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Diffstat (limited to 'mobile/android/components/extensions/ext-downloads.js')
| -rw-r--r-- | mobile/android/components/extensions/ext-downloads.js | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/mobile/android/components/extensions/ext-downloads.js b/mobile/android/components/extensions/ext-downloads.js new file mode 100644 index 0000000000..56fd58c3e2 --- /dev/null +++ b/mobile/android/components/extensions/ext-downloads.js @@ -0,0 +1,300 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +"use strict"; + +ChromeUtils.defineESModuleGetters(this, { + DownloadPaths: "resource://gre/modules/DownloadPaths.sys.mjs", +}); +XPCOMUtils.defineLazyModuleGetters(this, { + DownloadTracker: "resource://gre/modules/GeckoViewWebExtension.jsm", +}); + +Cu.importGlobalProperties(["PathUtils"]); + +var { ignoreEvent } = ExtensionCommon; + +const REQUEST_DOWNLOAD_MESSAGE = "GeckoView:WebExtension:Download"; + +const FORBIDDEN_HEADERS = [ + "ACCEPT-CHARSET", + "ACCEPT-ENCODING", + "ACCESS-CONTROL-REQUEST-HEADERS", + "ACCESS-CONTROL-REQUEST-METHOD", + "CONNECTION", + "CONTENT-LENGTH", + "COOKIE", + "COOKIE2", + "DATE", + "DNT", + "EXPECT", + "HOST", + "KEEP-ALIVE", + "ORIGIN", + "TE", + "TRAILER", + "TRANSFER-ENCODING", + "UPGRADE", + "VIA", +]; + +const FORBIDDEN_PREFIXES = /^PROXY-|^SEC-/i; + +const State = { + IN_PROGRESS: "in_progress", + INTERRUPTED: "interrupted", + COMPLETE: "complete", +}; + +const STATE_MAP = new Map([ + [0, State.IN_PROGRESS], + [1, State.INTERRUPTED], + [2, State.COMPLETE], +]); + +const INTERRUPT_REASON_MAP = new Map([ + [0, undefined], + [1, "FILE_FAILED"], + [2, "FILE_ACCESS_DENIED"], + [3, "FILE_NO_SPACE"], + [4, "FILE_NAME_TOO_LONG"], + [5, "FILE_TOO_LARGE"], + [6, "FILE_VIRUS_INFECTED"], + [7, "FILE_TRANSIENT_ERROR"], + [8, "FILE_BLOCKED"], + [9, "FILE_SECURITY_CHECK_FAILED"], + [10, "FILE_TOO_SHORT"], + [11, "NETWORK_FAILED"], + [12, "NETWORK_TIMEOUT"], + [13, "NETWORK_DISCONNECTED"], + [14, "NETWORK_SERVER_DOWN"], + [15, "NETWORK_INVALID_REQUEST"], + [16, "SERVER_FAILED"], + [17, "SERVER_NO_RANGE"], + [18, "SERVER_BAD_CONTENT"], + [19, "SERVER_UNAUTHORIZED"], + [20, "SERVER_CERT_PROBLEM"], + [21, "SERVER_FORBIDDEN"], + [22, "USER_CANCELED"], + [23, "USER_SHUTDOWN"], + [24, "CRASH"], +]); + +// TODO Bug 1247794: make id and extension info persistent +class DownloadItem { + /** + * Initializes an object that represents a download + * + * @param {object} downloadInfo - an object from Java when creating a download + * @param {object} options - an object passed in to download() function + * @param {Extension} extension - instance of an extension object + */ + constructor(downloadInfo, options, extension) { + this.id = downloadInfo.id; + this.url = options.url; + this.referrer = downloadInfo.referrer || ""; + this.filename = downloadInfo.filename || ""; + this.incognito = options.incognito; + this.danger = "safe"; // todo; not implemented in desktop either + this.mime = downloadInfo.mime || ""; + this.startTime = downloadInfo.startTime; + this.state = STATE_MAP.get(downloadInfo.state); + this.paused = downloadInfo.paused; + this.canResume = downloadInfo.canResume; + this.bytesReceived = downloadInfo.bytesReceived; + this.totalBytes = downloadInfo.totalBytes; + this.fileSize = downloadInfo.fileSize; + this.exists = downloadInfo.exists; + this.byExtensionId = extension?.id; + this.byExtensionName = extension?.name; + } + + /** + * This function updates the download item it was called on. + * + * @param {object} data that arrived from the app (Java) + * @returns {object | null} an object of <a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/downloads/onChanged#downloaddelta>downloadDelta type</a> + */ + update(data) { + const { downloadItemId } = data; + const delta = {}; + + data.state = STATE_MAP.get(data.state); + data.error = INTERRUPT_REASON_MAP.get(data.error); + delete data.downloadItemId; + + let changed = false; + for (const prop in data) { + const current = data[prop] ?? null; + const previous = this[prop] ?? null; + if (current !== previous) { + delta[prop] = { current, previous }; + this[prop] = current; + changed = true; + } + } + + // Don't send empty onChange events + if (!changed) { + return null; + } + + delta.id = downloadItemId; + + return delta; + } +} + +this.downloads = class extends ExtensionAPI { + getAPI(context) { + const { extension } = context; + return { + downloads: { + download(options) { + // the validation checks should be kept in sync with the toolkit implementation + const { filename } = options; + if (filename != null) { + if (!filename.length) { + return Promise.reject({ message: "filename must not be empty" }); + } + + if (PathUtils.isAbsolute(filename)) { + return Promise.reject({ + message: "filename must not be an absolute path", + }); + } + + const pathComponents = PathUtils.splitRelative(filename, { + allowEmpty: true, + allowCurrentDir: true, + allowParentDir: true, + }); + + if (pathComponents.some(component => component == "..")) { + return Promise.reject({ + message: "filename must not contain back-references (..)", + }); + } + + if ( + pathComponents.some(component => { + const sanitized = DownloadPaths.sanitize(component, { + compressWhitespaces: false, + }); + return component != sanitized; + }) + ) { + return Promise.reject({ + message: "filename must not contain illegal characters", + }); + } + } + + if (options.incognito && !context.privateBrowsingAllowed) { + return Promise.reject({ + message: "Private browsing access not allowed", + }); + } + + if (options.cookieStoreId != null) { + // https://bugzilla.mozilla.org/show_bug.cgi?id=1721460 + throw new ExtensionError("Not implemented"); + } + + if (options.headers) { + for (const { name } of options.headers) { + if ( + FORBIDDEN_HEADERS.includes(name.toUpperCase()) || + name.match(FORBIDDEN_PREFIXES) + ) { + return Promise.reject({ + message: "Forbidden request header name", + }); + } + } + } + + return EventDispatcher.instance + .sendRequestForResult({ + type: REQUEST_DOWNLOAD_MESSAGE, + options, + extensionId: extension.id, + }) + .then(value => { + const downloadItem = new DownloadItem(value, options, extension); + DownloadTracker.addDownloadItem(downloadItem); + return downloadItem.id; + }); + }, + + removeFile(downloadId) { + throw new ExtensionError("Not implemented"); + }, + + search(query) { + throw new ExtensionError("Not implemented"); + }, + + pause(downloadId) { + throw new ExtensionError("Not implemented"); + }, + + resume(downloadId) { + throw new ExtensionError("Not implemented"); + }, + + cancel(downloadId) { + throw new ExtensionError("Not implemented"); + }, + + showDefaultFolder() { + throw new ExtensionError("Not implemented"); + }, + + erase(query) { + throw new ExtensionError("Not implemented"); + }, + + open(downloadId) { + throw new ExtensionError("Not implemented"); + }, + + show(downloadId) { + throw new ExtensionError("Not implemented"); + }, + + getFileIcon(downloadId, options) { + throw new ExtensionError("Not implemented"); + }, + + onChanged: new EventManager({ + context, + name: "downloads.onChanged", + register: fire => { + const listener = (eventName, event) => { + const { delta, downloadItem } = event; + if (context.privateBrowsingAllowed || !downloadItem.incognito) { + fire.async(delta); + } + }; + + DownloadTracker.on("download-changed", listener); + return () => { + DownloadTracker.off("download-changed", listener); + }; + }, + }).api(), + + onCreated: ignoreEvent(context, "downloads.onCreated"), + + onErased: ignoreEvent(context, "downloads.onErased"), + + onDeterminingFilename: ignoreEvent( + context, + "downloads.onDeterminingFilename" + ), + }, + }; + } +}; |