c974479b
 csaad
réorganisation de...
|
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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libwebsockets.h>
#include "serial.h"
#define MAX_FRAME_SIZE 1024
#define WAIT_DELAY 50
#define SERIAL_DEVICE "/dev/ttyACM0"
int sd=serialOpen(SERIAL_DEVICE,SERIAL_BOTH);
static int callback_http(
struct libwebsocket_context *this,
struct libwebsocket *wsi,enum libwebsocket_callback_reasons reason,
void *user,void *in,size_t len)
{
return 0;
}
static int callback_my(
struct libwebsocket_context * this,
struct libwebsocket *wsi,enum libwebsocket_callback_reasons reason,
void *user,void *in,size_t len)
{
static char *message=NULL;
static int msize=0;
switch(reason){
case LWS_CALLBACK_ESTABLISHED:
printf("connection established\n");
message=NULL;
// Declenchement d'un prochain envoi au navigateur
libwebsocket_callback_on_writable(this,wsi);
break;
case LWS_CALLBACK_RECEIVE:
// Ici sont traites les messages envoyes par le navigateur
printf("received data: %s\n",(char *)in);
if(write(sd,in,sizeof(char))!=1);
message=malloc(len+LWS_SEND_BUFFER_PRE_PADDING+LWS_SEND_BUFFER_POST_PADDING);
if(message==NULL){ perror("callback_my.malloc"); exit(EXIT_FAILURE); }
memcpy(message+LWS_SEND_BUFFER_PRE_PADDING,in,len);
// Declenchement d'un prochain envoi au navigateur
msize=len;
libwebsocket_callback_on_writable(this,wsi);
break;
case LWS_CALLBACK_SERVER_WRITEABLE:
// Ici sont envoyes les messages au navigateur
if(message!=NULL){
char *out=message+LWS_SEND_BUFFER_PRE_PADDING;
libwebsocket_write(wsi,(unsigned char *)out,msize,LWS_WRITE_TEXT);
free(message);
message=NULL;
}
break;
default:
break;
}
return 0;
}
static struct libwebsocket_protocols protocols[] = {
{
"http-only", // name
callback_http, // callback
0, // data size
0 // maximum frame size
},
{"myprotocol",callback_my,0,MAX_FRAME_SIZE},
{NULL,NULL,0,0}
};
int main(void) {
//port du serveur
int port=9000;
serialConfig(sd,B9600);
struct lws_context_creation_info info;
memset(&info,0,sizeof info);
info.port=port;
info.protocols=protocols;
info.gid=-1;
info.uid=-1;
struct libwebsocket_context *context=libwebsocket_create_context(&info);
if(context==NULL){
fprintf(stderr, "libwebsocket init failed\n");
return -1;
}
printf("starting server...\n");
while(1){
libwebsocket_service(context,WAIT_DELAY);
}
libwebsocket_context_destroy(context);
return 0;
}
|