| // Copyright (c) 2012 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 view displays information on the host resolver: |
| * |
| * - Shows the default address family. |
| * - Has a button to enable IPv6, if it is disabled. |
| * - Shows the current host cache contents. |
| * - Has a button to clear the host cache. |
| * - Shows the parameters used to construct the host cache (capacity, ttl). |
| */ |
| |
| // TODO(mmenke): Add links for each address entry to the corresponding NetLog |
| // source. This could either be done by adding NetLog source ids |
| // to cache entries, or tracking sources based on their type and |
| // description. Former is simpler, latter may be useful |
| // elsewhere as well. |
| var DnsView = (function() { |
| 'use strict'; |
| |
| // We inherit from DivView. |
| var superClass = DivView; |
| |
| /** |
| * @constructor |
| */ |
| function DnsView() { |
| assertFirstConstructorCall(DnsView); |
| |
| // Call superclass's constructor. |
| superClass.call(this, DnsView.MAIN_BOX_ID); |
| |
| $(DnsView.ENABLE_IPV6_BUTTON_ID).onclick = |
| g_browser.enableIPv6.bind(g_browser); |
| $(DnsView.CLEAR_CACHE_BUTTON_ID).onclick = |
| g_browser.sendClearHostResolverCache.bind(g_browser); |
| |
| // Register to receive changes to the host resolver info. |
| g_browser.addHostResolverInfoObserver(this, false); |
| } |
| |
| DnsView.TAB_ID = 'tab-handle-dns'; |
| DnsView.TAB_NAME = 'DNS'; |
| DnsView.TAB_HASH = '#dns'; |
| |
| // IDs for special HTML elements in dns_view.html |
| DnsView.MAIN_BOX_ID = 'dns-view-tab-content'; |
| DnsView.DEFAULT_FAMILY_SPAN_ID = 'dns-view-default-family'; |
| DnsView.IPV6_DISABLED_SPAN_ID = 'dns-view-ipv6-disabled'; |
| DnsView.ENABLE_IPV6_BUTTON_ID = 'dns-view-enable-ipv6'; |
| |
| DnsView.INTERNAL_DNS_ENABLED_SPAN_ID = 'dns-view-internal-dns-enabled'; |
| DnsView.INTERNAL_DNS_INVALID_CONFIG_SPAN_ID = |
| 'dns-view-internal-dns-invalid-config'; |
| DnsView.INTERNAL_DNS_CONFIG_TBODY_ID = 'dns-view-internal-dns-config-tbody'; |
| |
| DnsView.CLEAR_CACHE_BUTTON_ID = 'dns-view-clear-cache'; |
| DnsView.CAPACITY_SPAN_ID = 'dns-view-cache-capacity'; |
| |
| DnsView.ACTIVE_SPAN_ID = 'dns-view-cache-active'; |
| DnsView.EXPIRED_SPAN_ID = 'dns-view-cache-expired'; |
| DnsView.CACHE_TBODY_ID = 'dns-view-cache-tbody'; |
| |
| cr.addSingletonGetter(DnsView); |
| |
| DnsView.prototype = { |
| // Inherit the superclass's methods. |
| __proto__: superClass.prototype, |
| |
| onLoadLogFinish: function(data) { |
| return this.onHostResolverInfoChanged(data.hostResolverInfo); |
| }, |
| |
| onHostResolverInfoChanged: function(hostResolverInfo) { |
| // Clear the existing values. |
| $(DnsView.DEFAULT_FAMILY_SPAN_ID).innerHTML = ''; |
| $(DnsView.CAPACITY_SPAN_ID).innerHTML = ''; |
| $(DnsView.CACHE_TBODY_ID).innerHTML = ''; |
| $(DnsView.ACTIVE_SPAN_ID).innerHTML = '0'; |
| $(DnsView.EXPIRED_SPAN_ID).innerHTML = '0'; |
| |
| // Update fields containing async DNS configuration information. |
| displayAsyncDnsConfig_(hostResolverInfo); |
| |
| // No info. |
| if (!hostResolverInfo || !hostResolverInfo.cache) |
| return false; |
| |
| var family = hostResolverInfo.default_address_family; |
| addTextNode($(DnsView.DEFAULT_FAMILY_SPAN_ID), |
| addressFamilyToString(family)); |
| |
| var ipv6Disabled = (family == AddressFamily.ADDRESS_FAMILY_IPV4); |
| setNodeDisplay($(DnsView.IPV6_DISABLED_SPAN_ID), ipv6Disabled); |
| |
| // Fill in the basic cache information. |
| var hostResolverCache = hostResolverInfo.cache; |
| $(DnsView.CAPACITY_SPAN_ID).innerText = hostResolverCache.capacity; |
| |
| var expiredEntries = 0; |
| // Date the cache was logged. This will be either now, when actively |
| // logging data, or the date the log dump was created. |
| var logDate; |
| if (MainView.isViewingLoadedLog()) { |
| logDate = new Date(ClientInfo.numericDate); |
| } else { |
| logDate = new Date(); |
| } |
| |
| // Fill in the cache contents table. |
| for (var i = 0; i < hostResolverCache.entries.length; ++i) { |
| var e = hostResolverCache.entries[i]; |
| var tr = addNode($(DnsView.CACHE_TBODY_ID), 'tr'); |
| |
| var hostnameCell = addNode(tr, 'td'); |
| addTextNode(hostnameCell, e.hostname); |
| |
| var familyCell = addNode(tr, 'td'); |
| addTextNode(familyCell, |
| addressFamilyToString(e.address_family)); |
| |
| var addressesCell = addNode(tr, 'td'); |
| |
| if (e.error != undefined) { |
| var errorText = |
| e.error + ' (' + netErrorToString(e.error) + ')'; |
| var errorNode = addTextNode(addressesCell, 'error: ' + errorText); |
| addressesCell.classList.add('warning-text'); |
| } else { |
| addListToNode_(addNode(addressesCell, 'div'), e.addresses); |
| } |
| |
| var expiresDate = timeutil.convertTimeTicksToDate(e.expiration); |
| var expiresCell = addNode(tr, 'td'); |
| timeutil.addNodeWithDate(expiresCell, expiresDate); |
| if (logDate > timeutil.convertTimeTicksToDate(e.expiration)) { |
| ++expiredEntries; |
| var expiredSpan = addNode(expiresCell, 'span'); |
| expiredSpan.classList.add('warning-text'); |
| addTextNode(expiredSpan, ' [Expired]'); |
| } |
| } |
| |
| $(DnsView.ACTIVE_SPAN_ID).innerText = |
| hostResolverCache.entries.length - expiredEntries; |
| $(DnsView.EXPIRED_SPAN_ID).innerText = expiredEntries; |
| return true; |
| }, |
| }; |
| |
| /** |
| * Displays information corresponding to the current async DNS configuration. |
| * @param {Object} hostResolverInfo The host resolver information. |
| */ |
| function displayAsyncDnsConfig_(hostResolverInfo) { |
| // Clear the table. |
| $(DnsView.INTERNAL_DNS_CONFIG_TBODY_ID).innerHTML = ''; |
| |
| // Figure out if the internal DNS resolver is disabled or has no valid |
| // configuration information, and update display accordingly. |
| var enabled = hostResolverInfo && |
| hostResolverInfo.dns_config !== undefined; |
| var noConfig = enabled && |
| hostResolverInfo.dns_config.nameservers === undefined; |
| $(DnsView.INTERNAL_DNS_ENABLED_SPAN_ID).innerText = enabled; |
| setNodeDisplay($(DnsView.INTERNAL_DNS_INVALID_CONFIG_SPAN_ID), noConfig); |
| |
| // If the internal DNS resolver is disabled or has no valid configuration, |
| // we're done. |
| if (!enabled || noConfig) |
| return; |
| |
| var dnsConfig = hostResolverInfo.dns_config; |
| |
| // Display nameservers first. |
| var nameserverRow = addNode($(DnsView.INTERNAL_DNS_CONFIG_TBODY_ID), 'tr'); |
| addNodeWithText(nameserverRow, 'th', 'nameservers'); |
| addListToNode_(addNode(nameserverRow, 'td'), dnsConfig.nameservers); |
| |
| // Add everything else in |dnsConfig| to the table. |
| for (var key in dnsConfig) { |
| if (key == 'nameservers') |
| continue; |
| var tr = addNode($(DnsView.INTERNAL_DNS_CONFIG_TBODY_ID), 'tr'); |
| addNodeWithText(tr, 'th', key); |
| var td = addNode(tr, 'td'); |
| |
| // For lists, display each list entry on a separate line. |
| if (typeof dnsConfig[key] == 'object' && |
| dnsConfig[key].constructor == Array) { |
| addListToNode_(td, dnsConfig[key]); |
| continue; |
| } |
| |
| addTextNode(td, dnsConfig[key]); |
| } |
| } |
| |
| /** |
| * Takes a last of strings and adds them all to a DOM node, displaying them |
| * on separate lines. |
| * @param {DomNode} node The parent node. |
| * @param {Array.<string>} list List of strings to add to the node. |
| */ |
| function addListToNode_(node, list) { |
| for (var i = 0; i < list.length; ++i) |
| addNodeWithText(node, 'div', list[i]); |
| } |
| |
| return DnsView; |
| })(); |