1f48dd44
 mdelapor
mise en ligne du ...
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libwebsockets.h>
#include <stdbool.h>
#include <unistd.h>
#include "serial.c"
#define MAX_FRAME_SIZE 1024
#define WAIT_DELAY 50
#define SERIAL_DEVICE "/dev/ttyAMA0"
int sd;
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;
static char oldC = 0;
static bool boole = 1;
char * input = "a";
char c;
message=malloc(1+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,(void*)input,1);
// Declenchement d'un prochain envoi au navigateur
msize=1;
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_SERVER_WRITEABLE:
// Ici sont envoyes les messages au navigateur
char *out=message+LWS_SEND_BUFFER_PRE_PADDING;
read(sd,&c,sizeof(char));
if(oldC != c){
oldC = c;
boole = !boole;
if(boole){
system("sudo cp soundLevel.mp3 ./sound.mp3");
}else system("sudo cp Raindrops-noise.mp3 ./sound.mp3");
libwebsocket_write(wsi,(unsigned char *)out,msize,LWS_WRITE_TEXT);
}
libwebsocket_callback_on_writable(this, wsi);
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) {
char *out="a"+LWS_SEND_BUFFER_PRE_PADDING;
int port=9000;
struct lws_context_creation_info info;
memset(&info,0,sizeof info);
int c=0;
sd=serialOpen(SERIAL_DEVICE,SERIAL_BOTH);
serialConfig(sd,B9600);
if(write(sd,&c,sizeof(char))!=1){ perror("main.write"); exit(-1); }
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;
}
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