Fix handling of four byte utf8 manifests

- Adds the charset: utf-8 to all the manifest responses
- Makes sure we connect to MySQL in utf8mb4 mode, to ensure we can properly read and write 4-byte utf8 strings
- Adds tests for all of the above

data/database.py

@@ -70,6 +70,12 @@ SCHEME_RANDOM_FUNCTION = {
 }
 
 
+_EXTRA_ARGS = {
+  'mysql': dict(charset='utf8mb4'),
+  'mysql+pymysql': dict(charset='utf8mb4'),
+}
+
+
 def pipes_concat(arg1, arg2, *extra_args):
   """ Concat function for sqlite, since it doesn't support fn.Concat.
       Concatenates clauses with || characters.
@@ -315,6 +321,10 @@ def _db_from_url(url, db_kwargs, connect_timeout=DEFAULT_DB_CONNECT_TIMEOUT,
     db_kwargs.pop('stale_timeout', None)
     db_kwargs.pop('max_connections', None)
 
+  for key, value in _EXTRA_ARGS.get(parsed_url.drivername, {}).iteritems():
+    if key not in db_kwargs:
+      db_kwargs[key] = value
+
   if allow_retry:
     driver = _wrap_for_retry(driver)
 

data/registry_model/test/test_interface.py

@@ -1,3 +1,5 @@
+# -*- coding: utf-8 -*-
+
 import hashlib
 import json
 import uuid
@@ -864,3 +866,33 @@ def test_known_issue_schema1(registry_model):
   assert found.digest == digest
   assert found.internal_manifest_bytes.as_encoded_str() == manifest.bytes.as_encoded_str()
   assert found.get_parsed_manifest().digest == digest
+
+
+def test_unicode_emoji(registry_model):
+  builder = DockerSchema1ManifestBuilder('devtable', 'simple', 'latest')
+  builder.add_layer('sha256:abcde', json.dumps({
+    'id': 'someid',
+    'author': u'😱',
+  }, ensure_ascii=False))
+
+  manifest = builder.build(ensure_ascii=False)
+  manifest._validate()
+
+  for blob_digest in manifest.local_blob_digests:
+    _populate_blob(blob_digest)
+
+  # Create the manifest in the database.
+  repository_ref = registry_model.lookup_repository('devtable', 'simple')
+  created_manifest, _ = registry_model.create_manifest_and_retarget_tag(repository_ref, manifest,
+                                                                        'latest', storage)
+  assert created_manifest
+  assert created_manifest.digest == manifest.digest
+  assert (created_manifest.internal_manifest_bytes.as_encoded_str() ==
+          manifest.bytes.as_encoded_str())
+
+  # Look it up again and validate.
+  found = registry_model.lookup_manifest_by_digest(repository_ref, manifest.digest, allow_dead=True)
+  assert found
+  assert found.digest == manifest.digest
+  assert found.internal_manifest_bytes.as_encoded_str() == manifest.bytes.as_encoded_str()
+  assert found.get_parsed_manifest().digest == manifest.digest

endpoints/v2/manifest.py

@@ -76,7 +76,7 @@ def fetch_manifest_by_tagname(namespace_name, repo_name, manifest_ref):
     supported.bytes.as_unicode(),
     status=200,
     headers={
-      'Content-Type': supported.media_type,
+      'Content-Type': '%s; charset=utf-8' % supported.media_type,
       'Docker-Content-Digest': supported.digest,
     },
   )
@@ -111,7 +111,7 @@ def fetch_manifest_by_digest(namespace_name, repo_name, manifest_ref):
   metric_queue.repository_pull.Inc(labelvalues=[namespace_name, repo_name, 'v2', True])
 
   return Response(supported.bytes.as_unicode(), status=200, headers={
-    'Content-Type': supported.media_type,
+    'Content-Type': '%s; charset=utf-8' % supported.media_type,
     'Docker-Content-Digest': supported.digest,
   })
 

image/docker/test/test_schema1.py

@@ -178,3 +178,22 @@ def test_validate_manifest_known_issue():
 
   layers = list(manifest.get_layers(None))
   assert layers[-1].author is None
+
+
+@pytest.mark.parametrize('with_key', [
+  None,
+  docker_v2_signing_key,
+])
+def test_validate_manifest_with_emoji(with_key):
+  builder = DockerSchema1ManifestBuilder('somenamespace', 'somerepo', 'sometag')
+  builder.add_layer('sha256:abcde', json.dumps({
+    'id': 'someid',
+    'author': u'😱',
+  }, ensure_ascii=False))
+
+  built = builder.build(with_key, ensure_ascii=False)
+  built._validate()
+
+  # Ensure the manifest can be reloaded.
+  built_bytes = built.bytes.as_encoded_str()
+  DockerSchema1Manifest(Bytes.for_string_or_unicode(built_bytes))

test/fixtures.py

@@ -83,6 +83,7 @@ def _init_db_path_sqlite(tmpdir_factory):
   initialize_database()
 
   db.obj.execute_sql('PRAGMA foreign_keys = ON;')
+  db.obj.execute_sql('PRAGMA encoding="UTF-8";')
 
   populate_database()
   close_db_filter(None)
@@ -157,7 +158,9 @@ def initialized_db(appconfig):
   if not under_test_real_database:
     # Make absolutely sure foreign key constraints are on.
     db.obj.execute_sql('PRAGMA foreign_keys = ON;')
+    db.obj.execute_sql('PRAGMA encoding="UTF-8";')
     assert db.obj.execute_sql('PRAGMA foreign_keys;').fetchone()[0] == 1
+    assert db.obj.execute_sql('PRAGMA encoding;').fetchone()[0] == 'UTF-8'
 
   # If under a test *real* database, setup a savepoint.
   if under_test_real_database:

test/registry/protocol_fixtures.py

@@ -138,6 +138,20 @@ def images_with_empty_layer():
   ]
 
 
+@pytest.fixture(scope="session")
+def unicode_emoji_images():
+  """ Returns basic images for push and pull testing that contain unicode in the image metadata. """
+  # Note: order is from base layer down to leaf.
+  parent_bytes = layer_bytes_for_contents('parent contents')
+  image_bytes = layer_bytes_for_contents('some contents')
+  return [
+    Image(id='parentid', bytes=parent_bytes, parent_id=None),
+    Image(id='someid', bytes=image_bytes, parent_id='parentid',
+          config={'comment': u'😱',
+                  'author': u'Sômé guy'}),
+  ]
+
+
 @pytest.fixture(scope="session")
 def jwk():
   return RSAKey(key=RSA.generate(2048))

test/registry/protocol_v2.py

@@ -168,9 +168,9 @@ class V2Protocol(RegistryProtocol):
         return None
 
       # Parse the returned manifest list and ensure it matches.
-      assert response.headers['Content-Type'] == DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE
-      retrieved = parse_manifest_from_bytes(Bytes.for_string_or_unicode(response.text),
-                                            response.headers['Content-Type'])
+      ct, _ = response.headers['Content-Type'].split(';', 1)
+      assert ct == DOCKER_SCHEMA2_MANIFESTLIST_CONTENT_TYPE
+      retrieved = parse_manifest_from_bytes(Bytes.for_string_or_unicode(response.text), ct)
       assert retrieved.schema_version == 2
       assert retrieved.is_manifest_list
       assert retrieved.digest == manifestlist.digest
@@ -185,9 +185,8 @@ class V2Protocol(RegistryProtocol):
                                 headers=headers)
         if expected_failure is not None:
           return None
-
-        manifest = parse_manifest_from_bytes(Bytes.for_string_or_unicode(response.text),
-                                             response.headers['Content-Type'])
+        ct, _ = response.headers['Content-Type'].split(';', 1)
+        manifest = parse_manifest_from_bytes(Bytes.for_string_or_unicode(response.text), ct)
         assert not manifest.is_manifest_list
         assert manifest.digest == manifest_digest
 
@@ -546,11 +545,11 @@ class V2Protocol(RegistryProtocol):
         return None
 
       # Ensure the manifest returned by us is valid.
+      ct, _ = response.headers['Content-Type'].split(';', 1)
       if not self.schema2:
-        assert response.headers['Content-Type'] in DOCKER_SCHEMA1_CONTENT_TYPES
+        assert ct in DOCKER_SCHEMA1_CONTENT_TYPES
 
-      manifest = parse_manifest_from_bytes(Bytes.for_string_or_unicode(response.text),
-                                           response.headers['Content-Type'])
+      manifest = parse_manifest_from_bytes(Bytes.for_string_or_unicode(response.text), ct)
       manifests[tag_name] = manifest
 
       if manifest.schema_version == 1:

test/registry/registry_tests.py

@@ -1822,3 +1822,35 @@ def test_push_legacy_pull_not_allowed(v22_protocol, v1_protocol, remote_images,
   # Attempt to pull. Should fail with a 404.
   v1_protocol.pull(liveserver_session, 'devtable', 'newrepo', 'latest', remote_images,
                    credentials=credentials, expected_failure=Failures.UNKNOWN_TAG)
+
+
+def test_push_pull_emoji_unicode(pusher, puller, unicode_emoji_images, liveserver_session,
+                                 app_reloader):
+  """ Test: Push an image with unicode inside and then pull it. """
+  credentials = ('devtable', 'password')
+
+  # Push a new repository.
+  pusher.push(liveserver_session, 'devtable', 'newrepo', 'latest', unicode_emoji_images,
+              credentials=credentials)
+
+  # Pull the repository to verify.
+  puller.pull(liveserver_session, 'devtable', 'newrepo', 'latest', unicode_emoji_images,
+              credentials=credentials)
+
+
+def test_push_pull_emoji_unicode_direct(pusher, puller, unicode_emoji_images, liveserver_session,
+                                        app_reloader):
+  """ Test: Push an image with *unescaped* unicode inside and then pull it. """
+  credentials = ('devtable', 'password')
+
+  # Turn off automatic unicode encoding when building the manifests.
+  options = ProtocolOptions()
+  options.ensure_ascii = False
+
+  # Push a new repository.
+  pusher.push(liveserver_session, 'devtable', 'newrepo', 'latest', unicode_emoji_images,
+              credentials=credentials, options=options)
+
+  # Pull the repository to verify.
+  puller.pull(liveserver_session, 'devtable', 'newrepo', 'latest', unicode_emoji_images,
+              credentials=credentials, options=options)