summaryrefslogtreecommitdiffstats
path: root/lib/agent/apiv1-targets.go
blob: cc0882276f4cb6e05c3268f3b00301ad4f478b62 (plain)
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
/*
 * Copyright (C) 2018 "IoT.bzh"
 * Author Sebastien Douheret <sebastien@iot.bzh>
 *
 * Licensed 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 agent

import (
	"encoding/json"
	"fmt"
	"net/http"

	"gerrit.automotivelinux.org/gerrit/src/xds/xds-agent/lib/xaapiv1"
	common "gerrit.automotivelinux.org/gerrit/src/xds/xds-common.git/golib"
	"gerrit.automotivelinux.org/gerrit/src/xds/xds-server.git/lib/xsapiv1"
	"github.com/franciscocpg/reflectme"
	"github.com/gin-gonic/gin"
	uuid "github.com/satori/go.uuid"
)

// targetsPassthroughInit Declare passthrough routes for targets
func (s *APIService) targetsPassthroughInit(svr *XdsServer) error {
	svr.PassthroughGet("/targets")
	svr.PassthroughGet("/targets/:id")
	svr.PassthroughPost("/targets")
	svr.PassthroughDelete("/targets/:id")

	svr.PassthroughGet("/targets/:id/terminals")
	svr.PassthroughGet("/targets/:id/terminals/:tid")
	svr.PassthroughPost("/targets/:id/terminals")
	svr.PassthroughPut("/targets/:id/terminals/:tid")
	svr.PassthroughDelete("/targets/:id/terminals/:tid")

	svr.apiRouter.POST("/targets/:id/terminals/:tid/open", s.TargetTerminalOpen)

	svr.PassthroughPost("/targets/:id/terminals/:tid/close")
	svr.PassthroughPost("/targets/:id/terminals/:tid/resize")
	svr.PassthroughPost("/targets/:id/terminals/:tid/signal")
	svr.PassthroughPost("/targets/:id/terminals/:tid/signal/:sig")

	return nil
}

// targetsEventsForwardInit Register events forwarder for targets
func (s *APIService) targetsEventsForwardInit(svr *XdsServer) error {

	if !svr.Connected {
		return fmt.Errorf("Cannot register events: XDS Server %v not connected", svr.ID)
	}

	// Forward Target events from XDS-server to client
	if _, err := svr.EventOn(xsapiv1.EVTTargetAdd, xaapiv1.EVTTargetAdd, s._targetsEventCB); err != nil {
		s.Log.Errorf("XDS Server EventOn '%s' failed: %v", xsapiv1.EVTTargetAdd, err)
		return err
	}
	if _, err := svr.EventOn(xsapiv1.EVTTargetRemove, xaapiv1.EVTTargetRemove, s._targetsEventCB); err != nil {
		s.Log.Errorf("XDS Server EventOn '%s' failed: %v", xsapiv1.EVTTargetRemove, err)
		return err
	}
	if _, err := svr.EventOn(xsapiv1.EVTTargetStateChange, xaapiv1.EVTTargetStateChange, s._targetsEventCB); err != nil {
		s.Log.Errorf("XDS Server EventOn '%s' failed: %v", xsapiv1.EVTTargetStateChange, err)
		return err
	}

	return nil
}

func (s *APIService) _targetsEventCB(privD interface{}, data interface{}) error {
	evt := xsapiv1.EventMsg{}
	d, err := json.Marshal(data)
	if err != nil {
		s.Log.Errorf("Cannot marshal XDS Server Target event err=%v, data=%v", err, data)
		return err
	}
	if err = json.Unmarshal(d, &evt); err != nil {
		s.Log.Errorf("Cannot unmarshal XDS Server Target event err=%v, d=%v", err, string(d))
		return err
	}

	// assume that xsapiv1.TargetConfig == xaapiv1.TargetConfig
	target, err := evt.DecodeTargetEvent()
	if err != nil {
		s.Log.Errorf("Cannot decode XDS Server Target event: err=%v, data=%v", err, data)
		return err
	}

	evtName := privD.(string)

	if err := s.events.Emit(evtName, target, ""); err != nil {
		s.Log.Warningf("Cannot notify %s (from server): %v", evtName, err)
		return err
	}
	return nil
}

// terminalsEventsForwardInit Register events forwarder for terminals
func (s *APIService) terminalsEventsForwardInit(svr *XdsServer) error {

	if !svr.Connected {
		return fmt.Errorf("Cannot register events: XDS Server %v not connected", svr.ID)
	}

	// Forward Terminal events from XDS-server to client
	if _, err := svr.EventOn(xsapiv1.EVTTargetTerminalAdd, xaapiv1.EVTTargetTerminalAdd, s._terminalsEventCB); err != nil {
		s.Log.Errorf("XDS Server EventOn '%s' failed: %v", xsapiv1.EVTTargetTerminalAdd, err)
		return err
	}
	if _, err := svr.EventOn(xsapiv1.EVTTargetTerminalRemove, xaapiv1.EVTTargetTerminalRemove, s._terminalsEventCB); err != nil {
		s.Log.Errorf("XDS Server EventOn '%s' failed: %v", xsapiv1.EVTTargetTerminalRemove, err)
		return err
	}
	if _, err := svr.EventOn(xsapiv1.EVTTargetTerminalStateChange, xaapiv1.EVTTargetTerminalStateChange, s._terminalsEventCB); err != nil {
		s.Log.Errorf("XDS Server EventOn '%s' failed: %v", xsapiv1.EVTTargetTerminalStateChange, err)
		return err
	}

	return nil
}

func (s *APIService) _terminalsEventCB(privD interface{}, data interface{}) error {
	evt := xsapiv1.EventMsg{}
	d, err := json.Marshal(data)
	if err != nil {
		s.Log.Errorf("Cannot marshal XDS Server Target event err=%v, data=%v", err, data)
		return err
	}
	if err = json.Unmarshal(d, &evt); err != nil {
		s.Log.Errorf("Cannot unmarshal XDS Server Target event err=%v, d=%v", err, string(d))
		return err
	}

	// assume that xsapiv1.TargetConfig == xaapiv1.TargetConfig
	target, err := evt.DecodeTerminalEvent()
	if err != nil {
		s.Log.Errorf("Cannot decode XDS Server Target event: err=%v, data=%v", err, data)
		return err
	}

	evtName := privD.(string)

	if err := s.events.Emit(evtName, target, ""); err != nil {
		s.Log.Warningf("Cannot notify %s (from server): %v", evtName, err)
		return err
	}
	return nil
}

// GetServerFromTargetID Retrieve XDS Server definition from a target ID
func (s *APIService) GetServerFromTargetID(targetID, termID string) (*XdsServer, string, error) {

	// FIXME add cache (but take care to support partial term ID)
	for _, svr := range s.xdsServers {
		term := xsapiv1.TerminalConfig{}
		if err := svr.CommandTgtTerminalGet(targetID, termID, &term); err == nil {
			return svr, term.ID, nil
		}
	}
	return nil, "", fmt.Errorf("Cannot identify XDS Server")
}

// TargetTerminalOpen Open a target terminal/console
func (s *APIService) TargetTerminalOpen(c *gin.Context) {

	// First retrieve Server ID and send command to right server
	targetID := c.Param("id")
	svr, termID, err := s.GetServerFromTargetID(targetID, c.Param("tid"))
	if err != nil {
		common.APIError(c, err.Error())
		return
	}

	// Retrieve session info
	sess := s.sessions.Get(c)
	if sess == nil {
		common.APIError(c, "Unknown sessions")
		return
	}
	sock := sess.IOSocket
	if sock == nil {
		common.APIError(c, "Websocket not established")
		return
	}

	// Forward input events from client to XDSServer through WS
	err = (*sock).On(xsapiv1.TerminalInEvent, func(stdin string) {
		s.LogSillyf("TARGET TERMINAL EVENT IN (%s) <<%v>>", xsapiv1.TerminalInEvent, stdin)
		svr.EventEmit(xaapiv1.TerminalInEvent, stdin)
	})
	if err != nil {
		msgErr := "Error while registering WS for " + xsapiv1.TerminalInEvent + " event"
		s.Log.Errorf(msgErr, ", err: %v", err)
		common.APIError(c, msgErr)
		return
	}

	// Forward output events from XDSServer to client through WS
	var outFwdFuncID uuid.UUID
	outFwdFunc := func(pData interface{}, evData interface{}) error {
		sid := pData.(string)
		// IO socket can be nil when disconnected
		so := s.sessions.IOSocketGet(sid)
		if so == nil {
			s.Log.Infof("%s not emitted: WS closed (sid:%s)", xaapiv1.TerminalOutEvent, sid)
			return nil
		}

		// Add sessionID to event Data
		reflectme.SetField(evData, "sessionID", sid)

		s.LogSillyf("TARGET TERMINAL EVENT OUT (%s) <<%v>>", xaapiv1.TerminalOutEvent, evData)

		// Forward event to Client/Dashboard
		(*so).Emit(xaapiv1.TerminalOutEvent, evData)
		return nil
	}
	outFwdFuncID, err = svr.EventOn(xsapiv1.TerminalOutEvent, sess.ID, outFwdFunc)
	if err != nil {
		common.APIError(c, err.Error())
		return
	}

	// Handle Exit event separately to cleanup registered listener
	var exitFuncID uuid.UUID
	exitFunc := func(privD interface{}, evData interface{}) error {
		evN := xaapiv1.TerminalExitEvent

		pData := privD.(map[string]string)
		sid := pData["sessID"]

		// Add sessionID to event Data
		reflectme.SetField(evData, "sessionID", sid)

		// IO socket can be nil when disconnected
		so := s.sessions.IOSocketGet(sid)
		if so != nil {
			(*so).Emit(evN, evData)
		} else {
			s.Log.Infof("%s not emitted: WS closed (sid:%s)", evN, sid)
		}

		// cleanup listener
		svr.EventOff(xaapiv1.TerminalOutEvent, outFwdFuncID)
		svr.EventOff(evN, exitFuncID)

		return nil
	}

	privData := map[string]string{
		"sessID": sess.ID,
	}
	exitFuncID, err = svr.EventOn(xaapiv1.TerminalExitEvent, privData, exitFunc)
	if err != nil {
		common.APIError(c, err.Error())
		return
	}

	// Forward back command to right server
	res := xsapiv1.TerminalConfig{}
	if err := svr.CommandTgtTerminalOpen(targetID, termID, &res); err != nil {
		common.APIError(c, err.Error())
		return
	}

	c.JSON(http.StatusOK, res)
}