Initial QSfera import

Server/vendor/github.com/gookit/goutil/fsutil/check.go

@@ -0,0 +1,162 @@
+package fsutil
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"path"
+	"path/filepath"
+)
+
+// perm for create dir or file
+var (
+	DefaultDirPerm   os.FileMode = 0775
+	DefaultFilePerm  os.FileMode = 0665
+	OnlyReadFilePerm os.FileMode = 0444
+)
+
+var (
+	// DefaultFileFlags for create and write
+	DefaultFileFlags = os.O_CREATE | os.O_WRONLY | os.O_APPEND
+	// OnlyReadFileFlags open file for read
+	OnlyReadFileFlags = os.O_RDONLY
+)
+
+// alias methods
+var (
+	DirExist  = IsDir
+	FileExist = IsFile
+	PathExist = PathExists
+)
+
+// PathExists reports whether the named file or directory exists.
+func PathExists(path string) bool {
+	if path == "" {
+		return false
+	}
+
+	if _, err := os.Stat(path); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+	}
+	return true
+}
+
+// IsDir reports whether the named directory exists.
+func IsDir(path string) bool {
+	if path == "" || len(path) > 468 {
+		return false
+	}
+
+	if fi, err := os.Stat(path); err == nil {
+		return fi.IsDir()
+	}
+	return false
+}
+
+// FileExists reports whether the named file or directory exists.
+func FileExists(path string) bool {
+	return IsFile(path)
+}
+
+// IsFile reports whether the named file or directory exists.
+//
+// - NOTE: not support symlink file
+func IsFile(path string) bool {
+	if path == "" || len(path) > 468 {
+		return false
+	}
+
+	if fi, err := os.Stat(path); err == nil {
+		return !fi.IsDir()
+	}
+	return false
+}
+
+// IsSymlink reports whether the named file is a symlink.
+func IsSymlink(path string) bool {
+	fi, err := os.Lstat(path)
+	if err != nil {
+		return false
+	}
+	return fi.Mode()&os.ModeSymlink != 0
+}
+
+// IsAbsPath is abs path.
+func IsAbsPath(aPath string) bool {
+	if len(aPath) > 0 {
+		if aPath[0] == '/' {
+			return true
+		}
+		return filepath.IsAbs(aPath)
+	}
+	return false
+}
+
+// IsEmptyDir reports whether the named directory is empty.
+func IsEmptyDir(dirPath string) bool {
+	f, err := os.Open(dirPath)
+	if err != nil {
+		return false
+	}
+	defer f.Close()
+
+	_, err = f.Readdirnames(1)
+	return err == io.EOF
+}
+
+// ImageMimeTypes refer net/http package
+var ImageMimeTypes = map[string]string{
+	"bmp": "image/bmp",
+	"gif": "image/gif",
+	"ief": "image/ief",
+	"jpg": "image/jpeg",
+	// "jpe":  "image/jpeg",
+	"jpeg": "image/jpeg",
+	"png":  "image/png",
+	"svg":  "image/svg+xml",
+	"ico":  "image/x-icon",
+	"webp": "image/webp",
+}
+
+// IsImageFile check file is image file.
+func IsImageFile(path string) bool {
+	mime := MimeType(path)
+	if mime == "" {
+		return false
+	}
+
+	for _, imgMime := range ImageMimeTypes {
+		if imgMime == mime {
+			return true
+		}
+	}
+	return false
+}
+
+// IsZipFile check is zip file.
+// from https://blog.csdn.net/wangshubo1989/article/details/71743374
+func IsZipFile(filepath string) bool {
+	f, err := os.Open(filepath)
+	if err != nil {
+		return false
+	}
+	defer f.Close()
+
+	buf := make([]byte, 4)
+	if n, err := f.Read(buf); err != nil || n < 4 {
+		return false
+	}
+
+	return bytes.Equal(buf, []byte("PK\x03\x04"))
+}
+
+// PathMatch check for a string. alias of path.Match()
+func PathMatch(pattern, s string) bool {
+	ok, err := path.Match(pattern, s)
+	if err != nil {
+		ok = false
+	}
+	return ok
+}