带有 R 的 Web API：VIES 增值税验证

【问题标题】：web API with R: VIES VAT validation带有 R 的 Web API：VIES 增值税验证
【发布时间】：2022-01-05 02:09:12
【问题描述】：

我想使用 R 和 VIES 网站验证客户的增值税信息。

到目前为止，我已经尝试过this method

library(curl)
library(xml2)
library(httr)
library(rvest)
url = 'http://ec.europa.eu/taxation_customs/vies/viesquer.do?ms=FR&iso=FR&vat=23489967794&name=&companyType=&street1=&postcode=&city=&requesterMs=FR&requesterIso=FR&requesterVat=23489967794&BtnSubmitVat=Verify';
test <- GET(url)
rawToChar(test$content)

问题是，这给了我一个只包含奇怪输出的内容，比如:{\"servletContext\

有人知道如何执行此操作吗？他们有可用的 SOAP API，但我还没有找到如何使用它，wsdl 定义是here

【问题讨论】：

标签： r api soap

【解决方案1】：

不确定您所追求的响应类型。这是通过 html 使用 headers 规范：

library(rvest)
library(httr)

headers = c(
  "User-Agent" = "Safari/537.36",
  "Accept" = "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9"
)

params = list(
  "ms" = "FR",
  "iso" = "FR",
  "vat" = "23489967794",
  "name" = "",
  "companyType" = "",
  "street1" = "",
  "postcode" = "",
  "city" = "",
  "requesterMs" = "FR",
  "requesterIso" = "FR",
  "requesterVat" = "23489967794",
  "BtnSubmitVat" = "Verify"
)

r <- httr::GET(url = "https://ec.europa.eu/taxation_customs/vies/viesquer.do", httr::add_headers(.headers=headers), query = params)
r |> content() |> html_element('.validStyle') |> html_text()

【讨论】：