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Update data_download.py #4

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23 changes: 20 additions & 3 deletions slrfield/utils/data_download.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,23 @@

from .try_download import tqdm_ftp

# ftp access
def ftp_access(server,src_dir):
"""
Access the ftp server to download the EOP file.

Usage:
>>> ftp_access(server,src_dir)

Parameters:
server -> [str] Server address
src_dir -> [str] Directory of the EOP file
"""
ftp = FTP(server)
ftp.login()
ftp.cwd(src_dir)
return ftp

def download_eop(out_days=7,dir_to=None):
"""
Download or update the Earth Orientation Parameters(EOP) file from IERS
Expand All @@ -32,17 +49,17 @@ def download_eop(out_days=7,dir_to=None):

if not path.exists(dir_to): makedirs(dir_to)
if not path.exists(dir_file):
ftp_access(server,src_dir)
ftp = ftp_access(server,src_dir)
desc = "Downloading the latest EOP '{:s}' from IERS".format(file)
tqdm_ftp(ftp,dir_to,file,desc)
else:
modified_time = datetime.fromtimestamp(path.getmtime(dir_file))
if datetime.now() > modified_time + timedelta(days=out_days):
remove(dir_file)
ftp_access(server,src_dir)
ftp = ftp_access(server,src_dir)
desc = "Updating EOP '{:s}' from IERS".format(file)
tqdm_ftp(ftp,dir_to,file,desc)
else:
print("EOP '{0:s}' in {1:s} is already the latest.".format(file,dir_to))

return dir_file
return dir_file