o

�h3O�@s�dZd
dl
mZ
d
dlmZ
d
dlmZ
dZdZdZ	Gdd	�d	e
�ZGd
d�de�ZGdd
�d
e�Z
Gdd�de�ZGdd�de�ZGdd�de�ZGdd�d�Zd#dd�
ZGdd�d�ZGdd�d�ZGdd�d�ZGdd�d�ZGd d!�d!�Zd"S)$zBinary Event Stream Decoding�)
�crc32)
�unpack)
�EventStreamError�ii
c
@seZ
dZd
ZdS)�ParserErrorz,Base binary flow encoding parsing exception.N)�__name__�
__module__�__qualname__�__doc__�rr�G/usr/local/CyberCP/lib/python3.10/site-packages/botocore/eventstream.pyrs
rc� eZ
dZd
Z�f
dd�Z�ZS)�DuplicateHeaderz$Duplicate header found in the event.csd
|
�d�}t��
|�

dS)NzDuplicate header present: "�
"��super�__init__)�self�header�message�
�	__class__rrr#s

zDuplicateHeader.__init__�rrr	r
r�
__classcell__rrrrr �
rcr
)�InvalidHeadersLengthz*Headers length is longer than the maximum.c� d
|
�dt��}t
��|�

dS)NzHeader length of � exceeded the maximum of )�_MAX_HEADERS_LENGTHrr�r�lengthrrrrr+�

zInvalidHeadersLength.__init__rrrrrr(rrcr
)�InvalidPayloadLengthz*Payload length is longer than the maximum.cr)NzPayload length of r)�_MAX_PAYLOAD_LENGTHrrrrrrr3r!zInvalidPayloadLength.__init__rrrrrr"0rr"cr
)�ChecksumMismatchz8Calculated checksum did not match the expected checksum.cs$d
|
d�d|d��}t��
|�

dS)NzChecksum mismatch: expected 0x�08xz, calculated 0xr)r�expected�
calculatedrrrrr;s

zChecksumMismatch.__init__rrrrrr$8rr$cr
)�NoInitialResponseErrorz�An event of type initial-response was not received.

    This exception is raised when the event stream produced no events or
    the first event in the stream was not of the initial-response type.
    c
sd
}
t��
|
�

dS)Nz0First event was not of the initial-response typer)rrrrrrGs

zNoInitialResponseError.__init__rrrrrr(@s
r(c@s�eZ
dZd
ZdZdZdZdZdZdZ	dZ
d	Zeeed
�Ze
dd��
Ze
d
d��
Ze
dd��
Ze
dd��
Ze
dd��
Ze
dd��
Ze
dd��
Ze
dd��
Ze
d%dd�
�
Ze
d%dd�
�
Ze
d d!��
Ze
d"d#��
Zd$S)&�DecodeUtilsz�Unpacking utility functions used in the decoder.

    All methods on this class take raw bytes and return  a tuple containing
    the value parsed from the bytes and the number of bytes consumed to parse
    that value.
    z!Bz!Hz!Iz!bz!hz!iz!qz!III)�
��c


C�d
S)a
This method consumes none of the provided bytes and returns True.

        :type data: bytes
        :param data: The bytes to parse from. This is ignored in this method.

        :rtype: tuple
        :rtype: (bool, int)
        :returns: The tuple (True, 0)
        )Tr
r�
�datarrr�unpack_trued�zDecodeUtils.unpack_truec


Cr-)a
This method consumes none of the provided bytes and returns False.

        :type data: bytes
        :param data: The bytes to parse from. This is ignored in this method.

        :rtype: tuple
        :rtype: (bool, int)
        :returns: The tuple (False, 0)
        )Fr
rr.rrr�unpack_falseqr1zDecodeUtils.unpack_falsec
C� tt
j|d
d��d}
|
dfS)z�Parse an unsigned 8-bit integer from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: (int, int)
        :returns: A tuple containing the (parsed integer value, bytes consumed)
        Nr*r
)rr)�UINT8_BYTE_FORMAT�r/�valuerrr�unpack_uint8~�

zDecodeUtils.unpack_uint8c
Cr3)z�Parse an unsigned 32-bit integer from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: (int, int)
        :returns: A tuple containing the (parsed integer value, bytes consumed)
        Nr,r
)rr)�UINT32_BYTE_FORMATr5rrr�
unpack_uint32�r8zDecodeUtils.unpack_uint32c
Cr3)z�Parse a signed 8-bit integer from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: (int, int)
        :returns: A tuple containing the (parsed integer value, bytes consumed)
        Nr*r
)rr)�INT8_BYTE_FORMATr5rrr�unpack_int8�r8zDecodeUtils.unpack_int8c
Cr3)a

Parse a signed 16-bit integer from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: tuple
        :rtype: (int, int)
        :returns: A tuple containing the (parsed integer value, bytes consumed)
        Nr+r
)rr)�INT16_BYTE_FORMATr5rrr�unpack_int16��
zDecodeUtils.unpack_int16c
Cr3)a

Parse a signed 32-bit integer from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: tuple
        :rtype: (int, int)
        :returns: A tuple containing the (parsed integer value, bytes consumed)
        Nr,r
)rr)�INT32_BYTE_FORMATr5rrr�unpack_int32�r?zDecodeUtils.unpack_int32c
Cr3)a

Parse a signed 64-bit integer from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: tuple
        :rtype: (int, int)
        :returns: A tuple containing the (parsed integer value, bytes consumed)
        N�r
)rr)�INT64_BYTE_FORMATr5rrr�unpack_int64�r?zDecodeUtils.unpack_int64r+cCs<tj
|
}t||d
|
��d}||
}||
|�}||fS)a�Parse a variable length byte array from the bytes.

        The bytes are expected to be in the following format:
            [ length ][0 ... length bytes]
        where length is an unsigned integer represented in the smallest number
        of bytes to hold the maximum length of the array.

        :type data: bytes
        :param data: The bytes to parse from.

        :type length_byte_size: int
        :param length_byte_size: The byte size of the preceding integer that
        represents the length of the array. Supported values are 1, 2, and 4.

        :rtype: (bytes, int)
        :returns: A tuple containing the (parsed byte array, bytes consumed).
        Nr
)r)�UINT_BYTE_FORMATr)r/�length_byte_size�uint_byte_formatr �	bytes_end�array_bytesrrr�unpack_byte_array�s





zDecodeUtils.unpack_byte_arraycCst�
||
�\}}|�d
�
|fS)a�Parse a variable length utf-8 string from the bytes.

        The bytes are expected to be in the following format:
            [ length ][0 ... length bytes]
        where length is an unsigned integer represented in the smallest number
        of bytes to hold the maximum length of the array and the following
        bytes are a valid utf-8 string.

        :type data: bytes
        :param bytes: The bytes to parse from.

        :type length_byte_size: int
        :param length_byte_size: The byte size of the preceding integer that
        represents the length of the array. Supported values are 1, 2, and 4.

        :rtype: (str, int)
        :returns: A tuple containing the (utf-8 string, bytes consumed).
        zutf-8)r)rJ�decode)r/rFrI�consumedrrr�unpack_utf8_string�s
�zDecodeUtils.unpack_utf8_stringc

Cs|d
d�dfS)z�Parse a 16-byte uuid from the bytes.

        :type data: bytes
        :param data: The bytes to parse from.

        :rtype: (bytes, int)
        :returns: A tuple containing the (uuid bytes, bytes consumed).
        N�rr.rrr�unpack_uuid

s
zDecodeUtils.unpack_uuidc

Cstt
j|�tfS)
a�
Parse the prelude for an event stream message from the bytes.

        The prelude for an event stream message has the following format:
            [total_length][header_length][prelude_crc]
        where each field is an unsigned 32-bit integer.

        :rtype: ((int, int, int), int)
        :returns: A tuple of ((total_length, headers_length, prelude_crc),
        consumed)
        )rr)�PRELUDE_BYTE_FORMAT�_PRELUDE_LENGTHr.rrr�unpack_prelude

szDecodeUtils.unpack_preludeN)
r+)rrr	r
r4�UINT16_BYTE_FORMATr9r;r=r@rCrPrE�staticmethodr0r2r7r:r<r>rArDrJrMrOrRrrrrr)LsL









�





















r)cCs$t||�d
@}|
|krt
|
|��
dS)Nl��)rr$)r/�checksum�crc�computed_checksumrrr�_validate_checksum
s


�rXc@s<eZ
dZd
Zdd�Zedd��
Zedd��
Zedd	��
Zd
S)�MessagePreludez2Represents the prelude of an event stream message.cCs|
|_||_
||_dS�
N)�total_length�headers_lengthrV)rr[r\rVrrrr'
s



zMessagePrelude.__init__c

Cs|j|j
td
S)z�Calculates the total payload length.

        The extra minus 4 bytes is for the message CRC.

        :rtype: int
        :returns: The total payload length.
        r,)r[r\rQ�
rrrr�payload_length,
s	zMessagePrelude.payload_lengthc

Cs
|jd
S)a	
Calculates the byte offset for the end of the message payload.

        The extra minus 4 bytes is for the message CRC.

        :rtype: int
        :returns: The byte offset from the beginning of the event stream
        message to the end of the payload.
        r,)
r[r]rrr�payload_end7
s

zMessagePrelude.payload_endc

Cs
t|j
S)
z�Calculates the byte offset for the end of the message headers.

        :rtype: int
        :returns: The byte offset from the beginning of the event stream
        message to the end of the headers.
        )rQr\r]rrr�headers_endC
s
zMessagePrelude.headers_endN)	rrr	r
r�propertyr^r_r`rrrrrY$
s






rYc@s"eZ
dZd
Zdd�Zddd�
ZdS)	�EventStreamMessagez#Represents an event stream message.cCs|
|_||_
||_||_dSrZ)�prelude�headers�payloadrV)rrcrdrerVrrrrQ
s




zEventStreamMessage.__init__��cCs0|j�
d
�
}|dks|dkrd}
|
|j|jd�S)Nz
:message-type�error�	exceptioni�
)�status_coderd�body)rd�getre)rri�message_typerrr�to_response_dictW
s




�z#EventStreamMessage.to_response_dictN)
rf)rrr	r
rrmrrrrrbN
s
rbc@s~eZ
dZd
Zejejejejej	ej
ejejej
ej
d�
Zdd�Zdd�Zdd�Zd	d
�Zdd�Zd
d�Zdd�Zdd�ZdS)�EventStreamHeaderParsera

Parses the event headers from an event stream message.

    Expects all of the header data upfront and creates a dictionary of headers
    to return. This object can be reused multiple times to parse the headers
    from multiple event stream messages.
    )
r
r*r+�r,���rB�	c

Cs
d|_dSrZ�
�_datar]rrrr�
s

z EventStreamHeaderParser.__init__cCs|
|_|�
�S)
a
Parses the event stream headers from an event stream message.

        :type data: bytes
        :param data: The bytes that correspond to the headers section of an
        event stream message.

        :rtype: dict
        :returns: A dictionary of header key, value pairs.
        )ru�_parse_headers�rr/rrr�parse�
s

zEventStreamHeaderParser.parsec
Cs8i}
|jr|�
�\}}||
vrt|�
�
||
|<|js|
SrZ)ru�
_parse_headerr)rrd�namer6rrrrv�
s





�z&EventStreamHeaderParser._parse_headersc
Cs|��}
|�
�}|
|fSrZ)�_parse_name�_parse_value)rrzr6rrrry�
s


z%EventStreamHeaderParser._parse_headerc
Cs t�
|jd
�\}
}|�|�

|
S)Nr*)r)rMru�
_advance_data)rrzrLrrrr{�
s



z#EventStreamHeaderParser._parse_namec
Cst�
|j�
\}
}|�|�

|
SrZ)r)r7rur})r�typerLrrr�_parse_type�
s



z#EventStreamHeaderParser._parse_typec
Cs.|��}
|j
|
}||j�
\}}|�|�

|SrZ)r�_HEADER_TYPE_MAPrur})r�header_type�value_unpackerr6rLrrrr|�
s







z$EventStreamHeaderParser._parse_valuecCs|j|
d�|_dSrZrt)rrLrrrr}�
s
z%EventStreamHeaderParser._advance_dataN)rrr	r
r)r0r2r<r>rArDrJrMrOr�rrxrvryr{rr|r}rrrrrnb
s*
�
	rnc@s�eZ
dZd
Zdd�Zdd�Zdd�Zdd	�Zd
d�Zdd
�Z	dd�Z
dd�Zdd�Zdd�Z
dd�Zdd�Zdd�Zdd�ZdS)�EventStreamBufferz�Streaming based event stream buffer

    A buffer class that wraps bytes from an event stream providing parsed
    messages as they become available via an iterable interface.
    c

Csd
|_d|_
t�|_dS)N�)ru�_preludern�_header_parserr]rrrr�
s


zEventStreamBuffer.__init__cCs|j|
7_d
S)z�Add data to the buffer.

        :type data: bytes
        :param data: The bytes to add to the buffer to be used when parsing
        Nrtrwrrr�add_data�
szEventStreamBuffer.add_datacCs,|
jt
kr
t|
j�
�
|
jtkrt|
j�
�
dSrZ)r\rrr^r#r")rrcrrr�_validate_prelude�
s







�z#EventStreamBuffer._validate_preludec
CsJ|jdt
�}
t�|
�
\}}t|�}|�|�

t|
dt
d
�|j�
|S�Nr,)rurQr)rRrYr�rXrV)r�
prelude_bytes�raw_prelude�
_rcrrr�_parse_prelude�
s





z EventStreamBuffer._parse_preludec
Cs|jt
|jj�}
|j�|
�
SrZ)rurQr�r`r�rx)r�header_bytesrrrrv�
s

z EventStreamBuffer._parse_headersc
Cs|j}
|j
|
j|
j�}|SrZ)r�rur`r_)rrc�
payload_bytesrrr�_parse_payload�
s


z EventStreamBuffer._parse_payloadc
Cs*|j}
|j
|
j|
j�}t�|�
\}}|SrZ)r�rur_r[r)r:)rrc�	crc_bytes�message_crcr�rrr�_parse_message_crc�
s



z$EventStreamBuffer._parse_message_crcc
Cs|jt
d
|jj�}
|
Sr�)rurQr�r_)r�
message_bytesrrr�_parse_message_bytes�
s
�z&EventStreamBuffer._parse_message_bytesc
Cs&|��}
|�
�}t||
|jjd
�
|
S)N)
rV)r�r�rXr�rV)rr�r�rrr�_validate_message_crc�
s



z'EventStreamBuffer._validate_message_crcc
Cs4|��}
|�
�}|��}t|j|||
�}|��
|SrZ)r�rvr�rbr��_prepare_for_next_message)rrVrdrerrrr�_parse_message�
s





z EventStreamBuffer._parse_messagec

Cs|j|j
jd�|_d|_
dSrZ)rur�r[r]rrrr��
s

z+EventStreamBuffer._prepare_for_next_messagec

CsHt|j
�
tkr
t��
|jd
ur|��|_t|j
�
|jjkr t��
|��S)z�Provides the next available message parsed from the stream

        :rtype: EventStreamMessage
        :returns: The next event stream message
        N)�lenrurQ�
StopIterationr�r�r[r�r]rrr�nexts




zEventStreamBuffer.nextc

Cs|��SrZ)
r�r]rrr�__next__s
zEventStreamBuffer.__next__c


Cs|SrZrr]rrr�__iter__s
zEventStreamBuffer.__iter__N)rrr	r
rr�r�r�rvr�r�r�r�r�r�r�r�r�rrrrr��
s 
	r�c@s@eZ
dZd
Zdd�Zdd�Zdd�Zdd	�Zd
d�Zdd
�Z	dS)�EventStreama�Wrapper class for an event stream body.

    This wraps the underlying streaming body, parsing it for individual events
    and yielding them as they come available through the iterator interface.

    The following example uses the S3 select API to get structured data out of
    an object stored in S3 using an event stream.

    **Example:**
    ::
        from botocore.session import Session

        s3 = Session().create_client('s3')
        response = s3.select_object_content(
            Bucket='bucketname',
            Key='keyname',
            ExpressionType='SQL',
            RequestProgress={'Enabled': True},
            Expression="SELECT * FROM S3Object s",
            InputSerialization={'CSV': {}},
            OutputSerialization={'CSV': {}},
        )
        # This is the event stream in the response
        event_stream = response['Payload']
        end_event_received = False
        with open('output', 'wb') as f:
            # Iterate over events in the event stream as they come
            for event in event_stream:
                # If we received a records event, write the data to a file
                if 'Records' in event:
                    data = event['Records']['Payload']
                    f.write(data)
                # If we received a progress event, print the details
                elif 'Progress' in event:
                    print(event['Progress']['Details'])
                # End event indicates that the request finished successfully
                elif 'End' in event:
                    print('Result is complete')
                    end_event_received = True
        if not end_event_received:
            raise Exception("End event not received, request incomplete.")
    cCs&|
|_||_
||_||_|��|_dSrZ)�_raw_stream�
_output_shape�_operation_name�_parser�_create_raw_event_generator�_event_generator)r�
raw_stream�output_shape�parser�operation_namerrrrGs





zEventStream.__init__c
cs&�|jD]}
|�
|
�
}|r|V
qdSrZ)r��_parse_event)r�event�parsed_eventrrrr�Ns�





��zEventStream.__iter__c
cs0�t�}
|j
��D]}|
�|�

|
EdH
q	dSrZ)r�r��streamr�)r�event_stream_buffer�chunkrrrr�Ts�




�z'EventStream._create_raw_event_generatorcCs4|
��}|j
�||j�}|d
dkr|St||j��
)Nrirf)rmr�rxr�rr�)rr��
response_dict�parsed_responserrrr�Zs




zEventStream._parse_eventc
CsDzt|j
�
}
|
j�d
�
}|dkr|
WSWt��
ty!


Yt��
w)Nz:event-typezinitial-response)r�r�rdrkr�r()r�
initial_event�
event_typerrr�get_initial_responsebs





��

�z EventStream.get_initial_responsec

Cs|j�
�
d
S)z%Closes the underlying streaming body.N)r��closer]rrrr�lszEventStream.closeN)
rrr	r
rr�r�r�r�r�rrrrr�s
+
r�N)
r
)r
�binasciir�structr�botocore.exceptionsrrQrr#�	Exceptionrrrr"r$r(r)rXrYrbrnr�r�rrrr�<module>
s*



Q*Te