mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"path"
|
|
"strings"
|
|
|
|
"github.com/chrislusf/weed-fs/go/operation"
|
|
"github.com/chrislusf/weed-fs/go/util"
|
|
)
|
|
|
|
var (
|
|
downloadReplication *string
|
|
downloadDir *string
|
|
)
|
|
|
|
func init() {
|
|
cmdDownload.Run = runDownload // break init cycle
|
|
cmdDownload.IsDebug = cmdDownload.Flag.Bool("debug", false, "verbose debug information")
|
|
server = cmdDownload.Flag.String("server", "localhost:9333", "weedfs master location")
|
|
downloadDir = cmdDownload.Flag.String("dir", ".", "Download the whole folder recursively if specified.")
|
|
}
|
|
|
|
var cmdDownload = &Command{
|
|
UsageLine: "download -server=localhost:9333 -dir=one_directory fid1 [fid2 fid3 ...]",
|
|
Short: "download files by file id",
|
|
Long: `download files by file id.
|
|
|
|
Usually you just need to use curl to lookup the file's volume server, and then download them directly.
|
|
This download tool combine the two steps into one.
|
|
|
|
What's more, if you use "weed upload -maxMB=..." option to upload a big file divided into chunks, you can
|
|
use this tool to download the chunks and merge them automatically.
|
|
|
|
`,
|
|
}
|
|
|
|
func runDownload(cmd *Command, args []string) bool {
|
|
for _, fid := range args {
|
|
filename, content, e := fetchFileId(*server, fid)
|
|
if e != nil {
|
|
fmt.Println("Fetch Error:", e)
|
|
continue
|
|
}
|
|
if filename == "" {
|
|
filename = fid
|
|
}
|
|
if strings.HasSuffix(filename, "-list") {
|
|
filename = filename[0 : len(filename)-len("-list")]
|
|
fids := strings.Split(string(content), "\n")
|
|
f, err := os.OpenFile(path.Join(*downloadDir, filename), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.ModePerm)
|
|
if err != nil {
|
|
fmt.Println("File Creation Error:", e)
|
|
continue
|
|
}
|
|
defer f.Close()
|
|
for _, partId := range fids {
|
|
var n int
|
|
_, part, err := fetchFileId(*server, partId)
|
|
if err == nil {
|
|
n, err = f.Write(part)
|
|
}
|
|
if err == nil && n < len(part) {
|
|
err = io.ErrShortWrite
|
|
}
|
|
if err != nil {
|
|
fmt.Println("File Write Error:", err)
|
|
break
|
|
}
|
|
}
|
|
} else {
|
|
ioutil.WriteFile(path.Join(*downloadDir, filename), content, os.ModePerm)
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func fetchFileId(server string, fileId string) (filename string, content []byte, e error) {
|
|
fileUrl, lookupError := operation.LookupFileId(server, fileId)
|
|
if lookupError != nil {
|
|
return "", nil, lookupError
|
|
}
|
|
filename, content, e = util.DownloadUrl(fileUrl)
|
|
return
|
|
}
|
|
|
|
func WriteFile(filename string, data []byte, perm os.FileMode) error {
|
|
f, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
n, err := f.Write(data)
|
|
f.Close()
|
|
if err == nil && n < len(data) {
|
|
err = io.ErrShortWrite
|
|
}
|
|
return err
|
|
}
|