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runnel_server.go
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/
runnel_server.go
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package main
import (
"encoding/json"
"flag"
"github.com/gorilla/mux"
"github.com/veritasos/runnel/runnel"
"log"
"net/http"
"strconv"
"strings"
)
// JSONResponse sent by server
type JSONResponse struct {
Response string `json:"response"`
}
// Application command from user
type Application struct {
Cmd string `json:"cmd"`
Cwd string `json:"cwd"`
}
func command(res http.ResponseWriter, req *http.Request) {
res.Header().Set("Content-Type", "application/json")
app := new(Application)
if err := json.NewDecoder(req.Body).Decode(&app); err != nil {
log.Println(err.Error())
http.Error(res, err.Error(), http.StatusInternalServerError)
return
}
// Split command into executable and args
executableAndArgs := strings.Split(app.Cmd, " ")
client := runnel.NewClient()
key, err := client.RunCommand(
executableAndArgs[0], executableAndArgs[1:],
app.Cwd)
if err != nil {
log.Println(err.Error())
http.Error(res, err.Error(), http.StatusInternalServerError)
return
}
res.WriteHeader(http.StatusCreated)
data := &JSONResponse{Response: key}
if err := json.NewEncoder(res).Encode(data); err != nil {
panic(err)
}
}
func stream(res http.ResponseWriter, req *http.Request) {
res.Header().Set("Content-Type", "application/json")
vars := mux.Vars(req)
timeout, _ := strconv.Atoi(req.FormValue("timeout"))
client := runnel.NewClient()
output, err := client.Stream(vars["key"], timeout)
if err != nil {
log.Println(err.Error())
http.Error(res, err.Error(), http.StatusInternalServerError)
return
}
data := &JSONResponse{Response: output}
if err := json.NewEncoder(res).Encode(data); err != nil {
panic(err)
}
}
func home(res http.ResponseWriter, req *http.Request) {
res.Header().Set("Content-Type", "application/json")
message := `
Available endpoints
http://localhost:9090/command
http://localhost:9090/stream
`
data := &JSONResponse{Response: message}
if err := json.NewEncoder(res).Encode(data); err != nil {
panic(err)
}
}
func main() {
var ip = flag.String("ip-address", "", "ip:port")
flag.StringVar(ip, "p", "", "ip:port")
flag.Parse()
if *ip == "" {
log.Fatal("Provide ip address and port, '-p ip:port'")
}
log.Println("Started Runnel Server on", *ip)
router := mux.NewRouter()
router.HandleFunc("/", home).Methods("GET")
router.HandleFunc("/command", command).Methods("POST")
router.HandleFunc("/stream/{key}", stream).Methods("GET")
http.ListenAndServe(*ip, router)
}