mirror of https://github.com/perkeep/perkeep.git
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
/*
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Copyright 2014 The Perkeep Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package mongo
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import (
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"context"
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"io"
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"io/ioutil"
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"perkeep.org/pkg/blob"
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"gopkg.in/mgo.v2"
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)
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const (
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// This error code is returned by mongo when a unique key violation occurs when inserting
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// See: http://www.mongodb.org/about/contributors/error-codes/
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mgoUniqueKeyErr = 11000
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)
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func (m *mongoStorage) ReceiveBlob(ctx context.Context, ref blob.Ref, source io.Reader) (blob.SizedRef, error) {
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blobData, err := ioutil.ReadAll(source)
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if err != nil {
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return blob.SizedRef{}, err
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}
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b := blobDoc{Key: ref.String(), Blob: blobData, Size: uint32(len(blobData))}
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if err = m.c.Insert(b); err != nil {
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// Unique key violation?
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// Then the blob already exists, no need to throw an error
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if mongoErr, isMongoErr := err.(*mgo.LastError); isMongoErr && mongoErr.Code == mgoUniqueKeyErr {
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return blob.SizedRef{Ref: ref, Size: b.Size}, nil
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}
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return blob.SizedRef{}, err
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}
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return blob.SizedRef{Ref: ref, Size: b.Size}, nil
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}
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