如何从FlexWebService传递授权标头?

简化示例:

var ws:WebService = new WebService();
ws.wsdl = "http://localhost:8000/api/service.wsdl"

var encoder:Base64Encoder = new Base64Encoder();
encoder.insertNewLines = false;
encoder.encode("SomeUser:SomePassword");

ws.httpHeaders = {AUTHORIZATION : "Basic " + encoder.toString()};

ws.loadWSDL();

var operation:AbstractOperation = ws.get_info;
operation.send();

我得到一个错误:

Error #2096: The HTTP request header AUTHORIZATION cannot be set via ActionScript.

我的服务器根目录中还有crossdomain.xml文件( http://localhost:8000/crossdomain.xml )但是flex从未调用过它(我从日志文件中知道)。我仍将提供此文件:

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
    <allow-access-from domain="*"/>
    <site-control permitted-cross-domain-policies="all"/>
    <allow-http-request-headers-from domain="*" headers="*"/>
</cross-domain-policy>

齐诺维