express-range-tracker

express-range-tracker

Detects semantically correct usage of the range header by firing the onDownloaded event when all chunks related to the current ip are downloaded

Usage

const express = require("express");
const rangeTracker = require("express-range-tracker");

express()
  .use(
    rangeTracker({
      timestampFunction: Date.now,
      onDownloaded: (req, res, next) => {
        /* ... */
      },
    })
  )
  .listen(3000);

timestampFunction - Calculates datetime of range chunk request

storage - an Object that supports indexing, associative array. {} by default

onDownloaded - event that behaves as middleware

onDeadlineReached - event that fires when maxDelay exceeds timestamp window between the last and the new timestamps

allowedTraits - array of functions that determine whitelist of range header behavior. true if match, false otherwise

interface Trait {
  from: number;
  to: number;
  timestamp: number;
}

(previous: Trait, current: Trait) => boolean;

bannedTraits - array of functions that determine blacklist of range header behavior. true if match, false otherwise

(previous: Trait, current: Trait) => boolean;

Test

npm test