fix: return 400 instead of 500 when file field is missing in audio-to-text endpoints (#39303) (#39322)

api/controllers/console/explore/trial.py

@@ -645,7 +645,7 @@ class TrialChatAudioApi(TrialAppResource):
     def post(self, current_user: Account, trial_app):
         app_model = trial_app
 
-        file = request.files["file"]
+        file = request.files.get("file")
 
         try:
             # Get IDs before they might be detached from session

api/controllers/service_api/app/audio.py

@@ -101,7 +101,7 @@ class AudioApi(Resource):
 
         Accepts an audio file upload and returns the transcribed text.
         """
-        file = request.files["file"]
+        file = request.files.get("file")
 
         try:
             response = AudioService.transcript_asr(

api/controllers/web/audio.py

@@ -76,7 +76,7 @@ class AudioApi(WebApiResource):
     @web_ns.response(200, "Success", web_ns.models[AudioToTextResponse.__name__])
     def post(self, app_model: App, end_user: EndUser):
         """Convert audio to text"""
-        file = request.files["file"]
+        file = request.files.get("file")
 
         try:
             response = AudioService.transcript_asr(