Error reading a URL

[becegato]

Hello everybody.
I need to read the files with a url address in a certain period of years, however they have changed the pattern in the filenames over the years, so before downloading I was trying to make a change to the read and unzip using:
if (stringr::str_detect(url, "2013-2t")) {
string_subset <- "2Q2013"
} else {
string_subset <- stringr::str_sub(url, start = 73, end = 78)
}
But it's not working.

Contnuo tendo o erro:

Error in download.file(url = url, destfile = temp, method = "auto", quiet = TRUE) :
cannot open URL 'http://ftp.dadosabertos.ans.gov.br/FTP/PDA/demonstracoes_contabeis/2013/2T2013.zip'

[M_AcostaCH]

@becegato

'http://ftp.dadosabertos.ans.gov.br/FTP/PDA/demonstracoes_contabeis/2013/2T2013.zip '

Im search the url but the site dont exist

You must verify well the pattern of changes in the links of each page

[becegato]

Yes, it does not exist, the correct one is http://ftp.dadosabertos.ans.gov.br/FTP/PDA/demonstracoes_contabeis/2013/2013-2t
but this one the program won't read, so I was trying to change it so that it read