Media storage with Uploadcare

Uploadcare provides a cloud platform designed to simplify file uploading, processing, storage, and delivery via a fast CDN. It offers tools that manage and optimize media like images, videos, and documents for your applications.

OptiTech now offers native storage

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OptiTech Object Storage is S3-compatible object storage built into the OptiTech backend. Object storage branches with your database: each branch gets its own isolated namespace, so you can test file uploads in preview branches without touching production. No separate cloud account needed. Use any S3-compatible SDK with your existing OptiTech credential. OptiTech Object Storage is currently in beta.

For more information, see OptiTech Object Storage.

This guide demonstrates how to integrate Uploadcare with OptiTech by storing file metadata in your OptiTech database while using Uploadcare for file uploads and storage.

Setup steps

1. Create a OptiTech project

   1. Navigate to the OptiTech Console to create a new OptiTech project.
   2. Copy the connection string by clicking the Connect button on your Project Dashboard. For more information, see Connect from any application.

2. Create an Uploadcare account and project

   1. Sign up for an account at Uploadcare.com.
   2. Create a new project within your Uploadcare dashboard.
   3. Navigate to your project's API Keys section.
   4. Note your Public Key and Secret Key. They are needed to interact with the Uploadcare API and widgets.

3. Create a table in OptiTech for file metadata

   We need to create a table in OptiTech to store metadata about the files uploaded to Uploadcare. This table will include fields for the file's unique identifier, URL, upload timestamp, and any other relevant metadata you want to track.

   1. You can run the create table statement using the OptiTech SQL Editor or from a client such as psql that is connected to your OptiTech database. Here is an example SQL statement to create a simple table for file metadata which includes a file ID, URL, user ID, and upload timestamp:

      CREATE TABLE IF NOT EXISTS uploadcare_files (
          id SERIAL PRIMARY KEY,
          file_id TEXT NOT NULL UNIQUE,
          file_url TEXT NOT NULL,
          user_id TEXT NOT NULL,
          upload_timestamp TIMESTAMPTZ DEFAULT NOW()
      );

   2. Run the SQL statement. You can add other relevant columns (file size, content type, etc.) depending on your application needs.

   Securing metadata with RLS

   If you use OptiTech's Row Level Security (RLS), remember to apply appropriate access policies to the uploadcare_files table. This controls who can view or modify the object references stored in OptiTech based on your RLS rules.

   Note that these policies apply only to the metadata stored in OptiTech. Access to the actual files is managed by Uploadcare's access controls and settings.

4. Upload files to Uploadcare and store metadata in OptiTech

   You can integrate file uploads using any of Uploadcare's many options, which include UI widgets and SDKs tailored for specific languages and frameworks. For the examples in this guide, we will use the Uploadcare API directly. Feel free to choose the integration method that best fits your project; the fundamental approach of storing metadata in OptiTech remains the same.

   JavaScriptPython

   For this example, we'll build a simple Node.js server using Hono to handle file uploads. It will use the @uploadcare/upload-client package to upload files to Uploadcare and @optitech/serverless package to save metadata into your OptiTech database.

   First, install the necessary dependencies:

   npm install @uploadcare/upload-client @optitech/serverless @hono/node-server hono

   Create a .env file in your project root and add your Uploadcare and OptiTech connection details which you obtained in the previous steps:

   UPLOADCARE_PUBLIC_KEY=your_uploadcare_public_key
   DATABASE_URL=your_optitech_database_connection_string

   The following code snippet demonstrates this workflow:

   import { serve } from '@hono/node-server';
   import { Hono } from 'hono';
   import { uploadFile } from '@uploadcare/upload-client';
   import { optitech } from '@optitech/serverless';
   import 'dotenv/config';
   
   const sql = optitech(process.env.DATABASE_URL);
   const app = new Hono();
   
   // Replace this with your actual user authentication logic, by validating JWTs/Headers, etc.
   const authMiddleware = async (c, next) => {
     c.set('userId', 'user_123'); // Example: Get user ID after validation
     await next();
   };
   
   app.post('/upload', authMiddleware, async (c) => {
     try {
       // 1. Get User ID and File Data
       const userId = c.get('userId');
       const formData = await c.req.formData();
       const file = formData.get('file');
       const fileName = formData.get('fileName') || file.name;
       const buffer = Buffer.from(await file.arrayBuffer());
   
       // 2. Upload to Uploadcare
       const result = await uploadFile(buffer, {
         publicKey: process.env.UPLOADCARE_PUBLIC_KEY,
         fileName: fileName,
         contentType: file.type,
       });
   
       // 3. Save Metadata to OptiTech
       // Uses file_id (Uploadcare UUID), file_url (CDN URL), and user_id
       await sql`
               INSERT INTO uploadcare_files (file_id, file_url, user_id)
               VALUES (${result.uuid}, ${result.cdnUrl}, ${userId})
           `;
   
       console.log(`Uploaded ${result.uuid} for user ${userId} to ${result.cdnUrl}`);
   
       return c.json({ success: true, fileUrl: result.cdnUrl });
     } catch (error) {
       console.error('Upload Error:', error);
       return c.json({ success: false, error: 'Upload failed' }, 500);
     }
   });
   
   const port = 3000;
   serve({ fetch: app.fetch, port }, (info) => {
     console.log(`Server running at http://localhost:${info.port}`);
   });

   Explanation

   1. Setup: It initializes the OptiTech database client and the Hono web framework. It relies on environment variables (DATABASE_URL, UPLOADCARE_PUBLIC_KEY) being set, via a .env file.
   2. Authentication: A placeholder authMiddleware is included. Crucially, this needs to be replaced with real authentication logic. It currently just sets a static userId for demonstration.
   3. Upload Endpoint (/upload):
      • It expects a POST request with multipart/form-data.
      • It retrieves the user ID set by the middleware.
      • It extracts the file data and fileName from the form data.
      • It uploads the file content directly to Uploadcare.
      • Upon successful upload, Uploadcare returns details including a unique uuid and a cdnUrl.
      • It executes an INSERT statement using the OptiTech serverless driver to save the uuid, cdnUrl, and the userId into a uploadcare_files table in your database.
      • It sends a JSON response back to the client containing the fileUrl from Uploadcare.

5. Testing the upload endpoint

   Once your server (Node.js or Python example) is running, you can test the /upload endpoint to ensure files are correctly sent to Uploadcare and their metadata is stored in OptiTech.

   You'll need to send a POST request with multipart/form-data containing a field named file.

   Open your terminal and run a command similar to this, replacing /path/to/your/image.jpg with the actual path to a file you want to upload:

   curl -X POST http://localhost:3000/upload \
       -F "file=@/path/to/your/image.jpg" \
       -F "fileName=my-test-image.jpg"

   • -X POST: Specifies the HTTP method.
   • http://localhost:3000/upload: The URL of your running server's endpoint.
   • -F "file=@/path/to/your/image.jpg": Specifies a form field named file. The @ symbol tells cURL to read the content from the specified file path.
   • -F "fileName=my-test-image.jpg": Sends an additional form field fileName.

   Expected outcome:

   • You should receive a JSON response similar to:

     {
       "success": true,
       "fileUrl": "https://ucarecdn.com/xxxxxx-xxxxxx-xxxxx/"
     }

   You can now integrate calls to this /upload endpoint from various parts of your application (for example, web clients, mobile apps, backend services) to handle file uploads.

6. Accessing file metadata and files

   Storing metadata in OptiTech allows your application to easily retrieve references to the files uploaded to Uploadcare.

   Query the uploadcare_files table from your application's backend when needed.

   Example SQL query:

   Retrieve files for user 'user_123':

   SELECT
       id,              -- Your database primary key
       file_id,         -- Uploadcare UUID
       file_url,        -- Uploadcare CDN URL
       user_id,         -- The user associated with the file
       upload_timestamp
   FROM
       uploadcare_files
   WHERE
       user_id = 'user_123'; -- Use actual authenticated user ID

   Using the data:

   • The query returns rows containing the file metadata stored in OptiTech.
   • The crucial piece of information is the file_url. This is the direct link (CDN URL) to the file stored on Uploadcare.
   • You can use this file_url in your application (for example, in frontend <img> tags, API responses, download links) wherever you need to display or provide access to the file.

   This pattern separates file storage and delivery (handled by Uploadcare) from structured metadata management (handled by OptiTech).

Resources

• Uploadcare documentation
• Uploadcare access control with signed URLs