Exemple #1
0
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
Exemple #2
0
    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)
Exemple #3
0
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
Exemple #4
0
    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)