Lovable and Withings integration: Step-by-Step Guide 2025

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How to integrate Lovable with Withings?

Setting Up the Withings Integration File

Create a new file in your Lovable project called withingsIntegration.ts (for example, under your src/ folder). This file will include all the TypeScript code necessary to communicate with Withings.

Copy and paste the following code into this file. It defines functions to generate the Withings OAuth URL, request an access token after the user authorizes, and fetch measurement data:


import axios from 'axios';

interface WithingsTokenResponse {
  access_token: string;
  refresh_token: string;
  expires_in: number;
}
const CLIENTID = 'YOURWITHINGSCLIENTID';
const CLIENTSECRET = 'YOURWITHINGSCLIENTSECRET';
const REDIRECTURI = 'YOURLOVABLEREDIRECTURI';
export function getWithingsAuthUrl(): string {
  const scope = 'user.metrics';
  const state = Math.random().toString(36).substring(7);
  return https://account.withings.com/oauth2_user/authorize2?response_type=code&client_id=${CLIENT_ID}&redirect_uri=${encodeURIComponent(REDIRECT_URI)}&state=${state}&scope=${scope};
}
export async function requestWithingsToken(code: string): Promise {
  try {
    const response = await axios.post('https://account.withings.com/oauth2/token', null, {
      params: {
        granttype: 'authorizationcode',
        clientid: CLIENTID,
        clientsecret: CLIENTSECRET,
        code: code,
        redirecturi: REDIRECTURI
      }
    });
    return response.data;
  } catch (error) {
    throw new Error('Error fetching token from Withings');
  }
}
export async function fetchMeasurementData(accessToken: string): Promise {
  try {
    const response = await axios.get('https://wbsapi.withings.net/measure', {
      params: {
        action: 'getmeas',
        access_token: accessToken
      }
    });
    return response.data;
  } catch (error) {
    throw new Error('Error fetching measurement data');
  }
}

Adding Axios Dependency Without a Terminal

Since Lovable doesn't provide a terminal for dependency installation, add Axios manually by including it in your HTML file. Open the main HTML file used by your Lovable project (commonly named index.html).
Within the <head> section, insert the following script tag:
```
    
```
This will load Axios into your project so that the TypeScript code (when compiled) can use it for HTTP requests.

Integrating the Withings Connection into the User Interface

Locate the file where your Lovable project's user interface is defined (this might be a component file such as main.ts or similar).

Add a new button labelled "Connect Withings". When clicked, this button will open the Withings authorization URL in a new window. Insert the following code snippet into your UI component:


// Import the Withings integration function
import { getWithingsAuthUrl } from './withingsIntegration';

// Assuming you have a function that initializes your interface
function setupUI() {
  // Create the Connect Withings button
  const withingsBtn = document.createElement('button');
  withingsBtn.textContent = 'Connect Withings';
  withingsBtn.onclick = function() {
    // Open the Withings OAuth URL in a new window
    window.open(getWithingsAuthUrl(), '_blank');
  };
  document.body.appendChild(withingsBtn);
}
setupUI();

This code creates a button, and on click, it opens the Withings OAuth authorization page where users can log in and authorize access.

Handling the OAuth Callback in Lovable

Create another file named withingsCallback.ts (or use your existing routing/logic file if Lovable already has one for handling redirects). This file will process the OAuth callback response containing the authorization code.

Paste in the following code which extracts the authorization code from the URL and uses it to request an access token:


import { requestWithingsToken } from './withingsIntegration';

// A function to parse URL query parameters
function parseQueryParams(): { [key: string]: string } {
  const params: { [key: string]: string } = {};
  window.location.search.substring(1).split('&').forEach(pair => {
    const [key, value] = pair.split('=');
    params[decodeURIComponent(key)] = decodeURIComponent(value || '');
  });
  return params;
}
// Run this function if the callback URL is detected
function handleWithingsCallback() {
  const params = parseQueryParams();
  if (params['code']) {
    requestWithingsToken(params['code'])
      .then(tokenData => {
        // Save tokenData as needed (for example, in local storage or pass it to another function)
        console.log('Received token:', tokenData);
        // Optionally, fetch measurement data with the new token
        // fetchMeasurementData(tokenData.access_token).then(data => console.log(data));
      })
      .catch(error => {
        console.error('Error during Withings token retrieval:', error);
      });
  }
}
// Execute the callback handler if the URL contains the OAuth parameters
handleWithingsCallback();

This file should be configured to load when users are redirected back to your Lovable project from the Withings OAuth page. Make sure the REDIRECT_URI constant in withingsIntegration.ts matches the URL where this file is accessible.

Finalizing the Integration

Ensure that your Lovable project routing or the page configuration loads withingsCallback.ts when the OAuth redirect takes place.
Review and update the constants (CLIENTID, CLIENTSECRET, and REDIRECT_URI) in withingsIntegration.ts with the actual values provided by Withings.
Test the entire flow by clicking "Connect Withings", authorizing the application on Withings, and verifying that the token and subsequent data are logged to the console.

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