mirror of https://github.com/anoshenko/rui.git
308 lines
6.6 KiB
Go
308 lines
6.6 KiB
Go
//go:build !wasm
|
|
|
|
package rui
|
|
|
|
import (
|
|
"context"
|
|
_ "embed"
|
|
"fmt"
|
|
"io"
|
|
"log"
|
|
"math/rand"
|
|
"net/http"
|
|
"os/exec"
|
|
"runtime"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
)
|
|
|
|
//go:embed app_socket.js
|
|
var socketScripts string
|
|
|
|
type application struct {
|
|
server *http.Server
|
|
params AppParams
|
|
createContentFunc func(Session) SessionContent
|
|
sessions map[int]Session
|
|
}
|
|
|
|
func (app *application) getStartPage() string {
|
|
buffer := allocStringBuilder()
|
|
defer freeStringBuilder(buffer)
|
|
|
|
buffer.WriteString("<!DOCTYPE html>\n<html>\n")
|
|
getStartPage(buffer, app.params, socketScripts)
|
|
buffer.WriteString("\n</html>")
|
|
return buffer.String()
|
|
}
|
|
|
|
func (app *application) Finish() {
|
|
for _, session := range app.sessions {
|
|
session.close()
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
defer cancel()
|
|
|
|
if err := app.server.Shutdown(ctx); err != nil {
|
|
log.Println(err.Error())
|
|
}
|
|
}
|
|
|
|
func (app *application) nextSessionID() int {
|
|
n := rand.Intn(0x7FFFFFFE) + 1
|
|
_, ok := app.sessions[n]
|
|
for ok {
|
|
n = rand.Intn(0x7FFFFFFE) + 1
|
|
_, ok = app.sessions[n]
|
|
}
|
|
return n
|
|
}
|
|
|
|
func (app *application) removeSession(id int) {
|
|
delete(app.sessions, id)
|
|
}
|
|
|
|
func (app *application) ServeHTTP(w http.ResponseWriter, req *http.Request) {
|
|
|
|
if ProtocolInDebugLog {
|
|
DebugLogF("%s %s", req.Method, req.URL.Path)
|
|
}
|
|
|
|
switch req.Method {
|
|
case "GET":
|
|
switch req.URL.Path {
|
|
case "/":
|
|
w.WriteHeader(http.StatusOK)
|
|
io.WriteString(w, app.getStartPage())
|
|
|
|
case "/ws":
|
|
if brige := CreateSocketBrige(w, req); brige != nil {
|
|
go app.socketReader(brige)
|
|
}
|
|
|
|
default:
|
|
filename := req.URL.Path[1:]
|
|
if size := len(filename); size > 0 && filename[size-1] == '/' {
|
|
filename = filename[:size-1]
|
|
}
|
|
|
|
if !serveResourceFile(filename, w, req) &&
|
|
!serveDownloadFile(filename, w, req) {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (app *application) socketReader(brige webBrige) {
|
|
var session Session
|
|
events := make(chan DataObject, 1024)
|
|
|
|
for {
|
|
message, ok := brige.readMessage()
|
|
if !ok {
|
|
events <- NewDataObject("disconnect")
|
|
return
|
|
}
|
|
|
|
if ProtocolInDebugLog {
|
|
DebugLog(message)
|
|
}
|
|
|
|
if obj := ParseDataText(message); obj != nil {
|
|
command := obj.Tag()
|
|
switch command {
|
|
case "startSession":
|
|
answer := ""
|
|
if session, answer = app.startSession(obj, events, brige); session != nil {
|
|
if !brige.writeMessage(answer) {
|
|
return
|
|
}
|
|
session.onStart()
|
|
go sessionEventHandler(session, events, brige)
|
|
}
|
|
|
|
case "reconnect":
|
|
if sessionText, ok := obj.PropertyValue("session"); ok {
|
|
if sessionID, err := strconv.Atoi(sessionText); err == nil {
|
|
if session = app.sessions[sessionID]; session != nil {
|
|
session.setBrige(events, brige)
|
|
answer := allocStringBuilder()
|
|
defer freeStringBuilder(answer)
|
|
|
|
session.writeInitScript(answer)
|
|
if !brige.writeMessage(answer.String()) {
|
|
return
|
|
}
|
|
session.onReconnect()
|
|
go sessionEventHandler(session, events, brige)
|
|
return
|
|
}
|
|
DebugLogF("Session #%d not exists", sessionID)
|
|
} else {
|
|
ErrorLog(`strconv.Atoi(sessionText) error: ` + err.Error())
|
|
}
|
|
} else {
|
|
ErrorLog(`"session" key not found`)
|
|
}
|
|
|
|
answer := ""
|
|
if session, answer = app.startSession(obj, events, brige); session != nil {
|
|
if !brige.writeMessage(answer) {
|
|
return
|
|
}
|
|
session.onStart()
|
|
go sessionEventHandler(session, events, brige)
|
|
}
|
|
|
|
case "answer":
|
|
session.handleAnswer(obj)
|
|
|
|
case "imageLoaded":
|
|
session.imageManager().imageLoaded(obj, session)
|
|
|
|
case "imageError":
|
|
session.imageManager().imageLoadError(obj, session)
|
|
|
|
default:
|
|
events <- obj
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func sessionEventHandler(session Session, events chan DataObject, brige webBrige) {
|
|
for {
|
|
data := <-events
|
|
|
|
switch command := data.Tag(); command {
|
|
case "disconnect":
|
|
session.onDisconnect()
|
|
return
|
|
|
|
case "session-close":
|
|
session.onFinish()
|
|
session.App().removeSession(session.ID())
|
|
brige.close()
|
|
|
|
default:
|
|
session.handleEvent(command, data)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (app *application) startSession(params DataObject, events chan DataObject, brige webBrige) (Session, string) {
|
|
if app.createContentFunc == nil {
|
|
return nil, ""
|
|
}
|
|
|
|
session := newSession(app, app.nextSessionID(), "", params)
|
|
session.setBrige(events, brige)
|
|
if !session.setContent(app.createContentFunc(session)) {
|
|
return nil, ""
|
|
}
|
|
|
|
app.sessions[session.ID()] = session
|
|
|
|
answer := allocStringBuilder()
|
|
defer freeStringBuilder(answer)
|
|
|
|
answer.WriteString("sessionID = '")
|
|
answer.WriteString(strconv.Itoa(session.ID()))
|
|
answer.WriteString("';\n")
|
|
session.writeInitScript(answer)
|
|
answerText := answer.String()
|
|
|
|
if ProtocolInDebugLog {
|
|
DebugLog("Start session:")
|
|
DebugLog(answerText)
|
|
}
|
|
return session, answerText
|
|
}
|
|
|
|
var apps = []*application{}
|
|
|
|
// StartApp - create the new application and start it
|
|
func StartApp(addr string, createContentFunc func(Session) SessionContent, params AppParams) {
|
|
app := new(application)
|
|
app.params = params
|
|
app.sessions = map[int]Session{}
|
|
app.createContentFunc = createContentFunc
|
|
apps = append(apps, app)
|
|
|
|
redirectAddr := ""
|
|
if index := strings.IndexRune(addr, ':'); index >= 0 {
|
|
redirectAddr = addr[:index] + ":80"
|
|
} else {
|
|
redirectAddr = addr + ":80"
|
|
if params.CertFile != "" && params.KeyFile != "" {
|
|
addr += ":443"
|
|
} else {
|
|
addr += ":80"
|
|
}
|
|
}
|
|
|
|
app.server = &http.Server{Addr: addr}
|
|
http.Handle("/", app)
|
|
|
|
serverRun := func(err error) {
|
|
if err != nil {
|
|
if err == http.ErrServerClosed {
|
|
log.Println(err)
|
|
} else {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
if params.CertFile != "" && params.KeyFile != "" {
|
|
if params.Redirect80 {
|
|
redirectTLS := func(w http.ResponseWriter, r *http.Request) {
|
|
http.Redirect(w, r, "https://"+addr+r.RequestURI, http.StatusMovedPermanently)
|
|
}
|
|
|
|
go func() {
|
|
serverRun(http.ListenAndServe(redirectAddr, http.HandlerFunc(redirectTLS)))
|
|
}()
|
|
}
|
|
serverRun(app.server.ListenAndServeTLS(params.CertFile, params.KeyFile))
|
|
} else {
|
|
serverRun(app.server.ListenAndServe())
|
|
}
|
|
}
|
|
|
|
func FinishApp() {
|
|
for _, app := range apps {
|
|
app.Finish()
|
|
}
|
|
apps = []*application{}
|
|
}
|
|
|
|
func OpenBrowser(url string) bool {
|
|
var err error
|
|
|
|
switch runtime.GOOS {
|
|
case "linux":
|
|
for _, provider := range []string{"xdg-open", "x-www-browser", "www-browser"} {
|
|
if _, err = exec.LookPath(provider); err == nil {
|
|
if exec.Command(provider, url).Start(); err == nil {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
|
|
case "windows":
|
|
err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
|
|
|
|
case "darwin":
|
|
err = exec.Command("open", url).Start()
|
|
|
|
default:
|
|
err = fmt.Errorf("unsupported platform")
|
|
}
|
|
|
|
return err != nil
|
|
}
|