react-uploady sender implementation of the TUS protocol

Usage no npm install needed!

<script type="module">
  import rpldyTusSender from 'https://cdn.skypack.dev/@rpldy/tus-sender';


TUS Sender

An Uploady sender implementation of the TUS protocol.

Supports version 1.0.0 of the TUS protocol

Under the hood, the tus-sender uses the @rpldy/chunked-sender to upload the files as chunks


  $ yarn add @rpldy/tus-sender

  $ npm i @rpldy/tus-sender

TUS Protocol

On top of the Core Protocol, Uploady supports the following extensions:

It also supports the Upload-Metadata header and will turn the destination/upload options params prop into the metadata key/value.


Name (* = mandatory) Type Default Description
version string "1.0.0" The tus server version
featureDetection boolean false whether to query the server for supported extensions
featureDetectionUrl string null URL to query for TUS server feature detection, in case it's different from upload URL
onFeaturesDetected (string[]) => ?TusOptions void callback to handle the extensions the server broadcasts
resume boolean true whether to store information locally on files being uploaded to support resuming
deferLength boolean false defer sending file length to server (protocol)
overrideMethod boolean false whether to use X-HTTP-Method-Override header instead of PATCH
sendDataOnCreate boolean false send first chunk with create request (protocol)
storagePrefix string "rpldy-tus" the key prefix to use for persisting resumable info about files
lockedRetryDelay number 2000 milliseconds to wait before retrying a locked (423) resumable file
forgetOnSuccess boolean false whether to remove URL from localStorage when upload finishes successfully
ignoreModifiedDateInStorage boolean false ignore File's modified date when creating key for storage

All of the chunked-sender options are supported with this sender

When the chunked-sender parallel param is set to > 1, the Concatenation tus extension will be used. It will send the chunks as different parallel requests that are finalized once done.

Params prop that is set on the Destination or upload options is serialized (encoded according to Tus protocol) and sent as the value of the Upload-Metadata header.

Custom headers set on the Destination will be sent (and override existing headers) with the Creation request

Feature Detection

When the featureDetection option is enabled, the tus-sender will request the supported extensions' info from the server.

In case there are options that aren't supported by the extensions list the server provides, they will be turned off.

These options are:

  • parallel: requiring the concatenation extension
  • sendDataOnCreate: requiring the creation_with_upload extension
  • deferLength: requiring the creation_defer_length extension

When onFeaturesDetected callback is provided, the responsibility to turn off options that aren't supported is handed over to the callback. The object returned by the callback will be merged with options being used, overriding them as needed.

For feature detection to work, when the TUS server is served from a different origin than the page making the request, the server must allow these headers: Tus-Extension and Tus-Version to be read over CORS. Otherwise, it will not work and feature detection will be skipped.


import React, { useCallback, useEffect, useRef } from "react";
import createUploader from "@rpldy/uploader";
import getTusEnhancer from "@rpldy/tus-sender";

export const App = () => {
    const inputRef = useRef(null);
    const uploaderRef = useRef(null);

    useEffect(() => {
        const tusEnhancer = getTusEnhancer({
            parallel: 2,                

        uploaderRef.current = createUploader({
            enhancer: tusEnhancer,
            destination: {url: "my-tus-server.com"},
            params: {
                source: "rpldy",		
    }, []);

    const onClick = useCallback(() => {
        const input = inputRef.current;
        if (input) {
            input.value = "";
    }, []);

    const onInputChange = useCallback(() => {
    }, []);

    return <div>
        <input type="file" ref={inputRef} style={{ display: "none" }} onChange={onInputChange}/>
        <button id="upload-button" onClick={onClick}>Upload with TUS</button>