@reupload/client

Browser client for uploading files through your backend file router — never expose a Reupload API key in the front end.

Works in React, Next.js (App + Pages), SolidStart, Vite, and any environment with fetch and FormData.

Pair with @reupload/sdk on your server, or any API that implements the default routes below.

Install

npm install @reupload/client

Optional React hook:

npm install @reupload/client

Environment

# Next.js
NEXT_PUBLIC_API_URL=http://localhost:3001

# Vite
VITE_API_URL=http://localhost:3001

Quick start (CDN flow)

Your backend exposes POST /uploads/prepare, the browser PUTs to the signed CDN URL, then POST /uploads/complete. See the React/Next + Node guide.

import { createReuploadClientFromEnv } from "@reupload/client";

const client = createReuploadClientFromEnv();

async function onFileSelected(file: File) {
  const { uploadId, fileId } = await client.uploadFile(file);

  const final = await client.pollUploadStatus(uploadId);
  if (final.status === "COMPLETED") {
    console.log("Ready:", fileId);
  }
}

Backend file router

Default paths (override with routes in the constructor):

Method	Path	Purpose
POST	/uploads/prepare	Create session → return uploadUrl, uploadId, fileId
POST	/uploads/complete	Finalize CDN upload ({ uploadId })
GET	/uploads/:uploadId/status	Poll { status, fileId }
GET	/files/:fileId/access	Signed download URL

Custom paths:

const client = new ReuploadClient({
  apiUrl: "https://api.myapp.com",
  routes: {
    prepare: "/api/v1/files/prepare",
    status: (id) => `/api/v1/files/uploads/${id}`,
  },
});

Use @reupload/sdk on your server to implement these routes.

API

ReuploadClient

Method	Description
uploadFile(file, options?)	Full CDN flow via your backend
prepareUpload(meta)	Step 1 only (CDN)
completeUpload({ uploadId })	Step 3 only (CDN)
getUploadStatus(uploadId)	Single status poll
pollUploadStatus(uploadId, options?)	Poll until terminal status
getFileAccess(fileId, query?)	Signed URL from your backend
openFileInNewTab(fileId)	window.open(access.url)

Low-level

• putFileToUploadUrl(uploadUrl, file, { onProgress }) — CDN PUT with optional XMLHttpRequest progress
• validateFile(file, { maxBytes, accept }) — client-side checks before upload
• pollUploadStatus(fetcher, options) — standalone poller

Errors

import { isReuploadClientError } from "@reupload/client";

try {
  await client.uploadFile(file);
} catch (error) {
  if (isReuploadClientError(error)) {
    console.log(error.phase); // "backend" | "cdn"
    console.log(error.status, error.message);
  }
}

React hook

"use client";

import { useReuploadUpload } from "@reupload/client/react";

export function FileUpload() {
  const { upload, state, reset, isUploading } = useReuploadUpload({
    validation: { maxBytes: 52_428_800, accept: ["image/*", "application/pdf"] },
  });

  return (
    <div>
      <input
        type="file"
        disabled={isUploading}
        onChange={(e) => {
          const file = e.target.files?.[0];
          if (file) void upload(file);
        }}
      />
      {state.status === "completed" ? (
        <p>Done — {state.fileId}</p>
      ) : null}
      {state.status === "error" ? <p>{state.message}</p> : null}
      <button type="button" onClick={reset}>
        Reset
      </button>
    </div>
  );
}

Options:

• poll: true — poll status after upload (default false)
• client — reuse a configured ReuploadClient

For server-side direct uploads (browser → your API → Reupload), use @reupload/sdk on the server — not this package.

Confirm before upload

ReuploadClient.uploadFile() and useReuploadUpload().upload() always start the upload when you call them — there is no built-in file-picker or auto-upload behavior.

For confirm-before-upload UX, use @reupload/react with immediateUpload={false}. The shared BeforeUploadHandler type is exported for optional async gates on confirm:

import type { BeforeUploadHandler } from "@reupload/client";

const onBeforeUpload: BeforeUploadHandler = async (files) => {
  return window.confirm(`Upload ${files.length} file(s)?`);
};

SolidStart / H3

Use the client in API route handlers or components — same as React. For file input in the browser:

import { createReuploadClientFromEnv } from "@reupload/client";

const client = createReuploadClientFromEnv();
await client.uploadFile(file);

SolidStart server routes that receive uploads should use @reupload/sdk/h3 instead.

Development

cd node-packages/reupload-client
npm install
npm run typecheck
npm test
npm run build

License

MIT