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parsers.cpython-310.pyc
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o <&�aX� � @ sz d Z ddlZddlZddlZddlZddlmZmZmZ ddl m Z m Z ddl m Z mZmZmZ e�e�Ze ZG dd� de�Zdd � Zd d � ZG d d � d e�ZG dd� de�ZG dd� de�Z G dd� de �Z G dd� de �Z G dd� de�Z G dd� de�Z G dd� de e �Z!G d d � d e e �Z"G d d � d e �Z#G d d!� d!e�Z$G d"d#� d#e$e �Z%G d$d%� d%e$e �Z&e e e#e%e&d&�Z'dS )'a� Response parsers for the various protocol types. The module contains classes that can take an HTTP response, and given an output shape, parse the response into a dict according to the rules in the output shape. There are many similarities amongst the different protocols with regard to response parsing, and the code is structured in a way to avoid code duplication when possible. The diagram below is a diagram showing the inheritance hierarchy of the response classes. :: +--------------+ |ResponseParser| +--------------+ ^ ^ ^ +--------------------+ | +-------------------+ | | | +----------+----------+ +------+-------+ +-------+------+ |BaseXMLResponseParser| |BaseRestParser| |BaseJSONParser| +---------------------+ +--------------+ +--------------+ ^ ^ ^ ^ ^ ^ | | | | | | | | | | | | | ++----------+-+ +-+-----------++ | | |RestXMLParser| |RestJSONParser| | +-----+-----+ +-------------+ +--------------+ +----+-----+ |QueryParser| |JSONParser| +-----------+ +----------+ The diagram above shows that there is a base class, ``ResponseParser`` that contains logic that is similar amongst all the different protocols (``query``, ``json``, ``rest-json``, ``rest-xml``). Amongst the various services there is shared logic that can be grouped several ways: * The ``query`` and ``rest-xml`` both have XML bodies that are parsed in the same way. * The ``json`` and ``rest-json`` protocols both have JSON bodies that are parsed in the same way. * The ``rest-json`` and ``rest-xml`` protocols have additional attributes besides body parameters that are parsed the same (headers, query string, status code). This is reflected in the class diagram above. The ``BaseXMLResponseParser`` and the BaseJSONParser contain logic for parsing the XML/JSON body, and the BaseRestParser contains logic for parsing out attributes that come from other parts of the HTTP response. Classes like the ``RestXMLParser`` inherit from the ``BaseXMLResponseParser`` to get the XML body parsing logic and the ``BaseRestParser`` to get the HTTP header/status code/query string parsing. Additionally, there are event stream parsers that are used by the other parsers to wrap streaming bodies that represent a stream of events. The BaseEventStreamParser extends from ResponseParser and defines the logic for parsing values from the headers and payload of a message from the underlying binary encoding protocol. Currently, event streams support parsing bodies encoded as JSON and XML through the following hierarchy. +--------------+ |ResponseParser| +--------------+ ^ ^ ^ +--------------------+ | +------------------+ | | | +----------+----------+ +----------+----------+ +-------+------+ |BaseXMLResponseParser| |BaseEventStreamParser| |BaseJSONParser| +---------------------+ +---------------------+ +--------------+ ^ ^ ^ ^ | | | | | | | | +-+----------------+-+ +-+-----------------+-+ |EventStreamXMLParser| |EventStreamJSONParser| +--------------------+ +---------------------+ Return Values ============= Each call to ``parse()`` returns a dict has this form:: Standard Response { "ResponseMetadata": {"RequestId": <requestid>} <response keys> } Error response { "ResponseMetadata": {"RequestId": <requestid>} "Error": { "Code": <string>, "Message": <string>, "Type": <string>, <additional keys> } } � N)�six�ETree� XMLParseError)� EventStream�NoInitialResponseError)�parse_timestamp� merge_dicts�is_json_value_header�lowercase_dictc @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�ResponseParserFactoryc C s i | _ d S �N)� _defaults)�self� r �2/usr/lib/python3/dist-packages/botocore/parsers.py�__init__� � z ResponseParserFactory.__init__c K s | j �|� dS )aO Set default arguments when a parser instance is created. You can specify any kwargs that are allowed by a ResponseParser class. There are currently two arguments: * timestamp_parser - A callable that can parse a timestamp string * blob_parser - A callable that can parse a blob type N)r �update)r �kwargsr r r �set_parser_defaults� s z)ResponseParserFactory.set_parser_defaultsc C s t | }|di | j��S )Nr )�PROTOCOL_PARSERSr )r � protocol_name� parser_clsr r r � create_parser� s z#ResponseParserFactory.create_parserN)�__name__� __module__� __qualname__r r r r r r r r � s r c C s t � �| �S r )r r )�protocolr r r r � � r c s � fdd�}|S )Nc s. t |d�r|j}|d u rd}n|}� | ||�S )N�text� )�hasattrr )r �shape�node_or_stringr ��funcr r �_get_text_content� s � z(_text_content.<locals>._get_text_contentr )r% r& r r$ r � _text_content� s r' c @ s e Zd ZdS )�ResponseParserErrorN)r r r r r r r r( � s r( c @ s� e Zd ZdZdZdZd$dd�Zdd� Zdd � Zd d � Z d d � Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd d!� Zd"d#� ZdS )%�ResponseParserao Base class for response parsing. This class represents the interface that all ResponseParsers for the various protocols must implement. This class will take an HTTP response and a model shape and parse the HTTP response into a dictionary. There is a single public method exposed: ``parse``. See the ``parse`` docstring for more info. zutf-8Nc C sL |d u rt }|| _|d u r| j}|| _d | _| jd ur$| �||�| _d S d S r )�DEFAULT_TIMESTAMP_PARSER�_timestamp_parser�_default_blob_parser� _blob_parser�_event_stream_parser�EVENT_STREAM_PARSER_CLS�r �timestamp_parser� blob_parserr r r r � s ��zResponseParser.__init__c C s t �|�S r )�base64� b64decode�r �valuer r r r, � s z#ResponseParser._default_blob_parserc C s� t �d|d � t �d|d � |d dkr5| �|�r!| �|�}n| �|�r.| �||�}|S | �||�}n| �||�}|rE|j� d�rE|S t |t �rd|� di �}|d |d < |d }t |�|d < ||d< |S ) a> Parse the HTTP response given a shape. :param response: The HTTP response dictionary. This is a dictionary that represents the HTTP request. The dictionary must have the following keys, ``body``, ``headers``, and ``status_code``. :param shape: The model shape describing the expected output. :return: Returns a dictionary representing the parsed response described by the model. In addition to the shape described from the model, each response will also have a ``ResponseMetadata`` which contains metadata about the response, which contains at least two keys containing ``RequestId`` and ``HTTPStatusCode``. Some responses may populate additional keys, but ``RequestId`` will always be present. zResponse headers: %s�headerszResponse body: %s�body� status_codei- � eventstream�ResponseMetadata�HTTPStatusCode� HTTPHeaders) �LOG�debug�_is_generic_error_response�_do_generic_error_parse�_is_modeled_error_shape�_do_modeled_error_parse�_do_error_parse� _do_parse� serialization�get� isinstance�dictr )r �responser" �parsed�response_metadatar7 r r r �parse� s& zResponseParser.parsec C s |d uo |j �dd�S )N� exceptionF)�metadatarG )r r" r r r rB s z&ResponseParser._is_modeled_error_shapec C sD |d dkr d|vs|d d u rdS |d � � }|�d�p | S d S )Nr9 i� r8 Ts <html>)�strip� startswith)r rJ r8 r r r r@ s �z)ResponseParser._is_generic_error_responsec C s4 t �d� t|d �tjjj�|d d�d�i d�S )NzlReceived a non protocol specific error response from the service, unable to populate error code and message.r9 r ��Code�Message��Errorr; )r> r? �strr �moves� http_client� responsesrG �r rJ r r r rA s ���z&ResponseParser._do_generic_error_parsec C � t d| jj ��)Nz %s._do_parse��NotImplementedError� __class__r �r rJ r" r r r rE * � zResponseParser._do_parsec C r\ )Nz%s._do_error_parser] r` r r r rD - � �z ResponseParser._do_error_parsec C r\ )Nz%s._do_modeled_error_parser] )r rJ r" rK r r r rC 1 rb z&ResponseParser._do_modeled_error_parsec C s t | d|j | j�}|||�S )Nz _handle_%s)�getattr� type_name�_default_handle)r r" �node�handlerr r r � _parse_shape5 s � zResponseParser._parse_shapec C s* g }|j }|D ] }|�| �||�� q|S r )�member�appendrh )r r" rf rK � member_shape�itemr r r � _handle_list: s zResponseParser._handle_listc C � |S r r �r r" r6 r r r re C s z ResponseParser._default_handlec C s& | j }|d �d�}t|d |||�S )N�context�operation_namer8 )r. rG r )r rJ r" �parser�namer r r �_create_event_streamF s z#ResponseParser._create_event_streamc C s t |�d S �Nr )�listr5 r r r �_get_first_keyK r z ResponseParser._get_first_keyc C sR |j r't|�dkrd}t||j ��| �|�}||jvr'd}t�|| � dS dS )N� zCInvalid service response: %s must have one and only one member set.zqReceived a tagged union response with member unknown to client: %s. Please upgrade SDK for full response support.TF)�is_tagged_union�lenr( rs rw �membersr> �info)r r" r6 � error_msg�tag�msgr r r � _has_unknown_tagged_union_memberN s � �z/ResponseParser._has_unknown_tagged_union_memberc C s dd|iiS )N�SDK_UNKNOWN_MEMBERrs r )r r~ r r r �#_handle_unknown_tagged_union_membera r z2ResponseParser._handle_unknown_tagged_union_member�NN)r r r �__doc__�DEFAULT_ENCODINGr/ r r, rM rB r@ rA rE rD rC rh rm re rt rw r� r� r r r r r) � s( 0 r) c s� e Zd Zd"� fdd� Zdd� Zdd� Z� fdd �Zd d � Zd d � Zdd� Z dd� Z dd� Z dd� Z e dd� �Ze dd� �Ze dd� �Ze d d � �Ze d d � �Ze d d!� �ZeZeZeZ� ZS )#�BaseXMLResponseParserNc s" t t| ��||� t�d�| _d S )Nz{.*})�superr� r �re�compile� _namespace_rer0 �r_ r r r f s �z BaseXMLResponseParser.__init__c C s� i }|j }|j}|j�d�pd}|j�d�pd}|j�d�r&t|t�s&|g}|D ]+}|D ]"} | �| �} | |kr>| �|| �} q,| |krI| �|| �} q,td| ��| || < q(|S )Nrs �keyr6 � flattenedzUnknown tag: %s) r� r6 rF rG rH rv � _node_tagrh r( ) r r" rf rK � key_shape� value_shape�key_location_name�value_location_name� keyval_node� single_pair�tag_name�key_name�val_namer r r � _handle_mapk s" z!BaseXMLResponseParser._handle_mapc C s | j �d|j�S �Nr )r� �subr~ )r rf r r r r� � ra z BaseXMLResponseParser._node_tagc s. |j �d�rt|t�s|g}tt| ��||�S )Nr� )rF rG rH rv r� r� rm )r r" rf r� r r rm � s z"BaseXMLResponseParser._handle_listc C s i }|j }|j�dd�r| �|�}| �|�}| �||�r&| �|�}| �|�S |D ]]}|| }d|jv s9|j�d�r:q(| � ||�} |�| �} | d urR| � || �||< q(|j�d�r�i } |jd } |j � � D ]\} }| j �| �d�d d | �}|| |< qd| | v r�| | ||< q(|S ) NrN F�location� eventheader� xmlAttributers �:r )r{ rO rG �_get_error_root�_build_name_to_xml_noder� rw r� rF �_member_key_namerh �attrib�itemsr� r� �split)r r" rf rK r{ �xml_dictr~ � member_namerk �xml_name� member_node�attribs� location_namer� r6 �new_keyr r r �_handle_structure� s@ � � � �z'BaseXMLResponseParser._handle_structurec C s2 | � |�dkr|D ] }| � |�dkr| S q |S )N� ErrorResponserV �r� )r � original_root�childr r r r� � s �z%BaseXMLResponseParser._get_error_rootc C sL |j dkr|j�d�r|jj�d�}|d ur|S |j�d�}|d ur$|S |S )Nrv r� rs )rd rF rG ri )r r" r� �list_member_serialized_name�serialized_namer r r r� � s � z&BaseXMLResponseParser._member_key_namec C st t |t�r | �|d �S i }|D ]'}| �|�}||v r3t || t�r*|| �|� q|| |g||< q|||< q|S ru )rH rv r� r� rj )r � parent_noder� rl r� r r r r� � s z-BaseXMLResponseParser._build_name_to_xml_nodec C sV zt jt �� | jd�}|�|� |�� }W |S ty* } ztd||f ��d }~ww )N)�target�encodingzTUnable to parse response (%s), invalid XML received. Further retries may succeed: %s)r � XMLParser� TreeBuilderr� �feed�closer r( )r � xml_stringrr �root�er r r �_parse_xml_string_to_dom� s � �����z.BaseXMLResponseParser._parse_xml_string_to_domc C sB |� � D ]\}}t|�r| �|�}| �|�||< q|j||< q|S r )r� rv r� �_replace_nodesr )r rK r� r6 �sub_dictr r r r� � s z$BaseXMLResponseParser._replace_nodesc C s |dkrdS dS )N�trueTFr �r r" r r r r �_handle_boolean� s z%BaseXMLResponseParser._handle_booleanc C � t |�S r )�floatr� r r r � _handle_float� � z#BaseXMLResponseParser._handle_floatc C � | � |�S r �r+ r� r r r �_handle_timestamp� � z'BaseXMLResponseParser._handle_timestampc C r� r )�intr� r r r �_handle_integer r� z%BaseXMLResponseParser._handle_integerc C rn r r r� r r r �_handle_string s z$BaseXMLResponseParser._handle_stringc C r� r �r- r� r r r � _handle_blob r� z"BaseXMLResponseParser._handle_blobr� )r r r r r� r� rm r� r� r� r� r� r� r' r� r� r� r� r� r� �_handle_character�_handle_double� _handle_long� __classcell__r r r� r r� e s4 r� c @ s> e Zd Zdd� Zdd� Zdd� Zddd �Zd d � Zd d � ZdS )� QueryParserc C s\ |d }| � |�}| �|�}| �|� d|v r |�|�d�� d|v r,d|�d�i|d< |S )Nr8 �Errors� RequestIdr; )r� r� r� r �pop)r rJ r" � xml_contentsr� rK r r r rD s zQueryParser._do_error_parsec C � | j ||dd�S )NF��inject_metadata��_parse_body_as_xmlr` r r r rC # ra z#QueryParser._do_modeled_error_parsec C r� )NTr� r� r` r r r rE & ra zQueryParser._do_parseTc C s^ |d }| � |�}i }|d ur%|}d|jv r | �|jd |�}| �||�}|r-| �||� |S )Nr8 � resultWrapper)r� rF �_find_result_wrapped_shaperh �_inject_response_metadata)r rJ r" r� r� r� rK �startr r r r� ) s � z QueryParser._parse_body_as_xmlc C s | � |�}|| S r )r� )r � element_name� xml_root_node�mappingr r r r� 8 s z&QueryParser._find_result_wrapped_shapec C sR | � |�}|�d�}|d ur'| � |�}|�� D ] \}}|j||< q||d< d S d S �Nr; )r� rG r� r )r rf � inject_intor� � child_node� sub_mappingr� r6 r r r r� < s �z%QueryParser._inject_response_metadataN)T) r r r rD rC rE r� r� r� r r r r r� s r� c s, e Zd Zdd� Z� fdd�Zdd� Z� ZS )�EC2QueryParserc C s2 | � |�}|�d�}|d urd|ji|d< d S d S )N� requestIdr� r; )r� rG r )r rf r� r� r� r r r r� H s �z(EC2QueryParser._inject_response_metadatac s0 t t| ��||�}d|v rd|�d�i|d< |S )N� RequestIDr� r; )r� r� rD r� )r rJ r" �originalr� r r rD N s �z EC2QueryParser._do_error_parsec C s@ |D ]}| � |�dkr |D ]}| � |�dkr | S q q|S )Nr� rV r� )r r� r� � errors_childr r r r� b s ��z EC2QueryParser._get_error_root)r r r r� rD r� r� r r r� r r� F s r� c @ sD e Zd Zdd� Zdd� Zdd� Zdd� Zd d � Zd d � Zd d� Z dS )�BaseJSONParserc C s� i }|j r |}|S |j}|d u rd S i }| �||�r$| �|�}| �|�S |D ] }|| }|j�d|�}|�|�} | d urF| �|| | �||< q&|S )Nrs )�is_document_typer{ r� rw r� rF rG rh ) r r" r6 � final_parsed� member_shapesr~ r� rk � json_name� raw_valuer r r r� m s, � ��z BaseJSONParser._handle_structurec C sF i }|j }|j}|�� D ]\}}| �||�}| �||�}|||< q |S r )r� r6 r� rh ) r r" r6 rK r� r� r� � actual_key� actual_valuer r r r� � s zBaseJSONParser._handle_mapc C r� r r� ro r r r r� � r zBaseJSONParser._handle_blobc C r� r r� ro r r r r� � r z BaseJSONParser._handle_timestampc C s� | � |d �}ddd�i d�}|�d|�dd��|d d< |�d�}|�d |o*t|��}|d urBd |v r<|�d d �d }||d d < | �||d � |S )Nr8 r �rT rS rU �messagerT rV r9 �__type�#rx rS r7 )�_parse_body_as_jsonrG rW �rsplitr� )r rJ r" r8 �error� response_code�coder r r rD � s � z BaseJSONParser._do_error_parsec C s$ d|v r|d |� di �d< d S d S )N�x-amzn-requestidr; r� )� setdefault)r rK r7 r r r r� � s ��z(BaseJSONParser._inject_response_metadatac C s@ |si S |� | j�}zt�|�}|W S ty d|i Y S w )Nr� )�decoder� �json�loads� ValueError)r � body_contentsr8 �original_parsedr r r r� � s �z"BaseJSONParser._parse_body_as_jsonN) r r r r� r� r� r� rD r� r� r r r r r� k s r� c @ s4 e Zd Zdd� Zdd� Zdd� Zdd� Zd d � Zd S ) �BaseEventStreamParserc C sj i }|j �d�r!|d �d�}|j�|�}|r | �||�||< |S | �|||j|� | �|||j|� |S )Nr: r7 z :event-type)rF rG r{ rE �_parse_non_payload_attrs�_parse_payload)r rJ r" r� � event_type� event_shaper r r rE � s ��z BaseEventStreamParser._do_parsec C s� |d � d�}|j� |�}|d ur/| �|d �}| �||�}d||� d|� dd��d�i}|S d|d � d d�|d � d d�d�i}|S ) Nr7 z:exception-typer8 rV rT r� r rR z :error-codez:error-message)rG r{ �_initial_body_parserh )r rJ r" �exception_type�exception_shaper r8 r� r r r rD � s" �� ���z%BaseEventStreamParser._do_error_parsec C s� |j �d�rS|D ]6}|| }|j �d�r>|d }|jdkr |}n|jdkr,|�| j�}n | �|�} | �|| �}|||< d S q| �|d �} | �|| �} |�| � d S d S )N�event� eventpayloadr8 �blob�string)rF rG rd r r� r rh r ) r rJ r" r� r� rs rk r8 � parsed_body� raw_parser � body_parsedr r r r � s$ � �z$BaseEventStreamParser._parse_payloadc C sZ |d }|D ]$}|| }|j �d�r*||v r*|| }|jdkr&| �|d �}|||< qd S )Nr7 r� � timestampg @�@)rF rG rd r+ ) r rJ r" r� r� r7 rs rk r6 r r r r � s ��z.BaseEventStreamParser._parse_non_payload_attrsc C � t d���Nr �r^ �r r r r r r � z)BaseEventStreamParser._initial_body_parseN)r r r rE rD r r r r r r r r � s r c @ � e Zd Zdd� ZdS )�EventStreamJSONParserc C � | � |�S r �r� r r r r r r 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)�BaseRestParserc C s$ i }| � |�|d< | �|||� |S r� )�_populate_response_metadata�_add_modeled_parse�r rJ r" r� r r r rE H s �zBaseRestParser._do_parsec C s6 |d u r|S |j }| �||||� | �||||� d S r )r{ r r )r rJ r" r� r� r r r r5 O s �z!BaseRestParser._add_modeled_parsec C s i }| � |||� |S r )r5 r6 r r r rC W s z&BaseRestParser._do_modeled_error_parsec C sL i }|d }d|v r|d |d< |S d|v r$|d |d< |� dd�|d< |S )Nr7 r� r� �x-amz-request-id� x-amz-id-2r �HostId)rG )r rJ rO r7 r r r r4 \ s � z*BaseRestParser._populate_response_metadatac C s� d|j v rK|j d }|| }|j �d�r | �||�}|||< d S |jdv r:|d }t|t�r4|�| j�}|||< d S | �|d �}| � ||�||< d S | �|d �}| � ||�} |� | � d S )Nr. r: )r r r8 ) rF rG rt rd rH �bytesr r� r rh r ) r rJ r" r� r� �payload_member_name� body_shaper8 r r r r r r i s$ � z BaseRestParser._parse_payloadc C s� |d }|D ]F}|| }|j �d�}|d u rq|dkr&| �||d �||< q|dkr3| �||�||< q|dkrL|j �d|�} | |v rL| �||| �||< qd S )Nr7 r� � statusCoder9 �headerrs )rF rG rh �_parse_header_map) r rJ r" r� r� r7 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