Update app.py

app.py

@@ -5,6 +5,9 @@ import subprocess
 import sys
 
 app = Flask(__name__)
+@app.route("/")
+def index():
+    return "Hello world"
 
 processes = {
     "yt": {
@@ -141,6 +144,52 @@ def cors_proxy():
 
     return response
 
+@app.errorhandler(404)
+def cors_proxy_404(e):
+    baseurl = request.args.get("baseurl23896")
+    if not baseurl:
+        return abort(404)
+
+    # baseurl23896 以外のパラメータをそのまま渡す
+    forward_params = {
+        k: v for k, v in request.args.items()
+        if k != "baseurl23896"
+    }
+
+    # 転送先URLを組み立て
+    target_url = baseurl.rstrip("/") + request.path
+    if forward_params:
+        target_url += "?" + urlencode(forward_params, doseq=True)
+
+    try:
+        resp = requests.request(
+            method=request.method,
+            url=target_url,
+            headers={
+                k: v for k, v in request.headers
+                if k.lower() not in ["host", "content-length"]
+            },
+            data=request.get_data(),
+            cookies=request.cookies,
+            allow_redirects=False,
+            timeout=10,
+        )
+    except requests.RequestException:
+        return abort(502)
+
+    excluded_headers = [
+        "content-encoding",
+        "content-length",
+        "transfer-encoding",
+        "connection",
+    ]
+    headers = [
+        (k, v) for k, v in resp.headers.items()
+        if k.lower() not in excluded_headers
+    ]
+
+    return Response(resp.content, resp.status_code, headers)
+
 if __name__ == "__main__":
     if os.environ.get("WERKZEUG_RUN_MAIN") != "true":
         start_processes()