HTTP/2¶

Overview¶

Upgrading to HTTP/2 is largely transparent. It requires:

an ASGI server which supports is (e.g. Hypercorn)
TLS encryption

HTTP Push¶

There is a feature called HTTP/2 server push which allows the server to notify the client of urls required by the document being served before the client has received the document.

This can be implemented in the following manner:

async def test_page(request: HttpRequest) -> HttpResponse:
    html = """
<!DOCTYPE html>
<html>
    <head>
    <meta charset="utf-8">
    <title>Example 1</title>
    <script src="/clickHandler.js"></script>
    </head>
    <body>
    <h1>Example 1</h1>
    <button type="button" onclick="handleClick('here')">
        Click me
    </button>
    <p id="here" />
    </body>
</html>

"""
    pushes = [
        ('/clickhandler.js', [(b'accept', b'text/javascript')])
    ]
    return HttpResponse(200, [(b'content-type', b'text/html')], text_writer(html), pushes)