mirror of
https://github.com/octoleo/restic.git
synced 2024-11-14 17:24:10 +00:00
135 lines
2.9 KiB
Go
135 lines
2.9 KiB
Go
// Copyright 2017, Google
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// This is a simple program that will copy named files into or out of B2.
|
|
//
|
|
// To copy a file into B2:
|
|
//
|
|
// B2_ACCOUNT_ID=foo B2_ACCOUNT_KEY=bar simple /path/to/file b2://bucket/path/to/dst
|
|
//
|
|
// To copy a file out:
|
|
//
|
|
// B2_ACCOUNT_ID=foo B2_ACCOUNT_KEY=bar simple b2://bucket/path/to/file /path/to/dst
|
|
package main
|
|
|
|
import (
|
|
"context"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"net/url"
|
|
"os"
|
|
"strings"
|
|
|
|
"github.com/kurin/blazer/b2"
|
|
)
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
b2id := os.Getenv("B2_ACCOUNT_ID")
|
|
b2key := os.Getenv("B2_ACCOUNT_KEY")
|
|
|
|
args := flag.Args()
|
|
if len(args) != 2 {
|
|
fmt.Printf("Usage:\n\nsimple [src] [dst]\n")
|
|
return
|
|
}
|
|
src, dst := args[0], args[1]
|
|
|
|
ctx := context.Background()
|
|
c, err := b2.NewClient(ctx, b2id, b2key)
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
return
|
|
}
|
|
|
|
var r io.ReadCloser
|
|
var w io.WriteCloser
|
|
|
|
if strings.HasPrefix(src, "b2://") {
|
|
reader, err := b2Reader(ctx, c, src)
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
return
|
|
}
|
|
r = reader
|
|
} else {
|
|
f, err := os.Open(src)
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
return
|
|
}
|
|
r = f
|
|
}
|
|
// Readers do not need their errors checked on close. (Also it's a little
|
|
// silly to defer this in main(), but.)
|
|
defer r.Close()
|
|
|
|
if strings.HasPrefix(dst, "b2://") {
|
|
writer, err := b2Writer(ctx, c, dst)
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
return
|
|
}
|
|
w = writer
|
|
} else {
|
|
f, err := os.Create(dst)
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
return
|
|
}
|
|
w = f
|
|
}
|
|
|
|
// Copy and check error.
|
|
if _, err := io.Copy(w, r); err != nil {
|
|
fmt.Println(err)
|
|
return
|
|
}
|
|
|
|
// It is very important to check the error of the writer.
|
|
if err := w.Close(); err != nil {
|
|
fmt.Println(err)
|
|
}
|
|
}
|
|
|
|
func b2Reader(ctx context.Context, c *b2.Client, path string) (io.ReadCloser, error) {
|
|
o, err := b2Obj(ctx, c, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return o.NewReader(ctx), nil
|
|
}
|
|
|
|
func b2Writer(ctx context.Context, c *b2.Client, path string) (io.WriteCloser, error) {
|
|
o, err := b2Obj(ctx, c, path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return o.NewWriter(ctx), nil
|
|
}
|
|
|
|
func b2Obj(ctx context.Context, c *b2.Client, path string) (*b2.Object, error) {
|
|
uri, err := url.Parse(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
bucket, err := c.Bucket(ctx, uri.Host)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// B2 paths must not begin with /, so trim it here.
|
|
return bucket.Object(strings.TrimPrefix(uri.Path, "/")), nil
|
|
}
|