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filelister.js
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filelister.js
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/**
* Copyright (C) 2012 KO GmbH <jos.van.den.oever@kogmbh.com>
*
* @licstart
* The JavaScript code in this page is free software: you can redistribute it
* and/or modify it under the terms of the GNU Affero General Public License
* (GNU AGPL) as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version. The code is distributed
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU AGPL for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this code. If not, see <http://www.gnu.org/licenses/>.
*
* As additional permission under GNU AGPL version 3 section 7, you
* may distribute non-source (e.g., minimized or compacted) forms of
* that code without the copy of the GNU GPL normally required by
* section 4, provided you include this license notice and a URL
* through which recipients can access the Corresponding Source.
*
* As a special exception to the AGPL, any HTML file which merely makes function
* calls to this code, and for that purpose includes it by reference shall be
* deemed a separate work for copyright law purposes. In addition, the copyright
* holders of this code give you permission to combine this code with free
* software libraries that are released under the GNU LGPL. You may copy and
* distribute such a system following the terms of the GNU AGPL for this code
* and the LGPL for the libraries. If you modify this code, you may extend this
* exception to your version of the code, but you are not obligated to do so.
* If you do not wish to do so, delete this exception statement from your
* version.
*
* This license applies to this entire compilation.
* @licend
* @source: http://www.webodf.org/
* @source: https://github.com/kogmbh/WebODF/
*/
/*global XMLHttpRequest*/
/*jslint regexp: true*/
/** asynchroneous function that lists all files **/
function listFiles(startdir, filepattern, fileCallback, doneCallback) {
"use strict";
var todoList = [],
doneList = [],
dirpattern = /\/$/,
hasWEBDAV = false;
function getHref(responseElement) {
var n = responseElement.firstChild;
while (n && !(n.namespaceURI === 'DAV:' && n.localName === 'href')) {
n = n.nextSibling;
}
return n && n.firstChild && n.firstChild.nodeValue;
}
function isDirectory(responseElement) {
var n = responseElement.firstChild;
while (n &&
!(n.namespaceURI === 'DAV:' && n.localName === 'propstat')) {
n = n.nextSibling;
}
n = n && n.firstChild;
while (n &&
!(n.namespaceURI === 'DAV:' && n.localName === 'prop')) {
n = n.nextSibling;
}
n = n && n.firstChild;
while (n && !(n.namespaceURI === 'DAV:' &&
n.localName === 'resourcetype')) {
n = n.nextSibling;
}
n = n && n.firstChild;
while (n &&
!(n.namespaceURI === 'DAV:' && n.localName === 'collection')) {
n = n.nextSibling;
}
return n;
}
function processWebDavResponse(xml) {
if (!xml) {
throw new Error('No proper XML response.');
}
var refs = xml.getElementsByTagNameNS('DAV:', 'response'),
directories = [],
files = [],
i,
d,
href;
if (refs.length === 0) {
throw new Error('No proper XML response.');
}
for (i = 0; i < refs.length; i += 1) {
href = getHref(refs[i]);
if (isDirectory(refs[i])) {
directories.push(href);
} else if (filepattern.test(href)) {
files.push(href);
}
}
for (i = 0; i < directories.length; i += 1) {
d = directories[i];
if (doneList.indexOf(d) === -1 && todoList.indexOf(d) === -1) {
todoList.push(d);
}
}
fileCallback(directories, files);
}
function processIndexHtmlResponse(base, text) {
// use regex because index.html is usually not valid xml
var re = /href="([^\/\?"][^"]*)"/ig,
matches,
files = [],
directories = [],
name,
d,
i;
while ((matches = re.exec(text)) !== null) {
name = matches[1];
if (dirpattern.test(name)) {
directories.push(base + name);
} else if (filepattern.test(name)) {
files.push(base + name);
}
}
for (i = 0; i < directories.length; i += 1) {
d = directories[i];
if (doneList.indexOf(d) === -1 && todoList.indexOf(d) === -1) {
todoList.push(d);
}
}
fileCallback(directories, files);
}
function getNextFileListWithIndexHtml() {
var url = todoList.shift(),
req;
while (url && typeof url !== 'string') {
url = todoList.shift();
}
if (!url) {
if (doneCallback) {
doneCallback();
}
return;
}
req = new XMLHttpRequest();
req.open('GET', url, true);
req.onreadystatechange = function (evt) {
if (req.readyState !== 4) {
return;
}
if (req.status >= 200 && req.status < 300) {
processIndexHtmlResponse(url, req.responseText);
}
getNextFileListWithIndexHtml();
};
req.send(null);
doneList.push(url);
}
function getNextFileListWithWebDav() {
var url = todoList.shift(),
req;
if (!url) {
if (doneCallback) {
doneCallback();
}
return;
}
req = new XMLHttpRequest();
req.open('PROPFIND', url, true);
req.onreadystatechange = function (evt) {
if (req.readyState !== 4) {
return;
}
if (req.status >= 200 && req.status < 300) {
try {
processWebDavResponse(req.responseXML);
hasWEBDAV = true;
} catch (e) {
}
}
if (hasWEBDAV) {
getNextFileListWithWebDav();
} else {
todoList.push(url);
doneList = [];
getNextFileListWithIndexHtml();
}
};
req.setRequestHeader('Depth', '1');
req.send(null);
doneList.push(url);
}
todoList.push(startdir);
getNextFileListWithWebDav();
}