Hi developers,
originally sent as bug report request, but got re-routed here: Problem: Connections established via gzcon (also used by packages e.g. vroom/readr) may end reading/connection prematurely (see https://stackoverflow.com/questions/79587028/read-csv-only-reads-a-fraction-of-rows-from-a-zipped-file-when-reading-from-url<https://stackoverflow.com/questions/79587028/read-csv-only-reads-a-fraction-of-rows-from-a-zipped-file-when-reading-from-url#comment140365314_79587028>) Reproducible example: addr <- "https://www1.ncdc.noaa.gov/pub/data/ghcn/daily/by_station/USW00014839.csv.gz"; # online/stream nrow(read.csv(gzcon(url(addr), text=T), header=F)) # [1] 1798 # local download.file(addr, destfile=basename(addr)) nrow(read.csv(gzcon(file(basename(addr), "r"), text=T), header=F)) # [1] 429498 # or nrow(read.csv(gzfile(basename(addr), "r"), header=F)) # [1] 429498 closeAllConnections() > sessionInfo() R version 4.5.0 (2025-04-11) Platform: aarch64-apple-darwin24.4.0 Running under: macOS Sequoia 15.4.1 likely to be platform independent. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
