631 lines
22 KiB
Python
631 lines
22 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Copyright (C) 2026 tmwgsicp
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# Licensed under the GNU Affero General Public License v3.0
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# See LICENSE file in the project root for full license text.
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# SPDX-License-Identifier: AGPL-3.0-only
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"""
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辅助函数模块
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提供各种工具函数
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"""
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import re
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from typing import Dict, Optional
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from urllib.parse import urlparse, parse_qs
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def html_to_text(html: str) -> str:
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"""将 HTML 转为可读纯文本"""
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import html as html_module
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text = re.sub(r'<br\s*/?\s*>', '\n', html, flags=re.IGNORECASE)
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text = re.sub(r'</(?:p|div|section|h[1-6]|tr|li|blockquote)>', '\n', text, flags=re.IGNORECASE)
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text = re.sub(r'<hr[^>]*>', '\n---\n', text, flags=re.IGNORECASE)
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text = re.sub(r'<[^>]+>', '', text)
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text = html_module.unescape(text)
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text = re.sub(r'[ \t]+', ' ', text)
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text = re.sub(r'\n{3,}', '\n\n', text)
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return text.strip()
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def parse_article_url(url: str) -> Optional[Dict[str, str]]:
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"""
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解析微信文章URL，提取参数
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Args:
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url: 微信文章URL
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Returns:
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包含__biz, mid, idx, sn的字典，如果解析失败返回None
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"""
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try:
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# 确保是微信文章URL
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if not url or 'mp.weixin.qq.com/s' not in url:
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return None
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parsed = urlparse(str(url)) # 确保url是字符串
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params = parse_qs(parsed.query)
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__biz = params.get('__biz', [''])[0]
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mid = params.get('mid', [''])[0]
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idx = params.get('idx', [''])[0]
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sn = params.get('sn', [''])[0]
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# 必须有这4个参数才返回
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if not all([__biz, mid, idx, sn]):
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return None
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return {
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'__biz': __biz,
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'mid': mid,
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'idx': idx,
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'sn': sn
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}
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except Exception:
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return None
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def get_item_show_type(html: str) -> Optional[str]:
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"""提取 item_show_type 值"""
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m = re.search(r"window\.item_show_type\s*=\s*'(\d+)'", html)
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return m.group(1) if m else None
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def is_image_text_message(html: str) -> bool:
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"""检测是否为图文消息（item_show_type=8，类似小红书多图+文字）"""
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return get_item_show_type(html) == '8'
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def is_short_content_message(html: str) -> bool:
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"""检测是否为短内容/转发消息（item_show_type=10，纯文字无 js_content div）"""
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return get_item_show_type(html) == '10'
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def is_audio_message(html: str) -> bool:
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"""
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Detect audio articles (voice messages embedded via mpvoice / mp-common-mpaudio).
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检测是否为音频文章（包含 mpvoice 标签或音频播放器组件）。
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"""
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return ('voice_encode_fileid' in html or
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'<mpvoice' in html or
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'mp-common-mpaudio' in html or
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'js_editor_audio' in html)
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def _extract_image_text_content(html: str) -> Dict:
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"""
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提取图文消息的内容（item_show_type=8）
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图文消息的结构与普通文章完全不同：
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- 图片在 picture_page_info_list 的 JsDecode() 中
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- 文字在 meta description 或 content_desc 中
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- 没有 #js_content div
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"""
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import html as html_module
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# 提取图片 URL（从 picture_page_info_list 中的 cdn_url）
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# 页面中有两种格式:
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# 1. picture_page_info_list: [ { cdn_url: JsDecode('...'), ... } ] (带JsDecode)
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# 2. picture_page_info_list = [ { width:..., height:..., cdn_url: '...' } ] (简单格式)
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# 每个 item 中第一个 cdn_url 是主图，watermark_info 内的是水印，需要跳过
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images = []
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# 优先使用简单格式（第二种），更易解析且包含所有图片
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simple_list_pos = html.find('picture_page_info_list = [')
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if simple_list_pos >= 0:
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bracket_start = html.find('[', simple_list_pos)
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depth = 0
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end = bracket_start
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for end in range(bracket_start, min(bracket_start + 20000, len(html))):
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if html[end] == '[':
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depth += 1
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elif html[end] == ']':
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depth -= 1
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if depth == 0:
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break
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block = html[bracket_start:end + 1]
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# 按顶层 { 分割，每个 item 取第一个 cdn_url（主图）
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items = re.split(r'\n\s{4,10}\{', block)
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for item in items:
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m = re.search(r"cdn_url:\s*'([^']+)'", item)
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if m:
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url = m.group(1)
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if url not in images and ('mmbiz.qpic.cn' in url or 'mmbiz.qlogo.cn' in url):
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images.append(url)
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# 降级: 使用 JsDecode 格式
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if not images:
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jsdecode_list_match = re.search(
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r'picture_page_info_list:\s*\[', html
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)
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if jsdecode_list_match:
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block_start = jsdecode_list_match.end() - 1
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depth = 0
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end = block_start
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for end in range(block_start, min(block_start + 20000, len(html))):
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if html[end] == '[':
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depth += 1
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elif html[end] == ']':
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depth -= 1
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if depth == 0:
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break
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block = html[block_start:end + 1]
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# 按顶层 { 分割
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items = re.split(r'\n\s{10,30}\{(?=\s*\n\s*cdn_url)', block)
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for item in items:
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m = re.search(r"cdn_url:\s*JsDecode\('([^']+)'\)", item)
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if m:
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url = m.group(1).replace('\\x26amp;', '&').replace('\\x26', '&')
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if url not in images and ('mmbiz.qpic.cn' in url or 'mmbiz.qlogo.cn' in url):
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images.append(url)
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# 提取文字描述
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desc = ''
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# 方法1: meta description
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desc_match = re.search(r'<meta\s+name="description"\s+content="([^"]*)"', html)
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if desc_match:
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desc = desc_match.group(1)
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# 处理 \x26 编码（微信的双重编码：\x26lt; -> < -> <）
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desc = re.sub(r'\\x([0-9a-fA-F]{2})', lambda m: chr(int(m.group(1), 16)), desc)
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desc = html_module.unescape(desc)
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# 二次 unescape 处理双重编码
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desc = html_module.unescape(desc)
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# 清理 HTML 标签残留
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desc = re.sub(r'<[^>]+>', '', desc)
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desc = desc.replace('\\x0a', '\n').replace('\\n', '\n')
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# 方法2: content_desc
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if not desc:
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desc_match2 = re.search(r"content_desc:\s*JsDecode\('([^']*)'\)", html)
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if desc_match2:
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desc = desc_match2.group(1)
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desc = html_module.unescape(desc)
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# 构建 HTML 内容：竖向画廊 + 文字（RSS 兼容）
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html_parts = []
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# 竖向画廊：每张图限宽，紧凑排列，兼容主流 RSS 阅读器
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if images:
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gallery_imgs = []
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for i, img_url in enumerate(images):
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gallery_imgs.append(
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f'<p style="text-align:center;margin:0 0 6px">'
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f'<img src="{img_url}" data-src="{img_url}" '
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f'style="max-width:480px;width:100%;height:auto;border-radius:4px" />'
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f'</p>'
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)
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gallery_imgs.append(
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f'<p style="text-align:center;color:#999;font-size:12px;margin:4px 0 0">'
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f'{len(images)} images'
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f'</p>'
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)
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html_parts.append('\n'.join(gallery_imgs))
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# 文字描述区域
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if desc:
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text_lines = []
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for line in desc.split('\n'):
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line = line.strip()
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if line:
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text_lines.append(
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f'<p style="margin:0 0 8px;line-height:1.8;font-size:15px;color:#333">{line}</p>'
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)
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html_parts.append('\n'.join(text_lines))
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content = '\n'.join(html_parts)
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plain_content = desc if desc else ''
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return {
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'content': content,
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'plain_content': plain_content,
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'images': images,
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}
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def _jsdecode_unescape(s: str) -> str:
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"""Unescape JsDecode \\xNN sequences and HTML entities."""
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import html as html_module
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s = re.sub(r'\\x([0-9a-fA-F]{2})', lambda m: chr(int(m.group(1), 16)), s)
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s = html_module.unescape(s)
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s = html_module.unescape(s)
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return s
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def _extract_short_content(html: str) -> Dict:
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"""
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Extract content from item_show_type=10 (short posts / reposts).
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Type-10 articles have no js_content div; text and metadata are inside
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JsDecode() calls in <script> tags.
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"""
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import html as html_module
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# content / content_noencode (prefer content_noencode for unescaped text)
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text = ''
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for key in ('content_noencode', 'content'):
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m = re.search(rf"{key}:\s*JsDecode\('([^']*)'\)", html)
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if m and len(m.group(1)) > 10:
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text = _jsdecode_unescape(m.group(1))
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break
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# Cover / head image
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images = []
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img_m = re.search(r"round_head_img:\s*JsDecode\('([^']+)'\)", html)
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if img_m:
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img_url = _jsdecode_unescape(img_m.group(1))
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if 'mmbiz.qpic.cn' in img_url or 'wx.qlogo.cn' in img_url:
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images.append(img_url)
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# Build HTML: simple paragraphs
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html_parts = []
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if text:
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for line in text.replace('\\x0a', '\n').replace('\\n', '\n').split('\n'):
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line = line.strip()
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if line:
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safe = html_module.escape(line)
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html_parts.append(
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f'<p style="margin:0 0 8px;line-height:1.8;font-size:15px;color:#333">{safe}</p>'
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)
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content = '\n'.join(html_parts)
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plain_content = text.replace('\\x0a', '\n').replace('\\n', '\n') if text else ''
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return {
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'content': content,
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'plain_content': plain_content,
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'images': images,
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}
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def _extract_audio_content(html: str) -> Dict:
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"""
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Extract audio content from WeChat voice articles.
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音频文章使用 mpvoice / mp-common-mpaudio 标签嵌入语音，
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通过 voice_encode_fileid 构造下载链接。
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Also extracts any surrounding text content from js_content.
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"""
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import html as html_module
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from bs4 import BeautifulSoup
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audio_items = []
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# Pattern 1: <mpvoice voice_encode_fileid="..." name="..." .../>
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for m in re.finditer(
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r'<mpvoice[^>]*voice_encode_fileid=["\']([^"\']+)["\'][^>]*/?>',
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html, re.IGNORECASE
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):
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fileid = m.group(1)
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name_m = re.search(r'name=["\']([^"\']*)["\']', m.group(0))
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name = html_module.unescape(name_m.group(1)) if name_m else ''
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play_length_m = re.search(r'play_length=["\'](\d+)["\']', m.group(0))
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duration = int(play_length_m.group(1)) if play_length_m else 0
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audio_url = f"https://res.wx.qq.com/voice/getvoice?mediaid={fileid}"
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audio_items.append({'name': name, 'url': audio_url, 'duration': duration})
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# Pattern 2: mp-common-mpaudio with voice_encode_fileid in data or attributes
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if not audio_items:
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for m in re.finditer(
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r'<mp-common-mpaudio[^>]*voice_encode_fileid=["\']([^"\']+)["\'][^>]*>',
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html, re.IGNORECASE
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):
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fileid = m.group(1)
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name_m = re.search(r'name=["\']([^"\']*)["\']', m.group(0))
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name = html_module.unescape(name_m.group(1)) if name_m else ''
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play_length_m = re.search(r'play_length=["\'](\d+)["\']', m.group(0))
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duration = int(play_length_m.group(1)) if play_length_m else 0
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audio_url = f"https://res.wx.qq.com/voice/getvoice?mediaid={fileid}"
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audio_items.append({'name': name, 'url': audio_url, 'duration': duration})
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# Build HTML content
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html_parts = []
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# Extract surrounding text from js_content (some audio articles have text too)
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text_content = ''
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js_match = re.search(
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r'<div[^>]*id=["\']js_content["\'][^>]*>([\s\S]*?)</div>\s*(?:<script|<div[^>]*class=["\']rich_media_tool)',
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html, re.IGNORECASE
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)
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if js_match:
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try:
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soup = BeautifulSoup(js_match.group(1), 'html.parser')
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for tag in soup.find_all(['mpvoice', 'mp-common-mpaudio']):
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tag.decompose()
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text_content = soup.get_text(separator='\n', strip=True)
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except Exception:
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pass
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if text_content:
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for line in text_content.split('\n'):
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line = line.strip()
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if line:
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html_parts.append(f'<p style="margin:0 0 8px;line-height:1.8">{html_module.escape(line)}</p>')
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for i, audio in enumerate(audio_items):
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dur_str = ''
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if audio['duration'] > 0:
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minutes = audio['duration'] // 60
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seconds = audio['duration'] % 60
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dur_str = f' ({minutes}:{seconds:02d})'
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display_name = audio['name'] or f'Audio {i + 1}'
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html_parts.append(
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f'<div style="margin:12px 0;padding:12px 16px;background:#f6f6f6;border-radius:8px">'
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f'<p style="margin:0 0 4px;font-size:15px;font-weight:500">'
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f'{html_module.escape(display_name)}{dur_str}</p>'
|
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f'<a href="{audio["url"]}" style="color:#1890ff;font-size:14px">'
|
||
f'[Play Audio / Click to Listen]</a>'
|
||
f'</div>'
|
||
)
|
||
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content = '\n'.join(html_parts) if html_parts else ''
|
||
|
||
plain_parts = []
|
||
if text_content:
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||
plain_parts.append(text_content)
|
||
for i, audio in enumerate(audio_items):
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display_name = audio['name'] or f'Audio {i + 1}'
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plain_parts.append(f"[Audio] {display_name} - {audio['url']}")
|
||
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||
return {
|
||
'content': content,
|
||
'plain_content': '\n'.join(plain_parts),
|
||
'images': [],
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||
'audios': audio_items,
|
||
}
|
||
|
||
|
||
def extract_article_info(html: str, params: Optional[Dict] = None) -> Dict:
|
||
"""
|
||
从HTML中提取文章信息
|
||
|
||
Args:
|
||
html: 文章HTML内容
|
||
params: URL参数（可选，用于返回__biz等信息）
|
||
|
||
Returns:
|
||
文章信息字典
|
||
"""
|
||
|
||
title = ''
|
||
# 图文消息的标题通常在 window.msg_title 中
|
||
title_match = (
|
||
re.search(r'<h1[^>]*class=[^>]*rich_media_title[^>]*>([\s\S]*?)</h1>', html, re.IGNORECASE) or
|
||
re.search(r'<h2[^>]*class=[^>]*rich_media_title[^>]*>([\s\S]*?)</h2>', html, re.IGNORECASE) or
|
||
re.search(r"var\s+msg_title\s*=\s*'([^']+)'\.html\(false\)", html) or
|
||
re.search(r"window\.msg_title\s*=\s*window\.title\s*=\s*'([^']*)'", html) or
|
||
re.search(r'<meta\s+property="og:title"\s+content="([^"]+)"', html) or
|
||
re.search(r"msg_title:\s*JsDecode\('([^']+)'\)", html)
|
||
)
|
||
|
||
if title_match:
|
||
title = title_match.group(1)
|
||
title = _jsdecode_unescape(title)
|
||
title = re.sub(r'<[^>]+>', '', title)
|
||
title = title.replace('"', '"').replace('&', '&').strip()
|
||
|
||
author = ''
|
||
author_match = (
|
||
re.search(r'<a[^>]*id="js_name"[^>]*>([\s\S]*?)</a>', html, re.IGNORECASE) or
|
||
re.search(r'var\s+nickname\s*=\s*"([^"]+)"', html) or
|
||
re.search(r'<meta\s+property="og:article:author"\s+content="([^"]+)"', html) or
|
||
re.search(r'<a[^>]*class=[^>]*rich_media_meta_nickname[^>]*>([^<]+)</a>', html, re.IGNORECASE)
|
||
)
|
||
|
||
if author_match:
|
||
author = author_match.group(1)
|
||
author = re.sub(r'<[^>]+>', '', author).strip()
|
||
|
||
publish_time = 0
|
||
time_match = (
|
||
re.search(r'var\s+publish_time\s*=\s*"(\d+)"', html) or
|
||
re.search(r'var\s+ct\s*=\s*"(\d+)"', html) or
|
||
re.search(r"var\s+ct\s*=\s*'(\d+)'", html) or
|
||
re.search(r'<em[^>]*id="publish_time"[^>]*>([^<]+)</em>', html)
|
||
)
|
||
|
||
if time_match:
|
||
try:
|
||
publish_time = int(time_match.group(1))
|
||
except (ValueError, TypeError):
|
||
pass
|
||
|
||
# 检测特殊内容类型
|
||
if is_image_text_message(html):
|
||
img_text_data = _extract_image_text_content(html)
|
||
content = img_text_data['content']
|
||
images = img_text_data['images']
|
||
plain_content = img_text_data['plain_content']
|
||
elif is_short_content_message(html):
|
||
short_data = _extract_short_content(html)
|
||
content = short_data['content']
|
||
images = short_data['images']
|
||
plain_content = short_data['plain_content']
|
||
elif is_audio_message(html):
|
||
audio_data = _extract_audio_content(html)
|
||
content = audio_data['content']
|
||
images = audio_data['images']
|
||
plain_content = audio_data['plain_content']
|
||
else:
|
||
content = ''
|
||
images = []
|
||
|
||
# 方法1: 匹配 id="js_content"
|
||
content_match = re.search(r'<div[^>]*id="js_content"[^>]*>([\s\S]*?)<script[^>]*>[\s\S]*?</script>', html, re.IGNORECASE)
|
||
|
||
if not content_match:
|
||
# 方法2: 匹配 class包含rich_media_content
|
||
content_match = re.search(r'<div[^>]*class="[^"]*rich_media_content[^"]*"[^>]*>([\s\S]*?)</div>', html, re.IGNORECASE)
|
||
|
||
if content_match and content_match.group(1):
|
||
content = content_match.group(1).strip()
|
||
else:
|
||
# 方法3: 手动截取
|
||
js_content_pos = html.find('id="js_content"')
|
||
if js_content_pos > 0:
|
||
start = html.find('>', js_content_pos) + 1
|
||
script_pos = html.find('<script', start)
|
||
if script_pos > start:
|
||
content = html[start:script_pos].strip()
|
||
if content:
|
||
# 提取data-src属性
|
||
img_regex = re.compile(r'<img[^>]+data-src="([^"]+)"')
|
||
for img_match in img_regex.finditer(content):
|
||
img_url = img_match.group(1)
|
||
if img_url not in images:
|
||
images.append(img_url)
|
||
|
||
# 提取src属性
|
||
img_regex2 = re.compile(r'<img[^>]+src="([^"]+)"')
|
||
for img_match in img_regex2.finditer(content):
|
||
img_url = img_match.group(1)
|
||
if not img_url.startswith('data:') and img_url not in images:
|
||
images.append(img_url)
|
||
|
||
content = re.sub(r'<script[^>]*>[\s\S]*?</script>', '', content, flags=re.IGNORECASE)
|
||
plain_content = html_to_text(content) if content else ''
|
||
|
||
__biz = params.get('__biz', 'unknown') if params else 'unknown'
|
||
publish_time_str = ''
|
||
if publish_time > 0:
|
||
from datetime import datetime
|
||
dt = datetime.fromtimestamp(publish_time)
|
||
publish_time_str = dt.strftime('%Y-%m-%d %H:%M:%S')
|
||
|
||
return {
|
||
'title': title,
|
||
'content': content,
|
||
'plain_content': plain_content,
|
||
'images': images,
|
||
'author': author,
|
||
'publish_time': publish_time,
|
||
'publish_time_str': publish_time_str,
|
||
'__biz': __biz
|
||
}
|
||
|
||
def has_article_content(html: str) -> bool:
|
||
"""
|
||
Check whether the fetched HTML likely contains article content.
|
||
Different WeChat account types use different content containers.
|
||
|
||
Must match actual HTML elements (id/class attributes), not random JS strings,
|
||
to avoid false positives on WeChat verification pages (~1.9MB) that contain
|
||
"js_content" references in their JavaScript code.
|
||
"""
|
||
element_markers = [
|
||
'id="js_content"',
|
||
'class="rich_media_content',
|
||
'class="rich_media_area_primary',
|
||
'id="page-content"',
|
||
'id="page_content"',
|
||
]
|
||
if any(marker in html for marker in element_markers):
|
||
return True
|
||
if is_image_text_message(html) or is_short_content_message(html) or is_audio_message(html):
|
||
return True
|
||
return False
|
||
|
||
|
||
def get_client_ip(request) -> str:
|
||
"""
|
||
Extract real client IP from request, respecting reverse proxy headers.
|
||
Priority: X-Forwarded-For > X-Real-IP > request.client.host
|
||
"""
|
||
forwarded_for = request.headers.get("x-forwarded-for", "")
|
||
if forwarded_for:
|
||
return forwarded_for.split(",")[0].strip()
|
||
real_ip = request.headers.get("x-real-ip", "")
|
||
if real_ip:
|
||
return real_ip.strip()
|
||
return request.client.host if request.client else "unknown"
|
||
|
||
|
||
def is_article_deleted(html: str) -> bool:
|
||
"""检查文章是否被删除"""
|
||
return '已删除' in html or 'deleted' in html.lower()
|
||
|
||
|
||
def is_article_unavailable(html: str) -> bool:
|
||
"""
|
||
Check if the article is permanently unavailable (deleted / censored / restricted).
|
||
检查文章是否永久不可获取（删除/违规/限制）。
|
||
"""
|
||
return get_unavailable_reason(html) is not None
|
||
|
||
|
||
def get_unavailable_reason(html: str) -> Optional[str]:
|
||
"""
|
||
Return human-readable reason if article is permanently unavailable, else None.
|
||
返回文章不可用的原因，如果文章正常则返回 None。
|
||
"""
|
||
markers = [
|
||
("该内容已被发布者删除", "已被发布者删除"),
|
||
("内容已删除", "已被发布者删除"),
|
||
("此内容因违规无法查看", "因违规无法查看"),
|
||
("涉嫌违反相关法律法规和政策", "涉嫌违规被限制"),
|
||
("此内容发送失败无法查看", "发送失败无法查看"),
|
||
("该内容暂时无法查看", "暂时无法查看"),
|
||
("根据作者隐私设置，无法查看该内容", "作者隐私设置不可见"),
|
||
("接相关投诉，此内容违反", "因投诉违规被限制"),
|
||
("该文章已被第三方辟谣", "已被第三方辟谣"),
|
||
]
|
||
for keyword, reason in markers:
|
||
if keyword in html:
|
||
return reason
|
||
return None
|
||
|
||
|
||
def is_need_verification(html: str) -> bool:
|
||
"""检查是否需要验证"""
|
||
return ('verify' in html.lower() or
|
||
'验证' in html or
|
||
'环境异常' in html)
|
||
|
||
def is_login_required(html: str) -> bool:
|
||
"""检查是否需要登录"""
|
||
return '请登录' in html or 'login' in html.lower()
|
||
|
||
def time_str_to_microseconds(time_str: str) -> int:
|
||
"""
|
||
将时间字符串转换为微秒
|
||
|
||
支持格式：
|
||
- "5s" -> 5秒
|
||
- "1m30s" -> 1分30秒
|
||
- "1h30m" -> 1小时30分
|
||
- "00:01:30" -> 1分30秒
|
||
- 直接数字 -> 微秒
|
||
"""
|
||
if isinstance(time_str, int):
|
||
return time_str
|
||
|
||
# 尝试解析为整数（已经是微秒）
|
||
try:
|
||
return int(time_str)
|
||
except ValueError:
|
||
pass
|
||
|
||
# 解析时间字符串
|
||
total_seconds = 0
|
||
|
||
# 格式：HH:MM:SS 或 MM:SS
|
||
if ':' in time_str:
|
||
parts = time_str.split(':')
|
||
if len(parts) == 3:
|
||
total_seconds = int(parts[0]) * 3600 + int(parts[1]) * 60 + int(parts[2])
|
||
elif len(parts) == 2:
|
||
total_seconds = int(parts[0]) * 60 + int(parts[1])
|
||
else:
|
||
# 格式：1h30m45s
|
||
hours = re.search(r'(\d+)h', time_str)
|
||
minutes = re.search(r'(\d+)m', time_str)
|
||
seconds = re.search(r'(\d+)s', time_str)
|
||
|
||
if hours:
|
||
total_seconds += int(hours.group(1)) * 3600
|
||
if minutes:
|
||
total_seconds += int(minutes.group(1)) * 60
|
||
if seconds:
|
||
total_seconds += int(seconds.group(1))
|
||
|
||
return total_seconds * 1000000 # 转换为微秒
|
||
|
||
|