[FIX] base: fixes http redirection

The 7d85ab1eac refactor of 'ir.http' introduced changes in `web/image` that
caused the route to no longer return early (to avoid data processing steps)
in the case of redirection and that caused `binary_content` to not set the
mimetype of the `ir.attachment` when it was an URL.

This commit fixes those issues, allowing `web/image` to redirect properly.

closes odoo/odoo#30777

addons/web/controllers/main.py

@@ -1061,7 +1061,7 @@ class Binary(http.Controller):
             filename_field=filename_field, download=download, mimetype=mimetype,
             default_mimetype='image/png', access_token=access_token)
 
-        if status != 200 and download:
+        if status == 301 or (status != 200 and download):
             return request.env['ir.http']._response_by_status(status, headers, content)
         if not content:
             content = base64.b64encode(self.placeholder(image='placeholder.png'))

odoo/addons/base/models/ir_http.py

@@ -277,7 +277,8 @@ class IrHttp(models.AbstractModel):
     @classmethod
     def _binary_ir_attachment_redirect_content(cls, record, default_mimetype='application/octet-stream'):
         # mainly used for theme images attachemnts
-        status = content = filename = mimetype = filehash = None
+        status = content = filename = filehash = None
+        mimetype = getattr(record, 'mimetype', False)
         if record.type == 'url' and record.url:
             # if url in in the form /somehint server locally
             url_match = re.match("^/(\w+)/(.+)$", record.url)

odoo/tools/image.py

@@ -321,11 +321,11 @@ def limited_image_resize(content, width=None, height=None, crop=False, upper_lim
     """
     :param content: bytes (should be an image)
     """
-    if content:
+    if content and (width or height):
         signatures = [b'\xFF\xD8\xFF', b'\x89PNG\r\n\x1A\n']
         decoded_content = base64.b64decode(content)
         is_image = any(decoded_content.startswith(signature) for signature in signatures)
-        if (width or height) and is_image:
+        if is_image:
             height = int(height or 0)
             width = int(width or 0)
             if crop: