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cloudreve/pkg/webdav/file.go

183 lines
4.2 KiB

// Copyright 2014 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package webdav
import (
"context"
"net/http"
"path"
"path/filepath"
model "github.com/cloudreve/Cloudreve/v3/models"
"github.com/cloudreve/Cloudreve/v3/pkg/filesystem"
)
// slashClean is equivalent to but slightly more efficient than
// path.Clean("/" + name).
func slashClean(name string) string {
if name == "" || name[0] != '/' {
name = "/" + name
}
return path.Clean(name)
}
// moveFiles moves files and/or directories from src to dst.
//
// See section 9.9.4 for when various HTTP status codes apply.
func moveFiles(ctx context.Context, fs *filesystem.FileSystem, src FileInfo, dst string, overwrite bool) (status int, err error) {
var (
fileIDs []uint
folderIDs []uint
)
if src.IsDir() {
folderIDs = []uint{src.(*model.Folder).ID}
} else {
fileIDs = []uint{src.(*model.File).ID}
}
if overwrite {
if err := _checkOverwriteFile(ctx, fs, src, dst); err != nil {
return http.StatusInternalServerError, err
}
}
// 判断是否需要移动
if src.GetPosition() != path.Dir(dst) {
err = fs.Move(
ctx,
folderIDs,
fileIDs,
src.GetPosition(),
path.Dir(dst),
)
}
// 判断是否需要重命名
if err == nil && src.GetName() != path.Base(dst) {
err = fs.Rename(
ctx,
folderIDs,
fileIDs,
path.Base(dst),
)
}
if err != nil {
return http.StatusInternalServerError, err
}
return http.StatusNoContent, nil
}
// copyFiles copies files and/or directories from src to dst.
//
// See section 9.8.5 for when various HTTP status codes apply.
func copyFiles(ctx context.Context, fs *filesystem.FileSystem, src FileInfo, dst string, overwrite bool, depth int, recursion int) (status int, err error) {
if recursion == 1000 {
return http.StatusInternalServerError, errRecursionTooDeep
}
recursion++
var (
fileIDs []uint
folderIDs []uint
)
if overwrite {
if err := _checkOverwriteFile(ctx, fs, src, dst); err != nil {
return http.StatusInternalServerError, err
}
}
if src.IsDir() {
folderIDs = []uint{src.(*model.Folder).ID}
} else {
fileIDs = []uint{src.(*model.File).ID}
}
err = fs.Copy(
ctx,
folderIDs,
fileIDs,
src.GetPosition(),
path.Dir(dst),
)
if err != nil {
return http.StatusInternalServerError, err
}
return http.StatusNoContent, nil
}
// 判断目标 文件/夹 是否已经存在,存在则先删除目标文件/夹
func _checkOverwriteFile(ctx context.Context, fs *filesystem.FileSystem, src FileInfo, dst string) error {
if src.IsDir() {
ok, folder := fs.IsPathExist(dst)
if ok {
return fs.Delete(ctx, []uint{folder.ID}, []uint{}, false, false)
}
} else {
ok, file := fs.IsFileExist(dst)
if ok {
return fs.Delete(ctx, []uint{}, []uint{file.ID}, false, false)
}
}
return nil
}
// walkFS traverses filesystem fs starting at name up to depth levels.
//
// Allowed values for depth are 0, 1 or infiniteDepth. For each visited node,
// walkFS calls walkFn. If a visited file system node is a directory and
// walkFn returns filepath.SkipDir, walkFS will skip traversal of this node.
func walkFS(
ctx context.Context,
fs *filesystem.FileSystem,
depth int,
name string,
info FileInfo,
walkFn func(reqPath string, info FileInfo, err error) error) error {
// This implementation is based on Walk's code in the standard path/filepath package.
err := walkFn(name, info, nil)
if err != nil {
if info.IsDir() && err == filepath.SkipDir {
return nil
}
return err
}
if !info.IsDir() || depth == 0 {
return nil
}
if depth == 1 {
depth = 0
}
dirs, _ := info.(*model.Folder).GetChildFolder()
files, _ := info.(*model.Folder).GetChildFiles()
for _, fileInfo := range files {
filename := path.Join(name, fileInfo.Name)
err = walkFS(ctx, fs, depth, filename, &fileInfo, walkFn)
if err != nil {
if !fileInfo.IsDir() || err != filepath.SkipDir {
return err
}
}
}
for _, fileInfo := range dirs {
filename := path.Join(name, fileInfo.Name)
err = walkFS(ctx, fs, depth, filename, &fileInfo, walkFn)
if err != nil {
if !fileInfo.IsDir() || err != filepath.SkipDir {
return err
}
}
}
return nil
}