xml – 如何发送SOAP请求？

我感到困惑,只是发送SOAP请求如何？我试图这样做的方式是将我的SOAP请求(如下所示)保存为：testRequest.xml.

POST /MobileCashPayout.asmx HTTP/1.1
Host: 192.168.1.80
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length
<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
<soap12:Body>
<Payout xmlns="http://www.mycel.com/">
<Username>string</Username>
<Password>string</Password>
<referenceID>string</referenceID>
<sourceMsisdn>string</sourceMsisdn>
<destMsisdn>string</destMsisdn>
<Amount>decimal</Amount>
<MobilePin>string</MobilePin>
<cashInformation>string</cashInformation>
<merchantName>string</merchantName>
</Payout>
</soap12:Body>
</soap12:Envelope>

然后我用浏览器打开文件(testRequest.xml),以便它被发送..

我得到的回报是一条错误消息：
XML解析错误：语法错误
位置：localhost / projects / test.xml
行号1,列1：POST /MobileCashPayout.asmx HTTP / 1.1
^

我发错了吗？
请帮我出来