casdoor-react-sdk

casdoor-react-sdk

It can help you quickly build a silent sign-in application based on Casdoor.

We have an implemented example: casdoor-spring-security-react-example.

To use this sdk just follow the steps below.

Installation

#NPM
npm i casdoor-react-sdk

#YARN
yarn add casdoor-react-sdk

Use in React

Let's take a look at the following example of a silent sign-in.

First, you need to initialize the Casdoor SDK.

import Sdk from "casdoor-js-sdk";

export const ServerUrl = "http://localhost:7023";

const sdkConfig = {
  serverUrl: "http://localhost:8000",
  clientId: "d79fd3c4e09a309fb3f5123",
  appName: "application_hnpzib",
  organizationName: "organization_4emn5k",
  redirectPath: "/callback",
  signinPath: "/api/signin",
};

export const CasdoorSDK = new Sdk(sdkConfig);

Then, intercept the /callback path in your application, the AuthCallback component will help you automatically handle the logic of interacting with the server, you just need to make sure that your server ServerUrl implements the ${ServerUrl}/api/signin api, and takes two parameters code and state, and returns token.

Note: Here you need to implement the saveTokenFromResponse and isGetTokenSuccessful functions.

• isGetTokenSuccessful：you need to judge from the response data whether the request is processed successfully by the server.
• saveTokenFromResponse：when your ${ServerUrl}/api/signin api successfully returns the token, you need to save the token.

import { Route, BrowserRouter, Routes } from "react-router-dom";
import { AuthCallback } from "casdoor-react-sdk";
import * as Setting from "./Setting";
import HomePage from "./HomePage";

function App() {
  const authCallback = (
    <AuthCallback
      sdk={Setting.CasdoorSDK}
      serverUrl={Setting.ServerUrl}
      saveTokenFromResponse={(res) => {
        // @ts-ignore
        // save token
        localStorage.setItem("token", res.data.accessToken);
      }}
      isGetTokenSuccessful={(res) => {
        // @ts-ignore
        // according to the data returned by the server,
        // determine whether the `token` is successfully obtained through `code` and `state`.
        return res.success === true;
      }}
    />
  );

  return (
    <BrowserRouter>
      <Routes>
        <Route path="/callback" element={authCallback} />
        <Route path="/" element={<HomePage />} />
      </Routes>
    </BrowserRouter>
  );
}

export default App;

In your HomePage to determine whether you need to log in silently, if you need to log in silently, return the SilentSignin component, it will help you initiate a login request, and after the login is successful, it will call the handleReceivedSilentSigninSuccessEvent function, and when the login fails, it will also Call the handleReceivedSilentSigninFailureEvent function.

import * as Setting from "./Setting";
import { SilentSignin, isSilentSigninRequired } from "casdoor-react-sdk";

function HomePage() {
  const isLoggedIn = () => {
    return localStorage.getItem("token") !== null;
  };

  if (isSilentSigninRequired()) {
    // if the `silentSignin` parameter exists, perform silent login processing
    return (
      <SilentSignin
        sdk={Setting.CasdoorSDK}
        isLoggedIn={isLoggedIn}
        handleReceivedSilentSigninSuccessEvent={() => {
          // jump to the home page here and clear silentSignin parameter
          window.location.href = "/";
        }}
        handleReceivedSilentSigninFailureEvent={() => {
          // prompt the user to log in failed here
          alert("login failed");
        }}
      />
    );
  }

  const renderContent = () => {
    if (isLoggedIn()) {
      return <div>Hello!</div>;
    } else {
      return <div>you are not logged in</div>;
    }
  };

  return renderContent();
}

export default HomePage;