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restic/vendor/google.golang.org/api/examples/storage.go
2017-08-06 21:47:56 +02:00

79 lines
2.2 KiB
Go

// Copyright 2017 Google Inc. All Rights Reserved.
//
// 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.
package main
import (
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"google.golang.org/api/googleapi"
storage "google.golang.org/api/storage/v1"
)
func init() {
registerDemo("storage", storage.DevstorageReadWriteScope, storageMain)
}
func storageMain(client *http.Client, argv []string) {
if len(argv) != 2 {
fmt.Fprintln(os.Stderr, "Usage: storage filename bucket (to upload an object)")
return
}
service, err := storage.New(client)
if err != nil {
log.Fatalf("Unable to create Storage service: %v", err)
}
filename := argv[0]
bucket := argv[1]
goFile, err := os.Open(filename)
if err != nil {
log.Fatalf("error opening %q: %v", filename, err)
}
storageObject, err := service.Objects.Insert(bucket, &storage.Object{Name: filename}).Media(goFile).Do()
log.Printf("Got storage.Object, err: %#v, %v", storageObject, err)
if err != nil {
return
}
resp, err := service.Objects.Get(bucket, filename).Download()
if err != nil {
log.Fatalf("error downloading %q: %v", filename, err)
}
defer resp.Body.Close()
n, err := io.Copy(ioutil.Discard, resp.Body)
if err != nil {
log.Fatalf("error downloading %q: %v", filename, err)
}
log.Printf("Downloaded %d bytes", n)
// Test If-None-Match - should get a "HTTP 304 Not Modified" response.
obj, err := service.Objects.Get(bucket, filename).IfNoneMatch(storageObject.Etag).Do()
log.Printf("Got obj, err: %#v, %v", obj, err)
if googleapi.IsNotModified(err) {
log.Printf("Success. Object not modified since upload.")
} else {
log.Printf("Error: expected object to not be modified since upload.")
}
}