Set HTTP Get Headers Javascript

我正在从不同于发送GET的服务器检索图像文件，我得到了两个文件，一个位于/var/www/html/test/image1.png的另一个服务器上，另一个文件位于/var/www/html/test/inside/image2.png。我得到的文件是这样的。我知道网址http://xxx.xxx.xx/test/image1.png和http://xxx.xxx.xx/test/inside/image2.png然后我做这个

function convertToDataURLviaCanvasBOTH(url, callback, outputFormat){
var img = new Image();
img.crossOrigin = 'Anonymous';
img.onload = function(){
    var canvas = document.createElement('CANVAS');
    var ctx = canvas.getContext('2d');
    var dataURL;
    canvas.height = this.height;
    canvas.width = this.width;
    ctx.drawImage(this, 0, 0);
    dataURL = canvas.toDataURL(outputFormat);
    callback(dataURL);
    canvas = null; 
};
img.src = url;
}
url1 = http://xxx.xxx.xx/test/image1.png;
url2 = http://xxx.xxx.xx/test/inside/image2.png
data1 = convertToDataURLviaCanvasBOTH(url1);
data2 = convertToDataURLviaCanvasBOTH(url2);

data1工作得很好，我把它拿回来了，但当它为url2疲劳时，它失败了，我得到了错误

Image from origin 'http://xxx.xx.xx.x' has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://sending-server.com' is therefore not allowed access.

当第二个只在第一个的子文件夹中时，为什么它适用于第一个而不适用于第二个？

在根文件目录下，我还有

Header always set Access-Control-Allow-Origin "http://sending-server.com"
Header always set Access-Control-Allow-Headers "origin, x-requested-with, content-type"
Header always set Access-Control-Allow-Methods "PUT, GET, POST, DELETE, OPTIONS"

在.htaccess文件中，它应该始终发送头

以下是url1 的请求标头

Accept:image/webp,image/*,*/*;q=0.8
Accept-Encoding:gzip, deflate, sdch
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Host:192.67.64.41
If-Range:"1083f-52648757feb05"
Origin:http://sending-server.com
Range:bytes=2596-2596
Referer:http://sending-server.com/info.html
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36

以及来自url2 的请求标头

Provisional headers are shown //THERE IS A WARING SYMBOL ON THIS LINE
Accept:image/webp,image/*,*/*;q=0.8
Origin:http://sending-server.com
Referer:http://sending-server.com/info.html
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36
X-DevTools-Emulate-Network-Conditions-Client-Id:A760326C-C02F-41C6-A4F6-4B46AA7BC1C3

感谢