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wombat: add generic setAttribute override for href and src, Image object

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override, src prop rewrite
This commit is contained in:
Ilya Kreymer 2014-11-02 16:09:56 -08:00
parent 09e461c58c
commit ced94d289d
1 changed files with 74 additions and 28 deletions
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102
pywb/static/wombat.js
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@ -18,7 +18,7 @@ This file is part of pywb, https://github.com/ikreymer/pywb
*/
//============================================
// Wombat JS-Rewriting Library v2.0
// Wombat JS-Rewriting Library v2.1
//============================================
window._WBWombat = (function() {
@ -386,10 +386,10 @@ window._WBWombat = (function() {
// String has been assigned to location, so assign it
if (locType == "string") {
update_location(wombat_loc, actual_location.href, actual_location);
} else if (locType == "object") {
update_location(wombat_loc.href,
wombat_loc._orig_href,
wombat_loc._orig_href,
actual_location);
}
}
@ -484,6 +484,42 @@ window._WBWombat = (function() {
window.XMLHttpRequest.prototype.open = open_rewritten;
}
//============================================
function init_setAttribute_override()
{
if (!window.Element ||
!window.Element.prototype ||
!window.Element.prototype.setAttribute) {
return;
}
var orig_setAttribute = window.Element.prototype.setAttribute;
Element.prototype.setAttribute = function(name, value) {
if (name) {
var lowername = name.toLowerCase();
if (lowername == "src" || lowername == "href") {
if (!this._no_rewrite) {
value = rewrite_url(value);
}
}
}
orig_setAttribute.call(this, name, value);
};
}
//============================================
function init_image_override() {
window.Image = function (Image) {
return function (width, height) {
var image = new Image(width, height);
override_attr(image, "src");
return image;
}
}(Image);
}
//============================================
function init_worker_override() {
if (!window.Worker) {
@ -511,8 +547,11 @@ window._WBWombat = (function() {
return;
}
value = func(value);
if (func) {
value = func(value);
}
// this now handles the actual rewrite
elem.setAttribute(name, value);
}
@ -533,8 +572,8 @@ window._WBWombat = (function() {
//============================================
function rewrite_elem(elem)
{
rewrite_attr(elem, "src", rewrite_url);
rewrite_attr(elem, "href", rewrite_url);
rewrite_attr(elem, "src");
rewrite_attr(elem, "href");
rewrite_attr(elem, "style", rewrite_style);
if (elem && elem.getAttribute && elem.getAttribute("crossorigin")) {
@ -542,30 +581,31 @@ window._WBWombat = (function() {
}
}
//============================================
function override_attr(obj, attr) {
var setter = function(orig) {
//var val = rewrite_url(orig);
var val = orig;
this.setAttribute(attr, val);
return val;
}
var getter = function(val) {
var res = this.getAttribute(attr);
return res;
}
var curr_src = obj.getAttribute(attr);
def_prop(obj, attr, curr_src, setter, getter);
}
//============================================
function init_dom_override() {
if (!Node || !Node.prototype) {
return;
}
function override_attr(obj, attr) {
var setter = function(orig) {
var val = rewrite_url(orig);
//console.log(orig + " -> " + val);
this.setAttribute(attr, val);
return val;
}
var getter = function(val) {
var res = this.getAttribute(attr);
return res;
}
var curr_src = obj.getAttribute(attr);
def_prop(obj, attr, curr_src, setter, getter);
}
function replace_dom_func(funcname) {
var orig = Node.prototype[funcname];
@ -595,9 +635,10 @@ window._WBWombat = (function() {
created.contentWindow.window.WB_wombat_location = created.contentWindow.window.location;
}
override_attr(created, "src");
} else if (created.tagName == "IMG") {
override_attr(created, "src");
}
// } else if (created.tagName == "A") {
// override_attr(created, "href");
// }
@ -611,8 +652,6 @@ window._WBWombat = (function() {
replace_dom_func("replaceChild");
}
var postmessage_rewritten;
//============================================
function init_postmessage_override()
{
@ -622,7 +661,7 @@ window._WBWombat = (function() {
var orig = Window.prototype.postMessage;
postmessage_rewritten = function(message, targetOrigin, transfer) {
var postmessage_rewritten = function(message, targetOrigin, transfer) {
if (targetOrigin && targetOrigin != "*") {
targetOrigin = window.location.origin;
}
@ -668,6 +707,7 @@ window._WBWombat = (function() {
}
}
//============================================
function init_cookies_override()
{
var cookie_path_regex = /\bPath=\'?\"?([^;'"\s]+)/i;
@ -804,6 +844,12 @@ window._WBWombat = (function() {
init_ajax_rewrite();
init_worker_override();
// setAttribute
init_setAttribute_override();
// Image
init_image_override();
// Cookies
init_cookies_override();