OwlCyberSecurity - MANAGER
Edit File: validate.cpython-35.pyc
��Yf;; � @ sN d Z d g Z d d l Z d d l Z d d l Z e j d � Z e j d � Z Gd d � d e � Z d d � Z d d � Z d d � Z Gd d � d � Z Gd d � d � Z Gd d � d � Z Gd d � d � Z Gd d � d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d! d" � Z d# d$ � Z d% d& � Z d S)'a& 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). � validator� Nz^[a-zA-Z][a-zA-Z0-9\-_]*$z [\000-\037]c @ s e Z d Z d Z d S)� WSGIWarningz: Raised in response to WSGI-spec-related warnings N)�__name__� __module__� __qualname__�__doc__� r r �5/opt/alt/python35/lib64/python3.5/wsgiref/validate.pyr y s r c G s | s t | � � d S)N)�AssertionError)Zcond�argsr r r �assert_~ s r c C s8 t | � t k r | St d j | t | � � � � d S)Nz!{0} must be of type str (got {1}))�type�strr �format�repr)�value�titler r r �check_string_type� s r c s � f d d � } | S)a� When applied between a WSGI server and a WSGI application, this middleware will check for WSGI compliancy on a number of levels. This middleware does not modify the request or response in any way, but will raise an AssertionError if anything seems off (except for a failure to close the application iterator, which will be printed to stderr -- there's no way to raise an exception at that point). c s� t t | � d k d � t | d � | \ } � t | � g � � � f d d � } t | d � | d <t | d � | d <� | | � } t | d k o� | d k d � t | � t | � � S) N� zTwo arguments requiredz No keyword arguments allowedc s� t t | � d k p$ t | � d k d | f � t | d � | d } | d } t | � d k rs | d } n d } t | � t | � t | | � t | � � j d � t � | � � S)Nr � z Invalid number of arguments: %sz No keyword arguments allowedr � )r �len� check_status� check_headers�check_content_type�check_exc_info�append� WriteWrapper)r �kw�status�headers�exc_info)�start_response�start_response_startedr r �start_response_wrapper� s $ z;validator.<locals>.lint_app.<locals>.start_response_wrapperz wsgi.inputz wsgi.errorsFz>The application must return an iterator, if only an empty list)r r � check_environ� InputWrapper� ErrorWrapper�check_iterator�IteratorWrapper)r r �environr$ �iterator)� application)r" r# r �lint_app� s zvalidator.<locals>.lint_appr )r, r- r )r, r r � s )c @ sX e Z d Z d d � Z d d � Z d d � Z d d � Z d d � Z d d � Z d S)r& c C s | | _ d S)N)�input)�self� wsgi_inputr r r �__init__� s zInputWrapper.__init__c G sB t t | � d k � | j j | � } t t | � t k � | S)Nr )r r r. �readr �bytes)r/ r �vr r r r2 � s zInputWrapper.readc G sB t t | � d k � | j j | � } t t | � t k � | S)Nr )r r r. �readliner r3 )r/ r r4 r r r r5 � s zInputWrapper.readlinec G si t t | � d k � | j j | � } t t | � t k � x$ | D] } t t | � t k � qE W| S)Nr )r r r. � readlinesr �listr3 )r/ r �lines�liner r r r6 � s zInputWrapper.readlinesc c s& x | j � } | s d S| Vq Wd S)N)r5 )r/ r9 r r r �__iter__� s zInputWrapper.__iter__c C s t d d � d S)Nr z input.close() must not be called)r )r/ r r r �close� s zInputWrapper.closeN) r r r r1 r2 r5 r6 r: r; r r r r r& � s r& c @ sL e Z d Z d d � Z d d � Z d d � Z d d � Z d d � Z d S) r' c C s | | _ d S)N)�errors)r/ � wsgi_errorsr r r r1 � s zErrorWrapper.__init__c C s* t t | � t k � | j j | � d S)N)r r r r< �write)r/ �sr r r r> � s zErrorWrapper.writec C s | j j � d S)N)r< �flush)r/ r r r r@ � s zErrorWrapper.flushc C s" x | D] } | j | � q Wd S)N)r> )r/ �seqr9 r r r � writelines� s zErrorWrapper.writelinesc C s t d d � d S)Nr z!errors.close() must not be called)r )r/ r r r r; � s zErrorWrapper.closeN)r r r r1 r> r@ rB r; r r r r r' � s r' c @ s( e Z d Z d d � Z d d � Z d S)r c C s | | _ d S)N)�writer)r/ Z wsgi_writerr r r r1 � s zWriteWrapper.__init__c C s' t t | � t k � | j | � d S)N)r r r3 rC )r/ r? r r r �__call__� s zWriteWrapper.__call__N)r r r r1 rD r r r r r � s r c @ s( e Z d Z d d � Z d d � Z d S)�PartialIteratorWrapperc C s | | _ d S)N)r+ )r/ � wsgi_iteratorr r r r1 s z PartialIteratorWrapper.__init__c C s t | j d � S)N)r) r+ )r/ r r r r: s z PartialIteratorWrapper.__iter__N)r r r r1 r: r r r r rE � s rE c @ sL e Z d Z d d � Z d d � Z d d � Z d d � Z d d � Z d S) r) c C s. | | _ t | � | _ d | _ | | _ d S)NF)�original_iterator�iterr+ �closed�check_start_response)r/ rF rJ r r r r1 s zIteratorWrapper.__init__c C s | S)Nr )r/ r r r r: s zIteratorWrapper.__iter__c C sr t | j d � t | j � } t | � t k rF t d d | f � | j d k rn t | j d � d | _ | S)NzIterator read after closedFz$Iterator yielded non-bytestring (%r)zjThe application returns and we started iterating over its body, but start_response has not yet been called)r rI �nextr+ r r3 rJ )r/ r4 r r r �__next__ s zIteratorWrapper.__next__c C s, d | _ t | j d � r( | j j � d S)NTr; )rI �hasattrrG r; )r/ r r r r; s zIteratorWrapper.closec C s- | j s t j j d � t | j d � d S)Nz/Iterator garbage collected without being closed)rI �sys�stderrr> r )r/ r r r �__del__# s zIteratorWrapper.__del__N)r r r r1 r: rL r; rP r r r r r) s r) c C s� t t | � t k d t | � | f � xC d d d d d d d d d g D] } t | | k d | f � qK Wx; d d g D]- } t | | k d | | d d � f � q| Wd | k r� t j d t � x[ | j � D]M } d | k r� q� t t | | � t k d | t | | � | | f � q� Wt t | d � t k d | d f � t | d d, k d | d � t | d � t | d � | d d- k r�t j d! | d t � t | j d" � p�| d" j d# � d$ | d" � t | j d% � p| d% j d# � d& | d% � | j d' � rJt t | d' � d( k d) | d' � | j d" � slt d% | k d* � t | j d" � d# k d+ � d S).Nz:Environment is not of the right type: %r (environment: %r)ZREQUEST_METHODZ SERVER_NAMEZ SERVER_PORTz wsgi.versionz wsgi.inputz wsgi.errorszwsgi.multithreadzwsgi.multiprocessz wsgi.run_oncez$Environment missing required key: %rZHTTP_CONTENT_TYPEZHTTP_CONTENT_LENGTHz8Environment should not have the key: %s (use %s instead)� Z QUERY_STRINGz�QUERY_STRING is not in the WSGI environment; the cgi module will use sys.argv when this variable is missing, so application errors are more likely�.z9Environmental variable %s is not a string: %r (value: %r)z#wsgi.version should be a tuple (%r)zwsgi.url_scheme�http�httpszwsgi.url_scheme unknown: %r�GET�HEAD�POST�OPTIONS�PATCH�PUT�DELETE�TRACEzUnknown REQUEST_METHOD: %rZ SCRIPT_NAME�/z$SCRIPT_NAME doesn't start with /: %rZ PATH_INFOz"PATH_INFO doesn't start with /: %rZCONTENT_LENGTHr zInvalid CONTENT_LENGTH: %rzgOne of SCRIPT_NAME or PATH_INFO are required (PATH_INFO should at least be '/' if SCRIPT_NAME is empty)zOSCRIPT_NAME cannot be '/'; it should instead be '', and PATH_INFO should be '/')rS rT )rU rV rW rX rY rZ r[ r\ )r r �dict�warnings�warnr �keysr �tuple� check_input� check_errors�get� startswith�int)r* �keyr r r r% * s` # r% c C sA x: d d d d g D]& } t t | | � d | | f � q Wd S)Nr2 r5 r6 r: z-wsgi.input (%r) doesn't have the attribute %s)r rM )r0 �attrr r r rc k s rc c C s> x7 d d d g D]& } t t | | � d | | f � q Wd S)Nr@ r> rB z.wsgi.errors (%r) doesn't have the attribute %s)r rM )r= ri r r r rd q s rd c C s� t | d � } | j d d � d } t t | � d k d | � t | � } t | d k d | � t | � d k s� | d d k r� t j d | t � d S) N�Statusr r r z)Status codes must be three characters: %r�d zStatus code is invalid: %r� � zjThe status string (%r) should be a three-digit integer followed by a single space and a status explanation)r �splitr r rg r_ r` r )r Z status_codeZ status_intr r r r w s "r c C sz t t | � t k d | t | � f � i } xD| D]<} t t | � t k d | t | � f � t t | � d k � | \ } } t | d � } t | d � } t | j � d k d | � d | | j � <t d | k o� d | k d | � t t j | � d | � t | j d � o/| j d � d | � t j | � r6 t d d | t j | � j d � f � q6 Wd S)Nz%Headers (%r) must be of type list: %rz1Individual headers (%r) must be of type tuple: %rr z Header namez Header valuer zyThe Status header cannot be used; it conflicts with CGI script, and HTTP status is not given through headers (value: %r).� �:z,Header names may not contain ':' or '\n': %rzBad header name: %r�-�_z#Names may not end in '-' or '_': %rr z#Bad header value: %r (bad char: %r)) r r r7 rb r r �lower� header_re�search�endswith�bad_header_value_re�group)r Z header_names�item�namer r r r r � s0 r c C s� t | d � } t | j d d � d � } d } xV | D]N \ } } t | d � } | j � d k r8 | | k ru d St d d | � q8 W| | k r� t d d | � d S) Nrj r r �� �0 z Header namez content-typezJContent-Type header found in a %s response, which must not return content.z,No Content-Type header found in headers (%s))r{ r| )r rg rn rs r )r r �codeZNO_MESSAGE_BODYrz r r r r r � s r c C s9 t | d k p t | � t k d | t | � f � d S)Nz exc_info (%r) is not a tuple: %r)r r rb )r! r r r r � s r c C s! t t | t t f � d � d S)NzwYou should not return a string as your application iterator, instead return a single-item list containing a bytestring.)r � isinstancer r3 )r+ r r r r( � s r( )r �__all__�rerN r_ �compilert rw �Warningr r r r r& r' r rE r) r% rc rd r r r r r( r r r r �<module>n s. 7# # A