def IERS_A_in_cache():
"""
Check if the IERS Bulletin A table is locally cached.
"""
url_key = iers.IERS_A_URL
# The below code which accesses ``urlmapfn`` is stolen from
# astropy.utils.data.download_file()
try:
dldir, urlmapfn = _get_download_cache_locs()
except (IOError, OSError) as e:
msg = 'Remote data cache could not be accessed due to '
estr = '' if len(e.args) < 1 else (': ' + str(e))
warnings.warn(CacheMissingWarning(msg + e.__class__.__name__ + estr))
return False
with _open_shelve(urlmapfn, True) as url2hash:
# TODO: try to figure out how to test this in the unicode case
if str(url_key) in url2hash:
return True
return False
def save_fits(self, savepath, link_cache='hard'):
"""
Save a FITS file to savepath
Parameters
----------
savepath : str
The full path to a FITS filename, e.g. "file.fits", or
"/path/to/file.fits".
link_cache : 'hard', 'sym', or False
Try to create a hard or symbolic link to the astropy cached file?
If the system is unable to create a hardlink, the file will be
copied to the target location.
"""
from warnings import warn
self.get_fits()
try:
dldir, urlmapfn = aud._get_download_cache_locs()
except (IOError, OSError) as e:
msg = 'Remote data cache could not be accessed due to '
estr = '' if len(e.args) < 1 else (': ' + str(e))
warn(aud.CacheMissingWarning(msg + e.__class__.__name__ + estr))
with aud._open_shelve(urlmapfn, True) as url2hash:
if str(self._target) in url2hash:
target = url2hash[str(self._target)]
else:
raise IOError("Cached file not found / does not exist.")
if link_cache == 'hard':
try:
os.link(target, savepath)
except (IOError, OSError, AttributeError) as e:
shutil.copy(target, savepath)
elif link_cache == 'sym':
try:
os.symlink(target, savepath)
except AttributeError:
raise OSError('Creating symlinks is not possible on this OS.')
else:
shutil.copy(target, savepath)
def IERS_A_in_cache():
"""
Check if the IERS Bulletin A table is locally cached.
"""
url_key = iers.IERS_A_URL
# The below code which accesses ``urlmapfn`` is stolen from
# astropy.utils.data.download_file()
try:
dldir, urlmapfn = _get_download_cache_locs()
except (IOError, OSError) as e:
msg = 'Remote data cache could not be accessed due to '
estr = '' if len(e.args) < 1 else (': ' + str(e))
warnings.warn(CacheMissingWarning(msg + e.__class__.__name__ + estr))
return False
with _open_shelve(urlmapfn, True) as url2hash:
# TODO: try to figure out how to test this in the unicode case
if str(url_key) in url2hash:
return True
return False
def save_fits(self, savepath, link_cache='hard'):
"""
Save a FITS file to savepath
Parameters
----------
savepath : str
The full path to a FITS filename, e.g. "file.fits", or
"/path/to/file.fits".
link_cache : 'hard', 'sym', or False
Try to create a hard or symbolic link to the astropy cached file?
If the system is unable to create a hardlink, the file will be
copied to the target location.
"""
from warnings import warn
self.get_fits()
try:
dldir, urlmapfn = aud._get_download_cache_locs()
except (IOError, OSError) as e:
msg = 'Remote data cache could not be accessed due to '
estr = '' if len(e.args) < 1 else (': ' + str(e))
warn(aud.CacheMissingWarning(msg + e.__class__.__name__ + estr))
with aud._open_shelve(urlmapfn, True) as url2hash:
if str(self._target) in url2hash:
target = url2hash[str(self._target)]
else:
raise IOError("Cached file not found / does not exist.")
if link_cache == 'hard':
try:
os.link(target, savepath)
except (IOError, OSError, AttributeError) as e:
shutil.copy(target, savepath)
elif link_cache == 'sym':
try:
os.symlink(target, savepath)
except AttributeError:
raise OSError('Creating symlinks is not possible on this OS.')
else:
shutil.copy(target, savepath)