当我尝试使用来自 segment.io 网站的示例“入门”javascript 代码加载网页时，我遇到了跨源资源共享 (CORS) 错误。下面是html本身。我没有在出售此页面的 play 2.1.3 服务器上设置任何标题，但我认为这不是必需的，因为其他用户向我保证他们运行此页面没有任何问题。：
<html>
<head>
<script type="text/javascript">
window.analytics=window.analytics||[],window.analytics.methods=["identify","group","track","page","pageview","alias","ready","on","once","off","trackLink","trackForm","trackClick","trackSubmit"],window.analytics.factory=function(t){return function(){var a=Array.prototype.slice.call(arguments);return a.unshift(t),window.analytics.push(a),window.analytics}};for(var i=0;i<window.analytics.methods.length;i++){var key=window.analytics.methods[i];window.analytics[key]=window.analytics.factory(key)}window.analytics.load=function(t){if(!document.getElementById("analytics-js")){var a=document.createElement("script");a.type="text/javascript",a.id="analytics-js",a.async=!0,a.src=("https:"===document.location.protocol?"https://":"http://")+"cdn.segment.io/analytics.js/v1/"+t+"/analytics.min.js";var n=document.getElementsByTagName("script")[0];n.parentNode.insertBefore(a,n)}},window.analytics.SNIPPET_VERSION="2.0.9",
window.analytics.load("**my_key_here**");
window.analytics.page();
</script>
</head>
<body>
</body>
</html>
当我使用浏览器加载此页面时，我在 javascript 控制台上看到以下错误：
[Error] Failed to load resource: Origin http://localhost:9000 is not allowed by Access-Control-Allow-Origin. (p, line 0)
[Error] XMLHttpRequest cannot load http://api.segment.io/v1/p. Origin http://localhost:9000 is not allowed by Access-Control-Allow-Origin. (localhost, line 0)
有任何想法吗？即使在segment.io 网站上，也没有提到CORS 应该只是使用javascript 客户端发布事件的问题。