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package agent
import (
"encoding/json"
"io/ioutil"
"net/http"
"github.com/gin-gonic/gin"
common "github.com/iotbzh/xds-common/golib"
)
// Only define useful fields
type ExecArgs struct {
ID string `json:"id" binding:"required"`
}
// ExecCmd executes remotely a command
func (s *APIService) execCmd(c *gin.Context) {
s._execRequest("/exec", c)
}
// execSignalCmd executes remotely a command
func (s *APIService) execSignalCmd(c *gin.Context) {
s._execRequest("/signal", c)
}
func (s *APIService) _execRequest(url string, c *gin.Context) {
data, err := c.GetRawData()
if err != nil {
common.APIError(c, err.Error())
}
// First get Project ID to retrieve Server ID and send command to right server
id := c.Param("id")
if id == "" {
args := ExecArgs{}
// XXX - we cannot use c.BindJSON, so directly unmarshall it
// (see https://github.com/gin-gonic/gin/issues/1078)
if err := json.Unmarshal(data, &args); err != nil {
common.APIError(c, "Invalid arguments")
return
}
id = args.ID
}
prj := s.projects.Get(id)
if prj == nil {
common.APIError(c, "Unknown id")
return
}
svr := (*prj).GetServer()
if svr == nil {
common.APIError(c, "Cannot identify XDS Server")
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 XDSServer WS events to client WS
// TODO removed static event name list and get it from XDSServer
for _, evName := range []string{
"exec:input",
"exec:output",
"exec:exit",
"exec:inferior-input",
"exec:inferior-output",
} {
evN := evName
svr.EventOn(evN, func(evData interface{}) {
(*sock).Emit(evN, evData)
})
}
// Forward back command to right server
response, err := svr.HTTPPostBody(url, string(data))
if err != nil {
common.APIError(c, err.Error())
return
}
// Decode response
body, err := ioutil.ReadAll(response.Body)
if err != nil {
common.APIError(c, "Cannot read response body")
return
}
c.JSON(http.StatusOK, string(body))
}
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