iL]c@sddlZddlZddlmZmZmZmZmZddlm Z ej e Z de fdYZede_dS(iNi(tConnectTimeoutErrort MaxRetryErrort ProtocolErrortReadTimeoutErrort ResponseError(tsixtRetryc BseZdZeddddddgZedgZdZd dddedd ed ed Z d Z e edd Z dZ dZdZdZdZdZdddddddZdZRS(s Retry configuration. Each retry attempt will create a new Retry object with updated values, so they can be safely reused. Retries can be defined as a default for a pool:: retries = Retry(connect=5, read=2, redirect=5) http = PoolManager(retries=retries) response = http.request('GET', 'http://example.com/') Or per-request (which overrides the default for the pool):: response = http.request('GET', 'http://example.com/', retries=Retry(10)) Retries can be disabled by passing ``False``:: response = http.request('GET', 'http://example.com/', retries=False) Errors will be wrapped in :class:`~urllib3.exceptions.MaxRetryError` unless retries are disabled, in which case the causing exception will be raised. :param int total: Total number of retries to allow. Takes precedence over other counts. Set to ``None`` to remove this constraint and fall back on other counts. It's a good idea to set this to some sensibly-high value to account for unexpected edge cases and avoid infinite retry loops. Set to ``0`` to fail on the first retry. Set to ``False`` to disable and imply ``raise_on_redirect=False``. :param int connect: How many connection-related errors to retry on. These are errors raised before the request is sent to the remote server, which we assume has not triggered the server to process the request. Set to ``0`` to fail on the first retry of this type. :param int read: How many times to retry on read errors. These errors are raised after the request was sent to the server, so the request may have side-effects. Set to ``0`` to fail on the first retry of this type. :param int redirect: How many redirects to perform. Limit this to avoid infinite redirect loops. A redirect is a HTTP response with a status code 301, 302, 303, 307 or 308. Set to ``0`` to fail on the first retry of this type. Set to ``False`` to disable and imply ``raise_on_redirect=False``. :param iterable method_whitelist: Set of uppercased HTTP method verbs that we should retry on. By default, we only retry on methods which are considered to be indempotent (multiple requests with the same parameters end with the same state). See :attr:`Retry.DEFAULT_METHOD_WHITELIST`. :param iterable status_forcelist: A set of HTTP status codes that we should force a retry on. By default, this is disabled with ``None``. :param float backoff_factor: A backoff factor to apply between attempts. urllib3 will sleep for:: {backoff factor} * (2 ^ ({number of total retries} - 1)) seconds. If the backoff_factor is 0.1, then :func:`.sleep` will sleep for [0.1s, 0.2s, 0.4s, ...] between retries. It will never be longer than :attr:`Retry.MAX_BACKOFF`. By default, backoff is disabled (set to 0). :param bool raise_on_redirect: Whether, if the number of redirects is exhausted, to raise a MaxRetryError, or to return a response with a response code in the 3xx range. :param iterable remove_headers_on_redirect: Sequence of headers to remove from the request when a response indicating a redirect is returned before firing off the redirected request. tHEADtGETtPUTtDELETEtOPTIONStTRACEt Authorizationixi ic Cs||_||_||_|tks3|tkrBd}t}n||_|pWt|_||_||_||_ | |_ | |_ dS(Ni( ttotaltconnecttreadtFalsetredirecttsettstatus_forcelisttmethod_whitelisttbackoff_factortraise_on_redirectt_observed_errorstremove_headers_on_redirect( tselfRRRRRRRRRR((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyt__init__ws         cKstd|jd|jd|jd|jd|jd|jd|jd|jd |j d |j }|j |t ||S( NRRRRRRRRRR( tdictRRRRRRRRRRtupdatettype(Rtkwtparams((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pytnews        cCs||dkr*|dk r|n|j}nt|tr=|St|oLd}||d|}tjd||f|S(s4 Backwards-compatibility for the old retries format.Rs!Converted retries value: %r -> %rN(tNonetDEFAULTt isinstanceRtbooltlogtdebug(tclstretriesRtdefaultt new_retries((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pytfrom_ints cCs;|jdkrdS|jd|jd}t|j|S(sJ Formula for computing the current backoff :rtype: float iii(RRtmint BACKOFF_MAX(Rt backoff_value((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pytget_backoff_timescCs-|j}|dkrdStj|dS(s Sleep between retry attempts using an exponential backoff. By default, the backoff factor is 0 and this method will return immediately. iN(R0ttimetsleep(Rtbackoff((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyR2s  cCs t|tS(s{ Errors when we're fairly sure that the server did not receive the request, so it should be safe to retry. (R$R(Rterr((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyt_is_connection_errorscCst|ttfS(s Errors that occur after the request has been started, so we should assume that the server began processing it. (R$RR(RR4((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyt_is_read_errorscCs8|jr"|j|jkr"tS|jo7||jkS(sR Is this method/status code retryable? (Based on method/codes whitelists) (RtupperRR(Rtmethodt status_code((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pytis_forced_retryscCsM|j|j|j|jf}ttd|}|s=tSt|dkS(s Are we out of retries? iN( RRRRtlisttfilterR"RR-(Rt retry_counts((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyt is_exhausteds cCs,|jtkr3|r3tjt|||n|j}|d k rU|d8}n|j}|j} |j} |j } d} |r|j |r| tkrtjt|||n| d k r| d8} n|d7}n|rI|j |rI| tkr#tjt|||n| d k r<| d8} n|d7}nq|r}|j r}| d k rt| d8} nd} n=|d7}t j} |r|jrt jjd|j} n|jd|d| d| d| d |} | jrt|||pt | ntjd || f| S( s Return a new Retry object with incremented retry counters. :param response: A response object, or None, if the server did not return a response. :type response: :class:`~urllib3.response.HTTPResponse` :param Exception error: An error encountered during the request, or None if the response was received successfully. :return: A new ``Retry`` object. itunknownstoo many redirectsR9RRRRRs$Incremented Retry for (url='%s'): %rN(RRRtreraiseRR"RRRRR5R6tget_redirect_locationRt GENERIC_ERRORtstatustSPECIFIC_ERRORtformatR!R>RR&R'(RR8turltresponseterrort_poolt _stacktraceRRRRRtcauset new_retry((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyt incrementsN                         !cCsdjdt|d|S(Nsf{cls.__name__}(total={self.total}, connect={self.connect}, read={self.read}, redirect={self.redirect})R(R(RER(R((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyt__repr__ s N(t__name__t __module__t__doc__t frozensettDEFAULT_METHOD_WHITELISTt"DEFAULT_REDIRECT_HEADERS_BLACKLISTR.R"tTrueRR!t classmethodR,R0R2R5R6R:R>RMRN(((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyRs(\        Ei(R1tloggingt exceptionsRRRRRtpackagesRt getLoggerROR&tobjectRR#(((s6/usr/lib/python2.7/site-packages/urllib3/util/retry.pyts  (