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Add blobstore interface and plumb into frontend (uber#1340)
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|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| // Copyright (c) 2017 Uber Technologies, Inc. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
|
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| package blobstore | ||
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| import ( | ||
| "context" | ||
| "errors" | ||
| "io" | ||
| ) | ||
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| // CompressionType defines the type of compression used for a blob | ||
| type CompressionType int | ||
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|
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| const ( | ||
| // NoCompression indicates that blob is not compressed | ||
| NoCompression CompressionType = iota | ||
| ) | ||
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| // Blob defines a blob | ||
| type Blob struct { | ||
| Body io.Reader | ||
| CompressionType CompressionType | ||
| Tags map[string]string | ||
| } | ||
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| // BucketMetadataResponse contains information relating to a bucket's configuration | ||
| type BucketMetadataResponse struct { | ||
| Owner string | ||
| RetentionDays int | ||
| } | ||
|
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| // Client is used to operate on blobs in a blobstore | ||
| type Client interface { | ||
| UploadBlob(ctx context.Context, bucket string, path string, blob *Blob) error | ||
| DownloadBlob(ctx context.Context, bucket string, path string) (*Blob, error) | ||
| BucketMetadata(ctx context.Context, bucket string) (*BucketMetadataResponse, error) | ||
| } | ||
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| type nopClient struct{} | ||
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| func (c *nopClient) UploadBlob(ctx context.Context, bucket string, path string, blob *Blob) error { | ||
| return errors.New("not implemented") | ||
| } | ||
|
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| func (c *nopClient) DownloadBlob(ctx context.Context, bucket string, path string) (*Blob, error) { | ||
| return nil, errors.New("not implemented") | ||
| } | ||
|
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| func (c *nopClient) BucketMetadata(ctx context.Context, bucket string) (*BucketMetadataResponse, error) { | ||
| return nil, errors.New("not implemented") | ||
| } | ||
|
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| // NewNopClient creates a nop client | ||
| func NewNopClient() Client { | ||
| return &nopClient{} | ||
| } |
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