Cloud Storage Picker

A lightweight, TypeScript-first library for integrating file pickers from popular cloud storage providers like Dropbox and Google Drive into your web applications.

Features

• 🎯 Type-safe - Built with TypeScript for full type safety and IntelliSense support
• 🔌 Pluggable - Easy-to-use provider architecture for different cloud storage services
• 🪶 Lightweight - Minimal bundle size with on-demand script loading
• 🎨 Framework agnostic - Works with React, Vue, Svelte, or vanilla JavaScript
• 📦 Tree-shakeable - Import only the providers you need

Supported Providers

• ✅ Dropbox
• ✅ Google Drive
• 🔜 OneDrive (coming soon)

Installation

npm install cloud-storage-picker

pnpm add cloud-storage-picker

yarn add cloud-storage-picker

Quick Start

Dropbox

import { createPicker } from "cloud-storage-picker";
import { dropboxProvider } from "cloud-storage-picker/dropbox";

const picker = createPicker({
  provider: dropboxProvider({
    appKey: "your-dropbox-app-key",
  }),
});

// Open the picker
const files = await picker.open({
  multiSelect: true,
  linkType: "preview",
});

console.log(files);
// [{ id: '...', name: 'document.pdf', link: 'https://...', rawData: {...} }]

Google Drive

import { createPicker } from "cloud-storage-picker";
import { googleDriveProvider } from "cloud-storage-picker/google-drive";

const picker = createPicker({
  provider: googleDriveProvider({
    clientId: "your-google-client-id",
    apiKey: "your-google-api-key",
  }),
});

// Open the picker
const files = await picker.open({
  maxItems: 5,
});

console.log(files);
// [{ id: '...', name: 'presentation.pptx', link: 'https://...', rawData: {...} }]

API Reference

createPicker(params)

Creates a file picker instance for a given storage provider.

Parameters:

• params.provider - A storage provider instance (e.g., dropboxProvider() or googleDriveProvider())

Returns:

• An object with an open(options?) method that returns a Promise<FileData[]>

FileData<T>

The normalized file data structure returned by all providers:

interface FileData<RawFileData> {
  id: string; // Unique identifier for the file
  name: string; // Name of the file
  link: string; // URL to access the file
  rawData: RawFileData; // Provider-specific raw file data
}

Provider-Specific Documentation

Dropbox Provider

Configuration

dropboxProvider(config: DropboxConfig, options?: DropboxOptions)

DropboxConfig:

• appKey (required): Your Dropbox App Key. Get one from the Dropbox App Console.

DropboxOptions:

• linkType: "preview" | "direct" - Type of link to return (default: "preview")
• multiSelect: boolean - Enable multiple file selection (default: false)
• extensions: string[] - Filter by file extensions or types (e.g., [".pdf", "images"])
• folderSelect: boolean - Allow folder selection (default: false)
• sizeLimit: number - Maximum file size in bytes

DropboxFileData:

interface DropboxFileData {
  id: string;
  name: string;
  bytes: number;
  isDir: boolean;
  link: string;
  linkType: "preview" | "direct";
  icon: string;
  thumbnailLink?: string;
}

Example

const picker = createPicker({
  provider: dropboxProvider(
    { appKey: "your-app-key" },
    {
      multiSelect: true,
      extensions: [".pdf", ".docx", "images"],
      sizeLimit: 10 * 1024 * 1024, // 10MB
    },
  ),
});

const files = await picker.open();

Google Drive Provider

Configuration

googleDriveProvider(config: GoogleDriveConfig, options?: GoogleDriveOptions)

GoogleDriveConfig:

• clientId (required): Your Google OAuth 2.0 Client ID
• apiKey (required): Your Google API Key

Get credentials from the Google Cloud Console.

GoogleDriveOptions:

• maxItems: number - Maximum number of items a user can select

GoogleDriveFileData:

interface GoogleDriveFileData {
  id: string;
  name: string;
  mimeType: string;
  url: string;
}

Example

const picker = createPicker({
  provider: googleDriveProvider(
    {
      clientId: "your-client-id.apps.googleusercontent.com",
      apiKey: "your-api-key",
    },
    { maxItems: 3 },
  ),
});

const files = await picker.open();

Advanced Usage

Default Options

You can set default options when creating a provider and override them per call:

const picker = createPicker({
  provider: dropboxProvider(
    { appKey: "your-app-key" },
    { multiSelect: false }, // Default
  ),
});

// Override defaults for specific calls
const singleFile = await picker.open(); // Uses multiSelect: false
const multipleFiles = await picker.open({ multiSelect: true }); // Override

Error Handling

try {
  const files = await picker.open();
  console.log("Selected files:", files);
} catch (error) {
  if (error.message.includes("cancelled")) {
    console.log("User cancelled the picker");
  } else {
    console.error("Picker error:", error);
  }
}

Accessing Raw Provider Data

Each FileData object includes a rawData property with the complete, unmodified response from the provider:

const files = await picker.open();

files.forEach((file) => {
  console.log("Normalized:", file.id, file.name);
  console.log("Raw Dropbox data:", file.rawData);
  // Access provider-specific fields like bytes, icon, thumbnailLink, etc.
});

Setup Requirements

Dropbox

1. Create an app at the Dropbox App Console
2. Enable "Chooser" permissions
3. Add your domain to the allowed domains list
4. Copy your App Key

Google Drive

1. Go to the Google Cloud Console
2. Create a new project or select an existing one
3. Enable the Google Picker API and Google Drive API
4. Create OAuth 2.0 credentials:
   • Add authorized JavaScript origins (e.g., http://localhost:3000)
5. Create an API Key
6. Copy your Client ID and API Key

License

MIT © Melvin Otieno

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Links

• GitHub Repository
• Issue Tracker
• NPM Package

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Made with ❤️ by Melvin Otieno