缺少 CORS 标头“Access-Control-Allow-Origin" [英] CORS header 'Access-Control-Allow-Origin' missing
问题描述
我正在从我的 asp.net 表单调用此函数,并在调用 ajax 时在 firebug 控制台上出现以下错误.
I'm calling this function from my asp.net form and getting following error on firebug console while calling ajax.
跨域请求被阻止:同源策略不允许读取位于 http://anotherdomain/test.json 的远程资源.(原因:缺少 CORS 标头Access-Control-Allow-Origin").
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://anotherdomain/test.json. (Reason: CORS header 'Access-Control-Allow-Origin' missing).
var url= 'http://anotherdomain/test.json';
$.ajax({
url: url,
crossOrigin: true,
type: 'GET',
xhrFields: { withCredentials: true },
accept: 'application/json'
}).done(function (data) {
alert(data);
}).fail(function (xhr, textStatus, error) {
var title, message;
switch (xhr.status) {
case 403:
title = xhr.responseJSON.errorSummary;
message = 'Please login to your server before running the test.';
break;
default:
title = 'Invalid URL or Cross-Origin Request Blocked';
message = 'You must explictly add this site (' + window.location.origin + ') to the list of allowed websites in your server.';
break;
}
});
我已经做了替代方法,但仍然无法找到解决方案.
I've done alternate way but still unable to find the solution.
注意:我没有进行服务器端(API/URL)更改的服务器权限.
Note: I've no server rights to make server side(API/URL) changes.
推荐答案
当您尝试访问另一个域的资源时,通常会发生这种情况.
This happens generally when you try access another domain's resources.
这是一项安全功能,可避免每个人自由访问该域的任何资源(例如,可以访问该域的任何资源以在盗版域上拥有完全相同的网站副本).
This is a security feature for avoiding everyone freely accessing any resources of that domain (which can be accessed for example to have an exact same copy of your website on a pirate domain).
响应的标头,即使是 200OK 也不允许其他来源(域、端口)访问资源.
The header of the response, even if it's 200OK do not allow other origins (domains, port) to access the ressources.
如果您是两个域的所有者,则可以解决此问题:
You can fix this problem if you are the owner of both domains:
要更改它,您可以在请求的域文件的 .htaccess 中写入:
To change that, you can write this in the .htaccess of the requested domain file:
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
如果您只想授予对一个域的访问权限,.htaccess 应如下所示:
If you only want to give access to one domain, the .htaccess should look like this:
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin 'https://my-domain.tdl'
</IfModule>
解决方案 2:以正确的方式设置标题
如果你把它设置到请求文件的响应头中,你将允许每个人访问资源:
Solution 2: set headers the correct way
If you set this into the response header of the requested file, you will allow everyone to access the ressources:
Access-Control-Allow-Origin : *
或
Access-Control-Allow-Origin : http://www.my-domain.com
和平与代码;)
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