download.file() yields incomplete files with method="internal"

Hi Jan!

* Jan.Kleinn at partnerre.com <Jan.Kleinn at partnerre.com> [060615 15:10]:
Dear all,

as the bug # 7991 is flagged not-reproducible, let me give you some pieces
of code, as I have the same or similar problem. The problem always shows up
with the first example (a small text file) and only sometimes (but without
obvious pattern) with the second example, which is a binary file.

download.file("ftp://ftp.nhc.noaa.gov/pub/atcf/btk/bal012006.dat",
"C:/temp/bal012006.dat", method = 'internal', mode = 'w', cacheOK = FALSE)
trying URL 'ftp://ftp.nhc.noaa.gov/pub/atcf/btk/bal012006.dat'
ftp data connection made, file length 5110 bytes
opened URL
downloaded 0 bytes

Warning message:
downloaded length 0 != reported length 5110
when I tried the first example (Windows NT, R 2.3.1), it worked
correctly two times, and then gave exactly the error message you cited
in the third run.

The second example worked once, and then gave the behaviour cited by
you, only the downloaded length differed. Specs:
version
_                         
platform       i386-pc-mingw32           
arch           i386                      
os             mingw32                   
system         i386, mingw32             
status                                   
major          2                         
minor          3.1                       
year           2006                      
month          06                        
day            01                        
svn rev        38247                     
language       R                         
version.string Version 2.3.1 (2006-06-01)
win.version()
[1] "Windows NT 4.0 (build 1381) Service Pack 6"

No problems on Linux, R 2.3.1 (after replacing "C:/temp" by /tmp/).

Regards,

Johannes

download.file("ftp://ftp.nhc.noaa.gov/pub/atcf/aid_public/aal012006.dat.gz",
 "C:/temp/aal012006.dat.gz", method = 'internal', mode = 'wb', cacheOK =
FALSE)
trying URL 'ftp://ftp.nhc.noaa.gov/pub/atcf/aid_public/aal012006.dat.gz'
ftp data connection made, file length 173760 bytes
opened URL
downloaded 155Kb

Warning message:
downloaded length 159140 != reported length 173760

Finally, is the spec of the system I'm working on:
version
               _
platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          3.1
year           2006
month          06
day            01
svn rev        38247
language       R
version.string Version 2.3.1 (2006-06-01)
win.version()
[1] "Windows XP Professional (build 2600) Service Pack 2.0"

Many thanks in advance and best regards,
Jan

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Dr. Johannes Ranke                 jranke at uni-bremen.de
UFT Bremen, Leobenerstr. 1         +49 421 218 8971 
D-28359 Bremen                     http://www.uft.uni-bremen.de/chemie/ranke

download.file() yields incomplete files with method="internal"

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