Comunica Fetch HTTP Actor

An HTTP actor that uses fetch to perform HTTP requests.

When this actor is used in Node.js, a memory-based cache will be initialized. This cache is only used when the httpCache context flag is enabled.

This module is part of the Comunica framework, and should only be used by developers that want to build their own query engine.

When this actor is used, a custom fetch implementation may be provided via the context (fetch). If none is provided, the global fetch implementation from the runtime or a polyfill is used.

Click here if you just want to query with Comunica.

Install

$ yarn add @comunica/actor-http-fetch

Configure

After installing, this package can be added to your engine's configuration as follows:

{
  "@context": [
    "https://linkedsoftwaredependencies.org/bundles/npm/@comunica/actor-http-fetch/^5.0.0/components/context.jsonld"
  ],
  "actors": [
    {
      "@id": "urn:comunica:default:http/actors#fetch",
      "@type": "ActorHttpFetch"
    }
  ]
}

Config Parameters

• cacheMaxSize: Maximum size of the cache (in bytes). Defaults to 104857600 (100MB).
• cacheMaxCount: Maximum number of documents to store in the cache. Defaults to 1000.
• cacheMaxEntrySize: Maximum size of an entry in the cache (in bytes). Defaults to 5242880 (5MB).
• httpInvalidator: A mediator over the HTTP invalidate bus.
• agentOptions: The agent JSON options for the HTTP agent in Node.js environments. (optional)