U
    nËjïh  ã                   @   sj  d dl mZmZmZmZmZmZmZmZm	Z	m
Z
 ddlmZmZmZmZmZmZmZ ddlmZmZmZ ddlmZmZ ddlmZ ddlmZmZmZm Z m!Z!m"Z"m#Z#m$Z$m%Z%m&Z& ddl'm(Z(m)Z)m*Z* dd	l+m,Z,m-Z- d
ddgZ.G dd„ de*e*d�Z/G dd„ de*e*d�Z0dZ1e
eef e2dœdd„Z3e4e
eef ee5e
ed ee6 f f dœdd„Z7G dd
„ d
ƒZ8dS )é    )
ÚAnyÚCallableÚcastÚDictÚListÚOptionalÚoverloadÚTupleÚTypeÚUnioné   )ÚConnectionClosedÚDataÚEndOfMessageÚEventÚInformationalResponseÚRequestÚResponse)Úget_comma_headerÚhas_expect_100_continueÚset_comma_header)ÚREADERSÚReadersType)ÚReceiveBuffer)
Ú_SWITCH_CONNECTÚ_SWITCH_UPGRADEÚCLIENTÚConnectionStateÚDONEÚERRORÚMIGHT_SWITCH_PROTOCOLÚ	SEND_BODYÚSERVERÚSWITCHED_PROTOCOL)ÚLocalProtocolErrorÚRemoteProtocolErrorÚSentinel)ÚWRITERSÚWritersTypeÚ
ConnectionÚ	NEED_DATAÚPAUSEDc                   @   s   e Zd ZdS )r*   N©Ú__name__Ú
__module__Ú__qualname__© r0   r0   ú3/tmp/pip-unpacked-wheel-fpxc_c9c/h11/_connection.pyr*   3   s   )Ú	metaclassc                   @   s   e Zd ZdS )r+   Nr,   r0   r0   r0   r1   r+   7   s   i @  ©ÚeventÚreturnc                 C   s0   t | jdƒ}d|krdS t| ddƒdk r,dS dS )Nó
   connectionó   closeFÚhttp_versionó   1.1T)r   ÚheadersÚgetattr)r4   Ú
connectionr0   r0   r1   Ú_keep_aliveT   s    r=   r0   )Úrequest_methodr4   r5   c                 C   sÂ   t |ƒttfkst‚t |ƒtkrf|jdksT| dksT| dkrXd|j  krPdk rXn ndS |jdksft‚t|jdƒ}|rˆ|dgks„t‚d	S t|jd
ƒ}|rªdt|d ƒffS t |ƒtkrºdS dS d S )N)éÌ   i0  ó   HEADó   CONNECTéÈ   é,  )úcontent-length)r   ó   transfer-encodingó   chunked)Úchunkedr0   ó   content-lengthrD   r   )úhttp/1.0r0   )Útyper   r   ÚAssertionErrorÚstatus_coder   r:   Úint)r>   r4   Ztransfer_encodingsZcontent_lengthsr0   r0   r1   Ú_body_framing]   s2    ÿþý ýý
rN   c                   @   s4  e Zd ZdZefee eddœdd„Ze	e
ee ee f dœdd„ƒZe	ee dœd	d
„ƒZe	ee dœdd„ƒZe	edœdd„ƒZddœdd„Zee ddœdd„Zeeee  dœdd„Zee eddœdd„Zee ee eeef eedef  dœdd„Zd6e
ee ee f ee ddœdd „Ze	eeef dœd!d"„ƒZedd#œd$d%„Z eeee! ee" f dœd&d'„Z#eeee! ee" f dœd(d)„Z$e%e&ddœd*d+„ƒZ'e%ee(e)e*e+e,f edœd,d+„ƒZ'e%eee dœd-d+„ƒZ'eee dœd.d+„Z'eee-e  dœd/d0„Z.ddœd1d2„Z/e*e*d3œd4d5„Z0dS )7r)   aB  An object encapsulating the state of an HTTP connection.

    Args:
        our_role: If you're implementing a client, pass :data:`h11.CLIENT`. If
            you're implementing a server, pass :data:`h11.SERVER`.

        max_incomplete_event_size (int):
            The maximum number of bytes we're willing to buffer of an
            incomplete event. In practice this mostly sets a limit on the
            maximum size of the request/response line + headers. If this is
            exceeded, then :meth:`next_event` will raise
            :exc:`RemoteProtocolError`.

    N)Úour_roleÚmax_incomplete_event_sizer5   c                 C   s�   || _ |ttfkr td|›�ƒ‚|| _|  |tkr:t| _nt| _tƒ | _|  | jd t	¡| _
|  | jd t¡| _tƒ | _d| _d | _d | _d| _d S )Nzexpected CLIENT or SERVER, not F)Ú_max_incomplete_event_sizer   r"   Ú
ValueErrorrO   Ú
their_roler   Ú_cstateÚ_get_io_objectr'   Ú_writerr   Ú_readerr   Ú_receive_bufferÚ_receive_buffer_closedÚtheir_http_versionÚ_request_methodÚ"client_is_waiting_for_100_continue)ÚselfrO   rP   r0   r0   r1   Ú__init__§   s     zConnection.__init__)r5   c                 C   s   t | jjƒS )z‰A dictionary like::

           {CLIENT: <client state>, SERVER: <server state>}

        See :ref:`state-machine` for details.

        )ÚdictrT   Ústates©r]   r0   r0   r1   r`   Î   s    	zConnection.statesc                 C   s   | j j| j S )zjThe current state of whichever role we are playing. See
        :ref:`state-machine` for details.
        )rT   r`   rO   ra   r0   r0   r1   Ú	our_stateÙ   s    zConnection.our_statec                 C   s   | j j| j S )znThe current state of whichever role we are NOT playing. See
        :ref:`state-machine` for details.
        )rT   r`   rS   ra   r0   r0   r1   Útheir_stateà   s    zConnection.their_statec                 C   s   | j tko| jS ©N)rS   r   r\   ra   r0   r0   r1   Ú!they_are_waiting_for_100_continueç   s    z,Connection.they_are_waiting_for_100_continuec                 C   s4   t | jjƒ}| j ¡  d| _| jr&t‚|  |¡ dS )a�  Attempt to reset our connection state for a new request/response
        cycle.

        If both client and server are in :data:`DONE` state, then resets them
        both to :data:`IDLE` state in preparation for a new request/response
        cycle on this same connection. Otherwise, raises a
        :exc:`LocalProtocolError`.

        See :ref:`keepalive-and-pipelining`.

        N)r_   rT   r`   Ústart_next_cycler[   r\   rK   Ú_respond_to_state_changes)r]   Ú
old_statesr0   r0   r1   rf   ë   s
    

zConnection.start_next_cycle)Úroler5   c                 C   s&   t | jjƒ}| j |¡ |  |¡ d S rd   )r_   rT   r`   Zprocess_errorrg   )r]   ri   rh   r0   r0   r1   Ú_process_errorÿ   s    zConnection._process_errorr3   c                 C   sT   t |ƒtkr|jdkrtS t |ƒtkrPt| jjkrPd|j  krHdk rPn ntS d S )Née   rB   rC   )rJ   r   rL   r   r   r   rT   Zpending_switch_proposals©r]   r4   r0   r0   r1   Ú_server_switch_event  s    
ÿ þþ
zConnection._server_switch_event)ri   r4   r5   c                 C   s\  t | jjƒ}|tkrNt|ƒtkrN|jdkr6| j t¡ t	|j
dƒrN| j t¡ d }|tkrd|  |¡}| j |t|ƒ|¡ t|ƒtkrŒ|j| _|| jkrÄt|ƒtttfkrÄtttttf |ƒ}|j| _t|ƒttfkrôtttttf |ƒƒsô| j ¡  t|ƒtk�rt|ƒ�rd| _t|ƒttfk�r*d| _|tk�rLt|ƒttfk�rLd| _|  ||¡ d S )NrA   s   upgradeTF)r_   rT   r`   r   rJ   r   ÚmethodZprocess_client_switch_proposalr   r   r:   r   r"   rm   Zprocess_eventr[   rS   r   r   r   r   r8   rZ   r=   Zprocess_keep_alive_disabledr   r\   r   r   rg   )r]   ri   r4   rh   Zserver_switch_eventr0   r0   r1   Ú_process_event  s<    

ýÿ
zConnection._process_event.)ri   r4   Úio_dictr5   c                 C   sZ   | j j| }|tkrHttt| jƒtttt	f |ƒƒ\}}|t | |Ž S | 
||f¡S d S rd   )rT   r`   r!   rN   r   Úbytesr[   r   r   r   Úget)r]   ri   r4   rp   ÚstateÚframing_typeÚargsr0   r0   r1   rU   @  s    
 ÿzConnection._get_io_object)rh   r4   r5   c                 C   sH   | j || j kr"|  | j|t¡| _| j|| j krD|  | j|t¡| _d S rd   )	rb   rO   rU   r'   rV   rc   rS   r   rW   )r]   rh   r4   r0   r0   r1   rg   V  s    z$Connection._respond_to_state_changesc                 C   s   t | jƒ| jfS )ab  Data that has been received, but not yet processed, represented as
        a tuple with two elements, where the first is a byte-string containing
        the unprocessed data itself, and the second is a bool that is True if
        the receive connection was closed.

        See :ref:`switching-protocols` for discussion of why you'd want this.
        )rq   rX   rY   ra   r0   r0   r1   Útrailing_dataa  s    	zConnection.trailing_data)Údatar5   c                 C   s,   |r"| j rtdƒ‚|  j|7  _nd| _ dS )aØ  Add data to our internal receive buffer.

        This does not actually do any processing on the data, just stores
        it. To trigger processing, you have to call :meth:`next_event`.

        Args:
            data (:term:`bytes-like object`):
                The new data that was just received.

                Special case: If *data* is an empty byte-string like ``b""``,
                then this indicates that the remote side has closed the
                connection (end of file). Normally this is convenient, because
                standard Python APIs like :meth:`file.read` or
                :meth:`socket.recv` use ``b""`` to indicate end-of-file, while
                other failures to read are indicated using other mechanisms
                like raising :exc:`TimeoutError`. When using such an API you
                can just blindly pass through whatever you get from ``read``
                to :meth:`receive_data`, and everything will work.

                But, if you have an API where reading an empty string is a
                valid non-EOF condition, then you need to be aware of this and
                make sure to check for such strings and avoid passing them to
                :meth:`receive_data`.

        Returns:
            Nothing, but after calling this you should call :meth:`next_event`
            to parse the newly received data.

        Raises:
            RuntimeError:
                Raised if you pass an empty *data*, indicating EOF, and then
                pass a non-empty *data*, indicating more data that somehow
                arrived after the EOF.

                (Calling ``receive_data(b"")`` multiple times is fine,
                and equivalent to calling it once.)

        z(received close, then received more data?TN)rY   ÚRuntimeErrorrX   )r]   rw   r0   r0   r1   Úreceive_datal  s
    'zConnection.receive_datac                 C   sˆ   | j }|tkr| jrtS |tks(|tkr,tS | jd k	s:t‚|  | j¡}|d krx| jsx| jrxt	| jdƒrr| j 
¡ }ntƒ }|d kr„t}|S )NÚread_eof)rc   r   rX   r+   r    r#   rW   rK   rY   Úhasattrrz   r   r*   )r]   rs   r4   r0   r0   r1   Ú_extract_next_receive_eventš  s    z&Connection._extract_next_receive_eventc              
   C   s¼   | j tkrtdƒ‚z`|  ¡ }|ttfkr<|  | jtt	|ƒ¡ |tkrnt
| jƒ| jkr`tddd�‚| jrntdƒ‚|W S  tk
r¶ } z&|  | j¡ t|tƒr¤| ¡  n‚ W 5 d}~X Y nX dS )aF  Parse the next event out of our receive buffer, update our internal
        state, and return it.

        This is a mutating operation -- think of it like calling :func:`next`
        on an iterator.

        Returns:
            : One of three things:

            1) An event object -- see :ref:`events`.

            2) The special constant :data:`NEED_DATA`, which indicates that
               you need to read more data from your socket and pass it to
               :meth:`receive_data` before this method will be able to return
               any more events.

            3) The special constant :data:`PAUSED`, which indicates that we
               are not in a state where we can process incoming data (usually
               because the peer has finished their part of the current
               request/response cycle, and you have not yet called
               :meth:`start_next_cycle`). See :ref:`flow-control` for details.

        Raises:
            RemoteProtocolError:
                The peer has misbehaved. You should close the connection
                (possibly after sending some kind of 4xx response).

        Once this method returns :class:`ConnectionClosed` once, then all
        subsequent calls will also return :class:`ConnectionClosed`.

        If this method raises any exception besides :exc:`RemoteProtocolError`
        then that's a bug -- if it happens please file a bug report!

        If this method raises any exception then it also sets
        :attr:`Connection.their_state` to :data:`ERROR` -- see
        :ref:`error-handling` for discussion.

        z+Can't receive data when peer state is ERRORzReceive buffer too longi¯  )Zerror_status_hintz#peer unexpectedly closed connectionN)rc   r   r%   r|   r*   r+   ro   rS   r   r   ÚlenrX   rQ   rY   ÚBaseExceptionrj   Ú
isinstancer$   Z!_reraise_as_remote_protocol_error)r]   r4   Úexcr0   r0   r1   Ú
next_event¶  s(    (
 ÿ

zConnection.next_eventc                 C   s   d S rd   r0   rl   r0   r0   r1   Úsend÷  s    zConnection.sendc                 C   s   d S rd   r0   rl   r0   r0   r1   r‚   û  s    c                 C   s   d S rd   r0   rl   r0   r0   r1   r‚     s    c                 C   s$   |   |¡}|dkrdS d |¡S dS )a³  Convert a high-level event into bytes that can be sent to the peer,
        while updating our internal state machine.

        Args:
            event: The :ref:`event <events>` to send.

        Returns:
            If ``type(event) is ConnectionClosed``, then returns
            ``None``. Otherwise, returns a :term:`bytes-like object`.

        Raises:
            LocalProtocolError:
                Sending this event at this time would violate our
                understanding of the HTTP/1.1 protocol.

        If this method raises any exception then it also sets
        :attr:`Connection.our_state` to :data:`ERROR` -- see
        :ref:`error-handling` for discussion.

        Nó    )Úsend_with_data_passthroughÚjoin)r]   r4   Ú	data_listr0   r0   r1   r‚     s    
c                 C   s”   | j tkrtdƒ‚zbt|ƒtkr*|  |¡}| j}|  | j|¡ t|ƒt	krPW dS |dk	s\t
‚g }|||jƒ |W S W n   |  | j¡ ‚ Y nX dS )ah  Identical to :meth:`send`, except that in situations where
        :meth:`send` returns a single :term:`bytes-like object`, this instead
        returns a list of them -- and when sending a :class:`Data` event, this
        list is guaranteed to contain the exact object you passed in as
        :attr:`Data.data`. See :ref:`sendfile` for discussion.

        z'Can't send data when our state is ERRORN)rb   r   r$   rJ   r   Ú&_clean_up_response_headers_for_sendingrV   ro   rO   r   rK   Úappendrj   )r]   r4   Úwriterr†   r0   r0   r1   r„      s     


z%Connection.send_with_data_passthroughc                 C   s   |   | j¡ dS )záNotify the state machine that we failed to send the data it gave
        us.

        This causes :attr:`Connection.our_state` to immediately become
        :data:`ERROR` -- see :ref:`error-handling` for discussion.

        N)rj   rO   ra   r0   r0   r1   Úsend_failedA  s    zConnection.send_failed)Úresponser5   c                 C   sæ   t |ƒtkst‚|j}d}tt| jƒ}|dkr2d}t||ƒ\}}|dkr’t|dg ƒ}| j	d ksh| j	dk r„t|dg ƒ}| jdkr’d}nt|dd	gƒ}| j
jrž|rÐtt|d
ƒƒ}| d¡ | d¡ t|d
t|ƒƒ}t||j|j|jd�S )NFr@   s   GET)rG   rI   rH   r9   rE   TrF   r6   s
   keep-aliver7   )r:   rL   r8   Úreason)rJ   r   rK   r:   r   rq   r[   rN   r   rZ   rT   Ú
keep_aliveÚsetr   ÚdiscardÚaddÚsortedrL   r8   rŒ   )r]   r‹   r:   Z
need_closeZmethod_for_choosing_headersrt   Ú_r<   r0   r0   r1   r‡   Z  s2    	


üz1Connection._clean_up_response_headers_for_sending)N)1r-   r.   r/   Ú__doc__Ú!DEFAULT_MAX_INCOMPLETE_EVENT_SIZEr
   r&   rM   r^   Úpropertyr   r`   rb   rc   Úboolre   rf   rj   r   r   rm   ro   r   r   r(   r   r   rU   rg   r	   rq   rv   ry   r*   r+   r|   r�   r   r   r‚   r   r   r   r   r   r   r„   rŠ   r‡   r0   r0   r0   r1   r)   —   s`   ýü' 
2
û ýü
0þ Aþ!N)9Útypingr   r   r   r   r   r   r   r	   r
   r   Z_eventsr   r   r   r   r   r   r   Ú_headersr   r   r   Ú_readersr   r   Z_receivebufferr   Ú_stater   r   r   r   r   r   r    r!   r"   r#   Z_utilr$   r%   r&   Ú_writersr'   r(   Ú__all__r*   r+   r”   r–   r=   rq   ÚstrrM   rN   r)   r0   r0   r0   r1   Ú<module>   s"   0$	0

 
þ: