def get_meta_data(lmaid):
"""Get the _meta.xml file with the concert description."""
# relative path is concertid/concertid_meta.xml
reader = MetaXMLHandler()
hand = lma.archive_open("%s/%s_meta.xml" % (lmaid, lmaid))
try:
xml.sax.parse(hand, reader)
finally:
hand.close()
return reader.getData()
def get_filelist_data(lmaid):
"""Get the _files.xml file with the song listing."""
# relative path is concertid/concertid_files.xml
reader = FileXMLHandler()
hand = lma.archive_open("%s/%s_files.xml" % (lmaid, lmaid))
try:
xml.sax.parse(hand, reader)
finally:
hand.close()
return reader.getData()
def download_one_file(concert, song, targetdir, progress_bar):
"""Download one file, updating callback as necessary."""
# if there's an extra subdirectory, create it
filename = os.path.join(targetdir, os.path.normpath(song['name']))
(head, tail) = os.path.split(filename)
if not os.path.isdir(head):
os.mkdir(head)
# make sure we don't already have this one
filesize = int(song['size'])
if os.path.exists(filename):
# it's there--is it the right size?
if os.stat(filename).st_size == filesize:
return True
# not right size, just remove it
os.remove(filename)
# don't use os.path.join here, because the name is for remote system
downloaded = 0
chksum = hashlib.md5()
path = "%s/%s" % (concert.lmaid, song['name'])
rhand = lma.archive_open(path)
lhand = open(filename, "wb")
try:
data = rhand.read(BUFFER_SIZE)
while len(data) > 0:
downloaded += len(data)
lhand.write(data)
chksum.update(data)
if not progress_bar.update(downloaded):
break
data = rhand.read(BUFFER_SIZE)
except IOError:
# nothing really to do, but we want to catch this anyway.
pass
finally:
lhand.close()
rhand.close()
# now, make sure our checksum matches
if chksum.hexdigest() == song['md5']:
return True
# we failed, remove the partial download
os.remove(filename)
return False
