Question

我试图在顶点之外调用一个页面，但它不起作用。当我单击顶点中的按钮时，会触发动态操作。这是一个javascript块，其代码如下：

var xmlhttp;
var name = document.getElementById('P1_X').value;
if (window.XMLHttpRequest){
  // code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
}
else{
  // code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}

xmlhttp.onreadystatechange=function(){
  if (xmlhttp.readyState==4 && xmlhttp.status==200){

    alert(xmlhttp.responseText);
  }
}
xmlhttp.setRequestHeader("Access-Control-Allow-Origin", "*");
xmlhttp.setRequestHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
xmlhttp.setRequestHeader("Access-Control-Max-Age", "3600");
xmlhttp.setRequestHeader("Access-Control-Allow-Headers", "x-requested-with");
xmlhttp.open("GET","http://92.109.55.51:7070/xander/rest/templates/" + name,true);

xmlhttp.send();

我收到以下错误没有 setRequestHeader行：
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://92.109.55.51:7070/xander/rest/templates/Test1. This can be fixed by moving the resource to the same domain or enabling CORS.

我已经浏览了互联网并尝试了我的标题（Source），如代码中所示，但我不知道在哪里放置标题部分。目前我得到了：
InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable

如何通过动态操作从顶层获取信息？

尝试从顶点请求页面时阻止了跨源请求

0 个答案: