U
    EZh                     @  s   d dl mZ d dlZd dlZd dl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 dZddd	d
hZG dd dZdS )    )annotationsN)HeadersMutableHeaders)PlainTextResponseResponse)ASGIAppMessageReceiveScopeSend)DELETEGETHEADOPTIONSPATCHPOSTPUTAcceptzAccept-LanguagezContent-LanguagezContent-Typec                   @  s   e Zd Zd)dddddd	dd
dd	ddZdddddddZdddddZdddddZdddddddd Zd!dddd"d#d$Ze	d%ddd&d'd(Z
dS )*CORSMiddleware r   FNX  r   ztyping.Sequence[str]boolz
str | NoneintNone)	appallow_originsallow_methodsallow_headersallow_credentialsallow_origin_regexexpose_headersmax_agereturnc	                 C  s  d|krt }d }	|d k	r"t|}	d|k}
d|k}|
 p:|}i }|
rLd|d< |rXd|d< |rjd||d< i }|r|d|d< nd|d< |d|t|d	 ttt|B }|r|sd||d
< |rd|d< || _	|| _
|| _dd |D | _|
| _|| _|| _|	| _|| _|| _d S )N*Access-Control-Allow-Origintruez Access-Control-Allow-Credentials, zAccess-Control-Expose-HeadersOriginZVary)zAccess-Control-Allow-MethodszAccess-Control-Max-AgeAccess-Control-Allow-Headersc                 S  s   g | ]}|  qS r   lower.0hr   r   `/home/aprabhat/apps/x.techxrdev.in/venv/lib/python3.8/site-packages/starlette/middleware/cors.py
<listcomp>C   s     z+CORSMiddleware.__init__.<locals>.<listcomp>)ALL_METHODSrecompilejoinupdatestrsortedSAFELISTED_HEADERSsetr   r   r   r   allow_all_originsallow_all_headerspreflight_explicit_allow_originr    simple_headerspreflight_headers)selfr   r   r   r   r   r    r!   r"   Zcompiled_allow_origin_regexr:   r;   r<   r=   r>   r   r   r/   __init__   sN    


zCORSMiddleware.__init__r
   r	   r   )scopereceivesendr#   c                   s   |d dkr$|  |||I d H  d S |d }t|d}|d}|d kr`|  |||I d H  d S |dkrd|kr| j|d}||||I d H  d S | j||||dI d H  d S )	NtypehttpmethodrA   originr   access-control-request-method)request_headers)r   r   getpreflight_responsesimple_response)r?   rA   rB   rC   rF   headersrH   responser   r   r/   __call__K   s    

zCORSMiddleware.__call__r6   )rH   r#   c                 C  s.   | j r
dS | jd k	r$| j|r$dS || jkS )NT)r:   r    	fullmatchr   )r?   rH   r   r   r/   is_allowed_origin_   s
    z CORSMiddleware.is_allowed_originr   r   )rJ   r#   c           	      C  s   |d }|d }| d}t| j}g }| j|drD| jrN||d< n
|d || jkrb|d | jrz|d k	rz||d< n>|d k	rdd	 |d
D D ] }|	 | j
kr|d  qq|rdd| }t|d|dS tdd|dS )NrH   rI   zaccess-control-request-headersrH   r%   rF   r)   c                 S  s   g | ]}|  qS r   r*   r,   r   r   r/   r0      s     z5CORSMiddleware.preflight_response.<locals>.<listcomp>,rN   zDisallowed CORS r'   i  )status_coderN   OK   )rK   dictr>   rR   r<   appendr   r;   splitstripr   r4   r   )	r?   rJ   Zrequested_originZrequested_methodZrequested_headersrN   ZfailuresheaderZfailure_textr   r   r/   rL   h   s,    







z!CORSMiddleware.preflight_response)rA   rB   rC   rJ   r#   c                   s*   t j| j||d}| |||I d H  d S )N)rC   rJ   )	functoolspartialrC   r   )r?   rA   rB   rC   rJ   r   r   r/   rM      s    zCORSMiddleware.simple_responser   )messagerC   rJ   r#   c                   s   |d dkr||I d H  d S | dg  t|d}|| j |d }d|k}| jrh|rh| || n| js| j|dr| || ||I d H  d S )NrD   zhttp.response.startrN   rG   r(   cookierS   )
setdefaultr   r5   r=   r:   allow_explicit_originrR   )r?   r_   rC   rJ   rN   rH   Z
has_cookier   r   r/   rC      s    

zCORSMiddleware.sendr   )rN   rH   r#   c                 C  s   || d< |  d d S )Nr%   r(   )Zadd_vary_header)rN   rH   r   r   r/   rb      s    z$CORSMiddleware.allow_explicit_origin)r   r   r   FNr   r   )__name__
__module____qualname__r@   rP   rR   rL   rM   rC   staticmethodrb   r   r   r   r/   r      s           ;	&r   )
__future__r   r]   r2   typingZstarlette.datastructuresr   r   Zstarlette.responsesr   r   Zstarlette.typesr   r   r	   r
   r   r1   r8   r   r   r   r   r/   <module>   s   