javascript Access-Control-Allow-Origin 不允许 XMLHttpRequest Origin
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XMLHttpRequest Origin is not allowed by Access-Control-Allow-Origin
提问by Naftuli Kay
I'm trying to fetch some simple text over HTTP from JavaScript:
我正在尝试从 JavaScript 通过 HTTP 获取一些简单的文本：
$(function() {
$.get("http://mydomain.com/path", function(result) {
console.log(result);
});
});
The result should be text/html, but is basically only a simple key-value string, no HTML tags whatsoever. The page is in my control, but is supplied by a third-party (closed-source) so I can't modify the Java that serves out this page.
结果应该是text/html，但基本上只是一个简单的键值字符串，没有任何 HTML 标签。该页面在我的控制之下，但由第三方（封闭源代码）提供，因此我无法修改提供此页面的 Java。
How can I get the contents of this page from JavaScript?
如何从 JavaScript 获取此页面的内容？
回答by Craig White
You've simply gotta use either PHP/ASPyour serverside languageto retrieve the cross-domain request or use a service such as a cross domain ajax service created by Yahoo!.
您只需使用您的服务器端语言PHP/ASP来检索跨域请求或使用诸如由 Yahoo! 创建的跨域 ajax 服务之类的服务。
It uses JSONP which is allowed to do very strict cross-domain requests, but asking from Yahoo! they will retrieve any page on the internet.
它使用 JSONP，允许执行非常严格的跨域请求，但需要从 Yahoo! 他们将检索互联网上的任何页面。
http://james.padolsey.com/javascript/cross-domain-requests-with-jquery/
http://james.padolsey.com/javascript/cross-domain-requests-with-jquery/
回答by alex
You can't request that page because of Same Origin Policyunless that page has explicitly allowed you with CORS.
由于同源策略，您无法请求该页面，除非该页面明确允许您使用CORS。
Either proxy it server side, with a service such as YQL, get it as JSONP or get the other service to enable CORS for your domain.
使用 YQL 等服务代理它的服务器端，将其作为 JSONP 获取，或者获取其他服务来为您的域启用 CORS。
