(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# First load a small JPG file..
bd = Chilkat::CkBinData.new()

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.
json1 = Chilkat::CkJsonObject.new()
json1.UpdateBd("starfish","base64",bd)

jsonStr = json1.emit()
print jsonStr + "\n";

# 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..
json2 = Chilkat::CkJsonObject.new()
json2.Load(jsonStr)

# Get the binary bytes.
bd2 = Chilkat::CkBinData.new()
json2.BytesOf("starfish","base64",bd2)

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

print "Success." + "\n";