o
    [hh                     @   sn  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- g d
Z.G dd de*e*dZ/G dd de*e*dZ0dZ1de
eef de2fddZ3de4de
eef dee5e
ed ee6 f f fddZ7G dd dZ8dS )    )
AnyCallablecastDictListOptionaloverloadTupleTypeUnion   )ConnectionClosedDataEndOfMessageEventInformationalResponseRequestResponse)get_comma_headerhas_expect_100_continueset_comma_header)READERSReadersType)ReceiveBuffer)
_SWITCH_CONNECT_SWITCH_UPGRADECLIENTConnectionStateDONEERRORMIGHT_SWITCH_PROTOCOL	SEND_BODYSERVERSWITCHED_PROTOCOL)LocalProtocolErrorRemoteProtocolErrorSentinel)WRITERSWritersType)
Connection	NEED_DATAPAUSEDc                   @      e Zd ZdS )r*   N__name__
__module____qualname__ r1   r1   v/home/ubuntu/experiments/live_experiments/Pythonexperiments/Otree/venv/lib/python3.10/site-packages/h11/_connection.pyr*   3       r*   )	metaclassc                   @   r,   )r+   Nr-   r1   r1   r1   r2   r+   7   r3   r+   i @  eventreturnc                 C   s0   t | jd}d|v rdS t| dddk rdS dS )N
   connection   closeFhttp_version   1.1T)r   headersgetattr)r5   
connectionr1   r1   r2   _keep_aliveT   s   r>   request_methodr1   c                 C   s   t |ttfv s
J t |tu r4|jdv s+| dks+| dkr-d|j  kr)dk r-dS  ndS |jdks4J t|jd}|rE|dgksCJ d	S t|jd
}|rVdt|d ffS t |tu r^dS dS )N)   i0     HEAD   CONNECT   ,  )content-length)r      transfer-encoding   chunked)chunkedr1      content-lengthrE   r   )http/1.0r1   )typer   r   status_coder   r;   int)r?   r5   Ztransfer_encodingsZcontent_lengthsr1   r1   r2   _body_framing]   s&   
rN   c                   @   sR  e Zd ZdZefdee deddfddZe	de
ee ee f fdd	Ze	dee fd
dZe	dee fddZe	defddZd6ddZdee ddfddZdedeee  fddZdee deddfddZdee dee deeef deedef  fddZ	d7de
ee ee f dee ddfdd Ze	deeef fd!d"Zd#eddfd$d%Z deeee! ee" f fd&d'Z#deeee! ee" f fd(d)Z$e%de&ddfd*d+Z'e%dee(e)e*e+e,f defd,d+Z'e%dedee fd-d+Z'dedee fd.d+Z'dedee-e  fd/d0Z.d6d1d2Z/d3e*de*fd4d5Z0dS )8r)   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`.

    our_rolemax_incomplete_event_sizer6   Nc                 C   s   || _ |ttfvrtd||| _|  |tu rt| _nt| _t | _| | jd t	| _
| | jd t| _t | _d| _d | _d | _d| _d S )Nzexpected CLIENT or SERVER, not F)_max_incomplete_event_sizer   r"   
ValueErrorrO   
their_roler   _cstate_get_io_objectr'   _writerr   _readerr   _receive_buffer_receive_buffer_closedtheir_http_version_request_method"client_is_waiting_for_100_continue)selfrO   rP   r1   r1   r2   __init__   s    
zConnection.__init__c                 C   s   t | jjS )zA dictionary like::

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

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

        )dictrT   statesr]   r1   r1   r2   r`      s   	zConnection.statesc                 C      | j j| j S )zjThe current state of whichever role we are playing. See
        :ref:`state-machine` for details.
        )rT   r`   rO   ra   r1   r1   r2   	our_state      zConnection.our_statec                 C   rb   )znThe current state of whichever role we are NOT playing. See
        :ref:`state-machine` for details.
        )rT   r`   rS   ra   r1   r1   r2   their_state   rd   zConnection.their_statec                 C   s   | j tu o| jS N)rS   r   r\   ra   r1   r1   r2   !they_are_waiting_for_100_continue   s   z,Connection.they_are_waiting_for_100_continuec                 C   s4   t | jj}| j  d| _| jrJ | | 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`   start_next_cycler[   r\   _respond_to_state_changes)r]   
old_statesr1   r1   r2   rh      s
   

zConnection.start_next_cyclerolec                 C   s&   t | jj}| j| | | d S rf   )r_   rT   r`   Zprocess_errorri   )r]   rk   rj   r1   r1   r2   _process_error   s   zConnection._process_errorr5   c                 C   sT   t |tu r|jdkrtS t |tu r(t| jjv r(d|j  kr%dk r(tS  d S d S )Ne   rC   rD   )rK   r   rL   r   r   r   rT   Zpending_switch_proposalsr]   r5   r1   r1   r2   _server_switch_event  s   zConnection._server_switch_eventc                 C   sR  t | jj}|tu r't|tu r'|jdkr| jt t	|j
dr'| jt d }|tu r2| |}| j|t|| t|tu rF|j| _|| ju rbt|tttfv rbtttttf |}|j| _t|ttfv rztttttf |sz| j  t|tu rt|rd| _t|ttfv rd| _|tu rt|ttfv rd| _| || d S )NrB   s   upgradeTF)r_   rT   r`   r   rK   r   methodZprocess_client_switch_proposalr   r   r;   r   r"   ro   Zprocess_eventr[   rS   r   r   r   r   r9   rZ   r>   Zprocess_keep_alive_disabledr   r\   r   r   ri   )r]   rk   r5   rj   Zserver_switch_eventr1   r1   r2   _process_event  s<   


zConnection._process_eventio_dict.c                 C   sV   | j j| }|tu r$ttt| jtttt	f |\}}|t | | S |
||fS rf   )rT   r`   r!   rN   r   bytesr[   r   r   r   get)r]   rk   r5   rr   stateframing_typeargsr1   r1   r2   rU   @  s   zConnection._get_io_objectrj   c                 C   sL   | j || j kr| | j|t| _| j|| j kr$| | j|t| _d S d S rf   )	rc   rO   rU   r'   rV   re   rS   r   rW   )r]   rj   r5   r1   r1   r2   ri   V  s
   z$Connection._respond_to_state_changesc                 C   s   t | j| 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.
        )rs   rX   rY   ra   r1   r1   r2   trailing_dataa  s   	zConnection.trailing_datadatac                 C   s.   |r| j r	td|  j|7  _dS d| _ dS )a  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   RuntimeErrorrX   )r]   ry   r1   r1   r2   receive_datal  s
   '
zConnection.receive_datac                 C   s   | j }|tu r| jrtS |tu s|tu rtS | jd usJ | | j}|d u r<| js<| jr<t| jdr9| j	 }nt
 }|d u rBt}|S )Nread_eof)re   r   rX   r+   r    r#   rW   rY   hasattrr|   r   r*   )r]   ru   r5   r1   r1   r2   _extract_next_receive_event  s   z&Connection._extract_next_receive_eventc              
   C   s   | j tu r	tdz0|  }|ttfvr| | jtt	| |tu r7t
| j| jkr0tddd| jr7td|W S  ty] } z| | j t|trQ|  n W Y d}~dS d}~ww )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)re   r   r%   r~   r*   r+   rq   rS   r   r   lenrX   rQ   rY   BaseExceptionrl   
isinstancer$   Z!_reraise_as_remote_protocol_error)r]   r5   excr1   r1   r2   
next_event  s,   
(

zConnection.next_eventc                 C      d S rf   r1   rn   r1   r1   r2   send     zConnection.sendc                 C   r   rf   r1   rn   r1   r1   r2   r     s   c                 C   r   rf   r1   rn   r1   r1   r2   r     r   c                 C   s    |  |}|du rdS d|S )a  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.

        N    )send_with_data_passthroughjoin)r]   r5   	data_listr1   r1   r2   r     s   

c                 C   s   | j tu r	tdz/t|tu r| |}| j}| | j| t|t	u r(W dS |dus.J g }|||j
 |W S    | | j  )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)rc   r   r$   rK   r   &_clean_up_response_headers_for_sendingrV   rq   rO   r   appendrl   )r]   r5   writerr   r1   r1   r2   r      s    

z%Connection.send_with_data_passthroughc                 C   s   |  | j dS )zNotify 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)rl   rO   ra   r1   r1   r2   send_failedA  s   zConnection.send_failedresponsec                 C   s   t |tu sJ |j}d}tt| j}|dkrd}t||\}}|dv rIt|dg }| jd u s4| jdk rBt|dg }| jdkrAd}nt|dd	g}| j	j
rO|rhtt|d
}|d |d t|d
t|}t||j|j|jdS )NFrA   s   GET)rH   rJ   rI   r:   rF   TrG   r7   s
   keep-aliver8   )r;   rL   r9   reason)rK   r   r;   r   rs   r[   rN   r   rZ   rT   
keep_alivesetr   discardaddsortedrL   r9   r   )r]   r   r;   Z
need_closeZmethod_for_choosing_headersrv   _r=   r1   r1   r2   r   Z  s4   	


z1Connection._clean_up_response_headers_for_sending)r6   Nrf   )1r.   r/   r0   __doc__!DEFAULT_MAX_INCOMPLETE_EVENT_SIZEr
   r&   rM   r^   propertyr   r`   rc   re   boolrg   rh   rl   r   r   ro   rq   r   r   r(   r   r   rU   ri   r	   rs   rx   r{   r*   r+   r~   r   r   r   r   r   r   r   r   r   r   r   r   r   r1   r1   r1   r2   r)      sx    
' 

0



.
 A
!r)   N)9typingr   r   r   r   r   r   r   r	   r
   r   Z_eventsr   r   r   r   r   r   r   _headersr   r   r   _readersr   r   Z_receivebufferr   _stater   r   r   r   r   r   r    r!   r"   r#   Z_utilr$   r%   r&   _writersr'   r(   __all__r*   r+   r   r   r>   rs   strrM   rN   r)   r1   r1   r1   r2   <module>   s*   0$	0	

: