VMware ESXi 读取版本信息

POST /sdk HTTP/1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.2344.106 Safari/537.36
Accept: */*
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 581

<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope
    xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <soap:Header>
        <operationID>00000001-00000001</operationID>
    </soap:Header>
    <soap:Body>
        <RetrieveServiceContent
            xmlns="urn:internalvim25">
            <_this xsi:type="ManagedObjectReference" type="ServiceInstance">ServiceInstance</_this>
        </RetrieveServiceContent>
    </soap:Body>
</soap:Envelope>