Does anyone know if the crossdomain policy file has changed on salesforce.com?

You should definitely load the policy from the / services tree, the default policy at the root won't help. You need to download this policy https://www.salesforce.com/services/crossdomain.xml

I am uploading a file from flex to google docs. However, everything works in a local file, when we load the SWF file as S controls in Salesforce (sandbox), there is an error when connecting to google. See below:

Error:[FaultEvent fault=[RPC Fault faultString="Security error accessing url"
faultCode="Channel.Security.Error" faultDetail="Destination: DefaultHTTPS"] 
messageId="1F812836-1318-B845-AC01-F51AB1D11518" type="fault" bubbles=false 
cancelable=true eventPhase=2]

      

        
        
        
      

    

We tried the following solutions below, but nothing works: FLEX: - Add crossdomain.xml to bin-debug folder: below is the content of the cross domain policy.

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
     <allow-access-from domain="*" secure="false" />
<allow-http-request-headers-from domain="*" headers="*" secure="false" />
</cross-domain-policy>

      

        
        
        
      

    

• Initialization uses flash.system.security.allowinsecuredomain / allowdomain ("*").
• Also tried to establish connection.protocol in http Salesforce:
• Disable protocol security in the remote site settings o Settings -> Administration settings -> Security controls -> Remote site settings  URL: http://www.google.com.ph

No problem with Salesforce, but when initializing the load page, the security error will be displayed specifically in the onErrorFault function. Below are the code snippets:

<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" width="534" height="462" verticalScrollPolicy="off" horizontalScrollPolicy="off"
creationComplete="init()" showCloseButton="true" close="{this.closeWindow(event)}" roundedBottomCorners="true">
<mx:Script>
<![CDATA[

private function init():void{
        Security.allowInsecureDomain("*");
        //<salesforce:Connection id="apex" sendRequest="sendRequestListener(event)" serverUrl="http://www.salesforce.com/services/Soap/u/10.0" protocol="http"/>   
        RESTProxyTest();
        send_data();
        arrAddedFiles = new Array();
        this.uploadGrid.dataProvider= this.acFiles; 
        this.title = "Attachment: "+this.selectedTimeSheetDetail.Project.label;
}

public function RESTProxyTest():void
    {
        _conn = new NetConnection();
        _conn.addEventListener(AsyncErrorEvent.ASYNC_ERROR, doAsyncError);
        _conn.addEventListener(IOErrorEvent.IO_ERROR, doIOError);
        _conn.addEventListener(SecurityErrorEvent.SECURITY_ERROR, doSecurityError);
        _conn.addEventListener(NetStatusEvent.NET_STATUS, doNetStatus);
        _conn.objectEncoding = ObjectEncoding.AMF3;

        _conn.connect(_url);
        _responder = new Responder(onResult, onFault);  

    }

private function send_data():void {
        userRequest.url = getLoginURL();
        userRequest.addEventListener(ResultEvent.RESULT, httpResult);
        userRequest.addEventListener(FaultEvent.FAULT, onErrorFault); 
        userRequest.send();
    } 

private function onErrorFault(obj:FaultEvent):void
    {
        Alert.show("Error:"+obj.toString());
    }

private function httpResult(obj:ResultEvent):void
    {
        trace(obj.toString());

        var result:String = obj.result as String;       
        var pos:int = result.lastIndexOf("Auth=");
        var auth:String = result.substr(pos + 5);
        txtAuth.text = StringUtil.trim(auth);
        placeCall();
    }

protected function placeCall():void
    {
        trace("placeCall");
        var headers:Array = ["Authorization: " + "GoogleLogin auth=" + StringUtil.trim(txtAuth.text)];
        var postVars:Array = [];         
        var uri:String = "http://docs.google.com/feeds/documents/private/full?showfolders=true"; 
        _conn.call("RESTProxy.request", _responder, uri, "get", new Array(), postVars, headers);
    }

private function getLoginURL():String
    {
        var url:String = 'https://www.google.com/accounts/ClientLogin?accountType=HOSTED_OR_GOOGLE&' +
        'Email=' + this.session.config.gmail + '&' +
        'Passwd=' + this.session.config.password + '&service=writely'; 

        return url;
    }   
]]>
</mx:Script>

<mx:HTTPService id="userRequest" useProxy="false" method="POST" contentType="application/x-www-form-urlencoded" showBusyCursor="true"/>