getDevToolsMiddleware.js
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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @format
*/
'use strict';
const launchChrome = require('../util/launchChrome');
const {exec} = require('child_process');
function launchChromeDevTools(host, args = '') {
var debuggerURL = 'http://' + host + '/debugger-ui' + args;
console.log('Launching Dev Tools...');
launchChrome(debuggerURL);
}
function escapePath(pathname) {
// " Can escape paths with spaces in OS X, Windows, and *nix
return '"' + pathname + '"';
}
function launchDevTools({host, projectRoots}, isChromeConnected) {
// Explicit config always wins
var customDebugger = process.env.REACT_DEBUGGER;
if (customDebugger) {
var projects = projectRoots.map(escapePath).join(' ');
var command = customDebugger + ' ' + projects;
console.log('Starting custom debugger by executing: ' + command);
exec(command, function(error, stdout, stderr) {
if (error !== null) {
console.log('Error while starting custom debugger: ' + error);
}
});
} else if (!isChromeConnected()) {
// Dev tools are not yet open; we need to open a session
launchChromeDevTools(host);
}
}
module.exports = function(options, isChromeConnected) {
return function(req, res, next) {
var host = req.headers.host;
if (req.url === '/launch-safari-devtools') {
// TODO: remove `console.log` and dev tools binary
console.log(
'We removed support for Safari dev-tools. ' +
'If you still need this, please let us know.',
);
} else if (req.url === '/launch-chrome-devtools') {
// TODO: Remove this case in the future
console.log(
'The method /launch-chrome-devtools is deprecated. You are ' +
' probably using an application created with an older CLI with the ' +
' packager of a newer CLI. Please upgrade your application: ' +
'https://facebook.github.io/react-native/docs/upgrading.html',
);
launchDevTools(options, isChromeConnected);
res.end('OK');
} else if (req.url === '/launch-js-devtools') {
launchDevTools({...options, host}, isChromeConnected);
res.end('OK');
} else {
next();
}
};
};