B hAZ1@sdZyddlmZWn ek r4ddlmZYnXddlmZddlmZddlm Z ddl m Z ddl m Z Gdd d eZGd d d eZdd dZGdddeZGdddeZGdddeZGdddeZGdddeZdS)a werkzeug.contrib.lint ~~~~~~~~~~~~~~~~~~~~~ .. versionadded:: 0.5 This module provides a middleware that performs sanity checks of the WSGI application. It checks that :pep:`333` is properly implemented and warns on some common HTTP errors such as non-empty responses for 304 status codes. This module provides a middleware, the :class:`LintMiddleware`. Wrap your application with it and it will warn about common problems with WSGI and HTTP while your application is running. It's strongly recommended to use it during development. :copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details. :license: BSD, see LICENSE for more details. )urlparse)warn)Headers)is_entity_header) FileWrapper) string_typesc@seZdZdZdS) WSGIWarningz Warning class for WSGI warnings.N)__name__ __module__ __qualname____doc__r r 4lib/python3.7/site-packages/werkzeug/contrib/lint.pyr#src@seZdZdZdS) HTTPWarningz Warning class for HTTP warnings.N)r r r r r r r rr(srcCs(t|tk r$ttd||jjfdS)Nz%s requires bytestrings, got %s)typestrrr __class__r )contextobj stacklevelr r r check_string-s rc@s4eZdZddZddZddZddZd d Zd S) InputStreamcCs ||_dS)N)_stream)selfstreamr r r__init__5szInputStream.__init__cGsFt|dkrttdddnt|dkr:ttddd|jj|S)Nrzwsgi does not guarantee an EOF marker on the input stream, thus making calls to wsgi.input.read() unsafe. Conforming servers may never return from this call.)rz/too many parameters passed to wsgi.input.read())lenrrrread)rargsr r rr 8s   zInputStream.readcGsPt|dkrttdddn&t|dkrttdddt|dksV|ddkrfttd ddt|}|d krttd ddt|tk rttd ddx|D]z}t|t k st|d krttddd|\}}t|t k st|t k rttddd| dkrttdddqW|dk rLt |t sLttdddt |}||||fS)Nstatusrrrz Status code must be three digits)rrL zeInvalid value for status %r. Valid status strings are three digits, a space and a status explanationr<zstatus code < 100 detectedzheader list is not a listrz Headers must tuple 2-item tupleszheader items must be stringszFThe status header is not supported due to conflicts with the CGI spec.zinvalid value for exc_info)rsplitrisdigitrrrBrlisttuplerrC isinstancer check_headers)rrSrEexc_inforDitemnamerGr r rcheck_start_responses8      z#LintMiddleware.check_start_responsecCs|d}|dk rx|drB|dr6ttddd|dd}|dd|d dkrfd ksxnttd dd|d }|dk rt|jsttd dddS)Netag)zW/zw/zw/z%weak etag indicator should be upcase.rL)rrr"zunquoted etag emitted.locationz*absolute URLs required for location header)rA startswithrrrZnetloc)rrEr_rbr r rrZs    &  zLintMiddleware.check_headerscCst|trttddddS)Nzapplication returned string. Response will send character for character to the client which will kill the performance. Return a list or iterable instead.r)r)rYrrr)rapp_iterr r rcheck_iterator)s zLintMiddleware.check_iteratorcst|dkrttddd|r0ttddd|\}|t|d|d<t|d|d<t|d<ggfdd }||}|t |S) Nrz"Two arguments to WSGI app required)rz(No keyword arguments to WSGI app allowedz wsgi.inputz wsgi.errorszwsgi.file_wrappercst|dkr$ttdt|dd|r4ttd|dd\}}t|dkrZ|d}nd}|||dd<t|||S)N)rrz0Invalid number of arguments: %s, expected 2 or 3r)rzno keyword arguments allowed.r)rrrr^r.)r!kwargsrSrEr[)r1r9rstart_responser rchecking_start_responseCs     z8LintMiddleware.__call__..checking_start_response) rrrrRrr'rrKrer4)rr!rfrPrhrdr )r1r9rrgrr30s     zLintMiddleware.__call__N) r r r r rrRr^rZrer3r r r rrJs$rJN)r)r Z urllib.parser ImportErrorwarningsrZwerkzeug.datastructuresrZ werkzeug.httprZ werkzeug.wsgirZwerkzeug._compatrWarningrrrobjectrr'r.r4rJr r r rs"      , ?