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#!/usr/bin/python
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import re
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import os
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import os.path
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import sys
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import errno
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import datetime
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import urllib2
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import subprocess
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import argparse
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import configobj
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import tempfile
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import socket
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# parse command line options
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parser = argparse.ArgumentParser(
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description='Hosts fetcher for py-i2phosts.',
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epilog='Report bugs to http://zzz.i2p/topics/733')
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parser.add_argument('-d', '--debug', action='store_true',
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help='write debug messages to stdout instead of log file'),
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parser.add_argument('-c', '--config', default='/etc/py-i2phosts/fetcher.conf', dest='config_file',
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help='config file to use')
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args = parser.parse_args()
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# read config
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spec = '''
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proxyurl = string(default='http://localhost:4444/')
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log_file = string(default='/var/log/py-i2phosts/fetcher.log')
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log_level = option('debug', 'info', 'warning', 'error', 'critical', default='info')
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'''
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spec = spec.split('\n')
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config = configobj.ConfigObj(args.config_file, configspec=spec, file_error=True)
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if 'include' in config:
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config_included = configobj.ConfigObj(config['include'])
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config.merge(config_included)
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# django setup
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DJANGO_SETTINGS_MODULE = 'pyi2phosts.settings'
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if 'DJANGO_PROJECT_PATH' in config:
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DJANGO_PROJECT_PATH = config['DJANGO_PROJECT_PATH']
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else:
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DJANGO_PROJECT_PATH = os.path.dirname(sys.argv[0]) + '/web'
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sys.path.insert(1, DJANGO_PROJECT_PATH)
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os.environ['DJANGO_SETTINGS_MODULE'] = DJANGO_SETTINGS_MODULE
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from pyi2phosts.lib.utils import get_logger
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from pyi2phosts.lib.utils import validate_config
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from pyi2phosts.extsources.models import ExternalSource
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# validate config
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validate_config(config)
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# configure logger
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if args.debug == True:
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log_level = 'debug'
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log_file = None
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else:
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log_level = config['log_level']
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log_file = config['log_file']
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log = get_logger(filename=log_file, log_level=log_level)
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# we want open urls through proxy
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proxy_handler = urllib2.ProxyHandler({'http': config['proxyurl']})
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opener = urllib2.build_opener(proxy_handler)
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all_sources = ExternalSource.objects.filter(active=True)
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for source in all_sources:
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log.debug('%s: starting work', source.name)
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if source.last_modified:
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last_modified = source.last_modified.strftime('%a, %d %b %Y %H:%M:%S GMT')
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# prevent redownloading of hosts-file by passing If-Modified-Since http header
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opener.addheaders = [('If-Modified-Since', last_modified)]
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log.debug('%s: appending If-Modified-Since: %s', source.name, last_modified)
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if source.etag:
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opener.addheaders = [('If-None-Match', source.etag)]
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log.debug('%s: appending If-None-Match: %s', source.name, source.etag)
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try:
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log.debug('%s: sending GET...', source.name)
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resp = opener.open(source.url, timeout=60)
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except socket.timeout:
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log.warning('%s: socket timeout', source.name)
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continue
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except urllib2.HTTPError, e:
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if e.code == 304:
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log.info('%s: not modified', source.name)
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source.last_success = datetime.datetime.utcnow()
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source.save()
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else:
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log.warning('%s: can\'t finish the request, error code: %s, reason: %s', source.name, e.code, e.reason)
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continue
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except urllib2.URLError, e:
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log.warning('%s: failed to reach server, reason: %s', source.name, e.reason)
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continue
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# read data from remote and write it to local file
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try:
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log.debug('%s: reading response data', source.name)
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content = resp.read()
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except:
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log.warning('%s: failed to read data', source.name)
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continue
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# save fetched content into temporary file
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fd, tmpfile = tempfile.mkstemp(text=True)
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f = os.fdopen(fd, 'w')
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f.write(content)
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f.close()
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# get last-modified info from header
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lm = resp.headers.get('Last-Modified')
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if lm:
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log.debug('%s: Last-Modified: %s', source.name, lm)
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source.last_modified = datetime.datetime.strptime(lm, '%a, %d %b %Y %H:%M:%S GMT')
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# get ETag
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etag = resp.headers.get('ETag')
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if etag:
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log.debug('%s: ETag: %s', source.name, etag)
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source.etag = etag
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# form command-line for invoke injector
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log.info('%s: adding hosts...', source.name)
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sp_args = ['py-i2phosts-injector', '-s', '-f', tmpfile, '-d',
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'Auto-added from ' + source.name]
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try:
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p = subprocess.Popen(sp_args, shell=False, stdin=None,
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stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
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except OSError, e:
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log.error('failed to exec py-i2phosts-injector: %s', e)
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if e.errno == errno.ENOENT:
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log.error('check your PATH environment variable')
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sys.exit(1)
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out = p.communicate()[0]
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os.remove(tmpfile)
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log.info('%s: injector output: \n%s', source.name, out)
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# update last_success
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source.last_success = datetime.datetime.utcnow()
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log.debug('%s: updating last_success timestamp: %s', source.name, source.last_success)
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source.save()
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