use "with" statement for more safety (it's my opinion)

app.py

@@ -11,26 +11,28 @@ def transcribe_audio(file_path):
     if not ASR_API_URL or not AUTH_TOKEN:
         return "Error: Missing ASR_API_URL or AUTH_TOKEN.", None
 
-    # Prepare headers and data
     headers = {
-        'accept': 'application/json',
+        'Accept': 'application/json',
         'Authorization': f'Bearer {AUTH_TOKEN}',
     }
-    files = {
-        'file': (file_path, open(file_path, 'rb'), 'audio/mpeg'),
-    }
-    start_time = time.time()
-    # Send POST request
-    response = requests.post(ASR_API_URL, headers=headers, files=files)
-    inference_time = time.time() - start_time  # in seconds
-
-    # Check if response is successful
-    if response.status_code == 200:
-        transcription = response.json().get("transcription", "No transcription returned.")
-        inference_time_str = f"{response.json().get('time', 'No inference time returned.')} seconds"
-        return transcription, inference_time_str
-    else:
-        return f"Error: {response.status_code}, {response.text}", None
+
+    try:
+        with open(file_path, 'rb') as audio_file:
+            files = {'file': (file_path, audio_file, 'audio/mpeg')}
+            start_time = time.time()
+            response = requests.post(ASR_API_URL, headers=headers, files=files)
+            elapsed_time = time.time() - start_time
+
+        if response.ok:
+            data = response.json()
+            transcription = data.get('transcription', 'No transcription returned.')
+            inference_time = f"{data.get('time', round(elapsed_time, 2))} seconds"
+            return transcription, inference_time
+        else:
+            return f"Error: {response.status_code}, {response.text}", None
+
+    except Exception as e:
+        return f"Exception occurred: {str(e)}", None
 
 
 # Set up the Gradio interface