572 lines
11 KiB
Go
572 lines
11 KiB
Go
/*
|
|
Copyright © 2023 Seednode <seednode@seedno.de>
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
"regexp"
|
|
|
|
"crypto/rand"
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"seedno.de/seednode/roulette/types"
|
|
)
|
|
|
|
type maxConcurrency int
|
|
|
|
const (
|
|
// avoid hitting default open file descriptor limits (1024)
|
|
maxDirectoryScans maxConcurrency = 32
|
|
maxFileScans maxConcurrency = 256
|
|
)
|
|
|
|
type regexes struct {
|
|
alphanumeric *regexp.Regexp
|
|
filename *regexp.Regexp
|
|
}
|
|
|
|
type concurrency struct {
|
|
directoryScans chan int
|
|
fileScans chan int
|
|
}
|
|
|
|
type scanStats struct {
|
|
filesMatched int
|
|
filesSkipped int
|
|
directoriesMatched int
|
|
directoriesSkipped int
|
|
}
|
|
|
|
type splitPath struct {
|
|
base string
|
|
number int
|
|
extension string
|
|
}
|
|
|
|
func (splitPath *splitPath) increment() {
|
|
splitPath.number = splitPath.number + 1
|
|
}
|
|
|
|
func (splitPath *splitPath) decrement() {
|
|
splitPath.number = splitPath.number - 1
|
|
}
|
|
|
|
func humanReadableSize(bytes int) string {
|
|
const unit = 1000
|
|
|
|
if bytes < unit {
|
|
return fmt.Sprintf("%d B", bytes)
|
|
}
|
|
|
|
div, exp := int64(unit), 0
|
|
|
|
for n := bytes / unit; n >= unit; n /= unit {
|
|
div *= unit
|
|
exp++
|
|
}
|
|
|
|
return fmt.Sprintf("%.1f %cB",
|
|
float64(bytes)/float64(div), "KMGTPE"[exp])
|
|
}
|
|
|
|
func preparePath(path string) string {
|
|
if runtime.GOOS == "windows" {
|
|
return fmt.Sprintf("%s/%s", mediaPrefix, filepath.ToSlash(path))
|
|
}
|
|
|
|
return mediaPrefix + path
|
|
}
|
|
|
|
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 "", err
|
|
}
|
|
|
|
splitPath, err := split(path, regexes)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
splitPath.number = 1
|
|
|
|
switch {
|
|
case sortOrder == "asc":
|
|
path, err = tryExtensions(splitPath, formats)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
case sortOrder == "desc":
|
|
for {
|
|
splitPath.increment()
|
|
|
|
path, err = tryExtensions(splitPath, formats)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if path == "" {
|
|
splitPath.decrement()
|
|
|
|
path, err = tryExtensions(splitPath, formats)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
return path, nil
|
|
}
|
|
|
|
func nextFile(path, sortOrder string, regexes *regexes, formats *types.Types) (string, error) {
|
|
splitPath, err := split(path, regexes)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
switch {
|
|
case sortOrder == "asc":
|
|
splitPath.increment()
|
|
case sortOrder == "desc":
|
|
splitPath.decrement()
|
|
default:
|
|
return "", nil
|
|
}
|
|
|
|
fileName, err := tryExtensions(splitPath, formats)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return fileName, err
|
|
}
|
|
|
|
func split(path string, regexes *regexes) (*splitPath, error) {
|
|
p := splitPath{}
|
|
var err error
|
|
|
|
split := regexes.filename.FindAllStringSubmatch(path, -1)
|
|
|
|
if len(split) < 1 || len(split[0]) < 3 {
|
|
return &splitPath{}, nil
|
|
}
|
|
|
|
p.base = split[0][1]
|
|
|
|
p.number, err = strconv.Atoi(split[0][2])
|
|
if err != nil {
|
|
return &splitPath{}, err
|
|
}
|
|
|
|
p.extension = split[0][3]
|
|
|
|
return &p, nil
|
|
}
|
|
|
|
func tryExtensions(splitPath *splitPath, formats *types.Types) (string, error) {
|
|
var fileName string
|
|
|
|
for extension := range formats.Extensions {
|
|
fileName = fmt.Sprintf("%s%.3d%s", splitPath.base, splitPath.number, extension)
|
|
|
|
exists, err := fileExists(fileName)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if exists {
|
|
return fileName, nil
|
|
}
|
|
}
|
|
|
|
return "", nil
|
|
}
|
|
|
|
func fileExists(path string) (bool, error) {
|
|
_, err := os.Stat(path)
|
|
switch {
|
|
case err == nil:
|
|
return true, nil
|
|
case errors.Is(err, os.ErrNotExist):
|
|
return false, nil
|
|
default:
|
|
return false, err
|
|
}
|
|
}
|
|
|
|
func pathIsValid(path string, paths []string) bool {
|
|
var matchesPrefix = false
|
|
|
|
for i := 0; i < len(paths); i++ {
|
|
if strings.HasPrefix(path, paths[i]) {
|
|
matchesPrefix = true
|
|
}
|
|
}
|
|
|
|
switch {
|
|
case Verbose && !matchesPrefix:
|
|
fmt.Printf("%s | Error: Failed to serve file outside specified path(s): %s\n",
|
|
time.Now().Format(logDate),
|
|
path,
|
|
)
|
|
|
|
return false
|
|
case !matchesPrefix:
|
|
return false
|
|
default:
|
|
return true
|
|
}
|
|
}
|
|
|
|
func pathHasSupportedFiles(path string, formats *types.Types) (bool, error) {
|
|
hasRegisteredFiles := make(chan bool, 1)
|
|
|
|
err := filepath.WalkDir(path, func(p string, info os.DirEntry, err error) error {
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
switch {
|
|
case !Recursive && info.IsDir() && p != path:
|
|
return filepath.SkipDir
|
|
case !info.IsDir() && formats.Validate(p):
|
|
hasRegisteredFiles <- true
|
|
|
|
return filepath.SkipAll
|
|
}
|
|
|
|
return err
|
|
})
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
select {
|
|
case <-hasRegisteredFiles:
|
|
return true, nil
|
|
default:
|
|
return false, nil
|
|
}
|
|
}
|
|
|
|
func pathCount(path string) (int, int, error) {
|
|
var directories = 0
|
|
var files = 0
|
|
|
|
nodes, err := os.ReadDir(path)
|
|
if err != nil {
|
|
return 0, 0, err
|
|
}
|
|
|
|
for _, node := range nodes {
|
|
if node.IsDir() {
|
|
directories++
|
|
} else {
|
|
files++
|
|
}
|
|
}
|
|
|
|
return files, directories, nil
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
switch {
|
|
case !Recursive && info.IsDir() && p != path:
|
|
return filepath.SkipDir
|
|
case !info.IsDir():
|
|
wg.Add(1)
|
|
concurrency.fileScans <- 1
|
|
|
|
go func() {
|
|
defer func() {
|
|
<-concurrency.fileScans
|
|
|
|
wg.Done()
|
|
}()
|
|
|
|
path, err := normalizePath(p)
|
|
if err != nil {
|
|
errorChannel <- err
|
|
}
|
|
|
|
if !formats.Validate(path) {
|
|
stats.filesSkipped = stats.filesSkipped + 1
|
|
|
|
return
|
|
}
|
|
|
|
fileChannel <- path
|
|
|
|
stats.filesMatched = stats.filesMatched + 1
|
|
}()
|
|
case info.IsDir():
|
|
files, directories, err := pathCount(p)
|
|
if err != nil {
|
|
errorChannel <- err
|
|
}
|
|
|
|
if files > 0 && (files < MinimumFileCount) || (files > MaximumFileCount) {
|
|
// This count will not otherwise include the parent directory itself, so increment by one
|
|
stats.directoriesSkipped = stats.directoriesSkipped + directories + 1
|
|
stats.filesSkipped = stats.filesSkipped + files
|
|
|
|
return filepath.SkipDir
|
|
}
|
|
|
|
stats.directoriesMatched = stats.directoriesMatched + 1
|
|
}
|
|
|
|
return err
|
|
})
|
|
|
|
wg.Wait()
|
|
|
|
statChannel <- stats
|
|
|
|
if err != nil {
|
|
errorChannel <- err
|
|
}
|
|
}
|
|
|
|
func scanPaths(paths []string, sort string, cache *fileCache, formats *types.Types) ([]string, error) {
|
|
var list []string
|
|
|
|
fileChannel := make(chan string)
|
|
statChannel := make(chan *scanStats)
|
|
errorChannel := make(chan error)
|
|
done := make(chan bool, 1)
|
|
|
|
stats := &scanStats{
|
|
filesMatched: 0,
|
|
filesSkipped: 0,
|
|
directoriesMatched: 0,
|
|
directoriesSkipped: 0,
|
|
}
|
|
|
|
concurrency := &concurrency{
|
|
directoryScans: make(chan int, maxDirectoryScans),
|
|
fileScans: make(chan int, maxFileScans),
|
|
}
|
|
|
|
var wg sync.WaitGroup
|
|
|
|
startTime := time.Now()
|
|
|
|
for i := 0; i < len(paths); i++ {
|
|
wg.Add(1)
|
|
concurrency.directoryScans <- 1
|
|
|
|
go func(i int) {
|
|
defer func() {
|
|
<-concurrency.directoryScans
|
|
|
|
wg.Done()
|
|
}()
|
|
|
|
scanPath(paths[i], fileChannel, statChannel, errorChannel, concurrency, formats)
|
|
}(i)
|
|
}
|
|
|
|
go func() {
|
|
wg.Wait()
|
|
done <- true
|
|
}()
|
|
|
|
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{}, nil
|
|
}
|
|
|
|
if Verbose {
|
|
fmt.Printf("%s | Indexed %d/%d files across %d/%d directories in %s\n",
|
|
time.Now().Format(logDate),
|
|
stats.filesMatched,
|
|
stats.filesMatched+stats.filesSkipped,
|
|
stats.directoriesMatched,
|
|
stats.directoriesMatched+stats.directoriesSkipped,
|
|
time.Since(startTime),
|
|
)
|
|
}
|
|
|
|
return list, nil
|
|
}
|
|
|
|
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(), nil
|
|
case Cache && !cache.isEmpty() && !filters.isEmpty():
|
|
return filters.apply(cache.List()), nil
|
|
case Cache && cache.isEmpty() && !filters.isEmpty():
|
|
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():
|
|
list, err := scanPaths(paths, sort, cache, formats)
|
|
if err != nil {
|
|
return []string{}, err
|
|
}
|
|
cache.set(list)
|
|
|
|
return cache.List(), nil
|
|
case !Cache && !filters.isEmpty():
|
|
list, err := scanPaths(paths, sort, cache, formats)
|
|
if err != nil {
|
|
return []string{}, err
|
|
}
|
|
|
|
return filters.apply(list), nil
|
|
default:
|
|
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, err := fileList(args, filters, sort, cache, formats)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
fileCount := len(list)
|
|
|
|
if fileCount < 1 {
|
|
return "", ErrNoMediaFound
|
|
}
|
|
|
|
r, err := rand.Int(rand.Reader, big.NewInt(int64(fileCount)))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
val, err := strconv.Atoi(strconv.FormatInt(r.Int64(), 10))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return list[val], nil
|
|
}
|
|
|
|
func normalizePath(path string) (string, error) {
|
|
homeDir, err := os.UserHomeDir()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if path == "~" {
|
|
path = homeDir
|
|
} else if strings.HasPrefix(path, "~/") {
|
|
path = filepath.Join(homeDir, path[2:])
|
|
}
|
|
|
|
path, err = filepath.EvalSymlinks(path)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
absolutePath, err := filepath.Abs(path)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return absolutePath, nil
|
|
}
|
|
|
|
func validatePaths(args []string, formats *types.Types) ([]string, error) {
|
|
var paths []string
|
|
|
|
var pathList strings.Builder
|
|
pathList.WriteString("Paths:\n")
|
|
|
|
for i := 0; i < len(args); i++ {
|
|
path, err := normalizePath(args[i])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
pathMatches := (args[i] == path)
|
|
|
|
hasSupportedFiles, err := pathHasSupportedFiles(path, formats)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var addPath bool = false
|
|
|
|
switch {
|
|
case pathMatches && hasSupportedFiles:
|
|
pathList.WriteString(fmt.Sprintf("%s\n", args[i]))
|
|
addPath = true
|
|
case !pathMatches && hasSupportedFiles:
|
|
pathList.WriteString(fmt.Sprintf("%s (resolved to %s)\n", args[i], path))
|
|
addPath = true
|
|
case pathMatches && !hasSupportedFiles:
|
|
pathList.WriteString(fmt.Sprintf("%s [No supported files found]\n", args[i]))
|
|
case !pathMatches && !hasSupportedFiles:
|
|
pathList.WriteString(fmt.Sprintf("%s (resolved to %s) [No supported files found]\n", args[i], path))
|
|
}
|
|
|
|
if addPath {
|
|
paths = append(paths, path)
|
|
}
|
|
}
|
|
|
|
if len(paths) > 0 {
|
|
fmt.Println(pathList.String())
|
|
}
|
|
|
|
return paths, nil
|
|
}
|