All url DNS use 8.8.8.8
Browse files- dns_resolver.py +30 -32
dns_resolver.py
CHANGED
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@@ -9,53 +9,48 @@ class DnsManager:
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def __new__(cls, *args, **kwargs):
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if not cls._instance:
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cls._instance = super(DnsManager, cls).__new__(cls)
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return cls._instance
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def __init__(self, cache_ttl=600):
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# 避免单例模式下重复初始化
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if hasattr(self, '_initialized'):
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return
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self.cache_ttl = cache_ttl
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self.cache = {} #
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# 覆盖 Discord 机器人运行所需的所有关键域名
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self.target_hosts = [
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'discord.com',
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'gateway.discord.gg',
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'cdn.discordapp.com',
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'discordapp.com'
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]
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self.logger = logging.getLogger("DnsManager")
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self._initialized = True
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def _fetch_ip_from_http(self, hostname):
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"""通过 HTTPS (TCP 443) 绕过系统 UDP DNS 限制获取 IP"""
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try:
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# 使用 Google DNS API
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url = f"https://dns.google/resolve?name={hostname}&type=A"
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req = urllib.request.Request(url, headers={"Accept": "application/dns-json"})
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with urllib.request.urlopen(req, timeout=5) as response:
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data = json.loads(response.read().decode())
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if "Answer" in data:
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# 找到第一个 A 记录 (IPv4)
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for answer in data['Answer']:
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if answer['type'] == 1: # A
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return answer['data']
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except Exception as e:
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self.logger.warning(f"
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return None
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def get_ip(self, hostname):
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"""获取 IP
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current_time = time.time()
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-
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if hostname in self.cache:
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if current_time < self.cache[hostname]['expiry']:
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return self.cache[hostname]['ip']
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#
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new_ip = self._fetch_ip_from_http(hostname)
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if new_ip:
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self.cache[hostname] = {
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"ip": new_ip,
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@@ -64,32 +59,35 @@ class DnsManager:
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print(f"🔄 [DNS库] 动态解析成功: {hostname} -> {new_ip}")
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return new_ip
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#
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if hostname in self.cache:
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self.logger.warning(f"解析失败,正在使用 {hostname} 的过期缓存")
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return self.cache[hostname]['ip']
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# 最后的保底 hardcode IP (Discord 常用 IP)
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return "162.159.137.232"
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def patch_socket(self):
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"""
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original_getaddrinfo = socket.getaddrinfo
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def patched_getaddrinfo(*args, **kwargs):
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host = args[0]
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latest_ip = self.get_ip(host)
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# 强制返回 IPv4 地址族 (AF_INET),避免 IPv6 解析错误
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return [(socket.AF_INET, socket.SOCK_STREAM, 6, '', (latest_ip, port))]
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socket.getaddrinfo = patched_getaddrinfo
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print("💉 [DNS库] 全局
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# 导出实例
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dns_manager = DnsManager()
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def __new__(cls, *args, **kwargs):
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if not cls._instance:
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# 使用 super() 调用 object 的 __new__ 来创建单例内存
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cls._instance = super(DnsManager, cls).__new__(cls)
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return cls._instance
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def __init__(self, cache_ttl=600):
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if hasattr(self, '_initialized'):
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return
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self.cache_ttl = cache_ttl
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self.cache = {} # 缓存: {"hostname": {"ip": "xxx", "expiry": 0}}
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self.logger = logging.getLogger("DnsManager")
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self._initialized = True
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def _fetch_ip_from_http(self, hostname):
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"""核心:通过 HTTPS (TCP 443) 绕过系统 UDP DNS 限制获取 IP"""
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try:
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# 注意:这里直接使用 Google DNS 的 API 地址
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url = f"https://dns.google/resolve?name={hostname}&type=A"
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req = urllib.request.Request(url, headers={"Accept": "application/dns-json"})
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with urllib.request.urlopen(req, timeout=5) as response:
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data = json.loads(response.read().decode())
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if "Answer" in data:
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for answer in data['Answer']:
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if answer['type'] == 1: # 只要 A 记录 (IPv4)
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return answer['data']
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except Exception as e:
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self.logger.warning(f"DoH 解析失败 {hostname}: {e}")
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return None
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def get_ip(self, hostname):
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"""获取 IP 逻辑:缓存 -> DoH -> 保底"""
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# 1. 如果是纯 IP 地址,直接返回
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if hostname.replace('.', '').isdigit():
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return hostname
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current_time = time.time()
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# 2. 检查缓存
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if hostname in self.cache:
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if current_time < self.cache[hostname]['expiry']:
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return self.cache[hostname]['ip']
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# 3. HTTP 解析
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new_ip = self._fetch_ip_from_http(hostname)
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if new_ip:
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self.cache[hostname] = {
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"ip": new_ip,
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print(f"🔄 [DNS库] 动态解析成功: {hostname} -> {new_ip}")
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return new_ip
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# 4. 保底 IP (Discord)
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if hostname in self.cache:
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return self.cache[hostname]['ip']
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return "162.159.137.232"
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def patch_socket(self):
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"""注入补丁:除了 dns.google,全部强行接管"""
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original_getaddrinfo = socket.getaddrinfo
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def patched_getaddrinfo(*args, **kwargs):
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host = args[0]
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port = args[1]
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# 关键排除逻辑:
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# 如果请求的是 dns.google 本身,必须走原始解析,否则会陷入死循环(无限递归)
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if host == "dns.google":
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return original_getaddrinfo(*args, **kwargs)
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# 其他所有请求(Discord, MongoDB 等)全部走补丁
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try:
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latest_ip = self.get_ip(host)
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# 强制返回 IPv4 结构体给系统
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return [(socket.AF_INET, socket.SOCK_STREAM, 6, '', (latest_ip, port))]
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except Exception:
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# 最后的最后,如果补丁崩了,尝试退回原始解析
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return original_getaddrinfo(*args, **kwargs)
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socket.getaddrinfo = patched_getaddrinfo
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print("💉 [DNS库] 全局覆盖模式已加载:除 dns.google 外,所有域名解析已托管至 DoH")
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# 导出单例实例
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dns_manager = DnsManager()
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