Fix issues with repair, move to a different streaming option

docs/docs/guides/rclone.md

@@ -51,7 +51,7 @@ Create a `config.json` file in `/opt/decypharr/` with your Decypharr configurati
       "folder": "/mnt/remote/realdebrid/__all__/",
       "rate_limit": "250/minute",
       "use_webdav": true,
-      "rc_url": "http://your-ip-address:5572" // Rclone RC URL
+      "rc_url": "http://your-ip-address:5572"
     }
   ],
   "qbittorrent": {
@@ -99,7 +99,7 @@ services:
       decypharr:
         condition: service_healthy
         restart: true
-    command: "mount decypharr: /data --allow-non-empty --allow-other --dir-cache-time 10s --rc --rc-addr :5572 --rc-no-auth "
+    command: "mount decypharr: /data --allow-non-empty --allow-other --dir-cache-time 10s --rc --rc-addr :5572 --rc-no-auth"
 ```
 
 #### Docker Notes

pkg/debrid/store/repair.go

@@ -111,6 +111,8 @@ func (c *Cache) GetBrokenFiles(t *CachedTorrent, filenames []string) []string {
 		}(f)
 	}
 
+	wg.Wait()
+
 	// Try to reinsert the torrent if it's broken
 	if len(brokenFiles) > 0 && t.Torrent != nil {
 		// Check if the torrent is already in progress

pkg/qbit/http.go

@@ -108,7 +108,7 @@ func (q *QBit) handleTorrentsAdd(w http.ResponseWriter, r *http.Request) {
 		}
 		for _, url := range urlList {
 			if err := q.addMagnet(ctx, url, _arr, debridName, action); err != nil {
-				q.logger.Debug().Err(err).Msgf("Error adding magnet")
+				q.logger.Debug().Msgf("Error adding magnet: %s", err.Error())
 				http.Error(w, err.Error(), http.StatusBadRequest)
 				return
 			}

pkg/webdav/file.go

@@ -27,35 +27,52 @@ var sharedClient = &http.Client{
 	Timeout: 0,
 }
 
+type streamError struct {
+	Err                   error
+	StatusCode            int
+	IsClientDisconnection bool
+}
+
+func (e *streamError) Error() string {
+	return e.Err.Error()
+}
+
+func (e *streamError) Unwrap() error {
+	return e.Err
+}
+
 type File struct {
-	cache       *store.Cache
-	fileId      string
-	torrentName string
-
-	modTime time.Time
-
-	size         int64
-	offset       int64
-	isDir        bool
-	children     []os.FileInfo
-	reader       io.ReadCloser
-	seekPending  bool
-	content      []byte
-	isRar        bool
 	name         string
-	metadataOnly bool
+	torrentName  string
-
-	downloadLink string
 	link         string
+	downloadLink string
+	size         int64
+	isDir        bool
+	fileId       string
+	isRar        bool
+	metadataOnly bool
+	content      []byte
+	children     []os.FileInfo // For directories
+	cache        *store.Cache
+	modTime      time.Time
+
+	// Minimal state for interface compliance only
+	readOffset int64 // Only used for Read() method compliance
 }
 
 // File interface implementations for File
 
 func (f *File) Close() error {
-	if f.reader != nil {
+	if f.isDir {
-		f.reader.Close()
+		return nil // No resources to close for directories
-		f.reader = nil
 	}
+
+	// For files, we don't have any resources to close either
+	// This is just to satisfy the os.File interface
+	f.content = nil
+	f.children = nil
+	f.downloadLink = ""
+	f.readOffset = 0
 	return nil
 }
 
@@ -84,211 +101,274 @@ func (f *File) getDownloadByteRange() (*[2]int64, error) {
 	return byteRange, nil
 }
 
-func (f *File) stream() (*http.Response, error) {
+func (f *File) servePreloadedContent(w http.ResponseWriter, r *http.Request) error {
-	client := sharedClient
+	content := f.content
+	size := int64(len(content))
+
+	// Handle range requests for preloaded content
+	if rangeHeader := r.Header.Get("Range"); rangeHeader != "" {
+		ranges, err := parseRange(rangeHeader, size)
+		if err != nil || len(ranges) != 1 {
+			w.Header().Set("Content-Range", fmt.Sprintf("bytes */%d", size))
+			return &streamError{Err: fmt.Errorf("invalid range"), StatusCode: http.StatusRequestedRangeNotSatisfiable}
+		}
+
+		start, end := ranges[0].start, ranges[0].end
+		w.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", start, end, size))
+		w.Header().Set("Content-Length", fmt.Sprintf("%d", end-start+1))
+		w.Header().Set("Accept-Ranges", "bytes")
+		w.WriteHeader(http.StatusPartialContent)
+
+		_, err = w.Write(content[start : end+1])
+		return err
+	}
+
+	// Full content
+	w.Header().Set("Content-Length", fmt.Sprintf("%d", size))
+	w.Header().Set("Accept-Ranges", "bytes")
+	w.WriteHeader(http.StatusOK)
+
+	_, err := w.Write(content)
+	return err
+}
+
+func (f *File) StreamResponse(w http.ResponseWriter, r *http.Request) error {
+	// Handle preloaded content files
+	if f.content != nil {
+		return f.servePreloadedContent(w, r)
+	}
+
+	// Try streaming with retry logic
+	return f.streamWithRetry(w, r, 0)
+}
+
+func (f *File) streamWithRetry(w http.ResponseWriter, r *http.Request, retryCount int) error {
+	const maxRetries = 0
 	_log := f.cache.Logger()
 
+	// Get download link (with caching optimization)
 	downloadLink, err := f.getDownloadLink()
 	if err != nil {
-		_log.Trace().Msgf("Failed to get download link for %s: %v", f.name, err)
+		return &streamError{Err: err, StatusCode: http.StatusPreconditionFailed}
-		return nil, err
 	}
 
 	if downloadLink == "" {
-		_log.Trace().Msgf("Failed to get download link for %s. Empty download link", f.name)
+		return &streamError{Err: fmt.Errorf("empty download link"), StatusCode: http.StatusNotFound}
-		return nil, fmt.Errorf("empty download link")
 	}
 
-	byteRange, err := f.getDownloadByteRange()
+	// Create upstream request with streaming optimizations
+	upstreamReq, err := http.NewRequest("GET", downloadLink, nil)
 	if err != nil {
-		_log.Trace().Msgf("Failed to get download byte range for %s: %v", f.name, err)
+		return &streamError{Err: err, StatusCode: http.StatusInternalServerError}
-		return nil, err
 	}
 
-	req, err := http.NewRequest("GET", downloadLink, nil)
+	setVideoStreamingHeaders(upstreamReq)
+
+	// Handle range requests (critical for video seeking)
+	isRangeRequest := f.handleRangeRequest(upstreamReq, r, w)
+	if isRangeRequest == -1 {
+		return &streamError{Err: fmt.Errorf("invalid range"), StatusCode: http.StatusRequestedRangeNotSatisfiable}
+	}
+
+	resp, err := sharedClient.Do(upstreamReq)
 	if err != nil {
-		_log.Trace().Msgf("Failed to create HTTP request: %v", err)
+		return &streamError{Err: err, StatusCode: http.StatusServiceUnavailable}
-		return nil, err
+	}
+	defer resp.Body.Close()
+
+	// Handle upstream errors with retry logic
+	shouldRetry, retryErr := f.handleUpstream(resp, retryCount, maxRetries)
+	if shouldRetry && retryCount < maxRetries {
+		// Retry with new download link
+		_log.Debug().
+			Int("retry_count", retryCount+1).
+			Str("file", f.name).
+			Msg("Retrying stream request")
+		return f.streamWithRetry(w, r, retryCount+1)
+	}
+	if retryErr != nil {
+		return retryErr
 	}
 
-	if byteRange == nil {
+	setVideoResponseHeaders(w, resp, isRangeRequest == 1)
-		req.Header.Set("Range", fmt.Sprintf("bytes=%d-", max(0, f.offset)))
-	} else {
-		req.Header.Set("Range", fmt.Sprintf("bytes=%d-", byteRange[0]+max(0, f.offset)))
-	}
 
-	// Make the request
+	// Stream with optimized buffering for video
-	resp, err := client.Do(req)
+	return f.streamVideoOptimized(w, resp.Body)
-	if err != nil {
-		_log.Trace().Msgf("HTTP request failed: %v", err)
-		return nil, err
-	}
-
-	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusPartialContent {
-		f.downloadLink = ""
-
-		cleanupResp := func(resp *http.Response) {
-			if resp.Body != nil {
-				_, _ = io.Copy(io.Discard, resp.Body)
-				resp.Body.Close()
-			}
-		}
-
-		switch resp.StatusCode {
-		case http.StatusServiceUnavailable:
-			// Read the body to check for specific error messages
-			body, readErr := io.ReadAll(resp.Body)
-			cleanupResp(resp)
-
-			if readErr != nil {
-				_log.Trace().Msgf("Failed to read response body: %v", readErr)
-				return nil, fmt.Errorf("failed to read error response: %w", readErr)
-			}
-
-			bodyStr := string(body)
-			if strings.Contains(bodyStr, "You can not download this file because you have exceeded your traffic on this hoster") {
-				_log.Trace().Msgf("Bandwidth exceeded for %s. Download token will be disabled if you have more than one", f.name)
-				f.cache.MarkDownloadLinkAsInvalid(f.link, downloadLink, "bandwidth_exceeded")
-				// Retry with a different API key if it's available
-				return f.stream()
-			}
-
-			return nil, fmt.Errorf("service unavailable: %s", bodyStr)
-
-		case http.StatusNotFound:
-			cleanupResp(resp)
-			// Mark download link as not found
-			// Regenerate a new download link
-			_log.Trace().Msgf("Link not found (404) for %s. Marking link as invalid and regenerating", f.name)
-			f.cache.MarkDownloadLinkAsInvalid(f.link, downloadLink, "link_not_found")
-			// Generate a new download link
-			downloadLink, err := f.getDownloadLink()
-			if err != nil {
-				_log.Trace().Msgf("Failed to get download link for %s. %s", f.name, err)
-				return nil, err
-			}
-
-			if downloadLink == "" {
-				_log.Trace().Msgf("Failed to get download link for %s", f.name)
-				return nil, fmt.Errorf("failed to regenerate download link")
-			}
-
-			req, err := http.NewRequest("GET", downloadLink, nil)
-			if err != nil {
-				return nil, err
-			}
-
-			// Set the range header again
-			if byteRange == nil {
-				req.Header.Set("Range", fmt.Sprintf("bytes=%d-", max(0, f.offset)))
-			} else {
-				req.Header.Set("Range", fmt.Sprintf("bytes=%d-", byteRange[0]+max(0, f.offset)))
-			}
-
-			newResp, err := client.Do(req)
-			if err != nil {
-				return nil, err
-			}
-
-			if newResp.StatusCode != http.StatusOK && newResp.StatusCode != http.StatusPartialContent {
-				cleanupResp(newResp)
-				_log.Trace().Msgf("Regenerated link also failed with status %d", newResp.StatusCode)
-				f.cache.MarkDownloadLinkAsInvalid(f.link, downloadLink, newResp.Status)
-				return nil, fmt.Errorf("failed with status code %d even after link regeneration", newResp.StatusCode)
-			}
-
-			return newResp, nil
-
-		default:
-			body, _ := io.ReadAll(resp.Body)
-			cleanupResp(resp)
-
-			_log.Trace().Msgf("Unexpected status code %d for %s: %s", resp.StatusCode, f.name, string(body))
-			return nil, fmt.Errorf("unexpected status code %d: %s", resp.StatusCode, string(body))
-		}
-	}
-	return resp, nil
 }
 
-func (f *File) Read(p []byte) (n int, err error) {
+func (f *File) handleUpstream(resp *http.Response, retryCount, maxRetries int) (shouldRetry bool, err error) {
-	if f.isDir {
+	if resp.StatusCode == http.StatusOK || resp.StatusCode == http.StatusPartialContent {
-		return 0, os.ErrInvalid
+		return false, nil
-	}
-	if f.metadataOnly {
-		return 0, io.EOF
-	}
-	if f.content != nil {
-		if f.offset >= int64(len(f.content)) {
-			return 0, io.EOF
-		}
-		n = copy(p, f.content[f.offset:])
-		f.offset += int64(n)
-		return n, nil
 	}
 
-	// If we haven't started streaming the file yet or need to reposition
+	_log := f.cache.Logger()
-	if f.reader == nil || f.seekPending {
+
-		if f.reader != nil {
+	// Clean up response body properly
-			f.reader.Close()
+	cleanupResp := func(resp *http.Response) {
-			f.reader = nil
+		if resp.Body != nil {
+			_, _ = io.Copy(io.Discard, resp.Body)
+			resp.Body.Close()
+		}
+	}
+
+	switch resp.StatusCode {
+	case http.StatusServiceUnavailable:
+		// Read the body to check for specific error messages
+		body, readErr := io.ReadAll(resp.Body)
+		cleanupResp(resp)
+
+		if readErr != nil {
+			_log.Error().Err(readErr).Msg("Failed to read response body")
+			return false, &streamError{
+				Err:        fmt.Errorf("failed to read error response: %w", readErr),
+				StatusCode: http.StatusServiceUnavailable,
+			}
 		}
 
-		// Make the request to get the file
+		bodyStr := string(body)
-		resp, err := f.stream()
+		if strings.Contains(bodyStr, "you have exceeded your traffic") {
-		if err != nil {
+			_log.Debug().
-			return 0, err
+				Str("file", f.name).
-		}
+				Int("retry_count", retryCount).
-		if resp == nil {
+				Msg("Bandwidth exceeded. Marking link as invalid")
-			return 0, fmt.Errorf("stream returned nil response")
+
+			f.cache.MarkDownloadLinkAsInvalid(f.link, f.downloadLink, "bandwidth_exceeded")
+
+			// Retry with a different API key if available and we haven't exceeded retries
+			if retryCount < maxRetries {
+				return true, nil
+			}
+
+			return false, &streamError{
+				Err:        fmt.Errorf("bandwidth exceeded after %d retries", retryCount),
+				StatusCode: http.StatusServiceUnavailable,
+			}
 		}
 
-		f.reader = resp.Body
+		return false, &streamError{
-		f.seekPending = false
+			Err:        fmt.Errorf("service unavailable: %s", bodyStr),
-	}
+			StatusCode: http.StatusServiceUnavailable,
+		}
 
-	n, err = f.reader.Read(p)
+	case http.StatusNotFound:
-	f.offset += int64(n)
+		cleanupResp(resp)
 
-	if err != nil {
+		_log.Debug().
-		f.reader.Close()
+			Str("file", f.name).
-		f.reader = nil
+			Int("retry_count", retryCount).
-	}
+			Msg("Link not found (404). Marking link as invalid and regenerating")
 
-	return n, err
+		f.cache.MarkDownloadLinkAsInvalid(f.link, f.downloadLink, "link_not_found")
-}
 
-func (f *File) Seek(offset int64, whence int) (int64, error) {
+		// Try to regenerate download link if we haven't exceeded retries
-	if f.isDir {
+		if retryCount < maxRetries {
-		return 0, os.ErrInvalid
+			// Clear cached link to force regeneration
-	}
+			f.downloadLink = ""
+			return true, nil
+		}
+
+		return false, &streamError{
+			Err:        fmt.Errorf("file not found after %d retries", retryCount),
+			StatusCode: http.StatusNotFound,
+		}
 
-	newOffset := f.offset
-	switch whence {
-	case io.SeekStart:
-		newOffset = offset
-	case io.SeekCurrent:
-		newOffset += offset
-	case io.SeekEnd:
-		newOffset = f.size + offset
 	default:
-		return 0, os.ErrInvalid
+		body, _ := io.ReadAll(resp.Body)
-	}
+		cleanupResp(resp)
 
-	if newOffset < 0 {
+		_log.Error().
-		newOffset = 0
+			Int("status_code", resp.StatusCode).
-	}
+			Str("file", f.name).
-	if newOffset > f.size {
+			Str("response_body", string(body)).
-		newOffset = f.size
+			Msg("Unexpected upstream error")
-	}
 
-	// Only mark seek as pending if position actually changed
+		return false, &streamError{
-	if newOffset != f.offset {
+			Err:        fmt.Errorf("upstream error %d: %s", resp.StatusCode, string(body)),
-		f.offset = newOffset
+			StatusCode: http.StatusBadGateway,
-		f.seekPending = true
+		}
 	}
-	return f.offset, nil
 }
 
+func (f *File) handleRangeRequest(upstreamReq *http.Request, r *http.Request, w http.ResponseWriter) int {
+	rangeHeader := r.Header.Get("Range")
+	if rangeHeader == "" {
+		// For video files, apply byte range if exists
+		if byteRange, _ := f.getDownloadByteRange(); byteRange != nil {
+			upstreamReq.Header.Set("Range", fmt.Sprintf("bytes=%d-%d", byteRange[0], byteRange[1]))
+		}
+		return 0 // No range request
+	}
+
+	// Parse range request
+	ranges, err := parseRange(rangeHeader, f.size)
+	if err != nil || len(ranges) != 1 {
+		w.Header().Set("Content-Range", fmt.Sprintf("bytes */%d", f.size))
+		return -1 // Invalid range
+	}
+
+	// Apply byte range offset if exists
+	byteRange, _ := f.getDownloadByteRange()
+	start, end := ranges[0].start, ranges[0].end
+
+	if byteRange != nil {
+		start += byteRange[0]
+		end += byteRange[0]
+	}
+
+	upstreamReq.Header.Set("Range", fmt.Sprintf("bytes=%d-%d", start, end))
+	return 1 // Valid range request
+}
+
+func (f *File) streamVideoOptimized(w http.ResponseWriter, src io.Reader) error {
+	// Use larger buffer for video streaming (better throughput)
+	buf := make([]byte, 64*1024) // 64KB buffer
+
+	// First chunk optimization - send immediately for faster start
+	n, err := src.Read(buf)
+	if err != nil && err != io.EOF {
+		if isClientDisconnection(err) {
+			return &streamError{Err: err, StatusCode: 0, IsClientDisconnection: true}
+		}
+		return &streamError{Err: err, StatusCode: 0}
+	}
+
+	if n > 0 {
+		// Write first chunk immediately
+		_, writeErr := w.Write(buf[:n])
+		if writeErr != nil {
+			if isClientDisconnection(writeErr) {
+				return &streamError{Err: writeErr, StatusCode: 0, IsClientDisconnection: true}
+			}
+			return &streamError{Err: writeErr, StatusCode: 0}
+		}
+
+		// Flush immediately for faster video start
+		if flusher, ok := w.(http.Flusher); ok {
+			flusher.Flush()
+		}
+	}
+
+	if err == io.EOF {
+		return nil
+	}
+
+	// Continue with optimized copy for remaining data
+	_, err = io.CopyBuffer(w, src, buf)
+	if err != nil {
+		if isClientDisconnection(err) {
+			return &streamError{Err: err, StatusCode: 0, IsClientDisconnection: true}
+		}
+		return &streamError{Err: err, StatusCode: 0}
+	}
+
+	return nil
+}
+
+/*
+These are the methods that implement the os.File interface for the File type.
+Only Stat and ReadDir are used
+*/
+
 func (f *File) Stat() (os.FileInfo, error) {
 	if f.isDir {
 		return &FileInfo{
@@ -309,18 +389,61 @@ func (f *File) Stat() (os.FileInfo, error) {
 	}, nil
 }
 
-func (f *File) ReadAt(p []byte, off int64) (n int, err error) {
+func (f *File) Read(p []byte) (n int, err error) {
-	// Save current position
+	if f.isDir {
-
+		return 0, os.ErrInvalid
-	// Seek to requested position
-	_, err = f.Seek(off, io.SeekStart)
-	if err != nil {
-		return 0, err
 	}
 
-	// Read the data
+	if f.metadataOnly {
-	n, err = f.Read(p)
+		return 0, io.EOF
-	return n, err
+	}
+
+	// For preloaded content files (like version.txt)
+	if f.content != nil {
+		if f.readOffset >= int64(len(f.content)) {
+			return 0, io.EOF
+		}
+		n = copy(p, f.content[f.readOffset:])
+		f.readOffset += int64(n)
+		return n, nil
+	}
+
+	// For streaming files, return an error to force use of StreamResponse
+	return 0, fmt.Errorf("use StreamResponse method for streaming files")
+}
+
+func (f *File) Seek(offset int64, whence int) (int64, error) {
+	if f.isDir {
+		return 0, os.ErrInvalid
+	}
+
+	// Only handle seeking for preloaded content
+	if f.content != nil {
+		newOffset := f.readOffset
+		switch whence {
+		case io.SeekStart:
+			newOffset = offset
+		case io.SeekCurrent:
+			newOffset += offset
+		case io.SeekEnd:
+			newOffset = int64(len(f.content)) + offset
+		default:
+			return 0, os.ErrInvalid
+		}
+
+		if newOffset < 0 {
+			newOffset = 0
+		}
+		if newOffset > int64(len(f.content)) {
+			newOffset = int64(len(f.content))
+		}
+
+		f.readOffset = newOffset
+		return f.readOffset, nil
+	}
+
+	// For streaming files, return error to force use of StreamResponse
+	return 0, fmt.Errorf("use StreamResponse method for streaming files")
 }
 
 func (f *File) Write(p []byte) (n int, err error) {

pkg/webdav/handler.go

@@ -2,6 +2,7 @@ package webdav
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"github.com/sirrobot01/decypharr/pkg/debrid/types"
 	"golang.org/x/net/webdav"
@@ -415,104 +416,90 @@ func (h *Handler) serveDirectory(w http.ResponseWriter, r *http.Request, file we
 func (h *Handler) handleGet(w http.ResponseWriter, r *http.Request) {
 	fRaw, err := h.OpenFile(r.Context(), r.URL.Path, os.O_RDONLY, 0)
 	if err != nil {
-		h.logger.Error().Err(err).
-			Str("path", r.URL.Path).
-			Msg("Failed to open file")
 		http.NotFound(w, r)
 		return
 	}
-	defer func(fRaw webdav.File) {
+	defer fRaw.Close()
-		err := fRaw.Close()
-		if err != nil {
-			h.logger.Error().Err(err).Msg("Failed to close file")
-			return
-		}
-	}(fRaw)
 
 	fi, err := fRaw.Stat()
 	if err != nil {
-		h.logger.Error().Err(err).Msg("Failed to stat file")
 		http.Error(w, "Server Error", http.StatusInternalServerError)
 		return
 	}
 
-	// If the target is a directory, use your directory listing logic.
 	if fi.IsDir() {
 		h.serveDirectory(w, r, fRaw)
 		return
 	}
 
-	// Checks if the file is a torrent file
+	// Set common headers
-	// .content is nil if the file is a torrent file
-	// .content means file is preloaded, e.g version.txt
-	if file, ok := fRaw.(*File); ok && file.content == nil {
-		link, err := file.getDownloadLink()
-		if err != nil {
-			h.logger.Debug().
-				Err(err).
-				Str("link", file.link).
-				Str("path", r.URL.Path).
-				Msg("Could not fetch download link")
-			http.Error(w, "Could not fetch download link", http.StatusPreconditionFailed)
-			return
-		}
-		if link == "" {
-			http.NotFound(w, r)
-			return
-		}
-		file.downloadLink = link
-		// If the torrent file is not a RAR file and users enabled proxy streaming
-		if !file.isRar && h.cache.StreamWithRclone() {
-			w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
-			w.Header().Set("Pragma", "no-cache")
-			w.Header().Set("Expires", "0")
-			w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", fi.Name()))
-			w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
-			w.Header().Set("Last-Modified", fi.ModTime().UTC().Format(http.TimeFormat))
-			w.Header().Set("Accept-Ranges", "bytes")
-			w.Header().Set("X-Accel-Redirect", file.downloadLink)
-			w.Header().Set("X-Accel-Buffering", "no")
-			http.Redirect(w, r, file.downloadLink, http.StatusFound)
-			return
-		}
-	}
-
-	// ETags
 	etag := fmt.Sprintf("\"%x-%x\"", fi.ModTime().Unix(), fi.Size())
 	w.Header().Set("ETag", etag)
+	w.Header().Set("Last-Modified", fi.ModTime().UTC().Format(http.TimeFormat))
 
-	// 7. Content-Type by extension
 	ext := filepath.Ext(fi.Name())
-	contentType := mime.TypeByExtension(ext)
+	if contentType := mime.TypeByExtension(ext); contentType != "" {
-	if contentType == "" {
+		w.Header().Set("Content-Type", contentType)
-		contentType = "application/octet-stream"
+	} else {
+		w.Header().Set("Content-Type", "application/octet-stream")
 	}
-	w.Header().Set("Content-Type", contentType)
 
-	rs, ok := fRaw.(io.ReadSeeker)
+	// Handle File struct with direct streaming
-	if !ok {
+	if file, ok := fRaw.(*File); ok {
-		if r.Header.Get("Range") != "" {
+		// Handle nginx proxy (X-Accel-Redirect)
-			http.Error(w, "Range not supported", http.StatusRequestedRangeNotSatisfiable)
+		if file.content == nil && !file.isRar && h.cache.StreamWithRclone() {
+			link, err := file.getDownloadLink()
+			if err != nil || link == "" {
+				http.Error(w, "Could not fetch download link", http.StatusPreconditionFailed)
+				return
+			}
+
+			w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", fi.Name()))
+			w.Header().Set("X-Accel-Redirect", link)
+			w.Header().Set("X-Accel-Buffering", "no")
+			http.Redirect(w, r, link, http.StatusFound)
 			return
 		}
-		w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
+
-		w.Header().Set("Last-Modified", fi.ModTime().UTC().Format(http.TimeFormat))
+		if err := file.StreamResponse(w, r); err != nil {
-		w.Header().Set("Accept-Ranges", "bytes")
+			var streamErr *streamError
-		ctx := r.Context()
+			if errors.As(err, &streamErr) {
-		done := make(chan struct{})
+				// Handle client disconnections silently (just debug log)
-		go func() {
+				if errors.Is(streamErr.Err, context.Canceled) || errors.Is(streamErr.Err, context.DeadlineExceeded) || streamErr.IsClientDisconnection {
-			defer close(done)
+					return // Don't log as error or try to write response
-			_, _ = io.Copy(w, fRaw)
+				}
-		}()
+
-		select {
+				if streamErr.StatusCode > 0 && !hasHeadersWritten(w) {
-		case <-ctx.Done():
+					http.Error(w, streamErr.Error(), streamErr.StatusCode)
-			h.logger.Debug().Msg("Client cancelled download")
+				} else {
-			return
+					h.logger.Error().
-		case <-done:
+						Err(streamErr.Err).
+						Str("path", r.URL.Path).
+						Msg("Stream error")
+				}
+			} else {
+				// Generic error
+				if !hasHeadersWritten(w) {
+					http.Error(w, "Stream error", http.StatusInternalServerError)
+				} else {
+					h.logger.Error().
+						Err(err).
+						Str("path", r.URL.Path).
+						Msg("Stream error after headers written")
+				}
+			}
 		}
 		return
 	}
-	http.ServeContent(w, r, fi.Name(), fi.ModTime(), rs)
+
+	// Fallback to ServeContent for other webdav.File implementations
+	if rs, ok := fRaw.(io.ReadSeeker); ok {
+		http.ServeContent(w, r, fi.Name(), fi.ModTime(), rs)
+	} else {
+		w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
+		w.WriteHeader(http.StatusOK)
+		_, _ = io.Copy(w, fRaw)
+	}
 }
 
 func (h *Handler) handleHead(w http.ResponseWriter, r *http.Request) {

pkg/webdav/misc.go

@@ -1,6 +1,7 @@
 package webdav
 
 import (
+	"fmt"
 	"github.com/stanNthe5/stringbuf"
 	"net/http"
 	"net/url"
@@ -132,3 +133,122 @@ func writeXml(w http.ResponseWriter, status int, buf stringbuf.StringBuf) {
 	w.WriteHeader(status)
 	_, _ = w.Write(buf.Bytes())
 }
+
+func hasHeadersWritten(w http.ResponseWriter) bool {
+	// Most ResponseWriter implementations support this
+	if hw, ok := w.(interface{ Written() bool }); ok {
+		return hw.Written()
+	}
+	return false
+}
+
+func isClientDisconnection(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	errStr := err.Error()
+	// Common client disconnection error patterns
+	return strings.Contains(errStr, "broken pipe") ||
+		strings.Contains(errStr, "connection reset by peer") ||
+		strings.Contains(errStr, "write: connection reset") ||
+		strings.Contains(errStr, "read: connection reset") ||
+		strings.Contains(errStr, "context canceled") ||
+		strings.Contains(errStr, "context deadline exceeded") ||
+		strings.Contains(errStr, "client disconnected") ||
+		strings.Contains(errStr, "EOF")
+}
+
+type httpRange struct{ start, end int64 }
+
+func parseRange(s string, size int64) ([]httpRange, error) {
+	if s == "" {
+		return nil, nil
+	}
+	const b = "bytes="
+	if !strings.HasPrefix(s, b) {
+		return nil, fmt.Errorf("invalid range")
+	}
+
+	var ranges []httpRange
+	for _, ra := range strings.Split(s[len(b):], ",") {
+		ra = strings.TrimSpace(ra)
+		if ra == "" {
+			continue
+		}
+		i := strings.Index(ra, "-")
+		if i < 0 {
+			return nil, fmt.Errorf("invalid range")
+		}
+		start, end := strings.TrimSpace(ra[:i]), strings.TrimSpace(ra[i+1:])
+		var r httpRange
+		if start == "" {
+			i, err := strconv.ParseInt(end, 10, 64)
+			if err != nil {
+				return nil, fmt.Errorf("invalid range")
+			}
+			if i > size {
+				i = size
+			}
+			r.start = size - i
+			r.end = size - 1
+		} else {
+			i, err := strconv.ParseInt(start, 10, 64)
+			if err != nil || i < 0 {
+				return nil, fmt.Errorf("invalid range")
+			}
+			r.start = i
+			if end == "" {
+				r.end = size - 1
+			} else {
+				i, err := strconv.ParseInt(end, 10, 64)
+				if err != nil || r.start > i {
+					return nil, fmt.Errorf("invalid range")
+				}
+				if i >= size {
+					i = size - 1
+				}
+				r.end = i
+			}
+		}
+		if r.start > size-1 {
+			continue
+		}
+		ranges = append(ranges, r)
+	}
+	return ranges, nil
+}
+
+func setVideoStreamingHeaders(req *http.Request) {
+	// Request optimizations for faster response
+	req.Header.Set("Accept", "*/*")
+	req.Header.Set("Accept-Encoding", "identity")
+	req.Header.Set("Connection", "keep-alive")
+	req.Header.Set("User-Agent", "VideoStream/1.0")
+	req.Header.Set("Priority", "u=1")
+}
+
+func setVideoResponseHeaders(w http.ResponseWriter, resp *http.Response, isRange bool) {
+	// Copy essential headers from upstream
+	if contentLength := resp.Header.Get("Content-Length"); contentLength != "" {
+		w.Header().Set("Content-Length", contentLength)
+	}
+
+	if contentRange := resp.Header.Get("Content-Range"); contentRange != "" && isRange {
+		w.Header().Set("Content-Range", contentRange)
+	}
+
+	// Video streaming optimizations
+	w.Header().Set("Accept-Ranges", "bytes")   // Enable seeking
+	w.Header().Set("Connection", "keep-alive") // Keep connection open
+
+	// Prevent buffering in proxies/CDNs
+	w.Header().Set("X-Accel-Buffering", "no") // Nginx
+	w.Header().Set("Proxy-Buffering", "off")  // General proxy
+
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Headers", "Range")
+	w.Header().Set("Access-Control-Expose-Headers", "Content-Length, Content-Range")
+
+	w.WriteHeader(resp.StatusCode)
+}