Canvas Data to JPG

canvasDataToJPG.py

# -*- coding:utf-8 -*-

from cStringIO import StringIO
from PIL import Image


def _saveAsPNG(data, path):
    output = open(path, 'wb')
    output.write(data)
    output.close()


def _saveAsJPG(data, path):
    img = Image.open(StringIO(data))
    img.save(path, 'JPEG', quality=100)


if __name__ == '__main__':
    """
    source: http://stackoverflow.com/a/7774848/5277071
    """

    # raw = document.getElementById('canvas').toDataURL()
    raw = (
        'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCA'
        'YAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9T'
        'XL0Y4OHwAAAABJRU5ErkJggg=='
    )

    data = raw.split('base64,')[-1].decode('base64')

    _saveAsPNG(data, '/tmp/dot.png')
    _saveAsJPG(data, '/tmp/dot.jpg')

upload: https://github.com/fengyuanchen/uploader
crope: https://github.com/fengyuanchen/cropper

falando um pouco sobre upload; http://stackoverflow.com/a/7716619/5277071