Added validation for the payload json

java/deepgram_audio_summary/Index.java

@@ -23,13 +23,14 @@ public RuntimeResponse main(RuntimeRequest req,RuntimeResponse res)throws Except
 
  // Validate the requested payload (URL)
  String payloadString=req.getPayload().toString();
- Map<String, Object> payload=gson.fromJson(payloadString,Map.class);
-
- errorResponse=validatePayload(payload,res);
+
+ errorResponse=validatePayload(payloadString,res);
  if(errorResponse!=null){
  return errorResponse;
  }
 
+ Map<String, Object> payload = gson.fromJson(payloadString,Map.class);
+
  // Get file url from payload
  String fileurl=payload.get("fileUrl").toString();
 
@@ -125,8 +126,16 @@ private RuntimeResponse checkEmptyAPIKey(RuntimeRequest req,RuntimeResponse res,
  * @param payload is the object that contains the URL
  * @return null if payload is valid, otherwise an error response
  */
-private RuntimeResponse validatePayload(Map<String, Object> payload,RuntimeResponse res){
+private RuntimeResponse validatePayload(String payloadString,RuntimeResponse res){
  Map<String, Object> responseData=new HashMap<>();
+ Map<String, Object> payload=new HashMap<>();;
+ try{
+ payload=gson.fromJson(payloadString,Map.class);
+ } catch (Exception e) {
+ responseData.put("success",false);
+ responseData.put("message","The payload is invalid. Example of valid payload:{\"fileUrl\": \"...\"}"); 
+ return res.json(responseData);
+ }
 
  // Validate that payload has fileUrl
  if(!payload.containsKey("fileUrl")){
@@ -154,18 +163,20 @@ private RuntimeResponse validatePayload(Map<String, Object> payload,RuntimeRespo
  * @return null is nothing is empty, otherwise an error response
  */
 private RuntimeResponse checkEmptyPayloadAndVariables(RuntimeRequest req,RuntimeResponse res){
- Map<String, Object> responseData=new HashMap<>();
+
+ Map<String, Object> responseData=new HashMap<>();
 
-  if(req.getPayload()==null||req.getPayload().trim().isEmpty()||req.getPayload().trim().equals("{}")){
+ if(req.getPayload()==null||req.getPayload().trim().isEmpty()||req.getPayload().trim().equals("{}")){
  responseData.put("success",false);
  responseData.put("message","Payload is empty, expected a payload with provider and URL");
-  return res.json(responseData);
-  }
-
-  if(req.getVariables()==null){
+ return res.json(responseData);
+
+ }
+ if(req.getVariables()==null){
  responseData.put("success",false);
  responseData.put("message","Empty function variables found. You need to pass an API key for the provider");
- return res.json(responseData);
- }
- return null;
+ return res.json(responseData);
+ }
+
+ return null;
 }