-
-
Notifications
You must be signed in to change notification settings - Fork 614
/
metainfo.go
132 lines (126 loc) · 3.32 KB
/
metainfo.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
package main
import (
"encoding/hex"
"encoding/json"
"fmt"
"net/http"
"os"
"strings"
"github.com/anacrolix/bargle"
"github.com/bradfitz/iter"
"github.com/anacrolix/torrent/metainfo"
)
type pprintMetainfoFlags struct {
JustName bool
PieceHashes bool
Files bool
}
func metainfoCmd() (cmd bargle.Command) {
var metainfoPath string
var mi *metainfo.MetaInfo
// TODO: Test if bargle treats no subcommand as a failure.
cmd.Positionals = append(cmd.Positionals,
&bargle.Positional{
Name: "torrent file",
Value: &bargle.String{Target: &metainfoPath},
AfterParseFunc: func(ctx bargle.Context) error {
ctx.AfterParse(func() (err error) {
if strings.HasPrefix(metainfoPath, "http://") || strings.HasPrefix(metainfoPath, "https://") {
response, err := http.Get(metainfoPath)
if err != nil {
return nil
}
mi, err = metainfo.Load(response.Body)
if err != nil {
return nil
}
} else {
mi, err = metainfo.LoadFromFile(metainfoPath)
}
return
})
return nil
},
},
bargle.Subcommand{Name: "magnet", Command: func() (cmd bargle.Command) {
cmd.DefaultAction = func() (err error) {
info, err := mi.UnmarshalInfo()
if err != nil {
return
}
fmt.Fprintf(os.Stdout, "%s\n", mi.Magnet(nil, &info).String())
return nil
}
return
}()},
bargle.Subcommand{Name: "pprint", Command: func() (cmd bargle.Command) {
var flags pprintMetainfoFlags
cmd = bargle.FromStruct(&flags)
cmd.DefaultAction = func() (err error) {
err = pprintMetainfo(mi, flags)
if err != nil {
return
}
if !flags.JustName {
os.Stdout.WriteString("\n")
}
return
}
return
}()},
//bargle.Subcommand{Name: "infohash", Command: func(ctx args.SubCmdCtx) (err error) {
// fmt.Printf("%s: %s\n", mi.HashInfoBytes().HexString(), metainfoPath)
// return nil
//}},
//bargle.Subcommand{Name: "list-files", Command: func(ctx args.SubCmdCtx) (err error) {
// info, err := mi.UnmarshalInfo()
// if err != nil {
// return fmt.Errorf("unmarshalling info from metainfo at %q: %v", metainfoPath, err)
// }
// for _, f := range info.UpvertedFiles() {
// fmt.Println(f.DisplayPath(&info))
// }
// return nil
//}},
)
return
}
func pprintMetainfo(metainfo *metainfo.MetaInfo, flags pprintMetainfoFlags) error {
info, err := metainfo.UnmarshalInfo()
if err != nil {
return fmt.Errorf("error unmarshalling info: %s", err)
}
if flags.JustName {
fmt.Printf("%s\n", info.Name)
return nil
}
d := map[string]interface{}{
"Name": info.Name,
"Name.Utf8": info.NameUtf8,
"NumPieces": info.NumPieces(),
"PieceLength": info.PieceLength,
"InfoHash": metainfo.HashInfoBytes().HexString(),
"NumFiles": len(info.UpvertedFiles()),
"TotalLength": info.TotalLength(),
"Announce": metainfo.Announce,
"AnnounceList": metainfo.AnnounceList,
"UrlList": metainfo.UrlList,
}
if len(metainfo.Nodes) > 0 {
d["Nodes"] = metainfo.Nodes
}
if flags.Files {
d["Files"] = info.UpvertedFiles()
}
if flags.PieceHashes {
d["PieceHashes"] = func() (ret []string) {
for i := range iter.N(info.NumPieces()) {
ret = append(ret, hex.EncodeToString(info.Pieces[i*20:(i+1)*20]))
}
return
}()
}
b, _ := json.MarshalIndent(d, "", " ")
_, err = os.Stdout.Write(b)
return err
}