fix: preserve authenticated HLS session redirects

VERSION

@@ -1 +1 @@
-0.1.2
+0.1.3

app.py

@@ -595,7 +595,18 @@ class Handler(BaseHTTPRequestHandler):
             r = conn.getresponse()
             if r.status >= 400:
                 raise Problem('暂时没有可播放画面，请确认设备网络、账号、码流路径和录像时间', 503)
+            location = None
+            if 300 <= r.status < 400:
+                # MediaMTX starts an HLS session with a relative redirect. The
+                # browser must keep that session query on subsequent playlists.
+                target = url.urlsplit(url.urljoin(path, r.getheader('Location', '')))
+                if (port != HLS_PORT or target.scheme or target.netloc
+                        or not re.fullmatch(r'/cam_[a-f0-9]{16}_(main|sub)/[a-zA-Z0-9_.-]+', target.path)):
+                    raise Problem('视频服务返回了无效的播放跳转', 502)
+                location = '/media/live' + target.path + ('?' + target.query if target.query else '')
             self.send_response(r.status)
+            if location:
+                self.send_header('Location', location)
             for k in ('Content-Type', 'Content-Length', 'Content-Range', 'Accept-Ranges'):
                 if r.getheader(k):
                     self.send_header(k, r.getheader(k))

web/app.js

@@ -65,7 +65,12 @@ function renderLive() {
     video.onerror=()=>error('浏览器无法解码此码流。可尝试切换清晰度，或将摄像头设为 H.264。');
     if (window.Hls?.isSupported()) {
       const hls = new Hls({maxBufferLength:10,backBufferLength:5,liveSyncDurationCount:3,manifestLoadingMaxRetry:2,levelLoadingMaxRetry:2});
-      hls.on(Hls.Events.ERROR,(_,data)=>{if(data.fatal){error('画面暂未接通，请检查设备账号、路径、网络或编码。点击刷新状态可重试。');hls.destroy();}});
+      hls.on(Hls.Events.ERROR,(_,data)=>{if(data.fatal){
+        const codecError = /codec|bufferAddCodec|manifestIncompatible/i.test(data.details || '');
+        error(codecError ? '浏览器不支持当前视频编码，需要服务器提供兼容码流。' : '画面加载失败（'+(data.details || data.type)+'）。点击刷新状态可重试。');
+        console.warn('Video playback failed', c.id, data.type, data.details);
+        hls.destroy();
+      }});
       hls.on(Hls.Events.MANIFEST_PARSED,()=>video.play().catch(()=>{}));
       hls.loadSource(src);hls.attachMedia(video);players.push(hls);
     } else if (video.canPlayType('application/vnd.apple.mpegurl')) {video.src=src;video.play().catch(()=>{});}