feat: 添加文件驱动和本地驱动实现，支持文件操作功能

pkg/filedriver/local_driver.go

@@ -0,0 +1,74 @@
+package filedriver
+
+import (
+	"github.com/cloudwego/hertz/pkg/app"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+type LocalDriver struct {
+	BasePath string
+}
+
+func NewLocalDriver(driverConfig *DriverConfig) *LocalDriver {
+	return &LocalDriver{
+		BasePath: driverConfig.BasePath,
+	}
+}
+
+func (d *LocalDriver) fullPath(path string) string {
+	return filepath.Join(d.BasePath, path)
+}
+
+func (d *LocalDriver) Save(ctx *app.RequestContext, path string, r io.Reader) error {
+	full := d.fullPath(path)
+	if err := os.MkdirAll(filepath.Dir(full), 0755); err != nil {
+		return err
+	}
+	f, err := os.Create(full)
+	if err != nil {
+		return err
+	}
+	defer func(f *os.File) {
+		err := f.Close()
+		if err != nil {
+
+		}
+	}(f)
+	_, err = io.Copy(f, r)
+	return err
+}
+
+func (d *LocalDriver) Open(ctx *app.RequestContext, path string) (io.ReadCloser, error) {
+	return os.Open(d.fullPath(path))
+}
+
+func (d *LocalDriver) Get(ctx *app.RequestContext, path string) {
+	ctx.File(d.fullPath(path))
+	ctx.Abort()
+}
+
+func (d *LocalDriver) Delete(ctx *app.RequestContext, path string) error {
+	return os.Remove(d.fullPath(path))
+}
+
+func (d *LocalDriver) Stat(ctx *app.RequestContext, path string) (os.FileInfo, error) {
+	return os.Stat(d.fullPath(path))
+}
+
+func (d *LocalDriver) ListDir(ctx *app.RequestContext, path string) ([]os.FileInfo, error) {
+	entries, err := os.ReadDir(d.fullPath(path))
+	if err != nil {
+		return nil, err
+	}
+	infos := make([]os.FileInfo, 0, len(entries))
+	for _, entry := range entries {
+		info, err := entry.Info()
+		if err != nil {
+			return nil, err
+		}
+		infos = append(infos, info)
+	}
+	return infos, nil
+}