/
quarto-server.go
99 lines (81 loc) · 1.99 KB
/
quarto-server.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
package main
import (
"fmt"
"net"
"time"
"bytes"
"encoding/binary"
"synbioz/quarto"
)
type Message []byte
type Request struct {
Game quarto.Game
Index uint8
}
func readMessage(message Message) (*Request) {
var request *Request = new(Request)
var reader *bytes.Reader = bytes.NewReader(message)
binary.Read(reader, binary.LittleEndian, request)
return request
}
func handleRequest(request *Request) Message {
if request.Game.IsWinning() {
return Message{0}
} else {
move, win := request.Game.PlayWith(request.Index)
i, j, k := move.ToRepr()
if win {
return Message{2, i, j, k}
} else {
return Message{1, i, j, k}
}
}
}
func (request *Request) isValid() bool {
return request.Game.Stash[request.Index] != quarto.PIECE_EMPTY
}
// Read with timeout, then build a request and compute and send a response
// to the client.
//
// Data: < Board serialization >< Stash serialization >< Piece index >
// Size: < 16 * Piece >< 16 * Piece >< uint8 >
// Size in byte is: 33
func handleConnection(conn net.Conn) {
defer conn.Close()
// Set a timeout 10 seconds from the connection
timeout := time.Now().Add(time.Second * 10)
conn.SetDeadline(timeout)
msg := make(Message, 33)
_, err := conn.Read(msg)
// Error handling
if err != nil {
if err.(net.Error).Timeout() {
fmt.Print("Read timeout, closing connection.\n")
} else {
fmt.Printf("Error while reading: %s\n", err.Error())
}
return
}
request := readMessage(msg)
if request.isValid() {
response := handleRequest(request)
conn.Write(response)
}
}
func main() {
ln, err := net.Listen("tcp", ":1234")
if err != nil {
fmt.Printf("Error while openning the server: %s\n", err.Error())
return
} else {
defer ln.Close()
}
for {
conn, err := ln.Accept()
if err != nil {
fmt.Printf("Error while accepting the connection: %s\n", err.Error())
continue
}
go handleConnection(conn)
}
}