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a k�h�@ � @ s� d Z ddlmZ ddlmZ ddlmZ ddlmZ ddl m Z ddl m Z m Z mZmZmZmZmZmZmZmZmZmZ ddlmZmZ dd lm Z dd l m Z dd l m Z m!Z!m"Z"m#Z#m$Z$m%Z% dd l&m'Z'm(Z(m)Z) dd l*m+Z+m,Z, ed�Z-e Z.ee/e0e$e e"e#ee.df ee. ee.ddf e!ee. eee. e1e.f e+f Z2ee/e0f e/d�dd�Z3ee/e0f e/d�dd�Z4e e/ge1f e e/gdf d�dd�Z5ee/e0f e/d�dd�Z6ee/e0f e/d�dd �Z7d.e0eeee0e2f ee2 e2d �d d �Z8ee- ee- d �d!d"�Z9ee, e2e e/ge1f eeee0e2f ee+ e ee/e0f ge/f eeeee2 f ddf d#�d$d%�Z:ee, e2e e/ge1f dd&�d'd(�Z;ee, e2e e/ge1f ed d&�d)d*�Z<ee, e2ee/ d+�d,d-�Z=dS )/zu Context-free flattener/serializer for rendering Python objects, possibly complex or arbitrarily nested, as strings. � )� iscoroutine)�BytesIO)�exc_info)� extract_tb)� GeneratorType) �Any�Callable� Coroutine� Generator�List�Mapping�Optional�Sequence�Tuple�TypeVar�Union�cast)�Deferred�ensureDeferred)� nativeString)�Failure)�CDATA�CharRef�Comment�Tag�slot� voidElements)�FlattenerError� UnfilledSlot�UnsupportedType)� IRenderable�IRequest�T.N��data�returnc C s4 t | t�r| �d�} | �dd��dd��dd�} | S )a� Escape some character or UTF-8 byte data for inclusion in an HTML or XML document, by replacing metacharacters (C{&<>}) with their entity equivalents (C{&<>}). This is used as an input to L{_flattenElement}'s C{dataEscaper} parameter. @param data: The string to escape. @return: The quoted form of C{data}. If C{data} is L{str}, return a utf-8 encoded string. �utf-8� &s &� <s <� >� >�� isinstance�str�encode�replace�r$ � r1 ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/twisted/web/_flatten.py�escapeForContentC s r3 c C s t | t�r| �d�S | S )aG Escape some character or UTF-8 byte data for inclusion in the top level of an attribute. L{attributeEscapingDoneOutside} actually passes the data through unchanged, because L{writeWithAttributeEscaping} handles the quoting of the text within attributes outside the generator returned by L{_flattenElement}; this is used as the C{dataEscaper} argument to that L{_flattenElement} call so that that generator does not redundantly escape its text output. @param data: The string to escape. @return: The string, unchanged, except for encoding. r& )r, r- r. r0 r1 r1 r2 � attributeEscapingDoneOutsideV s r4 )�writer% c s t dd�� fdd� }|S )aU Decorate a C{write} callable so that all output written is properly quoted for inclusion within an XML attribute value. If a L{Tag <twisted.web.template.Tag>} C{x} is flattened within the context of the contents of another L{Tag <twisted.web.template.Tag>} C{y}, the metacharacters (C{<>&"}) delimiting C{x} should be passed through unchanged, but the textual content of C{x} should still be quoted, as usual. For example: C{<y><x>&</x></y>}. That is the default behavior of L{_flattenElement} when L{escapeForContent} is passed as the C{dataEscaper}. However, when a L{Tag <twisted.web.template.Tag>} C{x} is flattened within the context of an I{attribute} of another L{Tag <twisted.web.template.Tag>} C{y}, then the metacharacters delimiting C{x} should be quoted so that it can be parsed from the attribute's value. In the DOM itself, this is not a valid thing to do, but given that renderers and slots may be freely moved around in a L{twisted.web.template} template, it is a condition which may arise in a document and must be handled in a way which produces valid output. So, for example, you should be able to get C{<y attr="<x />" />}. This should also be true for other XML/HTML meta-constructs such as comments and CDATA, so if you were to serialize a L{comment <twisted.web.template.Comment>} in an attribute you should get C{<y attr="<-- comment -->" />}. Therefore in order to capture these meta-characters, flattening is done with C{write} callable that is wrapped with L{writeWithAttributeEscaping}. The final case, and hopefully the much more common one as compared to serializing L{Tag <twisted.web.template.Tag>} and arbitrary L{IRenderable} objects within an attribute, is to serialize a simple string, and those should be passed through for L{writeWithAttributeEscaping} to quote without applying a second, redundant level of quoting. @param write: A callable which will be invoked with the escaped L{bytes}. @return: A callable that writes data with escaping. Nr# c s � t | ��dd�� d S )N� "s ")r3 r/ r0 �r5 r1 r2 �_write� s z*writeWithAttributeEscaping.<locals>._write)�bytes)r5 r8 r1 r7 r2 �writeWithAttributeEscapingi s )r: c C s t | t�r| �d�} | �dd�S )z� Escape CDATA for inclusion in a document. @param data: The string to escape. @return: The quoted form of C{data}. If C{data} is unicode, return a utf-8 encoded string. r& � ]]>s ]]]]><![CDATA[>r+ r0 r1 r1 r2 � escapedCDATA� s r< c C sH t | t�r| �d�} | �dd��dd�} | rD| dd� dkrD| d 7 } | S ) z� Escape a comment for inclusion in a document. @param data: The string to escape. @return: The quoted form of C{data}. If C{data} is unicode, return a utf-8 encoded string. r& s --s - - r) r* ���N� -� r+ r0 r1 r1 r2 �escapedComment� s r@ )�name�slotData�defaultr% c C sH |ddd� D ] }|dur| |v r|| S q|dur<|S t | ��dS )zK Find the value of the named slot in the given stack of slot data. Nr= )r )rA rB rC Z slotFramer1 r1 r2 � _getSlotValue� s rD )�dr% c sH t � fdd���ttd��fdd� }ttd��fdd� }� �||� �S ) z� Create a new L{Deferred} based on C{d} that will fire and fail with C{d}'s result or error, but will not modify C{d}'s callback type. c s � � � S �N)�cancel��_)rE r1 r2 �<lambda>� � z_fork.<locals>.<lambda>��resultr% c s � � | � | S rF )�callback�rM ��d2r1 r2 rN � s z_fork.<locals>.callback)�failurer% c s � � | � | S rF )�errback)rR rP r1 r2 rS � s z_fork.<locals>.errback)r r" r Z addCallbacks)rE rN rS r1 )rE rQ r2 �_fork� s rT )�request�rootr5 rB � renderFactory� dataEscaperr% c # sL |||ft ttttf gtf tt ttgtf tttt t f ddf d���fdd� � t t t t d�� fdd� }t |ttf�r�|||�� �n�t |t �r�t |j �|j�}� |�V �n�t |t�r�|d� |t|j�� |d � �n`t |t��r|d � |t|j�� |d � �n2t |t��r|��|j� |j}|du�r�|du �rXtd |� d ���|�d�} d| _|�|�} | �| �} � | �V ��� dS |j �s�� |j �V dS |d� t |j t��r�|j � d�} n|j } || � |j � � D ]L\} }t | t��r| � d�} |d| d � � |t!t"|�d�V |d� �q�|j �sJt#| �t$v�rr|d� � |j t%�V |d| d � n|d� n�t |t&t't(f��r�|D ]}� |�V �q�n�t |t)��r�d|j*f }||� d�� nzt |t ��r�|t+|��V n^t,|��r|t �-t.t/t t tt f |���V n.t�0|��r@|���} � | |d�V nt1|��dS )at Make C{root} slightly more flat by yielding all its immediate contents as strings, deferreds or generators that are recursive calls to itself. @param request: A request object which will be passed to L{IRenderable.render}. @param root: An object to be made flatter. This may be of type C{unicode}, L{str}, L{slot}, L{Tag <twisted.web.template.Tag>}, L{tuple}, L{list}, L{types.GeneratorType}, L{Deferred}, or an object that implements L{IRenderable}. @param write: A callable which will be invoked with each L{bytes} produced by flattening C{root}. @param slotData: A L{list} of L{dict} mapping L{str} slot names to data with which those slots will be replaced. @param renderFactory: If not L{None}, an object that provides L{IRenderable}. @param dataEscaper: A 1-argument callable which takes L{bytes} or L{unicode} and returns L{bytes}, quoted as appropriate for the rendering context. This is really only one of two values: L{attributeEscapingDoneOutside} or L{escapeForContent}, depending on whether the rendering context is within an attribute or not. See the explanation in L{writeWithAttributeEscaping}. @return: An iterator that eventually writes L{bytes} to C{write}. It can yield other iterators or L{Deferred}s; if it yields another iterator, the caller will iterate it; if it yields a L{Deferred}, the result of that L{Deferred} will be another generator, in which case it is iterated. See L{_flattenTree} for the trampoline that consumes said values. N)�newRootrX rW r5 r% c s t � | |�||�S rF )�_flattenElement)rY rX rW r5 )rU rB r1 r2 � keepGoing s �z"_flattenElement.<locals>.keepGoingrL c s | � � �S rF )� addCallbackrO )r[ r1 r2 �keepGoingAsync s z'_flattenElement.<locals>.keepGoingAsyncs <![CDATA[r; s <!--s -->z$Tag wants to be rendered by method "z)" but is not contained in any IRenderableFr( �asciir? s ="r7 r6 r) s </s />z&#%d;)rW )2� Flattenabler r r9 r- r r �objectr r r, r rD rA rC r r< r$ r r@ r �appendrB �render� ValueError�cloneZlookupRenderMethod�pop�tagName�childrenr. � attributes�itemsr4 r: r r r3 �tuple�listr r ZordinalrT r Z fromCoroutiner r Z providedByr )rU rV r5 rB rW rX r] Z slotValueZ rendererNameZ rootCloneZ renderMethodrM rf �k�v�element�escapedr1 )r[ rU rB r2 rZ � s� 1� � � � �� rZ )rU rV r5 r% c � s� t | ||g dt�g}|r�z.|d j}t|d �}t|t�rD|I dH }W n� ty` |�� Y q ty� } zZ|�� g }|D ]}|� |jj d � q~|� |j d � t ||t t � d ���W Y d}~qd}~0 0 |� |� qdS )a� Make C{root} into an iterable of L{bytes} and L{Deferred} by doing a depth first traversal of the tree. @param request: A request object which will be passed to L{IRenderable.render}. @param root: An object to be made flatter. This may be of type C{unicode}, L{bytes}, L{slot}, L{Tag <twisted.web.template.Tag>}, L{tuple}, L{list}, L{types.GeneratorType}, L{Deferred}, or something providing L{IRenderable}. @param write: A callable which will be invoked with each L{bytes} produced by flattening C{root}. @return: A C{Deferred}-returning coroutine that resolves to C{None}. Nr= rV � )rZ r3 �gi_frame�nextr, r � StopIterationre � Exceptionra �f_localsr r r ) rU rV r5 �stack�framern �e�roots� generatorr1 r1 r2 � _flattenTreel s$ � ,r{ c C s t t| ||��S )a Incrementally write out a string representation of C{root} using C{write}. In order to create a string representation, C{root} will be decomposed into simpler objects which will themselves be decomposed and so on until strings or objects which can easily be converted to strings are encountered. @param request: A request object which will be passed to the C{render} method of any L{IRenderable} provider which is encountered. @param root: An object to be made flatter. This may be of type L{str}, L{bytes}, L{slot}, L{Tag <twisted.web.template.Tag>}, L{tuple}, L{list}, L{types.GeneratorType}, L{Deferred}, or something that provides L{IRenderable}. @param write: A callable which will be invoked with each L{bytes} produced by flattening C{root}. @return: A L{Deferred} which will be called back with C{None} when C{root} has been completely flattened into C{write} or which will be errbacked if an unexpected exception occurs. )r r{ )rU rV r5 r1 r1 r2 �flatten� s r| )rU rV r% c s4 t � � t| |� j�}|�� fdd�� ttt |�S )a� Collate a string representation of C{root} into a single string. This is basically gluing L{flatten} to an L{io.BytesIO} and returning the results. See L{flatten} for the exact meanings of C{request} and C{root}. @return: A L{Deferred} which will be called back with a single UTF-8 encoded string as its result when C{root} has been completely flattened or which will be errbacked if an unexpected exception occurs. c s � � � S rF )�getvaluerH ��ior1 r2 rJ � rK z flattenString.<locals>.<lambda>)r r| r5 r\ r r r9 )rU rV rE r1 r~ r2 � flattenString� s r� )N)>�__doc__�inspectr r r �sysr � tracebackr �typesr �typingr r r r r r r r r r r r Ztwisted.internet.deferr r Ztwisted.python.compatr Ztwisted.python.failurer Ztwisted.web._stanr r r r r r Ztwisted.web.errorr r r Ztwisted.web.iwebr r! r" ZFlattenableRecursiver9 r- r` r_ r3 r4 r: r< r@ rD rT rZ r{ r| r� r1 r1 r1 r2 �<module> sz 8 �� � / �� � � +�
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