MediaClient

MediaClient is a simple JavaScript class for uploading and downloading media files to/from a Matrix homeserver.

Installation

npm install matrix-media

(Replace with your actual package name or usage)

Usage

const MediaClient = require('matrix-media');

const client = new MediaClient({ token: 'YOUR_ACCESS_TOKEN' });

// Upload a file buffer
const mxcUri = await client.upload(fileBuffer, 'filename.ext');
// mxcUri example: "mxc://matrix.org/abcdefg"

// Download a file from Matrix (returns Uint8Array)
const fileData = await client.downloadBuffer(mxcUri);

API

constructor({ fetch = globalThis.fetch, token })

• fetch — Optional: custom fetch implementation (default: global fetch)
• token — Required: Matrix access token for authorization

async upload(buffer, filename = "upload.bin") : Promise

• buffer — Buffer | Uint8Array | ArrayBuffer — File content to upload
• filename — string (optional) — Filename to use on upload (default: "upload.bin")

Returns a Promise that resolves to the Matrix content URI (mxc://...). The max upload size is ~50MB.

async downloadBuffer(mxcOrMediaUrl, timeout = 5000) : Promise

• mxcOrMediaUrl — string — Matrix content URI (mxc://...) or direct download URL
• timeout — number (optional) — Timeout in milliseconds (default: 5000)

Returns a Promise resolving to the file data as a Uint8Array.