[GitHub] [arrow] paleolimbot commented on issue #34779: [R] write_* methods can't have socketConnection as a sink

["paleolimbot (via GitHub)" <gi...@apache.org>]

paleolimbot commented on issue #34779:
URL: https://github.com/apache/arrow/issues/34779#issuecomment-1491948867

   Thank you for opening this...we should absolutely be able to write an IPC stream over a socket!
   
   I believe this is a result of the way we wrap an R connection with an OutputStream and/or InputStream. I believe there's a place where we attempt a seek to see if we can get a random access file (needed for some types of files like parquet and arrow non-stream files). I think we check `isSeekable(con)` but I think there are some types of connections where that returns `TRUE` even though any attempt to actually seek will fail.
   
   For reference: https://github.com/apache/arrow/blob/main/r/src/io.cpp#L210-L410


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