| // Licensed to the Software Freedom Conservancy (SFC) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The SFC licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| /** @fileoverview Utilities for working with Firefox extensions. */ |
| |
| 'use strict'; |
| |
| const fs = require('fs'), |
| path = require('path'), |
| xml = require('xml2js'); |
| |
| const io = require('../io'); |
| const zip = require('../io/zip'); |
| |
| |
| /** |
| * Thrown when there an add-on is malformed. |
| */ |
| class AddonFormatError extends Error { |
| /** @param {string} msg The error message. */ |
| constructor(msg) { |
| super(msg); |
| /** @override */ |
| this.name = this.constructor.name; |
| } |
| } |
| |
| |
| |
| /** |
| * Installs an extension to the given directory. |
| * @param {string} extension Path to the extension to install, as either a xpi |
| * file or a directory. |
| * @param {string} dir Path to the directory to install the extension in. |
| * @return {!Promise<string>} A promise for the add-on ID once |
| * installed. |
| */ |
| function install(extension, dir) { |
| return getDetails(extension).then(function(details) { |
| var dst = path.join(dir, details.id); |
| if (extension.slice(-4) === '.xpi') { |
| if (!details.unpack) { |
| return io.copy(extension, dst + '.xpi').then(() => details.id); |
| } else { |
| return zip.unzip(extension, dst).then(() => details.id); |
| } |
| } else { |
| return io.copyDir(extension, dst).then(() => details.id); |
| } |
| }); |
| } |
| |
| |
| /** |
| * Describes a Firefox add-on. |
| * @typedef {{id: string, name: string, version: string, unpack: boolean}} |
| */ |
| var AddonDetails; |
| |
| /** @typedef {{$: !Object<string, string>}} */ |
| var RdfRoot; |
| |
| |
| /** |
| * Extracts the details needed to install an add-on. |
| * @param {string} addonPath Path to the extension directory. |
| * @return {!Promise<!AddonDetails>} A promise for the add-on details. |
| */ |
| function getDetails(addonPath) { |
| return io.stat(addonPath).then((stats) => { |
| if (stats.isDirectory()) { |
| return parseDirectory(addonPath); |
| } else if (addonPath.slice(-4) === '.xpi') { |
| return parseXpiFile(addonPath); |
| } else { |
| throw Error('Add-on path is not an xpi or a directory: ' + addonPath); |
| } |
| }); |
| |
| /** |
| * Parse an install.rdf for a Firefox add-on. |
| * @param {string} rdf The contents of install.rdf for the add-on. |
| * @return {!Promise<!AddonDetails>} A promise for the add-on details. |
| */ |
| function parseInstallRdf(rdf) { |
| return parseXml(rdf).then(function(doc) { |
| var em = getNamespaceId(doc, 'http://www.mozilla.org/2004/em-rdf#'); |
| var rdf = getNamespaceId( |
| doc, 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'); |
| |
| var description = doc[rdf + 'RDF'][rdf + 'Description'][0]; |
| var details = { |
| id: getNodeText(description, em + 'id'), |
| name: getNodeText(description, em + 'name'), |
| version: getNodeText(description, em + 'version'), |
| unpack: getNodeText(description, em + 'unpack') || false |
| }; |
| |
| if (typeof details.unpack === 'string') { |
| details.unpack = details.unpack.toLowerCase() === 'true'; |
| } |
| |
| if (!details.id) { |
| throw new AddonFormatError('Could not find add-on ID for ' + addonPath); |
| } |
| |
| return details; |
| }); |
| |
| function parseXml(text) { |
| return new Promise((resolve, reject) => { |
| xml.parseString(text, (err, data) => { |
| if (err) { |
| reject(err); |
| } else { |
| resolve(data); |
| } |
| }); |
| }); |
| } |
| |
| function getNodeText(node, name) { |
| return node[name] && node[name][0] || ''; |
| } |
| |
| function getNamespaceId(doc, url) { |
| var keys = Object.keys(doc); |
| if (keys.length !== 1) { |
| throw new AddonFormatError('Malformed manifest for add-on ' + addonPath); |
| } |
| |
| var namespaces = /** @type {!RdfRoot} */(doc[keys[0]]).$; |
| var id = ''; |
| Object.keys(namespaces).some(function(ns) { |
| if (namespaces[ns] !== url) { |
| return false; |
| } |
| |
| if (ns.indexOf(':') != -1) { |
| id = ns.split(':')[1] + ':'; |
| } |
| return true; |
| }); |
| return id; |
| } |
| } |
| |
| /** |
| * Parse a manifest for a Firefox WebExtension. |
| * @param {{ |
| * name: string, |
| * version: string, |
| * applications: {gecko:{id:string}} |
| * }} json JSON representation of the manifest. |
| * @return {!AddonDetails} The add-on details. |
| */ |
| function parseManifestJson({name, version, applications}) { |
| if (!(applications && applications.gecko && applications.gecko.id)) { |
| throw new AddonFormatError('Could not find add-on ID for ' + addonPath); |
| } |
| |
| return {id: applications.gecko.id, name, version, unpack: false}; |
| } |
| |
| function parseXpiFile(filePath) { |
| return zip.load(filePath).then(archive => { |
| if (archive.has('install.rdf')) { |
| return archive.getFile('install.rdf') |
| .then(buf => parseInstallRdf(buf.toString('utf8'))); |
| } |
| |
| if (archive.has('manifest.json')) { |
| return archive.getFile('manifest.json') |
| .then(buf => JSON.parse(buf.toString('utf8'))) |
| .then(parseManifestJson); |
| } |
| |
| throw new AddonFormatError( |
| `Couldn't find install.rdf or manifest.json in ${filePath}`); |
| }); |
| } |
| |
| function parseDirectory(dirPath) { |
| const rdfPath = path.join(dirPath, 'install.rdf'); |
| const jsonPath = path.join(dirPath, 'manifest.json'); |
| return io.exists(rdfPath) |
| .then(rdfExists => { |
| if (rdfExists) { |
| return io.read(rdfPath) |
| .then(buf => parseInstallRdf(buf.toString('utf8'))); |
| } |
| return io.exists(jsonPath) |
| .then(jsonExists => { |
| if (jsonExists) { |
| return io.read(jsonPath) |
| .then(buf => JSON.parse(buf.toString('utf8'))) |
| .then(parseManifestJson); |
| } |
| throw new AddonFormatError( |
| `Couldn't find install.rdf or manifest.json in ${dirPath}`); |
| }); |
| }) |
| } |
| } |
| |
| |
| // PUBLIC API |
| |
| |
| exports.install = install; |