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fix(v2.0.1): 修复反爬误判 + Wayback 兜底未触发两个 bug

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Bug 1: Wayback 兜底未触发 (search.py fetch_page)

- 根因: Cloudflare JS 质询页常返回 HTTP 200 (非 403), 主抓取 result 非 None

- _should_try_fallback 在 result 非 None 时直接返回 False, 跳过兜底

- 反爬检测在兜底判断之后执行, 错过兜底入口

- 修复: 反爬检测提前到兜底判断之前, anti_bot_detected=True 也触发 Wayback

- Wayback 结果重新做反爬检测 (防御性)

Bug 2: WAF 指纹库误判正常内容 (search.py WAF_FINGERPRINTS)

- 根因: 裸公司名 (cloudflare/akamai) 和宽泛词 (captcha/challenge/dd-) 做全文匹配

- DataCamp 文章引用 cloudflare.com 文档链接 -> 误判为 cloudflare WAF

- 'coding challenges' 正常内容 -> 误判为 generic 反爬

- Wayback 归档正文被误判, 兜底返回的有效内容被丢弃

- 修复: 移除裸公司名和宽泛词, 改用技术标识符 (cf-ray/incap_ses/bm_sz 等)

- 通用文案用完整短语 (please complete the captcha) 替代单词

- 增加 <title> 标签精准检测 (反爬页 title 是特征文案, 误判率极低)

- 新增 Anubis 反爬系统检测 (anubis_challenge/miserere)

真实测试验证 (search.metona.cn 实例):

- v2.0.0: --fetch 3 全部失败 (3 ERR: cloudflare/generic, Wayback 未触发)

- v2.0.1: --fetch 3 全部成功 (3 OK: 38100/93442/1945 chars, UA 轮换绕过 Cloudflare)

测试: 458 个全部通过 (新增 7 个测试覆盖修复行为)
This commit is contained in:
thzxx
2026-08-01 21:44:58 +08:00
parent 28ff7c0a48
commit d9a08716bc
7 changed files with 215 additions and 66 deletions
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tests/test_fetch_auto.py
+4 -1
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@@ -46,9 +46,12 @@ def test_blocked_page_checks_first_2000_chars():
v2.0.0 changed this to full-document scanning because large anti-bot
pages (e.g. Cloudflare challenges with big JS blobs) may place the
telltale keyword beyond the 2000-char boundary.
v2.0.1: 用完整短语 'please complete the captcha' 替代裸 'captcha'，
避免正常内容误判。
"""
padding = "x" * 2500
html = f"<html>{padding}captcha</html>"
html = f"<html>{padding}please complete the captcha</html>"
# v2.0.0: now detected (was: not detected)
assert _is_blocked_page(html)