func deleteForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) {
r.ParseForm()
fids := r.Form["fid"]
ret, err := operation.DeleteFiles(masterUrl, fids)
if err != nil {
writeJsonError(w, r, err)
return
}
writeJsonQuiet(w, r, ret)
}
/*
目录元信息存储在内存中而文件的元信息则以 dirId+fileName的方式存储在levelDB中
在删除某个目录时需要每次最多100个的方式读取它的所有的子文件的fid并发送到master上
以从集群中删除
*/
func (filer *FilerEmbedded) DeleteDirectory(dirPath string, recursive bool) (err error) {
dirId, e := filer.directories.FindDirectory(dirPath)
if e != nil {
return e
}
/*
如果有子目录且不是递归删除则出错
*/
if sub_dirs, sub_err := filer.directories.ListDirectories(dirPath); sub_err == nil {
if len(sub_dirs) > 0 && !recursive {
return fmt.Errorf("Fail to delete directory %s: %d sub directories found!", dirPath, len(sub_dirs))
}
//递归删除子目录
for _, sub := range sub_dirs {
if delete_sub_err := filer.DeleteDirectory(filepath.Join(dirPath, sub.Name), recursive); delete_sub_err != nil {
return delete_sub_err
}
}
}
//列出某个目录下的前100个文件
list := filer.files.ListFiles(dirId, "", 100)
if len(list) != 0 && !recursive {
if !recursive {
return fmt.Errorf("Fail to delete non-empty directory %s!", dirPath)
}
}
for {
//文件已经删空
if len(list) == 0 {
return filer.directories.DeleteDirectory(dirPath)
}
//归并文件id
var fids []string
for _, fileEntry := range list {
fids = append(fids, string(fileEntry.Id))
}
/*
从集群中删除文件
*/
if result_list, delete_file_err := operation.DeleteFiles(filer.master, fids); delete_file_err != nil {
return delete_file_err
} else {
if len(result_list.Errors) > 0 {
return errors.New(strings.Join(result_list.Errors, "\n"))
}
}
//下一次读取的头
lastFile := list[len(list)-1]
//再读取100个 直到读完
list = filer.files.ListFiles(dirId, lastFile.Name, 100)
}
}