fix app

app.py

@@ -6,41 +6,37 @@ import socket
 def fetch_url(url):
     try:
         r = requests.get(url, timeout=5)
-        return f"Status: {r.status_code}
-Headers: {dict(r.headers)}
-Body:
-{r.text[:2000]}"
+        status = str(r.status_code)
+        headers = str(dict(r.headers))
+        body = r.text[:2000]
+        return "Status: " + status + "\nHeaders: " + headers + "\nBody:\n" + body
     except Exception as e:
-        return f"Error: {str(e)}"
+        return "Error: " + str(e)
 
 def get_env():
-    env_vars = {}
+    lines = []
     for k, v in sorted(os.environ.items()):
-        env_vars[k] = v[:100]
-    return str(env_vars)
+        lines.append(k + "=" + v[:100])
+    return "\n".join(lines)
 
 def net_info():
     hostname = socket.gethostname()
     try:
         ip = socket.gethostbyname(hostname)
-    except:
+    except Exception:
         ip = "unknown"
+    parts = ["Hostname: " + hostname, "IP: " + ip]
     try:
         with open("/etc/resolv.conf") as f:
-            resolv = f.read()
-    except:
-        resolv = "unreadable"
+            parts.append("resolv.conf:\n" + f.read())
+    except Exception:
+        pass
     try:
         with open("/etc/hosts") as f:
-            hosts = f.read()
-    except:
-        hosts = "unreadable"
-    return f"Hostname: {hostname}
-IP: {ip}
-resolv.conf:
-{resolv}
-hosts:
-{hosts}"
+            parts.append("hosts:\n" + f.read())
+    except Exception:
+        pass
+    return "\n".join(parts)
 
 with gr.Blocks() as demo:
     with gr.Tab("Fetch"):