/
bucket.go
96 lines (88 loc) · 2.63 KB
/
bucket.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// 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 blob
import (
"context"
"os"
"path/filepath"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"go.thethings.network/lorawan-stack/pkg/errors"
"gocloud.dev/blob"
"gocloud.dev/blob/fileblob"
"gocloud.dev/blob/gcsblob"
"gocloud.dev/blob/s3blob"
"gocloud.dev/gcp"
"golang.org/x/oauth2/google"
)
var (
errInvalidConfig = errors.DefineInvalidArgument("invalid_config", "invalid blob store configuration")
)
func Local(_ context.Context, bucket, path string) (*blob.Bucket, error) {
bucketPath, err := filepath.Abs(filepath.Join(path, bucket))
if err != nil {
return nil, err
}
_, err = os.Stat(bucketPath)
if os.IsNotExist(err) {
err = os.MkdirAll(bucketPath, 0755)
if err != nil {
return nil, errInvalidConfig.WithCause(err)
}
} else if err != nil {
return nil, err
}
return fileblob.OpenBucket(bucketPath, nil)
}
func AWS(ctx context.Context, bucket string, conf *aws.Config) (*blob.Bucket, error) {
s, err := session.NewSession(conf)
if err != nil {
return nil, err
}
return s3blob.OpenBucket(ctx, s, bucket, nil)
}
func GCP(ctx context.Context, bucket string, jsonCredentials []byte) (*blob.Bucket, error) {
creds, err := google.CredentialsFromJSON(ctx, jsonCredentials, "https://www.googleapis.com/auth/cloud-platform")
if err != nil {
return nil, err
}
cli, err := gcp.NewHTTPClient(gcp.DefaultTransport(), gcp.CredentialsTokenSource(creds))
if err != nil {
return nil, err
}
return gcsblob.OpenBucket(ctx, cli, bucket, nil)
}
// WriterOptions returns WriterOptions with the given content type and metadata
// from the given key-value pairs.
func WriterOptions(contentType string, kv ...string) *blob.WriterOptions {
opts := &blob.WriterOptions{
ContentType: contentType,
}
if len(kv) > 0 {
if len(kv)%2 != 0 {
panic("Odd number of key-value elements")
}
m := make(map[string]string, len(kv)/2)
var key string
for i, node := range kv {
if i%2 == 0 {
key = node
} else {
m[key] = node
}
}
opts.Metadata = m
}
return opts
}