�`^c@sF
dZd
g
Z
ddlZddlZddlmZmZmZmZ
ddl	Z	ej
d�Zej
d�Zde
f
d��YZd	�Zd
�Zddd��YZd
dd��YZddd��YZdd d��YZdd!d��YZd�Zd�Zd�Zd�Zd�Zd�Zd�Zd�ZdS("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	validatori�N(tDictTypet
StringTypet	TupleTypetListTypes^[a-zA-Z][a-zA-Z0-9\-_]*$s[\000-\037]tWSGIWarningc
BseZ
dZRS(
s:
    Raised in response to WSGI-spec-related warnings
    (t__name__t
__module__t__doc__(((s&/sys/lib/python2.7/wsgiref/validate.pyRzsc
Gs|st|
��ndS(
N(
tAssertionError(tcondtargs((s&/sys/lib/python2.7/wsgiref/validate.pytassert_s

c
s�f
d
�}
|
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 raise 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 raise an exception
    at that point).
    cs�tt
|�d
kd�
t|
d�
|\}�t|�
g���fd�}t|d�|d<t|d�|d<�||�}t|dk	o�|tkd�
t|�
t|��S(NisTwo arguments requiredsNo keyword arguments allowedcs�tt
|�d
kp$t
|�dkd|f
�
t|
d�
|d}|d}t
|�dkrs|d
}nd}t|�
t|�
t||�
t|�
�jd�
t�|��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&/sys/lib/python2.7/wsgiref/validate.pytstart_response_wrapper�s
$

















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&/sys/lib/python2.7/wsgiref/validate.pytlint_app�s







((R$R%((
R$s&/sys/lib/python2.7/wsgiref/validate.pyR�s)Rc
Bs>eZ
d�Zd
�Zd�Zd�Zd�Zd�ZRS(cCs
|
|_dS(
N(
tinput(tselft
wsgi_input((s&/sys/lib/python2.7/wsgiref/validate.pyt__init__�s
c
GsHtt
|
�d
k
�
|jj|
�}tt|�td�k�
|S(Ni
t(RR
R&treadttype(R'Rt
v((s&/sys/lib/python2.7/wsgiref/validate.pyR+�s



c
Cs/|jj
�}
tt|
�td
�k�
|
S(NR*(R&treadlineRR,(R'R-((s&/sys/lib/python2.7/wsgiref/validate.pyR.�s


c
Gsutt
|
�d
k
�
|jj|
�}tt|�tg�k�
x*|D]"}tt|�td�k�
qKW|S(Ni
R*(RR
R&t	readlinesR,(R'Rtlinestline((s&/sys/lib/python2.7/wsgiref/validate.pyR/�s





 
c

cs%x|j�}
|
sdS|
V
qdS(
N(
R.(R'R1((s&/sys/lib/python2.7/wsgiref/validate.pyt__iter__�s





c

Cstd
d�
dS(Nis input.close() must not be called(
R(
R'((s&/sys/lib/python2.7/wsgiref/validate.pytclose�s
(RRR)R+R.R/R2R3(((s&/sys/lib/python2.7/wsgiref/validate.pyR�s					Rc
Bs5eZ
d�Zd
�Zd�Zd�Zd�ZRS(cCs
|
|_dS(
N(
terrors(R'twsgi_errors((s&/sys/lib/python2.7/wsgiref/validate.pyR)�s
cCs0tt
|
�t
d
�k�
|jj|
�
dS(NR*(RR,R4twrite(R't
s((s&/sys/lib/python2.7/wsgiref/validate.pyR6�s

c


Cs|jj
�
dS(
N(R4tflush(
R'((s&/sys/lib/python2.7/wsgiref/validate.pyR8�s
cCs"x|
D]}|j|�
qWdS(
N(
R6(R'tseqR1((s&/sys/lib/python2.7/wsgiref/validate.pyt
writelines�s


c

Cstd
d�
dS(Nis!errors.close() must not be called(
R(
R'((s&/sys/lib/python2.7/wsgiref/validate.pyR3�s
(RRR)R6R8R:R3(((s&/sys/lib/python2.7/wsgiref/validate.pyR�s
				Rc
BseZ
d�Zd
�ZRS(cCs
|
|_dS(
N(
twriter(R'twsgi_writer((s&/sys/lib/python2.7/wsgiref/validate.pyR)�s
cCs-tt
|
�t
d
�k�
|j|
�
dS(NR*(RR,R;(R'R7((s&/sys/lib/python2.7/wsgiref/validate.pyt__call__�s

(RRR)R=(((s&/sys/lib/python2.7/wsgiref/validate.pyR�s	tPartialIteratorWrapperc
BseZ
d�Zd
�ZRS(cCs
|
|_dS(
N(
R#(R't
wsgi_iterator((s&/sys/lib/python2.7/wsgiref/validate.pyR)�s
c

Cst|j
d�S(
N(R!R#R(
R'((s&/sys/lib/python2.7/wsgiref/validate.pyR2�s(RRR)R2(((s&/sys/lib/python2.7/wsgiref/validate.pyR>�s	R!c
Bs5eZ
d�Zd
�Zd�Zd�Zd�ZRS(cCs.|
|_t
|
�|_t|_||_dS(
N(toriginal_iteratortiterR#Rtclosedtcheck_start_response(R'R?RC((s&/sys/lib/python2.7/wsgiref/validate.pyR)
s
	

	
c


Cs|S(
N((
R'((s&/sys/lib/python2.7/wsgiref/validate.pyR2	
s
c
CsOt|j
d
�
|jj�}
|jdk	rKt|jd�
d|_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&/sys/lib/python2.7/wsgiref/validate.pyRD
s





	


c

Cs/t|_
t|jd
�r+|jj�
ndS(NR3(tTrueRBthasattrR@R3(
R'((s&/sys/lib/python2.7/wsgiref/validate.pyR3
s
	

c

Cs0|jst
jjd
�
nt|jd
�
dS(Ns/Iterator garbage collected without being closed(RBtsyststderrR6R(
R'((s&/sys/lib/python2.7/wsgiref/validate.pyt__del__
s

	
	


	
(RRR)R2RDR3RI(((s&/sys/lib/python2.7/wsgiref/validate.pyR!

s
			
	c
	Cs�tt
|�tkd
t
|�|f�
xCdddddddd	d
g	D] }
t|
|kd|
f
�
qKWx5dd
gD]'}
t|
|kd|
|
df�
q|Wd|kr�tjdt�
nx^|j�D]P}
d|
kr��ntt
||
�tkd|
t
||
�||
f�
q�Wtt
|d�tkd|df
�
t|dd+kd|d�
t	|d�
t
|d�
|dd,kr�tjd |dt�
nt|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$Environment missing required key: %rtHTTP_CONTENT_TYPEtHTTP_CONTENT_LENGTHs8Environment should not have the key: %s (use %s instead)itQUERY_STRINGs�QUERY_STRING is not in the WSGI environment; the cgi module will use sys.argv when this variable is missing, so application errors are more likelyt
.s9Environmental variable %s is not a string: %r (value: %r)s#wsgi.version should be a tuple (%r)swsgi.url_schemethttpthttpsswsgi.url_scheme unknown: %rtGETtHEADtPOSTtOPTIONStPUTtDELETEtTRACEsUnknown REQUEST_METHOD: %rtSCRIPT_NAMEt
/s$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,R
twarningstwarnRtkeysRRtcheck_inputtcheck_errorstgett
startswithtint(R"tkey((s&/sys/lib/python2.7/wsgiref/validate.pyR"
s`



	














#




	















c
CsAx:d
dddgD]&}
tt
||
�d||
f�
qWdS(NR+R.R/R2s-wsgi.input (%r) doesn't have the attribute %s(RRF(R(tattr((s&/sys/lib/python2.7/wsgiref/validate.pyRac
s



c
Cs>x7d
ddgD]&}
tt
||
�d||
f�
qWdS(NR8R6R:s.wsgi.errors (%r) doesn't have the attribute %s(RRF(R5Rg((s&/sys/lib/python2.7/wsgiref/validate.pyRbi
s



c
Cs�tt
|�tkd
|�
|jdd�d}
tt|
�dkd|
�
t|
�}t|dkd|�
t|�dks�|dd	kr�tjd
|t	�
ndS(Ns Status must be a string (not %r)i
iis)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&/sys/lib/python2.7/wsgiref/validate.pyRo
s






"

c
Cs_
tt
|�tkd
|t
|�f�
i}
x)
|D]!
}tt
|�tkd|t
|�f�
tt|�dk�
|\}}t|j�dkd|�
d|
|j�<td|ko�d|kd|�
ttj|�d	|�
t|j	d
�o
|j	d�d|�
t
j|�r6td
d|t
j|�jd
�f�
q6q6WdS(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&/sys/lib/python2.7/wsgiref/validate.pyR~
s,

















 


	
cCs�t|j
dd
�d�}d}xJ|
D]B\}}|j�dkr)||krWdStdd|�
q)q)W||kr�tdd|
�
ndS(	Ni
ii�i0
scontent-typesJContent-Type header found in a %s response, which must not return content.s,No Content-Type header found in headers (%s)(i�i0
(ReRiRRoR(RRtcodetNO_MESSAGE_BODYRwRx((s&/sys/lib/python2.7/wsgiref/validate.pyR�s





	


c

Cs?t|dkp$t|�td�kd
|t|�f�
dS(Ns exc_info (%r) is not a tuple: %r((RRR,(
R((s&/sys/lib/python2.7/wsgiref/validate.pyR�s
$
c

Cstt
|t�d
�
dS(NsvYou should not return a string as your application iterator, instead return a single-item list containing that string.(Rt
isinstancetstr(
R#((s&/sys/lib/python2.7/wsgiref/validate.pyR �s
((((((Rt__all__treRGttypesR
RRRR^tcompileRpRstWarningRRRRRRR>R!RRaRbRRRRR (((s&/sys/lib/python2.7/wsgiref/validate.pyt<module>ns.
	

"

		7"		!	A