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- implements #44 - simple map with automatic key expiration - tests
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| 'use strict' | ||
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| const { prefs } = require('sdk/simple-prefs') | ||
| const { setInterval, clearInterval } = require('sdk/timers') | ||
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| const cache = Object.create(null) | ||
| const ttl = 30 * 60 * 1000 | ||
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| let size = 0 | ||
| let hits = 0 | ||
| let misses = 0 | ||
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| exports.put = function (key, value, expire) { | ||
| if (!cache[key]) { size++ } | ||
| cache[key] = { value: value, expire: (expire || Date.now() + ttl) } | ||
| // console.log('cache.put: ' + key) | ||
| return value | ||
| } | ||
| exports.get = function (key) { | ||
| const data = cache[key] | ||
| if (typeof data !== 'undefined') { | ||
| hits++ | ||
| // console.log('cache.hit: ' + key) | ||
| return data.value | ||
| } else { | ||
| misses++ | ||
| // console.log('cache.miss: ' + key) | ||
| return undefined | ||
| } | ||
| } | ||
| exports.dropExpired = function () { | ||
| // console.log('cache.size=' + size) | ||
| // console.log('cache.hits=' + hits) | ||
| // console.log('cache.misses=' + misses) | ||
| // console.log('cache.dropExpired..') | ||
| for (let key in cache) { | ||
| const data = cache[key] | ||
| if (data.expire && data.expire < Date.now()) { | ||
| // console.log('cache.drop: ' + key) | ||
| delete cache[key] | ||
| cache.size-- | ||
| } | ||
| } | ||
| } | ||
| exports.ttl = ttl | ||
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| // execute on startup and then on every preference change | ||
| let cleanup = null | ||
| require('sdk/simple-prefs').on('dns', (function f () { | ||
| clearInterval(cleanup) | ||
| if (prefs.dns) { | ||
| cleanup = setInterval(exports.dropExpired, exports.ttl) | ||
| // blacklist hosts which may confuse gateway | ||
| exports.put('127.0.0.1', false, null) | ||
| exports.put(prefs.customGatewayHost, false, null) | ||
| } | ||
| return f | ||
| })()) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| 'use strict' | ||
|
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| require('../lib/redirects.js') | ||
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| const gw = require('../lib/gateways.js') | ||
| const api = require('../lib/api.js') | ||
| const tabs = require('sdk/tabs') | ||
| const { prefs } = require('sdk/simple-prefs') | ||
| const dnsCache = require('../lib/dns-cache.js') | ||
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| exports['test a redirect triggered by dnslink'] = function (assert, done) { | ||
| const fqdnWithDnslink = 'ipfs.git.sexy' | ||
| const sitePath = '/some/path/to-resource#with-hash' | ||
| const openURL = 'http://' + fqdnWithDnslink + sitePath | ||
| const expectedURL = gw.customUri.spec + 'ipns/' + fqdnWithDnslink + sitePath | ||
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| dnsCache.put(fqdnWithDnslink, true) // mock: /api/v0/dns/ returned IPFS Path | ||
| assert.equal(api.isDnslinkPresent(fqdnWithDnslink), true, 'fqdnWithDnslink should return true') | ||
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| const dnsPref = prefs.dns | ||
| prefs.dns = true | ||
| gw.redirectEnabled = true | ||
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| tabs.open({ | ||
| url: openURL, | ||
| onReady: function onReady (tab) { | ||
| assert.equal(tab.url, expectedURL, 'expected redirect') | ||
| prefs.dns = dnsPref | ||
| tab.close(done) | ||
| } | ||
| }) | ||
| } | ||
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| exports['test DNS Cache expiration'] = function (assert) { | ||
| const expired = Date.now() - 1000 | ||
| const key = 'foo.test' | ||
| const value = true | ||
| dnsCache.put(key, value, expired) | ||
| assert.equal(dnsCache.get(key), value, 'dnsCache should be a map') | ||
| dnsCache.dropExpired() | ||
| assert.ok(typeof dnsCache.get(key) === 'undefined', 'dnsCache.dropExpired should drop regular key') | ||
| assert.equal(dnsCache.get('127.0.0.1'), false, 'special key should not be dropped') | ||
| assert.equal(dnsCache.get(prefs.customGatewayHost), false, 'special key should not be dropped') | ||
| } | ||
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| require('sdk/test').run(exports) |