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connection.go
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connection.go
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// Copyright 2015 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 gcsx
import (
"fmt"
"cloud.google.com/go/storage"
"github.com/jacobsa/gcloud/gcs"
"golang.org/x/net/context"
"google.golang.org/api/iterator"
"google.golang.org/api/option"
)
type Connection struct {
wrapped gcs.Conn
gcs *storage.Client
}
func NewConnection(cfg *gcs.ConnConfig) (c *Connection, err error) {
wrapped, err := gcs.NewConn(cfg)
if err != nil {
err = fmt.Errorf("Cannot create Conn: %w", err)
return
}
gcs, err := storage.NewClient(
context.Background(),
option.WithTokenSource(cfg.TokenSource))
if err != nil {
err = fmt.Errorf("Cannot create GCS client: %w", err)
return
}
c = &Connection{
wrapped: wrapped,
gcs: gcs,
}
return
}
func (c *Connection) OpenBucket(
ctx context.Context,
options *gcs.OpenBucketOptions) (b gcs.Bucket, err error) {
b, err = c.wrapped.OpenBucket(ctx, options)
return
}
func (c *Connection) ListBuckets(
ctx context.Context,
projectId string) (names []string, err error) {
it := c.gcs.Buckets(ctx, projectId)
for {
bucket, nextErr := it.Next()
switch nextErr {
case nil:
names = append(names, bucket.Name)
case iterator.Done:
return
default:
err = nextErr
return
}
}
}