Display bytes written to response instead of size of files being served in logs

README.md

@@ -119,14 +119,15 @@ Flags:
       --cache-file string    path to optional persistent cache file
       --code                 enable support for source code files
       --code-theme string    theme for source code syntax highlighting (default "solarized-dark256")
+      --exit-on-error        shut down webserver on error, instead of just printing the error
   -f, --filter               enable filtering
       --flash                enable support for shockwave flash files (via ruffle.rs)
       --handlers             display registered handlers (for debugging)
   -h, --help                 help for roulette
       --images               enable support for image files
   -i, --info                 expose informational endpoints
-      --maximum-files uint32   skip directories with file counts above this value (default 4294967295)
-      --minimum-files uint32   skip directories with file counts below this value (default 1)
+      --maximum-files uint   skip directories with file counts above this value (default 4294967295)
+      --minimum-files uint   skip directories with file counts below this value (default 1)
       --page-length uint32   pagination length for info pages
   -p, --port uint16          port to listen on (default 8080)
       --prefix string        root path for http handlers (for reverse proxying) (default "/")

cmd/cache.go

@@ -64,14 +64,6 @@ func (cache *fileCache) set(val []string) {
 	cache.list = make([]string, length)
 	copy(cache.list, val)
 	cache.mutex.Unlock()
-}
-
-func (cache *fileCache) generate(args []string, formats *types.Types) {
-	cache.mutex.Lock()
-	cache.list = []string{}
-	cache.mutex.Unlock()
-
-	fileList(args, &filters{}, "", cache, formats)
 
 	if Cache && CacheFile != "" {
 		cache.Export(CacheFile)
@@ -136,9 +128,16 @@ func (cache *fileCache) Import(path string) error {
 	return nil
 }
 
-func serveCacheClear(args []string, cache *fileCache, formats *types.Types) httprouter.Handle {
+func serveCacheClear(args []string, cache *fileCache, formats *types.Types, errorChannel chan<- error) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
-		cache.generate(args, formats)
+		list, err := fileList(args, &filters{}, "", &fileCache{}, formats)
+		if err != nil {
+			errorChannel <- err
+
+			return
+		}
+
+		cache.set(list)
 
 		w.Header().Set("Content-Type", "text/plain")
 
@@ -146,7 +145,7 @@ func serveCacheClear(args []string, cache *fileCache, formats *types.Types) http
 	}
 }
 
-func registerCacheHandlers(mux *httprouter.Router, args []string, cache *fileCache, formats *types.Types) {
+func registerCacheHandlers(mux *httprouter.Router, args []string, cache *fileCache, formats *types.Types, errorChannel chan<- error) error {
 	skipIndex := false
 
 	if CacheFile != "" {
@@ -157,8 +156,15 @@ func registerCacheHandlers(mux *httprouter.Router, args []string, cache *fileCac
 	}
 
 	if !skipIndex {
-		cache.generate(args, formats)
+		list, err := fileList(args, &filters{}, "", &fileCache{}, formats)
+		if err != nil {
+			return err
 		}
 
-	register(mux, Prefix+"/clear_cache", serveCacheClear(args, cache, formats))
+		cache.set(list)
+	}
+
+	register(mux, Prefix+"/clear_cache", serveCacheClear(args, cache, formats, errorChannel))
+
+	return nil
 }

cmd/errors.go

@@ -36,7 +36,7 @@ func notFound(w http.ResponseWriter, r *http.Request, path string) error {
 	startTime := time.Now()
 
 	if Verbose {
-		fmt.Printf("%s | Unavailable file %s requested by %s\n",
+		fmt.Printf("%s | Error: Unavailable file %s requested by %s\n",
 			startTime.Format(logDate),
 			path,
 			r.RemoteAddr,
@@ -58,7 +58,7 @@ func serverError(w http.ResponseWriter, r *http.Request, i interface{}) {
 	startTime := time.Now()
 
 	if Verbose {
-		fmt.Printf("%s | Invalid request for %s from %s\n",
+		fmt.Printf("%s | Error: Invalid request for %s from %s\n",
 			startTime.Format(logDate),
 			r.URL.Path,
 			r.RemoteAddr,

cmd/favicons.go

@@ -27,12 +27,14 @@ const (
 	<meta name="theme-color" content="#ffffff">`
 )
 
-func serveFavicons() httprouter.Handle {
+func serveFavicons(errorChannel chan<- error) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
 		fname := strings.TrimPrefix(r.URL.Path, "/")
 
 		data, err := favicons.ReadFile(fname)
 		if err != nil {
+			errorChannel <- err
+
 			return
 		}
 

cmd/files.go

@@ -17,7 +17,6 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-	"sync/atomic"
 	"time"
 
 	"seedno.de/seednode/roulette/types"
@@ -41,22 +40,11 @@ type concurrency struct {
 	fileScans      chan int
 }
 
-type files struct {
-	mutex sync.RWMutex
-	list  []string
-}
-
-func (f *files) append(path string) {
-	f.mutex.Lock()
-	f.list = append(f.list, path)
-	f.mutex.Unlock()
-}
-
 type scanStats struct {
-	filesMatched       atomic.Uint32
-	filesSkipped       atomic.Uint32
-	directoriesMatched atomic.Uint32
-	directoriesSkipped atomic.Uint32
+	filesMatched       int
+	filesSkipped       int
+	directoriesMatched int
+	directoriesSkipped int
 }
 
 type splitPath struct {
@@ -91,6 +79,19 @@ func humanReadableSize(bytes int) string {
 		float64(bytes)/float64(div), "KMGTPE"[exp])
 }
 
+func kill(path string, cache *fileCache) error {
+	err := os.Remove(path)
+	if err != nil {
+		return err
+	}
+
+	if Cache {
+		cache.remove(path)
+	}
+
+	return nil
+}
+
 func preparePath(path string) string {
 	if runtime.GOOS == "windows" {
 		return fmt.Sprintf("%s/%s", mediaPrefix, filepath.ToSlash(path))
@@ -102,7 +103,7 @@ func preparePath(path string) string {
 func newFile(paths []string, filters *filters, sortOrder string, regexes *regexes, cache *fileCache, formats *types.Types) (string, error) {
 	path, err := pickFile(paths, filters, sortOrder, cache, formats)
 	if err != nil {
-		return "", nil
+		return "", err
 	}
 
 	splitPath, err := split(path, regexes)
@@ -230,7 +231,7 @@ func pathIsValid(path string, paths []string) bool {
 
 	switch {
 	case Verbose && !matchesPrefix:
-		fmt.Printf("%s | Error: Failed to serve file outside specified path(s): %s\n",
+		fmt.Printf("%s | Error: File outside specified path(s): %s\n",
 			time.Now().Format(logDate),
 			path,
 		)
@@ -274,9 +275,9 @@ func pathHasSupportedFiles(path string, formats *types.Types) (bool, error) {
 	}
 }
 
-func pathCount(path string) (uint32, uint32, error) {
-	var directories uint32 = 0
-	var files uint32 = 0
+func pathCount(path string) (int, int, error) {
+	var directories = 0
+	var files = 0
 
 	nodes, err := os.ReadDir(path)
 	if err != nil {
@@ -294,9 +295,16 @@ func pathCount(path string) (uint32, uint32, error) {
 	return files, directories, nil
 }
 
-func scanPath(path string, files *files, stats *scanStats, concurrency *concurrency, formats *types.Types) error {
+func scanPath(path string, fileChannel chan<- string, statChannel chan<- *scanStats, errorChannel chan<- error, concurrency *concurrency, formats *types.Types) {
 	var wg sync.WaitGroup
 
+	stats := &scanStats{
+		filesMatched:       0,
+		filesSkipped:       0,
+		directoriesMatched: 0,
+		directoriesSkipped: 0,
+	}
+
 	err := filepath.WalkDir(path, func(p string, info os.DirEntry, err error) error {
 		if err != nil {
 			return err
@@ -318,34 +326,34 @@ func scanPath(path string, files *files, stats *scanStats, concurrency *concurre
 
 				path, err := normalizePath(p)
 				if err != nil {
-					fmt.Println(err)
+					errorChannel <- err
 				}
 
 				if !formats.Validate(path) {
-					stats.filesSkipped.Add(1)
+					stats.filesSkipped = stats.filesSkipped + 1
 
 					return
 				}
 
-				files.append(path)
+				fileChannel <- path
 
-				stats.filesMatched.Add(1)
+				stats.filesMatched = stats.filesMatched + 1
 			}()
 		case info.IsDir():
 			files, directories, err := pathCount(p)
 			if err != nil {
-				fmt.Println(err)
+				errorChannel <- err
 			}
 
-			if files > 0 && (files < MinimumFileCount) || (files > MaximumFileCount) {
+			if files > 0 && (files < int(MinimumFileCount)) || (files > int(MaximumFileCount)) {
 				// This count will not otherwise include the parent directory itself, so increment by one
-				stats.directoriesSkipped.Add(directories + 1)
-				stats.filesSkipped.Add(files)
+				stats.directoriesSkipped = stats.directoriesSkipped + directories + 1
+				stats.filesSkipped = stats.filesSkipped + files
 
 				return filepath.SkipDir
 			}
 
-			stats.directoriesMatched.Add(1)
+			stats.directoriesMatched = stats.directoriesMatched + 1
 		}
 
 		return err
@@ -353,24 +361,26 @@ func scanPath(path string, files *files, stats *scanStats, concurrency *concurre
 
 	wg.Wait()
 
+	statChannel <- stats
+
 	if err != nil {
-		return err
+		errorChannel <- err
+	}
 }
 
-	return nil
-}
+func scanPaths(paths []string, sort string, cache *fileCache, formats *types.Types) ([]string, error) {
+	var list []string
 
-func scanPaths(paths []string, sort string, cache *fileCache, formats *types.Types) []string {
-	files := &files{
-		mutex: sync.RWMutex{},
-		list:  []string{},
-	}
+	fileChannel := make(chan string)
+	statChannel := make(chan *scanStats)
+	errorChannel := make(chan error)
+	done := make(chan bool, 1)
 
 	stats := &scanStats{
-		filesMatched:       atomic.Uint32{},
-		filesSkipped:       atomic.Uint32{},
-		directoriesMatched: atomic.Uint32{},
-		directoriesSkipped: atomic.Uint32{},
+		filesMatched:       0,
+		filesSkipped:       0,
+		directoriesMatched: 0,
+		directoriesSkipped: 0,
 	}
 
 	concurrency := &concurrency{
@@ -393,55 +403,95 @@ func scanPaths(paths []string, sort string, cache *fileCache, formats *types.Typ
 				wg.Done()
 			}()
 
-			err := scanPath(paths[i], files, stats, concurrency, formats)
-			if err != nil {
-				fmt.Println(err)
-			}
+			scanPath(paths[i], fileChannel, statChannel, errorChannel, concurrency, formats)
 		}(i)
 	}
 
+	go func() {
 		wg.Wait()
+		done <- true
+	}()
 
-	if stats.filesMatched.Load() < 1 {
+Poll:
+	for {
+		select {
+		case p := <-fileChannel:
+			list = append(list, p)
+		case s := <-statChannel:
+			stats.filesMatched = stats.filesMatched + s.filesMatched
+			stats.filesSkipped = stats.filesSkipped + s.filesSkipped
+			stats.directoriesMatched = stats.directoriesMatched + s.directoriesMatched
+			stats.directoriesSkipped = stats.directoriesSkipped + s.directoriesSkipped
+		case e := <-errorChannel:
+			return []string{}, e
+		case <-done:
+			break Poll
+		}
+	}
+
+	if stats.filesMatched < 1 {
 		fmt.Println("No files matched")
-		return []string{}
+		return []string{}, nil
 	}
 
 	if Verbose {
-		fmt.Printf("%s | Indexed %d/%d files across %d/%d directories in %s\n",
+		fmt.Printf("%s | Index: %d/%d files across %d/%d directories in %s\n",
 			time.Now().Format(logDate),
-			stats.filesMatched.Load(),
-			stats.filesMatched.Load()+stats.filesSkipped.Load(),
-			stats.directoriesMatched.Load(),
-			stats.directoriesMatched.Load()+stats.directoriesSkipped.Load(),
+			stats.filesMatched,
+			stats.filesMatched+stats.filesSkipped,
+			stats.directoriesMatched,
+			stats.directoriesMatched+stats.directoriesSkipped,
 			time.Since(startTime),
 		)
 	}
 
-	return files.list
+	return list, nil
 }
 
-func fileList(paths []string, filters *filters, sort string, cache *fileCache, formats *types.Types) []string {
+func fileList(paths []string, filters *filters, sort string, cache *fileCache, formats *types.Types) ([]string, error) {
 	switch {
 	case Cache && !cache.isEmpty() && filters.isEmpty():
-		return cache.List()
+		return cache.List(), nil
 	case Cache && !cache.isEmpty() && !filters.isEmpty():
-		return filters.apply(cache.List())
+		return filters.apply(cache.List()), nil
 	case Cache && cache.isEmpty() && !filters.isEmpty():
-		cache.set(scanPaths(paths, sort, cache, formats))
-		return filters.apply(cache.List())
+		list, err := scanPaths(paths, sort, cache, formats)
+		if err != nil {
+			return []string{}, err
+		}
+		cache.set(list)
+
+		return filters.apply(cache.List()), nil
 	case Cache && cache.isEmpty() && filters.isEmpty():
-		cache.set(scanPaths(paths, sort, cache, formats))
-		return cache.List()
+		list, err := scanPaths(paths, sort, cache, formats)
+		if err != nil {
+			return []string{}, err
+		}
+		cache.set(list)
+
+		return cache.List(), nil
 	case !Cache && !filters.isEmpty():
-		return filters.apply(scanPaths(paths, sort, cache, formats))
+		list, err := scanPaths(paths, sort, cache, formats)
+		if err != nil {
+			return []string{}, err
+		}
+
+		return filters.apply(list), nil
 	default:
-		return scanPaths(paths, sort, cache, formats)
+		list, err := scanPaths(paths, sort, cache, formats)
+		if err != nil {
+			return []string{}, err
+		}
+
+		return list, nil
 	}
 }
 
 func pickFile(args []string, filters *filters, sort string, cache *fileCache, formats *types.Types) (string, error) {
-	list := fileList(args, filters, sort, cache, formats)
+	list, err := fileList(args, filters, sort, cache, formats)
+	if err != nil {
+		return "", err
+	}
 
 	fileCount := len(list)
 

cmd/info.go

@@ -123,7 +123,7 @@ func serveIndexHtml(args []string, cache *fileCache, paginate bool) httprouter.H
 		}
 
 		if Verbose {
-			fmt.Printf("%s | Served HTML index page (%s) to %s in %s\n",
+			fmt.Printf("%s | Serve: HTML index page (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				humanReadableSize(b),
 				realIP(r),
@@ -133,7 +133,7 @@ func serveIndexHtml(args []string, cache *fileCache, paginate bool) httprouter.H
 	}
 }
 
-func serveIndexJson(args []string, index *fileCache) httprouter.Handle {
+func serveIndexJson(args []string, index *fileCache, errorChannel chan<- error) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
 		w.Header().Set("Content-Type", "application/json")
 
@@ -168,7 +168,7 @@ func serveIndexJson(args []string, index *fileCache) httprouter.Handle {
 
 		response, err := json.MarshalIndent(cachedFiles[startIndex:stopIndex], "", "    ")
 		if err != nil {
-			fmt.Println(err)
+			errorChannel <- err
 
 			serverError(w, r, nil)
 
@@ -178,7 +178,7 @@ func serveIndexJson(args []string, index *fileCache) httprouter.Handle {
 		w.Write(response)
 
 		if Verbose {
-			fmt.Printf("%s | Served JSON index page (%s) to %s in %s\n",
+			fmt.Printf("%s | Serve: JSON index page (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				humanReadableSize(len(response)),
 				realIP(r),
@@ -199,7 +199,7 @@ func serveAvailableExtensions() httprouter.Handle {
 		w.Write(response)
 
 		if Verbose {
-			fmt.Printf("%s | Served available extensions list (%s) to %s in %s\n",
+			fmt.Printf("%s | Serve: Available extension list (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				humanReadableSize(len(response)),
 				realIP(r),
@@ -220,7 +220,7 @@ func serveEnabledExtensions(formats *types.Types) httprouter.Handle {
 		w.Write(response)
 
 		if Verbose {
-			fmt.Printf("%s | Served registered extensions list (%s) to %s in %s\n",
+			fmt.Printf("%s | Serve: Registered extension list (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				humanReadableSize(len(response)),
 				realIP(r),
@@ -241,7 +241,7 @@ func serveAvailableMimeTypes() httprouter.Handle {
 		w.Write(response)
 
 		if Verbose {
-			fmt.Printf("%s | Served available MIME types list (%s) to %s in %s\n",
+			fmt.Printf("%s | Served available MIME type list (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				humanReadableSize(len(response)),
 				realIP(r),
@@ -262,7 +262,7 @@ func serveEnabledMimeTypes(formats *types.Types) httprouter.Handle {
 		w.Write(response)
 
 		if Verbose {
-			fmt.Printf("%s | Served registered MIME types list (%s) to %s in %s\n",
+			fmt.Printf("%s | Served registered MIME type list (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				humanReadableSize(len(response)),
 				realIP(r),
@@ -272,16 +272,16 @@ func serveEnabledMimeTypes(formats *types.Types) httprouter.Handle {
 	}
 }
 
-func registerInfoHandlers(mux *httprouter.Router, args []string, cache *fileCache, formats *types.Types) {
+func registerInfoHandlers(mux *httprouter.Router, args []string, cache *fileCache, formats *types.Types, errorChannel chan<- error) {
 	if Cache {
 		register(mux, Prefix+"/html/", serveIndexHtml(args, cache, false))
 		if PageLength != 0 {
 			register(mux, Prefix+"/html/:page", serveIndexHtml(args, cache, true))
 		}
 
-		register(mux, Prefix+"/json", serveIndexJson(args, cache))
+		register(mux, Prefix+"/json", serveIndexJson(args, cache, errorChannel))
 		if PageLength != 0 {
-			register(mux, Prefix+"/json/:page", serveIndexJson(args, cache))
+			register(mux, Prefix+"/json/:page", serveIndexJson(args, cache, errorChannel))
 		}
 	}
 

cmd/root.go

@@ -11,7 +11,7 @@ import (
 )
 
 const (
-	ReleaseVersion string = "0.87.0"
+	ReleaseVersion string = "0.90.3"
 )
 
 var (
@@ -22,13 +22,14 @@ var (
 	CacheFile        string
 	Code             bool
 	CodeTheme        string
+	ExitOnError      bool
 	Filtering        bool
 	Flash            bool
 	Handlers         bool
 	Images           bool
 	Info             bool
-	MaximumFileCount uint32
-	MinimumFileCount uint32
+	MaximumFileCount uint
+	MinimumFileCount uint
 	PageLength       uint32
 	Port             uint16
 	Prefix           string
@@ -72,13 +73,14 @@ func init() {
 	rootCmd.Flags().StringVar(&CacheFile, "cache-file", "", "path to optional persistent cache file")
 	rootCmd.Flags().BoolVar(&Code, "code", false, "enable support for source code files")
 	rootCmd.Flags().StringVar(&CodeTheme, "code-theme", "solarized-dark256", "theme for source code syntax highlighting")
+	rootCmd.Flags().BoolVar(&ExitOnError, "exit-on-error", false, "shut down webserver on error, instead of just printing the error")
 	rootCmd.Flags().BoolVarP(&Filtering, "filter", "f", false, "enable filtering")
 	rootCmd.Flags().BoolVar(&Flash, "flash", false, "enable support for shockwave flash files (via ruffle.rs)")
 	rootCmd.Flags().BoolVar(&Handlers, "handlers", false, "display registered handlers (for debugging)")
 	rootCmd.Flags().BoolVar(&Images, "images", false, "enable support for image files")
 	rootCmd.Flags().BoolVarP(&Info, "info", "i", false, "expose informational endpoints")
-	rootCmd.Flags().Uint32Var(&MaximumFileCount, "maximum-files", 1<<32-1, "skip directories with file counts above this value")
-	rootCmd.Flags().Uint32Var(&MinimumFileCount, "minimum-files", 1, "skip directories with file counts below this value")
+	rootCmd.Flags().UintVar(&MaximumFileCount, "maximum-files", 1<<32-1, "skip directories with file counts above this value")
+	rootCmd.Flags().UintVar(&MinimumFileCount, "minimum-files", 1, "skip directories with file counts below this value")
 	rootCmd.Flags().Uint32Var(&PageLength, "page-length", 0, "pagination length for info pages")
 	rootCmd.Flags().Uint16VarP(&Port, "port", "p", 8080, "port to listen on")
 	rootCmd.Flags().StringVar(&Prefix, "prefix", "/", "root path for http handlers (for reverse proxying)")

cmd/web.go

@@ -6,6 +6,7 @@ package cmd
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"io"
@@ -39,7 +40,7 @@ const (
 	timeout            time.Duration = 10 * time.Second
 )
 
-func serveStaticFile(paths []string, cache *fileCache) httprouter.Handle {
+func serveStaticFile(paths []string, cache *fileCache, errorChannel chan<- error) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
 		prefix := Prefix + sourcePrefix
 
@@ -47,7 +48,7 @@ func serveStaticFile(paths []string, cache *fileCache) httprouter.Handle {
 
 		prefixedFilePath, err := stripQueryParams(path)
 		if err != nil {
-			fmt.Println(err)
+			errorChannel <- err
 
 			serverError(w, r, nil)
 
@@ -56,7 +57,7 @@ func serveStaticFile(paths []string, cache *fileCache) httprouter.Handle {
 
 		filePath, err := filepath.EvalSymlinks(strings.TrimPrefix(prefixedFilePath, prefix))
 		if err != nil {
-			fmt.Println(err)
+			errorChannel <- err
 
 			serverError(w, r, nil)
 
@@ -71,6 +72,8 @@ func serveStaticFile(paths []string, cache *fileCache) httprouter.Handle {
 
 		exists, err := fileExists(filePath)
 		if err != nil {
+			errorChannel <- err
+
 			serverError(w, r, nil)
 
 			return
@@ -86,33 +89,40 @@ func serveStaticFile(paths []string, cache *fileCache) httprouter.Handle {
 
 		buf, err := os.ReadFile(filePath)
 		if err != nil {
+			errorChannel <- err
+
 			serverError(w, r, nil)
 
 			return
 		}
 
-		w.Write(buf)
+		written, _ := w.Write(buf)
 
-		fileSize := humanReadableSize(len(buf))
-
-		if Russian {
-			err = os.Remove(filePath)
+		refererUri, err := stripQueryParams(refererToUri(r.Referer()))
 		if err != nil {
+			errorChannel <- err
+
 			serverError(w, r, nil)
 
 			return
 		}
 
-			if Cache {
-				cache.remove(filePath)
+		if Russian && refererUri != "" {
+			err = kill(filePath, cache)
+			if err != nil {
+				errorChannel <- err
+
+				serverError(w, r, nil)
+
+				return
 			}
 		}
 
 		if Verbose {
-			fmt.Printf("%s | Served %s (%s) to %s in %s\n",
+			fmt.Printf("%s | Serve: %s (%s) to %s in %s\n",
 				startTime.Format(logDate),
 				filePath,
-				fileSize,
+				humanReadableSize(written),
 				realIP(r),
 				time.Since(startTime).Round(time.Microsecond),
 			)
@@ -120,11 +130,11 @@ func serveStaticFile(paths []string, cache *fileCache) httprouter.Handle {
 	}
 }
 
-func serveRoot(paths []string, regexes *regexes, cache *fileCache, formats *types.Types) httprouter.Handle {
+func serveRoot(paths []string, regexes *regexes, cache *fileCache, formats *types.Types, errorChannel chan<- error) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
 		refererUri, err := stripQueryParams(refererToUri(r.Referer()))
 		if err != nil {
-			fmt.Println(err)
+			errorChannel <- err
 
 			serverError(w, r, nil)
 
@@ -147,7 +157,7 @@ func serveRoot(paths []string, regexes *regexes, cache *fileCache, formats *type
 		if refererUri != "" {
 			filePath, err = nextFile(strippedRefererUri, sortOrder, regexes, formats)
 			if err != nil {
-				fmt.Println(err)
+				errorChannel <- err
 
 				serverError(w, r, nil)
 
@@ -174,7 +184,7 @@ func serveRoot(paths []string, regexes *regexes, cache *fileCache, formats *type
 
 				return
 			case err != nil:
-				fmt.Println(err)
+				errorChannel <- err
 
 				serverError(w, r, nil)
 
@@ -194,7 +204,7 @@ func serveRoot(paths []string, regexes *regexes, cache *fileCache, formats *type
 	}
 }
 
-func serveMedia(paths []string, regexes *regexes, formats *types.Types) httprouter.Handle {
+func serveMedia(paths []string, regexes *regexes, cache *fileCache, formats *types.Types, errorChannel chan<- error) httprouter.Handle {
 	return func(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
 		filters := &filters{
 			included: splitQueryParams(r.URL.Query().Get("include"), regexes),
@@ -211,7 +221,7 @@ func serveMedia(paths []string, regexes *regexes, formats *types.Types) httprout
 
 		exists, err := fileExists(path)
 		if err != nil {
-			fmt.Println(err)
+			errorChannel <- err
 
 			serverError(w, r, nil)
 
@@ -252,24 +262,62 @@ func serveMedia(paths []string, regexes *regexes, formats *types.Types) httprout
 		htmlBody.WriteString(`<!DOCTYPE html><html class="bg" lang="en"><head>`)
 		htmlBody.WriteString(faviconHtml)
 		htmlBody.WriteString(fmt.Sprintf(`<style>%s</style>`, format.Css()))
-		htmlBody.WriteString((format.Title(rootUrl, fileUri, path, fileName, Prefix, mimeType)))
+
+		title, err := format.Title(rootUrl, fileUri, path, fileName, Prefix, mimeType)
+		if err != nil {
+			errorChannel <- err
+
+			serverError(w, r, nil)
+
+			return
+		}
+		htmlBody.WriteString(title)
 		htmlBody.WriteString(`</head><body>`)
 		if refreshInterval != "0ms" {
 			htmlBody.WriteString(fmt.Sprintf("<script>window.onload = function(){setInterval(function(){window.location.href = '%s';}, %d);};</script>",
 				rootUrl,
 				refreshTimer))
 		}
-		htmlBody.WriteString((format.Body(rootUrl, fileUri, path, fileName, Prefix, mimeType)))
-		htmlBody.WriteString(`</body></html>`)
 
-		_, err = io.WriteString(w, gohtml.Format(htmlBody.String()))
+		body, err := format.Body(rootUrl, fileUri, path, fileName, Prefix, mimeType)
 		if err != nil {
-			fmt.Println(err)
+			errorChannel <- err
 
 			serverError(w, r, nil)
 
 			return
 		}
+		htmlBody.WriteString(body)
+		htmlBody.WriteString(`</body></html>`)
+
+		startTime := time.Now()
+
+		formattedPage := gohtml.Format(htmlBody.String())
+
+		written, err := io.WriteString(w, formattedPage)
+		if err != nil {
+			errorChannel <- err
+
+			serverError(w, r, nil)
+
+			return
+		}
+
+		if format.Type() != "embed" {
+			if Verbose {
+				fmt.Printf("%s | Serve: %s (%s) to %s in %s\n",
+					startTime.Format(logDate),
+					path,
+					humanReadableSize(written),
+					realIP(r),
+					time.Since(startTime).Round(time.Microsecond),
+				)
+			}
+
+			if Russian {
+				kill(path, cache)
+			}
+		}
 	}
 }
 
@@ -387,7 +435,9 @@ func ServePage(args []string) error {
 		Prefix = Prefix + "/"
 	}
 
-	register(mux, Prefix, serveRoot(paths, regexes, cache, formats))
+	errorChannel := make(chan error)
+
+	register(mux, Prefix, serveRoot(paths, regexes, cache, formats, errorChannel))
 
 	Prefix = strings.TrimSuffix(Prefix, "/")
 
@@ -395,22 +445,25 @@ func ServePage(args []string) error {
 		register(mux, "/", redirectRoot())
 	}
 
-	register(mux, Prefix+"/favicons/*favicon", serveFavicons())
+	register(mux, Prefix+"/favicons/*favicon", serveFavicons(errorChannel))
 
-	register(mux, Prefix+"/favicon.ico", serveFavicons())
+	register(mux, Prefix+"/favicon.ico", serveFavicons(errorChannel))
 
-	register(mux, Prefix+mediaPrefix+"/*media", serveMedia(paths, regexes, formats))
+	register(mux, Prefix+mediaPrefix+"/*media", serveMedia(paths, regexes, cache, formats, errorChannel))
 
-	register(mux, Prefix+sourcePrefix+"/*static", serveStaticFile(paths, cache))
+	register(mux, Prefix+sourcePrefix+"/*static", serveStaticFile(paths, cache, errorChannel))
 
 	register(mux, Prefix+"/version", serveVersion())
 
 	if Cache {
-		registerCacheHandlers(mux, args, cache, formats)
+		err = registerCacheHandlers(mux, args, cache, formats, errorChannel)
+		if err != nil {
+			return err
+		}
 	}
 
 	if Info {
-		registerInfoHandlers(mux, args, cache, formats)
+		registerInfoHandlers(mux, args, cache, formats, errorChannel)
 	}
 
 	if Profile {
@@ -421,6 +474,18 @@ func ServePage(args []string) error {
 		fmt.Printf("WARNING! Files *will* be deleted after serving!\n\n")
 	}
 
+	go func() {
+		for err := range errorChannel {
+			fmt.Printf("%s | Error: %v\n", time.Now().Format(logDate), err)
+
+			if ExitOnError {
+				fmt.Printf("%s | Error: Shutting down...\n", time.Now().Format(logDate))
+
+				srv.Shutdown(context.Background())
+			}
+		}
+	}()
+
 	err = srv.ListenAndServe()
 	if !errors.Is(err, http.ErrServerClosed) {
 		return err

types/audio/audio.go

@@ -22,16 +22,16 @@ func (t Format) Css() string {
 	return css.String()
 }
 
-func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
-	return fmt.Sprintf(`<title>%s</title>`, fileName)
+func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
+	return fmt.Sprintf(`<title>%s</title>`, fileName), nil
 }
 
-func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	return fmt.Sprintf(`<a href="%s"><audio controls autoplay loop preload="auto"><source src="%s" type="%s" alt="Roulette selected: %s">Your browser does not support the audio tag.</audio></a>`,
 		rootUrl,
 		fileUri,
 		mime,
-		fileName)
+		fileName), nil
 }
 
 func (t Format) Extensions() map[string]string {
@@ -57,6 +57,10 @@ func (t Format) Validate(filePath string) bool {
 	return true
 }
 
+func (t Format) Type() string {
+	return "embed"
+}
+
 func New() Format {
 	return Format{}
 }

types/code/code.go

@@ -60,14 +60,14 @@ func (t Format) Css() string {
 	return css.String()
 }
 
-func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
-	return fmt.Sprintf(`<title>%s</title>`, fileName)
+func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
+	return fmt.Sprintf(`<title>%s</title>`, fileName), nil
 }
 
-func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	contents, err := os.ReadFile(filePath)
 	if err != nil {
-		return ""
+		return "", err
 	}
 
 	contentString := string(contents)
@@ -97,24 +97,24 @@ func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string)
 
 	iterator, err := lexer.Tokenise(nil, contentString)
 	if err != nil {
-		return ""
+		return "", err
 	}
 
 	err = formatter.Format(w, style, iterator)
 	if err != nil {
-		return ""
+		return "", err
 	}
 
 	w.Flush()
 
 	b, err := io.ReadAll(r)
 	if err != nil {
-		return ""
+		return "", err
 	}
 
 	return fmt.Sprintf(`<a href="%s">%s</a>`,
 		rootUrl,
-		string(b))
+		string(b)), nil
 }
 
 func (t Format) Extensions() map[string]string {
@@ -221,6 +221,10 @@ func (t Format) Validate(filePath string) bool {
 	return true
 }
 
+func (t Format) Type() string {
+	return "inline"
+}
+
 func New(theme string) Format {
 	return Format{
 		Theme: theme,

types/flash/flash.go

@@ -22,17 +22,17 @@ func (t Format) Css() string {
 	return css.String()
 }
 
-func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
-	return fmt.Sprintf(`<title>%s</title>`, fileName)
+func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
+	return fmt.Sprintf(`<title>%s</title>`, fileName), nil
 }
 
-func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	var html strings.Builder
 
 	html.WriteString(fmt.Sprintf(`<script src="https://unpkg.com/@ruffle-rs/ruffle"></script><script>window.RufflePlayer.config = {autoplay:"on"};</script><embed src="%s"></embed>`, fileUri))
 	html.WriteString(fmt.Sprintf(`<br /><button onclick="window.location.href = '%s';">Next</button>`, rootUrl))
 
-	return html.String()
+	return html.String(), nil
 }
 
 func (t Format) Extensions() map[string]string {
@@ -56,6 +56,10 @@ func (t Format) Validate(filePath string) bool {
 	return true
 }
 
+func (t Format) Type() string {
+	return "embed"
+}
+
 func New() Format {
 	return Format{}
 }

types/images/images.go

@@ -37,22 +37,22 @@ func (t Format) Css() string {
 	return css.String()
 }
 
-func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	dimensions, err := ImageDimensions(filePath)
 	if err != nil {
-		fmt.Println(err)
+		return "", err
 	}
 
 	return fmt.Sprintf(`<title>%s (%dx%d)</title>`,
 		fileName,
 		dimensions.width,
-		dimensions.height)
+		dimensions.height), nil
 }
 
-func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	dimensions, err := ImageDimensions(filePath)
 	if err != nil {
-		fmt.Println(err)
+		return "", err
 	}
 
 	return fmt.Sprintf(`<a href="%s"><img src="%s" width="%d" height="%d" type="%s" alt="Roulette selected: %s"></a>`,
@@ -61,7 +61,7 @@ func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string)
 		dimensions.width,
 		dimensions.height,
 		mime,
-		fileName)
+		fileName), nil
 }
 
 func (t Format) Extensions() map[string]string {
@@ -120,6 +120,10 @@ func ImageDimensions(path string) (*dimensions, error) {
 	return &dimensions{width: decodedConfig.Width, height: decodedConfig.Height}, nil
 }
 
+func (t Format) Type() string {
+	return "embed"
+}
+
 func New() Format {
 	return Format{}
 }

types/text/text.go

@@ -27,11 +27,11 @@ func (t Format) Css() string {
 	return css.String()
 }
 
-func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
-	return fmt.Sprintf(`<title>%s</title>`, fileName)
+func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
+	return fmt.Sprintf(`<title>%s</title>`, fileName), nil
 }
 
-func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	body, err := os.ReadFile(filePath)
 	if err != nil {
 		body = []byte{}
@@ -39,7 +39,7 @@ func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string)
 
 	return fmt.Sprintf(`<a href="%s"><textarea autofocus readonly>%s</textarea></a>`,
 		rootUrl,
-		body)
+		body), nil
 }
 
 func (t Format) Extensions() map[string]string {
@@ -76,6 +76,10 @@ func (t Format) Validate(filePath string) bool {
 	return utf8.Valid(head)
 }
 
+func (t Format) Type() string {
+	return "inline"
+}
+
 func New() Format {
 	return Format{}
 }

types/types.go

@@ -15,9 +15,10 @@ var SupportedFormats = &Types{
 }
 
 type Type interface {
+	Type() string
 	Css() string
-	Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string
-	Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string
+	Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error)
+	Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error)
 	Extensions() map[string]string
 	MimeType(string) string
 	Validate(filePath string) bool

types/video/video.go

@@ -25,16 +25,16 @@ func (t Format) Css() string {
 	return css.String()
 }
 
-func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
-	return fmt.Sprintf(`<title>%s</title>`, fileName)
+func (t Format) Title(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
+	return fmt.Sprintf(`<title>%s</title>`, fileName), nil
 }
 
-func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) string {
+func (t Format) Body(rootUrl, fileUri, filePath, fileName, prefix, mime string) (string, error) {
 	return fmt.Sprintf(`<a href="%s"><video controls autoplay loop preload="auto"><source src="%s" type="%s" alt="Roulette selected: %s">Your browser does not support the video tag.</video></a>`,
 		rootUrl,
 		fileUri,
 		mime,
-		fileName)
+		fileName), nil
 }
 
 func (t Format) Extensions() map[string]string {
@@ -63,6 +63,10 @@ func (t Format) Validate(filePath string) bool {
 	return true
 }
 
+func (t Format) Type() string {
+	return "embed"
+}
+
 func New() Format {
 	return Format{}
 }