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# FIXME: header and all that
import logging
import md5
import os
from twisted.web.client import getPage
from encuentro import platform
logger = logging.getLogger('encuentro.main')
class ImageGetter(object):
"""Image downloader and cache object."""
def __init__(self, callback):
self.callback = callback
self.cache_dir = os.path.join(platform.cache_dir, 'encuentro.images')
if not os.path.exists(self.cache_dir):
os.makedirs(self.cache_dir)
def get_image(self, episode_id, url):
"""Get an image and show it using the callback."""
logger.info("Loading image for episode %s: %r", episode_id, url)
file_name = md5.md5(url).hexdigest() + '.jpg'
file_fullname = os.path.join(self.cache_dir, file_name)
if os.path.exists(file_fullname):
logger.debug("Image already available: %r", file_fullname)
self.callback(episode_id, file_fullname)
return
def _d_callback(data, episode_id, file_fullname):
"""Cache the image and use the callback."""
logger.debug("Image downloaded for episode_id %s, saving to %r",
episode_id, file_fullname)
temp_file_name = file_fullname + '.tmp'
with open(temp_file_name, 'wb') as fh:
fh.write(data)
os.rename(temp_file_name, file_fullname)
self.callback(episode_id, file_fullname)
logger.debug("Need to download the image")
d = getPage(url)
d.addCallback(_d_callback, episode_id, file_fullname)
# FIXME: add an errback to log on error
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