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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This file contains common utilities to find chrome proxy related elements on
// a page and collect info from them.
(function() {
var PROXY_VIEW_ID = 'proxy-view-tab-content';
var PROXY_VIEW_EFFECTIVE_SETTINGS_ID = 'proxy-view-effective-settings';
var PROXY_VIEW_BAD_PROXIES_ID = 'proxy-view-bad-proxies-div';
var PROXY_VIEW_BAD_PROXIES_TBODY = 'proxy-view-bad-proxies-tbody';
var PRXOY_SETTINGS_PREFIX = 'Proxy server for HTTP: ['
var PROXY_SETTINGS_SIGNATURE = 'proxy.googlezip.net:443, ' +
'compress.googlezip.net:80, direct://';
// Returns the effective proxy in an array from settings.
// An example of the settings is:
// "Proxy server for HTTP: [proxy.googlezip.net:443, " +
// "compress.googlezip.net:80, direct://]"
function getEffectiveProxies(doc) {
var settings = doc.getElementById(PROXY_VIEW_EFFECTIVE_SETTINGS_ID);
if (settings && settings.innerHTML &&
settings.innerHTML.indexOf(PRXOY_SETTINGS_PREFIX) == 0) {
var left = settings.innerHTML.indexOf('[');
var right = settings.innerHTML.indexOf(']');
if (left >= 0 && right > left) {
return settings.innerHTML.substring(left + 1, right).split(/[ ,]+/);
}
}
return [];
}
// Returns an array of bad proxies. Each element is a bad proxy with
// attribute 'proxy' as the proxy name and attribute 'retry' as the
// next retry time.
function getBadProxyList(doc) {
var bad_proxies = doc.getElementById(PROXY_VIEW_BAD_PROXIES_ID);
if (bad_proxies.hasAttribute('style') &&
('cssText' in bad_proxies.style) &&
bad_proxies.style.cssText == 'display: none;') {
return null;
}
var tbody = doc.getElementById(PROXY_VIEW_BAD_PROXIES_TBODY);
results = [];
for (var r = 0, n = tbody.rows.length; r < n; r++) {
results[r] = {};
results[r].proxy = tbody.rows[r].cells[0].innerHTML;
timeSpan = tbody.rows[r].cells[1].getElementsByTagName('span')[0];
if (timeSpan.hasAttribute('title') && timeSpan.title.indexOf('t=') == 0) {
results[r].retry = timeSpan.title.substr(2);
} else {
results[r].retry = '-1';
}
}
return results;
}
function getChromeProxyInfo() {
if (!document.getElementById(PROXY_VIEW_ID)) {
return null;
}
info = {};
info.proxies = getEffectiveProxies(document);
info.enabled = (info.proxies.length > 1 &&
info.proxies[info.proxies.length - 1] == 'direct://' &&
info.proxies[info.proxies.length - 2] != 'direct://');
info.badProxies = getBadProxyList(document);
return info;
};
window.__getChromeProxyInfo = getChromeProxyInfo;
})();
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