549 lines
19 KiB
Go
549 lines
19 KiB
Go
package app
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import (
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"context"
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"encoding/json"
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"errors"
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"io"
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"math"
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"mime"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"time"
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)
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const playbackIdleTimeout = 10 * time.Minute
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const playbackMIME = `video/mp4; codecs="avc1.42C01F, mp4a.40.2"`
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type playbackSession struct {
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accountID string
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dramaID string
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id string
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viewer *viewerRecords
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tasks []Task
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downloadIDs []string
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prepared map[int]bool
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expires time.Time
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timer *time.Timer
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cancel context.CancelFunc
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run uint64
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state string
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error string
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duration float64
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currentIndex int
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prefetchVersion uint64
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prefetch *playbackPrefetch
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native *playbackNative
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media *playbackMediaSession
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mediaReady chan struct{}
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mediaError error
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mediaWaiters int
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emby bool
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embyLegacy bool
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embyProcessing string
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quality int
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streamVersion uint64
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openedAt time.Time
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historySequence uint64
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historyRuns map[uint64]playbackHistoryRun
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}
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type playbackEpisode struct {
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Merged bool `json:"merged,omitempty"`
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VIP bool `json:"vip,omitempty"`
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Index int `json:"index"`
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Episode string `json:"episode"`
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Title string `json:"title"`
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TaskID string `json:"taskId,omitempty"`
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Danmaku bool `json:"danmaku,omitempty"`
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ChapterID string `json:"chapterId,omitempty"`
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Number int `json:"number"`
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Total int `json:"total"`
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}
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type playbackView struct {
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State string `json:"state"`
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Error string `json:"error,omitempty"`
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Run uint64 `json:"run"`
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Duration float64 `json:"duration"`
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Prefetch *playbackPrefetchView `json:"prefetch,omitempty"`
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Plan *playbackMediaPlan `json:"plan,omitempty"`
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MediaBytes int64 `json:"mediaBytes,omitempty"`
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MediaFailure bool `json:"mediaFailure,omitempty"`
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}
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func (app *UIApp) registerPlaybackRoutes(mux *http.ServeMux) {
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mux.HandleFunc("/api/ui/admin/playback", app.handlePlaybackSettings)
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mux.HandleFunc("/api/ui/playback/plan", app.handlePlaybackPlan)
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mux.HandleFunc("/api/ui/playback/media/", app.handlePlaybackMediaAsset)
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mux.HandleFunc("/api/emby/media/", app.handleEmbyMediaAsset)
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mux.HandleFunc("/api/ui/playback/open", app.handlePlaybackOpen)
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mux.HandleFunc("/api/ui/playback/prepare", app.handlePlaybackPrepare)
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mux.HandleFunc("/api/ui/playback/stream", app.handlePlaybackStream)
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mux.HandleFunc("/api/ui/playback/hls/open", app.handlePlaybackNativeOpen)
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mux.HandleFunc("/api/ui/playback/hls/index.m3u8", app.handlePlaybackNativeAsset)
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mux.HandleFunc("/api/ui/playback/hls/segment.ts", app.handlePlaybackNativeAsset)
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mux.HandleFunc("/api/ui/playback/control", app.handlePlaybackControl)
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mux.HandleFunc("/api/ui/playback/status", app.handlePlaybackStatus)
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mux.HandleFunc("/api/ui/playback/prefetch", app.handlePlaybackPrefetch)
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mux.HandleFunc("/api/ui/playback/danmaku", app.handlePlaybackDanmaku)
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mux.HandleFunc("/api/ui/playback/history", app.handlePlaybackHistory)
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mux.HandleFunc("/api/ui/playback/history/remove", app.handlePlaybackHistoryRemove)
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mux.HandleFunc("/api/ui/playback/progress", app.handlePlaybackProgress)
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}
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// recordPlaybackAssetDenial 记录媒体资产请求被拒的情况，便于诊断
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// iOS/WebKit 原生媒体管线的拉流失败（区分会话失效与观看者不匹配）。
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func (app *UIApp) recordPlaybackAssetDenial(request *http.Request, reason string) {
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agent := request.UserAgent()
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if len(agent) > 120 {
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agent = agent[:120]
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}
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app.downloader.recordDiagnostic(diagnosticEvent{Level: "warn", Event: "playback.asset.denied",
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HTTPStatus: http.StatusGone, Message: reason + " ua=" + agent})
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}
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func playbackRequestAllowed(writer http.ResponseWriter, request *http.Request, method string) bool {
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writer.Header().Set("Cache-Control", "private, no-store, no-transform")
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writer.Header().Set("X-Accel-Buffering", "no")
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writer.Header().Set("Cross-Origin-Resource-Policy", "same-origin")
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writer.Header().Set("X-Content-Type-Options", "nosniff")
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if request.Method != method {
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writer.Header().Set("Allow", method)
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writeJSON(writer, http.StatusMethodNotAllowed, map[string]string{"error": "请求方法不支持"})
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return false
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}
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switch request.Header.Get("Sec-Fetch-Site") {
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case "same-origin", "none":
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return true
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case "":
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default:
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writeJSON(writer, http.StatusForbidden, map[string]string{"error": "请从剧库页面发起播放"})
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return false
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}
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if origin := request.Header.Get("Origin"); origin != "" {
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parsed, err := url.Parse(origin)
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if err != nil || parsed.User != nil || parsed.Scheme != "http" && parsed.Scheme != "https" || !originHostMatches(parsed, request.Host) {
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writeJSON(writer, http.StatusForbidden, map[string]string{"error": "不允许跨站播放请求"})
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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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func originHostMatches(origin *url.URL, host string) bool {
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port := ":80"
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if origin.Scheme == "https" {
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port = ":443"
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}
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return strings.EqualFold(strings.TrimSuffix(origin.Host, port), strings.TrimSuffix(host, port))
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}
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func readPlaybackRequest(writer http.ResponseWriter, request *http.Request, destination any) bool {
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if !playbackRequestAllowed(writer, request, http.MethodPost) {
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return false
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}
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contentType, _, _ := mime.ParseMediaType(request.Header.Get("Content-Type"))
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if contentType != "application/json" {
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writeJSON(writer, http.StatusUnsupportedMediaType, map[string]string{"error": "请求必须使用 JSON"})
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return false
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}
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decoder := json.NewDecoder(http.MaxBytesReader(writer, request.Body, 4096))
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decoder.DisallowUnknownFields()
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if err := decoder.Decode(destination); err != nil {
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writeJSON(writer, http.StatusBadRequest, map[string]string{"error": "播放请求无效"})
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return false
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}
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if err := decoder.Decode(new(any)); err != io.EOF {
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writeJSON(writer, http.StatusBadRequest, map[string]string{"error": "播放请求包含多余数据"})
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return false
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}
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return true
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}
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func (app *UIApp) handlePlaybackOpen(writer http.ResponseWriter, request *http.Request) {
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var input struct {
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DramaID string `json:"dramaId"`
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TaskID string `json:"taskId"`
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Resume bool `json:"resume"`
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FromHistory bool `json:"fromHistory"`
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}
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if !readPlaybackRequest(writer, request, &input) {
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return
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}
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if input.TaskID != "" && !requireDownload(writer, request) {
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return
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}
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if input.TaskID != "" && input.DramaID != "" {
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writeJSON(writer, http.StatusBadRequest, map[string]string{"error": "请选择剧库播放或合集播放"})
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return
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}
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viewer := requestViewer(writer, request)
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if viewer == nil {
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return
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}
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if input.DramaID != "" && !app.requireDramaSources(writer, request, []string{input.DramaID}) {
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return
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}
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openedAt := time.Now()
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history := viewer.playbackHistory()
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previous, hasPrevious := history.get(input.DramaID)
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if input.FromHistory && (!input.Resume || !hasPrevious || input.TaskID != "") {
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writeJSON(writer, http.StatusNotFound, map[string]string{"error": "此观看记录已移除，请从剧库重新选择"})
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return
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}
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var drama Drama
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var title string
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var tasks []Task
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var downloadIDs []string
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initialIndex := 1
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var collectionErr error
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app.mu.Lock()
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if input.FromHistory && previous.Mode == "collection" && downloadAllowed(request.Context()) {
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if strings.HasPrefix(previous.TaskID, mergedPlaybackPrefix) && previous.TaskID == mergedPlaybackPrefix+previous.DramaID {
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if _, _, err := app.mergedPlaybackTaskLocked(previous.TaskID); err == nil {
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input.TaskID = previous.TaskID
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}
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}
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if input.TaskID == "" {
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candidate := app.tasks[previous.TaskID]
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if isPlayableDownloadTask(candidate) && candidate.DramaID == previous.DramaID {
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input.TaskID = candidate.ID
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} else {
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for _, taskID := range app.taskOrder {
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candidate = app.tasks[taskID]
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if isPlayableDownloadTask(candidate) && candidate.DramaID == previous.DramaID {
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input.TaskID = candidate.ID
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break
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}
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}
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}
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}
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}
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if input.TaskID != "" {
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if !app.requireTaskSourcesLocked(writer, request, taskSelection{IDs: []string{input.TaskID}}) {
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app.mu.Unlock()
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return
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}
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title, tasks, downloadIDs, initialIndex, collectionErr = app.collectionPlaybackTasksLocked(input.TaskID)
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} else {
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for _, candidate := range app.dramas {
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if candidate.ID == input.DramaID && input.DramaID != "" {
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drama = candidate
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break
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}
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}
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}
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app.mu.Unlock()
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if input.TaskID != "" && len(tasks) > 0 && input.Resume {
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previous, hasPrevious = history.get(tasks[0].DramaID)
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}
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if input.TaskID == "" && drama.ID == "" && input.Resume && hasPrevious {
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drama = Drama{ID: previous.DramaID, Source: previous.Source, Title: previous.Title}
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}
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if collectionErr != nil {
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writeJSON(writer, http.StatusNotFound, map[string]string{"error": app.redactError(collectionErr)})
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return
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}
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if input.TaskID == "" && drama.ID == "" {
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writeJSON(writer, http.StatusNotFound, map[string]string{"error": "此短剧不在当前剧库中，请刷新剧库后重试"})
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return
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}
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if drama.ID != "" && !dramaAllowed(request.Context(), drama.ID, drama.Source) {
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writeSourceDenied(writer)
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return
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}
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for _, task := range tasks {
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if !taskSourceAllowed(request.Context(), task) {
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writeSourceDenied(writer)
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return
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}
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}
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sessionDramaID := drama.ID
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if len(tasks) > 0 {
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sessionDramaID = tasks[0].DramaID
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}
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ctx, cancel := context.WithTimeout(request.Context(), 90*time.Second)
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defer cancel()
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id := randomHex(24)
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if id == "" {
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writeJSON(writer, http.StatusInternalServerError, map[string]string{"error": "无法创建播放会话"})
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return
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}
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app.playbackMu.Lock()
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if app.activePlaybackSessionsLocked() >= app.mediaResources().snapshot().MaxSessions {
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app.playbackMu.Unlock()
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writeJSON(writer, http.StatusTooManyRequests, map[string]string{"error": "同时播放数量已达上限，请稍后再试"})
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return
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}
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if app.playbacks == nil {
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app.playbacks = make(map[string]*playbackSession)
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}
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session := &playbackSession{downloadIDs: downloadIDs, dramaID: sessionDramaID, id: id, viewer: viewer, expires: time.Now().Add(playbackIdleTimeout), state: "opening", cancel: cancel, openedAt: openedAt, historyRuns: make(map[uint64]playbackHistoryRun)}
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viewer.retain()
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app.playbacks[id] = session
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session.timer = time.AfterFunc(playbackIdleTimeout, func() { app.expirePlayback(id) })
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app.playbackMu.Unlock()
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ready := false
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defer func() {
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if !ready {
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app.closePlayback(id)
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}
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}()
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if input.TaskID == "" {
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fetchedTitle, chapters, err := app.downloader.GetDramaChapters(ctx, drama.ID)
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if err == nil && len(chapters) == 0 {
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err = errors.New("站点未返回可播放的分集")
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}
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if err != nil {
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writeJSON(writer, http.StatusBadGateway, map[string]string{"error": "获取选集失败：" + app.redactError(err)})
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return
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}
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title = firstNonEmpty(fetchedTitle, drama.DisplayTitle())
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for index, chapter := range chapters {
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tasks = append(tasks, Task{DramaID: drama.ID, DramaTitle: title, Chapter: chapter, Index: index + 1, Total: len(chapters)})
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}
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}
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for _, task := range tasks {
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if !taskSourceAllowed(request.Context(), task) {
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writeSourceDenied(writer)
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return
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}
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}
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episodes := make([]playbackEpisode, 0, len(tasks))
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for index, task := range tasks {
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number := task.Index
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if number < 1 {
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number = index + 1
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}
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total := task.Total
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if total < len(tasks) {
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total = len(tasks)
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}
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if total < number {
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total = number
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}
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episode := playbackEpisode{VIP: task.Chapter.VIP, Index: index + 1, Episode: task.Chapter.EpisodeString(number), Title: task.Chapter.Title, ChapterID: task.Chapter.ID, Number: number, Total: total}
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_, _, episode.Danmaku = hongguoPlaybackIDs(task)
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if len(downloadIDs) > 0 {
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episode.TaskID = downloadIDs[index]
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episode.Merged = strings.HasPrefix(episode.TaskID, mergedPlaybackPrefix)
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if episode.Merged {
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episode.Danmaku = false
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}
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}
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episodes = append(episodes, episode)
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}
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app.playbackMu.Lock()
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if app.playbacks[id] == session && ctx.Err() == nil {
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session.tasks = tasks
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session.downloadIDs = downloadIDs
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session.prepared = make(map[int]bool)
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session.cancel = nil
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session.state = "ready"
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app.touchPlaybackLocked(session)
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ready = true
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}
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app.playbackMu.Unlock()
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if !ready {
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writeJSON(writer, http.StatusRequestTimeout, map[string]string{"error": "播放准备超时，请重新打开本剧"})
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return
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}
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mode := "online"
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if len(downloadIDs) > 0 {
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mode = "collection"
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}
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initialPosition, resumePaused, resumeMessage := float64(0), false, ""
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if input.Resume && hasPrevious {
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initialIndex, initialPosition, resumePaused, resumeMessage = playbackHistoryResume(previous, tasks, initialIndex)
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}
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dramaID, source, _ := playbackHistoryIdentity(tasks[0].DramaID)
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writeJSON(writer, http.StatusOK, map[string]any{"session": id, "dramaId": dramaID, "source": source, "title": title, "releaseStatus": dramaReleaseStatus(drama), "vip": drama.VIP, "episodes": episodes, "mimeType": playbackMIME, "mode": mode, "initialIndex": initialIndex, "initialPosition": initialPosition, "resumePaused": resumePaused, "resumeMessage": resumeMessage})
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}
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func (app *UIApp) touchPlaybackLocked(session *playbackSession) {
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session.expires = time.Now().Add(playbackIdleTimeout)
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if session.timer != nil {
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session.timer.Reset(playbackIdleTimeout)
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}
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}
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func (app *UIApp) expirePlayback(id string) {
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app.playbackMu.Lock()
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session := app.playbacks[id]
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if session != nil && time.Now().Before(session.expires) {
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session.timer.Reset(time.Until(session.expires))
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app.playbackMu.Unlock()
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return
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}
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if session != nil {
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delete(app.playbacks, id)
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}
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app.playbackMu.Unlock()
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if session != nil && session.cancel != nil {
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session.cancel()
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}
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if session != nil && session.prefetch != nil {
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session.prefetch.cancel()
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}
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if session != nil {
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session.viewer.release()
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}
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}
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func (app *UIApp) closePlayback(id string) {
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app.playbackMu.Lock()
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session := app.playbacks[id]
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if session != nil {
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delete(app.playbacks, id)
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session.timer.Stop()
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}
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app.playbackMu.Unlock()
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if session != nil && session.cancel != nil {
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session.cancel()
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}
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if session != nil && session.prefetch != nil {
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session.prefetch.cancel()
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}
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if session != nil {
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session.viewer.release()
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}
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}
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func (app *UIApp) closePlaybacks() {
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app.playbackMu.Lock()
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sessions := app.playbacks
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app.playbacks = nil
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for _, session := range sessions {
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session.timer.Stop()
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}
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app.playbackMu.Unlock()
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for _, session := range sessions {
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session.viewer.release()
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if session.cancel != nil {
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session.cancel()
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}
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if session.prefetch != nil {
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session.prefetch.cancel()
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}
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}
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}
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func (app *UIApp) playbackStatus(id string, touch bool) (playbackView, bool) {
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app.playbackMu.Lock()
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defer app.playbackMu.Unlock()
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session := app.playbacks[id]
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if session == nil {
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return playbackView{}, false
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}
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if touch {
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app.touchPlaybackLocked(session)
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}
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view := playbackView{State: session.state, Error: session.error, Run: session.run, Duration: session.duration}
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if session.native != nil {
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state, err := session.native.state()
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view.State = state
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if err != nil {
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view.Error = app.redactError(err)
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}
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}
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if session.media != nil {
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plan := session.media.plan
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view.Plan = &plan
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view.MediaBytes = session.media.bytes.Load()
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view.MediaFailure = session.media.failed.Load() || session.media.proxy != nil && session.media.proxy.Err() != nil
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}
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if session.prefetch != nil {
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view.Prefetch = session.prefetch.view()
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}
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return view, true
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}
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func (app *UIApp) handlePlaybackControl(writer http.ResponseWriter, request *http.Request) {
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var input struct {
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Session string `json:"session"`
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Action string `json:"action"`
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Progress *playbackHistoryProgress `json:"progress,omitempty"`
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}
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if !readPlaybackRequest(writer, request, &input) {
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return
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}
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if !app.requirePlaybackOwner(writer, request, input.Session) {
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return
|
|
}
|
|
if input.Action == "close" {
|
|
var progressError string
|
|
if input.Progress != nil {
|
|
if _, _, err := app.recordPlaybackProgress(contextViewer(request.Context()), input.Session, *input.Progress); err != nil {
|
|
progressError = publicError(err).Error()
|
|
}
|
|
}
|
|
app.closePlayback(input.Session)
|
|
writeJSON(writer, http.StatusOK, map[string]any{"ok": true, "historyError": progressError})
|
|
return
|
|
}
|
|
if input.Action != "heartbeat" {
|
|
writeJSON(writer, http.StatusBadRequest, map[string]string{"error": "不支持此播放操作"})
|
|
return
|
|
}
|
|
if state, ok := app.playbackStatus(input.Session, true); ok {
|
|
writeJSON(writer, http.StatusOK, state)
|
|
} else {
|
|
writeJSON(writer, http.StatusGone, map[string]string{"error": "播放会话已过期，请重新打开本剧"})
|
|
}
|
|
}
|
|
|
|
func (app *UIApp) handlePlaybackStatus(writer http.ResponseWriter, request *http.Request) {
|
|
if !playbackRequestAllowed(writer, request, http.MethodGet) {
|
|
return
|
|
}
|
|
if !app.requirePlaybackOwner(writer, request, request.URL.Query().Get("session")) {
|
|
return
|
|
}
|
|
if state, ok := app.playbackStatus(request.URL.Query().Get("session"), false); ok {
|
|
writeJSON(writer, http.StatusOK, state)
|
|
} else {
|
|
writeJSON(writer, http.StatusGone, map[string]string{"error": "播放会话已过期，请重新打开本剧"})
|
|
}
|
|
}
|
|
|
|
func (app *UIApp) handlePlaybackStream(writer http.ResponseWriter, request *http.Request) {
|
|
if !playbackRequestAllowed(writer, request, http.MethodGet) {
|
|
return
|
|
}
|
|
query := request.URL.Query()
|
|
index, indexErr := strconv.Atoi(query.Get("episode"))
|
|
offset, offsetErr := strconv.ParseFloat(firstNonEmpty(query.Get("start"), "0"), 64)
|
|
if indexErr != nil || index < 1 || offsetErr != nil || math.IsNaN(offset) || math.IsInf(offset, 0) || offset < 0 || offset > 24*60*60 {
|
|
writeJSON(writer, http.StatusBadRequest, map[string]string{"error": "集数或播放位置无效"})
|
|
return
|
|
}
|
|
quality, qualityErr := parsePlaybackQuality(query.Get("quality"))
|
|
version, versionErr := strconv.ParseUint(firstNonEmpty(query.Get("version"), "0"), 10, 64)
|
|
if qualityErr != nil || versionErr != nil {
|
|
writeJSON(writer, http.StatusBadRequest, map[string]string{"error": "清晰度或播放请求编号无效"})
|
|
return
|
|
}
|
|
ctx := context.WithValue(request.Context(), playbackRemuxKey{}, query.Get("remux") == "1")
|
|
run, status, err := app.beginPlayback(ctx, query.Get("session"), index, offset, quality, version, false)
|
|
if err != nil {
|
|
writeJSON(writer, status, map[string]string{"error": err.Error()})
|
|
return
|
|
}
|
|
defer run.stop()
|
|
writer = &playbackActivityWriter{ResponseWriter: writer, app: app, run: run}
|
|
startupTimer := time.AfterFunc(90*time.Second, run.cancel)
|
|
defer startupTimer.Stop()
|
|
ready := func(duration float64) {
|
|
startupTimer.Stop()
|
|
app.playbackRunReady(run, duration)
|
|
}
|
|
used, err := app.servePrefetchedPlayback(run.ctx, writer, run.cache, run.run, ready)
|
|
if !used {
|
|
err = app.streamPlayback(run.ctx, run.cancel, writer, run.task, run.downloadID, offset, run.run, ready)
|
|
}
|
|
app.finishPlaybackRun(run, err, request.Context().Err() != nil)
|
|
}
|