DNS fix 2

Dockerfile

@@ -10,7 +10,10 @@ WORKDIR /
 # Install requirements.txt 
 RUN pip install --no-cache-dir -r /requirements.txt
 
-EXPOSE 7860
+# copy test + entrypoint
+COPY test_dns.py /test_dns.py
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 
-# Start the FastAPI app on port 7860, the default port expected by Spaces
-CMD ["uvicorn", "router:app", "--host", "0.0.0.0", "--port", "7860"]
+EXPOSE 7860
+CMD ["/entrypoint.sh"]

entrypoint.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+set -e
+python /test_dns.py || true   # run DNS test (won't crash the container)
+exec uvicorn router:app --host 0.0.0.0 --port 7860

runtime.yaml

@@ -1,4 +1,5 @@
 sdk: docker
+app_port: 7860
 docker:
   build_args:
     DNS_SERVERS: "8.8.8.8,1.1.1.1"

test_dns.py

@@ -0,0 +1,20 @@
+# test_dns.py
+import socket, sys, requests, traceback
+
+def test(host):
+    print("=== TEST", host, "===")
+    try:
+        print("getaddrinfo:", socket.getaddrinfo(host, 443))
+    except Exception as e:
+        print("RESOLVE ERROR:", repr(e))
+    try:
+        r = requests.get(f"https://{host}", timeout=7)
+        print("HTTP status:", r.status_code)
+    except Exception as e:
+        print("HTTP ERROR:", repr(e))
+    print()
+
+if __name__ == "__main__":
+    for h in ("graph.facebook.com","www.googleapis.com"):
+        test(h)
+    sys.exit(0)