64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
# -*- coding: utf-8 -*-
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# @Author : relakkes@gmail.com
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# @Time : 2023/12/2 11:18
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# @Desc : 爬虫 IP 获取实现
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# @Url : 快代理HTTP实现，官方文档：https://www.kuaidaili.com/?ref=ldwkjqipvz6c
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import json
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from abc import ABC, abstractmethod
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from typing import List
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import config
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from cache.abs_cache import AbstractCache
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from cache.cache_factory import CacheFactory
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from tools import utils
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from .types import IpInfoModel
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class IpGetError(Exception):
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""" ip get error"""
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class ProxyProvider(ABC):
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@abstractmethod
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async def get_proxies(self, num: int) -> List[IpInfoModel]:
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"""
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获取 IP 的抽象方法，不同的 HTTP 代理商需要实现该方法
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:param num: 提取的 IP 数量
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:return:
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"""
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pass
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class IpCache:
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def __init__(self):
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self.cache_client: AbstractCache = CacheFactory.create_cache(cache_type=config.CACHE_TYPE_MEMORY)
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def set_ip(self, ip_key: str, ip_value_info: str, ex: int):
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"""
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设置IP并带有过期时间，到期之后由 redis 负责删除
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:param ip_key:
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:param ip_value_info:
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:param ex:
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:return:
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"""
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self.cache_client.set(key=ip_key, value=ip_value_info, expire_time=ex)
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def load_all_ip(self, proxy_brand_name: str) -> List[IpInfoModel]:
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"""
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从 redis 中加载所有还未过期的 IP 信息
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:param proxy_brand_name: 代理商名称
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:return:
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"""
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all_ip_list: List[IpInfoModel] = []
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all_ip_keys: List[str] = self.cache_client.keys(pattern=f"{proxy_brand_name}_*")
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try:
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for ip_key in all_ip_keys:
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ip_value = self.cache_client.get(ip_key)
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if not ip_value:
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continue
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all_ip_list.append(IpInfoModel(**json.loads(ip_value)))
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except Exception as e:
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utils.logger.error("[IpCache.load_all_ip] get ip err from redis db", e)
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return all_ip_list
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