-
Notifications
You must be signed in to change notification settings - Fork 70
/
boltdbresumer.go
205 lines (181 loc) · 4.66 KB
/
boltdbresumer.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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
// Package boltdbresumer provides a Resumer implementation that uses a Bolt database file as storage.
package boltdbresumer
import (
"encoding/json"
"fmt"
"strconv"
"time"
"github.com/boltdb/bolt"
"github.com/cenkalti/rain/internal/resumer"
)
var Keys = struct {
InfoHash []byte
Port []byte
Name []byte
Trackers []byte
Dest []byte
Info []byte
Bitfield []byte
AddedAt []byte
BytesDownloaded []byte
BytesUploaded []byte
BytesWasted []byte
SeededFor []byte
}{
InfoHash: []byte("info_hash"),
Port: []byte("port"),
Name: []byte("name"),
Trackers: []byte("trackers"),
Dest: []byte("dest"),
Info: []byte("info"),
Bitfield: []byte("bitfield"),
AddedAt: []byte("added_at"),
BytesDownloaded: []byte("bytes_downloaded"),
BytesUploaded: []byte("bytes_uploaded"),
BytesWasted: []byte("bytes_wasted"),
SeededFor: []byte("seeded_for"),
}
type Resumer struct {
db *bolt.DB
mainBucket, subBucket []byte
}
var _ resumer.Resumer = (*Resumer)(nil)
func New(db *bolt.DB, mainBucket, subBucket []byte) (*Resumer, error) {
err := db.Update(func(tx *bolt.Tx) error {
_, err2 := tx.CreateBucketIfNotExists(mainBucket)
return err2
})
if err != nil {
return nil, err
}
return &Resumer{
db: db,
mainBucket: mainBucket,
subBucket: subBucket,
}, nil
}
func (r *Resumer) Write(spec *Spec) error {
port := strconv.Itoa(spec.Port)
trackers, err := json.Marshal(spec.Trackers)
if err != nil {
return err
}
return r.db.Update(func(tx *bolt.Tx) error {
b, err := tx.Bucket(r.mainBucket).CreateBucketIfNotExists(r.subBucket)
if err != nil {
return err
}
b.Put(Keys.InfoHash, spec.InfoHash)
b.Put(Keys.Port, []byte(port))
b.Put(Keys.Name, []byte(spec.Name))
b.Put(Keys.Dest, []byte(spec.Dest))
b.Put(Keys.Trackers, trackers)
b.Put(Keys.Info, spec.Info)
b.Put(Keys.Bitfield, spec.Bitfield)
b.Put(Keys.AddedAt, []byte(spec.AddedAt.Format(time.RFC3339)))
b.Put(Keys.BytesDownloaded, []byte(strconv.FormatInt(spec.BytesDownloaded, 10)))
b.Put(Keys.BytesUploaded, []byte(strconv.FormatInt(spec.BytesUploaded, 10)))
b.Put(Keys.SeededFor, []byte(strconv.FormatInt(spec.BytesWasted, 10)))
return nil
})
}
func (r *Resumer) WriteInfo(value []byte) error {
return r.db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket(r.mainBucket).Bucket(r.subBucket)
if b == nil {
return nil
}
return b.Put(Keys.Info, value)
})
}
func (r *Resumer) WriteBitfield(value []byte) error {
return r.db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket(r.mainBucket).Bucket(r.subBucket)
if b == nil {
return nil
}
return b.Put(Keys.Bitfield, value)
})
}
func (r *Resumer) Read() (*Spec, error) {
var spec *Spec
err := r.db.View(func(tx *bolt.Tx) error {
b := tx.Bucket(r.mainBucket).Bucket(r.subBucket)
if b == nil {
return fmt.Errorf("bucket not found: %q", string(r.subBucket))
}
value := b.Get(Keys.InfoHash)
if value == nil {
return fmt.Errorf("key not found: %q", string(Keys.InfoHash))
}
spec = new(Spec)
spec.InfoHash = make([]byte, len(value))
copy(spec.InfoHash, value)
var err error
value = b.Get(Keys.Port)
spec.Port, err = strconv.Atoi(string(value))
if err != nil {
return err
}
value = b.Get(Keys.Name)
if value != nil {
spec.Name = string(value)
}
value = b.Get(Keys.Trackers)
if value != nil {
err = json.Unmarshal(value, &spec.Trackers)
if err != nil {
return err
}
}
value = b.Get(Keys.Dest)
spec.Dest = string(value)
value = b.Get(Keys.Info)
if value != nil {
spec.Info = make([]byte, len(value))
copy(spec.Info, value)
}
value = b.Get(Keys.Bitfield)
if value != nil {
spec.Bitfield = make([]byte, len(value))
copy(spec.Bitfield, value)
}
value = b.Get(Keys.AddedAt)
if value != nil {
spec.AddedAt, err = time.Parse(time.RFC3339, string(value))
if err != nil {
return err
}
}
value = b.Get(Keys.BytesDownloaded)
if value != nil {
spec.BytesDownloaded, err = strconv.ParseInt(string(value), 10, 64)
if err != nil {
return err
}
}
value = b.Get(Keys.BytesUploaded)
if value != nil {
spec.BytesUploaded, err = strconv.ParseInt(string(value), 10, 64)
if err != nil {
return err
}
}
value = b.Get(Keys.BytesWasted)
if value != nil {
spec.BytesWasted, err = strconv.ParseInt(string(value), 10, 64)
if err != nil {
return err
}
}
value = b.Get(Keys.SeededFor)
if value != nil {
spec.SeededFor, err = time.ParseDuration(string(value))
if err != nil {
return err
}
}
return nil
})
return spec, err
}