python requests return file-like object for streaming

Question

I have created a requests object like this:

 obj.mp3 = requests.get('http://foo.com/bar.mp3', stream=True)

I thought that I could just feed this obj.mp3 object into any audio player that expects a file or an URI, obviously this idea is wrong: nothing played. Below are the full code:

#views.py

class ArticleDetailView(DetailView):
    model = Article
    template_name = 'song.html'

    def get_object(self):
        obj = super(ArticleDetailView, self).get_object()

        #code to store mp3 url in obj.mp3 and other stuff

        if obj.mp3:
            obj.mp3 = requests.get(obj.mp3, stream=True).content
        return obj

#song.html
<div class="audio">
  <audio src={{ article.mp3 }} type="audio/mpeg"> 
</div>

What is the correct way of treating return from requests as something that I can stream with a player? I know at least I can write the obj.mp3 to a file, then just point the player to the file location, but I am trying to avoid write the file to disk.

Thanks,

Answer 1

There's an attribute Response.raw, which is already a file-like object.

resp = requests.get(url, stream=True)
resp.raw # is what you need

Using io.BytesIO(resp.content) is not preferable since behind the scenes you're reading the same amount of data twice (also memory-wise): accessing resp.content reads everything from the network stream, then io.BytesIO(resp.content) is allocating again the same amount of memory, and then you read it from BytesIO object.