[REM] website_utm: website depends on utm already

`_post_dispatch` is a late addition to the httpocalypse. It can be used
to alter the response object e.g. to inject headers or cookies. The
function is automatically called for regular, fallback and error
responses. On the other hand, `_dispatch` is only called when an
endpoint is matched and might not return a response in case of error.

task-2839031

closes odoo/odoo#96651

Related: odoo/upgrade#3710
Signed-off-by: Julien Castiaux <juc@odoo.com>

addons/utm/models/ir_http.py

@@ -12,16 +12,13 @@ class IrHttp(models.AbstractModel):
         return request.httprequest.host
 
     @classmethod
-    def _set_utm(cls):
+    def _set_utm(cls, response):
         domain = cls.get_utm_domain_cookies()
         for url_parameter, __, cookie_name in request.env['utm.mixin'].tracking_fields():
             if url_parameter in request.params and request.httprequest.cookies.get(cookie_name) != request.params[url_parameter]:
-                request.future_response.set_cookie(cookie_name, request.params[url_parameter], domain=domain)
-
+                response.set_cookie(cookie_name, request.params[url_parameter], domain=domain)
 
     @classmethod
-    def _dispatch(cls, endpoint):
-        # cannot override _pre_dispatch() as _set_utm() requires the
-        # params from the request's body.
-        cls._set_utm()
-        return super()._dispatch(endpoint)
+    def _post_dispatch(cls, response):
+        cls._set_utm(response)
+        super()._post_dispatch(response)

addons/website_utm/__init__.py

@@ -1,2 +0,0 @@
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-from . import models

addons/website_utm/__manifest__.py

@@ -1,11 +0,0 @@
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-{
-    'name': "Website UTM glue code",
-    'summary': "Technical module adding utm compatibility to website.",
-    'website': "https://www.odoo.com",
-    'category': 'Hidden',
-    'version': '1.0',
-    'depends': ['utm', 'website'],
-    'auto_install': True,
-    'license': 'LGPL-3',
-}

addons/website_utm/models/__init__.py

@@ -1,2 +0,0 @@
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-from . import ir_http

addons/website_utm/models/ir_http.py

@@ -1,13 +0,0 @@
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-from odoo import models
-
-
-class IrHttp(models.AbstractModel):
-    _inherit = 'ir.http'
-
-    @classmethod
-    def _serve_fallback(cls):
-        resp = super()._serve_fallback()
-        if resp:
-            cls._set_utm()
-        return resp