seaweedfs/go/operation/delete_content.go

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package operation
import (
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"encoding/json"
"errors"
"net/url"
"strings"
"sync"
"github.com/chrislusf/weed-fs/go/util"
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)
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type DeleteResult struct {
Fid string `json:"fid"`
Size int `json:"size"`
Error string `json:"error,omitempty"`
}
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func DeleteFile(master string, fileId string) error {
fileUrl, err := LookupFileId(master, fileId)
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if err != nil {
return err
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}
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return util.Delete(fileUrl)
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}
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func ParseFileId(fid string) (vid string, key_cookie string, err error) {
commaIndex := strings.Index(fid, ",")
if commaIndex <= 0 {
return "", "", errors.New("Wrong fid format.")
}
return fid[:commaIndex], fid[commaIndex+1:], nil
}
type DeleteFilesResult struct {
Errors []string
Results []DeleteResult
}
func DeleteFiles(master string, fileIds []string) (*DeleteFilesResult, error) {
vid_to_fileIds := make(map[string][]string)
ret := &DeleteFilesResult{}
var vids []string
for _, fileId := range fileIds {
vid, _, err := ParseFileId(fileId)
if err != nil {
ret.Results = append(ret.Results, DeleteResult{Fid: vid, Error: err.Error()})
continue
}
if _, ok := vid_to_fileIds[vid]; !ok {
vid_to_fileIds[vid] = make([]string, 0)
vids = append(vids, vid)
}
vid_to_fileIds[vid] = append(vid_to_fileIds[vid], fileId)
}
lookupResults, err := LookupVolumeIds(master, vids)
if err != nil {
return ret, err
}
server_to_fileIds := make(map[string][]string)
for vid, result := range lookupResults {
if result.Error != "" {
ret.Errors = append(ret.Errors, result.Error)
continue
}
for _, location := range result.Locations {
if _, ok := server_to_fileIds[location.Url]; !ok {
server_to_fileIds[location.Url] = make([]string, 0)
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}
server_to_fileIds[location.Url] = append(
server_to_fileIds[location.Url], vid_to_fileIds[vid]...)
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}
}
var wg sync.WaitGroup
for server, fidList := range server_to_fileIds {
wg.Add(1)
go func(server string, fidList []string) {
defer wg.Done()
values := make(url.Values)
for _, fid := range fidList {
values.Add("fid", fid)
}
jsonBlob, err := util.Post("http://"+server+"/delete", values)
if err != nil {
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ret.Errors = append(ret.Errors, err.Error()+" "+string(jsonBlob))
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return
}
var result []DeleteResult
err = json.Unmarshal(jsonBlob, &result)
if err != nil {
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ret.Errors = append(ret.Errors, err.Error()+" "+string(jsonBlob))
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return
}
ret.Results = append(ret.Results, result...)
}(server, fidList)
}
wg.Wait()
return ret, nil
}