We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Python client issues
- trailing `/` on `api_url` causes failure
- `create_rgd_client` silently failing if `api_url` is bad

@mvandenburgh, would you please look into these

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `django-rgd/client/rgd_client/client.py`
Content:
```
1 import getpass
2 import logging
3 import os
4 from typing import List, Optional, Type
5 
6 import requests
7 
8 from .plugin import CorePlugin
9 from .session import RgdClientSession, clone_session
10 from .utils import API_KEY_DIR_PATH, API_KEY_FILE_NAME, DEFAULT_RGD_API
11 
12 logger = logging.getLogger(__name__)
13 
14 
15 class RgdClient:
16     def __init__(
17         self,
18         api_url: str = DEFAULT_RGD_API,
19         username: Optional[str] = None,
20         password: Optional[str] = None,
21         save: Optional[bool] = True,
22     ) -> None:
23         """
24         Initialize the base RGD Client.
25 
26         Args:
27             api_url: The base url of the RGD API instance.
28             username: The username to authenticate to the instance with, if any.
29             password: The password associated with the provided username. If None, a prompt will be provided.
30             save: Whether or not to save the logged-in user's API key to disk for future use.
31 
32         Returns:
33             A base RgdClient instance.
34         """
35         # Look for an API key in the environment. If it's not there, check username/password
36         api_key = _read_api_key(api_url=api_url, username=username, password=password)
37         if api_key is None:
38             if username is not None and password is None:
39                 password = getpass.getpass()
40 
41             # Get an API key for this user and save it to disk
42             if username and password:
43                 api_key = _get_api_key(api_url, username, password, save)
44                 if api_key is None:
45                     logger.error(
46                         'Failed to retrieve API key; are your username and password correct?'
47                     )
48 
49         self.session = RgdClientSession(base_url=api_url, auth_token=api_key)
50         self.rgd = CorePlugin(clone_session(self.session))
51 
52     def clear_token(self):
53         """Delete a locally-stored API key."""
54         (API_KEY_DIR_PATH / API_KEY_FILE_NAME).unlink(missing_ok=True)
55 
56 
57 def _get_api_key(api_url: str, username: str, password: str, save: bool) -> Optional[str]:
58     """Get an RGD API Key for the given user from the server, and save it if requested."""
59     resp = requests.post(f'{api_url}/api-token-auth', {'username': username, 'password': password})
60     token = resp.json().get('token')
61     if token is None:
62         return None
63     if save:
64         API_KEY_DIR_PATH.mkdir(parents=True, exist_ok=True)
65         with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'w') as fd:
66             fd.write(token)
67     return token
68 
69 
70 def _read_api_key(api_url: str, username: str = None, password: str = None) -> Optional[str]:
71     """
72     Retrieve an RGD API Key from the users environment.
73 
74     This function checks for an environment variable named RGD_API_TOKEN and returns it if it exists.
75     If it does not exist, it looks for a file located at ~/.rgd/token and returns its contents.
76     """
77     token = os.getenv('RGD_API_TOKEN', None)
78     if token is not None:
79         return token
80 
81     try:
82         # read the first line of the text file at ~/.rgd/token
83         with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:
84             api_key = fd.readline().strip()
85     except FileNotFoundError:
86         return None
87 
88     # Make sure API key works by hitting a protected endpoint
89     resp = requests.get(f'{api_url}/rgd/collection', headers={'Authorization': f'Token {api_key}'})
90 
91     # If it doesn't, try to get a new one and save it to ~/.rgd/token, as the current one is corrupted
92     if resp.status_code == 401:
93         logger.error('API key is invalid.')
94         # If username + password were provided, try to get a new API key with them
95         if username is not None and password is not None:
96             logger.info('Attempting to fetch a new API key...')
97             api_key = _get_api_key(api_url, username, password, save=True)
98             if api_key is not None:
99                 logger.info('Succeeded.')
100             return api_key
101         else:
102             logger.error('Provide your username and password next time to fetch a new one.')
103             return None
104 
105     return api_key
106 
107 
108 def create_rgd_client(
109     api_url: str = DEFAULT_RGD_API,
110     username: Optional[str] = None,
111     password: Optional[str] = None,
112     save: Optional[bool] = True,
113     extra_plugins: Optional[List[Type]] = None,
114 ):
115     # Avoid circular import
116     from ._plugin_utils import _inject_plugin_deps, _plugin_classes, _plugin_instances
117 
118     # Create initial client
119     client = RgdClient(api_url, username, password, save)
120 
121     # Perform plugin initialization
122     plugin_classes = _plugin_classes(extra_plugins=extra_plugins)
123     plugin_instances = _plugin_instances(client, plugin_classes)
124     _inject_plugin_deps(plugin_instances)
125 
126     return client
127
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/django-rgd/client/rgd_client/client.py b/django-rgd/client/rgd_client/client.py
--- a/django-rgd/client/rgd_client/client.py
+++ b/django-rgd/client/rgd_client/client.py
@@ -74,16 +74,16 @@
     This function checks for an environment variable named RGD_API_TOKEN and returns it if it exists.
     If it does not exist, it looks for a file located at ~/.rgd/token and returns its contents.
     """
-    token = os.getenv('RGD_API_TOKEN', None)
-    if token is not None:
-        return token
-
-    try:
-        # read the first line of the text file at ~/.rgd/token
-        with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:
-            api_key = fd.readline().strip()
-    except FileNotFoundError:
-        return None
+    api_key = os.getenv('RGD_API_TOKEN', None)
+    save = False
+    if api_key is None:
+        try:
+            # read the first line of the text file at ~/.rgd/token
+            with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:
+                api_key = fd.readline().strip()
+                save = True  # save any new api key to disk
+        except FileNotFoundError:
+            return None
 
     # Make sure API key works by hitting a protected endpoint
     resp = requests.get(f'{api_url}/rgd/collection', headers={'Authorization': f'Token {api_key}'})
@@ -92,7 +92,10 @@
     if resp.status_code == 401:
         logger.error('API key is invalid.')
         # If username + password were provided, try to get a new API key with them
-        if username is not None and password is not None:
+        # Note we only do this if `save` is `True`, i.e. if the user originally attempted to
+        # instantiate the client with an API key located on disk. If they instead provided an env
+        # var, do not assume that they want a key saved and do not attempt to fetch a new one.
+        if save and username is not None and password is not None:
             logger.info('Attempting to fetch a new API key...')
             api_key = _get_api_key(api_url, username, password, save=True)
             if api_key is not None:
@@ -102,6 +105,9 @@
             logger.error('Provide your username and password next time to fetch a new one.')
             return None
 
+    # If the response failed with an error status other than 401, raise an exception
+    resp.raise_for_status()
+
     return api_key
 
 
@@ -115,6 +121,10 @@
     # Avoid circular import
     from ._plugin_utils import _inject_plugin_deps, _plugin_classes, _plugin_instances
 
+    # Strip trailing slash
+    if api_url.endswith('/'):
+        api_url = api_url.rstrip('/')
+
     # Create initial client
     client = RgdClient(api_url, username, password, save)

{"golden_diff": "diff --git a/django-rgd/client/rgd_client/client.py b/django-rgd/client/rgd_client/client.py\n--- a/django-rgd/client/rgd_client/client.py\n+++ b/django-rgd/client/rgd_client/client.py\n@@ -74,16 +74,16 @@\n     This function checks for an environment variable named RGD_API_TOKEN and returns it if it exists.\n     If it does not exist, it looks for a file located at ~/.rgd/token and returns its contents.\n     \"\"\"\n-    token = os.getenv('RGD_API_TOKEN', None)\n-    if token is not None:\n-        return token\n-\n-    try:\n-        # read the first line of the text file at ~/.rgd/token\n-        with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:\n-            api_key = fd.readline().strip()\n-    except FileNotFoundError:\n-        return None\n+    api_key = os.getenv('RGD_API_TOKEN', None)\n+    save = False\n+    if api_key is None:\n+        try:\n+            # read the first line of the text file at ~/.rgd/token\n+            with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:\n+                api_key = fd.readline().strip()\n+                save = True  # save any new api key to disk\n+        except FileNotFoundError:\n+            return None\n \n     # Make sure API key works by hitting a protected endpoint\n     resp = requests.get(f'{api_url}/rgd/collection', headers={'Authorization': f'Token {api_key}'})\n@@ -92,7 +92,10 @@\n     if resp.status_code == 401:\n         logger.error('API key is invalid.')\n         # If username + password were provided, try to get a new API key with them\n-        if username is not None and password is not None:\n+        # Note we only do this if `save` is `True`, i.e. if the user originally attempted to\n+        # instantiate the client with an API key located on disk. If they instead provided an env\n+        # var, do not assume that they want a key saved and do not attempt to fetch a new one.\n+        if save and username is not None and password is not None:\n             logger.info('Attempting to fetch a new API key...')\n             api_key = _get_api_key(api_url, username, password, save=True)\n             if api_key is not None:\n@@ -102,6 +105,9 @@\n             logger.error('Provide your username and password next time to fetch a new one.')\n             return None\n \n+    # If the response failed with an error status other than 401, raise an exception\n+    resp.raise_for_status()\n+\n     return api_key\n \n \n@@ -115,6 +121,10 @@\n     # Avoid circular import\n     from ._plugin_utils import _inject_plugin_deps, _plugin_classes, _plugin_instances\n \n+    # Strip trailing slash\n+    if api_url.endswith('/'):\n+        api_url = api_url.rstrip('/')\n+\n     # Create initial client\n     client = RgdClient(api_url, username, password, save)\n", "issue": "Python client issues\n- trailing `/` on `api_url` causes failure\r\n- `create_rgd_client` silently failing if `api_url` is bad\r\n\r\n@mvandenburgh, would you please look into these\n", "before_files": [{"content": "import getpass\nimport logging\nimport os\nfrom typing import List, Optional, Type\n\nimport requests\n\nfrom .plugin import CorePlugin\nfrom .session import RgdClientSession, clone_session\nfrom .utils import API_KEY_DIR_PATH, API_KEY_FILE_NAME, DEFAULT_RGD_API\n\nlogger = logging.getLogger(__name__)\n\n\nclass RgdClient:\n    def __init__(\n        self,\n        api_url: str = DEFAULT_RGD_API,\n        username: Optional[str] = None,\n        password: Optional[str] = None,\n        save: Optional[bool] = True,\n    ) -> None:\n        \"\"\"\n        Initialize the base RGD Client.\n\n        Args:\n            api_url: The base url of the RGD API instance.\n            username: The username to authenticate to the instance with, if any.\n            password: The password associated with the provided username. If None, a prompt will be provided.\n            save: Whether or not to save the logged-in user's API key to disk for future use.\n\n        Returns:\n            A base RgdClient instance.\n        \"\"\"\n        # Look for an API key in the environment. If it's not there, check username/password\n        api_key = _read_api_key(api_url=api_url, username=username, password=password)\n        if api_key is None:\n            if username is not None and password is None:\n                password = getpass.getpass()\n\n            # Get an API key for this user and save it to disk\n            if username and password:\n                api_key = _get_api_key(api_url, username, password, save)\n                if api_key is None:\n                    logger.error(\n                        'Failed to retrieve API key; are your username and password correct?'\n                    )\n\n        self.session = RgdClientSession(base_url=api_url, auth_token=api_key)\n        self.rgd = CorePlugin(clone_session(self.session))\n\n    def clear_token(self):\n        \"\"\"Delete a locally-stored API key.\"\"\"\n        (API_KEY_DIR_PATH / API_KEY_FILE_NAME).unlink(missing_ok=True)\n\n\ndef _get_api_key(api_url: str, username: str, password: str, save: bool) -> Optional[str]:\n    \"\"\"Get an RGD API Key for the given user from the server, and save it if requested.\"\"\"\n    resp = requests.post(f'{api_url}/api-token-auth', {'username': username, 'password': password})\n    token = resp.json().get('token')\n    if token is None:\n        return None\n    if save:\n        API_KEY_DIR_PATH.mkdir(parents=True, exist_ok=True)\n        with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'w') as fd:\n            fd.write(token)\n    return token\n\n\ndef _read_api_key(api_url: str, username: str = None, password: str = None) -> Optional[str]:\n    \"\"\"\n    Retrieve an RGD API Key from the users environment.\n\n    This function checks for an environment variable named RGD_API_TOKEN and returns it if it exists.\n    If it does not exist, it looks for a file located at ~/.rgd/token and returns its contents.\n    \"\"\"\n    token = os.getenv('RGD_API_TOKEN', None)\n    if token is not None:\n        return token\n\n    try:\n        # read the first line of the text file at ~/.rgd/token\n        with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:\n            api_key = fd.readline().strip()\n    except FileNotFoundError:\n        return None\n\n    # Make sure API key works by hitting a protected endpoint\n    resp = requests.get(f'{api_url}/rgd/collection', headers={'Authorization': f'Token {api_key}'})\n\n    # If it doesn't, try to get a new one and save it to ~/.rgd/token, as the current one is corrupted\n    if resp.status_code == 401:\n        logger.error('API key is invalid.')\n        # If username + password were provided, try to get a new API key with them\n        if username is not None and password is not None:\n            logger.info('Attempting to fetch a new API key...')\n            api_key = _get_api_key(api_url, username, password, save=True)\n            if api_key is not None:\n                logger.info('Succeeded.')\n            return api_key\n        else:\n            logger.error('Provide your username and password next time to fetch a new one.')\n            return None\n\n    return api_key\n\n\ndef create_rgd_client(\n    api_url: str = DEFAULT_RGD_API,\n    username: Optional[str] = None,\n    password: Optional[str] = None,\n    save: Optional[bool] = True,\n    extra_plugins: Optional[List[Type]] = None,\n):\n    # Avoid circular import\n    from ._plugin_utils import _inject_plugin_deps, _plugin_classes, _plugin_instances\n\n    # Create initial client\n    client = RgdClient(api_url, username, password, save)\n\n    # Perform plugin initialization\n    plugin_classes = _plugin_classes(extra_plugins=extra_plugins)\n    plugin_instances = _plugin_instances(client, plugin_classes)\n    _inject_plugin_deps(plugin_instances)\n\n    return client\n", "path": "django-rgd/client/rgd_client/client.py"}], "after_files": [{"content": "import getpass\nimport logging\nimport os\nfrom typing import List, Optional, Type\n\nimport requests\n\nfrom .plugin import CorePlugin\nfrom .session import RgdClientSession, clone_session\nfrom .utils import API_KEY_DIR_PATH, API_KEY_FILE_NAME, DEFAULT_RGD_API\n\nlogger = logging.getLogger(__name__)\n\n\nclass RgdClient:\n    def __init__(\n        self,\n        api_url: str = DEFAULT_RGD_API,\n        username: Optional[str] = None,\n        password: Optional[str] = None,\n        save: Optional[bool] = True,\n    ) -> None:\n        \"\"\"\n        Initialize the base RGD Client.\n\n        Args:\n            api_url: The base url of the RGD API instance.\n            username: The username to authenticate to the instance with, if any.\n            password: The password associated with the provided username. If None, a prompt will be provided.\n            save: Whether or not to save the logged-in user's API key to disk for future use.\n\n        Returns:\n            A base RgdClient instance.\n        \"\"\"\n        # Look for an API key in the environment. If it's not there, check username/password\n        api_key = _read_api_key(api_url=api_url, username=username, password=password)\n        if api_key is None:\n            if username is not None and password is None:\n                password = getpass.getpass()\n\n            # Get an API key for this user and save it to disk\n            if username and password:\n                api_key = _get_api_key(api_url, username, password, save)\n                if api_key is None:\n                    logger.error(\n                        'Failed to retrieve API key; are your username and password correct?'\n                    )\n\n        self.session = RgdClientSession(base_url=api_url, auth_token=api_key)\n        self.rgd = CorePlugin(clone_session(self.session))\n\n    def clear_token(self):\n        \"\"\"Delete a locally-stored API key.\"\"\"\n        (API_KEY_DIR_PATH / API_KEY_FILE_NAME).unlink(missing_ok=True)\n\n\ndef _get_api_key(api_url: str, username: str, password: str, save: bool) -> Optional[str]:\n    \"\"\"Get an RGD API Key for the given user from the server, and save it if requested.\"\"\"\n    resp = requests.post(f'{api_url}/api-token-auth', {'username': username, 'password': password})\n    token = resp.json().get('token')\n    if token is None:\n        return None\n    if save:\n        API_KEY_DIR_PATH.mkdir(parents=True, exist_ok=True)\n        with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'w') as fd:\n            fd.write(token)\n    return token\n\n\ndef _read_api_key(api_url: str, username: str = None, password: str = None) -> Optional[str]:\n    \"\"\"\n    Retrieve an RGD API Key from the users environment.\n\n    This function checks for an environment variable named RGD_API_TOKEN and returns it if it exists.\n    If it does not exist, it looks for a file located at ~/.rgd/token and returns its contents.\n    \"\"\"\n    api_key = os.getenv('RGD_API_TOKEN', None)\n    save = False\n    if api_key is None:\n        try:\n            # read the first line of the text file at ~/.rgd/token\n            with open(API_KEY_DIR_PATH / API_KEY_FILE_NAME, 'r') as fd:\n                api_key = fd.readline().strip()\n                save = True  # save any new api key to disk\n        except FileNotFoundError:\n            return None\n\n    # Make sure API key works by hitting a protected endpoint\n    resp = requests.get(f'{api_url}/rgd/collection', headers={'Authorization': f'Token {api_key}'})\n\n    # If it doesn't, try to get a new one and save it to ~/.rgd/token, as the current one is corrupted\n    if resp.status_code == 401:\n        logger.error('API key is invalid.')\n        # If username + password were provided, try to get a new API key with them\n        # Note we only do this if `save` is `True`, i.e. if the user originally attempted to\n        # instantiate the client with an API key located on disk. If they instead provided an env\n        # var, do not assume that they want a key saved and do not attempt to fetch a new one.\n        if save and username is not None and password is not None:\n            logger.info('Attempting to fetch a new API key...')\n            api_key = _get_api_key(api_url, username, password, save=True)\n            if api_key is not None:\n                logger.info('Succeeded.')\n            return api_key\n        else:\n            logger.error('Provide your username and password next time to fetch a new one.')\n            return None\n\n    # If the response failed with an error status other than 401, raise an exception\n    resp.raise_for_status()\n\n    return api_key\n\n\ndef create_rgd_client(\n    api_url: str = DEFAULT_RGD_API,\n    username: Optional[str] = None,\n    password: Optional[str] = None,\n    save: Optional[bool] = True,\n    extra_plugins: Optional[List[Type]] = None,\n):\n    # Avoid circular import\n    from ._plugin_utils import _inject_plugin_deps, _plugin_classes, _plugin_instances\n\n    # Strip trailing slash\n    if api_url.endswith('/'):\n        api_url = api_url.rstrip('/')\n\n    # Create initial client\n    client = RgdClient(api_url, username, password, save)\n\n    # Perform plugin initialization\n    plugin_classes = _plugin_classes(extra_plugins=extra_plugins)\n    plugin_instances = _plugin_instances(client, plugin_classes)\n    _inject_plugin_deps(plugin_instances)\n\n    return client\n", "path": "django-rgd/client/rgd_client/client.py"}]}