forked from keybase/client
/
utils.go
344 lines (307 loc) · 8.34 KB
/
utils.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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
package attachments
import (
"bufio"
"bytes"
"errors"
"image/gif"
"image/png"
"io"
"os"
"strings"
"sync/atomic"
"time"
"github.com/keybase/client/go/chat/globals"
"github.com/keybase/client/go/libkb"
"github.com/keybase/client/go/protocol/chat1"
"github.com/keybase/client/go/protocol/gregor1"
"github.com/keybase/client/go/protocol/keybase1"
"github.com/keybase/go-framed-msgpack-rpc/rpc"
"golang.org/x/net/context"
)
func AssetFromMessage(ctx context.Context, g *globals.Context, uid gregor1.UID, convID chat1.ConversationID,
msgID chat1.MessageID, preview bool) (res chat1.Asset, err error) {
reason := chat1.GetThreadReason_GENERAL
msgs, err := g.ChatHelper.GetMessages(ctx, uid, convID, []chat1.MessageID{msgID}, true, &reason)
if err != nil {
return res, err
}
if len(msgs) == 0 {
return res, libkb.NotFoundError{}
}
first := msgs[0]
st, err := first.State()
if err != nil {
return res, err
}
if st == chat1.MessageUnboxedState_ERROR {
em := first.Error().ErrMsg
return res, errors.New(em)
}
if st != chat1.MessageUnboxedState_VALID {
// given a message id that doesn't exist, msgs can come back
// with an empty message in it (and st == 0).
// this check prevents a panic, but perhaps the server needs
// a fix as well.
return res, libkb.NotFoundError{}
}
msg := first.Valid()
body := msg.MessageBody
t, err := body.MessageType()
if err != nil {
return res, err
}
var attachment chat1.MessageAttachment
switch t {
case chat1.MessageType_ATTACHMENT:
attachment = msg.MessageBody.Attachment()
case chat1.MessageType_ATTACHMENTUPLOADED:
uploaded := msg.MessageBody.Attachmentuploaded()
attachment = chat1.MessageAttachment{
Object: uploaded.Object,
Previews: uploaded.Previews,
Metadata: uploaded.Metadata,
}
default:
return res, errors.New("not an attachment message")
}
res = attachment.Object
if preview {
if len(attachment.Previews) > 0 {
res = attachment.Previews[0]
} else if attachment.Preview != nil {
res = *attachment.Preview
} else {
return res, errors.New("no preview in attachment")
}
}
return res, nil
}
// ReadCloseResetter is io.ReadCloser plus a Reset method. This is used by
// attachment uploads.
type ReadCloseResetter interface {
io.ReadCloser
Reset() error
}
type FileReadCloseResetter struct {
filename string
file *os.File
buf *bufio.Reader
}
// NewFileReadCloseResetter creates a ReadCloseResetter that uses an on-disk file as
// source of data.
func NewFileReadCloseResetter(name string) (ReadCloseResetter, error) {
f := &FileReadCloseResetter{filename: name}
if err := f.open(); err != nil {
return nil, err
}
return f, nil
}
func (f *FileReadCloseResetter) open() error {
ff, err := os.Open(f.filename)
if err != nil {
return err
}
f.file = ff
f.buf = bufio.NewReader(f.file)
return nil
}
func (f *FileReadCloseResetter) Read(p []byte) (int, error) {
return f.buf.Read(p)
}
func (f *FileReadCloseResetter) Reset() error {
_, err := f.file.Seek(0, io.SeekStart)
if err != nil {
return err
}
f.buf.Reset(f.file)
return nil
}
func (f *FileReadCloseResetter) Close() error {
f.buf = nil
if f.file != nil {
return f.file.Close()
}
return nil
}
// KbfsReadCloseResetter is an implementation of ReadCloseResetter that uses
// SimpleFS as source of data.
type KbfsReadCloseResetter struct {
client *keybase1.SimpleFSClient
opid keybase1.OpID
offset int64
ctx context.Context
}
const (
kbfsPrefix = "/keybase"
kbfsPrefixPrivate = kbfsPrefix + "/private/"
kbfsPrefixPublic = kbfsPrefix + "/public/"
kbfsPrefixTeam = kbfsPrefix + "/team/"
)
func isKbfsPath(p string) bool {
return strings.HasPrefix(p, kbfsPrefixPrivate) ||
strings.HasPrefix(p, kbfsPrefixPublic) ||
strings.HasPrefix(p, kbfsPrefixTeam)
}
func makeSimpleFSClientFromGlobalContext(
g *libkb.GlobalContext) (*keybase1.SimpleFSClient, error) {
xp := g.ConnectionManager.LookupByClientType(keybase1.ClientType_KBFS)
if xp == nil {
return nil, libkb.KBFSNotRunningError{}
}
return &keybase1.SimpleFSClient{
Cli: rpc.NewClient(xp, libkb.NewContextifiedErrorUnwrapper(g), nil),
}, nil
}
// NewKbfsReadCloseResetter creates a ReadCloseResetter that uses SimpleFS as source
// of data. kbfsPath must start with "/keybase/<tlf-type>/".
func NewKbfsReadCloseResetter(ctx context.Context, g *libkb.GlobalContext,
kbfsPath string) (ReadCloseResetter, error) {
if !isKbfsPath(kbfsPath) {
return nil, errors.New("not a kbfs path")
}
client, err := makeSimpleFSClientFromGlobalContext(g)
if err != nil {
return nil, err
}
opid, err := client.SimpleFSMakeOpid(ctx)
if err != nil {
return nil, err
}
if err = client.SimpleFSOpen(ctx, keybase1.SimpleFSOpenArg{
OpID: opid,
Dest: keybase1.NewPathWithKbfsPath(kbfsPath[len(kbfsPrefix):]),
Flags: keybase1.OpenFlags_READ | keybase1.OpenFlags_EXISTING,
}); err != nil {
return nil, err
}
return &KbfsReadCloseResetter{
client: client,
ctx: ctx,
opid: opid,
}, nil
}
// Read implements the ReadCloseResetter interface.
func (f *KbfsReadCloseResetter) Read(p []byte) (int, error) {
content, err := f.client.SimpleFSRead(f.ctx, keybase1.SimpleFSReadArg{
OpID: f.opid,
Offset: atomic.LoadInt64(&f.offset),
Size: len(p),
})
if err != nil {
return 0, err
}
if len(content.Data) == 0 {
// Unfortunately SimpleFSRead doesn't return EOF error.
return 0, io.EOF
}
atomic.AddInt64(&f.offset, int64(len(content.Data)))
copy(p, content.Data)
return len(content.Data), nil
}
// Reset implements the ReadCloseResetter interface.
func (f *KbfsReadCloseResetter) Reset() error {
atomic.StoreInt64(&f.offset, 0)
return nil
}
// Close implements the ReadCloseResetter interface.
func (f *KbfsReadCloseResetter) Close() error {
return f.client.SimpleFSClose(f.ctx, f.opid)
}
// NewReadCloseResetter creates a ReadCloseResetter using either on-disk file
// or SimpleFS depending on if p is a KBFS path.
func NewReadCloseResetter(ctx context.Context, g *libkb.GlobalContext,
p string) (ReadCloseResetter, error) {
if isKbfsPath(p) {
return NewKbfsReadCloseResetter(ctx, g, p)
}
return NewFileReadCloseResetter(p)
}
type kbfsFileInfo struct {
dirent *keybase1.Dirent
}
func (fi kbfsFileInfo) Name() string { return fi.dirent.Name }
func (fi kbfsFileInfo) Size() int64 { return int64(fi.dirent.Size) }
func (fi kbfsFileInfo) Mode() (mode os.FileMode) {
mode |= 0400
if fi.dirent.Writable {
mode |= 0200
}
switch fi.dirent.DirentType {
case keybase1.DirentType_DIR:
mode |= os.ModeDir
case keybase1.DirentType_SYM:
mode |= os.ModeSymlink
case keybase1.DirentType_EXEC:
mode |= 0100
}
return mode
}
func (fi kbfsFileInfo) ModTime() time.Time {
return keybase1.FromTime(fi.dirent.Time)
}
func (fi kbfsFileInfo) IsDir() bool {
return fi.dirent.DirentType == keybase1.DirentType_DIR
}
func (fi kbfsFileInfo) Sys() interface{} { return fi.dirent }
// StatOSOrKbfsFile stats the file located at p, using SimpleFSStat if it's a
// KBFS path, or os.Stat if not.
func StatOSOrKbfsFile(ctx context.Context, g *libkb.GlobalContext, p string) (
fi os.FileInfo, err error) {
if !isKbfsPath(p) {
return os.Stat(p)
}
client, err := makeSimpleFSClientFromGlobalContext(g)
if err != nil {
return nil, err
}
dirent, err := client.SimpleFSStat(ctx, keybase1.SimpleFSStatArg{
Path: keybase1.NewPathWithKbfsPath(p[len(kbfsPrefix):]),
})
if err != nil {
return nil, err
}
return kbfsFileInfo{dirent: &dirent}, nil
}
type BufReadResetter struct {
buf []byte
r *bytes.Reader
}
func NewBufReadResetter(buf []byte) *BufReadResetter {
return &BufReadResetter{
buf: buf,
r: bytes.NewReader(buf),
}
}
func (b *BufReadResetter) Read(p []byte) (int, error) {
return b.r.Read(p)
}
func (b *BufReadResetter) Reset() error {
b.r.Reset(b.buf)
return nil
}
func AddPendingPreview(ctx context.Context, g *globals.Context, obr *chat1.OutboxRecord) error {
pre, err := NewPendingPreviews(g).Get(ctx, obr.OutboxID)
if err != nil {
return err
}
mpr, err := pre.Export(func() *chat1.PreviewLocation {
loc := chat1.NewPreviewLocationWithUrl(g.AttachmentURLSrv.GetPendingPreviewURL(ctx,
obr.OutboxID))
return &loc
})
if err != nil {
return err
}
obr.Preview = &mpr
return nil
}
func GIFToPNG(ctx context.Context, src io.Reader, dest io.Writer) error {
g, err := gif.DecodeAll(src)
if err != nil {
return err
}
if len(g.Image) == 0 {
return errors.New("no frames in gif")
}
return png.Encode(dest, g.Image[0])
}