Initial commit

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pub/common/utils/file.go

@@ -0,0 +1,56 @@
+package utils
+
+import "os"
+
+// CreateEmptyFile 创建一个固定size大小的空文件
+// 如果seek文件失败，则删除文件，并返回错误信息
+func CreateEmptyFile(name string, size int64) (f *os.File, err error) {
+	defer func() {
+		if err != nil && f != nil {
+			f.Close()
+			os.Remove(name)
+		}
+	}()
+	f, err = os.OpenFile(name, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
+	if err != nil {
+		return
+	}
+	if _, err = f.Seek(size-1, 0); err != nil {
+		return
+	}
+	_, err = f.Write([]byte{0})
+	return
+}
+
+func WriteFile(data []byte, filename string) (err error) {
+	defer func() {
+		if err != nil {
+			os.Remove(filename)
+		}
+	}()
+
+	pi := PathForInfo(filename)
+	if pi.Dir != "" {
+		if err = os.MkdirAll(pi.Dir, 0755); err != nil {
+			return
+		}
+	}
+
+	f, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0666)
+	if err != nil {
+		return
+	}
+	_, err = f.Write(data)
+	f.Close()
+	return
+}
+func PathExists(path string) (bool, error) {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}