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metamask-extension/app/scripts/lib/ens-ipfs/setup.js
Mark Stacey 5ee1291662
Prevent accidental use of globals (#8340)
Previously all browser globals were allowed to be used anywhere by
ESLint because we had set the `env` property to `browser` in the ESLint
config. This has made it easy to accidentally use browser globals
(e.g. #8338), so it has been removed. Instead we now have a short list
of allowed globals.

All browser globals are now accessed as properties on `window`.

Unfortunately this change resulted in a few different confusing unit
test errors, as some of our unit tests setup assumed that a particular
global would be used via `window` or `global`. In particular,
`window.fetch` didn't work correctly because it wasn't patched by the
AbortController polyfill (only `global.fetch` was being patched).
The `jsdom-global` package we were using complicated matters by setting
all of the JSDOM `window` properties directly on `global`, overwriting
the `AbortController` for example.

The `helpers.js` test setup module has been simplified somewhat by
removing `jsdom-global` and constructing the JSDOM instance manually.
The JSDOM window is set on `window`, and a few properties are set on
`global` as well as needed by various dependencies. `node-fetch` and
the AbortController polyfill/patch now work as expected as well,
though `fetch` is only available on `window` now.
2020-04-15 14:23:27 -03:00

74 lines
2.6 KiB
JavaScript

import urlUtil from 'url'
import extension from 'extensionizer'
import resolveEnsToIpfsContentId from './resolver.js'
const supportedTopLevelDomains = ['eth']
export default setupEnsIpfsResolver
function setupEnsIpfsResolver ({ provider, getCurrentNetwork, getIpfsGateway }) {
// install listener
const urlPatterns = supportedTopLevelDomains.map((tld) => `*://*.${tld}/*`)
extension.webRequest.onErrorOccurred.addListener(webRequestDidFail, { urls: urlPatterns, types: ['main_frame'] })
// return api object
return {
// uninstall listener
remove () {
extension.webRequest.onErrorOccurred.removeListener(webRequestDidFail)
},
}
async function webRequestDidFail (details) {
const { tabId, url } = details
// ignore requests that are not associated with tabs
// only attempt ENS resolution on mainnet
if (tabId === -1 || getCurrentNetwork() !== '1') {
return
}
// parse ens name
const urlData = urlUtil.parse(url)
const { hostname: name, path, search, hash: fragment } = urlData
const domainParts = name.split('.')
const topLevelDomain = domainParts[domainParts.length - 1]
// if unsupported TLD, abort
if (!supportedTopLevelDomains.includes(topLevelDomain)) {
return
}
// otherwise attempt resolve
attemptResolve({ tabId, name, path, search, fragment })
}
async function attemptResolve ({ tabId, name, path, search, fragment }) {
const ipfsGateway = getIpfsGateway()
extension.tabs.update(tabId, { url: `loading.html` })
let url = `https://app.ens.domains/name/${name}`
try {
const { type, hash } = await resolveEnsToIpfsContentId({ provider, name })
if (type === 'ipfs-ns') {
const resolvedUrl = `https://${hash}.${ipfsGateway}${path}${search || ''}${fragment || ''}`
try {
// check if ipfs gateway has result
const response = await window.fetch(resolvedUrl, { method: 'HEAD' })
if (response.status === 200) {
url = resolvedUrl
}
} catch (err) {
console.warn(err)
}
} else if (type === 'swarm-ns') {
url = `https://swarm-gateways.net/bzz:/${hash}${path}${search || ''}${fragment || ''}`
} else if (type === 'onion' || type === 'onion3') {
url = `http://${hash}.onion${path}${search || ''}${fragment || ''}`
} else if (type === 'zeronet') {
url = `http://127.0.0.1:43110/${hash}${path}${search || ''}${fragment || ''}`
}
} catch (err) {
console.warn(err)
} finally {
extension.tabs.update(tabId, { url })
}
}
}