/
service.go
165 lines (155 loc) · 3.78 KB
/
service.go
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package controller
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"strings"
"github.com/gorilla/websocket"
)
// InitDockerConnection inits the connection to the docker service with the first message received from client
func initDockerConnection(service string, id string) (*websocket.Conn, error) {
conn, err := dialDockerService(service, id)
if err != nil {
return nil, err
}
return conn, nil
}
// DialDockerService create connection between web server and docker server
// Accept service type:
// tty debug
func dialDockerService(service string, id string) (*websocket.Conn, error) {
// Set up websocket connection
dockerAddr := os.Getenv("DOCKER_ADDRESS")
dockerPort := os.Getenv("DOCKER_PORT")
if len(dockerAddr) == 0 {
dockerAddr = "localhost"
}
if len(dockerPort) == 0 {
dockerPort = "8888"
}
dockerPort = ":" + dockerPort
dockerAddr = dockerAddr + dockerPort
url := url.URL{Scheme: "ws", Host: dockerAddr, Path: "/tty"}
conn, _, err := websocket.DefaultDialer.Dial(url.String(), nil)
if err != nil {
return nil, err
}
return conn, nil
}
func startContainer(b []byte) (string, error) {
// get addr
dockerAddr := os.Getenv("DOCKER_ADDRESS")
dockerPort := os.Getenv("DOCKER_PORT")
if len(dockerAddr) == 0 {
dockerAddr = "localhost"
}
if len(dockerPort) == 0 {
dockerPort = "8888"
}
dockerPort = ":" + dockerPort
dockerAddr = dockerAddr + dockerPort
url := url.URL{Scheme: "http", Host: dockerAddr, Path: "/create"}
resp, err := http.Post(url.String(), "application/x-www-form-urlencoded", strings.NewReader(string(b)))
if err != nil {
log.Println(err)
return "", err
}
res := NewContainerRet{}
retBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
err = json.Unmarshal(retBody, &res)
if err != nil {
return "", err
}
if !res.OK {
return "", errors.New(res.Msg)
}
return res.ID, nil
}
func resizeContainer(r *ResizeContainer) error {
// get addr
dockerAddr := os.Getenv("DOCKER_ADDRESS")
dockerPort := os.Getenv("DOCKER_PORT")
if len(dockerAddr) == 0 {
dockerAddr = "localhost"
}
if len(dockerPort) == 0 {
dockerPort = "8888"
}
dockerPort = ":" + dockerPort
dockerAddr = dockerAddr + dockerPort
url := url.URL{Scheme: "http", Host: dockerAddr, Path: "/resize"}
b, err := json.Marshal(r)
if err != nil {
log.Println(err)
return err
}
resp, err := http.Post(url.String(), "application/x-www-form-urlencoded", strings.NewReader(string(b)))
if err != nil {
log.Println(err)
return err
}
ret := ResizeContainerRet{}
retBody, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Println(err)
return err
}
err = json.Unmarshal(retBody, &ret)
if err != nil {
log.Println(err)
return err
}
if ret.OK {
return nil
}
log.Println(ret.Msg)
return errors.New(ret.Msg)
}
// ReadFromClient receive message from client connection
func readFromClient(clientChan chan<- RequestCommand, ws *websocket.Conn) {
for {
_, b, err := ws.ReadMessage()
if err != nil {
if websocket.IsCloseError(err, websocket.CloseGoingAway) {
log.Println("Remote user closed the connection")
ws.Close()
close(clientChan)
break
}
close(clientChan)
log.Println(err)
return
}
// read json message from rws
msg := RequestCommand{}
if err := json.Unmarshal(b, &msg); err != nil {
fmt.Fprintln(os.Stderr, "Can not parse data")
ws.Close()
close(clientChan)
break
}
clientChan <- msg
}
}
// getPwd return current path of given username
func getPwd(projectName string, username string, projectType int) string {
// TODO: return according to the context
return "/"
}
func getEnv(projectName string, username string, language int) []string {
env := []string{}
switch language {
case 0:
// golang
env = append(env, "GOPATH=/root/go:/home/go")
}
return env
}