-
Notifications
You must be signed in to change notification settings - Fork 187
/
context.go
279 lines (228 loc) · 5.97 KB
/
context.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
package grpc_context
import (
"context"
"fmt"
"net"
"sync"
"time"
"github.com/google/uuid"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/peer"
"github.com/eolinker/eosc/utils/config"
"google.golang.org/grpc"
"github.com/eolinker/eosc/eocontext"
grpc_context "github.com/eolinker/eosc/eocontext/grpc-context"
)
var _ grpc_context.IGrpcContext = (*Context)(nil)
var (
pool = sync.Pool{
New: newContext,
}
)
func newContext() interface{} {
h := new(Context)
return h
}
type Context struct {
ctx context.Context
cancel context.CancelFunc
serverStream grpc.ServerStream
addr net.Addr
srv interface{}
acceptTime time.Time
requestId string
request grpc_context.IRequest
proxy grpc_context.IRequest
response grpc_context.IResponse
completeHandler eocontext.CompleteHandler
finishHandler eocontext.FinishHandler
app eocontext.EoApp
balance eocontext.BalanceHandler
upstreamHostHandler eocontext.UpstreamHostHandler
labels map[string]string
tls bool
insecureCertificateVerify bool
port int
finish bool
errChan chan error
}
func (c *Context) RealIP() string {
if c.request != nil {
return c.request.RealIP()
}
return ""
}
func (c *Context) EnableTls(b bool) {
c.tls = b
}
func (c *Context) InsecureCertificateVerify(b bool) {
c.insecureCertificateVerify = b
}
func NewContext(srv interface{}, stream grpc.ServerStream) *Context {
now := time.Now()
ctx, cancel := context.WithCancel(stream.Context())
var addr net.Addr = zeroTCPAddr
p, has := peer.FromContext(ctx)
if has {
addr = p.Addr
}
newCtx := &Context{
requestId: uuid.New().String(),
ctx: ctx,
cancel: cancel,
addr: addr,
srv: srv,
serverStream: stream,
request: NewRequest(stream),
proxy: NewRequest(stream),
response: NewResponse(),
labels: map[string]string{},
errChan: make(chan error),
}
newCtx.WithValue("request_time", now)
return newCtx
}
func (c *Context) RequestId() string {
return c.requestId
}
func (c *Context) AcceptTime() time.Time {
return c.acceptTime
}
func (c *Context) Context() context.Context {
return c.ctx
}
func (c *Context) Value(key interface{}) interface{} {
return c.ctx.Value(key)
}
func (c *Context) WithValue(key, val interface{}) {
c.ctx = context.WithValue(c.ctx, key, val)
}
func (c *Context) Scheme() string {
return "grpc"
}
func (c *Context) Assert(i interface{}) error {
if v, ok := i.(*grpc_context.IGrpcContext); ok {
*v = c
return nil
}
return fmt.Errorf("not suport:%s", config.TypeNameOf(i))
}
func (c *Context) SetLabel(name, value string) {
c.labels[name] = value
}
func (c *Context) GetLabel(name string) string {
return c.labels[name]
}
func (c *Context) Labels() map[string]string {
return c.labels
}
func (c *Context) GetComplete() eocontext.CompleteHandler {
return c.completeHandler
}
func (c *Context) SetCompleteHandler(handler eocontext.CompleteHandler) {
c.completeHandler = handler
}
func (c *Context) GetFinish() eocontext.FinishHandler {
return c.finishHandler
}
func (c *Context) SetFinish(handler eocontext.FinishHandler) {
c.finishHandler = handler
}
func (c *Context) GetBalance() eocontext.BalanceHandler {
return c.balance
}
func (c *Context) SetBalance(handler eocontext.BalanceHandler) {
c.balance = handler
}
func (c *Context) GetUpstreamHostHandler() eocontext.UpstreamHostHandler {
return c.upstreamHostHandler
}
func (c *Context) SetUpstreamHostHandler(handler eocontext.UpstreamHostHandler) {
c.upstreamHostHandler = handler
}
func (c *Context) LocalIP() net.IP {
return addrToIP(c.addr)
}
func (c *Context) LocalAddr() net.Addr {
return c.addr
}
func (c *Context) LocalPort() int {
return c.port
}
func (c *Context) Request() grpc_context.IRequest {
return c.request
}
func (c *Context) Proxy() grpc_context.IRequest {
return c.proxy
}
func (c *Context) Response() grpc_context.IResponse {
return c.response
}
func (c *Context) SetResponse(response grpc_context.IResponse) {
c.response = response
}
func (c *Context) Invoke(node eocontext.INode, timeout time.Duration) error {
err := c.doInvoke(node.Addr(), timeout)
if err != nil {
node.Down()
return err
}
return nil
}
func (c *Context) doInvoke(address string, timeout time.Duration) error {
passHost, targetHost := c.GetUpstreamHostHandler().PassHost()
switch passHost {
case eocontext.NodeHost:
c.proxy.SetHost(address)
case eocontext.ReWriteHost:
c.proxy.SetHost(targetHost)
}
clientConn, err := clientPool.Get(address, c.tls, c.proxy.Host()).Get()
if err != nil {
return err
}
c.proxy.Headers().Set("grpc-timeout", fmt.Sprintf("%dn", timeout))
clientCtx, _ := context.WithCancel(metadata.NewOutgoingContext(c.Context(), c.proxy.Headers().Copy()))
clientStream, err := grpc.NewClientStream(clientCtx, clientStreamDescForProxying, clientConn, c.proxy.FullMethodName())
if err != nil {
return err
}
c.finish = true
go c.readError(c.serverStream, clientStream, c.response)
return nil
}
func (c *Context) FastFinish() error {
defer c.reset()
if c.finish {
err, ok := <-c.errChan
if !ok {
return nil
}
return err
}
err := c.response.Error()
if err != nil {
return err
}
c.serverStream.SendHeader(c.response.Headers())
c.serverStream.SendMsg(c.response.Message())
c.serverStream.SetTrailer(c.response.Trailer())
return nil
}
func (c *Context) reset() {
c.port = 0
c.ctx = nil
c.app = nil
c.balance = nil
c.upstreamHostHandler = nil
c.finishHandler = nil
c.completeHandler = nil
pool.Put(c)
}
func (c *Context) IsCloneable() bool {
return false
}
func (c *Context) Clone() (eocontext.EoContext, error) {
//TODO
return nil, fmt.Errorf("%s %w", "GrpcContext", eocontext.ErrEoCtxUnCloneable)
}