil {
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hlsMap = tmp
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} else {
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log.Printf("warn:a: hlsmuxers/list: %v", err)
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}
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}
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viewers := 0
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// 1) Echte HLS-Zuschauer aus der Batch-Map
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if v, ok := hlsMap[p.Name]; ok {
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viewers = v
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}
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// 2) Fallback: Nicht-HLS-Reader (oder wenn Map leer ist)
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// Bei HLS ist p.Viewers() meist 1 (der Muxer), aber das wollen wir nur nutzen,
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// wenn wir keinen HLS-Wert haben.
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if viewers == 0 {
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if v := p.Viewers(); v > 0 {
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viewers = v
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}
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}
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out.Items = append(out.Items, item{
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Name: p.Name,
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Live: p.Live(),
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Viewers: viewers,
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})
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}
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buf, _ := json.Marshal(out)
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streamsCacheMu.RLock()
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same := eq(buf, streamsJSONCache)
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streamsCacheMu.RUnlock()
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if same {
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continue
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}
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streamsCacheMu.Lock()
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streamsJSONCache = buf
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streamsJSONETag = fmt.Sprintf("%x", len(buf))
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streamsCacheMu.Unlock()
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// an alle SSE-Clients senden
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sseB.broadcast(buf)
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}
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}()
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log.Printf("Dashboard listening on %s (API=%s HLS=%s, WEB_ROOT=%s)\n", listen, mtxAPI, mtxHLS, webRoot)
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if err := http.ListenAndServe(listen, r); err != nil {
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log.Fatal(err)
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}
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}
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func sseHandler(w http.ResponseWriter, r *http.Request) {
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// SSE-Header
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w.Header().Set("Content-Type", "text/event-stream")
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w.Header().Set("Cache-Control", "no-cache")
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w.Header().Set("Connection", "keep-alive")
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// CORS brauchst du nicht, gleiche Origin
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// Flush unterstützen
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flusher, ok := w.(http.Flusher)
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if !ok {
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http.Error(w, "stream unsupported", http.StatusInternalServerError)
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return
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}
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// Client-Kanal registrieren
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ch := make(sseClient, 8)
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sseB.add(ch)
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defer sseB.del(ch)
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// Beim Connect sofort den aktuellen Snapshot schicken (falls vorhanden)
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streamsCacheMu.RLock()
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snap := streamsJSONCache
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streamsCacheMu.RUnlock()
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if len(snap) > 0 {
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fmt.Fprintf(w, "event: update\ndata: %s\n\n", string(snap))
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flusher.Flush()
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}
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// Heartbeat (hält Proxies freundlich)
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hb := time.NewTicker(15 * time.Second)
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defer hb.Stop()
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// Abbruch, wenn Client trennt
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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 := <-ch:
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// JSON als "update" senden
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fmt.Fprintf(w, "event: update\ndata: %s\n\n", string(msg))
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flusher.Flush()
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case <-hb.C:
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// Kommentar als Ping
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fmt.Fprintf(w, ": ping\n\n")
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flusher.Flush()
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}
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}
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}
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func apiStreams(w http.ResponseWriter, r *http.Request) {
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ctx, cancel := context.WithTimeout(r.Context(), 3*time.Second)
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defer cancel()
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c := &mtx.Client{BaseURL: mtxAPI, User: os.Getenv("MTX_API_USER"), Pass: os.Getenv("MTX_API_PASS")}
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pl, err := c.Paths(ctx)
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if err != nil {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusBadGateway)
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_ = json.NewEncoder(w).Encode(map[string]any{"error": err.Error()})
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return
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}
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allowed := map[string]bool{}
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if streamsCSV != "" {
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for _, s := range strings.Split(streamsCSV, ",") {
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allowed[strings.TrimSpace(s)] = true
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}
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}
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type item struct {
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Name string `json:"name"`
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Live bool `json:"live"`
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Viewers int `json:"viewers"`
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}
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out := struct {
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Items []item `json:"items"`
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}{}
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for _, p := range pl.Items {
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if len(allowed) > 0 && !allowed[p.Name] {
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continue
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}
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// echte HLS-Viewerzahlen einmalig holen (Batch)
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hlsMap := map[string]int{}
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{
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ctxH, cancelH := context.WithTimeout(context.Background(), 2*time.Second)
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tmp, err := fetchHLSClientMap(ctxH, mtxAPI, os.Getenv("MTX_API_USER"), os.Getenv("MTX_API_PASS"))
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cancelH()
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if err == nil && tmp != nil {
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hlsMap = tmp
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} else {
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log.Printf("warn:b: hlsmuxers/list: %v", err)
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}
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}
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viewers := 0
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// 1) Echte HLS-Zuschauer aus der Batch-Map
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if v, ok := hlsMap[p.Name]; ok {
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viewers = v
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}
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// 2) Fallback: Nicht-HLS-Reader (oder wenn Map leer ist)
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// Bei HLS ist p.Viewers() meist 1 (der Muxer), aber das wollen wir nur nutzen,
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// wenn wir keinen HLS-Wert haben.
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if viewers == 0 {
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if v := p.Viewers(); v > 0 {
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viewers = v
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}
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}
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out.Items = append(out.Items, item{
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Name: p.Name,
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Live: p.Live(),
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Viewers: viewers,
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})
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}
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w.Header().Set("Content-Type", "application/json")
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_ = json.NewEncoder(w).Encode(out)
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}
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func pageIndex(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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if err := tpls.ExecuteTemplate(w, "index.html", nil); err != nil {
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http.Error(w, err.Error(), 500)
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}
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}
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func pageStream(w http.ResponseWriter, r *http.Request) {
|
||
name := chi.URLParam(r, "name")
|
||
w.Header().Set("Content-Type", "text/html; charset=utf-8")
|
||
if err := tpls.ExecuteTemplate(w, "stream.html", map[string]any{
|
||
"Name": name,
|
||
"JSONName": fmt.Sprintf("%q", name),
|
||
}); err != nil {
|
||
http.Error(w, err.Error(), 500)
|
||
}
|
||
}
|
||
|
||
// Basic helper bleibt, falls du Basic Auth nutzt
|
||
func basic(creds string) string {
|
||
const tbl = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
|
||
b := []byte(creds)
|
||
var out []byte
|
||
for i := 0; i < len(b); i += 3 {
|
||
var v uint32
|
||
n := 0
|
||
for j := 0; j < 3; j++ {
|
||
v <<= 8
|
||
if i+j < len(b) {
|
||
v |= uint32(b[i+j])
|
||
n++
|
||
}
|
||
}
|
||
for j := 0; j < 4; j++ {
|
||
if j <= n {
|
||
out = append(out, tbl[(v>>(18-6*uint(j)))&0x3f])
|
||
} else {
|
||
out = append(out, '=')
|
||
}
|
||
}
|
||
}
|
||
return string(out)
|
||
}
|