Remote sources (Google Drive, Dropbox, OneDrive, -

Pull files straight from cloud storage - no local copy needed

New in 5.1: four built-in cloud-source pickers. AjaxUploader 5.1 ships first-class pickers for Google Drive, OneDrive, Dropbox, and Box - OAuth implicit flow, no server broker required for the auth round-trip. Each picked file's download URL flows into the server-side importFromUrl() pipeline, streamed through your provider with the same NDJSON live-progress contract as URL import. Extend further via AjaxUploader.registerRemoteSource(name, source) for any custom file portal (SharePoint, Egnyte, internal DMS).

Setup required. The Google Drive button below renders disabled until you configure an API key + OAuth client ID:

Create a project at console.cloud.google.com, enable the Picker API.
Create an API key (Credentials -> API key).
Create an OAuth 2.0 Client ID (Credentials -> Create -> OAuth client ID -> Web application). Add your origin to "Authorized JavaScript origins".

Configure the adapter before create():

AjaxUploader.configureRemoteSource('googledrive', {
 apiKey: 'YOUR_API_KEY',
 clientId: 'YOUR_OAUTH_CLIENT_ID'
});

Registering a custom source

AjaxUploader.registerRemoteSource('dropbox', {
 title: 'Dropbox',
 icon: '<svg viewBox=...>...</svg>', // SVG markup or img URL ready: function () { return !!window.Dropbox; },

 pick: function (uploader) {
 return new Promise(function (resolve, reject) {
 window.Dropbox.choose({
 multiselect: true,
 linkType: 'direct',
 success: function (files) {
 resolve(files.map(function (f) {
 return { url: f.link, fileName: f.name, fileSize: f.bytes };
 }));
 },
 cancel: function () { reject(new Error('cancelled')); }
 });
 });
 }
});

AjaxUploader.create('#uploader', {
 remoteSources: ['googledrive', 'dropbox']
});

`RemoteFile` shape returned from `pick()`

{
 url: 'https://www.googleapis.com/drive/v3/files/abc?alt=media',
 fileName: 'quarterly-report.pdf',
 fileSize: 2_457_600, // optional contentType: 'application/pdf', // optional headers: { 'Authorization': 'Bearer ya29...' } // optional
}

Wire flow

User clicks the source button rendered in the uploader chrome.
Adapter's pick() runs - typically opens an OAuth popup + provider's native file picker.
On select -> resolves with a RemoteFile (or array).
Each item is handed to uploader.importFromUrl(url, { fileName, contentType, headers }).
The server /import-url endpoint fetches the URL (using any provided Authorization header) and streams through your IUploaderProvider with live NDJSON progress.

Built-in: Google Drive (no server broker needed)

Uses Google Picker + Identity Services. The browser opens the OAuth popup, gets an access token, passes it to Picker, then forwards the token as Authorization when the server fetches the file from Drive's REST API. The token never goes to your server - just the URL + the bearer.

Roadmap

Built-in Dropbox + OneDrive adapters (same pattern as Drive) - coming in 5.1.
Server-side broker for OAuth flows where the browser shouldn't see the token - opt-in via remoteSourcesBroker: '/api/upload/remote-sources'.
Per-source MIME / size filters at picker-time - partial support today via options.