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o �b�& � @ s� d Z ddlmZmZmZ ddlmZ ddlm Z ddl m Z m Z m Z mZ ddlmZ ddlmZ G dd � d e �ZG d d � d e �ZG d d � d e�ZG dd� de �ZG dd� de�ZG dd� de �ZG dd� de�ZdS )aT Simplistic HTTP proxy support. This comes in two main variants - the Proxy and the ReverseProxy. When a Proxy is in use, a browser trying to connect to a server (say, www.yahoo.com) will be intercepted by the Proxy, and the proxy will covertly connect to the server, and return the result. When a ReverseProxy is in use, the client connects directly to the ReverseProxy (say, www.yahoo.com) which farms off the request to one of a pool of servers, and returns the result. Normally, a Proxy is used on the client end of an Internet connection, while a ReverseProxy is used on the server end. � )�quote�urlparse� urlunparse)�reactor)� ClientFactory)�_QUEUED_SENTINEL� HTTPChannel� HTTPClient�Request)�Resource)� NOT_DONE_YETc @ sD e Zd ZdZdZdd� Zdd� Zdd� Zd d � Zd d � Z d d� Z dS )� ProxyClientz� Used by ProxyClientFactory to implement a simple web proxy. @ivar _finished: A flag which indicates whether or not the original request has been finished yet. Fc C sD || _ || _|| _d|v r|d= d|d< |�dd � || _|| _d S )Ns proxy-connections closes connections keep-alive)�father�command�rest�pop�headers�data��selfr r �versionr r r � r �3/usr/lib/python3/dist-packages/twisted/web/proxy.py�__init__) s zProxyClient.__init__c C sJ | � | j| j� | j�� D ] \}}| �||� q | �� | j�| j � d S �N) � sendCommandr r r �items� sendHeader� endHeaders� transport�writer )r �header�valuer r r �connectionMade4 s zProxyClient.connectionMadec C s | j �t|�|� d S r )r �setResponseCode�int)r r �code�messager r r � handleStatus; s zProxyClient.handleStatusc C s6 |� � dv r| jj�||g� d S | jj�||� d S )N)s servers dates content-type)�lowerr �responseHeaders� setRawHeaders� addRawHeader)r �keyr" r r r � handleHeader> s zProxyClient.handleHeaderc C s | j �|� d S r )r r )r �bufferr r r �handleResponsePartH s z ProxyClient.handleResponsePartc C s( | j sd| _ | j�� | j�� dS dS )z� Finish the original request, indicating that the response has been completely written to it, and disconnect the outgoing transport. TN)� _finishedr �finishr �loseConnection)r r r r �handleResponseEndK s �z ProxyClient.handleResponseEndN) �__name__� __module__� __qualname__�__doc__r1 r r# r( r. r0 r4 r r r r r s r c @ s, e Zd ZdZeZdd� Zdd� Zdd� ZdS ) �ProxyClientFactoryz? Used by ProxyRequest to implement a simple web proxy. c C s( || _ || _|| _|| _|| _|| _d S r )r r r r r r r r r r r ^ s zProxyClientFactory.__init__c C s | � | j| j| j| j| j| j�S r )�protocolr r r r r r )r �addrr r r � buildProtocolf s �z ProxyClientFactory.buildProtocolc C s8 | j �dd� | j j�dd� | j �d� | j �� dS )zh Report a connection failure in a response to the incoming request as an error. i� s Gateway errors Content-Types text/htmls <H1>Could not connect</H1>N)r r$ r* r, r r2 )r � connector�reasonr r r �clientConnectionFailedk s z)ProxyClientFactory.clientConnectionFailedN) r5 r6 r7 r8 r r: r r< r? r r r r r9 V s r9 c @ s6 e Zd ZdZdeiZddiZeefdd�Z dd� Z dS ) � ProxyRequestz� Used by Proxy to implement a simple web proxy. @ivar reactor: the reactor used to create connections. @type reactor: object providing L{twisted.internet.interfaces.IReactorTCP} s http�P c C � t �| ||� || _d S r �r r r �r �channel�queuedr r r r r � � zProxyRequest.__init__c C s� t | j�}|d }|d �d�}| j| }d|v r$|�d�\}}t|�}td|dd � �}|s4|d }| j| }| �� � � }d|vrJ|� d�|d< | j � dd� | j � � }|| j|| j||| �} | j�||| � d S ) Nr � �ascii�:)� rK � � /� host)r �uri�decode�ports�splitr% r � protocols� getAllHeaders�copy�encode�content�seek�read�method� clientprotor � connectTCP) r �parsedr: �host�portr �class_r �s� clientFactoryr r r �process� s$ zProxyRequest.processN) r5 r6 r7 r8 r9 rS rQ r r r rc r r r r r@ v s r@ c @ � e Zd ZdZeZdS )�Proxyao This class implements a simple web proxy. Since it inherits from L{twisted.web.http.HTTPChannel}, to use it you should do something like this:: from twisted.web import http f = http.HTTPFactory() f.protocol = Proxy Make the HTTPFactory a listener on a port as per usual, and you have a fully-functioning web proxy! N)r5 r6 r7 r8 r@ �requestFactoryr r r r re � s re c @ s* e Zd ZdZeZeefdd�Zdd� Z dS )�ReverseProxyRequestal Used by ReverseProxy to implement a simple reverse proxy. @ivar proxyClientFactoryClass: a proxy client factory class, used to create new connections. @type proxyClientFactoryClass: L{ClientFactory} @ivar reactor: the reactor used to create connections. @type reactor: object providing L{twisted.internet.interfaces.IReactorTCP} c C rB r rC rD r r r r � rG z ReverseProxyRequest.__init__c C sZ | j �d| jj�d�g� | �| j| j| j| � � | j � � | �}| j � | jj| jj|� dS )z� Handle this request by connecting to the proxied server and forwarding it there, then forwarding the response back as the response to this request. rN rI N)�requestHeadersr+ �factoryr^ rV �proxyClientFactoryClassrZ rO r[ rT rW rY r r\ r_ )r rb r r r rc � s � zReverseProxyRequest.processN) r5 r6 r7 r8 r9 rj r r r rc r r r r rg � s rg c @ rd )� ReverseProxyzo Implements a simple reverse proxy. For details of usage, see the file examples/reverse-proxy.py. N)r5 r6 r7 r8 rg rf r r r r rk � s rk c @ s0 e Zd ZdZeZefdd�Zdd� Zdd� Z dS ) �ReverseProxyResourcea� Resource that renders the results gotten from another server Put this resource in the tree to cause everything below it to be relayed to a different server. @ivar proxyClientFactoryClass: a proxy client factory class, used to create new connections. @type proxyClientFactoryClass: L{ClientFactory} @ivar reactor: the reactor used to create connections. @type reactor: object providing L{twisted.internet.interfaces.IReactorTCP} c C s& t �| � || _|| _|| _|| _dS )aU @param host: the host of the web server to proxy. @type host: C{str} @param port: the port of the web server to proxy. @type port: C{port} @param path: the base path to fetch data from. Note that you shouldn't put any trailing slashes in it, it will be added automatically in request. For example, if you put B{/foo}, a request on B{/bar} will be proxied to B{/foo/bar}. Any required encoding of special characters (such as " " or "/") should have been done already. @type path: C{bytes} N)r r r^ r_ �pathr )r r^ r_ rm r r r r r � s z ReverseProxyResource.__init__c C s, t | j| j| jd t|dd��d� | j�S )z� Create and return a proxy resource with the same proxy configuration as this one, except that its path also contains the segment given by C{path} at the end. rM rK )�safezutf-8)rl r^ r_ rm �urlquoterV r )r rm �requestr r r �getChild s �z ReverseProxyResource.getChildc C s� | j dkr | j}nd| j| j f }|j�d|�d�g� |j�dd� t|j�d }|r4| j d | }n| j }| � |j ||j |� � |j�� |�}| j�| j| j |� tS )zJ Render a request by forwarding it to the proxied server. rA z%s:%drN rI r � � ?)r_ r^ rh r+ rV rW rX r rO rm rj rZ r[ rT rY r r\ r )r rp r^ �qsr rb r r r �render s& �zReverseProxyResource.renderN) r5 r6 r7 r8 r9 rj r r rq ru r r r r rl � s rl N)r8 � urllib.parser ro r r �twisted.internetr �twisted.internet.protocolr �twisted.web.httpr r r r �twisted.web.resourcer �twisted.web.serverr r r9 r@ re rg rk rl r r r r �<module> s 7 $$
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