Visual Basic 6.0

Read/Write JSON with Binary Data such as JPEG Files

See more JSON Examples

Demonstrates how binary files could be stored in JSON in base64 format. Creates JSON containing the contents of a JPG file, and then reads the JSON to extract the JPEG image. Visual Basic 6.0

Dim success As Long
success = 0

' First load a small JPG file..
Dim bd As New ChilkatBinData

success = bd.LoadFile("qa_data/jpg/starfish20.jpg")
' Assume success, but your code should check for success..

' Create JSON containing the binary data in base64 format.
Dim json1 As New ChilkatJsonObject
success = json1.UpdateBd("starfish","base64",bd)

Dim jsonStr As String
jsonStr = json1.Emit()
Debug.Print jsonStr

' Here's the output:
' {"starfish":"/9j/4AAQSkZJRgA ... cN2iuLFsCEbDGxQkI6RO/n//2Q=="}

' Let's create a new JSON object, load it with the above JSON, and extract the JPG image..
Dim json2 As New ChilkatJsonObject
success = json2.Load(jsonStr)

' Get the binary bytes.
Dim bd2 As New ChilkatBinData
success = json2.BytesOf("starfish","base64",bd2)

' Save to a file.
success = bd2.WriteFile("qa_output/starfish20.jpg")

Debug.Print "Success."