Avoid 'localhost' lookup in tests

On Windows (Github Actions) the lookup for 'localhost' takes 1 second.
This is because:
- Windows retries connect() with a timeout
- the machine has IPv6 and IPv4 but Testserver only binds the port on IPv4
- the test clients connect to 'localhost'

Since socketserver.TCPServer does not seem to support IPv6 before 3.8,
just replace 'localhost' with '127.0.0.1' in client-side URLs.

See #1257

Signed-off-by: Teodora Sechkova <tsechkova@vmware.com>

Author: sechkova

tests/test_arbitrary_package_attack.py

@@ -124,7 +124,7 @@ def setUp(self):
     # Set the url prefix required by the 'tuf/client/updater.py' updater.
     # 'path/to/tmp/repository' -> 'localhost:8001/tmp/repository'.
     repository_basepath = self.repository_directory[len(os.getcwd()):]
-    url_prefix = 'http://localhost:' \
+    url_prefix = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + repository_basepath
 
     # Setting 'tuf.settings.repository_directory' with the temporary client

tests/test_download.py

@@ -77,7 +77,7 @@ def setUp(self):
     self.server_process_handler = utils.TestServerProcess(log=logger)
 
     rel_target_filepath = os.path.basename(target_filepath)
-    self.url = 'http://localhost:' \
+    self.url = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + '/' + rel_target_filepath
 
     # Computing hash of target file data.
@@ -172,14 +172,14 @@ def test_download_url_to_tempfileobj_and_urls(self):
     self.assertRaises(securesystemslib.exceptions.FormatError,
                       download_file, None, self.target_data_length, self.fetcher)
 
-    url = 'http://localhost:' \
+    url = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + '/' + self.random_string()
     self.assertRaises(requests.exceptions.HTTPError,
                       download_file,
                       url,
                       self.target_data_length,
                       self.fetcher)
-    url1 = 'http://localhost:' \
+    url1 = 'http://127.0.0.1:' \
       + str(self.server_process_handler.port + 1) + '/' + self.random_string()
     self.assertRaises(requests.exceptions.ConnectionError,
                       download_file,

tests/test_endless_data_attack.py

@@ -126,7 +126,7 @@ def setUp(self):
     # Set the url prefix required by the 'tuf/client/updater.py' updater.
     # 'path/to/tmp/repository' -> 'localhost:8001/tmp/repository'.
     repository_basepath = self.repository_directory[len(os.getcwd()):]
-    url_prefix = 'http://localhost:' \
+    url_prefix = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + repository_basepath
 
     # Setting 'tuf.settings.repository_directory' with the temporary client

tests/test_extraneous_dependencies_attack.py

@@ -133,7 +133,7 @@ def setUp(self):
     # Set the url prefix required by the 'tuf/client/updater.py' updater.
     # 'path/to/tmp/repository' -> 'localhost:8001/tmp/repository'.
     repository_basepath = self.repository_directory[len(os.getcwd()):]
-    url_prefix = 'http://localhost:' \
+    url_prefix = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + repository_basepath
 
     # Setting 'tuf.settings.repository_directory' with the temporary client

tests/test_fetcher.py

@@ -55,7 +55,7 @@ def setUp(self):
     self.server_process_handler = utils.TestServerProcess(log=logger)
 
     rel_target_filepath = os.path.basename(target_filepath)
-    self.url = 'http://localhost:' \
+    self.url = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + '/' + rel_target_filepath
 
     # Create a temporary file where the target file chunks are written

tests/test_indefinite_freeze_attack.py

@@ -146,7 +146,7 @@ def setUp(self):
     # Set the url prefix required by the 'tuf/client/updater.py' updater.
     # 'path/to/tmp/repository' -> 'localhost:8001/tmp/repository'.
     repository_basepath = self.repository_directory[len(os.getcwd()):]
-    url_prefix = 'http://localhost:' \
+    url_prefix = 'http://127.0.0.1:' \
         + str(self.server_process_handler.port) + repository_basepath
 
     # Setting 'tuf.settings.repository_directory' with the temporary client

tests/test_key_revocation_integration.py

@@ -132,7 +132,7 @@ def setUp(self):
 
     # 'path/to/tmp/repository' -> 'localhost:8001/tmp/repository'.
     repository_basepath = self.repository_directory[len(os.getcwd()):]
-    url_prefix = 'http://localhost:' \
+    url_prefix = 'http://127.0.0.1:' \
       + str(self.server_process_handler.port) + repository_basepath
 
     # Setting 'tuf.settings.repository_directory' with the temporary client

tests/test_mix_and_match_attack.py

@@ -132,7 +132,7 @@ def setUp(self):
     # Set the url prefix required by the 'tuf/client/updater.py' updater.
     # 'path/to/tmp/repository' -> 'localhost:8001/tmp/repository'.
     repository_basepath = self.repository_directory[len(os.getcwd()):]
-    url_prefix = 'http://localhost:' \
+    url_prefix = 'http://127.0.0.1:' \
       + str(self.server_process_handler.port) + repository_basepath
 
     # Setting 'tuf.settings.repository_directory' with the temporary client

tests/test_multiple_repositories_integration.py

@@ -136,8 +136,8 @@ def setUp(self):
 
     logger.debug('Server process 2 started.')
 
-    url_prefix = 'http://localhost:' + str(self.server_process_handler.port)
-    url_prefix2 = 'http://localhost:' + str(self.server_process_handler2.port)
+    url_prefix = 'http://127.0.0.1:' + str(self.server_process_handler.port)
+    url_prefix2 = 'http://127.0.0.1:' + str(self.server_process_handler2.port)
 
     self.repository_mirrors = {'mirror1': {'url_prefix': url_prefix,
                                            'metadata_path': 'metadata',

tests/test_proxy_use.py

@@ -167,10 +167,10 @@ def setUp(self):
 
     suffix = '/' + os.path.basename(target_filepath)
     self.url = \
-        'http://localhost:' + str(self.http_server_handler.port) + suffix
+        'http://127.0.0.1:' + str(self.http_server_handler.port) + suffix
 
     self.url_https = \
-        'https://localhost:' + str(self.https_server_handler.port) + suffix
+        'https://127.0.0.1:' + str(self.https_server_handler.port) + suffix