curl (version 4.2)

file_writer: File Writer

Description

Generates a closure that writes binary (raw) data to a file.

Usage

file_writer(path)

Arguments

path

file name or path on disk

Value

Function with signature writer(data = raw(), close = FALSE)

Details

The writer function automatically opens the file on the first write and closes when it goes out of scope, or explicitly by setting close = TRUE. This can be used for the data callback in multi_add() or curl_fetch_multi().

Examples

# NOT RUN {
# Doesn't open yet
tmp <- tempfile()
writer <- file_writer(tmp)

# Now it opens
writer(charToRaw("Hello!\n"))
writer(charToRaw("How are you?\n"))

# Close it!
writer(charToRaw("All done!\n"), close = TRUE)

# Check it worked
readLines(tmp)
# }

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