Your IP : 172.28.240.42

Current Path : /usr/lib/python2.7/wsgiref/
Upload File :
Current File : //usr/lib/python2.7/wsgiref/validate.pyc


|_c@sFdZdgZddlZddlZddlmZmZmZmZddl	Z	ej
dZej
dZde
fdYZd	Zd
ZdddYZd
ddYZdddYZdd dYZdd!dYZdZdZdZdZdZdZdZdZdS("s"
Middleware to check for obedience to the WSGI specification.

Some of the things this checks:

* Signature of the application and start_response (including that
  keyword arguments are not used).

* Environment checks:

  - Environment is a dictionary (and not a subclass).

  - That all the required keys are in the environment: REQUEST_METHOD,
    SERVER_NAME, SERVER_PORT, wsgi.version, wsgi.input, wsgi.errors,
    wsgi.multithread, wsgi.multiprocess, wsgi.run_once

  - That HTTP_CONTENT_TYPE and HTTP_CONTENT_LENGTH are not in the
    environment (these headers should appear as CONTENT_LENGTH and
    CONTENT_TYPE).

  - Warns if QUERY_STRING is missing, as the cgi module acts
    unpredictably in that case.

  - That CGI-style variables (that don't contain a .) have
    (non-unicode) string values

  - That wsgi.version is a tuple

  - That wsgi.url_scheme is 'http' or 'https' (@@: is this too
    restrictive?)

  - Warns if the REQUEST_METHOD is not known (@@: probably too
    restrictive).

  - That SCRIPT_NAME and PATH_INFO are empty or start with /

  - That at least one of SCRIPT_NAME or PATH_INFO are set.

  - That CONTENT_LENGTH is a positive integer.

  - That SCRIPT_NAME is not '/' (it should be '', and PATH_INFO should
    be '/').

  - That wsgi.input has the methods read, readline, readlines, and
    __iter__

  - That wsgi.errors has the methods flush, write, writelines

* The status is a string, contains a space, starts with an integer,
  and that integer is in range (> 100).

* That the headers is a list (not a subclass, not another kind of
  sequence).

* That the items of the headers are tuples of strings.

* That there is no 'status' header (that is used in CGI, but not in
  WSGI).

* That the headers don't contain newlines or colons, end in _ or -, or
  contain characters codes below 037.

* That Content-Type is given if there is content (CGI often has a
  default content type, but WSGI does not).

* That no Content-Type is given when there is no content (@@: is this
  too restrictive?)

* That the exc_info argument to start_response is a tuple or None.

* That all calls to the writer are with strings, and no other methods
  on the writer are accessed.

* That wsgi.input is used properly:

  - .read() is called with zero or one argument

  - That it returns a string

  - That readline, readlines, and __iter__ return strings

  - That .close() is not called

  - No other methods are provided

* That wsgi.errors is used properly:

  - .write() and .writelines() is called with a string

  - That .close() is not called, and no other methods are provided.

* The response iterator:

  - That it is not a string (it should be a list of a single string; a
    string will work, but perform horribly).

  - That .next() returns a string

  - That the iterator is not iterated over until start_response has
    been called (that can signal either a server or application
    error).

  - That .close() is called (doesn't raise exception, only prints to
    sys.stderr, because we only know it isn't called when the object
    is garbage collected).
t	validatoriN(tDictTypet
StringTypet	TupleTypetListTypes^[a-zA-Z][a-zA-Z0-9\-_]*$s[\000-\037]tWSGIWarningcBseZdZRS(s:
    Raised in response to WSGI-spec-related warnings
    (t__name__t
__module__t__doc__(((s&/usr/lib/python2.7/wsgiref/validate.pyRzscGs|st|ndS(N(tAssertionError(tcondtargs((s&/usr/lib/python2.7/wsgiref/validate.pytassert_scsfd}|S(s
    When applied between a WSGI server and a WSGI application, this
    middleware will check for WSGI compliancy on a number of levels.
    This middleware does not modify the request or response in any
    way, but will throw an AssertionError if anything seems off
    (except for a failure to close the application iterator, which
    will be printed to stderr -- there's no way to throw an exception
    at that point).
    cstt|dkdt|d|\}t|gfd}t|d|d<t|d|d<||}t|dk	o|tkdt|t|S(NisTwo arguments requiredsNo keyword arguments allowedcstt|dkp$t|dkd|ft|d|d}|d}t|dkrs|d}nd}t|t|t||t|jdt|S(NiisInvalid number of arguments: %ssNo keyword arguments allowedii(	RtlentNonetcheck_statust
check_headerstcheck_content_typetcheck_exc_infotappendtWriteWrapper(Rtkwtstatustheaderstexc_info(tstart_responsetstart_response_started(s&/usr/lib/python2.7/wsgiref/validate.pytstart_response_wrappers$







s
wsgi.inputswsgi.errorss>The application must return an iterator, if only an empty list(	RR
t
check_environtInputWrappertErrorWrapperRtFalsetcheck_iteratortIteratorWrapper(RRtenvironRtiterator(tapplication(RRs&/usr/lib/python2.7/wsgiref/validate.pytlint_apps

((R$R%((R$s&/usr/lib/python2.7/wsgiref/validate.pyRs)RcBs>eZdZdZdZdZdZdZRS(cCs
||_dS(N(tinput(tselft
wsgi_input((s&/usr/lib/python2.7/wsgiref/validate.pyt__init__scGsHtt|dk|jj|}tt|tdk|S(Nit(RR
R&treadttype(R'Rtv((s&/usr/lib/python2.7/wsgiref/validate.pyR+scCs/|jj}tt|tdk|S(NR*(R&treadlineRR,(R'R-((s&/usr/lib/python2.7/wsgiref/validate.pyR.scGsutt|dk|jj|}tt|tgkx*|D]"}tt|tdkqKW|S(NiR*(RR
R&t	readlinesR,(R'Rtlinestline((s&/usr/lib/python2.7/wsgiref/validate.pyR/s
 ccs%x|j}|sdS|VqdS(N(R.(R'R1((s&/usr/lib/python2.7/wsgiref/validate.pyt__iter__s
cCstdddS(Nis input.close() must not be called(R(R'((s&/usr/lib/python2.7/wsgiref/validate.pytcloses(RRR)R+R.R/R2R3(((s&/usr/lib/python2.7/wsgiref/validate.pyRs					RcBs5eZdZdZdZdZdZRS(cCs
||_dS(N(terrors(R'twsgi_errors((s&/usr/lib/python2.7/wsgiref/validate.pyR)scCs0tt|tdk|jj|dS(NR*(RR,R4twrite(R'ts((s&/usr/lib/python2.7/wsgiref/validate.pyR6scCs|jjdS(N(R4tflush(R'((s&/usr/lib/python2.7/wsgiref/validate.pyR8scCs"x|D]}|j|qWdS(N(R6(R'tseqR1((s&/usr/lib/python2.7/wsgiref/validate.pyt
writeliness
cCstdddS(Nis!errors.close() must not be called(R(R'((s&/usr/lib/python2.7/wsgiref/validate.pyR3s(RRR)R6R8R:R3(((s&/usr/lib/python2.7/wsgiref/validate.pyRs
				RcBseZdZdZRS(cCs
||_dS(N(twriter(R'twsgi_writer((s&/usr/lib/python2.7/wsgiref/validate.pyR)scCs-tt|tdk|j|dS(NR*(RR,R;(R'R7((s&/usr/lib/python2.7/wsgiref/validate.pyt__call__s(RRR)R=(((s&/usr/lib/python2.7/wsgiref/validate.pyRs	tPartialIteratorWrappercBseZdZdZRS(cCs
||_dS(N(R#(R't
wsgi_iterator((s&/usr/lib/python2.7/wsgiref/validate.pyR)scCst|jdS(N(R!R#R(R'((s&/usr/lib/python2.7/wsgiref/validate.pyR2s(RRR)R2(((s&/usr/lib/python2.7/wsgiref/validate.pyR>s	R!cBs5eZdZdZdZdZdZRS(cCs.||_t||_t|_||_dS(N(toriginal_iteratortiterR#Rtclosedtcheck_start_response(R'R?RC((s&/usr/lib/python2.7/wsgiref/validate.pyR)s		cCs|S(N((R'((s&/usr/lib/python2.7/wsgiref/validate.pyR2	scCsOt|jd|jj}|jdk	rKt|jdd|_n|S(NsIterator read after closedsjThe application returns and we started iterating over its body, but start_response has not yet been called(RRBR#tnextRCR(R'R-((s&/usr/lib/python2.7/wsgiref/validate.pyRDs
	cCs/t|_t|jdr+|jjndS(NR3(tTrueRBthasattrR@R3(R'((s&/usr/lib/python2.7/wsgiref/validate.pyR3s	cCs0|jstjjdnt|jddS(Ns/Iterator garbage collected without being closed(RBtsyststderrR6R(R'((s&/usr/lib/python2.7/wsgiref/validate.pyt__del__s
		
	(RRR)R2RDR3RI(((s&/usr/lib/python2.7/wsgiref/validate.pyR!s
			
	c	Cstt|tkdt||fxCdddddddd	d
g	D] }t||kd|fqKWx5dd
gD]'}t||kd||dfq|Wd|krtjdtnx^|jD]P}d|krqntt||tkd|t||||fqWtt|dtkd|dft|dd+kd|dt	|dt
|d|dd,krtjd |dtnt|jd!p|d!jd"d#|d!t|jd$p
|d$jd"d%|d$|jd&rPtt
|d&d'kd(|d&n|jd!sutd$|kd)nt|jd!d"kd*dS(-Ns:Environment is not of the right type: %r (environment: %r)tREQUEST_METHODtSERVER_NAMEtSERVER_PORTswsgi.versions
wsgi.inputswsgi.errorsswsgi.multithreadswsgi.multiprocesss
wsgi.run_onces$Environment missing required key: %rtHTTP_CONTENT_TYPEtHTTP_CONTENT_LENGTHs8Environment should not have the key: %s (use %s instead)itQUERY_STRINGsQUERY_STRING is not in the WSGI environment; the cgi module will use sys.argv when this variable is missing, so application errors are more likelyt.s9Environmental variable %s is not a string: %r (value: %r)s#wsgi.version should be a tuple (%r)swsgi.url_schemethttpthttpsswsgi.url_scheme unknown: %rtGETtHEADtPOSTtOPTIONStPUTtDELETEtTRACEsUnknown REQUEST_METHOD: %rtSCRIPT_NAMEt/s$SCRIPT_NAME doesn't start with /: %rt	PATH_INFOs"PATH_INFO doesn't start with /: %rtCONTENT_LENGTHisInvalid CONTENT_LENGTH: %rsgOne of SCRIPT_NAME or PATH_INFO are required (PATH_INFO should at least be '/' if SCRIPT_NAME is empty)sOSCRIPT_NAME cannot be '/'; it should instead be '', and PATH_INFO should be '/'(RQRR(RSRTRURVRWRXRY(RR,RtwarningstwarnRtkeysRRtcheck_inputtcheck_errorstgett
startswithtint(R"tkey((s&/usr/lib/python2.7/wsgiref/validate.pyR"s`	

#	

cCsAx:ddddgD]&}tt||d||fqWdS(NR+R.R/R2s-wsgi.input (%r) doesn't have the attribute %s(RRF(R(tattr((s&/usr/lib/python2.7/wsgiref/validate.pyRacscCs>x7dddgD]&}tt||d||fqWdS(NR8R6R:s.wsgi.errors (%r) doesn't have the attribute %s(RRF(R5Rg((s&/usr/lib/python2.7/wsgiref/validate.pyRbiscCstt|tkd||jddd}tt|dkd|t|}t|dkd|t|dks|dd	krtjd
|t	ndS(Ns Status must be a string (not %r)iiis)Status codes must be three characters: %ridsStatus code is invalid: %rit sjThe status string (%r) should be a three-digit integer followed by a single space and a status explanation(
RR,RtsplitRR
ReR^R_R(Rtstatus_codet
status_int((s&/usr/lib/python2.7/wsgiref/validate.pyRos"c	Cs_tt|tkd|t|fi}x)|D]!}tt|tkd|t|ftt|dk|\}}t|jdkd|d||j<td|kod|kd|ttj|d	|t|j	d
o|j	dd|t
j|r6td
d|t
j|jd
fq6q6WdS(Ns%Headers (%r) must be of type list: %rs1Individual headers (%r) must be of type tuple: %riRsyThe Status header cannot be used; it conflicts with CGI script, and HTTP status is not given through headers (value: %r).s
t:s,Header names may not contain ':' or '\n': %rsBad header name: %rt-t_s#Names may not end in '-' or '_': %ris#Bad header value: %r (bad char: %r)(RR,RRR
tlowerRt	header_retsearchtendswithtbad_header_value_retgroup(Rtheader_namestitemtnametvalue((s&/usr/lib/python2.7/wsgiref/validate.pyR~s,
 	cCst|jddd}d}xJ|D]B\}}|jdkr)||krWdStdd|q)q)W||krtdd|ndS(	Niiii0scontent-typesJContent-Type header found in a %s response, which must not return content.s,No Content-Type header found in headers (%s)(ii0(ReRiRRoR(RRtcodetNO_MESSAGE_BODYRwRx((s&/usr/lib/python2.7/wsgiref/validate.pyRs	cCs?t|dkp$t|tdkd|t|fdS(Ns exc_info (%r) is not a tuple: %r((RRR,(R((s&/usr/lib/python2.7/wsgiref/validate.pyRs$cCstt|tddS(NsvYou should not return a string as your application iterator, instead return a single-item list containing that string.(Rt
isinstancetstr(R#((s&/usr/lib/python2.7/wsgiref/validate.pyR s((((((Rt__all__treRGttypesRRRRR^tcompileRpRstWarningRRRRRRR>R!RRaRbRRRRR (((s&/usr/lib/python2.7/wsgiref/validate.pyt<module>ns.	"		7"		!	A