issue_comments

I think what's happening here is Apache is actually making a request to /fixtures rather than making a request to /prefix/fixtures - and Datasette is replying to requests on both the prefixed and the non-prefixed paths.

This is pretty confusing! I think Datasette should ONLY reply to /prefix/fixtures instead and return a 404 for /fixtures - this would make things a whole lot easier to debug.

But shipping that change could break existing deployments. Maybe that should be a breaking change for 1.0.

On further thought I'm not going to do this. Having Datasette work behind a proxy the way it does right now is clearly easy for people to deploy (now that I've fixed the bugs) and I trust my improved tests to catch problems in the future.

OK, i think I got all of them this time!

The latest demo is now live at https://datasette-apache-proxy-demo.fly.dev/prefix/fixtures/sortable?_facet=pk2

I'm closing this issue, but feel free to re-open it if you spot any that I missed.

Ouch a nasty bug crept through there - https://datasette-apache-proxy-demo-j7hipcg4aq-uc.a.run.app/prefix/fixtures/compound_three_primary_keys says

500: name 'ds' is not defined

Adding that test found (I hope!) all of the remaining base_url bugs. There were a bunch! I think I finally get to close #838 too.

In the meantime I can catch these errors by changing the test to run each path twice, once with and once without the prefix. This should accurately simulate how Apache is working here.

This worked, I managed to get the tests to fail! Here's the change I made:

```diff diff --git a/tests/test_html.py b/tests/test_html.py index f24165b..dbdfe59 100644 --- a/tests/test_html.py +++ b/tests/test_html.py @@ -1614,12 +1614,19 @@ def test_metadata_sort_desc(app_client): "/fixtures/compound_three_primary_keys/a,a,a", "/fixtures/paginated_view", "/fixtures/facetable", + "/fixtures?sql=select+1", ], ) -def test_base_url_config(app_client_base_url_prefix, path): +@pytest.mark.parametrize("use_prefix", (True, False)) +def test_base_url_config(app_client_base_url_prefix, path, use_prefix): client = app_client_base_url_prefix - response = client.get("/prefix/" + path.lstrip("/")) + path_to_get = path + if use_prefix: + path_to_get = "/prefix/" + path.lstrip("/") + response = client.get(path_to_get) soup = Soup(response.body, "html.parser") + if path == "/fixtures?sql=select+1": + assert False for el in soup.findAll(["a", "link", "script"]): if "href" in el.attrs: href = el["href"] @@ -1642,11 +1649,12 @@ def test_base_url_config(app_client_base_url_prefix, path): # If this has been made absolute it may start http://localhost/ if href.startswith("http://localhost/"): href = href[len("http://localost/") :] - assert href.startswith("/prefix/"), { + assert href.startswith("/prefix/"), json.dumps({ "path": path, + "path_to_get": path_to_get, "href_or_src": href, "element_parent": str(el.parent), - } + }, indent=4, default=repr)

def test_base_url_affects_metadata_extra_css_urls(app_client_base_url_prefix): ```

Thanks to #1522 I have a live demo that exhibits this bug now: https://apache-proxy-demo.datasette.io/prefix/fixtures/attraction_characteristic