browser/modules/ContentLinkHandler.jsm@b8a032363ba2 (annotated)
browser/modules/ContentLinkHandler.jsm
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | "use strict"; |
| michael@0 | 6 | |
| michael@0 | 7 | let Cc = Components.classes; |
| michael@0 | 8 | let Ci = Components.interfaces; |
| michael@0 | 9 | let Cu = Components.utils; |
| michael@0 | 10 | |
| michael@0 | 11 | this.EXPORTED_SYMBOLS = [ "ContentLinkHandler" ]; |
| michael@0 | 12 | |
| michael@0 | 13 | Cu.import("resource://gre/modules/XPCOMUtils.jsm"); |
| michael@0 | 14 | Cu.import("resource://gre/modules/Services.jsm"); |
| michael@0 | 15 | |
| michael@0 | 16 | XPCOMUtils.defineLazyModuleGetter(this, "Feeds", |
| michael@0 | 17 | "resource:///modules/Feeds.jsm"); |
| michael@0 | 18 | XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils", |
| michael@0 | 19 | "resource://gre/modules/BrowserUtils.jsm"); |
| michael@0 | 20 | |
| michael@0 | 21 | this.ContentLinkHandler = { |
| michael@0 | 22 | init: function(chromeGlobal) { |
| michael@0 | 23 | chromeGlobal.addEventListener("DOMLinkAdded", (event) => { |
| michael@0 | 24 | this.onLinkAdded(event, chromeGlobal); |
| michael@0 | 25 | }, false); |
| michael@0 | 26 | }, |
| michael@0 | 27 | |
| michael@0 | 28 | onLinkAdded: function(event, chromeGlobal) { |
| michael@0 | 29 | var link = event.originalTarget; |
| michael@0 | 30 | var rel = link.rel && link.rel.toLowerCase(); |
| michael@0 | 31 | if (!link || !link.ownerDocument || !rel || !link.href) |
| michael@0 | 32 | return; |
| michael@0 | 33 | |
| michael@0 | 34 | // Ignore sub-frames (bugs 305472, 479408). |
| michael@0 | 35 | let window = link.ownerDocument.defaultView; |
| michael@0 | 36 | if (window != window.top) |
| michael@0 | 37 | return; |
| michael@0 | 38 | |
| michael@0 | 39 | var feedAdded = false; |
| michael@0 | 40 | var iconAdded = false; |
| michael@0 | 41 | var searchAdded = false; |
| michael@0 | 42 | var rels = {}; |
| michael@0 | 43 | for (let relString of rel.split(/\s+/)) |
| michael@0 | 44 | rels[relString] = true; |
| michael@0 | 45 | |
| michael@0 | 46 | for (let relVal in rels) { |
| michael@0 | 47 | switch (relVal) { |
| michael@0 | 48 | case "feed": |
| michael@0 | 49 | case "alternate": |
| michael@0 | 50 | if (!feedAdded) { |
| michael@0 | 51 | if (!rels.feed && rels.alternate && rels.stylesheet) |
| michael@0 | 52 | break; |
| michael@0 | 53 | |
| michael@0 | 54 | if (Feeds.isValidFeed(link, link.ownerDocument.nodePrincipal, "feed" in rels)) { |
| michael@0 | 55 | chromeGlobal.sendAsyncMessage("Link:AddFeed", |
| michael@0 | 56 | {type: link.type, |
| michael@0 | 57 | href: link.href, |
| michael@0 | 58 | title: link.title}); |
| michael@0 | 59 | feedAdded = true; |
| michael@0 | 60 | } |
| michael@0 | 61 | } |
| michael@0 | 62 | break; |
| michael@0 | 63 | case "icon": |
| michael@0 | 64 | if (!iconAdded) { |
| michael@0 | 65 | if (!Services.prefs.getBoolPref("browser.chrome.site_icons")) |
| michael@0 | 66 | break; |
| michael@0 | 67 | |
| michael@0 | 68 | var uri = this.getLinkIconURI(link); |
| michael@0 | 69 | if (!uri) |
| michael@0 | 70 | break; |
| michael@0 | 71 | |
| michael@0 | 72 | [iconAdded] = chromeGlobal.sendSyncMessage("Link:AddIcon", {url: uri.spec}); |
| michael@0 | 73 | } |
| michael@0 | 74 | break; |
| michael@0 | 75 | case "search": |
| michael@0 | 76 | if (!searchAdded) { |
| michael@0 | 77 | var type = link.type && link.type.toLowerCase(); |
| michael@0 | 78 | type = type.replace(/^\s+|\s*(?:;.*)?$/g, ""); |
| michael@0 | 79 | |
| michael@0 | 80 | let re = /^(?:https?|ftp):/i; |
| michael@0 | 81 | if (type == "application/opensearchdescription+xml" && link.title && |
| michael@0 | 82 | re.test(link.href)) |
| michael@0 | 83 | { |
| michael@0 | 84 | let engine = { title: link.title, href: link.href }; |
| michael@0 | 85 | chromeGlobal.sendAsyncMessage("Link:AddSearch", |
| michael@0 | 86 | {engine: engine, |
| michael@0 | 87 | url: link.ownerDocument.documentURI}); |
| michael@0 | 88 | searchAdded = true; |
| michael@0 | 89 | } |
| michael@0 | 90 | } |
| michael@0 | 91 | break; |
| michael@0 | 92 | } |
| michael@0 | 93 | } |
| michael@0 | 94 | }, |
| michael@0 | 95 | |
| michael@0 | 96 | getLinkIconURI: function(aLink) { |
| michael@0 | 97 | let targetDoc = aLink.ownerDocument; |
| michael@0 | 98 | var uri = BrowserUtils.makeURI(aLink.href, targetDoc.characterSet); |
| michael@0 | 99 | |
| michael@0 | 100 | // Verify that the load of this icon is legal. |
| michael@0 | 101 | // Some error or special pages can load their favicon. |
| michael@0 | 102 | // To be on the safe side, only allow chrome:// favicons. |
| michael@0 | 103 | var isAllowedPage = [ |
| michael@0 | 104 | /^about:neterror\?/, |
| michael@0 | 105 | /^about:blocked\?/, |
| michael@0 | 106 | /^about:certerror\?/, |
| michael@0 | 107 | /^about:home$/, |
| michael@0 | 108 | ].some(function (re) re.test(targetDoc.documentURI)); |
| michael@0 | 109 | |
| michael@0 | 110 | if (!isAllowedPage || !uri.schemeIs("chrome")) { |
| michael@0 | 111 | var ssm = Services.scriptSecurityManager; |
| michael@0 | 112 | try { |
| michael@0 | 113 | ssm.checkLoadURIWithPrincipal(targetDoc.nodePrincipal, uri, |
| michael@0 | 114 | Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT); |
| michael@0 | 115 | } catch(e) { |
| michael@0 | 116 | return null; |
| michael@0 | 117 | } |
| michael@0 | 118 | } |
| michael@0 | 119 | |
| michael@0 | 120 | try { |
| michael@0 | 121 | var contentPolicy = Cc["@mozilla.org/layout/content-policy;1"]. |
| michael@0 | 122 | getService(Ci.nsIContentPolicy); |
| michael@0 | 123 | } catch(e) { |
| michael@0 | 124 | return null; // Refuse to load if we can't do a security check. |
| michael@0 | 125 | } |
| michael@0 | 126 | |
| michael@0 | 127 | // Security says okay, now ask content policy |
| michael@0 | 128 | if (contentPolicy.shouldLoad(Ci.nsIContentPolicy.TYPE_IMAGE, |
| michael@0 | 129 | uri, targetDoc.documentURIObject, |
| michael@0 | 130 | aLink, aLink.type, null) |
| michael@0 | 131 | != Ci.nsIContentPolicy.ACCEPT) |
| michael@0 | 132 | return null; |
| michael@0 | 133 | |
| michael@0 | 134 | try { |
| michael@0 | 135 | uri.userPass = ""; |
| michael@0 | 136 | } catch(e) { |
| michael@0 | 137 | // some URIs are immutable |
| michael@0 | 138 | } |
| michael@0 | 139 | return uri; |
| michael@0 | 140 | }, |
| michael@0 | 141 | }; |
