允许我的API通过AJAX访问

我有一个API，它在服务器上获取一些日期。

public function post_events()
{
    header('Access-Control-Allow-Origin: *');
    header('Access-Control-Allow-Methods: GET, POST');
    header("Access-Control-Allow-Headers: X-Requested-With");
    $city = Input::post('city','all');
    $c = Model_chart::format_chart($city);
    return $this->response($c);
}

它适用于通常的卷曲方法。但我试图在Angular.js上使用$http访问它，结果出现了这个错误。

XMLHttpRequest无法加载http://event.deremoe.com/vendor/events.json.不请求的上存在"Access Control Allow Origin"标头资源原点'http://app.event.chart因此不允许通道

正如您所看到的，我已经在函数中添加了头。我还检查了curl，当我调用api时，会附加标题Access Control Allow Origin。

我这里缺了什么吗？

更多信息：这是通过正常卷曲返回给我的头信息。

Remote Address:104.28.19.112:80
Request URL:http://event.deremoe.com/vendor/events.json
Request Method:OPTIONS
Status Code:404 Not Found
Request Headersview source
Accept:*/*
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Access-Control-Request-Headers:accept, content-type
Access-Control-Request-Method:POST
Connection:keep-alive
Host:event.deremoe.com
Origin:http://app.event.chart
Referer:http://app.event.chart/
User-Agent:Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.120 Safari/537.36
Response Headersview source
CF-RAY:16f687416fe30c35-SEA
Connection:keep-alive
Content-Encoding:gzip
Content-Type:text/html; charset=UTF-8
Date:Thu, 25 Sep 2014 10:27:17 GMT
Server:cloudflare-nginx
Set-Cookie:__cfduid=d1a9e4283faacc0a2b029efef586b6b931411640837342; expires=Mon, 23-Dec-2019 23:50:00 GMT; path=/; domain=.deremoe.com; HttpOnly
Transfer-Encoding:chunked
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