write_file cannot write files with ".zip" extension

[MilesMcBain]

write_file cannot write .zip files. The issue seems to be in this switch statement in standardise_path:

readr/R/source.R

Line 161 in 31236cf

switch(compression,

Where the other zip functions create connections, readr::zipfile attempts to decompress the file file, which doesn't exist because we're trying to write it.

readr::write_file(charToRaw(letters), "./test.zip")
#> Error in utils::unzip(path, list = TRUE): zip file './test.zip' cannot be opened

^{Created on 2021-07-27 by the reprex package (v2.0.0)}

[jimhester]

Base R does not support writing to zip files from a connection. e.g. there is no write equivalent to unz().

However you can now use the archive package to do this.

readr::write_file(paste0(letters, collapse = ""), archive::archive_write("letters.zip", "letters"))

[MilesMcBain]

Ah sorry if I was unclear. I don't want to zip data. I have the raw data representing a zip file in the body of a http request. I can't write that to a .zip file on disk.

My work around was to write it with a different extension, then change the extension to zip after.

[minemR]

My work around was to use:

readr:::write_file_raw_(x, connection)

I guess that is quite bad, because the unexported function could change or be removed in next release...

[jimhester]

Perhaps just use base::writeBin() or possibly brio::write_file_raw() if you want to write bytes to disk and not do any transformations of the data.