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80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
4 years ago
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// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fs
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import (
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"bytes"
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"io"
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"net/http"
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"path"
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"path/filepath"
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)
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// Walk walks the file tree rooted at root,
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// calling walkFn for each file or directory in the tree, including root.
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// All errors that arise visiting files and directories are filtered by walkFn.
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//
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// As with filepath.Walk, if the walkFn returns filepath.SkipDir, then the directory is skipped.
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func Walk(hfs http.FileSystem, root string, walkFn filepath.WalkFunc) error {
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dh, err := hfs.Open(root)
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if err != nil {
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return err
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}
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di, err := dh.Stat()
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if err != nil {
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return err
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}
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fis, err := dh.Readdir(-1)
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dh.Close()
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if err = walkFn(root, di, err); err != nil {
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if err == filepath.SkipDir {
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return nil
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}
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return err
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}
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for _, fi := range fis {
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fn := path.Join(root, fi.Name())
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if fi.IsDir() {
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if err = Walk(hfs, fn, walkFn); err != nil {
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if err == filepath.SkipDir {
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continue
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}
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return err
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}
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continue
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}
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if err = walkFn(fn, fi, nil); err != nil {
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if err == filepath.SkipDir {
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continue
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}
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return err
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}
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}
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return nil
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}
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// ReadFile reads the contents of the file of hfs specified by name.
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// Just as ioutil.ReadFile does.
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func ReadFile(hfs http.FileSystem, name string) ([]byte, error) {
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fh, err := hfs.Open(name)
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if err != nil {
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return nil, err
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}
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var buf bytes.Buffer
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_, err = io.Copy(&buf, fh)
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fh.Close()
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return buf.Bytes(), err
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}
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