# OneDrive ↔ Google Drive Streamer

A secure, high-performance application to stream files bidirectionally between Microsoft OneDrive and Google Drive. 
Now powered by a **Node.js Express backend** for reliable server-side streaming and token management.

## Features

- � **Bidirectional Transfers**: Move files from OneDrive to Google Drive AND Google Drive to OneDrive.
- 🚀 **Server-Side Streaming**: Files are piped directly between cloud providers on the server, ensuring faster and more reliable transfers for large files.
- � **Secure OAuth 2.0**: Implements robust Authorization Code Flow via the backend.
- 📊 **Real-time Progress**: Track transfer status with live progress updates.
- 📁 **File Management**: Browse and select files from your connected cloud storage.

## Prerequisites

- Node.js (v18 or higher)
- npm or yarn

## Setup

### 1. Clone the repository
```bash
git clone <repository-url>
cd <repository-directory>
```

### 2. Install Dependencies
You need to install dependencies for both the frontend and the backend.

**Frontend:**
```bash
npm install
```

**Backend:**
```bash
cd server
npm install
cd ..
```

### 3. Configure Environment Variables

**Frontend (`.env`):**
Create a `.env` file in the root directory:
```env
VITE_MS_CLIENT_ID=your_microsoft_client_id
VITE_GOOGLE_CLIENT_ID=your_google_client_id
```

**Backend (`server/.env`):**
Create a `.env` file in the `server` directory:
```env
PORT=3001
# Microsoft Graph Credentials
VITE_MS_CLIENT_ID=your_microsoft_client_id
MS_CLIENT_SECRET=your_microsoft_client_secret

# Google Drive Credentials
VITE_GOOGLE_CLIENT_ID=your_google_client_id
GOOGLE_CLIENT_SECRET=your_google_client_secret
REDIRECT_URI=http://localhost:5173/auth/callback
```

> **Note:** You must register applications in both Azure Portal and Google Cloud Console. 
> Ensure the Redirect URI is set to `http://localhost:5173/auth/callback`.

### 4. Run the Application

You need to run both the backend server and the frontend client.

**Start Backend (Terminal 1):**
```bash
cd server
npm run dev
```
*Server runs on http://localhost:3001*

**Start Frontend (Terminal 2):**
```bash
npm run dev
```
*Frontend runs on http://localhost:5173*

## Project Structure

- **`/server`**: Node.js Express Backend
  - `src/routes`: API endpoints (`/auth`, `/transfer`)
  - `src/services`: Cloud provider integration (`onedrive.ts`, `googledrive.ts`)
- **`/src`**: React Frontend
  - `components`: UI components (Cards, Progress, Alerts)
  - `lib/api.ts`: API client for communicating with the backend
  - `App.tsx`: Main application logic and state management

## Technologies

- **Frontend**: React, TypeScript, Vite, Tailwind CSS, Lucide Icons, Shadcn UI
- **Backend**: Node.js, Express, TypeScript, Axios, Microsoft Graph Client, Google APIs

## License

ISC