将XML文件从Flex应用程序写回到Rails服务器

我有一个XML文件，我想将其发送到Rails服务器.为此，我使用以下代码:

I have a XML-file, which I want to send to a rails server. To do so I use the following code:

 <mx:HTTPService id="dataService"
 result="resultHandler(event)"
 resultFormat="e4x"/>

在由保存按钮触发的功能中，我执行以下操作:

In a Function triggered by a save button, I do the following:

 var params:Object = {};
 params["xml_file"] = xmlDoc;
 dataService.method = "POST";
 dataService.url = "http://localhost:3000/containers";
 dataService.send(params);

不幸的是，总是出现问题(见下文).如果删除params var，它将运行GET Request ...

Unfortunately there is always the Problem (see below) appearing. If I remove the params var, it runs a GET Request...

[RPC Fault faultString ="HTTP请求错误" faultCode ="Server.Error.Request" faultDetail ="Error:[IOErrorEvent type =" ioError"bubble = false cancelable = false eventPhase = 2 text =" Error#2032:流费勒. URL: http://localhost:3000/containers ].URL:

[RPC Fault faultString="HTTP request error" faultCode="Server.Error.Request" faultDetail="Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032: Stream-Fehler. URL: http://localhost:3000/containers"]. URL: http://localhost:3000/containers"]

可能是什么问题?

感谢您的任何提示！ 马库斯

Thanks for any hints! Markus