prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <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
  
  </issue>
  <code>
  [start of django-rgd/client/rgd_client/client.py]
  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 of django-rgd/client/rgd_client/client.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: 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)
  
verification_info: {"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"}]}