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Easy User Authentication for React Apps
This repository hosts a React project that defines a Single-Page Application (SPA). You'll secure access to some of its routes using Auth0 User Authentication.
Get Started
Install the client project dependencies:
npm install
Set Up Authentication with Auth0
If you haven't already, sign up for a free Auth0 account.
Once you sign in, Auth0 takes you to the Dashboard. In the left sidebar menu, click on "Applications".
Then, click the "Create Application" button. A modal opens up with a form to provide a name for the application and choose its type.
-
Name: Auth0 React Sample
-
Application Type: Single Page Web Applications
Click the "Create" button to complete the process. Your Auth0 application page loads up.
Your React application will redirect users to Auth0 whenever they trigger an authentication request. Auth0 will present them with a login page. Once they log in, Auth0 will redirect them back to your React application. For that redirecting to happen securely, you must specify in your Auth0 Application Settings the URLs to which Auth0 can redirect users once it authenticates them.
As such, click on the "Settings" tab of your Auth0 Application page and fill in the following values:
Allowed Callback URLs
http://localhost:4040
Allowed Logout URLs
http://localhost:4040
Allowed Web Origins
http://localhost:4040
Scroll down and click the "Save Changes" button.
Open the React starter project, auth0-react-sample
, and create a .env
file under the project directory:
touch .env
Populate .env
as follows:
REACT_APP_AUTH0_DOMAIN=
REACT_APP_AUTH0_CLIENT_ID=
REACT_APP_AUTH0_AUDIENCE=https://express.sample
REACT_APP_SERVER_URL=http://localhost:6060
The value of REACT_APP_AUTH0_DOMAIN
is the "Domain" value from the "Settings".
The value of REACT_APP_AUTH0_CLIENT_ID
is the "Client ID" value from the "Settings".
Run the Project
Run the client project:
npm start
The application runs by on port 4040
to mitigate conflicting with other client applications you may be running.
Visit http://localhost:4040/
to access the starter application.
Set up the Demo API
You can set up this Express demo server to test making secure API calls from your React application.
Get the Express API demo
Clone the auth0-express-js-sample
repo:
git clone [email protected]:auth0-blog/auth0-express-js-sample.git
Make the auth0-express-js-sample
directory your current directory:
cd auth0-express-js-sample
Install the Node.js project dependencies:
npm install
Connect the Express API with Auth0
Head to the APIs section in the Auth0 Dashboard, and click the "Create API" button.
Then, in the form that Auth0 shows:
- Add a Name to your API:
Auth0 Express Sample
- Set its Identifier value:
https://express.sample
- Leave the signing algorithm as
RS256
as it's the best option from a security standpoint.
With these values in place, hit the "Create" button.
Keep this page open as you'll be using the values next.
Create a .env
file for the API Server under the auth0-express-js-sample
directory:
touch .env
Populate this auth0-express-js-sample/.env
file as follows:
SERVER_PORT=6060
CLIENT_ORIGIN_URL=http://localhost:4040
AUTH0_AUDIENCE=
AUTH0_DOMAIN=
Head back to your Auth0 API page, and follow these steps to get the Auth0 Audience:
-
Click on the "Settings" tab.
-
Locate the "Identifier" field and copy its value.
-
Paste the "Identifier" value as the value of
AUTH0_AUDIENCE
in.env
.
Now, follow these steps to get the Auth0 Domain value:
- Click on the "Test" tab.
- Locate the section called "Asking Auth0 for tokens from my application".
- Click on the cURL tab to show a mock
POST
request. - Copy your Auth0 domain, which is part of the
--url
parameter value:tenant-name.region.auth0.com
. - Paste the Auth0 domain value as the value of
AUTH0_DOMAIN
in.env
.
Tips to get the Auth0 Domain
- The Auth0 Domain is the substring between the protocol,
https://
and the path/oauth/token
.- The Auth0 Domain follows this pattern:
tenant-name.region.auth0.com
.- The
region
subdomain (au
,us
, oreu
) is optional. Some Auth0 Domains don't have it.
With the .env
configuration values set, run the API server by issuing the following command:
npm start