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lbl-ensdf-fetcher.py

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#!/usr/bin/env python
'''
This fetches ENSDF files from ie.lbl.gov for libmore.
Set MORE_PHYS_FETCHER to point to this script.
'''

import sys, os
try:
    nuc = sys.argv[1]
    target = sys.argv[2]
    #print 'target=',target
except IndexError:
    print '''
Usage: lbl-ensdf-fetcher.py local_file_path NUC
       NUC is [Abreviated name]-[mass number]
       If using with libmore, set MORE_PHYS_FETCHER to point to me
'''

override = os.getenv('MORE_ENSDF_DIR',None)
if override:
    target = override

#print 'nuc="%s", target="%s"'%(nuc,target)
import os
if os.path.exists(target):
    #print 'Using previously downloaded',target
    sys.exit(0)

name,A = nuc.split('-')
mlen=len(A)
filename = '%(a)03d%(n)s.ens'%{'n':name,'a':int(A)}
url = 'http://ie.lbl.gov/databases/data/%(a)03d/%(a)03d%(n)s/%(a)03d%(n)s.ens'%{'n':name,'a':int(A)}
print url,'-->',target


err_target = target + '/' + filename + '.HTTPError'
print 'err_target =',err_target
if os.path.exists(err_target):
    errfile = open(err_target,'r')
    print 'Previous download of',nuc,'failed with',errfile.readline()
    sys.exit(0)


from urllib2 import urlopen, HTTPError
try:
    response = urlopen(url)
except HTTPError, err:
    err = str(err)
    print 'HTTPError: "%s"'%err
    errfile = open(err_target,'w')
    errfile.write(err)
    errfile.close()
    if '404' in err:
        sys.exit(0)
    sys.exit(1)

data = []
for line in response.readlines():
    data.append(line.strip())

if '.bz2' in target:
    import bz2
    file = bz2.BZ2File(target,"w")
else:
    file = open(target,"w")

# Final file must have lines of 80 spaced padded characters and
# terminated in DOS style.
for line in data:
    line = (3-mlen)*' ' + line
    while (len(line) < 80):
        line += ' '
    file.write(line + '\r\n')

file.close

sys.exit(0)

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