The Tor Browser / file comparison
comparison: browser/modules/ContentLinkHandler.jsm
browser/modules/ContentLinkHandler.jsm
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| -1:000000000000 | 0:505292b4cd18 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 "use strict"; | |
| 6 | |
| 7 let Cc = Components.classes; | |
| 8 let Ci = Components.interfaces; | |
| 9 let Cu = Components.utils; | |
| 10 | |
| 11 this.EXPORTED_SYMBOLS = [ "ContentLinkHandler" ]; | |
| 12 | |
| 13 Cu.import("resource://gre/modules/XPCOMUtils.jsm"); | |
| 14 Cu.import("resource://gre/modules/Services.jsm"); | |
| 15 | |
| 16 XPCOMUtils.defineLazyModuleGetter(this, "Feeds", | |
| 17 "resource:///modules/Feeds.jsm"); | |
| 18 XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils", | |
| 19 "resource://gre/modules/BrowserUtils.jsm"); | |
| 20 | |
| 21 this.ContentLinkHandler = { | |
| 22 init: function(chromeGlobal) { | |
| 23 chromeGlobal.addEventListener("DOMLinkAdded", (event) => { | |
| 24 this.onLinkAdded(event, chromeGlobal); | |
| 25 }, false); | |
| 26 }, | |
| 27 | |
| 28 onLinkAdded: function(event, chromeGlobal) { | |
| 29 var link = event.originalTarget; | |
| 30 var rel = link.rel && link.rel.toLowerCase(); | |
| 31 if (!link || !link.ownerDocument || !rel || !link.href) | |
| 32 return; | |
| 33 | |
| 34 // Ignore sub-frames (bugs 305472, 479408). | |
| 35 let window = link.ownerDocument.defaultView; | |
| 36 if (window != window.top) | |
| 37 return; | |
| 38 | |
| 39 var feedAdded = false; | |
| 40 var iconAdded = false; | |
| 41 var searchAdded = false; | |
| 42 var rels = {}; | |
| 43 for (let relString of rel.split(/\s+/)) | |
| 44 rels[relString] = true; | |
| 45 | |
| 46 for (let relVal in rels) { | |
| 47 switch (relVal) { | |
| 48 case "feed": | |
| 49 case "alternate": | |
| 50 if (!feedAdded) { | |
| 51 if (!rels.feed && rels.alternate && rels.stylesheet) | |
| 52 break; | |
| 53 | |
| 54 if (Feeds.isValidFeed(link, link.ownerDocument.nodePrincipal, "feed" in rels)) { | |
| 55 chromeGlobal.sendAsyncMessage("Link:AddFeed", | |
| 56 {type: link.type, | |
| 57 href: link.href, | |
| 58 title: link.title}); | |
| 59 feedAdded = true; | |
| 60 } | |
| 61 } | |
| 62 break; | |
| 63 case "icon": | |
| 64 if (!iconAdded) { | |
| 65 if (!Services.prefs.getBoolPref("browser.chrome.site_icons")) | |
| 66 break; | |
| 67 | |
| 68 var uri = this.getLinkIconURI(link); | |
| 69 if (!uri) | |
| 70 break; | |
| 71 | |
| 72 [iconAdded] = chromeGlobal.sendSyncMessage("Link:AddIcon", {url: uri.spec}); | |
| 73 } | |
| 74 break; | |
| 75 case "search": | |
| 76 if (!searchAdded) { | |
| 77 var type = link.type && link.type.toLowerCase(); | |
| 78 type = type.replace(/^\s+|\s*(?:;.*)?$/g, ""); | |
| 79 | |
| 80 let re = /^(?:https?|ftp):/i; | |
| 81 if (type == "application/opensearchdescription+xml" && link.title && | |
| 82 re.test(link.href)) | |
| 83 { | |
| 84 let engine = { title: link.title, href: link.href }; | |
| 85 chromeGlobal.sendAsyncMessage("Link:AddSearch", | |
| 86 {engine: engine, | |
| 87 url: link.ownerDocument.documentURI}); | |
| 88 searchAdded = true; | |
| 89 } | |
| 90 } | |
| 91 break; | |
| 92 } | |
| 93 } | |
| 94 }, | |
| 95 | |
| 96 getLinkIconURI: function(aLink) { | |
| 97 let targetDoc = aLink.ownerDocument; | |
| 98 var uri = BrowserUtils.makeURI(aLink.href, targetDoc.characterSet); | |
| 99 | |
| 100 // Verify that the load of this icon is legal. | |
| 101 // Some error or special pages can load their favicon. | |
| 102 // To be on the safe side, only allow chrome:// favicons. | |
| 103 var isAllowedPage = [ | |
| 104 /^about:neterror\?/, | |
| 105 /^about:blocked\?/, | |
| 106 /^about:certerror\?/, | |
| 107 /^about:home$/, | |
| 108 ].some(function (re) re.test(targetDoc.documentURI)); | |
| 109 | |
| 110 if (!isAllowedPage || !uri.schemeIs("chrome")) { | |
| 111 var ssm = Services.scriptSecurityManager; | |
| 112 try { | |
| 113 ssm.checkLoadURIWithPrincipal(targetDoc.nodePrincipal, uri, | |
| 114 Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT); | |
| 115 } catch(e) { | |
| 116 return null; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 try { | |
| 121 var contentPolicy = Cc["@mozilla.org/layout/content-policy;1"]. | |
| 122 getService(Ci.nsIContentPolicy); | |
| 123 } catch(e) { | |
| 124 return null; // Refuse to load if we can't do a security check. | |
| 125 } | |
| 126 | |
| 127 // Security says okay, now ask content policy | |
| 128 if (contentPolicy.shouldLoad(Ci.nsIContentPolicy.TYPE_IMAGE, | |
| 129 uri, targetDoc.documentURIObject, | |
| 130 aLink, aLink.type, null) | |
| 131 != Ci.nsIContentPolicy.ACCEPT) | |
| 132 return null; | |
| 133 | |
| 134 try { | |
| 135 uri.userPass = ""; | |
| 136 } catch(e) { | |
| 137 // some URIs are immutable | |
| 138 } | |
| 139 return uri; | |
| 140 }, | |
| 141 }; |
