app.py 文件源码

def _render(prerender: Prerender, url: str, format: str = 'html') -> str:
    '''Retry once after TemporaryBrowserFailure occurred.'''
    for i in range(2):
        try:
            return await prerender.render(url, format)
        except (TemporaryBrowserFailure, asyncio.TimeoutError) as e:
            if i < 1:
                logger.warning('Temporary browser failure: %s, retry rendering %s in 1s', str(e), url)
                await asyncio.sleep(1)
                continue
            raise