Lovable and Backblaze B2 Cloud Storage integration: Step-by-Step Guide 2025

 

Adding Backblaze B2 as a Dependency in Lovable

 

• Since Lovable does not have a terminal, you need to manually add the dependency to your project's configuration file. Open your package.json file and add the following dependency entry:

{
  "dependencies": {
    "backblaze-b2": "^2.0.0"
  }
}
  

• This will instruct Lovable’s build system to fetch the Backblaze B2 library when it compiles your project.

 

Creating the Backblaze Service File

 

• Create a new file in your project under the src folder called backblazeService.ts. This file will contain all the functions and configurations necessary to interact with Backblaze B2.
• Paste the following code into src/backblazeService.ts:

import B2 from 'backblaze-b2';

export interface B2Config {
  accountId: string;
  applicationKey: string;
  bucketId: string;
}
export class BackblazeService {
  private b2: B2;
  private bucketId: string;
  constructor(config: B2Config) {
    // Initialize the B2 client with your account credentials
    this.b2 = new B2({
      accountId: config.accountId,
      applicationKey: config.applicationKey
    });
    this.bucketId = config.bucketId;
  }
  // Authorize with Backblaze B2
  public async authorize(): Promise {
    try {
      await this.b2.authorize();
    } catch (error) {
      console.error('Authorization failed:', error);
      throw error;
    }
  }
  // Upload a file to the configured bucket
  public async uploadFile(fileName: string, fileData: Buffer | Blob): Promise {
    try {
      // Get upload URL and auth token
      const uploadUrlResponse = await this.b2.getUploadUrl({ bucketId: this.bucketId });
      const { uploadUrl, authorizationToken } = uploadUrlResponse.data;
  // Upload file
  const uploadResponse = await this.b2.uploadFile({
    uploadUrl,
    uploadAuthToken: authorizationToken,
    fileName,
    data: fileData
  });
  return uploadResponse.data;
} catch (error) {
  console.error('Upload failed:', error);
  throw error;
}

  }
}
  



• This file creates a BackblazeService class with methods to authorize and upload files. You can extend this code with additional functions if needed.

 

Integrating Backblaze Service with Your Lovable Code

 

• Open the file where you want to integrate file upload functionality. For example, if you have a module that handles media uploads, open that file (e.g., src/fileUploader.ts).
• Import the BackblazeService and configure it with your Backblaze credentials. Add the following code at the top of your file:

// Import the Backblaze service
import { BackblazeService, B2Config } from './backblazeService';

// Set up your Backblaze credentials
const b2Config: B2Config = {
  accountId: 'YOURACCOUNTID',
  applicationKey: 'YOURAPPLICATIONKEY',
  bucketId: 'YOURBUCKETID'
};
// Initialize the Backblaze service instance
const backblazeService = new BackblazeService(b2Config);
// Authorize with Backblaze when your module initializes
backblazeService.authorize().then(() => {
  console.log('Backblaze authorized successfully.');
}).catch((error) => {
  console.error('Error during Backblaze authorization:', error);
});
  



• This code snippet sets up the Backblaze service when your module loads. Replace YOURACCOUNTID, YOURAPPLICATIONKEY, and YOURBUCKETID with your actual Backblaze credentials.

 

Uploading a File to Backblaze B2

 

• Within the same file (src/fileUploader.ts) or any other appropriate module, add a function that uses the BackblazeService to upload a file. For example:

export async function handleFileUpload(file: File): Promise {
  try {
    // Convert the File (from an input element) into a Blob or Buffer
    const fileData = await file.arrayBuffer();
    const bufferData = Buffer.from(fileData);

// Call the uploadFile method
const response = await backblazeService.uploadFile(file.name, bufferData);
console.log('File uploaded successfully:', response);

  } catch (error) {
    console.error('Error during file upload:', error);
  }
}
  



• This function takes a File object (which you might get from an HTML file input) and uploads it to Backblaze. Ensure you adjust the logic if your file data is already in a suitable format.

 

Wiring the Upload Function to Your User Interface

 

• If your Lovable project has a UI component where the user selects a file for uploading, locate that component file (for example, src/components/UploadComponent.tsx).
• Import the handleFileUpload function at the top of the component file:

import { handleFileUpload } from '../fileUploader';
  

• Add an event handler for the file input element that calls handleFileUpload when a file is selected. For example:

function onFileChange(event: React.ChangeEvent): void {
  const files = event.target.files;
  if (files && files[0]) {
    handleFileUpload(files[0]);
  }
}
  

• Ensure your file input element is linked to this handler, for example:

  
  <input type="file" onChange={onFileChange} />
      

 

Final Steps and Testing

 

• Review all the changes and ensure your Backblaze credentials are correct.
• Save all the files. Lovable’s build system should automatically pick up the new dependency from your package.json and compile your TypeScript files.
• When running your project, trigger a file upload through your front-end. Open your browser’s console to see the success or error logs provided by the Backblaze service integration.