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📁 ..	-	2026-03-21 15:53
📄 __init__.py """CacheControl import Interface. Make it easy to import from cachecontrol without long namespaces. """ __author__ = "Eric Larson" __email__ = "eric@ionrock.org" __version__ = "0.12.6" from .wrapper import CacheControl from .adapter import CacheControlAdapter from .controller import CacheController	302 B	2026-01-07 23:39
📁 __pycache__	-	2026-03-21 15:53
📄 _cmd.py import logging from pip._vendor import requests from pip._vendor.cachecontrol.adapter import CacheControlAdapter from pip._vendor.cachecontrol.cache import DictCache from pip._vendor.cachecontrol.controller import logger from argparse import ArgumentParser def setup_logging(): logger.setLevel(logging.DEBUG) handler = logging.StreamHandler() logger.addHandler(handler) def get_session(): adapter = CacheControlAdapter( DictCache(), cache_etags=True, serializer=None, heuristic=None ) sess = requests.Session() sess.mount("http://", adapter) sess.mount("https://", adapter) sess.cache_controller = adapter.controller return sess def get_args(): parser = ArgumentParser() parser.add_argument("url", help="The URL to try and cache") return parser.parse_args() def main(args=None): args = get_args() sess = get_session() # Make a request to get a response resp = sess.get(args.url) # Turn on logging setup_logging() # try setting the cache sess.cache_controller.cache_response(resp.request, resp.raw) # Now try to get it if sess.cache_controller.cached_request(resp.request): print("Cached!") else: print("Not cached :(") if __name__ == "__main__": main()	1.26 KB	2026-01-07 23:39
📄 adapter.py import types import functools import zlib from pip._vendor.requests.adapters import HTTPAdapter from .controller import CacheController from .cache import DictCache from .filewrapper import CallbackFileWrapper class CacheControlAdapter(HTTPAdapter): invalidating_methods = {"PUT", "DELETE"} def __init__( self, cache=None, cache_etags=True, controller_class=None, serializer=None, heuristic=None, cacheable_methods=None, args, kw ): super(CacheControlAdapter, self).__init__(args, kw) self.cache = DictCache() if cache is None else cache self.heuristic = heuristic self.cacheable_methods = cacheable_methods or ("GET",) controller_factory = controller_class or CacheController self.controller = controller_factory( self.cache, cache_etags=cache_etags, serializer=serializer ) def send(self, request, cacheable_methods=None, kw): """ Send a request. Use the request information to see if it exists in the cache and cache the response if we need to and can. """ cacheable = cacheable_methods or self.cacheable_methods if request.method in cacheable: try: cached_response = self.controller.cached_request(request) except zlib.error: cached_response = None if cached_response: return self.build_response(request, cached_response, from_cache=True) # check for etags and add headers if appropriate request.headers.update(self.controller.conditional_headers(request)) resp = super(CacheControlAdapter, self).send(request, **kw) return resp def build_response( self, request, response, from_cache=False, cacheable_methods=None ): """ Build a response by making a request or using the cache. This will end up calling send and returning a potentially cached response """ cacheable = cacheable_methods or self.cacheable_methods if not from_cache and request.method in cacheable: # Check for any heuristics that might update headers # before trying to cache. if self.heuristic: response = self.heuristic.apply(response) # apply any expiration heuristics if response.status == 304: # We must have sent an ETag request. This could mean # that we've been expired already or that we simply # have an etag. In either case, we want to try and # update the cache if that is the case. cached_response = self.controller.update_cached_response( request, response ) if cached_response is not response: from_cache = True # We are done with the server response, read a # possible response body (compliant servers will # not return one, but we cannot be 100% sure) and # release the connection back to the pool. response.read(decode_content=False) response.release_conn() response = cached_response # We always cache the 301 responses elif response.status == 301: self.controller.cache_response(request, response) else: # Wrap the response file with a wrapper that will cache the # response when the stream has been consumed. response._fp = CallbackFileWrapper( response._fp, functools.partial( self.controller.cache_response, request, response ), ) if response.chunked: super_update_chunk_length = response._update_chunk_length def _update_chunk_length(self): super_update_chunk_length() if self.chunk_left == 0: self._fp._close() response._update_chunk_length = types.MethodType( _update_chunk_length, response ) resp = super(CacheControlAdapter, self).build_response(request, response) # See if we should invalidate the cache. if request.method in self.invalidating_methods and resp.ok: cache_url = self.controller.cache_url(request.url) self.cache.delete(cache_url) # Give the request a from_cache attr to let people use it resp.from_cache = from_cache return resp def close(self): self.cache.close() super(CacheControlAdapter, self).close()	4.77 KB	2026-01-07 23:39
📄 cache.py """ The cache object API for implementing caches. The default is a thread safe in-memory dictionary. """ from threading import Lock class BaseCache(object): def get(self, key): raise NotImplementedError() def set(self, key, value): raise NotImplementedError() def delete(self, key): raise NotImplementedError() def close(self): pass class DictCache(BaseCache): def __init__(self, init_dict=None): self.lock = Lock() self.data = init_dict or {} def get(self, key): return self.data.get(key, None) def set(self, key, value): with self.lock: self.data.update({key: value}) def delete(self, key): with self.lock: if key in self.data: self.data.pop(key)	805 B	2026-01-07 23:39
📁 caches	-	2026-03-21 15:53
📄 compat.py try: from urllib.parse import urljoin except ImportError: from urlparse import urljoin try: import cPickle as pickle except ImportError: import pickle # Handle the case where the requests module has been patched to not have # urllib3 bundled as part of its source. try: from pip._vendor.requests.packages.urllib3.response import HTTPResponse except ImportError: from pip._vendor.urllib3.response import HTTPResponse try: from pip._vendor.requests.packages.urllib3.util import is_fp_closed except ImportError: from pip._vendor.urllib3.util import is_fp_closed # Replicate some six behaviour try: text_type = unicode except NameError: text_type = str	695 B	2026-01-07 23:39
📄 controller.py """ The httplib2 algorithms ported for use with requests. """ import logging import re import calendar import time from email.utils import parsedate_tz from pip._vendor.requests.structures import CaseInsensitiveDict from .cache import DictCache from .serialize import Serializer logger = logging.getLogger(__name__) URI = re.compile(r"^(([^:/?#]+):)?(//([^/?#]))?([^?#])(\?([^#]))?(#(.))?") def parse_uri(uri): """Parses a URI using the regex given in Appendix B of RFC 3986. (scheme, authority, path, query, fragment) = parse_uri(uri) """ groups = URI.match(uri).groups() return (groups[1], groups[3], groups[4], groups[6], groups[8]) class CacheController(object): """An interface to see if request should cached or not. """ def __init__( self, cache=None, cache_etags=True, serializer=None, status_codes=None ): self.cache = DictCache() if cache is None else cache self.cache_etags = cache_etags self.serializer = serializer or Serializer() self.cacheable_status_codes = status_codes or (200, 203, 300, 301) @classmethod def _urlnorm(cls, uri): """Normalize the URL to create a safe key for the cache""" (scheme, authority, path, query, fragment) = parse_uri(uri) if not scheme or not authority: raise Exception("Only absolute URIs are allowed. uri = %s" % uri) scheme = scheme.lower() authority = authority.lower() if not path: path = "/" # Could do syntax based normalization of the URI before # computing the digest. See Section 6.2.2 of Std 66. request_uri = query and "?".join([path, query]) or path defrag_uri = scheme + "://" + authority + request_uri return defrag_uri @classmethod def cache_url(cls, uri): return cls._urlnorm(uri) def parse_cache_control(self, headers): known_directives = { # https://tools.ietf.org/html/rfc7234#section-5.2 "max-age": (int, True), "max-stale": (int, False), "min-fresh": (int, True), "no-cache": (None, False), "no-store": (None, False), "no-transform": (None, False), "only-if-cached": (None, False), "must-revalidate": (None, False), "public": (None, False), "private": (None, False), "proxy-revalidate": (None, False), "s-maxage": (int, True), } cc_headers = headers.get("cache-control", headers.get("Cache-Control", "")) retval = {} for cc_directive in cc_headers.split(","): if not cc_directive.strip(): continue parts = cc_directive.split("=", 1) directive = parts[0].strip() try: typ, required = known_directives[directive] except KeyError: logger.debug("Ignoring unknown cache-control directive: %s", directive) continue if not typ or not required: retval[directive] = None if typ: try: retval[directive] = typ(parts[1].strip()) except IndexError: if required: logger.debug( "Missing value for cache-control " "directive: %s", directive, ) except ValueError: logger.debug( "Invalid value for cache-control directive " "%s, must be %s", directive, typ.__name__, ) return retval def cached_request(self, request): """ Return a cached response if it exists in the cache, otherwise return False. """ cache_url = self.cache_url(request.url) logger.debug('Looking up "%s" in the cache', cache_url) cc = self.parse_cache_control(request.headers) # Bail out if the request insists on fresh data if "no-cache" in cc: logger.debug('Request header has "no-cache", cache bypassed') return False if "max-age" in cc and cc["max-age"] == 0: logger.debug('Request header has "max_age" as 0, cache bypassed') return False # Request allows serving from the cache, let's see if we find something cache_data = self.cache.get(cache_url) if cache_data is None: logger.debug("No cache entry available") return False # Check whether it can be deserialized resp = self.serializer.loads(request, cache_data) if not resp: logger.warning("Cache entry deserialization failed, entry ignored") return False # If we have a cached 301, return it immediately. We don't # need to test our response for other headers b/c it is # intrinsically "cacheable" as it is Permanent. # See: # https://tools.ietf.org/html/rfc7231#section-6.4.2 # # Client can try to refresh the value by repeating the request # with cache busting headers as usual (ie no-cache). if resp.status == 301: msg = ( 'Returning cached "301 Moved Permanently" response ' "(ignoring date and etag information)" ) logger.debug(msg) return resp headers = CaseInsensitiveDict(resp.headers) if not headers or "date" not in headers: if "etag" not in headers: # Without date or etag, the cached response can never be used # and should be deleted. logger.debug("Purging cached response: no date or etag") self.cache.delete(cache_url) logger.debug("Ignoring cached response: no date") return False now = time.time() date = calendar.timegm(parsedate_tz(headers["date"])) current_age = max(0, now - date) logger.debug("Current age based on date: %i", current_age) # TODO: There is an assumption that the result will be a # urllib3 response object. This may not be best since we # could probably avoid instantiating or constructing the # response until we know we need it. resp_cc = self.parse_cache_control(headers) # determine freshness freshness_lifetime = 0 # Check the max-age pragma in the cache control header if "max-age" in resp_cc: freshness_lifetime = resp_cc["max-age"] logger.debug("Freshness lifetime from max-age: %i", freshness_lifetime) # If there isn't a max-age, check for an expires header elif "expires" in headers: expires = parsedate_tz(headers["expires"]) if expires is not None: expire_time = calendar.timegm(expires) - date freshness_lifetime = max(0, expire_time) logger.debug("Freshness lifetime from expires: %i", freshness_lifetime) # Determine if we are setting freshness limit in the # request. Note, this overrides what was in the response. if "max-age" in cc: freshness_lifetime = cc["max-age"] logger.debug( "Freshness lifetime from request max-age: %i", freshness_lifetime ) if "min-fresh" in cc: min_fresh = cc["min-fresh"] # adjust our current age by our min fresh current_age += min_fresh logger.debug("Adjusted current age from min-fresh: %i", current_age) # Return entry if it is fresh enough if freshness_lifetime > current_age: logger.debug('The response is "fresh", returning cached response') logger.debug("%i > %i", freshness_lifetime, current_age) return resp # we're not fresh. If we don't have an Etag, clear it out if "etag" not in headers: logger.debug('The cached response is "stale" with no etag, purging') self.cache.delete(cache_url) # return the original handler return False def conditional_headers(self, request): cache_url = self.cache_url(request.url) resp = self.serializer.loads(request, self.cache.get(cache_url)) new_headers = {} if resp: headers = CaseInsensitiveDict(resp.headers) if "etag" in headers: new_headers["If-None-Match"] = headers["ETag"] if "last-modified" in headers: new_headers["If-Modified-Since"] = headers["Last-Modified"] return new_headers def cache_response(self, request, response, body=None, status_codes=None): """ Algorithm for caching requests. This assumes a requests Response object. """ # From httplib2: Don't cache 206's since we aren't going to # handle byte range requests cacheable_status_codes = status_codes or self.cacheable_status_codes if response.status not in cacheable_status_codes: logger.debug( "Status code %s not in %s", response.status, cacheable_status_codes ) return response_headers = CaseInsensitiveDict(response.headers) # If we've been given a body, our response has a Content-Length, that # Content-Length is valid then we can check to see if the body we've # been given matches the expected size, and if it doesn't we'll just # skip trying to cache it. if ( body is not None and "content-length" in response_headers and response_headers["content-length"].isdigit() and int(response_headers["content-length"]) != len(body) ): return cc_req = self.parse_cache_control(request.headers) cc = self.parse_cache_control(response_headers) cache_url = self.cache_url(request.url) logger.debug('Updating cache with response from "%s"', cache_url) # Delete it from the cache if we happen to have it stored there no_store = False if "no-store" in cc: no_store = True logger.debug('Response header has "no-store"') if "no-store" in cc_req: no_store = True logger.debug('Request header has "no-store"') if no_store and self.cache.get(cache_url): logger.debug('Purging existing cache entry to honor "no-store"') self.cache.delete(cache_url) if no_store: return # https://tools.ietf.org/html/rfc7234#section-4.1: # A Vary header field-value of "" always fails to match. # Storing such a response leads to a deserialization warning # during cache lookup and is not allowed to ever be served, # so storing it can be avoided. if "" in response_headers.get("vary", ""): logger.debug('Response header has "Vary: *"') return # If we've been given an etag, then keep the response if self.cache_etags and "etag" in response_headers: logger.debug("Caching due to etag") self.cache.set( cache_url, self.serializer.dumps(request, response, body=body) ) # Add to the cache any 301s. We do this before looking that # the Date headers. elif response.status == 301: logger.debug("Caching permanant redirect") self.cache.set(cache_url, self.serializer.dumps(request, response)) # Add to the cache if the response headers demand it. If there # is no date header then we can't do anything about expiring # the cache. elif "date" in response_headers: # cache when there is a max-age > 0 if "max-age" in cc and cc["max-age"] > 0: logger.debug("Caching b/c date exists and max-age > 0") self.cache.set( cache_url, self.serializer.dumps(request, response, body=body) ) # If the request can expire, it means we should cache it # in the meantime. elif "expires" in response_headers: if response_headers["expires"]: logger.debug("Caching b/c of expires header") self.cache.set( cache_url, self.serializer.dumps(request, response, body=body) ) def update_cached_response(self, request, response): """On a 304 we will get a new set of headers that we want to update our cached value with, assuming we have one. This should only ever be called when we've sent an ETag and gotten a 304 as the response. """ cache_url = self.cache_url(request.url) cached_response = self.serializer.loads(request, self.cache.get(cache_url)) if not cached_response: # we didn't have a cached response return response # Lets update our headers with the headers from the new request: # http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-26#section-4.1 # # The server isn't supposed to send headers that would make # the cached body invalid. But... just in case, we'll be sure # to strip out ones we know that might be problmatic due to # typical assumptions. excluded_headers = ["content-length"] cached_response.headers.update( dict( (k, v) for k, v in response.headers.items() if k.lower() not in excluded_headers ) ) # we want a 200 b/c we have content via the cache cached_response.status = 200 # update our cache self.cache.set(cache_url, self.serializer.dumps(request, cached_response)) return cached_response	13.82 KB	2026-01-07 23:39
📄 filewrapper.py from io import BytesIO class CallbackFileWrapper(object): """ Small wrapper around a fp object which will tee everything read into a buffer, and when that file is closed it will execute a callback with the contents of that buffer. All attributes are proxied to the underlying file object. This class uses members with a double underscore (__) leading prefix so as not to accidentally shadow an attribute. """ def __init__(self, fp, callback): self.__buf = BytesIO() self.__fp = fp self.__callback = callback def __getattr__(self, name): # The vaguaries of garbage collection means that self.__fp is # not always set. By using __getattribute__ and the private # name[0] allows looking up the attribute value and raising an # AttributeError when it doesn't exist. This stop thigns from # infinitely recursing calls to getattr in the case where # self.__fp hasn't been set. # # [0] https://docs.python.org/2/reference/expressions.html#atom-identifiers fp = self.__getattribute__("_CallbackFileWrapper__fp") return getattr(fp, name) def __is_fp_closed(self): try: return self.__fp.fp is None except AttributeError: pass try: return self.__fp.closed except AttributeError: pass # We just don't cache it then. # TODO: Add some logging here... return False def _close(self): if self.__callback: self.__callback(self.__buf.getvalue()) # We assign this to None here, because otherwise we can get into # really tricky problems where the CPython interpreter dead locks # because the callback is holding a reference to something which # has a __del__ method. Setting this to None breaks the cycle # and allows the garbage collector to do it's thing normally. self.__callback = None def read(self, amt=None): data = self.__fp.read(amt) self.__buf.write(data) if self.__is_fp_closed(): self._close() return data def _safe_read(self, amt): data = self.__fp._safe_read(amt) if amt == 2 and data == b"\r\n": # urllib executes this read to toss the CRLF at the end # of the chunk. return data self.__buf.write(data) if self.__is_fp_closed(): self._close() return data	2.47 KB	2026-01-07 23:39
📄 heuristics.py import calendar import time from email.utils import formatdate, parsedate, parsedate_tz from datetime import datetime, timedelta TIME_FMT = "%a, %d %b %Y %H:%M:%S GMT" def expire_after(delta, date=None): date = date or datetime.utcnow() return date + delta def datetime_to_header(dt): return formatdate(calendar.timegm(dt.timetuple())) class BaseHeuristic(object): def warning(self, response): """ Return a valid 1xx warning header value describing the cache adjustments. The response is provided too allow warnings like 113 http://tools.ietf.org/html/rfc7234#section-5.5.4 where we need to explicitly say response is over 24 hours old. """ return '110 - "Response is Stale"' def update_headers(self, response): """Update the response headers with any new headers. NOTE: This SHOULD always include some Warning header to signify that the response was cached by the client, not by way of the provided headers. """ return {} def apply(self, response): updated_headers = self.update_headers(response) if updated_headers: response.headers.update(updated_headers) warning_header_value = self.warning(response) if warning_header_value is not None: response.headers.update({"Warning": warning_header_value}) return response class OneDayCache(BaseHeuristic): """ Cache the response by providing an expires 1 day in the future. """ def update_headers(self, response): headers = {} if "expires" not in response.headers: date = parsedate(response.headers["date"]) expires = expire_after(timedelta(days=1), date=datetime(date[:6])) headers["expires"] = datetime_to_header(expires) headers["cache-control"] = "public" return headers class ExpiresAfter(BaseHeuristic): """ Cache all* requests for a defined time period. """ def __init__(self, kw): self.delta = timedelta(kw) def update_headers(self, response): expires = expire_after(self.delta) return {"expires": datetime_to_header(expires), "cache-control": "public"} def warning(self, response): tmpl = "110 - Automatically cached for %s. Response might be stale" return tmpl % self.delta class LastModified(BaseHeuristic): """ If there is no Expires header already, fall back on Last-Modified using the heuristic from http://tools.ietf.org/html/rfc7234#section-4.2.2 to calculate a reasonable value. Firefox also does something like this per https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching_FAQ http://lxr.mozilla.org/mozilla-release/source/netwerk/protocol/http/nsHttpResponseHead.cpp#397 Unlike mozilla we limit this to 24-hr. """ cacheable_by_default_statuses = { 200, 203, 204, 206, 300, 301, 404, 405, 410, 414, 501 } def update_headers(self, resp): headers = resp.headers if "expires" in headers: return {} if "cache-control" in headers and headers["cache-control"] != "public": return {} if resp.status not in self.cacheable_by_default_statuses: return {} if "date" not in headers or "last-modified" not in headers: return {} date = calendar.timegm(parsedate_tz(headers["date"])) last_modified = parsedate(headers["last-modified"]) if date is None or last_modified is None: return {} now = time.time() current_age = max(0, now - date) delta = date - calendar.timegm(last_modified) freshness_lifetime = max(0, min(delta / 10, 24 * 3600)) if freshness_lifetime <= current_age: return {} expires = date + freshness_lifetime return {"expires": time.strftime(TIME_FMT, time.gmtime(expires))} def warning(self, resp): return None	3.97 KB	2026-01-07 23:39
📄 serialize.py import base64 import io import json import zlib from pip._vendor import msgpack from pip._vendor.requests.structures import CaseInsensitiveDict from .compat import HTTPResponse, pickle, text_type def _b64_decode_bytes(b): return base64.b64decode(b.encode("ascii")) def _b64_decode_str(s): return _b64_decode_bytes(s).decode("utf8") class Serializer(object): def dumps(self, request, response, body=None): response_headers = CaseInsensitiveDict(response.headers) if body is None: body = response.read(decode_content=False) # NOTE: 99% sure this is dead code. I'm only leaving it # here b/c I don't have a test yet to prove # it. Basically, before using # `cachecontrol.filewrapper.CallbackFileWrapper`, # this made an effort to reset the file handle. The # `CallbackFileWrapper` short circuits this code by # setting the body as the content is consumed, the # result being a `body` argument is always passed # into cache_response, and in turn, # `Serializer.dump`. response._fp = io.BytesIO(body) # NOTE: This is all a bit weird, but it's really important that on # Python 2.x these objects are unicode and not str, even when # they contain only ascii. The problem here is that msgpack # understands the difference between unicode and bytes and we # have it set to differentiate between them, however Python 2 # doesn't know the difference. Forcing these to unicode will be # enough to have msgpack know the difference. data = { u"response": { u"body": body, u"headers": dict( (text_type(k), text_type(v)) for k, v in response.headers.items() ), u"status": response.status, u"version": response.version, u"reason": text_type(response.reason), u"strict": response.strict, u"decode_content": response.decode_content, } } # Construct our vary headers data[u"vary"] = {} if u"vary" in response_headers: varied_headers = response_headers[u"vary"].split(",") for header in varied_headers: header = text_type(header).strip() header_value = request.headers.get(header, None) if header_value is not None: header_value = text_type(header_value) data[u"vary"][header] = header_value return b",".join([b"cc=4", msgpack.dumps(data, use_bin_type=True)]) def loads(self, request, data): # Short circuit if we've been given an empty set of data if not data: return # Determine what version of the serializer the data was serialized # with try: ver, data = data.split(b",", 1) except ValueError: ver = b"cc=0" # Make sure that our "ver" is actually a version and isn't a false # positive from a , being in the data stream. if ver[:3] != b"cc=": data = ver + data ver = b"cc=0" # Get the version number out of the cc=N ver = ver.split(b"=", 1)[-1].decode("ascii") # Dispatch to the actual load method for the given version try: return getattr(self, "_loads_v{}".format(ver))(request, data) except AttributeError: # This is a version we don't have a loads function for, so we'll # just treat it as a miss and return None return def prepare_response(self, request, cached): """Verify our vary headers match and construct a real urllib3 HTTPResponse object. """ # Special case the '' Vary value as it means we cannot actually # determine if the cached response is suitable for this request. # This case is also handled in the controller code when creating # a cache entry, but is left here for backwards compatibility. if "" in cached.get("vary", {}): return # Ensure that the Vary headers for the cached response match our # request for header, value in cached.get("vary", {}).items(): if request.headers.get(header, None) != value: return body_raw = cached["response"].pop("body") headers = CaseInsensitiveDict(data=cached["response"]["headers"]) if headers.get("transfer-encoding", "") == "chunked": headers.pop("transfer-encoding") cached["response"]["headers"] = headers try: body = io.BytesIO(body_raw) except TypeError: # This can happen if cachecontrol serialized to v1 format (pickle) # using Python 2. A Python 2 str(byte string) will be unpickled as # a Python 3 str (unicode string), which will cause the above to # fail with: # # TypeError: 'str' does not support the buffer interface body = io.BytesIO(body_raw.encode("utf8")) return HTTPResponse(body=body, preload_content=False, **cached["response"]) def _loads_v0(self, request, data): # The original legacy cache data. This doesn't contain enough # information to construct everything we need, so we'll treat this as # a miss. return def _loads_v1(self, request, data): try: cached = pickle.loads(data) except ValueError: return return self.prepare_response(request, cached) def _loads_v2(self, request, data): try: cached = json.loads(zlib.decompress(data).decode("utf8")) except (ValueError, zlib.error): return # We need to decode the items that we've base64 encoded cached["response"]["body"] = _b64_decode_bytes(cached["response"]["body"]) cached["response"]["headers"] = dict( (_b64_decode_str(k), _b64_decode_str(v)) for k, v in cached["response"]["headers"].items() ) cached["response"]["reason"] = _b64_decode_str(cached["response"]["reason"]) cached["vary"] = dict( (_b64_decode_str(k), _b64_decode_str(v) if v is not None else v) for k, v in cached["vary"].items() ) return self.prepare_response(request, cached) def _loads_v3(self, request, data): # Due to Python 2 encoding issues, it's impossible to know for sure # exactly how to load v3 entries, thus we'll treat these as a miss so # that they get rewritten out as v4 entries. return def _loads_v4(self, request, data): try: cached = msgpack.loads(data, raw=False) except ValueError: return return self.prepare_response(request, cached)	6.92 KB	2026-01-07 23:39
📄 wrapper.py from .adapter import CacheControlAdapter from .cache import DictCache def CacheControl( sess, cache=None, cache_etags=True, serializer=None, heuristic=None, controller_class=None, adapter_class=None, cacheable_methods=None, ): cache = DictCache() if cache is None else cache adapter_class = adapter_class or CacheControlAdapter adapter = adapter_class( cache, cache_etags=cache_etags, serializer=serializer, heuristic=heuristic, controller_class=controller_class, cacheable_methods=cacheable_methods, ) sess.mount("http://", adapter) sess.mount("https://", adapter) return sess	690 B	2026-01-07 23:39

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