Created

filepathx/filepath.go

@@ -0,0 +1,290 @@
+package filepathx
+
+import (
+	"io/fs"
+	"mime"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"git.cloudyne.io/go/hiscaler-gox/filex"
+	"git.cloudyne.io/go/hiscaler-gox/inx"
+)
+
+const (
+	searchDir = iota
+	searchFile
+)
+
+type WalkOption struct {
+	FilterFunc    func(path string) bool // 自定义函数，返回 true 则会加到列表中，否则忽略。当定义该函数时，将会忽略掉 Except, Only 设置
+	Except        []string               // 排除的文件或者目录（仅当 FilterFunc 未设置时起作用）
+	Only          []string               // 仅仅符合列表中的文件或者目录才会返回（仅当 FilterFunc 未设置时起作用）
+	CaseSensitive bool                   // 区分大小写（作用于 Except 和 Only 设置）
+	Recursive     bool                   // 是否递归查询下级目录
+}
+
+func read(root string, recursive bool, searchType int) []string {
+	dfs := os.DirFS(root)
+	paths := make([]string, 0)
+	if recursive {
+		fs.WalkDir(dfs, ".", func(path string, d fs.DirEntry, err error) error {
+			if err == nil && path != "." && path != ".." &&
+				((searchType == searchDir && d.IsDir()) || (searchType == searchFile && !d.IsDir())) {
+				paths = append(paths, filepath.Join(root, path))
+			}
+			return nil
+		})
+	} else {
+		ds, err := fs.ReadDir(dfs, ".")
+		if err == nil {
+			for _, d := range ds {
+				if d.Name() != "." && d.Name() != ".." &&
+					((searchType == searchDir && d.IsDir()) || (searchType == searchFile && !d.IsDir())) {
+					paths = append(paths, filepath.Join(root, d.Name()))
+				}
+			}
+		}
+	}
+
+	pathPrefix := ""
+	if strings.HasPrefix(root, "..") {
+		pathPrefix = ".."
+	} else if strings.HasPrefix(root, ".") {
+		pathPrefix = "."
+	}
+	if pathPrefix != "" {
+		pathPrefix += string(filepath.Separator)
+		for i, path := range paths {
+			paths[i] = pathPrefix + path
+		}
+	}
+	return paths
+}
+
+func filterPath(path string, opt WalkOption) (ok bool) {
+	if (opt.FilterFunc == nil && len(opt.Only) == 0 && len(opt.Except) == 0) ||
+		(opt.FilterFunc != nil && opt.FilterFunc(path)) {
+		return true
+	}
+
+	if len(opt.Except) > 0 || len(opt.Only) > 0 {
+		name := filepath.Base(path)
+		if len(opt.Except) > 0 {
+			if opt.CaseSensitive {
+				ok = true
+				for _, s := range opt.Except {
+					if s == name {
+						ok = false
+						break
+					}
+				}
+			} else {
+				ok = !inx.StringIn(name, opt.Except...)
+			}
+		}
+		if len(opt.Only) > 0 {
+			if opt.CaseSensitive {
+				for _, s := range opt.Only {
+					if s == name {
+						ok = true
+						break
+					}
+				}
+			} else {
+				ok = inx.StringIn(name, opt.Only...)
+			}
+		}
+	}
+	return
+}
+
+// Dirs 获取指定目录下的所有目录
+func Dirs(root string, opt WalkOption) []string {
+	dirs := make([]string, 0)
+	paths := read(root, opt.Recursive, searchDir)
+	if len(paths) > 0 {
+		for _, path := range paths {
+			if filterPath(path, opt) && !strings.EqualFold(path, root) {
+				dirs = append(dirs, path)
+			}
+		}
+	}
+	return dirs
+}
+
+// Files 获取指定目录下的所有文件
+func Files(root string, opt WalkOption) []string {
+	files := make([]string, 0)
+	paths := read(root, opt.Recursive, searchFile)
+	if len(paths) > 0 {
+		for _, path := range paths {
+			if filterPath(path, opt) {
+				files = append(files, path)
+			}
+		}
+	}
+	return files
+}
+
+// GenerateDirNames 生成目录名
+func GenerateDirNames(s string, n, level int, caseSensitive bool) []string {
+	if s == "" {
+		return []string{}
+	}
+
+	isValidCharFunc := func(r rune) bool {
+		return 'A' <= r && r <= 'Z' || 'a' <= r && r <= 'z' || '0' <= r && r <= '9'
+	}
+	var b strings.Builder
+	for _, r := range s {
+		if isValidCharFunc(r) {
+			b.WriteRune(r)
+		}
+	}
+	if b.Len() == 0 {
+		return []string{}
+	}
+
+	s = b.String() // Clean s string
+	if !caseSensitive {
+		s = strings.ToLower(s)
+	}
+	if n <= 0 {
+		return []string{s}
+	}
+
+	if level <= 0 {
+		level = 1
+	}
+	names := make([]string, 0)
+	sLen := len(s)
+	for i := 0; i < sLen; i += n {
+		if len(names) == level {
+			break
+		}
+
+		lastIndex := i + n
+		if lastIndex >= sLen {
+			lastIndex = sLen
+		}
+		names = append(names, s[i:lastIndex])
+	}
+	return names
+}
+
+// Ext 获取资源扩展名
+func Ext(path string, b []byte) string {
+	if path == "" && b == nil {
+		return ""
+	}
+
+	if b == nil && filex.Exists(path) {
+		if b1, err := os.ReadFile(path); err == nil {
+			b = b1[:512]
+		}
+	}
+	ext := ""
+	if b != nil {
+		contentType := http.DetectContentType(b)
+		// https://developer.mozilla.org/zh-CN/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types
+		extTypes := map[string][]string{
+			".aac": {"audio/aac"},
+			".abw": {"application/x-abiword"},
+			".arc": {"application/x-freearc"},
+			".avi": {"video/x-msvideo"},
+			".azw": {"application/vnd.amazon.ebook"},
+			// ".bin": {"application/octet-stream"},
+			".bmp":    {"image/bmp"},
+			".bz":     {"application/x-bzip"},
+			".bz2":    {"application/x-bzip2"},
+			".csh":    {"application/x-csh"},
+			".css":    {"text/css"},
+			".csv":    {"text/csv"},
+			".doc":    {"application/msword"},
+			".docx":   {"application/vnd.openxmlformats-officedocument.wordprocessingml.document"},
+			".eot":    {"application/vnd.ms-fontobject"},
+			".epub":   {"application/epub+zip"},
+			".gif":    {"image/gif"},
+			".htm":    {"text/html"},
+			".html":   {"text/html"},
+			".ico":    {"image/vnd.microsoft.icon"},
+			".ics":    {"text/calendar"},
+			".jar":    {"application/java-archive"},
+			".jpg":    {"image/jpeg"},
+			".jpeg":   {"image/jpeg"},
+			".js":     {"text/javascript"},
+			".json":   {"application/json"},
+			".jsonld": {"application/ld+json"},
+			".mid":    {"audio/midi", "audio/x-midi"},
+			".midi":   {"audio/midi", "audio/x-midi"},
+			".mjs":    {"text/javascript"},
+			".mp3":    {"audio/mpeg"},
+			".mpeg":   {"video/mpeg"},
+			".mpkg":   {"application/vnd.apple.installer+xml"},
+			".odp":    {"application/vnd.oasis.opendocument.presentation"},
+			".ods":    {"application/vnd.oasis.opendocument.spreadsheet"},
+			".odt":    {"application/vnd.oasis.opendocument.text"},
+			".oga":    {"audio/ogg"},
+			".ogv":    {"video/ogg"},
+			".ogx":    {"application/ogg"},
+			".otf":    {"font/otf"},
+			".png":    {"image/png"},
+			".pdf":    {"application/pdf"},
+			".ppt":    {"application/vnd.ms-powerpoint"},
+			".pptx":   {"application/vnd.openxmlformats-officedocument.presentationml.presentation"},
+			".rar":    {"application/x-rar-compressed"},
+			".rtf":    {"application/rtf"},
+			".sh":     {"application/x-sh"},
+			".svg":    {"image/svg+xml"},
+			".swf":    {"application/x-shockwave-flash"},
+			".tar":    {"application/x-tar"},
+			".tif":    {"image/tiff"},
+			".tiff":   {"image/tiff"},
+			".ttf":    {"font/ttf"},
+			".txt":    {"text/plain"},
+			".vsd":    {"application/vnd.visio"},
+			".wav":    {"audio/wav"},
+			".weba":   {"audio/webm"},
+			".webm":   {"video/webm"},
+			".webp":   {"image/webp"},
+			".woff":   {"font/woff"},
+			".woff2":  {"font/woff2"},
+			".xhtml":  {"application/xhtml+xml"},
+			".xls":    {"application/vnd.ms-excel"},
+			".xlsx":   {"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
+			".xml":    {"application/xml", "text/xml"},
+			".xul":    {"application/vnd.mozilla.xul+xml"},
+			".zip":    {"application/zip"},
+			".3gp":    {"video/3gpp", "audio/3gpp"},
+			".3g2":    {"video/3gpp2", "audio/3gpp2"},
+			".7z":     {"application/x-7z-compressed"},
+		}
+		for k, types := range extTypes {
+			for _, v := range types {
+				mime.AddExtensionType(k, v)
+			}
+		}
+		if extensions, err := mime.ExtensionsByType(contentType); err == nil && extensions != nil {
+			n := len(extensions)
+			if n == 1 {
+				ext = extensions[0]
+			} else {
+				typeExt := map[string]string{
+					"text/plain; charset=utf-8": ".txt",
+					"image/jpeg":                ".jpg",
+				}
+				if v, exists := typeExt[contentType]; exists {
+					ext = v
+				} else {
+					ext = extensions[0]
+				}
+			}
+		}
+	}
+	if ext == "" {
+		ext = filepath.Ext(path)
+	}
+	return ext
+}