from __future__ import unicode_literals
import base64
+import binascii
import calendar
import codecs
import contextlib
class OnDemandPagedList(PagedList):
- def __init__(self, pagefunc, pagesize):
+ def __init__(self, pagefunc, pagesize, use_cache=False):
self._pagefunc = pagefunc
self._pagesize = pagesize
+ self._use_cache = use_cache
+ if use_cache:
+ self._cache = {}
def getslice(self, start=0, end=None):
res = []
if start >= nextfirstid:
continue
- page_results = list(self._pagefunc(pagenum))
+ page_results = None
+ if self._use_cache:
+ page_results = self._cache.get(pagenum)
+ if page_results is None:
+ page_results = list(self._pagefunc(pagenum))
+ if self._use_cache:
+ self._cache[pagenum] = page_results
startv = (
start % self._pagesize
def mimetype2ext(mt):
+ ext = {
+ 'audio/mp4': 'm4a',
+ }.get(mt)
+ if ext is not None:
+ return ext
+
_, _, res = mt.rpartition('/')
return {
'3gpp': '3gp',
+ 'smptett+xml': 'tt',
+ 'srt': 'srt',
+ 'ttaf+xml': 'dfxp',
'ttml+xml': 'ttml',
+ 'vtt': 'vtt',
'x-flv': 'flv',
'x-mp4-fragmented': 'mp4',
'x-ms-wmv': 'wmv',
return None # No Proxy
return compat_urllib_request.ProxyHandler.proxy_open(
self, req, proxy, type)
+
+
+def ohdave_rsa_encrypt(data, exponent, modulus):
+ '''
+ Implement OHDave's RSA algorithm. See http://www.ohdave.com/rsa/
+
+ Input:
+ data: data to encrypt, bytes-like object
+ exponent, modulus: parameter e and N of RSA algorithm, both integer
+ Output: hex string of encrypted data
+
+ Limitation: supports one block encryption only
+ '''
+
+ payload = int(binascii.hexlify(data[::-1]), 16)
+ encrypted = pow(payload, exponent, modulus)
+ return '%x' % encrypted