-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
net_serve.go
237 lines (198 loc) · 5.46 KB
/
net_serve.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
package blockstore
import (
"bytes"
"context"
"encoding/binary"
block "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid"
ipld "github.com/ipfs/go-ipld-format"
"github.com/libp2p/go-msgio"
cbg "github.com/whyrusleeping/cbor-gen"
"golang.org/x/xerrors"
)
type NetworkStoreHandler struct {
msgStream msgio.ReadWriteCloser
bs Blockstore
}
// NOTE: This code isn't yet hardened to accept untrusted input. See TODOs here and in net.go
func HandleNetBstoreStream(ctx context.Context, bs Blockstore, mss msgio.ReadWriteCloser) *NetworkStoreHandler {
ns := &NetworkStoreHandler{
msgStream: mss,
bs: bs,
}
go ns.handle(ctx)
return ns
}
func (h *NetworkStoreHandler) handle(ctx context.Context) {
defer func() {
if err := h.msgStream.Close(); err != nil {
log.Errorw("error closing blockstore stream", "error", err)
}
}()
for {
var req NetRpcReq
ms, err := h.msgStream.ReadMsg()
if err != nil {
log.Warnw("bstore stream err", "error", err)
return
}
if err := req.UnmarshalCBOR(bytes.NewReader(ms)); err != nil {
return
}
h.msgStream.ReleaseMsg(ms)
switch req.Type {
case NRpcHas:
if len(req.Cid) != 1 {
if err := h.respondError(req.ID, xerrors.New("expected request for 1 cid"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
res, err := h.bs.Has(ctx, req.Cid[0])
if err != nil {
if err := h.respondError(req.ID, err, req.Cid[0]); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
var resData [1]byte
if res {
resData[0] = cbg.CborBoolTrue[0]
} else {
resData[0] = cbg.CborBoolFalse[0]
}
if err := h.respond(req.ID, NRpcOK, resData[:]); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcGet:
if len(req.Cid) != 1 {
if err := h.respondError(req.ID, xerrors.New("expected request for 1 cid"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
err := h.bs.View(ctx, req.Cid[0], func(bdata []byte) error {
return h.respond(req.ID, NRpcOK, bdata)
})
if err != nil {
if err := h.respondError(req.ID, err, req.Cid[0]); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
case NRpcGetSize:
if len(req.Cid) != 1 {
if err := h.respondError(req.ID, xerrors.New("expected request for 1 cid"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
sz, err := h.bs.GetSize(ctx, req.Cid[0])
if err != nil {
if err := h.respondError(req.ID, err, req.Cid[0]); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
var resData [4]byte
binary.LittleEndian.PutUint32(resData[:], uint32(sz))
if err := h.respond(req.ID, NRpcOK, resData[:]); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcPut:
blocks := make([]block.Block, len(req.Cid))
if len(req.Cid) != len(req.Data) {
if err := h.respondError(req.ID, xerrors.New("cid count didn't match data count"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
}
return
}
for i := range req.Cid {
blocks[i], err = block.NewBlockWithCid(req.Data[i], req.Cid[i])
if err != nil {
log.Warnw("make block", "error", err)
return
}
}
err := h.bs.PutMany(ctx, blocks)
if err != nil {
if err := h.respondError(req.ID, err, cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
if err := h.respond(req.ID, NRpcOK, []byte{}); err != nil {
log.Warnw("writing response", "error", err)
return
}
case NRpcDelete:
err := h.bs.DeleteMany(ctx, req.Cid)
if err != nil {
if err := h.respondError(req.ID, err, cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
if err := h.respond(req.ID, NRpcOK, []byte{}); err != nil {
log.Warnw("writing response", "error", err)
return
}
default:
if err := h.respondError(req.ID, xerrors.New("unsupported request type"), cid.Undef); err != nil {
log.Warnw("writing error response", "error", err)
return
}
continue
}
}
}
func (h *NetworkStoreHandler) respondError(req uint64, uerr error, c cid.Cid) error {
var resp NetRpcResp
resp.ID = req
resp.Type = NRpcErr
nerr := NetRpcErr{
Type: NRpcErrGeneric,
Msg: uerr.Error(),
}
if ipld.IsNotFound(uerr) {
nerr.Type = NRpcErrNotFound
nerr.Cid = &c
}
var edata bytes.Buffer
if err := nerr.MarshalCBOR(&edata); err != nil {
return xerrors.Errorf("marshaling error data: %w", err)
}
resp.Data = edata.Bytes()
var msg bytes.Buffer
if err := resp.MarshalCBOR(&msg); err != nil {
return xerrors.Errorf("marshaling error response: %w", err)
}
if err := h.msgStream.WriteMsg(msg.Bytes()); err != nil {
return xerrors.Errorf("write error response: %w", err)
}
return nil
}
func (h *NetworkStoreHandler) respond(req uint64, rt NetRPCRespType, data []byte) error {
var resp NetRpcResp
resp.ID = req
resp.Type = rt
resp.Data = data
var msg bytes.Buffer
if err := resp.MarshalCBOR(&msg); err != nil {
return xerrors.Errorf("marshaling response: %w", err)
}
if err := h.msgStream.WriteMsg(msg.Bytes()); err != nil {
return xerrors.Errorf("write response: %w", err)
}
return nil
}