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#!/usr/bin/env python
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'''
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Copyright (C) 2020, WAFW00F Developers.
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See the LICENSE file for copying permission.
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'''
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NAME = 'Yundun (Yundun)'
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def is_waf(self):
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# 定义用于检测是否存在特定 Web 应用防火墙（WAF）的方案列表。
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schemes = [
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# 检查响应头中的'Server'字段是否为'YUNDUN'。
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self.matchHeader(('Server', 'YUNDUN')),
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# 检查响应头中的'X-Cache'字段是否为'YUNDUN'。
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self.matchHeader(('X-Cache', 'YUNDUN')),
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# 检查 Cookie 是否以'yd_cookie='开头。
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self.matchCookie(r'^yd_cookie='),
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# 检查响应内容中是否包含'Blocked by YUNDUN Cloud WAF'。
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self.matchContent(r'Blocked by YUNDUN Cloud WAF'),
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# 检查响应内容中是否包含'yundun.com/yd[_-]http[_-]error/'。
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self.matchContent(r'yundun\.com/yd[-_]http[_-]error/'),
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# 检查响应内容中是否包含'www.yundun.com/'或者'www.yundun.com/static/js/fingerprint[数字].js'。
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self.matchContent(r'www\.yundun\.com/(static/js/fingerprint\d{1}?\.js)?')
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]
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# 如果方案列表中的任何一个条件为真，则认为检测到了 WAF。
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if any(i for i in schemes):
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return True
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else:
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return False
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