[8.0][IMP][website_canonical_url] Safer, prefer root, relative paths (O…

…CA#260)

[IMP] website_canoncial_url: Several improvements

* Use safe method to retrieve lang.

This avoids a possible `KeyError`.

* Use relative paths.

Makes this work fine behind an HTTPS proxy.

* Prefer `/` over `/page/homepage`.

The root path canonicalized is more SEO and user friendly.

website_canonical_url/README.rst

@@ -27,6 +27,7 @@ Contributors
 
 * Thomas Rehn <[email protected]>
 * Rami Alwafaie <[email protected]>
+* Jairo Llopis <[email protected]>
 
 Maintainer
 ----------

website_canonical_url/__openerp__.py

@@ -4,13 +4,11 @@
 
 {
     'name': "Website Canoncial URL",
-    'summary': """
-        Canonical URL in Website Headers
-        """,
-    'author': "initOS GmbH, Odoo Community Association (OCA)",
+    'summary': "Canonical URL in Website Headers",
+    'author': "initOS GmbH, Tecnativa, Odoo Community Association (OCA)",
     'website': "http://www.initos.com",
     'category': 'Website',
-    'version': '8.0.1.0.0',
+    'version': '8.0.1.1.0',
     'license': 'AGPL-3',
     'depends': [
         'website',

website_canonical_url/models/website.py

@@ -15,14 +15,21 @@ def get_canonical_url(self, req=None):
         canonical_url = None
         if req is None:
             req = request
-        if req and req.httprequest.base_url:
-            lang = self._context['lang']
+        if req and req.httprequest.path:
+            lang = self.env.lang
             if lang == request.website.default_lang_code:
-                canonical_url = req.httprequest.base_url
+                canonical_url = req.httprequest.path
             else:
-                url_parts = urlparse(req.httprequest.base_url)
+                url_parts = urlparse(req.httprequest.path)
                 url_parts = list(url_parts)
                 # change the path of the url
                 url_parts[2] = lang + url_parts[2]
                 canonical_url = urlunparse(url_parts)
+        # Special case for rerouted requests to root path
+        try:
+            if (canonical_url.startswith("/page/") and
+                    self.menu_id.child_id[0].url == canonical_url):
+                canonical_url = "/"
+        except:
+            pass
         return canonical_url