Using Host and Upload Domains that Differ from One Another

Supported technologies:

Usually Adobe Flash Player does not allow an swf application to access data that resides outside a domain where the application is hosted. It means that you usually cannot host Flash Uploader on one domain and upload files to another. However, you can manage this task by implementing cross-domain policy for Flash applications.

To allow Flash Uploader to upload files to some target server you should create the cross-domain policy file, named crossdomain.xml, and place it to the root folder of the target server.

Suppose, Flash Uploader is hosted in a server1.com server, whereas it requires to upload files to a server2.com server. In this case files should be placed as follows:

The cross-domain policy file have to be like in the snippet below:

<cross-domain-policy>
   <site-control permitted-cross-domain-policies="all"/>
   <allow-access-from domain="server1.com" to-ports="*"/>
   <allow-http-request-headers-from domain="server1.com" headers="*"/>
</cross-domain-policy>

And Flash Uploader should be configured like follows:

<aur:ImageUploaderFlash ID="Uploader1" runat="server" 
   LicenseKey="XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXXX;YYYYY-YYYYY-YYYYY-YYYYY-YYYYY-YYYYYY">
   <UploadSettings ActionUrl="http://server2.com/upload.aspx" />
</aur:ImageUploaderFlash>

<?php
   $uploader = new ImageUploaderFlash("Uploader1");
   $uploader->setLicenseKey("XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXXX;YYYYY-YYYYY-YYYYY-YYYYY-YYYYY-YYYYYY");
   $uploader->getUploadSettings()->setActionUrl("http://server2.com/upload.php");
   $uploader->render();
?>

 var fu = $au.imageUploaderFlash({
	id: 'Uploader1',
	licenseKey: "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX-XXXXXX;YYYYY-YYYYY-YYYYY-YYYYY-YYYYY-YYYYYY",
	uploadSettings: { actionUrl:"http://server2.com/upload.asp" }
});
fu.writeHtml();