50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
---
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title: DoH 服务器的 Python 实现
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categories: 散文杂记
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tags:
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- python
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- doh
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date: 2023/12/26 22:25
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updated: 2023/12/26 22:25
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---
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## 实现
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看到有 Go、PHP 语言实现的 DoH 服务器，于是弄了个 Python 实现的 DoH 服务器（兼容 RFC8484），可以使用 Nginx、Caddy 反向代理 `/dns-query` 接口完成部署。
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```
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"""
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/*
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* @Author: Silent YANG
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* @Date: 2023-11-29
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*/
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"""
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from flask import Flask, request, make_response
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from base64 import urlsafe_b64decode
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import socket
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app = Flask(__name__)
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socket.setdefaulttimeout(5)
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@app.route("/dns-query" ,methods=['GET', 'POST'])
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def dns_query():
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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if request.headers.get('CONTENT_TYPE') == 'application/dns-message':
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sock.sendto(request.stream.read(), ("127.0.0.1", 53))
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rx_meesage, addr = sock.recvfrom(4096)
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return make_response(rx_meesage, 200, {"Content-Type": "application/dns-message"})
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if request.method == "GET" and request.args.get("dns"):
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payload = urlsafe_b64decode(request.args.get("dns") + "===")
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sock.sendto(payload, ("127.0.0.1", 53))
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rx_meesage, addr = sock.recvfrom(4096)
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return make_response(rx_meesage, 200, {"Content-Type": "application/dns-message"})
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sock.close()
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return make_response("", 400)
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if __name__ == "__main__":
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app.run('127.0.0.1', debug=False, port=5000)
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```
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## 完整代码
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[https://github.com/silenty4ng/DoH](https://github.com/silenty4ng/DoH)
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