File documents stored in 4D BLOB field and on the disk outside of 4D database can be exposed to 4D Mobile as BLOB object. However, due to the different implementation of document and BLOB in JavaScript, the BLOB objects retrieved by Wakanda need to be converted to File object before used by web client. This tech note’s goal is to explore the methods to access and retrieve file documents from 4D server stored in disk, or in BLOB field of 4D data file, and how to convert them into valid file objects for web clients.

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