redirect server

redirect_server/main.py

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+"""
+    This is redirect server for https://oauth.gitflic.ru/oauth/authorize
+    Base URL: https://gitflic.santaspeen.ru/
+    Author: @SantaSpeen
+    License: MIT
+"""
+import json
+import random
+from string import ascii_letters, digits
+
+from flask import Flask, request, redirect, abort
+
+app = Flask("gitflic oauth redirect")
+cache = {}
+
+
+@app.route("/favicon.ico")
+def fav():
+    return redirect("https://gitflic.ru/static/image/favicon/android-icon-192x192.png", 301)
+
+
+@app.route("/",  methods=["POST"])
+def save_code():
+    headers = request.headers
+
+    if headers.get('Cdn-Loop') == "cloudflare":
+
+        if headers['Cf-Connecting-Ip'] == "84.47.177.90":  # Gitflic server ip
+
+            jsn = json.loads(request.get_data())
+            cache[jsn['state']].update({"code": jsn['code']})
+            return "ok", 200
+
+    abort(403)
+
+
+@app.route("/<user_code>",  methods=["GET"])
+def redirect_to_localhost(user_code):
+    headers = request.headers
+    if headers.get('Cdn-Loop') == "cloudflare":
+        ip = headers['Cf-Connecting-Ip']
+        if cache.get(user_code) is None:
+            return "Unknown code.", 404
+
+        if cache[user_code]['ip'] != ip:
+            return "Cannot access from your IP.", 403
+
+        redirect_url = cache[user_code]['redirect'] + f"?code={cache[user_code]['code']}&state={user_code}"
+
+        del cache[user_code]
+
+        return redirect(redirect_url)
+
+    abort(403)
+
+
+@app.route("/getstate", methods=["GET"])
+def getcode():
+    headers = request.headers
+    if headers.get('Cdn-Loop') == "cloudflare":
+        ip = headers['Cf-Connecting-Ip']
+        port = request.args.get('port') or abort(401)
+        if port.isdigit() and 49152 <= int(port) <= 65535:
+            state = ''.join([random.choice(ascii_letters + digits) for _ in range(random.randint(10, 17))])
+            cache.update({state: {"ip": ip, "code": None, "redirect": f"http://localhost:{port}/"}})
+            return {"state": state, "allow_from": ip}, 201
+
+    abort(403)
+
+
+if __name__ == '__main__':
+    app.run("0.0.0.0", 18948, True)

redirect_server/readme

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+Тут находятся исходники сервера для редиректа на localhost сервер
+
+Никакие токены не сохраняются, сервер выполнен исключительно для удобства
+

redirect_server/requirements.txt

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+flask