main/modules/injector.js

   1 /*
   2  * Copyright 2015 Ketmar Dark <ketmar@ketmar.no-ip.org>
   3  * Portions copyright 2004-2007 Aaron Boodman
   4  * Contributors: See contributors list in install.rdf and CREDITS
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * Note that this license applies only to the Greasemonkey extension source
  14  * files, not to the user scripts which it runs. User scripts are licensed
  15  * separately by their authors.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * The above copyright notice and this permission notice shall be included in all
  26  * copies or substantial portions of the Software.
  27  */
  28 ////////////////////////////////////////////////////////////////////////////////
  29 uses("resource://gre/modules/XPCOMUtils.jsm");
  30
  31 let {closeStorageObjects, createSandbox, runInSandbox} = require("sbapi/sandbox");
  32
  33 const stripCredsRE = new RegExp("(://)([^:/]+)(:[^@/]+)?@");
  34
  35
  36 ////////////////////////////////////////////////////////////////////////////////
  37 let consoleActivated = !addonOptions.openConsole;
  38
  39 function openConsole (win) {
  40   if (consoleActivated) return;
  41   consoleActivated = true;
  42   let inType = "global:console";
  43   let uri = "chrome://global/content/console.xul";
  44   let topWindow = Services.wm.getMostRecentWindow(inType);
  45   if (topWindow) {
  46     //topWindow.focus();
  47   } else {
  48     win.open(uri, "_blank", "chrome,extrachrome,menubar,resizable,scrollbars,status,toolbar");
  49     win.focus();
  50   }
  51 }
  52
  53
  54 ////////////////////////////////////////////////////////////////////////////////
  55 function runScripts (theWin, docStart) {
  56   if (!addonOptions.active) return; // we are inactive
  57   if (!theWin) return;
  58
  59   let theDoc = theWin.document;
  60   if (!theDoc) return; //document not provided, it is undefined likely
  61   if (!theDoc instanceof Ci.nsIDOMHTMLDocument) return; //not html document, so its likely an xul document
  62
  63
  64   // When content does (e.g.) history.replacestate() in an inline script,
  65   // the location.href changes between document-start and document-end time.
  66   // But the content can call replacestate() much later, too.  The only way to
  67   // be consistent is to ignore it.  Luckily, the  document.documentURI does
  68   // _not_ change, so always use it when deciding whether to run scripts.
  69   var url = theWin.document.documentURI;
  70   if (!scacheAPI.isGoodScheme(url)) return;
  71
  72   // ignore user/pass in the URL
  73   url = url.replace(stripCredsRE, "$1");
  74
  75   let sclist = scacheAPI.scriptsForUrl(/*theDoc.location.href*/url, (theWin.frameElement ? true : false), (docStart ? "document-start" : "document-end"));
  76   if (addonOptions.debugMode && sclist !== false) conlog("document-"+(docStart ? "start" : "end")+" for "+url+" ("+(sclist ? sclist.length : 0)+" scripts)");
  77   if (!sclist || sclist.length == 0) return;
  78   if (addonOptions.debugMode) {
  79     let s = "=== "+sclist.length+" scripts found for ["+url+"] ===";
  80     for (let f = 0; f < sclist.length; ++f) s += "\n  #"+f+": '"+sclist[f].name+"'";
  81     conlog(s);
  82   }
  83
  84   // each script is independent (expect unwrapped), so create separate sandboxes
  85   let uwpsbox = false;
  86   for (let nfo of sclist) {
  87     if (nfo.unwrapped) {
  88       // unwrapped script
  89       if (addonOptions.debugMode) {
  90         conlog("["+url+"]: unwrapped script '"+nfo.name+"'");
  91         //scacheAPI.dumpScriptNfo(nfo);
  92       }
  93       if (!uwpsbox) uwpsbox = createSandbox(theWin, nfo, url);
  94       runInSandbox(uwpsbox, nfo);
  95     } else {
  96       // wrapped script
  97       if (addonOptions.debugMode) {
  98         conlog("["+url+"]: wrapped script '"+nfo.name+"'");
  99         //scacheAPI.dumpScriptNfo(nfo);
 100       }
 101       let sbox = createSandbox(theWin, nfo, url);
 102       runInSandbox(sbox, nfo);
 103     }
 104   }
 105 }
 106
 107
 108 ////////////////////////////////////////////////////////////////////////////////
 109 function ContentObserver () {}
 110
 111
 112 ContentObserver.prototype.QueryInterface = XPCOMUtils.generateQI([Ci.nsIObserver]);
 113
 114
 115 ContentObserver.prototype.contentLoad = function (evt) {
 116   var contentWin = evt.target.defaultView;
 117   // now that we've seen any first load event, stop listening for any more
 118   contentWin.removeEventListener("DOMContentLoaded", gContentLoad, true);
 119   contentWin.removeEventListener("load", gContentLoad, true);
 120   //if (addonOptions.debugMode) conlog("document-end for "+contentWin.document.documentURI);
 121   runScripts(contentWin, false);
 122 };
 123
 124
 125 ContentObserver.prototype.observe = function (aSubject, aTopic, aData) {
 126   if (!addonOptions.active) return; // we are inactive
 127   if (aTopic == "document-element-inserted") {
 128     let doc = aSubject;
 129     let win = doc && doc.defaultView;
 130     if (!doc || !win) return;
 131     if (!(doc instanceof Ci.nsIDOMHTMLDocument)) return; //not html document, so its likely an xul document
 132     let url = doc.documentURI;
 133     if (!scacheAPI.isGoodScheme(url)) return;
 134     // listen for whichever kind of load event arrives first
 135     win.addEventListener("DOMContentLoaded", gContentLoad, true);
 136     win.addEventListener("load", gContentLoad, true);
 137     runScripts(win, true);
 138   } else {
 139     logError("observe: "+aTopic);
 140   }
 141 };
 142
 143
 144 ////////////////////////////////////////////////////////////////////////////////
 145 var contentObserver = new ContentObserver(); //WARNING: don't change to `let`!
 146 var gContentLoad = contentObserver.contentLoad.bind(contentObserver); //WARNING: don't change to `let`!
 147
 148
 149 ////////////////////////////////////////////////////////////////////////////////
 150 registerStartupHook("injector", function () {
 151   Services.obs.addObserver(contentObserver, "document-element-inserted", false);
 152   if (!isBootstrapped) openConsole(window);
 153 });
 154
 155
 156 registerShutdownHook("injector", function () {
 157   Services.obs.removeObserver(contentObserver, "document-element-inserted");
 158   closeStorageObjects();
 159 });