R SOAP传递参数和打印

Question

    library(RCurl)

    headerFields =
    c(Accept = "text/xml",
    Accept = "multipart/*",
    'Content-Type' = "text/xml; charset=utf-8",
    SOAPAction = "XYZ")

    body = '<?xml version="1.0" encoding="utf-8"?>
   <soap:Envelope xmlns:xsi="XYZ" xmlns:xsd="XYZ" 
   xmlns:soap="XYZ/soap/envelope/">
   <soap:Body>
   <clientLogin xmlns="XYZ">
   <id>string</id>
   </clientLogin>
   </soap:Body>
   </soap:Envelope>'

   curlPerform(url = "XYZ",
                          httpheader = headerFields,
                          postfields = body
                          )

我正在使用上面的代码来获取我在body部分传递的每个ID的数据。我用“4AD，H5F等”ID替换“string”中的字符串

1. 如何创建循环以将ID列表传递到soap请求中，而不必手动输入每个请求的ID。

2. 如何从以下输出获取输出：

   curlPerform(url = "XYZ",
                         httpheader = headerFields,
                         postfields = body)
   

并在文件中解析/每次调用新ID时附加它<​​/ p>