# @comunica/actor-dereference-http

> A http dereference actor

Latest version **5.4.0** (published 2026-09-14) · MIT license · 0 weekly downloads

## Install

```sh
npm install @comunica/actor-dereference-http
pnpm add @comunica/actor-dereference-http
yarn add @comunica/actor-dereference-http
bun add @comunica/actor-dereference-http
```

## Health

**Score 60/100 (C)** — status: active.

Positive: has types; no vulnerabilities; recently updated; high maintenance score.

Warnings: low downloads; no esm support.

## Facts

| | |
|---|---|
| Version | 5.4.0 |
| Published | 2026-09-14 |
| First published | 2022-02-08 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | CommonJS |
| Dependencies | 6 |
| Unpacked size | 60.1 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 620 |
| Maintainers | joachimvh, rubensworks, rubenverborgh, dexagod, jeswr |
| Keywords | comunica, actor, dereference, http |

## Links

- npm: https://www.npmjs.com/package/@comunica/actor-dereference-http
- Repository: https://github.com/comunica/comunica
- Homepage: https://comunica.dev/
- Issues: https://github.com/comunica/comunica/issues
- Funding: https://opencollective.com/comunica-association
- npm.io page: https://npm.io/package/@comunica/actor-dereference-http

## Dependencies (6)

- [@comunica/core](https://npm.io/package/@comunica/core.md) ^5.4.0
- [@comunica/types](https://npm.io/package/@comunica/types.md) ^5.4.0
- [@comunica/bus-http](https://npm.io/package/@comunica/bus-http.md) ^5.4.0
- [@jeswr/stream-to-string](https://npm.io/package/@jeswr/stream-to-string.md) ^2.0.0
- [relative-to-absolute-iri](https://npm.io/package/relative-to-absolute-iri.md) ^1.0.7
- [@comunica/bus-dereference](https://npm.io/package/@comunica/bus-dereference.md) ^5.4.0

## Recent versions

- 5.4.0 (latest) — 2026-09-14
- 4.4.2-alpha.49.0 (next) — 2025-10-22
- 5.3.0 — 2026-07-10
- 5.2.4 — 2026-06-19
- 5.2.3 — 2026-05-26
- 5.2.2 — 2026-05-03
- 5.2.0 — 2026-04-14
- 5.1.3 — 2026-01-30
- 5.1.0 — 2026-01-16
- 5.0.3 — 2026-01-12
- 5.0.2 — 2026-01-12
- 5.0.0 — 2026-01-08
- 4.5.0 — 2025-11-18
- 4.4.1 — 2025-09-25
- 4.4.0 — 2025-09-17
- … 73 more at https://npm.io/package/@comunica/actor-dereference-http/versions

## README

# Comunica Http Dereference Actor

[![npm version](https://badge.fury.io/js/%40comunica%2Factor-dereference-http.svg)](https://www.npmjs.com/package/@comunica/actor-dereference-http)

An [Dereference](https://github.com/comunica/comunica/tree/master/packages/bus-dereference) actor that
resolves the URL using the [HTTP bus](https://github.com/comunica/comunica/tree/master/packages/bus-http).

An Dereference actor implementation for Comunica that resolves the URL using the HTTP bus.

This module is part of the [Comunica framework](https://github.com/comunica/comunica),
and should only be used by [developers that want to build their own query engine](https://comunica.dev/docs/modify/).

[Click here if you just want to query with Comunica](https://comunica.dev/docs/query/).

## Install

```bash
$ yarn add @comunica/actor-dereference-http
```

## Configure

After installing, this package can be added to your engine's configuration as follows:
```text
{
  "@context": [
    ...
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-dereference-http/^5.0.0/components/context.jsonld"
  ],
  "actors": [
    ...
    {
      "@id": "urn:comunica:default:dereference/actors#http",
      "@type": "ActorDereferenceHttp",
      "beforeActors": { "@id": "urn:comunica:default:dereference/actors#fallback" },
      "mediatorHttp": { "@id": "urn:comunica:default:http/mediators#main" },
      "maxAcceptHeaderLength": 1024,
      "maxAcceptHeaderLengthBrowser": 128,
    }
  ]
}
```

### Config Parameters

* `mediatorHttp`: A mediator over the [HTTP bus](https://github.com/comunica/comunica/tree/master/packages/bus-http).
* `maxAcceptHeaderLength`: The maximum allowed accept header value length for non-browser environments, defaults to `1024`.
* `maxAcceptHeaderLengthBrowser`: The maximum allowed accept header value length for browser environments, defaults to `128`.

---
_Source: https://npm.io/package/@comunica/actor-dereference-http · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._