[FIX] base: skip etag when attachment checksum is missing

png images not shown on ir.attachment kanban

Attachment that use db_datas have no checksum by default, which is used
to compute the stream's http ETag. Skip updating the ETag when it is
missing and determine freshness using the Last-Modified header instead.

closes odoo/odoo#139498

X-original-commit: 2d43bbae72fddf17e7d9045e90dbc070b2f57a19
Signed-off-by: Julien Castiaux (juc) <juc@odoo.com>

odoo/addons/base/models/ir_binary.py

@@ -220,13 +220,14 @@ class IrBinary(models.AbstractModel):
 
         if (width, height) == (0, 0):
             width, height = image_guess_size_from_field_name(field_name)
-        stream.etag += f'-{width}x{height}-crop={crop}-quality={quality}'
 
+        if isinstance(stream.etag, str):
+            stream.etag += f'-{width}x{height}-crop={crop}-quality={quality}'
         if isinstance(stream.last_modified, (int, float)):
             stream.last_modified = datetime.utcfromtimestamp(stream.last_modified)
         modified = werkzeug.http.is_resource_modified(
             request.httprequest.environ,
-            etag=stream.etag,
+            etag=stream.etag if isinstance(stream.etag, str) else None,
             last_modified=stream.last_modified
         )
 

odoo/addons/test_http/tests/test_static.py

@@ -280,6 +280,37 @@ class TestHttpStatic(TestHttpStaticCommon):
             res = self.url_open('/web/content/test_http.earth?field=galaxy_picture')
             self.assertEqual(res.status_code, 404)
 
+    def test_static17_content_missing_checksum(self):
+        att = self.env['ir.attachment'].create({
+            'name': 'testhttp.txt',
+            'db_datas': 'some data',
+            'public': True,
+        })
+        self.assertFalse(att.checksum)
+        self.assertDownload(
+            url=f'/web/content/{att.id}',
+            headers={},
+
+            assert_status_code=200,
+            assert_headers={
+                'Content-Length': '9',
+                'Content-Type': 'text/plain; charset=utf-8',
+                'Content-Disposition': 'inline; filename=testhttp.txt',
+            },
+            assert_content=b'some data',
+        )
+
+    def test_static18_image_missing_checksum(self):
+        with file_open('test_http/static/src/img/gizeh.png', 'rb') as file:
+            att = self.env['ir.attachment'].create({
+                'name': 'gizeh.png',
+                'db_datas': file.read(),
+                'mimetype': 'image/png',
+                'public': True,
+            })
+        self.assertFalse(att.checksum)
+        self.assertDownloadGizeh(f'/web/image/{att.id}')
+
 
 @tagged('post_install', '-at_install')
 class TestHttpStaticLogo(TestHttpStaticCommon):