electron/lib/renderer/init.js
Charles Kerr 5eb00e45aa
Merge pull request #11158 from electron/execute-errors
fix: Pass on errors thrown in `executeJavaScript`
2017-11-20 09:14:05 -06:00

182 lines
6.3 KiB
JavaScript

'use strict'
const events = require('events')
const path = require('path')
const Module = require('module')
const resolvePromise = Promise.resolve.bind(Promise)
// We modified the original process.argv to let node.js load the
// init.js, we need to restore it here.
process.argv.splice(1, 1)
// Clear search paths.
require('../common/reset-search-paths')
// Import common settings.
require('../common/init')
var globalPaths = Module.globalPaths
// Expose public APIs.
globalPaths.push(path.join(__dirname, 'api', 'exports'))
// The global variable will be used by ipc for event dispatching
var v8Util = process.atomBinding('v8_util')
v8Util.setHiddenValue(global, 'ipc', new events.EventEmitter())
// Use electron module after everything is ready.
const electron = require('electron')
// Call webFrame method.
electron.ipcRenderer.on('ELECTRON_INTERNAL_RENDERER_WEB_FRAME_METHOD', (event, method, args) => {
electron.webFrame[method](...args)
})
electron.ipcRenderer.on('ELECTRON_INTERNAL_RENDERER_SYNC_WEB_FRAME_METHOD', (event, requestId, method, args) => {
const result = electron.webFrame[method](...args)
event.sender.send(`ELECTRON_INTERNAL_BROWSER_SYNC_WEB_FRAME_RESPONSE_${requestId}`, result)
})
electron.ipcRenderer.on('ELECTRON_INTERNAL_RENDERER_ASYNC_WEB_FRAME_METHOD', (event, requestId, method, args) => {
const responseCallback = function (result) {
resolvePromise(result)
.then((resolvedResult) => {
event.sender.send(`ELECTRON_INTERNAL_BROWSER_ASYNC_WEB_FRAME_RESPONSE_${requestId}`, null, resolvedResult)
})
.catch((resolvedError) => {
if (resolvedError instanceof Error) {
// Errors get lost, because: JSON.stringify(new Error('Message')) === {}
// Take the serializable properties and construct a generic object
resolvedError = {
message: resolvedError.message,
stack: resolvedError.stack,
name: resolvedError.name,
__ELECTRON_SERIALIZED_ERROR__: true
}
}
event.sender.send(`ELECTRON_INTERNAL_BROWSER_ASYNC_WEB_FRAME_RESPONSE_${requestId}`, resolvedError)
})
}
args.push(responseCallback)
electron.webFrame[method](...args)
})
// Process command line arguments.
let nodeIntegration = 'false'
let webviewTag = 'false'
let preloadScript = null
let isBackgroundPage = false
let appPath = null
for (let arg of process.argv) {
if (arg.indexOf('--guest-instance-id=') === 0) {
// This is a guest web view.
process.guestInstanceId = parseInt(arg.substr(arg.indexOf('=') + 1))
} else if (arg.indexOf('--opener-id=') === 0) {
// This is a guest BrowserWindow.
process.openerId = parseInt(arg.substr(arg.indexOf('=') + 1))
} else if (arg.indexOf('--node-integration=') === 0) {
nodeIntegration = arg.substr(arg.indexOf('=') + 1)
} else if (arg.indexOf('--preload=') === 0) {
preloadScript = arg.substr(arg.indexOf('=') + 1)
} else if (arg === '--background-page') {
isBackgroundPage = true
} else if (arg.indexOf('--app-path=') === 0) {
appPath = arg.substr(arg.indexOf('=') + 1)
} else if (arg.indexOf('--webview-tag=') === 0) {
webviewTag = arg.substr(arg.indexOf('=') + 1)
}
}
if (window.location.protocol === 'chrome-devtools:') {
// Override some inspector APIs.
require('./inspector')
nodeIntegration = 'false'
} else if (window.location.protocol === 'chrome-extension:') {
// Add implementations of chrome API.
require('./chrome-api').injectTo(window.location.hostname, isBackgroundPage, window)
nodeIntegration = 'false'
} else if (window.location.protocol === 'chrome:') {
// Disable node integration for chrome UI scheme.
nodeIntegration = 'false'
} else {
// Override default web functions.
require('./override')
// Inject content scripts.
require('./content-scripts-injector')
// Load webview tag implementation.
if (webviewTag === 'true' && process.guestInstanceId == null) {
require('./web-view/web-view')
require('./web-view/web-view-attributes')
}
}
if (nodeIntegration === 'true') {
// Export node bindings to global.
global.require = require
global.module = module
// Set the __filename to the path of html file if it is file: protocol.
if (window.location.protocol === 'file:') {
var pathname = process.platform === 'win32' && window.location.pathname[0] === '/' ? window.location.pathname.substr(1) : window.location.pathname
global.__filename = path.normalize(decodeURIComponent(pathname))
global.__dirname = path.dirname(global.__filename)
// Set module's filename so relative require can work as expected.
module.filename = global.__filename
// Also search for module under the html file.
module.paths = module.paths.concat(Module._nodeModulePaths(global.__dirname))
} else {
global.__filename = __filename
global.__dirname = __dirname
if (appPath) {
// Search for module under the app directory
module.paths = module.paths.concat(Module._nodeModulePaths(appPath))
}
}
if (window.location.protocol === 'https:' ||
window.location.protocol === 'http:' ||
window.location.protocol === 'ftp:') {
let warning = 'This renderer process has Node.js integration enabled '
warning += 'and attempted to load remote content. This exposes users of this app to severe '
warning += 'security risks.\n'
warning += 'For more information and help, consult https://electronjs.org/docs/tutorial/security'
console.warn('%cElectron Security Warning', 'font-weight: bold;', warning)
}
// Redirect window.onerror to uncaughtException.
window.onerror = function (message, filename, lineno, colno, error) {
if (global.process.listeners('uncaughtException').length > 0) {
global.process.emit('uncaughtException', error)
return true
} else {
return false
}
}
} else {
// Delete Node's symbols after the Environment has been loaded.
process.once('loaded', function () {
delete global.process
delete global.Buffer
delete global.setImmediate
delete global.clearImmediate
delete global.global
})
}
// Load the script specfied by the "preload" attribute.
if (preloadScript) {
try {
require(preloadScript)
} catch (error) {
console.error('Unable to load preload script: ' + preloadScript)
console.error(error.stack || error.message)
}
}