downloading ftp URL problems

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downloading ftp URL problems

Kris Thielemans-2

Hi

 

I’m try to get a file via ftp in EXTERNAL_PROJECT_ADD by specifying the URL. This takes a long time on my Windows machine using CMake 3.10.1 (and previous versions of CMake) as it needs multiple retries:

 

2>  -- Using src='ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip'

2>  -- Retrying...

2>  -- Using src='ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip'

2>  -- Retry after 5 seconds (attempt #2) ...

2>  -- Using src='ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip'

2>  -- Retry after 5 seconds (attempt #3) ...

2>  -- Using src='ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip'

2>  -- Retry after 15 seconds (attempt #4) ...

2>  -- Using src='ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip'

2>  -- Retry after 60 seconds (attempt #5) ...

2>  -- Using src='ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip'

-- [download 0% complete]

...

 

When using on https link, the download starts immediately.

 

Any suggestions why this happens, what I can do about it, or how I could specify an initial sleep period to skip the first retries (but I’m not sure if that’d help)?

 

Some more detail:

I’m using Windows 10 home with latest CMake installed via the msi.

 

Using the URL in a browser  (firefox) works fine but does need a ~5s wait before I get the “save” dialog box.

 

Checking the created download.cmake, it is just a loop with different sleep_seconds doing the following

 

Set(url “ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip”)

execute_process(COMMAND "${CMAKE_COMMAND}" -E sleep "${sleep_seconds}")

 

   file(

       DOWNLOAD

       "${url}" "C:/Users/krisf/Documents/devel/fftw-3.3.5-dll64.zip"

       SHOW_PROGRESS

       # no TIMEOUT

       STATUS status

       LOG log

   )

 

Thanks for your help

 

Kris Thielemans
Reader in Medical Imaging Physics at University College London,
Institute of Nuclear Medicine, UCL Hospital, Tower 5,
235 Euston Road, London NW1 2BU, UK

 

 


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