Upload .CSV file through UI5 and return data back to UI5

Hi Experts,

Our requirement is to upload .CSV file provided by UI5.The content of file(multiple records) should be returned back to UI5 by gateway.

Limitations are:-

1. We can't store file data in database(temporary/Permanent). So we have to upload and return data in same call.

2. As we need to validate content we can't read .csv file data in Ui5. Also file may contain a lot of records so we cannot upload file directly using browser tools.

Is there any option where we can return the file data in the same call in which the file is getting posted (POST request)?

Thanks in advance for the response.

Regards