forked from ipfs/kubo
-
Notifications
You must be signed in to change notification settings - Fork 1
/
dag.go
183 lines (160 loc) · 4.26 KB
/
dag.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
package dagcmd
import (
"fmt"
"io"
"io/ioutil"
"strings"
cmds "github.com/ipfs/go-ipfs/commands"
path "github.com/ipfs/go-ipfs/path"
ipldcbor "gx/ipfs/QmNrbCt8j9DT5W9Pmjy2SdudT9k8GpaDr4sRuFix3BXhgR/go-ipld-cbor"
cid "gx/ipfs/QmYhQaCYEcaPPjxJX7YcPcVKkQfRy6sJ7B3XmGFk82XYdQ/go-cid"
node "gx/ipfs/Qmb3Hm9QDFmfYuET4pu7Kyg8JV78jFa1nvZx5vnCZsK4ck/go-ipld-format"
)
var DagCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "Interact with ipld dag objects.",
ShortDescription: `
'ipfs dag' is used for creating and manipulating dag objects.
This subcommand is currently an experimental feature, but it is intended
to deprecate and replace the existing 'ipfs object' command moving forward.
`,
},
Subcommands: map[string]*cmds.Command{
"put": DagPutCmd,
"get": DagGetCmd,
},
}
type OutputObject struct {
Cid *cid.Cid
}
var DagPutCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "Add a dag node to ipfs.",
ShortDescription: `
'ipfs dag put' accepts input from a file or stdin and parses it
into an object of the specified format.
`,
},
Arguments: []cmds.Argument{
cmds.FileArg("object data", true, false, "The object to put").EnableStdin(),
},
Options: []cmds.Option{
cmds.StringOption("format", "f", "Format that the object will be added as.").Default("cbor"),
cmds.StringOption("input-enc", "Format that the input object will be.").Default("json"),
},
Run: func(req cmds.Request, res cmds.Response) {
n, err := req.InvocContext().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
fi, err := req.Files().NextFile()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
ienc, _, _ := req.Option("input-enc").String()
format, _, _ := req.Option("format").String()
switch ienc {
case "json":
nd, err := convertJsonToType(fi, format)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
c, err := n.DAG.Add(nd)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
res.SetOutput(&OutputObject{Cid: c})
return
case "raw":
nd, err := convertRawToType(fi, format)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
c, err := n.DAG.Add(nd)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
res.SetOutput(&OutputObject{Cid: c})
return
default:
res.SetError(fmt.Errorf("unrecognized input encoding: %s", ienc), cmds.ErrNormal)
return
}
},
Type: OutputObject{},
Marshalers: cmds.MarshalerMap{
cmds.Text: func(res cmds.Response) (io.Reader, error) {
oobj, ok := res.Output().(*OutputObject)
if !ok {
return nil, fmt.Errorf("expected a different object in marshaler")
}
return strings.NewReader(oobj.Cid.String()), nil
},
},
}
var DagGetCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "Get a dag node from ipfs.",
ShortDescription: `
'ipfs dag get' fetches a dag node from ipfs and prints it out in the specifed format.
`,
},
Arguments: []cmds.Argument{
cmds.StringArg("ref", true, false, "The object to get").EnableStdin(),
},
Run: func(req cmds.Request, res cmds.Response) {
n, err := req.InvocContext().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
p, err := path.ParsePath(req.Arguments()[0])
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
obj, rem, err := n.Resolver.ResolveToLastNode(req.Context(), p)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
var out interface{} = obj
if len(rem) > 0 {
final, _, err := obj.Resolve(rem)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
out = final
}
res.SetOutput(out)
},
}
func convertJsonToType(r io.Reader, format string) (node.Node, error) {
switch format {
case "cbor", "dag-cbor":
return ipldcbor.FromJson(r)
case "dag-pb", "protobuf":
return nil, fmt.Errorf("protobuf handling in 'dag' command not yet implemented")
default:
return nil, fmt.Errorf("unknown target format: %s", format)
}
}
func convertRawToType(r io.Reader, format string) (node.Node, error) {
switch format {
case "cbor", "dag-cbor":
data, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
return ipldcbor.Decode(data)
default:
return nil, fmt.Errorf("unsupported target format for raw input: %s", format)
}
}