api - 应用getForm时偶尔会得到 "attempt to apply non-function"错误

Question

我正在使用 getForm 从 api 中重复提取数据。有时程序完成，有时经过一定量的迭代后，我收到以下错误消息:

Error in curlPerform(url = url, curl = curl, .opts = .opts) : 
attempt to apply non-function
In addition: There were more than 50 warnings (use warnings() to see the first 50)
> traceback()
5: .Call("R_curl_easy_perform", curl, .opts, isProtected, .encoding, 
   PACKAGE = "RCurl")
4: curlPerform(url = url, curl = curl, .opts = .opts)
3: getURLContent(uri, .opts = .opts, .encoding = .encoding, binary = binary, 
   curl = curl)
2: getForm("https://xx", .params = parval)
1: fromJSON(getForm("https://xx", 
   .params = parval)) at #32

警告是:

In RCurlIconv(str, from = "C99", to = encoding) :
UTF-8 not supported iconv entries

谢谢你的帮助!

Answer 1

这只是一个下载错误，有时下载失败。在这种情况下，我只是提供了再次尝试下载的规定。