+
+
+def read_batch_urls(batch_fd):
+ def fixup(url):
+ if not isinstance(url, compat_str):
+ url = url.decode('utf-8', 'replace')
+ BOM_UTF8 = u'\xef\xbb\xbf'
+ if url.startswith(BOM_UTF8):
+ url = url[len(BOM_UTF8):]
+ url = url.strip()
+ if url.startswith(('#', ';', ']')):
+ return False
+ return url
+
+ with contextlib.closing(batch_fd) as fd:
+ return [url for url in map(fixup, fd) if url]
+
+
+def urlencode_postdata(*args, **kargs):
+ return compat_urllib_parse.urlencode(*args, **kargs).encode('ascii')
+
+
+try:
+ etree_iter = xml.etree.ElementTree.Element.iter
+except AttributeError: # Python <=2.6
+ etree_iter = lambda n: n.findall('.//*')
+
+
+def parse_xml(s):
+ class TreeBuilder(xml.etree.ElementTree.TreeBuilder):
+ def doctype(self, name, pubid, system):
+ pass # Ignore doctypes
+
+ parser = xml.etree.ElementTree.XMLParser(target=TreeBuilder())
+ kwargs = {'parser': parser} if sys.version_info >= (2, 7) else {}
+ tree = xml.etree.ElementTree.XML(s.encode('utf-8'), **kwargs)
+ # Fix up XML parser in Python 2.x
+ if sys.version_info < (3, 0):
+ for n in etree_iter(tree):
+ if n.text is not None:
+ if not isinstance(n.text, compat_str):
+ n.text = n.text.decode('utf-8')
+ return tree
+
+
+if sys.version_info < (3, 0) and sys.platform == 'win32':
+ def compat_getpass(prompt, *args, **kwargs):
+ if isinstance(prompt, compat_str):
+ prompt = prompt.encode(preferredencoding())
+ return getpass.getpass(prompt, *args, **kwargs)
+else:
+ compat_getpass = getpass.getpass
+
+
+US_RATINGS = {
+ 'G': 0,
+ 'PG': 10,
+ 'PG-13': 13,
+ 'R': 16,
+ 'NC': 18,
+}
+
+
+def parse_age_limit(s):
+ if s is None:
+ return None
+ m = re.match(r'^(?P<age>\d{1,2})\+?$', s)
+ return int(m.group('age')) if m else US_RATINGS.get(s, None)
+
+
+def strip_jsonp(code):
+ return re.sub(r'(?s)^[a-zA-Z0-9_]+\s*\(\s*(.*)\);?\s*?\s*$', r'\1', code)
+
+
+def js_to_json(code):
+ def fix_kv(m):
+ v = m.group(0)
+ if v in ('true', 'false', 'null'):
+ return v
+ if v.startswith('"'):
+ return v
+ if v.startswith("'"):
+ v = v[1:-1]
+ v = re.sub(r"\\\\|\\'|\"", lambda m: {
+ '\\\\': '\\\\',
+ "\\'": "'",
+ '"': '\\"',
+ }[m.group(0)], v)
+ return '"%s"' % v
+
+ res = re.sub(r'''(?x)
+ "(?:[^"\\]*(?:\\\\|\\")?)*"|
+ '(?:[^'\\]*(?:\\\\|\\')?)*'|
+ [a-zA-Z_][a-zA-Z_0-9]*
+ ''', fix_kv, code)
+ res = re.sub(r',(\s*\])', lambda m: m.group(1), res)
+ return res
+
+
+def qualities(quality_ids):
+ """ Get a numeric quality value out of a list of possible values """
+ def q(qid):
+ try:
+ return quality_ids.index(qid)
+ except ValueError:
+ return -1
+ return q
+
+
+DEFAULT_OUTTMPL = '%(title)s-%(id)s.%(ext)s'
+
+try:
+ subprocess_check_output = subprocess.check_output
+except AttributeError:
+ def subprocess_check_output(*args, **kwargs):
+ assert 'input' not in kwargs
+ p = subprocess.Popen(*args, stdout=subprocess.PIPE, **kwargs)
+ output, _ = p.communicate()
+ ret = p.poll()
+ if ret:
+ raise subprocess.CalledProcessError(ret, p.args, output=output)
+ return output
+
+
+def limit_length(s, length):
+ """ Add ellipses to overly long strings """
+ if s is None:
+ return None
+ ELLIPSES = '...'
+ if len(s) > length:
+ return s[:length - len(ELLIPSES)] + ELLIPSES
+ return s
+
+
+def version_tuple(v):
+ return [int(e) for e in v.split('.')]
+
+
+def is_outdated_version(version, limit, assume_new=True):
+ if not version:
+ return not assume_new
+ try:
+ return version_tuple(version) < version_tuple(limit)
+ except ValueError:
+ return not assume_new