_c@sdZddlZddlZddlZddlmZddlmZddlmZddlm Z ddlmZdd l m Z dd l m Z dd l m Z dd l mZdd l mZddl mZddl mZddl mZddlmZddlmZddlmZyddlmZWn"ek rbddlmZYnXy$ddlmZddlmZ Wn2ek rddl!mZddl!m"Z YnXdZ#dZ$ej%dej&Z'e(dZ)ej%dZ*e+dZ,ej%ddej&Z-ej%d Z.e(d!d"d#d$d%d&d'd(d)d*g Z/e(d+d,d-d.d/d0d1d2gZ0d3d4d5d6d7d8d9d:d;d<d=d>d?d@dAdBdCdDdEdFdGdHdIdJdKdLdMdNdOdPdQdRdSdTdUdVdWdXdYdZd[d\d]d^d_d`dadbdcdddedfdgdhdidjdkdldmdndodpdqdrdsdtdudvdwdxdydzd{d|d}d~ddddddddddddddddddddddddddddddddddddddddddddddddddddi@Z1ddZ2ddZ3ddddZ4dddZ5ddZ6dddZ7ddZ8ddZ9e:ddZ;dddZ<dddZ=ddddZ>ddddZ?dddZ@ddZAdddZBddZCdddZDdddZEdddZFddZGddZHddZIddZJddZKdddZLdddZMdddZNdddZOddddddZPdddZQddZRddZSddZTdddddZUddddddddddddd ZVddZWddlXmYZYddlXmZZZddlXm[Z[ddlXm\Z\ddlXm]Z]ddlXm^Z^dd lXm_Z_dd lXm`Z`dd lXmaZadd lXmbZbdd lXmcZcdS(a" werkzeug.http ~~~~~~~~~~~~~ Werkzeug comes with a bunch of utilities that help Werkzeug to deal with HTTP data. 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This covers some of the more HTTP centric features of WSGI, some other utilities such as cookie handling are documented in the `werkzeug.utils` module. :copyright: 2007 Pallets :license: BSD-3-Clause N)datetime) timedelta)md5)gmtime)time) integer_types) iteritems)PY2) string_types) text_type)to_bytes) to_unicode)try_coerce_native)_cookie_parse_impl) _cookie_quote)_make_cookie_domain) parsedate_tz)parse_http_list)unquote_to_bytes)unquotelatin1zutf-8a ( # media-range capturing-parenthesis [^\s;,]+ # type/subtype (?:[ \t]*;[ \t]* # ";" (?: # parameter non-capturing-parenthesis [^\s;,q][^\s;,]* # token that doesn't start with "q" | # or q[^\s;,=][^\s;,]* # token that is more than just "q" ) )* # zero or more parameters ) # end of media-range (?:[ \t]*;[ \t]*q= # weight is a "q" parameter (\d*(?:\.\d+)?) # qvalue capturing-parentheses [^,]* # "extension" accept params: who cares? )? # accept params are optional zM!#$%&'*+-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ^_`abcdefghijklmnopqrstuvwxyz|~z&([Ww]/)?(?:"(.*?)"|(.*?))(?:\s*,\s*|$)z()<>@,;:"/[]?={} a ;\s*,?\s* # newlines were replaced with commas (?P "[^"\\]*(?:\\.[^"\\]*)*" # quoted string | [^\s;,=*]+ # token ) (?:\*(?P\d+))? # *1, optional continuation index \s* (?: # optionally followed by =value (?: # equals sign, possibly with encoding \*\s*=\s* # * indicates extended notation (?: # optional encoding (?P[^\s]+?) '(?P[^\s]*?)' )? | =\s* # basic notation ) (?P "[^"\\]*(?:\\.[^"\\]*)*" # quoted string | [^;,]+ # token )? )? \s* flagsz,\s*([^;,\s]+)([;,]\s*.+)?Zallowzcontent-encodingzcontent-languagezcontent-lengthcontent-locationz content-md5z content-rangez content-typeexpiresz last-modified connectionz keep-alivezproxy-authenticatezproxy-authorizationtetrailerztransfer-encodingupgradedContinueezSwitching Protocolsf Processinggz Early HintsOKCreatedAcceptedzNon Authoritative Informationz No Contentz Reset ContentzPartial Contentz Multi StatuszAlready ReportedzIM Usedi,zMultiple Choicesi-zMoved Permanentlyi.Foundi/z See Otheri0z Not Modifiedi1z Use Proxyi2z Switch Proxyi3zTemporary Redirecti4zPermanent Redirectiz Bad Requesti UnauthorizedizPayment Requiredi Forbiddeniz Not FoundizMethod Not AllowedizNot AcceptableizProxy Authentication RequiredizRequest TimeoutiConflictiGoneizLength RequiredizPrecondition FailedizRequest Entity Too LargeizRequest URI Too LongizUnsupported Media TypeizRequested Range Not SatisfiableizExpectation Failediz I'm a teapotizMisdirected RequestizUnprocessable EntityiLockedizFailed Dependencyiz Too EarlyizUpgrade RequiredizPrecondition RequiredizToo Many RequestsizRequest Header Fields Too Largeiz Retry WithizUnavailable For Legal ReasonsizInternal Server ErrorizNot Implementediz Bad GatewayizService UnavailableizGateway TimeoutizHTTP Version Not SupportedizVariant Also NegotiatesizInsufficient Storageiz Loop Detectediz Not ExtendedizNetwork Authentication FailedcCs t|tr|S|jdS)z2coerce wsgi unicode represented bytes to real onesr) isinstancebytesencode)datar<1/tmp/pip-build-5gj8f0j9/Werkzeug/werkzeug/http.py wsgi_to_bytessr>cCs?t|tstdt|tr.|S|jdSdS)Nzdata must be bytesr)r8r9AssertionErrorstrdecode)r;r<r<r= bytes_to_wsgisrBTcCsvt|trt|}t|}|rVtt|B}t|j|rV|Sd|jddjddS)aQuote a header value if necessary. .. versionadded:: 0.5 :param value: the value to quote. :param extra_chars: a list of extra characters to skip quoting. :param allow_token: if this is enabled token values are returned unchanged. z"%s"\z\\"z\")r8r9rBr@ _token_charssetissubsetreplace)valueZ extra_chars allow_tokenZ token_charsr<r<r=quote_header_values   rLFcCsw|rs|d|d ko%dknrs|dd }| sW|dddkrs|jddjddS|S) zUnquotes a header value. (Reversal of :func:`quote_header_value`). This does not use the real unquoting but what browsers are actually using for quoting. .. versionadded:: 0.5 :param value: the header value to unquote. rrrENz\\rDz\"rN)rI)rJ is_filenamer<r<r=unquote_header_values *rPcCsg}|dk r|j|xSt|D]E\}}|dkrT|j|q,|jd|t|fq,Wdj|S)zThe reverse function to :func:`parse_options_header`. :param header: the header to dump :param options: a dict of options to append. Nz%s=%sz; )appendr rLjoin)headeroptionssegmentskeyrJr<r<r=dump_options_header s   !rWcst|trtg}xut|D]K\}}|dkrJ|j|q"|jd|t|dfq"Wnfdd|D}dj|S)aJDump an HTTP header again. This is the reversal of :func:`parse_list_header`, :func:`parse_set_header` and :func:`parse_dict_header`. This also quotes strings that include an equals sign unless you pass it as dict of key, value pairs. >>> dump_header({'foo': 'bar baz'}) 'foo="bar baz"' >>> dump_header(('foo', 'bar baz')) 'foo, "bar baz"' :param iterable: the iterable or dict of values to quote. :param allow_token: if set to `False` tokens as values are disallowed. See :func:`quote_header_value` for more details. Nz%s=%srKcs"g|]}t|dqS)rK)rL).0x)rKr<r= 6s zdump_header..z, )r8dictr rQrLrR)iterablerKitemsrVrJr<)rKr= dump_headers $r^cCs djddt|DS)zDump a Content Security Policy header. These are structured into policies such as "default-src 'self'; script-src 'self'". .. versionadded:: 1.0.0 Support for Content Security Policy headers was added. z; css%|]\}}d||fVqdS)z%s %sNr<)rXrVrJr<r<r= Dsz"dump_csp_header..)rRr )rSr<r<r=dump_csp_header:s r`cCstg}xgt|D]Y}|dd|ddkoDdknr_t|dd}|j|qW|S)aParse lists as described by RFC 2068 Section 2. In particular, parse comma-separated lists where the elements of the list may include quoted-strings. A quoted-string could contain a comma. A non-quoted string could have quotes in the middle. Quotes are removed automatically after parsing. It basically works like :func:`parse_set_header` just that items may appear multiple times and case sensitivity is preserved. The return value is a standard :class:`list`: >>> parse_list_header('token, "quoted value"') ['token', 'quoted value'] To create a header from the :class:`list` again, use the :func:`dump_header` function. :param value: a string with a list header. :return: :class:`list` NrrErNrN)_parse_list_headerrPrQ)rJresultitemr<r<r=parse_list_headerGs 0rdcCs|}t|ts$t|}xt|D]}d|krPd||>> d = parse_dict_header('foo="is a fish", bar="as well"') >>> type(d) is dict True >>> sorted(d.items()) [('bar', 'as well'), ('foo', 'is a fish')] If there is no value for a key it will be `None`: >>> parse_dict_header('key_without_value') {'key_without_value': None} To create a header from the :class:`dict` again, use the :func:`dump_header` function. .. versionchanged:: 0.9 Added support for `cls` argument. :param value: a string with a dict header. :param cls: callable to use for storage of parsed results. :return: an instance of `cls` =NrrErNrN)r8r rBrasplitrP)rJclsrbrcnamer<r<r=parse_dict_headeres    0ric Cs|sdifSg}d|jdd}xj|rtj|}|sKP|j|jdi}|jd}d}x|rktj|}|sP|j\}} } } } | sd}n| s|} | }t|}| dk r%t| |dk} | dk r%t| j | } | rH|j |d| ||>> parse_options_header('text/html; charset=utf8') ('text/html', {'charset': 'utf8'}) This should not be used to parse ``Cache-Control`` like headers that use a slightly different format. For these headers use the :func:`parse_dict_header` function. .. versionchanged:: 0.15 :rfc:`2231` parameter continuations are handled. .. versionadded:: 0.5 :param value: the header to parse. :param multiple: Whether try to parse and return multiple MIME types :return: (mimetype, options) or (mimetype, options, mimetype, options, …) if multiple=True rC, rrMNfilenameF) rI_option_header_start_mime_typematchrQgroup_option_header_piece_regroupsrP_unquoterAgetendtuple) rJmultiplerbrnrTrestZcontinued_encodingZoptmatchoptioncountencodinglanguageZ option_valuer<r<r=parse_options_headersH            r|cCs|dkrt}|s"|dSg}xotj|D]^}|jd}|s\d}nttt|dd}|j|jd|fq8W||S)aParses an HTTP Accept-* header. This does not implement a complete valid algorithm but one that supports at least value and quality extraction. Returns a new :class:`Accept` object (basically a list of ``(value, quality)`` tuples sorted by the quality with some additional accessor methods). The second parameter can be a subclass of :class:`Accept` that is created with the parsed values and returned. :param value: the accept header string to be parsed. :param cls: the wrapper class for the return value (can be :class:`Accept` or a subclass thereof) :return: an instance of `cls`. NrMrr)Accept _accept_refinditerromaxminfloatrQ)rJrgrbrnZqualityr<r<r=parse_accept_headers    rcCs8|dkrt}|s%|d|S|t||S)aParse a cache control header. The RFC differs between response and request cache control, this method does not. It's your responsibility to not use the wrong control statements. .. versionadded:: 0.5 The `cls` was added. If not specified an immutable :class:`~werkzeug.datastructures.RequestCacheControl` is returned. :param value: a cache control header to be parsed. :param on_update: an optional callable that is called every time a value on the :class:`~werkzeug.datastructures.CacheControl` object is changed. :param cls: the class for the returned object. By default :class:`~werkzeug.datastructures.RequestCacheControl` is used. :return: a `cls` object. N)RequestCacheControlri)rJ on_updatergr<r<r=parse_cache_control_headers   rcCs|dkrt}|dkr+|d|Sg}xl|jdD][}|j}d|krA|jjdd\}}|j|j|jfqAW|||S)aParse a Content Security Policy header. .. versionadded:: 1.0.0 Support for Content Security Policy headers was added. :param value: a csp header to be parsed. :param on_update: an optional callable that is called every time a value on the object is changed. :param cls: the class for the returned object. By default :class:`~werkzeug.datastructures.ContentSecurityPolicy` is used. :return: a `cls` object. N; r)ContentSecurityPolicyrfstriprQ)rJrrgr]policyZ directiver<r<r=parse_csp_headers     #rcCs&|std|Stt||S)aParse a set-like header and return a :class:`~werkzeug.datastructures.HeaderSet` object: >>> hs = parse_set_header('token, "quoted value"') The return value is an object that treats the items case-insensitively and keeps the order of the items: >>> 'TOKEN' in hs True >>> hs.index('quoted value') 1 >>> hs HeaderSet(['token', 'quoted value']) To create a header from the :class:`HeaderSet` again, use the :func:`dump_header` function. :param value: a set header to be parsed. :param on_update: an optional callable that is called every time a value on the :class:`~werkzeug.datastructures.HeaderSet` object is changed. :return: a :class:`~werkzeug.datastructures.HeaderSet` N) HeaderSetrd)rJrr<r<r=parse_set_header+s rcCsF|s dSt|}y(|jdd\}}|j}Wntk rVdSYnX|dkry%tj|jdd\}}Wntk rdSYnXtddt|t dt|t iS|dkrBt |}xdD]}||krdSqWd |kr5|j d s1|j d r5dStd|SdS)awParse an HTTP basic/digest authorization header transmitted by the web browser. The return value is either `None` if the header was invalid or not given, otherwise an :class:`~werkzeug.datastructures.Authorization` object. :param value: the authorization header to parse. :return: a :class:`~werkzeug.datastructures.Authorization` object or `None`. Nrsbasic:basicusernamepasswordsdigestrealmnonceuriresponseqopZnccnoncedigest)rrrrr) r>rflower ValueErrorbase64 b64decode Exception Authorizationr_basic_auth_charsetrirs)rJ auth_type auth_inforrZauth_maprVr<r<r=parse_authorization_headerIs4     %        rc Cs|std|Sy(|jdd\}}|j}Wn4ttfk rqt|jjd|SYnXt|t||S)aParse an HTTP WWW-Authenticate header into a :class:`~werkzeug.datastructures.WWWAuthenticate` object. :param value: a WWW-Authenticate header to parse. :param on_update: an optional callable that is called every time a value on the :class:`~werkzeug.datastructures.WWWAuthenticate` object is changed. :return: a :class:`~werkzeug.datastructures.WWWAuthenticate` object. rNr)WWWAuthenticaterfrrAttributeErrorrri)rJrrrr<r<r=parse_www_authenticate_headerqs  !rcCsF|s tSt|}|dk r2td|Stt|dS)zParses an if-range header which can be an etag or a date. Returns a :class:`~werkzeug.datastructures.IfRange` object. .. versionadded:: 0.7 Ndater)IfRange parse_date unquote_etag)rJrr<r<r=parse_if_range_headers    rc Cs| sd|krdSg}d}|jdd\}}|jj}xV|jdD]E}|j}d|krdS|jdr|dkrdSyt|}Wntk rdSYnXd}d}nd|kr|jdd\}}|j}|j}|js"dSt|}||ksF|dkrJdS|r|js`dSt|d}||krdSnd}|}|j||fq]Wt||S)aParses a range header into a :class:`~werkzeug.datastructures.Range` object. If the header is missing or malformed `None` is returned. `ranges` is a list of ``(start, stop)`` tuples where the ranges are non-inclusive. .. versionadded:: 0.7 reNrrrj-rN) rfrr startswithintrisdigitrQRange) rJZmake_inclusiverangesZlast_endunitsrngrcbeginrtr<r<r=parse_range_headersL             rcCsb|dkrdSy(|pdjjdd\}}Wntk rPdSYnXd|kradS|jdd\}}|dkrd}n|jrt|}ndS|dkrt|dd|d|Sd|krdS|jdd\}}y t|}t|d}Wntk r2dSYnXt|||r^t||||d|SdS)aParses a range header into a :class:`~werkzeug.datastructures.ContentRange` object or `None` if parsing is not possible. .. versionadded:: 0.7 :param value: a content range header to be parsed. :param on_update: an optional callable that is called every time a value on the :class:`~werkzeug.datastructures.ContentRange` object is changed. NrCr/*rr)rrfrrr ContentRangeis_byte_range_valid)rJrrZrangedefrlengthstartstopr<r<r=parse_content_range_headers4 (           rcCs6d|krtdd|}|r2d|}|S)ziQuote an etag. :param etag: the etag to quote. :param weak: set to `True` to tag it "weak". rEz invalid etagz"%s"zW/)r)etagweakr<r<r= quote_etags     rcCs|s d S|j}d}|jd rAd}|dd}|dd|d dkoldknr|dd }||fS) zUnquote a single etag: >>> unquote_etag('W/"bar"') ('bar', True) >>> unquote_etag('"bar"') ('bar', False) :param etag: the etag identifier to unquote. :return: a ``(etag, weak)`` tuple. NFW/w/TrMrrE)NN)rrrNrN)rr)rrr<r<r=rs  0rc Cs|s tSg}g}t|}d}x||krtj||}|dkrYP|j\}}}|dkrtddS|r|}|r|j|n |j||j}q.Wt||S)zParse an etag header. :param value: the tag header to parse :return: an :class:`~werkzeug.datastructures.ETags` object. rNrZstar_tagT)ETagslen_etag_rernrqrQrt) rJstrongrrtposrnZis_weakquotedrawr<r<r= parse_etagss(     rcCst|jS)zGenerate an etag for some data.)r hexdigest)r;r<r<r= generate_etag7src Cs|rt|j}|dk ry|d}|dkrV|dkrV|d7}n"|dkrx|dkrx|d7}t|f|dd td |d pdSWnttfk rdSYnXdS) aParse one of the following date formats into a datetime object: .. sourcecode:: text Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123 Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036 Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format If parsing fails the return value is `None`. :param value: a string with a supported date format. :return: a :class:`datetime.datetime` object. NrDiEcilrsecondsrN)rrrrr OverflowError)rJtyearr<r<r=r<s    6rcCs|dkrt}n?t|tr6|j}n!t|ttfrWt|}dd|j|j|d|jd||j |j |j |j f S)z'Used for `http_date` and `cookie_date`.Nz%%s, %02d%s%s%s%04d %02d:%02d:%02d GMTMonTueWedThuFriSatSunJanFebMarAprMayJunJulAugSepOctNovDecr)rrrrrrr) rrrrrrrrrrrr) rr8r utctimetuplerrtm_wdaytm_mdaytm_montm_yeartm_hourtm_mintm_sec)ddelimr<r<r= _dump_date\s8     rcCs t|dS)aFormats the time to ensure compatibility with Netscape's cookie standard. Accepts a floating point number expressed in seconds since the epoch in, a datetime object or a timetuple. All times in UTC. The :func:`parse_date` function can be used to parse such a date. Outputs a string in the format ``Wdy, DD-Mon-YYYY HH:MM:SS GMT``. :param expires: If provided that date is used, otherwise the current. r)r)rr<r<r= cookie_date~s rcCs t|dS)aFormats the time to match the RFC1123 date format. Accepts a floating point number expressed in seconds since the epoch in, a datetime object or a timetuple. All times in UTC. The :func:`parse_date` function can be used to parse such a date. Outputs a string in the format ``Wdy, DD Mon YYYY HH:MM:SS GMT``. :param timestamp: If provided that date is used, otherwise the current. r)r) timestampr<r<r= http_dates rcCsq|s dSyt|}Wntk r2dSYnX|dkrCdSytd|SWntk rldSYnXdS)zParses a base-10 integer count of seconds into a timedelta. If parsing fails, the return value is `None`. :param value: a string consisting of an integer represented in base-10 :return: a :class:`datetime.timedelta` object or `None`. Nrr)rrrr)rJrr<r<r= parse_ages    rcCse|dkrdSt|tr7|j|jdd}t|}|dkr[tdt|S)zFormats the duration as a base-10 integer. :param age: should be an integer number of seconds, a :class:`datetime.timedelta` object, or, if the age is unknown, `None` (default). Nirzage cannot be negative)r8rrdaysrrr@)Zager<r<r=dump_ages    rc Cs|dkr'|dk r't|}n|dk r?tdd}t|tr`t|}|dk r~|jdd}d}| rd|krt|jd}|dk r|jdk r|j}nt|jd}|r|r||krd }|rt |\}}|dk rT|j dk rTt |j j |}nUt |jd } | r~| j |}t |jd } | r| j| }| S) aConvenience method for conditional requests. :param environ: the WSGI environment of the request to be checked. :param etag: the etag for the response for comparison. :param data: or alternatively the data of the response to automatically generate an etag using :func:`generate_etag`. :param last_modified: an optional date of the last modification. :param ignore_if_range: If `False`, `If-Range` header will be taken into account. :return: `True` if the resource was modified, otherwise `False`. .. versionchanged:: 1.0.0 The check is run for methods other than ``GET`` and ``HEAD``. Nzboth data and etag givenF microsecondrZ HTTP_RANGEZ HTTP_IF_RANGEZHTTP_IF_MODIFIED_SINCETZHTTP_IF_NONE_MATCHZ HTTP_IF_MATCH)r TypeErrorr8r rrIrrsrrrrcontainsZ contains_weakZ is_strong) environrr;Z last_modifiedZignore_if_rangeZ unmodifiedZif_rangeZmodified_since_Z if_none_matchZif_matchr<r<r=is_resource_modifieds8     rcs@tddDfdd|D|dd.csAg|]7\}}t| s1|jkr||fqSr<)is_entity_headerr)rXrVrJ)allowedr<r=rZs  z)remove_entity_headers..N)rG)headersrr<)rr=remove_entity_headers s rcCs!dd|D|dd.Nr<)rr<r<r=remove_hop_by_hop_headerss rcCs|jtkS)zCheck if a header is an entity header. .. versionadded:: 0.5 :param header: the header to test. :return: `True` if it's an entity header, `False` otherwise. )r_entity_headers)rSr<r<r=r,srcCs|jtkS)zCheck if a header is an HTTP/1.1 "Hop-by-Hop" header. .. versionadded:: 0.5 :param header: the header to test. :return: `True` if it's an HTTP/1.1 "Hop-by-Hop" header, `False` otherwise. )r_hop_by_hop_headers)rSr<r<r=r7srrIcsttr$jddndkr6dttrWjdd|dkrit}fdd}||S)a]Parse a cookie from a string or WSGI environ. The same key can be provided multiple times, the values are stored in-order. The default :class:`MultiDict` will have the first value first, and all values can be retrieved with :meth:`MultiDict.getlist`. :param header: The cookie header as a string, or a WSGI environ dict with a ``HTTP_COOKIE`` key. :param charset: The charset for the cookie values. :param errors: The error behavior for the charset decoding. :param cls: A dict-like class to store the parsed cookies in. Defaults to :class:`MultiDict`. .. versionchanged:: 1.0.0 Returns a :class:`MultiDict` instead of a ``TypeConversionDict``. .. versionchanged:: 0.5 Returns a :class:`TypeConversionDict` instead of a regular dict. The ``cls`` parameter was added. Z HTTP_COOKIErCNrrIc3skxdtD]V\}}t|dd}|s:q t|dd}t||fVq WdS)NZallow_none_charsetT)rrr)rVval)charseterrorsrSr<r= _parse_pairsfs z"parse_cookie.._parse_pairs)r8r[rsr r: MultiDict)rSr r rgr r<)r r rSr= parse_cookieBs  r ric  Cst||}t||}|dk rIddlm} | ||}t|}t|tr|jddd|j}|dk rt|tst |}n+|dk r| rtt t |}| dk r| j } | dkrt d |d t |g} xd |d fd |dfd|dfd|dfd|dfd|dfd| dffD]\}}}|dkr|rw| j|qw|dkrqwt|}t|ttfstt||}|rt |}|d |7}| jt|qwWdj| }tsH|jd}t|}| r|| krt|}tjdjd|d|d||d|d| dd|S)a Creates a new Set-Cookie header without the ``Set-Cookie`` prefix The parameters are the same as in the cookie Morsel object in the Python standard library but it accepts unicode data, too. On Python 3 the return value of this function will be a unicode string, on Python 2 it will be a native string. In both cases the return value is usually restricted to ascii as the vast majority of values are properly escaped, but that is no guarantee. If a unicode string is returned it's tunneled through latin1 as required by PEP 3333. The return value is not ASCII safe if the key contains unicode characters. This is technically against the specification but happens in the wild. It's strongly recommended to not use non-ASCII values for the keys. :param max_age: should be a number of seconds, or `None` (default) if the cookie should last only as long as the client's browser session. Additionally `timedelta` objects are accepted, too. :param expires: should be a `datetime` object or unix timestamp. :param path: limits the cookie to a given path, per default it will span the whole domain. :param domain: Use this if you want to set a cross-domain cookie. For example, ``domain=".example.com"`` will set a cookie that is readable by the domain ``www.example.com``, ``foo.example.com`` etc. Otherwise, a cookie will only be readable by the domain that set it. :param secure: The cookie will only be available via HTTPS :param httponly: disallow JavaScript to access the cookie. This is an extension to the cookie standard and probably not supported by all browsers. :param charset: the encoding for unicode values. :param sync_expires: automatically set expires if max_age is defined but expires not. :param max_size: Warn if the final header value exceeds this size. The default, 4093, should be safely `supported by most browsers `_. Set to 0 to disable this check. :param samesite: Limits the scope of the cookie such that it will only be attached to requests if those requests are same-site. .. _`cookie`: http://browsercookielimits.squawky.net/ .. versionchanged:: 1.0.0 The string ``'None'`` is accepted for ``samesite``. Nr) iri_to_uri<rStrictLaxNonez,SameSite must be 'Strict', 'Lax', or 'None'.=sDomainTsExpiresFsMax-AgesSecuresHttpOnlysPathsSameSites; rzThe "{key}" cookie is too large: the value was {value_size} bytes but the header required {extra_size} extra bytes. The final size was {cookie_size} bytes but the limit is {max_size} bytes. 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