365 lines
12 KiB
Python
365 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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import base64
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import hashlib
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import ipaddress
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import logging
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import re
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import socket
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import time
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from typing import Tuple, Optional, Dict
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from urllib.parse import urlparse
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import requests
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import urllib3
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from urllib3.exceptions import MaxRetryError, ReadTimeoutError, ConnectTimeoutError
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from favicon_app.utils import header
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from favicon_app.utils.filetype import helpers, filetype
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# 禁用SSL警告
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urllib3.disable_warnings()
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logging.captureWarnings(True)
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# 配置日志
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logger = logging.getLogger(__name__)
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# 创建requests会话池
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requests_session = requests.Session()
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requests_session.max_redirects = 3
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requests_session.verify = False
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# 请求超时设置
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DEFAULT_TIMEOUT = 10
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DEFAULT_RETRIES = 2
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# 时间常量
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time_of_1_days = 1 * 24 * 60 * 60
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time_of_7_days = 7 * time_of_1_days
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# 存储失败的URL，值为缓存过期时间戳
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failed_urls: Dict[str, int] = dict()
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class Favicon:
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"""Favicon类，用于处理网站图标的获取和解析
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主要功能：
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- 解析URL，提取协议、域名和端口
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- 检查域名是否为内网地址
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- 获取网站图标URL和内容
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- 处理不同类型的图标路径
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Attributes:
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scheme: 协议类型(http/https)
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domain: 域名
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port: 端口号
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domain_md5: 域名的MD5哈希值
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icon_url: 图标URL
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path: 访问路径
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"""
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# 协议://域名:端口号, 域名md5值
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scheme: Optional[str] = None
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domain: Optional[str] = None
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port: Optional[int] = None
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domain_md5: Optional[str] = None
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icon_url: Optional[str] = None
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# 访问路径
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path: str = '/'
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def __init__(self, url: str):
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"""初始化Favicon对象
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Args:
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url: 要处理的URL字符串
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"""
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try:
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url = url.lower().strip()
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self._parse(url)
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# 如果域名解析失败，尝试添加协议前缀
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if not self.domain_md5 and ('.' in url):
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if url.startswith('//'):
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self._parse('http:' + url)
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elif not (url.startswith('https://') or url.startswith('http://')):
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self._parse('http://' + url)
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except Exception as e:
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logger.error('初始化错误: %s, URL: %s', str(e), url)
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def _parse(self, url: str):
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"""解析URL，提取协议、域名、路径和端口
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Args:
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url: 要解析的URL字符串
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"""
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try:
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_url = urlparse(url)
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self.scheme = _url.scheme
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self.domain = _url.hostname
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self.path = _url.path
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self.port = _url.port
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# 处理协议
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if self.scheme not in ['https', 'http']:
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if self.scheme:
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logger.warning('不支持的协议类型: %s', self.scheme)
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self.scheme = 'http'
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# 检查域名合法性
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if self.domain and not self._check_url(self.domain):
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self.domain = None
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# 生成域名MD5哈希值
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if self.domain:
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self.domain_md5 = hashlib.md5(self.domain.encode("utf-8")).hexdigest()
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except Exception as e:
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failed_url_cache(self.domain, time_of_1_days)
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self.scheme = None
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self.domain = None
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logger.error('URL解析错误: %s, URL: %s', str(e), url)
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def _get_icon_url(self, icon_path: str):
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"""根据图标路径生成完整的图标URL
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Args:
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icon_path: 图标路径
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"""
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if not icon_path or not self.domain or not self.scheme:
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self.icon_url = None
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return
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if icon_path.startswith(('https://', 'http://')):
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self.icon_url = icon_path
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elif icon_path.startswith('//'):
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self.icon_url = f"{self.scheme}:{icon_path}"
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elif icon_path.startswith('/'):
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self.icon_url = f"{self.scheme}://{self.domain}{icon_path}"
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elif icon_path.startswith('..'):
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clean_path = icon_path.replace('../', '')
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self.icon_url = f"{self.scheme}://{self.domain}/{clean_path}"
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elif icon_path.startswith('./'):
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self.icon_url = f"{self.scheme}://{self.domain}{icon_path[1:]}"
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elif icon_path.startswith('data:image'):
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self.icon_url = icon_path
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else:
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self.icon_url = f"{self.scheme}://{self.domain}/{icon_path}"
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def _get_icon_default(self):
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"""获取网站默认favicon.ico路径
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"""
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if self.domain and self.scheme:
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self.icon_url = f"{self.scheme}://{self.domain}/favicon.ico"
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else:
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self.icon_url = None
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def get_icon_url(self, icon_path: str, default: bool = False) -> Optional[str]:
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"""获取图标URL
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Args:
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icon_path: 图标路径
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default: 是否使用默认图标路径
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Returns:
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完整的图标URL
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"""
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if default:
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self._get_icon_default()
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else:
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self._get_icon_url(icon_path)
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return self.icon_url
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def get_icon_file(self, icon_path: str, default: bool = False) -> Tuple[Optional[bytes], Optional[str]]:
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"""获取图标文件内容和类型
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Args:
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icon_path: 图标路径
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default: 是否使用默认图标路径
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Returns:
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元组(图标内容, 内容类型)
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"""
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self.get_icon_url(icon_path, default)
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if not self.icon_url or not self.domain or '.' not in self.domain:
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return None, None
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_content, _ct = None, None
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try:
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# 处理base64编码的图片
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if self.icon_url.startswith('data:image') and 'base64,' in self.icon_url:
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data_uri = self.icon_url.split(',')
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if len(data_uri) == 2:
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_content = base64.b64decode(data_uri[-1])
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_ct = data_uri[0].split(';')[0].split(':')[-1]
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else:
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_content, _ct = self._req_get(self.icon_url, domain=self.domain)
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# 验证是否为图片
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# image/* application/x-ico
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# if _ct and ('image' in _ct or 'ico' in _ct or helpers.is_image(_content)):
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if _ct and _content and helpers.is_image(_content):
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# 检查文件大小
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if len(_content) > 5 * 1024 * 1024:
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logger.warning('图片过大: %d bytes, 域名: %s', len(_content), self.domain)
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return _content, filetype.guess_mime(_content) or _ct
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except Exception as e:
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logger.error('获取图标文件失败: %s, URL: %s', str(e), self.icon_url)
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return None, None
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def get_base_url(self) -> Optional[str]:
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"""获取网站基础URL
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Returns:
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网站基础URL
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"""
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if not self.domain or '.' not in self.domain:
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return None
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_url = f"{self.scheme}://{self.domain}"
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if self.port and self.port not in [80, 443]:
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_url += f":{self.port}"
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return _url
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def req_get(self) -> Optional[bytes]:
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"""获取网站首页内容
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Returns:
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网站首页HTML内容
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"""
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if not self.domain or '.' not in self.domain:
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return None
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_url = self.get_base_url()
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_content, _ct = self._req_get(_url, domain=self.domain)
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# 验证类型并检查大小
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if _ct and ('text' in _ct or 'html' in _ct or 'xml' in _ct):
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if _content and len(_content) > 30 * 1024 * 1024:
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logger.error('页面内容过大: %d bytes, URL: %s', len(_content), _url)
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return None
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return _content
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return None
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@staticmethod
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def _req_get(
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url: str,
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domain: str,
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retries: int = DEFAULT_RETRIES,
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timeout: int = DEFAULT_TIMEOUT
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) -> Tuple[Optional[bytes], Optional[str]]:
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"""发送HTTP GET请求获取内容
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Args:
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url: 请求URL
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retries: 重试次数
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timeout: 超时时间(秒)
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Returns:
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元组(内容, 内容类型)
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"""
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logger.info('发送请求: %s', url)
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retry_count = 0
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while retry_count <= retries:
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try:
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# 使用全局会话池
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req = requests_session.get(
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url,
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headers=header.get_header(),
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timeout=timeout,
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allow_redirects=True,
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verify=False
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)
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if req.ok:
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ct_type = req.headers.get('Content-Type')
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ct_length = req.headers.get('Content-Length')
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# 处理Content-Type
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if ct_type and ';' in ct_type:
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_cts = ct_type.split(';')
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if 'charset' in _cts[0]:
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ct_type = _cts[-1].strip()
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else:
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ct_type = _cts[0].strip()
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# 检查响应大小
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if ct_length and int(ct_length) > 10 * 1024 * 1024:
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logger.warning('响应过大: %d bytes, URL: %s', int(ct_length), url)
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return req.content, ct_type
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else:
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failed_url_cache(domain, time_of_7_days)
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logger.error('请求失败: %d, URL: %s', req.status_code, url)
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break
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except (ConnectTimeoutError, ReadTimeoutError) as e:
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retry_count += 1
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if retry_count > retries:
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logger.error('请求超时: %s, URL: %s', str(e), url)
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else:
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logger.warning('请求超时，正在重试(%d/%d): %s', retry_count, retries, url)
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continue
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except MaxRetryError as e:
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logger.error('重定向次数过多: %s, URL: %s', str(e), url)
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break
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except Exception as e:
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failed_url_cache(domain, time_of_7_days)
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logger.error('请求异常: %s, URL: %s', str(e), url)
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break
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return None, None
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@staticmethod
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def _check_url(domain: str) -> bool:
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"""检查域名是否合法且非内网地址
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Args:
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domain: 域名
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Returns:
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域名是否合法且非内网地址
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"""
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return Favicon.check_internal(domain) and _pattern_domain.match(domain)
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@staticmethod
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def check_internal(domain: str) -> bool:
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"""检查网址是否非内网地址
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Args:
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domain: 域名
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Returns:
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True: 非内网；False: 是内网/无法解析
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"""
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try:
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# 检查是否为IP地址
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if domain.replace('.', '').isdigit():
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return not ipaddress.ip_address(domain).is_private
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else:
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# 解析域名获取IP地址
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ips = socket.getaddrinfo(domain, None)
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for ip_info in ips:
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ip = ip_info[4][0]
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if '.' in ip:
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if not ipaddress.ip_address(ip).is_private:
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return True
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return False
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except Exception as e:
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failed_url_cache(domain, time_of_7_days)
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logger.error('解析域名出错: %s, 错误: %s', domain, str(e))
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return False
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# 域名验证正则表达式
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_pattern_domain = re.compile(
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r'[a-zA-Z0-9\u4E00-\u9FA5][-a-zA-Z0-9\u4E00-\u9FA5]{0,62}(\.[a-zA-Z0-9\u4E00-\u9FA5][-a-zA-Z0-9\u4E00-\u9FA5]{0,62})+\.?',
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re.I)
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def failed_url_cache(_domain: str, _time: int):
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if _domain:
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_current_time = int(time.time())
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if (not failed_urls.get(_domain)) or (_current_time <= failed_urls.get(_domain)):
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failed_urls[_domain] = _current_time + _time
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