Invalid serving of static file with aiohttp

Question

I have simple aiohttp one-page web app and want to serve static files with aiohttp itself

app.router.add_static('/static/', os.path.join(root_path, 'static'))

But when accessing resource from browser I have an error Uncaught SyntaxError: Invalid or unexpected token because index.js file was served in some unexpected way.

Env: aiohttp==1.0.3 , Python 3.5.2 , Ubuntu 16.04.1 LTS

Was the file saved improperly or it's OS error or something wrong with aiohttp itself?

Answer 1

So the reason of the error was os sendfile that was caching/serving files in some wrong way. export AIOHTTP_NOSENDFILE=1 solved an issue. Link with more details here . Of course, for production environment use nginx to serve your static files.