force _content to be bytes, not bytearray

[vukasin]

having _content as bytearray causes chardet to throw a ValueError. Here is an example of requesting a non-existing design doc.

Traceback (most recent call last):
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiohttp/server.py", line 272, in start
    yield from self.handle_request(message, payload)
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiohttp/web.py", line 85, in handle_request
    resp = yield from handler(request)
  File "/usr/lib64/python3.4/asyncio/tasks.py", line 105, in coro
    res = yield from res
  File "/home/vukasin/peach-2/peach/queue/__init__.py", line 43, in get
    q = yield from ddoc.view("queue", name)
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiocouchdb/v1/designdoc.py", line 332, in view
    params=params))
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiocouchdb/views.py", line 52, in request
    yield from resp.maybe_raise_error()
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiocouchdb/errors.py", line 140, in maybe_raise_error
    data = yield from resp.json()
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiohttp/client_reqrep.py", line 703, in json
    encoding = self._get_encoding()
  File "/home/vukasin/.local/lib64/python3.4/site-packages/aiohttp/client_reqrep.py", line 671, in _get_encoding
    encoding = chardet.detect(self._content)['encoding']
  File "/home/vukasin/.local/lib64/python3.4/site-packages/chardet/__init__.py", line 26, in detect
    raise ValueError('Expected a bytes object, not a unicode object')
ValueError: Expected a bytes object, not a unicode object

[kxepal]

Thanks for the patch!
This issue should be fixed by 682bdaaa commit . Personally, I don't use chardet anywhere, but could you test if the master works for you? If it does will make a new release.

P.S. Also, chardet @ master should be able to handle bytearrays as well chardet/chardet#57

[vukasin]

no longer relevant since it has been fixed upstream