Exemplo n.º 1
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def generate_cache_key(
    request: Request,
    method: str,
    varying_headers: typing.List[str],
    cache: Cache,
) -> str:
    """
    Return a cache key generated from the request full URL and varying
    response headers.

    Note that the given `method` may be different from that of the request, e.g.
    because we're trying to find a response cached from a previous GET request
    while this one is a HEAD request. (This is OK because web servers will strip content
    from responses to a HEAD request before sending them on the wire.)
    """
    assert method in CACHABLE_METHODS

    ctx = hashlib.md5()
    for header in varying_headers:
        value = request.headers.get(header)
        if value is not None:
            ctx.update(value.encode())

    absolute_url = str(request.url)
    url = hashlib.md5(absolute_url.encode("ascii"))

    return cache.make_key(
        f"cache_page.{method}.{url.hexdigest()}.{ctx.hexdigest()}")
Exemplo n.º 2
0
def generate_varying_headers_cache_key(request: Request, cache: Cache) -> str:
    """
    Return a cache key generated from the requested absolute URL, suitable for
    associating varying headers to a requested URL.
    """
    url = request.url.path
    url_hash = hashlib.md5(url.encode("ascii"))
    return cache.make_key(f"varying_headers.{url_hash.hexdigest()}")
Exemplo n.º 3
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def test_cache_version_kwarg_overrides_version_set_in_url():
    cache = Cache("dummy://null?version=2019", version="2020")
    key = cache.make_key("test")
    assert "2019" not in key
    assert "2020" in key
    assert "test" in key
Exemplo n.º 4
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def test_cache_key_prefix_kwarg_overrides_key_prefix_be_set_in_url():
    cache = Cache("dummy://null?key_prefix=prod", key_prefix="beta")
    key = cache.make_key("test")
    assert key.startswith("beta")
    assert "prod" not in key
    assert "test" in key
Exemplo n.º 5
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def test_cache_version_can_be_set_in_url():
    cache = Cache("dummy://null?version=2019")
    key = cache.make_key("test")
    assert "2019" in key
    assert "test" in key
Exemplo n.º 6
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def test_cache_key_prefix_can_be_set_in_url():
    cache = Cache("dummy://null?key_prefix=prod")
    key = cache.make_key("test")
    assert key.startswith("prod")
    assert "test" in key
Exemplo n.º 7
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def test_cache_created_key_includes_prefix_and_version():
    cache = Cache("dummy://null", key_prefix="prod", version="2019")
    key = cache.make_key("test")
    assert key.startswith("prod")
    assert "2019" in key
    assert "test" in key
Exemplo n.º 8
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def test_cache_key_default_version_can_be_overridded():
    cache = Cache("dummy://null", version="beta")
    key = cache.make_key("test", "custom")
    assert "beta" not in key
    assert "custom" in key
    assert "test" in key
Exemplo n.º 9
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def test_cache_created_key_includes_default_version():
    cache = Cache("dummy://null", version="beta")
    key = cache.make_key("test")
    assert "beta" in key
    assert "test" in key
Exemplo n.º 10
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def test_cache_created_key_includes_prefix():
    cache = Cache("dummy://null", key_prefix="prod")
    key = cache.make_key("test")
    assert key.startswith("prod")
    assert "test" in key