Files
odoo_source/addons/website
Romain Derie 7edde2b5a5 [FIX] website: prevent loop if auth=user route used as homepage url
One can very well select a "auth=user route" as homepage for his
website, like /my.

There would then be an issue with such an URL being set as homepage:
- As the user landed in the homepage controller which is auth=public,
  the system will add the public user as env user (see
  `_auth_method_public()`).
```
@http.route('/', type='http', auth="public", website=True, sitemap=True)
def index(self, **kw):
```
- Then, that controller will reroute to the homepage url (/my). The
  request.httprequest.path will now be /my
- Then, that controller will recall the dispatcher stack:
  `request._serve_ir_http()`
- From there, this call won't fail as it should because the user is
  considered as logged in as it went already through the
  `_auth_method_public()`, adding the public user as env.user.
  `_auth_method_user()` won't raise its error.
- The /my page will be rendered despite not being logged in.

Once the user land on that page, the system will actually detect him as
logged out on a page supposed to be accessed when logged in.
It will then:
1. Show a toaster to inform the user
2. Auto reload the page
As the current URL is still `/` (due to the reroute and not a redirect),
the same flow will happen again, and again, looping forever.

--------

Note that accessing /my directly won't be an issue, as it won't go
through the homepage controller (which is auth=public), so there won't
be a user_id set on the env (the public user), meaning that the dispatch
layer will reject the access and raise an access error (through
`_auth_method_user()`.
Also note that the same behavior will occur when going through the first
menu fallback mechanism:
- if the user didn't setup any homepage_url
- and deleted his / website.page
- and his first website menu is /my
In that case, it will go through the first menu redirect fallback, which
will be working fine (as it's a redirect and not a reroute).
With both those 2 flows (going through redirect), the user will
correctly land on the login page (which will redirect to /my once logged
in).

------

Finally, the other solution would be to prevent such a configuration
(/my as homepage_url) but it was not easily doable (if doable at all),
see https://github.com/odoo/odoo/pull/99100#discussion_r963055251

------

A test is also added and over the more complexe case (which should cover
everything):
- With /my as homepage_url
- With the / website.page deleted
- With /my as first menu URL
-> Accessing / as public user should:
   1. Reroute to /my (because of the homepage_url set to it) which
      should fail now thanks to this commit
   2. Since the reroute / re-serve failed, it should reach the
      "first menu fallback" mechanism, which is also /my
   3. That fallback should be a redirect, not a reroute, so the user
      should actually land on the login page
   4. Once logged in on that page, it should properly redirect to /my

opw-3077339

X-original-commit: 4f5899f769266edc27a0b2d812df092b95f43c71
Part-of: odoo/odoo#107759
2022-12-12 17:17:09 +01:00
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