如何使用 R 对 EUR-Lex API 进行 SOAP 请求?

How to do a SOAP request for EUR-Lex API with R?

您如何使用 R 为 EUR-Lex 的 API 请求 SOAP

EUR-Lex 是一个包含许多法律行为的欧盟数据库。在他们的网络服务手册中,他们描述了他们的 SOAP 系统,但没有描述如何使用 R。我已经尝试使用 httrRCurl 一段时间了,但没有成功。我想使用 R 而不是 SOAPUI。

这里有人有这方面的经验吗?

根据下面的link,我是不是应该这样定义正文?

body <- "<sear:searchRequest>
<sear:expertQuery>${expert query}</sear:expertQuery> <sear:page>${page}</sear:page>
<sear:pageSize>${pageSize}</sear:pageSize> <sear:searchLanguage>${search language
</sear:searchLanguage>
          </sear:searchRequest>"

然后如何将其与 headerfields 结合使用 RCurlhttr 包?

以下三个答案似乎相关,但我不知道如何将它们应用到我的 EUR-Lex 示例中:

  1. How to convert SOAP request curl to RCurl
  2. SOAP Client with WSDL for R
  3. SOAP request in R

EUR-Lex API links:

  1. WSDL:https://eur-lex.europa.eu/eurlex-ws?wsdl
  2. 手动:https://eur-lex.europa.eu/content/tools/webservices/SearchWebServiceUserManual_v2.00.pdf

您链接到的答案有很好的例子可供参考。添加来自 WSDL 的各种 URL 和来自手册的信息,您最终得到以下代码。

不幸的是,由于 EUR-Lex 安全限制,我无法对此进行测试(你需要他们提供的用户名和密码,我假设你有),但它至少应该让你走上正轨.

library(RCurl)

headerFields =
  c(Accept = "text/xml",
    Accept = "multipart/*",
    'Content-Type' = "text/xml; charset=utf-8",
    SOAPAction = "https://eur-lex.europa.eu/EURLexWebService/doQuery")

body = '<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:sear="http://eur-lex.europa.eu/search">
    <soap:Header>
        <wsse:Security soap:mustUnderstand="true" xmlns:wsse="http://docs.oasisopen.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
        <wsse:UsernameToken wsu:Id="UsernameToken-3" xmlns:wsu="http://docs.oasisopen.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
        <wsse:Username>${EUR-Lex username}</wsse:Username>
        <wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-
wss-username-token-profile-1.0#PasswordText">${WS password}</wsse:Password>
        </wsse:UsernameToken>
        </wsse:Security>
   </soap:Header> 
   <soap:Body>
      <sear:searchRequest>
         <sear:expertQuery>${expert query}</sear:expertQuery>
         <sear:page>${page}</sear:page>
         <sear:pageSize>${pageSize}</sear:pageSize>
         <sear:searchLanguage>${search language}</sear:searchLanguage>
      </sear:searchRequest>
   </soap:Body>
</soap:Envelope>'

reader = basicTextGatherer()

curlPerform(url = "https://eur-lex.europa.eu/EURLexWebService",
                          httpheader = headerFields,
                          postfields = body,
                          writefunction = reader$update
                          )

xml <- reader$value()
xml