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/*
* 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 (
"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
}
// 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)
}
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