Add auth info to auth page

docs/extending-locust.rst

@@ -154,7 +154,9 @@ to the ``login_manager``. The ``user_loader`` should return ``None`` to deny aut
 authentication to the app should be granted.
 
 To display errors on the login page, such as an incorrect username / password combination, you may store the ``auth_error``
-on the session object: ``session["auth_error"] = "Incorrect username or password"``.
+on the session object: ``session["auth_error"] = "Incorrect username or password"``. If you have non-erroneous information
+you would like to display to the user, you can opt instead to set ``auth_info`` on the session object:
+``session["auth_info"] = "Successfully created new user!"``
 
 A full example can be seen `in the auth example <https://github.com/locustio/locust/tree/master/examples/web_ui_auth/basic.py>`_.
 

locust/web.py

@@ -11,7 +11,7 @@
 from itertools import chain
 from json import dumps
 from time import time
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any, TypedDict
 
 import gevent
 from flask import (
@@ -53,6 +53,34 @@
 DEFAULT_CACHE_TIME = 2.0
 
 
+class InputField(TypedDict):
+    label: str
+    name: str
+    default_value: bool | None
+    choices: list[str] | None
+    is_secret: bool | None
+
+
+class CustomForm(TypedDict):
+    inputs: list[InputField] | None
+    callback_url: str
+    submit_button_text: str | None
+
+
+class AuthProvider(TypedDict):
+    label: str | None
+    callback_url: str
+    icon_url: str | None
+
+
+class AuthArgs(TypedDict, total=False):
+    custom_form: CustomForm
+    auth_providers: AuthProvider
+    username_password_callback: str
+    error: str
+    info: str
+
+
 class WebUI:
     """
     Sets up and runs a Flask web app that can start and stop load tests using the
@@ -84,7 +112,7 @@ def my_custom_route():
     """Arguments used to render index.html for the web UI. Must be used with custom templates
     extending index.html."""
 
-    auth_args: dict[str, Any]
+    auth_args: AuthArgs
     """Arguments used to render auth.html for the web UI auth page. Must be used when configuring auth"""
 
     def __init__(
@@ -506,6 +534,7 @@ def login():
                 return redirect(url_for("index"))
 
             self.auth_args["error"] = session.get("auth_error", None)
+            self.auth_args["info"] = session.get("auth_info", None)
 
             return render_template_from(
                 "auth.html",
@@ -577,6 +606,7 @@ def wrapper(*args, **kwargs):
             if self.web_login:
                 try:
                     session["auth_error"] = None
+                    session["auth_info"] = None
                     return login_required(view_func)(*args, **kwargs)
                 except Exception as e:
                     return f"Locust auth exception: {e} See https://docs.locust.io/en/stable/extending-locust.html#adding-authentication-to-the-web-ui for configuring authentication."

locust/webui/src/pages/Auth.tsx

@@ -13,6 +13,7 @@ export default function Auth({
   authProviders,
   customForm,
   error,
+  info,
   usernamePasswordCallback,
 }: IAuthArgs) {
   const theme = useCreateTheme();
@@ -36,6 +37,7 @@ export default function Auth({
           rowGap: 4,
           boxShadow: 24,
           borderRadius: 4,
+          width: 400,
           border: '3px solid black',
           p: 4,
         }}
@@ -48,6 +50,7 @@ export default function Auth({
             <Box sx={{ display: 'flex', flexDirection: 'column', rowGap: 2 }}>
               <TextField label='Username' name='username' />
               <PasswordField />
+              {info && <Alert severity='info'>{info}</Alert>}
               {error && <Alert severity='error'>{error}</Alert>}
               <Button size='large' type='submit' variant='contained'>
                 Login
@@ -61,6 +64,7 @@ export default function Auth({
               {customForm.inputs.map((inputProps, index) => (
                 <CustomInput key={`custom-form-input-${index}`} {...inputProps} />
               ))}
+              {info && <Alert severity='info'>{info}</Alert>}
               {error && <Alert severity='error'>{error}</Alert>}
               <Button size='large' type='submit' variant='contained'>
                 {customForm.submitButtonText || 'Login'}

locust/webui/src/types/auth.types.ts

@@ -9,6 +9,7 @@ export interface IAuthProviders {
 export interface IAuthArgs {
   usernamePasswordCallback?: string;
   error?: string;
+  info?: string;
   authProviders?: IAuthProviders[];
   customForm?: {
     inputs: ICustomInput[];