JavaScript与CGI通过XML进行数据传送

来源：互联网发布：linux切换图形界面命令编辑：程序博客网时间：2024/05/19 07:10

JavaScript与CGI通过XML进行数据传送

JavaScript部分程序

 var xmlHttpvar writeHttpfunction GetXmlHttpObject(){var xmlHttp=null;try { // Firefox, Opera 8.0+, Safari xmlHttp=new XMLHttpRequest(); }catch (e) { // Internet Explorer try  {  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");  } catch (e)  {  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");  } }return xmlHttp;}function update(){xmlHttp=GetXmlHttpObject()if (xmlHttp==null)  {  alert ("Browser does not support HTTP Request")  return  } var url="/cgi-bin/rtd.cgi"url=url+"?sid="+Math.random()xmlHttp.onreadystatechange=stateChangedxmlHttp.open("GET",url,true)xmlHttp.send(null)} function stateChanged() {     if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")    {         xmlDoc=xmlHttp.responseXML;         for(var i=0; i<3; i++)     {        document.getElementById("rtd"+(i+1)).value = xmlDoc.getElementsByTagName("para")[i].childNodes[0].nodeValue+" V";         }     /*     document.getElementById("rtd1").value = xmlDoc.getElementsByTagName("para")[0].childNodes[0].nodeValue+" V";     document.getElementById("rtd2").value = xmlDoc.getElementsByTagName("para")[1].childNodes[0].nodeValue+" V";     document.getElementById("rtd3").value = xmlDoc.getElementsByTagName("para")[2].childNodes[0].nodeValue+" V";         */       }}function load(){    setInterval(update, 1000);}function toPage(page){     window.location=page;}function writeOne(){writeHttp=GetXmlHttpObject()if (writeHttp==null)  {  alert ("Browser does not support HTTP Request")  return  } var url="/cgi-bin/write.cgi"url=url+"?sid="+Math.random()writeHttp.onreadystatechange=writeOneRespwriteHttp.open("GET",url,true)writeHttp.send(null);}function writeOneResp(){    if (writeHttp.readyState==4 || writeHttp.readyState=="complete")    {         xmlDoc2=writeHttp.responseXML;         window.alert(xmlDoc2.getElementsByTagName("para")[0].childNodes[0].nodeValue);     }}

CGI部分程序

#include <stdio.h>#include <stdlib.h>int main(){    printf("Content-type:text/xml\n\n");    printf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");    printf("<data>");    srand(time(0));    float rtd1=55+rand()%100/100.0;    float rtd2=110+rand()%100/100.0;    float rtd3=220+rand()%100/100.0;    printf("<para id=\"rtd1\">%.4f</para>", rtd1);    printf("<para id=\"rtd2\">%.4f</para>", rtd2);    printf("<para id=\"rtd3\">%.4f</para>", rtd3);    printf("</data>");    return 0;}

0 0