Passing An Image Back To Workflow

[MartinPacker]

Something for y'all to pick the bits out of...

A reply from @WorkflowHQ on Twitter contained the following...

"Also regarding sending images, Workflow can decode base64 encoded images."

Does this help us here? Can we encode images base64?

[omz]

@MartinPacker Encoding images as base64 should be fairly straightforward in Python. Do you have any more details?

[ccc]

https://forum.omz-software.com/topic/2974/need-python-script-to-decode-or-encode-in-base64

[omz]

I figured out how to do it without using the clipboard. The trick is basically to use "Get Contents of URL" with a data: URI that gets passed to the workflow via the workflow:// scheme, containing base64-encoded image data.

Here's the script:

import webbrowser
import base64
from PIL import Image
import io
from urllib.parse import quote

img = Image.open('test:Lenna')

buffer = io.BytesIO()
img.save(buffer, 'PNG')
data_uri = 'data:image/png;base64,' + base64.b64encode(buffer.getvalue()).decode('ascii')

webbrowser.open('workflow://run-workflow?name=EditBase64Image&input=' + quote(data_uri, ''))

...and the workflow should be something like this:

[shtek]

invalid base64 encode.
remove 'data:image/png;base64,' like this:

data_uri  = base64.b64encode(buffer.getvalue()).decode('ascii')

now it works