89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
// Forked from https://github.com/ipfs/ipfs-service-worker which does not work with recent versions
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// of js-ipfs.
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/* global self, Response */
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'use strict'
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const IPFS = require('ipfs')
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let node
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// https://redfin.engineering/how-to-fix-the-refresh-button-when-using-service-workers-a8e27af6df68
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self.skipWaiting()
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self.addEventListener('install', (event) => {
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console.log('install step')
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event.waitUntil(self.skipWaiting())
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})
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self.addEventListener('activate', (event) => {
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console.log('activate step')
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event.waitUntil(self.clients.claim())
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})
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function initialize_ipfs() {
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return new Promise((resolve, reject) => {
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node = new IPFS()
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node.on('ready', () => {
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console.log('js-ipfs node is ready')
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resolve()
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})
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node.on('error', (err) => {
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console.log('js-ipfs node errored', err)
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reject(err)
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})
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})
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}
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let ipfs_initialized
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function response(status_code, status_text, body, headers={}) {
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// Return a promise for a response with the given HTTP status code, status text, and HTML body.
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return new Promise((resolve, reject) => {
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resolve(
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new Response(
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body,
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{
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status: status_code,
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statusText: status_text,
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headers: headers
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}
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)
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)
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})
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}
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self.addEventListener('fetch', (event) => {
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if (!event.request.url.startsWith(self.location.origin + '/ipfs')) {
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return console.log('Fetch not in scope:', event.request.url)
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}
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console.log('Handling fetch event:', event.request.url)
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if (!ipfs_initialized) {
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ipfs_initialized = initialize_ipfs()
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}
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event.respondWith(
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ipfs_initialized.then(() => {
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const url = new URL(event.request.url)
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const multihash = url.pathname
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return node.files.cat(multihash)
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}).then((contents_buffer) => {
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return response(200, 'OK', contents_buffer)
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}).catch((error) => {
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console.log(error)
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return response(
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404, 'Not Found',
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Buffer.from('<html><head><title>404 Not Found</title></head><body bgcolor="white"><center><h1>404 Not Found</h1></center><hr><center>Intergalactic</center></body></html>'),
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{'Content-Type': 'text/html; charset=utf-8'}
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)
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})
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)
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})
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