/
gridfs_bucket_operation_execution.go
138 lines (118 loc) · 3.4 KB
/
gridfs_bucket_operation_execution.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
// Copyright (C) MongoDB, Inc. 2017-present.
//
// 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
package unified
import (
"bytes"
"context"
"encoding/hex"
"fmt"
"io"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/bsontype"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
)
func executeBucketDelete(ctx context.Context, operation *operation) (*operationResult, error) {
bucket, err := entities(ctx).gridFSBucket(operation.Object)
if err != nil {
return nil, err
}
var id *bson.RawValue
elems, _ := operation.Arguments.Elements()
for _, elem := range elems {
key := elem.Key()
val := elem.Value()
switch key {
case "id":
id = &val
default:
return nil, fmt.Errorf("unrecognized bucket delete option %q", key)
}
}
if id == nil {
return nil, newMissingArgumentError("id")
}
return newErrorResult(bucket.Delete(*id)), nil
}
func executeBucketDownload(ctx context.Context, operation *operation) (*operationResult, error) {
bucket, err := entities(ctx).gridFSBucket(operation.Object)
if err != nil {
return nil, err
}
var id *bson.RawValue
elems, _ := operation.Arguments.Elements()
for _, elem := range elems {
key := elem.Key()
val := elem.Value()
switch key {
case "id":
id = &val
default:
return nil, fmt.Errorf("unrecognized bucket download option %q", key)
}
}
if id == nil {
return nil, newMissingArgumentError("id")
}
stream, err := bucket.OpenDownloadStream(*id)
if err != nil {
return newErrorResult(err), nil
}
var buffer bytes.Buffer
if _, err := io.Copy(&buffer, stream); err != nil {
return newErrorResult(err), nil
}
return newValueResult(bsontype.Binary, bsoncore.AppendBinary(nil, 0, buffer.Bytes()), nil), nil
}
func executeBucketUpload(ctx context.Context, operation *operation) (*operationResult, error) {
bucket, err := entities(ctx).gridFSBucket(operation.Object)
if err != nil {
return nil, err
}
var filename string
var fileBytes []byte
opts := options.GridFSUpload()
elems, _ := operation.Arguments.Elements()
for _, elem := range elems {
key := elem.Key()
val := elem.Value()
switch key {
case "chunkSizeBytes":
opts.SetChunkSizeBytes(val.Int32())
case "filename":
filename = val.StringValue()
case "metadata":
opts.SetMetadata(val.Document())
case "source":
fileBytes, err = hex.DecodeString(val.Document().Lookup("$$hexBytes").StringValue())
if err != nil {
return nil, fmt.Errorf("error converting source string to bytes: %v", err)
}
default:
return nil, fmt.Errorf("unrecognized bucket upload option %q", key)
}
}
if filename == "" {
return nil, newMissingArgumentError("filename")
}
if fileBytes == nil {
return nil, newMissingArgumentError("source")
}
fileID, err := bucket.UploadFromStream(filename, bytes.NewReader(fileBytes), opts)
if err != nil {
return newErrorResult(err), nil
}
if operation.ResultEntityID != nil {
fileIDValue := bson.RawValue{
Type: bsontype.ObjectID,
Value: fileID[:],
}
if err := entities(ctx).addBSONEntity(*operation.ResultEntityID, fileIDValue); err != nil {
return nil, fmt.Errorf("error storing result as BSON entity: %v", err)
}
}
return newValueResult(bsontype.ObjectID, fileID[:], nil), nil
}