-
Notifications
You must be signed in to change notification settings - Fork 797
/
upstream.go
316 lines (260 loc) · 9 KB
/
upstream.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
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package proxy
import (
"container/list"
"context"
"sync/atomic"
"time"
"mosn.io/mosn/pkg/log"
"mosn.io/mosn/pkg/protocol"
"mosn.io/mosn/pkg/trace"
"mosn.io/mosn/pkg/types"
)
// types.StreamEventListener
// types.StreamReceiveListener
// types.PoolEventListener
type upstreamRequest struct {
proxy *proxy
downStream *downStream
protocol types.ProtocolName
host types.Host
requestSender types.StreamSender
connPool types.ConnectionPool
// ~~~ upstream response buf
upstreamRespHeaders types.HeaderMap
//~~~ state
sendComplete bool
dataSent bool
trailerSent bool
setupRetry bool
// time at send upstream request
startTime time.Time
// list element
element *list.Element
}
// reset upstream request in proxy context
// 1. downstream cleanup
// 2. on upstream global timeout
// 3. on upstream per req timeout
// 4. on upstream response receive error
// 5. before a retry
func (r *upstreamRequest) resetStream() {
if r.requestSender != nil {
r.requestSender.GetStream().RemoveEventListener(r)
r.requestSender.GetStream().ResetStream(types.StreamLocalReset)
}
}
// types.StreamEventListener
// Called by stream layer normally
func (r *upstreamRequest) OnResetStream(reason types.StreamResetReason) {
if r.setupRetry {
return
}
// todo: check if we get a reset on encode request headers. e.g. send failed
if !atomic.CompareAndSwapUint32(&r.downStream.upstreamReset, 0, 1) {
return
}
r.downStream.resetReason.Store(reason)
r.downStream.sendNotify()
}
func (r *upstreamRequest) OnDestroyStream() {}
func (r *upstreamRequest) endStream() {
upstreamResponseDurationNs := time.Now().Sub(r.startTime).Nanoseconds()
r.host.HostStats().UpstreamRequestDuration.Update(upstreamResponseDurationNs)
r.host.HostStats().UpstreamRequestDurationTotal.Inc(upstreamResponseDurationNs)
r.host.ClusterInfo().Stats().UpstreamRequestDuration.Update(upstreamResponseDurationNs)
r.host.ClusterInfo().Stats().UpstreamRequestDurationTotal.Inc(upstreamResponseDurationNs)
// todo: record upstream process time in request info
}
// types.StreamReceiveListener
// Method to decode upstream's response message
func (r *upstreamRequest) OnReceive(ctx context.Context, headers types.HeaderMap, data types.IoBuffer, trailers types.HeaderMap) {
if r.downStream.processDone() || r.setupRetry {
return
}
if !atomic.CompareAndSwapUint32(&r.downStream.upstreamResponseReceived, 0, 1) {
return
}
r.endStream()
if code, err := protocol.MappingHeaderStatusCode(r.downStream.context, r.protocol, headers); err == nil {
r.downStream.requestInfo.SetResponseCode(code)
}
r.downStream.requestInfo.SetResponseReceivedDuration(time.Now())
r.downStream.downstreamRespHeaders = headers
r.downStream.downstreamRespDataBuf = data
r.downStream.downstreamRespTrailers = trailers
if log.Proxy.GetLogLevel() >= log.DEBUG {
log.Proxy.Debugf(r.downStream.context, "[proxy] [upstream] OnReceive headers: %+v, data: %+v, trailers: %+v", headers, data, trailers)
}
r.downStream.sendNotify()
}
func (r *upstreamRequest) receiveHeaders(endStream bool) {
if r.downStream.processDone() || r.setupRetry {
return
}
r.downStream.onUpstreamHeaders(endStream)
}
func (r *upstreamRequest) receiveData(endStream bool) {
if r.downStream.processDone() || r.setupRetry {
return
}
r.downStream.onUpstreamData(endStream)
}
func (r *upstreamRequest) receiveTrailers() {
if r.downStream.processDone() || r.setupRetry {
return
}
r.downStream.onUpstreamTrailers()
}
func (r *upstreamRequest) OnDecodeError(context context.Context, err error, headers types.HeaderMap) {
log.Proxy.Errorf(r.downStream.context, "[proxy] [upstream] OnDecodeError error: %+v", err)
r.OnResetStream(types.StreamLocalReset)
}
// ~~~ send request wrapper
func (r *upstreamRequest) appendHeaders(endStream bool) {
if r.downStream.processDone() {
return
}
if log.Proxy.GetLogLevel() >= log.DEBUG {
log.Proxy.Debugf(r.downStream.context, "[proxy] [upstream] append headers: %+v", r.downStream.downstreamReqHeaders)
}
r.sendComplete = endStream
var (
host types.Host
streamSender types.StreamSender
failReason types.PoolFailureReason
)
if r.downStream.oneway {
host, streamSender, failReason = r.connPool.NewStream(r.downStream.context, nil)
} else {
host, streamSender, failReason = r.connPool.NewStream(r.downStream.context, r)
}
if failReason != "" {
r.OnFailure(failReason, host)
return
}
r.OnReady(streamSender, host)
}
func (r *upstreamRequest) convertHeader(headers types.HeaderMap) types.HeaderMap {
if r.downStream.noConvert {
return headers
}
dp, up := r.downStream.convertProtocol()
// need protocol convert
if dp != up {
if convHeader, err := protocol.ConvertHeader(r.downStream.context, dp, up, headers); err == nil {
return convHeader
} else {
log.Proxy.Warnf(r.downStream.context, "[proxy] [upstream] convert header from %s to %s failed, %s", dp, up, err.Error())
}
}
return headers
}
func (r *upstreamRequest) appendData(endStream bool) {
if r.downStream.processDone() {
return
}
if log.Proxy.GetLogLevel() >= log.DEBUG {
log.Proxy.Debugf(r.downStream.context, "[proxy] [upstream] append data:% +v", r.downStream.downstreamReqDataBuf)
}
data := r.downStream.downstreamReqDataBuf
r.sendComplete = endStream
r.dataSent = true
r.requestSender.AppendData(r.downStream.context, r.convertData(data), endStream)
}
func (r *upstreamRequest) convertData(data types.IoBuffer) types.IoBuffer {
if r.downStream.noConvert {
return data
}
dp, up := r.downStream.convertProtocol()
// need protocol convert
if dp != up {
if convData, err := protocol.ConvertData(r.downStream.context, dp, up, data); err == nil {
return convData
} else {
if log.Proxy.GetLogLevel() >= log.WARN {
log.Proxy.Warnf(r.downStream.context, "[proxy] [upstream] convert data from %s to %s failed, %s", dp, up, err.Error())
}
}
}
return data
}
func (r *upstreamRequest) appendTrailers() {
if r.downStream.processDone() {
return
}
if log.Proxy.GetLogLevel() >= log.DEBUG {
log.Proxy.Debugf(r.downStream.context, "[proxy] [upstream] append trailers:%+v", r.downStream.downstreamReqTrailers)
}
trailers := r.downStream.downstreamReqTrailers
r.sendComplete = true
r.trailerSent = true
r.requestSender.AppendTrailers(r.downStream.context, trailers)
}
func (r *upstreamRequest) convertTrailer(trailers types.HeaderMap) types.HeaderMap {
if r.downStream.noConvert {
return trailers
}
dp, up := r.downStream.convertProtocol()
// need protocol convert
if dp != up {
if convTrailer, err := protocol.ConvertTrailer(r.downStream.context, dp, up, trailers); err == nil {
return convTrailer
} else {
if log.Proxy.GetLogLevel() >= log.WARN {
log.Proxy.Warnf(r.downStream.context, "[proxy] [upstream] convert header from %s to %s failed, %s", dp, up, err.Error())
}
}
}
return trailers
}
// types.PoolEventListener
func (r *upstreamRequest) OnFailure(reason types.PoolFailureReason, host types.Host) {
var resetReason types.StreamResetReason
log.Proxy.Errorf(r.downStream.context, "[proxy] [upstream] OnFailure host:%s, reason:%v", host.AddressString(), reason)
switch reason {
case types.Overflow:
resetReason = types.StreamOverflow
case types.ConnectionFailure:
resetReason = types.StreamConnectionFailed
}
r.host = host
r.OnResetStream(resetReason)
}
func (r *upstreamRequest) OnReady(sender types.StreamSender, host types.Host) {
// debug message for upstream
if log.Proxy.GetLogLevel() >= log.DEBUG {
log.Proxy.Debugf(r.downStream.context, "[proxy] [upstream] connPool ready, proxyId = %v, host = %s", r.downStream.ID, host.AddressString())
}
r.requestSender = sender
r.host = host
r.requestSender.GetStream().AddEventListener(r)
// start a upstream send
r.startTime = time.Now()
r.downStream.requestInfo.OnUpstreamHostSelected(host)
r.downStream.requestInfo.SetUpstreamLocalAddress(host.AddressString())
if trace.IsEnabled() {
span := trace.SpanFromContext(r.downStream.context)
if span != nil {
span.InjectContext(r.downStream.downstreamReqHeaders, r.downStream.requestInfo)
}
}
endStream := r.sendComplete && !r.dataSent && !r.trailerSent
r.requestSender.AppendHeaders(r.downStream.context, r.convertHeader(r.downStream.downstreamReqHeaders), endStream)
// todo: check if we get a reset on send headers
}