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分享cgi和应用层共享内存怎么实现在网页上动态刷新
html有个单选按钮提交表单后跳转到cgi程序，cgi内部创建共享内存和应用层共享数据，cgi读取数据并显示，如何实现同步和网页动态刷新。或者实现点击单选按钮跳转到另外一个html页面，html页面文本框显示动态数据html和cgi学的不怎么样
下边是cgi源码
cgi提交单选按钮mpu6050表单后跳转到上面表单，下边贴html源码[code=html<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>welcome page3</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="cgi-bin/cmd.cgi">
<p>led点灯------------------------蜂鸣器--------------------------mpu6050数据--------------</p>
<p>led_on
<input type="radio" name="radio" id="on" value="led_on" />
<label for="on"></label>
-------------------beep_on
<input type="radio" name="radio" id="on2" value="beep_on" />
---------------------------
<input type="radio" name="radio" id="on3" value="mpu6050" />
-----------------
</p>
<p>led_off
<input type="radio" name="radio" id="off" value="led_off" />
<label for="off"></label>
------------------ beep_off
<input type="radio" name="radio" id="off2" value="beep_off" />
<label for="off2"></label>
--------------------------------------------------- </p>
<p>
<input type="submit" name="button1" id="button1" value="提交" />
</p>
<p>说明led_on:cmd=1,led_off:cmd=2,beep_on:cmd=3,beep_off:cmd=4,mpu6050:cmd=5</p>
</form>
<p> </p>
</body>
</html>
][/code]
cgi和应用层共享内存，应用层共享代码在下边
下边是cgi源码#include "cgi_head.h"
int msgid;
char *radio[]={"led_on","led_off","beep_on","beep_off","mpu6050"};
int radio_serult;
void shm_read(void)
{
kill(sh->pid,SIGUSR1);
fprintf(cgiOut,"gyro x=%d,gyro y=%d,gyro z=%d\n",sh->data.gyro.x,sh->data.gyro.y,sh->data.gyro.z);
fprintf(cgiOut,"accel x=%d,accel y=%d,accel z=%d\n",sh->data.accel.x,sh->data.accel.y,sh->data.accel.z);
fprintf(cgiOut,"temp=%d\n",sh->data.temp);
}
void cmd_send(struct msg info)
{
int ret;
fprintf(cgiOut,"已选中%s,cmd=%d\n",radio[radio_serult],info.text[0]);
ret=msgsnd(msgid,&info,sizeof(info)-sizeof(info.type),0);
if(ret<0)
{
fprintf(cgiOut,"msgsnd fail\n");
exit(EXIT_FAILURE);
}
}
int cgiMain(void)
{
key_t key;
int ret;
struct msg info;
cgiHeaderContentType("text/html\n");
fprintf(cgiOut,"<html><title>welcome to page2</title>\n");
fprintf(cgiOut,"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />");
fprintf(cgiOut,"<body>\n");
key=ftok("/www",'a');
msgid=msgget(key,IPC_CREAT|0666);
info.type=100;
if(msgid==-1)
{
fprintf(cgiOut,"msgget fail\n");
exit(EXIT_FAILURE);
}
if(cgiFormRadio("radio",radio,5,&radio_serult,0)==cgiFormSuccess)
{
switch(radio_serult)
{
case 0:
info.text[0]=1;
cmd_send(info);
break;
case 1:
info.text[0]=2;
cmd_send(info);
break;
case 2:
info.text[0]=3;
cmd_send(info);
break;
case 3:
info.text[0]=4;
cmd_send(info);
break;
default:
fprintf(cgiOut,"hello world\n");
if(shm_create()!=0)
{
fprintf(cgiOut,"shm_create\n");
exit(EXIT_FAILURE);
}
shm_read();
break;
}
}
fprintf(cgiOut,"</body>\n</html>\n");
return 0;
}
cgi提交单选按钮mpu6050表单后跳转到上面表单，下边贴html源码[code=html<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>welcome page3</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="cgi-bin/cmd.cgi">
<p>led点灯------------------------蜂鸣器--------------------------mpu6050数据--------------</p>
<p>led_on
<input type="radio" name="radio" id="on" value="led_on" />
<label for="on"></label>
-------------------beep_on
<input type="radio" name="radio" id="on2" value="beep_on" />
---------------------------
<input type="radio" name="radio" id="on3" value="mpu6050" />
-----------------
</p>
<p>led_off
<input type="radio" name="radio" id="off" value="led_off" />
<label for="off"></label>
------------------ beep_off
<input type="radio" name="radio" id="off2" value="beep_off" />
<label for="off2"></label>
--------------------------------------------------- </p>
<p>
<input type="submit" name="button1" id="button1" value="提交" />
</p>
<p>说明led_on:cmd=1,led_off:cmd=2,beep_on:cmd=3,beep_off:cmd=4,mpu6050:cmd=5</p>
</form>
<p> </p>
</body>
</html>
][/code]
cgi和应用层共享内存，应用层共享代码在下边
#include "head.h"
void handler(int sig)
{
}
void *pthread_for_mpu6050(void *arg)
{
key_t key;
pid_t shmpid;
int shmid;
int fd;
struct shared *sh;
union mpu6050_data msg;
key=ftok("/www",500);
signal(SIGUSR1,handler);
if(key==-1)
{
perror("shm ftok");
exit(EXIT_FAILURE);
}
shmid=shmget(key,64,0666|IPC_CREAT|IPC_EXCL);
if(shmid<0)
{
if(errno==EEXIST)
{
shmid=shmget(key,sizeof(struct shared),0666);
}
else
{
perror("shmget");
exit(EXIT_FAILURE);
}
}
printf("shmid=%d\n",shmid);
if((void *)-1==(sh=(struct shared *)shmat(shmid,NULL,0)))
{
perror("shmat");
exit(EXIT_FAILURE);
}
printf("-----------------------\n");
printf("sh=%p\n",sh);
sh->pid=getpid();
printf("sh->pid=%d\n",sh->pid);
// pause();
printf("***********************\n");
#if 1
sh->data.gyro.x=msg.gyro.x=10;
sh->data.gyro.y=msg.gyro.y=10;
sh->data.gyro.z=msg.gyro.z=10;
sh->data.accel.x=msg.accel.x=20;
sh->data.accel.y=msg.accel.y=20;
sh->data.accel.z=msg.accel.z=20;
sh->data.temp=msg.temp=30;
// fd=open("/dev/mpu6050",O_RDWR);
// while(1)
// {
//写shm
// ioctl(fd,GET_GYRO,&(sh->data));
printf("gyro x=%d,gyro y=%d,gyro z=%d\n",sh->data.gyro.x,sh->data.gyro.y,sh->data.gyro.z);
sleep(1);
// ioctl(fd,GET_ACCEL,&(sh->data));
printf("accel x=%d,accel y=%d,accel z=%d\n",sh->data.accel.x,sh->data.accel.y,sh->data.accel.z);
sleep(1);
// ioctl(fd,GET_TEMP,&(sh->data));
printf("temp=%d\n",sh->data.temp);
sleep(1);
// pause();
// }
#endif
}
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