/
main.go
407 lines (363 loc) · 10 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
package main
import (
"encoding/json"
"flag"
"html/template"
"image/png"
"io/ioutil"
"net/http"
"os"
"strings"
"github.com/gorilla/mux"
"github.com/gorilla/websocket"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/qr"
"github.com/jmcvetta/randutil"
"github.com/scritch007/Racer/types"
"github.com/scritch007/go-tools"
)
var addr = flag.String("addr", ":8080", "http service address")
var debug = flag.Bool("debug", false, "Turn into debug mode")
var upgrader = websocket.Upgrader{} // use default options
//GameConfig the game configuration
type GameConfig struct {
Name string `json:"name"`
Image string `json:"image"`
Game string
}
var games []GameConfig
type serverConnection struct {
server *websocket.Conn
clients map[string]*websocket.Conn
config *types.NewInstanceConfig
}
var serverConnections map[string]*serverConnection
func init() {
serverConnections = make(map[string]*serverConnection)
games = make([]GameConfig, 0, 10)
files, err := ioutil.ReadDir("./games/")
if nil != err {
tools.LOG_ERROR.Printf("Couldn't find the folder")
}
for _, f := range files {
if !f.IsDir() {
continue
}
if f.Name() == "html" || f.Name() == ".git" {
//Then skip it
} else {
var c GameConfig
configFileName := "./games/" + f.Name() + "/app.json"
data, err := ioutil.ReadFile(configFileName)
err = json.Unmarshal(data, &c)
if nil != err {
tools.LOG_ERROR.Fatalf("Couldn't read configuration %s, %s\n", configFileName, err.Error())
} else {
c.Game = f.Name()
games = games[:len(games)+1]
games[len(games)-1] = c
}
}
}
}
func serverWS(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := vars["id"]
c, err := upgrader.Upgrade(w, r, nil)
if err != nil {
tools.LOG_ERROR.Print("upgrade:", err)
return
}
newServerConnection := new(serverConnection)
newServerConnection.server = c
newServerConnection.clients = make(map[string]*websocket.Conn)
newServerConnection.config = nil
serverConnections[id] = newServerConnection
tools.LOG_DEBUG.Printf("Adding new server connection %s\n", id)
defer func() {
c.Close()
//TODO notify all the clients + cleanup everyting correctly
delete(serverConnections, id)
}()
for {
mt, message, err := c.ReadMessage()
if err != nil {
tools.LOG_ERROR.Println("read:", err)
break
}
tools.LOG_DEBUG.Printf("Server recv: %s", message)
mfs, err := types.MessageFromString(string(message))
if nil != err {
tools.LOG_ERROR.Println("Invalid json received error "+string(message), err)
continue
}
if 0 == mfs.Type {
// Forward message... This is a valid json but not correct message type
for _, client := range newServerConnection.clients {
// Writing to client
tools.LOG_DEBUG.Println("Writing to client")
client.WriteMessage(mt, message)
}
}
if mfs.Type == types.EnumMessageControl {
if mfs.SubType == types.EnumControlNewInstance {
nic, err := types.NewInstanceConfigFromString(mfs.Message)
if nil != err {
tools.LOG_ERROR.Println("Error deserializing new Instance ", err)
continue
}
//Check for configuration
newServerConnection.config = nic
}
} else if mfs.Type == types.EnumMessageMove {
if 0 == len(newServerConnection.clients) {
tools.LOG_DEBUG.Println("Client is still empty")
continue
}
for _, client := range newServerConnection.clients {
client.WriteMessage(mt, message)
}
} else if mfs.Type == types.EnumMessageCustom {
if 0 == len(newServerConnection.clients) {
tools.LOG_DEBUG.Println("Client is still empty")
continue
}
for _, client := range newServerConnection.clients {
client.WriteMessage(mt, message)
}
} else {
tools.LOG_ERROR.Println("Invalid type")
}
}
}
func clientWS(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := vars["id"]
subid := vars["subid"]
c, err := upgrader.Upgrade(w, r, nil)
if err != nil {
tools.LOG_ERROR.Print("upgrade:", err)
return
}
serverSocket, found := serverConnections[id]
if !found {
tools.LOG_ERROR.Printf("Couldn't find server side %s\n", id)
c.Close()
return
}
defer func() {
c.Close()
//TODO notify all the clients + cleanup everyting correctly
delete(serverSocket.clients, subid)
}()
if nil == serverSocket.config {
tools.LOG_ERROR.Println("Opening connection on an empty configuration. Closing connection")
return
}
if 0 != len(serverSocket.clients) && !serverSocket.config.Multiplayer {
_, _, _ = c.ReadMessage()
c.WriteMessage(0, []byte("Someone is already there"))
return
}
serverSocket.clients[subid] = c
//Notify Server that the client arrived
newClientMessage := types.Message{
Type: types.EnumMessageControl,
SubType: types.EnumControlStartClientSession,
Message: subid,
}
ncmj, err := newClientMessage.ToString()
if nil != err {
tools.LOG_ERROR.Println("Failed to serialize message ", err)
return
}
serverSocket.server.WriteMessage(1, []byte(ncmj))
for {
mt, message, err := c.ReadMessage()
if err != nil {
tools.LOG_ERROR.Println("read:", err)
break
}
newMssage, err := types.MessageFromString(string(message))
if nil != err {
tools.LOG_ERROR.Println("Failed to deserialize message " + string(message) + " " + err.Error())
continue
}
if 0 == newMssage.Type {
// Invalid message type forward to server
serverSocket.server.WriteMessage(mt, message)
continue
}
if !serverSocket.config.Websocket && newMssage.Type == types.EnumMessageControl {
tools.LOG_ERROR.Println("Received move message from client but this should be the case...")
continue
}
newMssage.ClientId = subid
m, err := newMssage.ToString()
if nil != err {
tools.LOG_ERROR.Println("Couldn't serialize message ", err)
continue
}
tools.LOG_DEBUG.Println("Client " + subid + " send :" + m)
serverSocket.server.WriteMessage(mt, []byte(m))
//tools.LOG_DEBUG.Printf("recv: %s", message)
}
}
func getProto(r *http.Request, websocket bool) string {
var resProto string
if websocket {
resProto = "ws"
} else {
resProto = "http"
}
proto := r.Header.Get("X-Forwarded-Proto")
if 0 != len(proto) {
if proto == "https" {
return resProto + "s"
}
} else if strings.Contains(r.Proto, "HTTPS") {
resProto = resProto + "s"
}
return resProto
}
func server(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := vars["id"]
game := vars["game"]
tmpl, err := template.ParseFiles("./games/" + game + "/index.html")
if err != nil {
panic(err)
}
socketProto := getProto(r, true)
values := struct {
WSocketURL string
QRCodeURL string
UserID string
Game string
ClientURL string
}{
WSocketURL: socketProto + "://" + r.Host + "/" + game + "/server.ws/" + id,
QRCodeURL: "/" + game + "/qrcode/" + id + ".png",
UserID: id,
Game: game,
ClientURL: getProto(r, false) + "://" + r.Host + "/" + game + "/client/" + id,
}
err = tmpl.Execute(w, values)
if nil != err {
tools.LOG_ERROR.Fatalln(err.Error())
}
}
func clientRedirect(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := vars["id"]
game := vars["game"]
var subid string
if *debug {
subid = "7890"
} else {
subid, _ = randutil.AlphaString(20)
//We should ensure that we didn't already random this string for another client for this session...
}
proto := getProto(r, false)
url := proto + "://" + r.Host + "/" + game + "/client/" + id + "/" + subid
tools.LOG_DEBUG.Println("Redirecting to " + url)
http.Redirect(w, r, url, http.StatusFound)
}
func client(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := vars["id"]
subid := vars["subid"]
game := vars["game"]
tmpl, err := template.ParseFiles("./games/" + game + "/client.html")
if err != nil {
panic(err)
}
socketProto := getProto(r, true)
values := struct {
WebSocketURL string
UserID string
Game string
}{
WebSocketURL: socketProto + "://" + r.Host + "/" + game + "/client.ws/" + id + "/" + subid,
UserID: subid,
Game: game,
}
err = tmpl.Execute(w, values)
if nil != err {
tools.LOG_ERROR.Println("Failed to render template ", err)
}
}
func qrcodeHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
id := vars["id"]
game := vars["game"]
var proto = "http"
if strings.Contains(r.Proto, "HTTPS") {
proto = "httpss"
}
qrcode, err := qr.Encode(proto+"://"+r.Host+"/"+game+"/client/"+id, qr.L, qr.Auto)
if err != nil {
tools.LOG_ERROR.Println(err)
} else {
qrcode, err = barcode.Scale(qrcode, 150, 150)
if err != nil {
tools.LOG_ERROR.Println(err)
} else {
png.Encode(w, qrcode)
}
}
}
func serveFile(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
filePath := vars["file"]
game := vars["game"]
if game == "html" {
http.ServeFile(w, r, "./"+game+"/"+filePath)
} else {
http.ServeFile(w, r, "./games/"+game+"/"+filePath)
}
}
func gameHome(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
game := vars["game"]
var id string
if *debug {
id = "123456"
} else {
id, _ = randutil.AlphaString(20)
}
//Redirect the server to a new instance
http.Redirect(w, r, "/"+game+"/server/"+id, http.StatusFound)
}
func home(w http.ResponseWriter, r *http.Request) {
values := struct {
Items []GameConfig
}{
Items: games,
}
tmpl, err := template.ParseFiles("html/index.html")
if err != nil {
panic(err)
}
err = tmpl.Execute(w, values)
if nil != err {
tools.LOG_ERROR.Println("Failed to render template ", err)
}
}
func main() {
tools.LogInit(os.Stdout, os.Stdout, os.Stdout, os.Stderr)
flag.Parse()
tools.LOG_ERROR.SetFlags(0)
r := mux.NewRouter()
r.HandleFunc("/{game}/client/{id}", clientRedirect)
r.HandleFunc("/{game}/client/{id}/{subid}", client)
r.HandleFunc("/{game}/server/{id}", server)
r.HandleFunc("/{game}/server.ws/{id}", serverWS)
r.HandleFunc("/{game}/client.ws/{id}/{subid}", clientWS)
r.HandleFunc("/{game}/qrcode/{id}.png", qrcodeHandler)
r.HandleFunc("/{game}/static/{file:.*}", serveFile)
r.HandleFunc("/{game}/", gameHome)
r.HandleFunc("/", home)
http.Handle("/", r)
tools.LOG_ERROR.Fatal(http.ListenAndServe(*addr, nil))
}