我的Codeigniter文件說

$CI->output->set_header("Access-Control-Allow-Origin: *");

$CI->output->set_header("Access-Control-Expose-Headers: Access-Control-Allow-Origin");

$CI->output->set_status_header(200);

$CI->output->set_content_type('application/json');

echo json_encode(array("city" => "dhaka"));

但我得到的http響應是：

Request URL:http://localhost/index.php/location/city

Request Method:POST

Status Code:200 OK

Connection:Keep-Alive

Content-Length:16

Content-Type:text/html

Date:Sun, 22 Jul 2012 10:27:32 GMT

Keep-Alive:timeout=5, max=100

Server:Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/0.9.8r DAV/2 PHP/5.3.6

X-Powered-By:PHP/5.3.6

即使在包含Access-Control-Expose-Headers：Access-Control-Allow-Origin之后,響應中也缺少標題Access-Control-Allow-Origin.我有關此標題的信息來源是Mozilla Developer Website

總結

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