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It also warns on some common HTTP errors such as non-empty responses for 304 status codes. .. autoclass:: LintMiddleware :copyright: 2007 Pallets :license: BSD-3-Clause � N)� TracebackType)�urlparse)�warn� )�Headers)�is_entity_header)� FileWrapper)� StartResponse)�WSGIApplication)�WSGIEnvironmentc @ s e Zd ZdZdS )� WSGIWarningz Warning class for WSGI warnings.N��__name__� __module__� __qualname__�__doc__� r r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/werkzeug/middleware/lint.pyr s r c @ s e Zd ZdZdS )� HTTPWarningz Warning class for HTTP warnings.Nr r r r r r " s r )�context�obj�need�returnc C s8 t |�|ur4t| �d|j�dt |�j�d�tdd� d S )Nz requires z, got �.� �� stacklevel)�typer r r )r r r r r r � check_type& s �r c @ sh e Zd Zeje dd�dd�Zejed�dd�Zejed�dd �Z ej e d �d d �Z dd �d d�Z dS )� InputStreamN��streamr c C s || _ d S �N��_stream��selfr! r r r �__init__0 s zInputStream.__init__)�argsr c G sB t |�dkr tdtdd� nt |�dkr6tdtdd� | jj|� S )Nr z�WSGI does not guarantee an EOF marker on the input stream, thus making calls to 'wsgi.input.read()' unsafe. 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D s � �zInputStream.readline�r c C s: z t | j�W S ty4 tdtdd� t d� Y S 0 d S )Nz 'wsgi.input' is not iterable.r r r )�iterr$ r- r r �r& r r r �__iter__W s zInputStream.__iter__c C s t dtdd� | j�� d S )Nz(The application closed the input stream!r r �r r r$ �closer1 r r r r4 ^ s zInputStream.close) r r r �t�IO�bytesr' �Anyr+ r. �Iteratorr2 r4 r r r r r / s r c @ sd e Zd Zeje dd�dd�Zedd�dd�Zdd�d d �Zej e dd �d d �Z dd�dd�Z dS )� ErrorStreamNr c C s || _ d S r" r# r% r r r r' d s zErrorStream.__init__��sr c C s t d|t� | j�|� d S )Nzwsgi.error.write())r �strr$ �write�r& r< r r r r> g s zErrorStream.writer/ c C s | j �� d S r" )r$ �flushr1 r r r r@ k s zErrorStream.flush)�seqr c C s |D ]}| � |� qd S r" )r> )r& rA �liner r r � writelinesn s zErrorStream.writelinesc C s t dtdd� | j�� d S )Nz(The application closed the error stream!r r r3 r1 r r r r4 r s zErrorStream.close) r r r r5 r6 r= r' r> r@ �IterablerC r4 r r r r r: c s r: c @ s@ e Zd Zejegdf eje dd�dd�Zedd�dd�Z dS )� GuardedWriteN)r> �chunksr c C s || _ || _d S r" )�_write�_chunks)r& r> rF r r r r' x s zGuardedWrite.__init__r; c C s* t d|t� | �|� | j�t|�� d S )Nzwrite())r r7 rG rH �appendr* r? r r r �__call__| s zGuardedWrite.__call__) r r r r5 �Callabler7 �List�intr' rJ r r r r rE w s $rE c @ sn e Zd Zeje ejeef ej e dd�dd�Z d d�dd�Z ed�dd �Z dd�d d �Z dd�d d �ZdS )�GuardedIteratorN)�iterator� headers_setrF r c C s( || _ t|�j| _d| _|| _|| _d S )NF)� _iteratorr0 �__next__�_next�closedrP rF )r& rO rP rF r r r r' � s zGuardedIterator.__init__r/ c C s | S r" r r1 r r r r2 � s zGuardedIterator.__iter__c C sP | j rtdtdd� | �� }| js0tdtdd� td|t� | j�t |�� |S )Nz Iterated over closed 'app_iter'.r r z8The application returned before it started the response.zapplication iterator items) rT r r rS rP r r7 rF rI r* )r& �rvr r r rR � s � zGuardedIterator.__next__c C s� d| _ t| jd�r | j�� | jr�| j\}}t| j�}|jdtd�}|dkr�|D ]2\}}|� � }|dvrPt |�rPt d|�d�t � qP|r�t d t � nfd | kr�d k s�n |d kr�|d kr�t |� d�t � |r�t |� d�t � n|d ur�||kr�t dt � d S )NTr4 zcontent-length)r i0 )�expireszcontent-locationzEntity header z found in 304 response.z#304 responses must not have a body.�d �� �� r z- responses must have an empty content length.z responses must not have a body.zGContent-Length and the number of bytes sent to the client do not match.)rT �hasattrrQ r4 rP �sumrF �getrM �lowerr r r r )r& � status_code�headersZ bytes_sent�content_length�key�_valuer r r r4 � s> � � ��zGuardedIterator.closec C s, | j s(ztdt� W n ty& Y n0 d S )Nz4Iterator was garbage collected before it was closed.)rT r r � Exceptionr1 r r r �__del__� s � zGuardedIterator.__del__)r r r r5 rD r7 �TuplerM r rL r' r2 rR r4 rd r r r r rN � s � %rN c @ s� e Zd ZdZddd�dd�Zddd�d d �Zeejej eef ej ej ej e e e f ej eef d �d d �Zedd�dd�Zeje dd�dd�Zejejeje d�dd�ZdS )�LintMiddlewarea� Warns about common errors in the WSGI and HTTP behavior of the server and wrapped application. Some of the issues it checks are: - invalid status codes - non-bytes sent to the WSGI server - strings returned from the WSGI application - non-empty conditional responses - unquoted etags - relative URLs in the Location header - unsafe calls to wsgi.input - unclosed iterators Error information is emitted using the :mod:`warnings` module. :param app: The WSGI application to wrap. .. code-block:: python from werkzeug.middleware.lint import LintMiddleware app = LintMiddleware(app) r N)�appr c C s || _ d S r" )rg )r& rg r r r r' � s zLintMiddleware.__init__r )�environr c C s� t |�turtdtdd� dD ]"}||vr td|�d�tdd� q |d d kr\td tdd� |�d d �}|�d d �}|r�|d dkr�td|��tdd� |r�|d dkr�td|��tdd� d S )Nz/WSGI environment is not a standard Python dict.� r ) �REQUEST_METHODZ SERVER_NAMEZ SERVER_PORT� wsgi.version� wsgi.input� wsgi.errorszwsgi.multithreadzwsgi.multiprocessz wsgi.run_oncezRequired environment key z not foundr rk )r) r z"Environ is not a WSGI 1.0 environ.Z SCRIPT_NAME� Z PATH_INFOr �/z+'SCRIPT_NAME' does not start with a slash: z)'PATH_INFO' does not start with a slash: )r �dictr r r\ )r& rh ra � script_nameZ path_infor r r � check_environ� s: � � ��z LintMiddleware.check_environ)�statusr_ �exc_infor c C s\ t d|t� |�d d�d }t|�dks0|�� s>tdtdd� t|�dk sV|d dkrltd |�d �tdd� t|�}|d k r�td tdd� t|�t ur�td tdd� |D ]t}t|�t us�t|�dkr�tdtdd� |\}}t|�tus�t|�tu�rtdtdd� |� � dkr�tdtdd� q�|d u�rBt |t ��sBtdtdd� t |�}| �|� ||fS )Nrs r) r r z!Status code must be three digits.r ri � zInvalid value for status zJ. Valid status strings are three digits, a space and a status explanation.rW zStatus code < 100 detected.zHeader list is not a list.r z#Header items must be 2-item tuples.z'Header keys and values must be strings.zFThe status header is not supported due to conflicts with the CGI spec.zInvalid value for exc_info.)r r= �splitr* �isdigitr r rM r �list�tupler] � isinstancer � check_headers) r& rs r_ rt Zstatus_code_strr^ �item�name�valuer r r �check_start_response sD � � � z#LintMiddleware.check_start_response)r_ r c C s� |� d�}|d urt|�d�r@|�d�r4tdtdd� |dd � }|d d� |d d � krdd kstn td tdd� |� d �}|d ur�t|�js�td tdd� d S )N�etag)zW/�w/r� z)Weak etag indicator should be upper case.ri r r r) ����"zUnquoted etag emitted.�locationz+Absolute URLs required for location header.)r\ � startswithr r r �netloc)r& r_ r� r� r r r r{ N s( � & �z LintMiddleware.check_headers)�app_iterr c C s t |t�rtdtdd� d S )Nz�The application returned a bytestring. The response will send one character at a time to the client, which will kill performance. Return a list or iterable instead.r r )rz r7 r r )r& r� r r r �check_iteratori s �z LintMiddleware.check_iterator�r( �kwargsr c s� t |�dkrtdtdd� |r,tdtdd� |d }|d ���|� t|d �|d< t|d �|d< t|d < g �g � tjtjtj t gd f d �� ���fd d � }�� |t� d |��}�� |� t|t� tjttf ��� �S )Nr z A WSGI app takes two arguments.r z+A WSGI app does not take keyword arguments.r r) rl rm zwsgi.file_wrapperr� c s� t | �dvr&tdt | �� d�tdd� |r4tdt� | d }| d }t | �d krX| d nd }��|||��d d �< t�|||�� �S ) N> r r z Invalid number of arguments: z, expected 2 or 3.r r z1'start_response' does not take keyword arguments.r r) r )r* r r r rE )r( r� rs r_ rt �rF rP r& Zstart_responser r �checking_start_response� s � �z8LintMiddleware.__call__.<locals>.checking_start_responser )r* r r rr r r: r r5 r8 rK r7 rg �castr� rN re rM r )r& r( r� rh r� r� r r� r rJ s s, � � �zLintMiddleware.__call__)r r r r r' rr r= r5 rL re �Optional�Type� BaseExceptionr rM r r r{ rD r7 r� r8 rJ r r r r rf � s .� � 6 rf ) r �typingr5 �typesr � urllib.parser �warningsr Zdatastructuresr �httpr Zwsgir � TYPE_CHECKINGZ_typeshed.wsgir r r �Warningr r r= �objectr� r r r: rE rN rf r r r r �<module> s& 4 P
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