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generate_v4_put_object_signed_url.go
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generate_v4_put_object_signed_url.go
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// Copyright 2020 Google LLC
//
// 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
//
// https://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 objects
// [START storage_generate_upload_signed_url_v4]
import (
"fmt"
"io"
"io/ioutil"
"time"
"cloud.google.com/go/storage"
"golang.org/x/oauth2/google"
)
// generateV4PutObjectSignedURL generates object signed URL with PUT method.
func generateV4PutObjectSignedURL(w io.Writer, bucket, object, serviceAccount string) (string, error) {
// bucket := "bucket-name"
// object := "object-name"
// serviceAccount := "service_account.json"
jsonKey, err := ioutil.ReadFile(serviceAccount)
if err != nil {
return "", fmt.Errorf("ioutil.ReadFile: %v", err)
}
conf, err := google.JWTConfigFromJSON(jsonKey)
if err != nil {
return "", fmt.Errorf("google.JWTConfigFromJSON: %v", err)
}
opts := &storage.SignedURLOptions{
Scheme: storage.SigningSchemeV4,
Method: "PUT",
Headers: []string{
"Content-Type:application/octet-stream",
},
GoogleAccessID: conf.Email,
PrivateKey: conf.PrivateKey,
Expires: time.Now().Add(15 * time.Minute),
}
u, err := storage.SignedURL(bucket, object, opts)
if err != nil {
return "", fmt.Errorf("storage.SignedURL: %v", err)
}
fmt.Fprintln(w, "Generated PUT signed URL:")
fmt.Fprintf(w, "%q\n", u)
fmt.Fprintln(w, "You can use this URL with any user agent, for example:")
fmt.Fprintf(w, "curl -X PUT -H 'Content-Type: application/octet-stream' --upload-file my-file %q\n", u)
return u, nil
}
// [END storage_generate_upload_signed_url_v4]