Created
September 20, 2022 16:20
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| def download(q: Q, loop: asyncio.AbstractEventLoop): | |
| bucket = 'h2o-wave' | |
| file_key = 'releases/h2o_wave-0.22.0-py3-none-win_amd64.whl' | |
| # Get the total size of the file. | |
| total = boto3.client('s3').head_object(Bucket=bucket, Key=file_key)['ContentLength'] | |
| already_downloaded = 0 | |
| # Nested update function that is called periodically from within boto. | |
| def update(val): | |
| nonlocal already_downloaded | |
| already_downloaded += val | |
| # Update the Wave UI. | |
| asyncio.ensure_future(update_ui(q, already_downloaded / total), loop=loop) | |
| # Since boto3 is synchronous, this download is blocking. | |
| boto3.resource('s3').Bucket(bucket).download_file( | |
| file_key, 'hello.whl', Callback=update | |
| ) | |
| asyncio.ensure_future(show_notification(q), loop=loop) | |
| async def show_notification(q: Q): | |
| q.page['meta'].dialog = None | |
| q.page['meta'].notification_bar = ui.notification_bar( | |
| name='success_notification', | |
| text='Job done!', | |
| type='success', | |
| events=['dismissed'] | |
| ) | |
| await q.page.save() | |
| async def update_ui(q: Q, value: int): | |
| q.page['meta'].dialog.items[0].progress.value = value | |
| await q.page.save() |
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