4D Mobile API is a fully RESTful, API, any data transmitted between 4D and Wakanda must be represented in JSON, a text-based format. In order for 4D method to receive and return binary files like image and PDF, the binary data must be encoded into text-based format. Base64 encoding is a widely used binary-to-text encoding scheme supported in both 4D and Wakanda. In this tech note, I will demonstrate the process of Base64 encoding in 4D and Wakanda and the application in real use cases.

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