file metadata

internal/http/get.go

@@ -15,6 +15,85 @@ import (
 	"github.com/hashicorp/golang-lru/v2/expirable"
 )
 
+func HandleHeadRequest(w http.ResponseWriter, r *http.Request, t *torrent.TorrentManager, c config.ConfigInterface, cache *expirable.LRU[string, string]) {
+	requestPath := path.Clean(r.URL.Path)
+	requestPath = strings.Replace(requestPath, "/http", "/", 1)
+	if requestPath == "/favicon.ico" {
+		return
+	}
+
+	segments := strings.Split(requestPath, "/")
+	// If there are less than 3 segments, return an error or adjust as needed
+	if len(segments) < 4 {
+		log.Println("Method not implemented", r.Method, r.URL.Path)
+		http.Error(w, "Method not implemented", http.StatusMethodNotAllowed)
+		return
+	}
+
+	if data, exists := cache.Get("head:" + requestPath); exists {
+		splits := strings.Split(data, " ")
+		contentType := splits[0]
+		contentLength := splits[1]
+		w.Header().Set("Content-Type", contentType)
+		w.Header().Set("Content-Length", contentLength)
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	baseDirectory := segments[len(segments)-3]
+	torrentName := segments[len(segments)-2]
+	filename := segments[len(segments)-1]
+
+	torrents := findAllTorrentsWithName(t, baseDirectory, torrentName)
+	if torrents == nil {
+		log.Println("Cannot find torrent", torrentName, segments)
+		http.Error(w, "Cannot find file", http.StatusNotFound)
+		return
+	}
+
+	filenameV2, linkFragment := davextra.ExtractLinkFragment(filename)
+	_, file := getFile(torrents, filenameV2, linkFragment)
+	if file == nil {
+		log.Println("Cannot find file", filename, segments)
+		http.Error(w, "Cannot find file", http.StatusNotFound)
+		return
+	}
+	if file.Link == "" {
+		log.Println("Link not found", filename)
+		http.Error(w, "Cannot find file", http.StatusNotFound)
+		return
+	}
+	contentType := getContentMimeType(filename)
+	contentLength := fmt.Sprintf("%d", file.Bytes)
+	w.Header().Set("Content-Type", contentType)
+	w.Header().Set("Content-Length", contentLength)
+	cache.Add("head:"+requestPath, contentType+" "+contentLength)
+	w.WriteHeader(http.StatusOK)
+}
+
+func getContentMimeType(filePath string) string {
+	switch filepath.Ext(filePath) {
+	case ".mkv":
+		return "video/x-matroska"
+	case ".mp4":
+		return "video/mp4"
+	case ".avi":
+		return "video/x-msvideo"
+	case ".mp3":
+		return "audio/mpeg"
+	case ".rar":
+		return "application/x-rar-compressed"
+	case ".zip":
+		return "application/zip"
+	case ".7z":
+		return "application/x-7z-compressed"
+	case ".srt":
+		return "text/plain"
+	default:
+		return "application/octet-stream"
+	}
+}
+
 func HandleGetRequest(w http.ResponseWriter, r *http.Request, t *torrent.TorrentManager, c config.ConfigInterface, cache *expirable.LRU[string, string]) {
 	requestPath := path.Clean(r.URL.Path)
 	requestPath = strings.Replace(requestPath, "/http", "/", 1)