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robotparser.cpython-38.pyc
U e5d�$ � @ s\ d Z ddlZddlZddlZdgZe�dd�ZG dd� d�ZG dd� d�Z G d d � d �Z dS ) a% robotparser.py Copyright (C) 2000 Bastian Kleineidam You can choose between two licenses when using this package: 1) GNU GPLv2 2) PSF license for Python 2.2 The robots.txt Exclusion Protocol is implemented as specified in http://www.robotstxt.org/norobots-rfc.txt � N�RobotFileParser� RequestRatezrequests secondsc @ sr e Zd ZdZd dd�Zdd� Zdd� Zd d � Zd d � Zd d� Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� ZdS ) r zs This class provides a set of methods to read, parse and answer questions about a single robots.txt file. � c C s2 g | _ g | _d | _d| _d| _| �|� d| _d S )NFr )�entries�sitemaps� default_entry� disallow_all� allow_all�set_url� last_checked��self�url� r �*/usr/lib64/python3.8/urllib/robotparser.py�__init__ s zRobotFileParser.__init__c C s | j S )z�Returns the time the robots.txt file was last fetched. This is useful for long-running web spiders that need to check for new robots.txt files periodically. )r �r r r r �mtime% s zRobotFileParser.mtimec C s ddl }|� � | _dS )zYSets the time the robots.txt file was last fetched to the current time. r N)�timer )r r r r r �modified. s zRobotFileParser.modifiedc C s& || _ tj�|�dd� \| _| _dS )z,Sets the URL referring to a robots.txt file.� � N)r �urllib�parse�urlparseZhost�pathr r r r r 6 s zRobotFileParser.set_urlc C s� zt j�| j�}W nR t jjk rd } z0|jdkr:d| _n|jdkrT|jdk rTd| _W 5 d}~X Y n X |� � }| � |� d�� � � dS )z4Reads the robots.txt URL and feeds it to the parser.)i� i� Ti� i� Nzutf-8) r ZrequestZurlopenr �errorZ HTTPError�coder r �readr �decode� splitlines)r �f�err�rawr r r r ; s zRobotFileParser.readc C s, d|j kr | jd kr(|| _n | j�|� d S �N�*)� useragentsr r �append)r �entryr r r � _add_entryH s zRobotFileParser._add_entryc C sP d}t � }| �� |D �] }|sP|dkr4t � }d}n |dkrP| �|� t � }d}|�d�}|dkrn|d|� }|�� }|s|q|�dd�}t|�dkr|d �� �� |d< tj � |d �� �|d< |d dkr�|dkr�| �|� t � }|j � |d � d}q|d dk�r.|dk�r6|j � t|d d �� d}q|d d k�rb|dk�r6|j � t|d d �� d}q|d d k�r�|dk�r6|d �� �� �r�t|d �|_d}q|d d k�r|dk�r6|d �d�}t|�dk�r|d �� �� �r|d �� �� �rtt|d �t|d ��|_d}q|d dkr| j� |d � q|dk�rL| �|� dS )z�Parse the input lines from a robots.txt file. We allow that a user-agent: line is not preceded by one or more blank lines. r r � �#N�:z user-agentZdisallowFZallowTz crawl-delayz request-rate�/Zsitemap)�Entryr r) �find�strip�split�len�lowerr r �unquoter& r' � rulelines�RuleLine�isdigit�int�delayr �req_rater )r �lines�stater( �line�iZnumbersr r r r Q sj � zRobotFileParser.parsec C s� | j r dS | jrdS | js dS tj�tj�|��}tj�dd|j|j |j |j f�}tj� |�}|sfd}| j D ] }|�|�rl|�|� S ql| jr�| j�|�S dS )z=using the parsed robots.txt decide if useragent can fetch urlFTr r- )r r r r r r r4 � urlunparser ZparamsZqueryZfragment�quoter � applies_to� allowancer )r � useragentr Z parsed_urlr( r r r � can_fetch� s* � zRobotFileParser.can_fetchc C s> | � � s d S | jD ]}|�|�r|j S q| jr:| jjS d S �N)r r rA r9 r �r rC r( r r r � crawl_delay� s zRobotFileParser.crawl_delayc C s> | � � s d S | jD ]}|�|�r|j S q| jr:| jjS d S rE )r r rA r: r rF r r r � request_rate� s z RobotFileParser.request_ratec C s | j s d S | j S rE )r r r r r � site_maps� s zRobotFileParser.site_mapsc C s, | j }| jd k r || jg }d�tt|��S )Nz )r r �join�map�str)r r r r r �__str__� s zRobotFileParser.__str__N)r )�__name__� __module__� __qualname__�__doc__r r r r r r) r rD rG rH rI rM r r r r r s I c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) r6 zoA rule line is a single "Allow:" (allowance==True) or "Disallow:" (allowance==False) followed by a path.c C s< |dkr|sd}t j�t j�|��}t j�|�| _|| _d S )Nr T)r r r? r r@ r rB )r r rB r r r r � s zRuleLine.__init__c C s | j dkp|�| j �S r$ )r � startswith)r �filenamer r r rA � s zRuleLine.applies_toc C s | j r dndd | j S )NZAllowZDisallowz: )rB r r r r r rM � s zRuleLine.__str__N)rN rO rP rQ r rA rM r r r r r6 � s r6 c @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd S ) r. z?An entry has one or more user-agents and zero or more rulelinesc C s g | _ g | _d | _d | _d S rE )r& r5 r9 r: r r r r r � s zEntry.__init__c C s� g }| j D ]}|�d|� �� q | jd k r<|�d| j� �� | jd k rf| j}|�d|j� d|j� �� |�tt| j �� d� |�S )Nz User-agent: z Crawl-delay: zRequest-rate: r- � ) r& r' r9 r: ZrequestsZseconds�extendrK rL r5 rJ )r Zret�agentZrater r r rM � s z Entry.__str__c C sF |� d�d �� }| jD ](}|dkr* dS |�� }||kr dS qdS )z2check if this entry applies to the specified agentr- r r% TF)r1 r3 r& )r rC rV r r r rA � s zEntry.applies_toc C s$ | j D ]}|�|�r|j S qdS )zZPreconditions: - our agent applies to this entry - filename is URL decodedT)r5 rA rB )r rS r= r r r rB s zEntry.allowanceN)rN rO rP rQ r rM rA rB r r r r r. � s r. ) rQ � collectionsZ urllib.parser Zurllib.request�__all__� namedtupler r r6 r. r r r r �<module> s B
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