/
gridfs.go
167 lines (147 loc) · 4.59 KB
/
gridfs.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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
/*
* Copyright © 2016-2022 Iury Braun
* Copyright © 2017-2022 Neo7i
*
* Alt: Id bson.ObjectId ==> id interface{}
*
* https://github.com/ReLaboratory/mulbitchorong-backend/blob/ec0bf74c43db49af18540558ec2033a7520b02d9/handle/upload.go
* https://github.com/c-jimin/codetech/blob/635798468c09fecb3baa86ba037d8a537c0ad2a7/DaoAndModel/file.go
*/
package go_mongodb_dao
import (
"log"
//"time"
"io"
"bufio"
"bytes"
//"net/http"
"context"
"mime/multipart"
//"path/filepath"
"github.com/pkg/errors"
//"fmt"
//"image"
//"image/draw"
//"strconv"
//"image/jpeg"
//"image/color"
//"encoding/base64"
//"os"
//"io"
//"log"
//"bytes"
//"net/http"
//"github.com/nfnt/resize"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo/gridfs"
"go.mongodb.org/mongo-driver/mongo/options"
"github.com/iurybraun/go-mongodb-dao/utils/encoder"
)
const defaultFilesBucket = "fs"
func (m *Dao) CreateGridFSObject(file multipart.File, filename, contentType, path, user string) (interface{}, error) {
//var conn db.Connection
var collection = client.Database(m.Database) //.Collection(m.Collection)
//bucket, err := GetBucket(fileBucket, &conn)
var filesBucket string
if m.Collection != "" {
filesBucket = m.Collection
} else {
filesBucket = defaultFilesBucket
}
bucket, err := gridfs.NewBucket(collection, options.GridFSBucket().SetName(filesBucket))
//defer conn.Client.Disconnect(context.Background())
if err != nil {
return nil, errors.Wrap(err, "upload fail")
}
md5 := encoder.MD5(file)
log.Println(md5)
//"md5": md5, "contentType": contentType,
opts := options.GridFSUpload().SetMetadata(bson.M{"path" : path, "__v" : 0, "user" : user, "group" : nil, "permission" : nil})
uploadStream, uploadStreamErr := bucket.OpenUploadStream(filename, opts)
if uploadStreamErr != nil {
log.Println(uploadStreamErr)
return nil, uploadStreamErr
}
file.Seek(0, 0)
defer uploadStream.Close()
writeErr := WriteToGridFile(file, uploadStream)
if writeErr != nil {
return nil, writeErr
}
fileID := uploadStream.FileID
/* update md5/contentType */
var collectionUpdate = client.Database(m.Database).Collection(filesBucket + ".files")
_, errUpdate := collectionUpdate.UpdateOne(
context.Background(),
bson.M{"_id": fileID},
bson.M{
"$set": bson.M{"md5" : md5, "contentType" : contentType},
},
)
if errUpdate != nil {
return nil, errUpdate
}
/* end update */
return fileID, nil
}
func WriteToGridFile(file multipart.File, uploadStream *gridfs.UploadStream) error {
reader := bufio.NewReader(file)
defer func() { file.Close() }()
buf := make([]byte, 1024)
for {
n, err := reader.Read(buf)
if err != nil && err != io.EOF {
return errors.New("Could not read the input file")
}
if n == 0 {
break
}
if _, err := uploadStream.Write(buf[:n]); err != nil {
return errors.New("Could not write to GridFs")
}
}
uploadStream.Close()
return nil
}
func (m *Dao) ReadGridFSObject(fileID string) (*bytes.Buffer, error) {
//var conn db.Connection
var collection = client.Database(m.Database) //.Collection(m.Collection)
//bucket, err := GetBucket(fileBucket, &conn)
var filesBucket string
if m.Collection != "" {
filesBucket = m.Collection
} else {
filesBucket = defaultFilesBucket
}
bucket, err := gridfs.NewBucket(collection, options.GridFSBucket().SetName(filesBucket))
//defer conn.Client.Disconnect(context.Background())
if err != nil {
return nil, errors.Wrap(err, "getFile fail")
}
var buffer bytes.Buffer
w := bufio.NewWriter(&buffer)
_id, _ := primitive.ObjectIDFromHex(fileID)
if _, err = bucket.DownloadToStream(_id, w); err != nil {
return nil, errors.Wrap(err, "getFile - bucket.DownloadToStream fail")
}
return &buffer, nil
}
func (m *Dao) RemoveGridFSObject(fileID interface{}) error {
var collection = client.Database(m.Database) //.Collection(m.Collection)
var filesBucket string
if m.Collection != "" {
filesBucket = m.Collection
} else {
filesBucket = defaultFilesBucket
}
bucket, err := gridfs.NewBucket(collection, options.GridFSBucket().SetName(filesBucket))
//defer conn.Client.Disconnect(context.Background())
if err != nil {
return errors.Wrap(err, "getFile fail")
}
if err = bucket.Delete(fileID); err != nil {
return errors.Wrap(err, "getFile - bucket.DownloadToStream fail")
}
return nil
}