From e0304bc5000620262746dcdc15422b51740cd7f4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Sznuk?= <ls@rdprojekt.pl>
Date: Wed, 28 Aug 2019 16:17:45 +0200
Subject: [PATCH] Allows leading // for mocked s3 paths (#1637).

---
 moto/s3/urls.py          |  2 ++
 moto/server.py           |  5 +++--
 tests/test_s3/test_s3.py | 27 +++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/moto/s3/urls.py b/moto/s3/urls.py
index fa81568a4..1388c81e5 100644
--- a/moto/s3/urls.py
+++ b/moto/s3/urls.py
@@ -15,4 +15,6 @@ url_paths = {
     '{0}/(?P<key_or_bucket_name>[^/]+)/?$': S3ResponseInstance.ambiguous_response,
     # path-based bucket + key
     '{0}/(?P<bucket_name_path>[^/]+)/(?P<key_name>.+)': S3ResponseInstance.key_response,
+    # subdomain bucket + key with empty first part of path
+    '{0}//(?P<key_name>.*)$': S3ResponseInstance.key_response,
 }
diff --git a/moto/server.py b/moto/server.py
index 89be47093..b245f6e6f 100644
--- a/moto/server.py
+++ b/moto/server.py
@@ -174,10 +174,11 @@ def create_backend_app(service):
     backend_app.url_map.converters['regex'] = RegexConverter
     backend = list(BACKENDS[service].values())[0]
     for url_path, handler in backend.flask_paths.items():
+        view_func = convert_flask_to_httpretty_response(handler)
         if handler.__name__ == 'dispatch':
             endpoint = '{0}.dispatch'.format(handler.__self__.__name__)
         else:
-            endpoint = None
+            endpoint = view_func.__name__
 
         original_endpoint = endpoint
         index = 2
@@ -191,7 +192,7 @@ def create_backend_app(service):
             url_path,
             endpoint=endpoint,
             methods=HTTP_METHODS,
-            view_func=convert_flask_to_httpretty_response(handler),
+            view_func=view_func,
             strict_slashes=False,
         )
 
diff --git a/tests/test_s3/test_s3.py b/tests/test_s3/test_s3.py
index cd57fc92b..0c0721f01 100644
--- a/tests/test_s3/test_s3.py
+++ b/tests/test_s3/test_s3.py
@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 
 import datetime
+import os
 from six.moves.urllib.request import urlopen
 from six.moves.urllib.error import HTTPError
 from functools import wraps
@@ -23,6 +24,7 @@ from freezegun import freeze_time
 import six
 import requests
 import tests.backport_assert_raises  # noqa
+from nose import SkipTest
 from nose.tools import assert_raises
 
 import sure  # noqa
@@ -2991,3 +2993,28 @@ def test_accelerate_configuration_is_not_supported_when_bucket_name_has_dots():
             AccelerateConfiguration={'Status': 'Enabled'},
         )
     exc.exception.response['Error']['Code'].should.equal('InvalidRequest')
+
+def store_and_read_back_a_key(key):
+    s3 = boto3.client('s3', region_name='us-east-1')
+    bucket_name = 'mybucket'
+    body = b'Some body'
+
+    s3.create_bucket(Bucket=bucket_name)
+    s3.put_object(
+        Bucket=bucket_name,
+        Key=key,
+        Body=body
+    )
+
+    response = s3.get_object(Bucket=bucket_name, Key=key)
+    response['Body'].read().should.equal(body)
+
+@mock_s3
+def test_paths_with_leading_slashes_work():
+    store_and_read_back_a_key('/a-key')
+
+@mock_s3
+def test_root_dir_with_empty_name_works():
+    if os.environ.get('TEST_SERVER_MODE', 'false').lower() == 'true':
+        raise SkipTest('Does not work in server mode due to error in Workzeug')
+    store_and_read_back_a_key('/')