mirror of https://github.com/status-im/metro.git
[react-packager] Modernize `Server` to ES6
This commit is contained in:
Martín Bigio
parent
fec5d8d4d4
commit
daf56c32eb
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@ -8,21 +8,20 @@
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*/
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'use strict';
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var url = require('url');
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var path = require('path');
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var declareOpts = require('../lib/declareOpts');
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var FileWatcher = require('../FileWatcher');
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var Bundler = require('../Bundler');
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var Activity = require('../Activity');
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var AssetServer = require('../AssetServer');
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var Promise = require('promise');
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var _ = require('underscore');
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var exec = require('child_process').exec;
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var fs = require('fs');
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const Activity = require('../Activity');
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const AssetServer = require('../AssetServer');
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const FileWatcher = require('../FileWatcher');
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const Bundler = require('../Bundler');
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const Promise = require('promise');
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module.exports = Server;
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const _ = require('underscore');
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const declareOpts = require('../lib/declareOpts');
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const exec = require('child_process').exec;
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const fs = require('fs');
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const path = require('path');
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const url = require('url');
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var validateOpts = declareOpts({
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const validateOpts = declareOpts({
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projectRoots: {
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type: 'array',
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required: true,
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@ -64,115 +63,7 @@ var validateOpts = declareOpts({
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},
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});
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function Server(options) {
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var opts = validateOpts(options);
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this._projectRoots = opts.projectRoots;
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this._bundles = Object.create(null);
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this._changeWatchers = [];
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var assetGlobs = opts.assetExts.map(function(ext) {
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return '**/*.' + ext;
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});
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var watchRootConfigs = opts.projectRoots.map(function(dir) {
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return {
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dir: dir,
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globs: [
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'**/*.js',
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'**/*.json',
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].concat(assetGlobs),
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};
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});
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if (opts.assetRoots != null) {
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watchRootConfigs = watchRootConfigs.concat(
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opts.assetRoots.map(function(dir) {
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return {
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dir: dir,
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globs: assetGlobs,
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};
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})
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);
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}
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this._fileWatcher = options.nonPersistent
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? FileWatcher.createDummyWatcher()
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: new FileWatcher(watchRootConfigs);
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this._assetServer = new AssetServer({
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projectRoots: opts.projectRoots,
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assetExts: opts.assetExts,
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});
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var bundlerOpts = Object.create(opts);
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bundlerOpts.fileWatcher = this._fileWatcher;
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bundlerOpts.assetServer = this._assetServer;
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this._bundler = new Bundler(bundlerOpts);
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var onFileChange = this._onFileChange.bind(this);
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this._fileWatcher.on('all', onFileChange);
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var self = this;
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this._debouncedFileChangeHandler = _.debounce(function(filePath) {
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self._rebuildBundles(filePath);
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self._informChangeWatchers();
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}, 50);
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}
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Server.prototype._onFileChange = function(type, filepath, root) {
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var absPath = path.join(root, filepath);
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this._bundler.invalidateFile(absPath);
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// Make sure the file watcher event runs through the system before
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// we rebuild the bundles.
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this._debouncedFileChangeHandler(absPath);
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};
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Server.prototype._rebuildBundles = function() {
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var buildBundle = this.buildBundle.bind(this);
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var bundles = this._bundles;
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Object.keys(bundles).forEach(function(optionsJson) {
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var options = JSON.parse(optionsJson);
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// Wait for a previous build (if exists) to finish.
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bundles[optionsJson] = (bundles[optionsJson] || Promise.resolve()).finally(function() {
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// With finally promise callback we can't change the state of the promise
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// so we need to reassign the promise.
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bundles[optionsJson] = buildBundle(options).then(function(p) {
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// Make a throwaway call to getSource to cache the source string.
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p.getSource({
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inlineSourceMap: options.inlineSourceMap,
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minify: options.minify,
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});
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return p;
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});
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});
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return bundles[optionsJson];
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});
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};
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Server.prototype._informChangeWatchers = function() {
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var watchers = this._changeWatchers;
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var headers = {
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'Content-Type': 'application/json; charset=UTF-8',
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};
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watchers.forEach(function(w) {
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w.res.writeHead(205, headers);
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w.res.end(JSON.stringify({ changed: true }));
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});
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this._changeWatchers = [];
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};
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Server.prototype.end = function() {
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Promise.all([
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this._fileWatcher.end(),
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this._bundler.kill(),
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]);
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};
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var bundleOpts = declareOpts({
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const bundleOpts = declareOpts({
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sourceMapUrl: {
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type: 'string',
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required: false,
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@ -199,245 +90,351 @@ var bundleOpts = declareOpts({
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},
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});
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Server.prototype.buildBundle = function(options) {
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var opts = bundleOpts(options);
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class Server {
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constructor(options) {
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const opts = validateOpts(options);
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return this._bundler.bundle(
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opts.entryFile,
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opts.runModule,
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opts.sourceMapUrl,
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opts.dev
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);
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};
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this._projectRoots = opts.projectRoots;
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this._bundles = Object.create(null);
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this._changeWatchers = [];
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Server.prototype.buildBundleFromUrl = function(reqUrl) {
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var options = getOptionsFromUrl(reqUrl);
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return this.buildBundle(options);
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};
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const assetGlobs = opts.assetExts.map(ext => '**/*.' + ext);
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Server.prototype.getDependencies = function(main) {
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return this._bundler.getDependencies(main);
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};
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var watchRootConfigs = opts.projectRoots.map(dir => {
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return {
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dir: dir,
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globs: [
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'**/*.js',
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'**/*.json',
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].concat(assetGlobs),
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};
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});
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Server.prototype._processDebugRequest = function(reqUrl, res) {
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var ret = '<!doctype html>';
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var pathname = url.parse(reqUrl).pathname;
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var parts = pathname.split('/').filter(Boolean);
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if (parts.length === 1) {
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ret += '<div><a href="/debug/bundles">Cached Bundles</a></div>';
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ret += '<div><a href="/debug/graph">Dependency Graph</a></div>';
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res.end(ret);
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} else if (parts[1] === 'bundles') {
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ret += '<h1> Cached Bundles </h1>';
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Promise.all(Object.keys(this._bundles).map(function(optionsJson) {
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return this._bundles[optionsJson].then(function(p) {
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ret += '<div><h2>' + optionsJson + '</h2>';
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ret += p.getDebugInfo();
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});
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}, this)).then(
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function() { res.end(ret); },
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function(e) {
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res.writeHead(500);
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res.end('Internal Error');
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console.log(e.stack);
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}
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);
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} else if (parts[1] === 'graph'){
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ret += '<h1> Dependency Graph </h2>';
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ret += this._bundler.getGraphDebugInfo();
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res.end(ret);
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} else {
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res.writeHead('404');
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res.end('Invalid debug request');
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return;
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}
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};
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Server.prototype._processOnChangeRequest = function(req, res) {
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var watchers = this._changeWatchers;
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watchers.push({
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req: req,
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res: res,
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});
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req.on('close', function() {
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for (var i = 0; i < watchers.length; i++) {
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if (watchers[i] && watchers[i].req === req) {
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watchers.splice(i, 1);
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break;
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}
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if (opts.assetRoots != null) {
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watchRootConfigs = watchRootConfigs.concat(
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opts.assetRoots.map(dir => {
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return {
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dir: dir,
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globs: assetGlobs,
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};
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})
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);
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}
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});
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};
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Server.prototype._processAssetsRequest = function(req, res) {
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var urlObj = url.parse(req.url, true);
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var assetPath = urlObj.pathname.match(/^\/assets\/(.+)$/);
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this._assetServer.get(assetPath[1])
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.then(
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function(data) {
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res.end(data);
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},
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function(error) {
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console.error(error.stack);
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res.writeHead('404');
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res.end('Asset not found');
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}
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).done();
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};
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this._fileWatcher = options.nonPersistent
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? FileWatcher.createDummyWatcher()
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: new FileWatcher(watchRootConfigs);
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Server.prototype._processProfile = function(req, res) {
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console.log('Dumping profile information...');
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var dumpName = '/tmp/dump_' + Date.now() + '.json';
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var prefix = process.env.TRACE_VIEWER_PATH || '';
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var cmd = path.join(prefix, 'trace2html') + ' ' + dumpName;
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fs.writeFileSync(dumpName, req.rawBody);
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exec(cmd, function (error) {
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if (error) {
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if (error.code === 127) {
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console.error(
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'\n** Failed executing `' + cmd + '` **\n\n' +
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'Google trace-viewer is required to visualize the data, do you have it installled?\n\n' +
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'You can get it at:\n\n' +
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' https://github.com/google/trace-viewer\n\n' +
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'If it\'s not in your path, you can set a custom path with:\n\n' +
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' TRACE_VIEWER_PATH=/path/to/trace-viewer\n\n' +
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'NOTE: Your profile data was kept at:\n\n' +
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' ' + dumpName
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);
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} else {
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console.error('Unknown error', error);
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}
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res.end();
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return;
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this._assetServer = new AssetServer({
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projectRoots: opts.projectRoots,
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assetExts: opts.assetExts,
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});
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const bundlerOpts = Object.create(opts);
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bundlerOpts.fileWatcher = this._fileWatcher;
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bundlerOpts.assetServer = this._assetServer;
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this._bundler = new Bundler(bundlerOpts);
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this._fileWatcher.on('all', this._onFileChange.bind(this));
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this._debouncedFileChangeHandler = _.debounce(filePath => {
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this._rebuildBundles(filePath);
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this._informChangeWatchers();
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}, 50);
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}
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end() {
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Promise.all([
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this._fileWatcher.end(),
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this._bundler.kill(),
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]);
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}
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buildBundle(options) {
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const opts = bundleOpts(options);
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return this._bundler.bundle(
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opts.entryFile,
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opts.runModule,
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opts.sourceMapUrl,
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opts.dev
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);
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}
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buildBundleFromUrl(reqUrl) {
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const options = this._getOptionsFromUrl(reqUrl);
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return this.buildBundle(options);
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}
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getDependencies(main) {
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return this._bundler.getDependencies(main);
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}
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_onFileChange(type, filepath, root) {
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const absPath = path.join(root, filepath);
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this._bundler.invalidateFile(absPath);
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// Make sure the file watcher event runs through the system before
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// we rebuild the bundles.
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this._debouncedFileChangeHandler(absPath);
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}
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_rebuildBundles() {
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const buildBundle = this.buildBundle.bind(this);
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const bundles = this._bundles;
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Object.keys(bundles).forEach(function(optionsJson) {
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const options = JSON.parse(optionsJson);
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// Wait for a previous build (if exists) to finish.
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bundles[optionsJson] = (bundles[optionsJson] || Promise.resolve()).finally(function() {
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// With finally promise callback we can't change the state of the promise
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// so we need to reassign the promise.
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bundles[optionsJson] = buildBundle(options).then(function(p) {
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// Make a throwaway call to getSource to cache the source string.
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p.getSource({
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inlineSourceMap: options.inlineSourceMap,
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minify: options.minify,
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});
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return p;
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});
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});
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return bundles[optionsJson];
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});
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}
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_informChangeWatchers() {
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const watchers = this._changeWatchers;
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const headers = {
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'Content-Type': 'application/json; charset=UTF-8',
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};
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watchers.forEach(function(w) {
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w.res.writeHead(205, headers);
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w.res.end(JSON.stringify({ changed: true }));
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});
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this._changeWatchers = [];
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}
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_processDebugRequest(reqUrl, res) {
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var ret = '<!doctype html>';
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const pathname = url.parse(reqUrl).pathname;
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const parts = pathname.split('/').filter(Boolean);
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if (parts.length === 1) {
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ret += '<div><a href="/debug/bundles">Cached Bundles</a></div>';
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ret += '<div><a href="/debug/graph">Dependency Graph</a></div>';
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res.end(ret);
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} else if (parts[1] === 'bundles') {
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ret += '<h1> Cached Bundles </h1>';
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Promise.all(Object.keys(this._bundles).map(optionsJson =>
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this._bundles[optionsJson].then(p => {
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ret += '<div><h2>' + optionsJson + '</h2>';
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ret += p.getDebugInfo();
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})
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)).then(
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() => res.end(ret),
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e => {
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res.writeHead(500);
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res.end('Internal Error');
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console.log(e.stack);
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}
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);
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} else if (parts[1] === 'graph'){
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ret += '<h1> Dependency Graph </h2>';
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ret += this._bundler.getGraphDebugInfo();
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res.end(ret);
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} else {
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exec('rm ' + dumpName);
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exec('open ' + dumpName.replace(/json$/, 'html'), function (error) {
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if (error) {
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console.error(error);
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res.writeHead('404');
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res.end('Invalid debug request');
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return;
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}
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}
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_processOnChangeRequest(req, res) {
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const watchers = this._changeWatchers;
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watchers.push({
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req: req,
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res: res,
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});
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req.on('close', () => {
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for (let i = 0; i < watchers.length; i++) {
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if (watchers[i] && watchers[i].req === req) {
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watchers.splice(i, 1);
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break;
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}
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}
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});
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}
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_processAssetsRequest(req, res) {
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const urlObj = url.parse(req.url, true);
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const assetPath = urlObj.pathname.match(/^\/assets\/(.+)$/);
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this._assetServer.get(assetPath[1])
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.then(
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data => res.end(data),
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error => {
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console.error(error.stack);
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res.writeHead('404');
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res.end('Asset not found');
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}
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).done();
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}
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_processProfile(req, res) {
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console.log('Dumping profile information...');
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const dumpName = '/tmp/dump_' + Date.now() + '.json';
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const prefix = process.env.TRACE_VIEWER_PATH || '';
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const cmd = path.join(prefix, 'trace2html') + ' ' + dumpName;
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fs.writeFileSync(dumpName, req.rawBody);
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exec(cmd, error => {
|
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if (error) {
|
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if (error.code === 127) {
|
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console.error(
|
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'\n** Failed executing `' + cmd + '` **\n\n' +
|
||||
'Google trace-viewer is required to visualize the data, do you have it installled?\n\n' +
|
||||
'You can get it at:\n\n' +
|
||||
' https://github.com/google/trace-viewer\n\n' +
|
||||
'If it\'s not in your path, you can set a custom path with:\n\n' +
|
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' TRACE_VIEWER_PATH=/path/to/trace-viewer\n\n' +
|
||||
'NOTE: Your profile data was kept at:\n\n' +
|
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' ' + dumpName
|
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);
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} else {
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console.error('Unknown error', error);
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}
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res.end();
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});
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}
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});
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};
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Server.prototype.processRequest = function(req, res, next) {
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var urlObj = url.parse(req.url, true);
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var pathname = urlObj.pathname;
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var requestType;
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if (pathname.match(/\.bundle$/)) {
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requestType = 'bundle';
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} else if (pathname.match(/\.map$/)) {
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requestType = 'map';
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} else if (pathname.match(/^\/debug/)) {
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this._processDebugRequest(req.url, res);
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return;
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} else if (pathname.match(/^\/onchange\/?$/)) {
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||||
this._processOnChangeRequest(req, res);
|
||||
return;
|
||||
} else if (pathname.match(/^\/assets\//)) {
|
||||
this._processAssetsRequest(req, res);
|
||||
return;
|
||||
} else if (pathname.match(/^\/profile\/?$/)) {
|
||||
this._processProfile(req, res);
|
||||
return;
|
||||
} else {
|
||||
next();
|
||||
return;
|
||||
}
|
||||
|
||||
var startReqEventId = Activity.startEvent('request:' + req.url);
|
||||
var options = getOptionsFromUrl(req.url);
|
||||
var optionsJson = JSON.stringify(options);
|
||||
var building = this._bundles[optionsJson] || this.buildBundle(options);
|
||||
|
||||
this._bundles[optionsJson] = building;
|
||||
building.then(
|
||||
function(p) {
|
||||
if (requestType === 'bundle') {
|
||||
var bundleSource = p.getSource({
|
||||
inlineSourceMap: options.inlineSourceMap,
|
||||
minify: options.minify,
|
||||
return;
|
||||
} else {
|
||||
exec('rm ' + dumpName);
|
||||
exec('open ' + dumpName.replace(/json$/, 'html'), err => {
|
||||
if (err) {
|
||||
console.error(err);
|
||||
}
|
||||
res.end();
|
||||
});
|
||||
res.setHeader('Content-Type', 'application/javascript');
|
||||
res.end(bundleSource);
|
||||
Activity.endEvent(startReqEventId);
|
||||
} else if (requestType === 'map') {
|
||||
var sourceMap = JSON.stringify(p.getSourceMap());
|
||||
res.setHeader('Content-Type', 'application/json');
|
||||
res.end(sourceMap);
|
||||
Activity.endEvent(startReqEventId);
|
||||
}
|
||||
},
|
||||
this._handleError.bind(this, res, optionsJson)
|
||||
).done();
|
||||
};
|
||||
|
||||
Server.prototype._handleError = function(res, bundleID, error) {
|
||||
res.writeHead(error.status || 500, {
|
||||
'Content-Type': 'application/json; charset=UTF-8',
|
||||
});
|
||||
|
||||
if (error.type === 'TransformError' || error.type === 'NotFoundError') {
|
||||
error.errors = [{
|
||||
description: error.description,
|
||||
filename: error.filename,
|
||||
lineNumber: error.lineNumber,
|
||||
}];
|
||||
res.end(JSON.stringify(error));
|
||||
|
||||
if (error.type === 'NotFoundError') {
|
||||
delete this._bundles[bundleID];
|
||||
}
|
||||
} else {
|
||||
console.error(error.stack || error);
|
||||
res.end(JSON.stringify({
|
||||
type: 'InternalError',
|
||||
message: 'react-packager has encountered an internal error, ' +
|
||||
'please check your terminal error output for more details',
|
||||
}));
|
||||
}
|
||||
};
|
||||
|
||||
function getOptionsFromUrl(reqUrl) {
|
||||
// `true` to parse the query param as an object.
|
||||
var urlObj = url.parse(reqUrl, true);
|
||||
// node v0.11.14 bug see https://github.com/facebook/react-native/issues/218
|
||||
urlObj.query = urlObj.query || {};
|
||||
|
||||
var pathname = decodeURIComponent(urlObj.pathname);
|
||||
|
||||
// Backwards compatibility. Options used to be as added as '.' to the
|
||||
// entry module name. We can safely remove these options.
|
||||
var entryFile = pathname.replace(/^\//, '').split('.').filter(function(part) {
|
||||
if (part === 'includeRequire' || part === 'runModule' ||
|
||||
part === 'bundle' || part === 'map') {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}).join('.') + '.js';
|
||||
|
||||
return {
|
||||
sourceMapUrl: pathname.replace(/\.bundle$/, '.map'),
|
||||
entryFile: entryFile,
|
||||
dev: getBoolOptionFromQuery(urlObj.query, 'dev', true),
|
||||
minify: getBoolOptionFromQuery(urlObj.query, 'minify'),
|
||||
runModule: getBoolOptionFromQuery(urlObj.query, 'runModule', true),
|
||||
inlineSourceMap: getBoolOptionFromQuery(
|
||||
urlObj.query,
|
||||
'inlineSourceMap',
|
||||
false
|
||||
),
|
||||
};
|
||||
}
|
||||
|
||||
function getBoolOptionFromQuery(query, opt, defaultVal) {
|
||||
if (query[opt] == null && defaultVal != null) {
|
||||
return defaultVal;
|
||||
});
|
||||
}
|
||||
|
||||
return query[opt] === 'true' || query[opt] === '1';
|
||||
processRequest(req, res, next) {
|
||||
const urlObj = url.parse(req.url, true);
|
||||
var pathname = urlObj.pathname;
|
||||
|
||||
var requestType;
|
||||
if (pathname.match(/\.bundle$/)) {
|
||||
requestType = 'bundle';
|
||||
} else if (pathname.match(/\.map$/)) {
|
||||
requestType = 'map';
|
||||
} else if (pathname.match(/^\/debug/)) {
|
||||
this._processDebugRequest(req.url, res);
|
||||
return;
|
||||
} else if (pathname.match(/^\/onchange\/?$/)) {
|
||||
this._processOnChangeRequest(req, res);
|
||||
return;
|
||||
} else if (pathname.match(/^\/assets\//)) {
|
||||
this._processAssetsRequest(req, res);
|
||||
return;
|
||||
} else if (pathname.match(/^\/profile\/?$/)) {
|
||||
this._processProfile(req, res);
|
||||
return;
|
||||
} else {
|
||||
next();
|
||||
return;
|
||||
}
|
||||
|
||||
const startReqEventId = Activity.startEvent('request:' + req.url);
|
||||
const options = this._getOptionsFromUrl(req.url);
|
||||
const optionsJson = JSON.stringify(options);
|
||||
const building = this._bundles[optionsJson] || this.buildBundle(options);
|
||||
|
||||
this._bundles[optionsJson] = building;
|
||||
building.then(
|
||||
p => {
|
||||
if (requestType === 'bundle') {
|
||||
var bundleSource = p.getSource({
|
||||
inlineSourceMap: options.inlineSourceMap,
|
||||
minify: options.minify,
|
||||
});
|
||||
res.setHeader('Content-Type', 'application/javascript');
|
||||
res.end(bundleSource);
|
||||
Activity.endEvent(startReqEventId);
|
||||
} else if (requestType === 'map') {
|
||||
var sourceMap = JSON.stringify(p.getSourceMap());
|
||||
res.setHeader('Content-Type', 'application/json');
|
||||
res.end(sourceMap);
|
||||
Activity.endEvent(startReqEventId);
|
||||
}
|
||||
},
|
||||
this._handleError.bind(this, res, optionsJson)
|
||||
).done();
|
||||
}
|
||||
|
||||
_handleError(res, bundleID, error) {
|
||||
res.writeHead(error.status || 500, {
|
||||
'Content-Type': 'application/json; charset=UTF-8',
|
||||
});
|
||||
|
||||
if (error.type === 'TransformError' || error.type === 'NotFoundError') {
|
||||
error.errors = [{
|
||||
description: error.description,
|
||||
filename: error.filename,
|
||||
lineNumber: error.lineNumber,
|
||||
}];
|
||||
res.end(JSON.stringify(error));
|
||||
|
||||
if (error.type === 'NotFoundError') {
|
||||
delete this._bundles[bundleID];
|
||||
}
|
||||
} else {
|
||||
console.error(error.stack || error);
|
||||
res.end(JSON.stringify({
|
||||
type: 'InternalError',
|
||||
message: 'react-packager has encountered an internal error, ' +
|
||||
'please check your terminal error output for more details',
|
||||
}));
|
||||
}
|
||||
}
|
||||
|
||||
_getOptionsFromUrl(reqUrl) {
|
||||
// `true` to parse the query param as an object.
|
||||
const urlObj = url.parse(reqUrl, true);
|
||||
// node v0.11.14 bug see https://github.com/facebook/react-native/issues/218
|
||||
urlObj.query = urlObj.query || {};
|
||||
|
||||
const pathname = decodeURIComponent(urlObj.pathname);
|
||||
|
||||
// Backwards compatibility. Options used to be as added as '.' to the
|
||||
// entry module name. We can safely remove these options.
|
||||
const entryFile = pathname.replace(/^\//, '').split('.').filter(part => {
|
||||
if (part === 'includeRequire' || part === 'runModule' ||
|
||||
part === 'bundle' || part === 'map') {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}).join('.') + '.js';
|
||||
|
||||
return {
|
||||
sourceMapUrl: pathname.replace(/\.bundle$/, '.map'),
|
||||
entryFile: entryFile,
|
||||
dev: this._getBoolOptionFromQuery(urlObj.query, 'dev', true),
|
||||
minify: this._getBoolOptionFromQuery(urlObj.query, 'minify'),
|
||||
runModule: this._getBoolOptionFromQuery(urlObj.query, 'runModule', true),
|
||||
inlineSourceMap: this._getBoolOptionFromQuery(
|
||||
urlObj.query,
|
||||
'inlineSourceMap',
|
||||
false
|
||||
),
|
||||
};
|
||||
}
|
||||
|
||||
_getBoolOptionFromQuery(query, opt, defaultVal) {
|
||||
if (query[opt] == null && defaultVal != null) {
|
||||
return defaultVal;
|
||||
}
|
||||
|
||||
return query[opt] === 'true' || query[opt] === '1';
|
||||
}
|
||||
}
|
||||
|
||||
module.exports = Server;
|
||||
|
|
|
|||
Loading…
Reference in New Issue