1// Copyright (c) 2010 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5/** 6 * This view displays information on the host resolver: 7 * 8 * - Shows the default address family. 9 * - Has a button to enable IPv6, if it is disabled. 10 * - Shows the current host cache contents. 11 * - Has a button to clear the host cache. 12 * - Shows the parameters used to construct the host cache (capacity, ttl). 13 * 14 * @constructor 15 */ 16function DnsView(mainBoxId, 17 cacheTbodyId, 18 clearCacheButtonId, 19 defaultFamilySpanId, 20 ipv6DisabledSpanId, 21 enableIPv6ButtonId, 22 capacitySpanId, 23 ttlSuccessSpanId, 24 ttlFailureSpanId) { 25 DivView.call(this, mainBoxId); 26 27 // Hook up the UI components. 28 this.cacheTbody_ = document.getElementById(cacheTbodyId); 29 this.defaultFamilySpan_ = document.getElementById(defaultFamilySpanId); 30 this.ipv6DisabledSpan_ = document.getElementById(ipv6DisabledSpanId); 31 32 document.getElementById(enableIPv6ButtonId).onclick = 33 g_browser.enableIPv6.bind(g_browser); 34 35 this.capacitySpan_ = document.getElementById(capacitySpanId); 36 this.ttlSuccessSpan_ = document.getElementById(ttlSuccessSpanId); 37 this.ttlFailureSpan_ = document.getElementById(ttlFailureSpanId); 38 39 var clearCacheButton = document.getElementById(clearCacheButtonId); 40 clearCacheButton.onclick = 41 g_browser.sendClearHostResolverCache.bind(g_browser); 42 43 // Register to receive changes to the host resolver info. 44 g_browser.addHostResolverInfoObserver(this); 45} 46 47inherits(DnsView, DivView); 48 49DnsView.prototype.onHostResolverInfoChanged = function(hostResolverInfo) { 50 // Clear the existing values. 51 this.defaultFamilySpan_.innerHTML = ''; 52 this.capacitySpan_.innerHTML = ''; 53 this.ttlSuccessSpan_.innerHTML = ''; 54 this.ttlFailureSpan_.innerHTML = ''; 55 this.cacheTbody_.innerHTML = ''; 56 57 // No info. 58 if (!hostResolverInfo) 59 return; 60 61 var family = hostResolverInfo.default_address_family; 62 addTextNode(this.defaultFamilySpan_, getKeyWithValue(AddressFamily, family)); 63 64 var ipv6Disabled = (family == AddressFamily.ADDRESS_FAMILY_IPV4); 65 setNodeDisplay(this.ipv6DisabledSpan_, ipv6Disabled); 66 67 // Fill in the basic cache information. 68 var hostResolverCache = hostResolverInfo.cache; 69 addTextNode(this.capacitySpan_, hostResolverCache.capacity); 70 addTextNode(this.ttlSuccessSpan_, hostResolverCache.ttl_success_ms); 71 addTextNode(this.ttlFailureSpan_, hostResolverCache.ttl_failure_ms); 72 73 // Fill in the cache contents table. 74 for (var i = 0; i < hostResolverCache.entries.length; ++i) { 75 var e = hostResolverCache.entries[i]; 76 var tr = addNode(this.cacheTbody_, 'tr'); 77 78 var hostnameCell = addNode(tr, 'td'); 79 addTextNode(hostnameCell, e.hostname); 80 81 var familyCell = addNode(tr, 'td'); 82 addTextNode(familyCell, getKeyWithValue(AddressFamily, e.address_family)); 83 84 var addressesCell = addNode(tr, 'td'); 85 86 if (e.error != undefined) { 87 addTextNode(addressesCell, 'error: ' + e.error); 88 } else { 89 for (var j = 0; j < e.addresses.length; ++j) { 90 var address = e.addresses[j]; 91 if (j != 0) 92 addNode(addressesCell, 'br'); 93 addTextNode(addressesCell, address); 94 } 95 } 96 97 var expiresDate = g_browser.convertTimeTicksToDate(e.expiration); 98 var expiresCell = addNode(tr, 'td'); 99 addTextNode(expiresCell, expiresDate.toLocaleString()); 100 } 101}; 102