(VBScript) Read/Write JSON with Binary Data such as JPEG Files

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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' First load a small JPG file..
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.BinData")
set bd = CreateObject("Chilkat.BinData")

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.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json1 = CreateObject("Chilkat.JsonObject")
success = json1.UpdateBd("starfish","base64",bd)

jsonStr = json1.Emit()
outFile.WriteLine(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..
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json2 = CreateObject("Chilkat.JsonObject")
success = json2.Load(jsonStr)

' Get the binary bytes.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.BinData")
set bd2 = CreateObject("Chilkat.BinData")
success = json2.BytesOf("starfish","base64",bd2)

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

outFile.WriteLine("Success.")

outFile.Close