ios.js for Addon SDK original https://github.com/choobin/cmis

io.js

/*
 Copyright 2012 Christopher Hoobin. All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:

 1. Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above
 copyright notice, this list of conditions and the following
 disclaimer in the documentation and/or other materials provided
 with the distribution.

 THIS SOFTWARE IS PROVIDED BY CHRISTOPHER HOOBIN ''AS IS'' AND ANY
 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CHRISTOPHER HOOBIN OR
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 The views and conclusions contained in the software and documentation
 are those of the authors and should not be interpreted as representing
 official policies, either expressed or implied, of Christopher Hoobin.
 */
var { Ci,Cu,Cc } = require('chrome');
var data = require("sdk/self").data;
const { defer } = require('sdk/core/promise');
Cu.import("resource://gre/modules/Services.jsm");

/**
 * ``saveURL`` Util
 * @param {Window} window
 * @param {nsIURL} sourceURI
 * @param {nsIURL} fileURI
 * @param {string} filename
 * @return {promise} promise
 */
var saveFile = function (window, sourceURI, fileURI, filename){
    var deferred = defer();
    let privacy_context = window
        .QueryInterface(Ci.nsIInterfaceRequestor)
        .getInterface(Ci.nsIWebNavigation);

    let is_private = privacy_context.usePrivateBrowsing;

    // https://developer.mozilla.org/en/nsIWebBrowserPersist
    let persist = Cc["@mozilla.org/embedding/browser/nsWebBrowserPersist;1"]
        .createInstance(Ci.nsIWebBrowserPersist);

    const nsIWebBrowserPersist = Ci.nsIWebBrowserPersist;

    persist.persistFlags =
        nsIWebBrowserPersist.PERSIST_FLAGS_REPLACE_EXISTING_FILES |
            nsIWebBrowserPersist.PERSIST_FLAGS_FROM_CACHE |
            nsIWebBrowserPersist.PERSIST_FLAGS_CLEANUP_ON_FAILURE;

    const nsIDownloadManager = Ci.nsIDownloadManager;

    // https://developer.mozilla.org/en/XPCOM_Interface_Reference/nsIDownloadManager
    let manager = Cc["@mozilla.org/download-manager;1"]
        .getService(nsIDownloadManager);
    manager.addListener({
        /**
         * ステータスが変わる度に呼ばれる
         * @param aState
         * @param {nsIDownload} aDownload
         */
        onDownloadStateChange: function (aState, aDownload){
            const DOWNLOAD_NOTSTARTED = Ci.nsIDownloadManager.DOWNLOAD_NOTSTARTED;
            const DOWNLOAD_DOWNLOADING = Ci.nsIDownloadManager.DOWNLOAD_DOWNLOADING;
            const DOWNLOAD_FINISHED = Ci.nsIDownloadManager.DOWNLOAD_FINISHED;
            const DOWNLOAD_FAILED = Ci.nsIDownloadManager.DOWNLOAD_FAILED;
            const DOWNLOAD_CANCELED = Ci.nsIDownloadManager.DOWNLOAD_CANCELED;
            const DOWNLOAD_PAUSED = Ci.nsIDownloadManager.DOWNLOAD_PAUSED;
            const DOWNLOAD_QUEUED = Ci.nsIDownloadManager.DOWNLOAD_QUEUED;
            const DOWNLOAD_BLOCKED = Ci.nsIDownloadManager.DOWNLOAD_BLOCKED;
            const DOWNLOAD_SCANNING = Ci.nsIDownloadManager.DOWNLOAD_SCANNING;
            var state = aDownload.state;
            if (state == DOWNLOAD_FAILED) {
                deferred.reject(aDownload)
            }
            if (state == DOWNLOAD_FINISHED) {
                // サイズが1MB以下なら失敗とみなす
                var limitSize = 1000 * 1000;// 1000 * 1000Byte
                if (aDownload.size > limitSize) {
                    deferred.resolve(aDownload);
                    return;
                }
                deferred.reject(aDownload);
            }
        }
    });

    let listener = manager.addDownload(
        nsIDownloadManager.DOWNLOAD_TYPE_DOWNLOAD,
        sourceURI,
        fileURI,
        filename,
        null, // mime info
        null, // start time
        null, // tmp file
        persist,
        is_private);

    persist.progressListener = listener;
    persist.saveURI(sourceURI, null, null, null, null, listener.targetFile, privacy_context);
    // Notification
    var notifications = require("sdk/notifications");
    notifications.notify({
        title: "Download Download",
        text: "Start " + filename,
        iconURL: data.url("icon.ico")
    });
    return deferred.promise;
};


exports.saveFile = saveFile;