U
    Rh#                     @  s   d dl mZ d dlZd dlZd dlmZmZ d dlmZ d dl	m
Z
mZ d dlmZmZ d dlmZmZmZmZmZ ejegeje f Zejeegeje f ZedZG d	d
 d
eZG dd dZG dd deZdS )    )annotationsN)ObjectReceiveStreamObjectSendStream)collapse_excgroups)ClientDisconnectRequest)AsyncContentStreamResponse)ASGIAppMessageReceiveScopeSendTc                      s6   e Zd ZdZddd fddZddd	d
Z  ZS )_CachedRequesta  
    If the user calls Request.body() from their dispatch function
    we cache the entire request body in memory and pass that to downstream middlewares,
    but if they call Request.stream() then all we do is send an
    empty body so that downstream things don't hang forever.
    r   r   )scopereceivec                   s(   t  || d| _d| _|  | _d S )NF)super__init___wrapped_rcv_disconnected_wrapped_rcv_consumedstreamZ_wrapped_rc_stream)selfr   r   	__class__ ?./venv/lib/python3.8/site-packages/starlette/middleware/base.pyr      s    z_CachedRequest.__init__r   returnc                   s   | j rddiS | jr^| jr(d| _ ddiS |  I d H }|d dkrTtd|d  d| _ |S t| dd d k	rd| _d| jddS | jrd| _dd	ddS z0|  }|	 I d H }| j| _d|| j dW S  t
k
r   d| _ ddi Y S X d S )
Ntypehttp.disconnectTzUnexpected message received: _bodyzhttp.requestFr   body	more_body    )r   r   Z_is_disconnectedr   RuntimeErrorgetattrr!   Z_stream_consumedr   	__anext__r   )r   msgr   chunkr   r   r   wrapped_receive    sD    z_CachedRequest.wrapped_receive)__name__
__module____qualname____doc__r   r+   __classcell__r   r   r   r   r      s   r   c                   @  sF   e Zd ZdddddddZdd	d
ddddZddddddZdS )BaseHTTPMiddlewareNr
   zDispatchFunction | NoneNone)appdispatchr   c                 C  s   || _ |d kr| jn|| _d S N)r3   r4   dispatch_func)r   r3   r4   r   r   r   r   _   s    zBaseHTTPMiddleware.__init__r   r   r   r   r   sendr   c                   s   d dkr$ ||I d H  d S t|}|jt  ddd fdd}t T t 4 I d H 2||I d H }||I d H     W 5 Q I d H R X W 5 Q R X d S )Nr   Zhttpr   r	   )requestr   c                   s.  d  t  \dd	fddddfdd}dddfd	d
dd fdd}| | z@ I d H }|dd }|d dkr|d k	r I d H }W n* t jk
r    d k	rڈ tdY nX |d dkstdd fdd}t|d | |d}|d |_	|S )Nr   r   c               
     sv     rddiS t 4 I d H 6 ddd fdd}  | j | I d H }W 5 Q I d H R X   rrddiS |S )Nr   r    z(typing.Callable[[], typing.Awaitable[T]]r   )funcr   c                   s   |  I d H } j   |S r5   )Zcancel_scopecancel)r:   result
task_groupr   r   wrapx   s    
z[BaseHTTPMiddleware.__call__.<locals>.call_next.<locals>.receive_or_disconnect.<locals>.wrap)is_setanyiocreate_task_group
start_soonwait)r?   message)response_sentr+   r=   r   receive_or_disconnectr   s    zMBaseHTTPMiddleware.__call__.<locals>.call_next.<locals>.receive_or_disconnectr2   c                     s     I d H     d S r5   )rD   closer   )recv_streamrF   r   r   "close_recv_stream_on_response_sent   s    zZBaseHTTPMiddleware.__call__.<locals>.call_next.<locals>.close_recv_stream_on_response_sent)rE   r   c                   s2   z  | I d H  W n tjk
r,   Y d S X d S r5   )r8   rA   ZBrokenResourceError)rE   )send_streamr   r   send_no_error   s    zEBaseHTTPMiddleware.__call__.<locals>.call_next.<locals>.send_no_errorc                    sb   4 I d H F z I d H  W n& tk
rL }  z|  W 5 d } ~ X Y nX W 5 Q I d H R X d S r5   )r3   	Exception)exc)app_excrG   r   r   rL   rK   r   r   coro   s
    z<BaseHTTPMiddleware.__call__.<locals>.call_next.<locals>.coroinfor   http.response.debugzNo response returned.http.response.startz"typing.AsyncGenerator[bytes, None]c               
    sx   4 I d H P 2 zB3 d H W } | d dks.t | dd}|rD|V  | dds qXq6 W 5 Q I d H R X  d k	rt d S )Nr   http.response.bodyr#   r%   r$   F)AssertionErrorget)rE   r#   )rO   rI   r   r   body_stream   s    zCBaseHTTPMiddleware.__call__.<locals>.call_next.<locals>.body_streamstatus)status_codecontentrQ   headers)
rA   Zcreate_memory_object_streamrC   r   rV   ZEndOfStreamr&   rU   _StreamingResponseraw_headers)r9   rJ   rP   rE   rQ   rW   responserF   r   r   r>   r+   )rO   rG   rI   rL   rK   r   	call_nextl   s,    	


z.BaseHTTPMiddleware.__call__.<locals>.call_next)	r3   r   r+   rA   Eventr   rB   r6   set)r   r   r   r8   r9   r`   r^   r   r_   r   __call__c   s    
MzBaseHTTPMiddleware.__call__r   RequestResponseEndpointr	   )r9   r`   r   c                   s
   t  d S r5   )NotImplementedError)r   r9   r`   r   r   r   r4      s    zBaseHTTPMiddleware.dispatch)N)r,   r-   r.   r   rc   r4   r   r   r   r   r1   ^   s   \r1   c                   @  s:   e Zd Zdddddddd	d
dZdddddddZdS )r\      Nr   intztyping.Mapping[str, str] | Nonez
str | Nonez&typing.Mapping[str, typing.Any] | Noner2   )rZ   rY   r[   
media_typerQ   r   c                 C  s,   || _ || _|| _|| _| | d | _d S r5   )rQ   body_iteratorrY   rh   Zinit_headers
background)r   rZ   rY   r[   rh   rQ   r   r   r   r      s    
z_StreamingResponse.__init__r   r   r   r7   c                   s   | j d k	r |d| j dI d H  |d| j| jdI d H  | j2 z"3 d H W }|d|ddI d H  q@6 |ddd	dI d H  | jr|  I d H  d S )
NrR   )r   rQ   rS   )r   rX   r[   rT   Tr"   r%   F)rQ   rY   r]   ri   rj   )r   r   r   r8   r*   r   r   r   rc      s    

z_StreamingResponse.__call__)rf   NNN)r,   r-   r.   r   rc   r   r   r   r   r\      s       r\   )Z
__future__r   typingrA   Z	anyio.abcr   r   Zstarlette._utilsr   Zstarlette.requestsr   r   Zstarlette.responsesr   r	   Zstarlette.typesr
   r   r   r   r   Callable	Awaitablerd   ZDispatchFunctionZTypeVarr   r   r1   r\   r   r   r   r   <module>   s   
Le