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  • XSS exploit when JavaScript is disabled

    - by snaken
    I'm getting pretty frustrated trying to make McAffee whitelist a supposed exploit on a site i work on. The issue is that their automated system has detected a supposed XSS exploit but the exploit only exists when JavaScript is disabled. Given the fact that you need JavaScript to be disabled for the exploit to exist then surely this means this is not an exploit. Can anyone think of any possible arguments to the contrary? Update - To add more detail: The problem comes from in one place unsanitized URL content is written to an anchor tag href.So, with JS disabled you could have something like this: <a href="foor.php?"><script>alert('foo')</script>#someanchor" .. When JavaScript is enabled this href is updated to be this (on dom ready): <a href="javascript:;">link</a> So, with JS enabled the link is no longer injected, with JS disabled the alert would no longer execute.

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  • What are the Options for Storing Hierarchical Data in a Relational Database?

    - by orangepips
    Good Overviews One more Nested Intervals vs. Adjacency List comparison: the best comparison of Adjacency List, Materialized Path, Nested Set and Nested Interval I've found. Models for hierarchical data: slides with good explanations of tradeoffs and example usage Representing hierarchies in MySQL: very good overview of Nested Set in particular Hierarchical data in RDBMSs: most comprehensive and well organized set of links I've seen, but not much in the way on explanation Options Ones I am aware of and general features: Adjacency List: Columns: ID, ParentID Easy to implement. Cheap node moves, inserts, and deletes. Expensive to find level (can store as a computed column), ancestry & descendants (Bridge Hierarchy combined with level column can solve), path (Lineage Column can solve). Use Common Table Expressions in those databases that support them to traverse. Nested Set (a.k.a Modified Preorder Tree Traversal) First described by Joe Celko - covered in depth in his book Trees and Hierarchies in SQL for Smarties Columns: Left, Right Cheap level, ancestry, descendants Compared to Adjacency List, moves, inserts, deletes more expensive. Requires a specific sort order (e.g. created). So sorting all descendants in a different order requires additional work. Nested Intervals Combination of Nested Sets and Materialized Path where left/right columns are floating point decimals instead of integers and encode the path information. Bridge Table (a.k.a. Closure Table: some good ideas about how to use triggers for maintaining this approach) Columns: ancestor, descendant Stands apart from table it describes. Can include some nodes in more than one hierarchy. Cheap ancestry and descendants (albeit not in what order) For complete knowledge of a hierarchy needs to be combined with another option. Flat Table A modification of the Adjacency List that adds a Level and Rank (e.g. ordering) column to each record. Expensive move and delete Cheap ancestry and descendants Good Use: threaded discussion - forums / blog comments Lineage Column (a.k.a. Materialized Path, Path Enumeration) Column: lineage (e.g. /parent/child/grandchild/etc...) Limit to how deep the hierarchy can be. Descendants cheap (e.g. LEFT(lineage, #) = '/enumerated/path') Ancestry tricky (database specific queries) Database Specific Notes MySQL Use session variables for Adjacency List Oracle Use CONNECT BY to traverse Adjacency Lists PostgreSQL ltree datatype for Materialized Path SQL Server General summary 2008 offers HierarchyId data type appears to help with Lineage Column approach and expand the depth that can be represented.

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  • GWT: Select a TreeItem with right click

    - by Ivan
    I'm capturing a right click event to show a context menu. What I haven't been able to figure out, is how to make the right click actually select the TreeItem, prior to showing of context menu. All help is appreciated. private Tree tree = new Tree() { @Override public void onBrowserEvent(Event event) { if (event.getTypeInt() == Event.ONCONTEXTMENU) { DOM.eventPreventDefault(event); showContextMenu(event); } super.onBrowserEvent(event); } @Override protected void setElement(Element elem) { super.setElement(elem); sinkEvents(Event.ONCONTEXTMENU); } };

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  • [IE 7/8] Loading HTML content in via Javascript nulls my <title> tag in some instances

    - by Simon
    This is an Explorer only problem and the symptoms are: I have links that when clicked will load in HTML chunks (none of which contain html header tags) using javascript. The html chunks are placed in various <div>s around the page, perhaps 3 different places with 3 different chunks brought in via javascript. When these chunks load in the <title> tag of the page gets set to <title></title> for some unknown (to me) reason. I've used the IE developer toolbar to confirm this by inspecting the DOM tree. I have other pages that do similar things but it does not seem to be a problem there.

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  • Any difference between lazy loading Javascript files vs. placing just before </body>

    - by mhr
    Looked around, couldn't find this specific question discussed. Pretty sure the difference is negligible, just curious as to your thoughts. Scenario: All Javascript that doesn't need to be loaded before page render has been placed just before the closing </body> tag. Are there any benefits or detriments to lazy loading these instead through some Javascript code in the head that executes when the DOM load/ready event is fired? Let's say that this only concerns downloading one entire .js file full of functions and not lazy loading several individual files as needed upon usage. Hope that's clear, thanks.

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  • Evaluation of jQuery function variable value during definition of that function

    - by thesnail
    I have a large number of rows in a table within which I wish to attach a unique colorpicker (jQuery plugin) to each cell in a particular column identified by unique ids. Given this, I want to automate the generation of instances of the colorpicker as follows: var myrows={"a","b","c",.....} var mycolours={"ffffff","fcdfcd","123123"...} for (var i=0;i<myrows.length;i++) { $("#"+myrows[i]+"colour").ColorPicker({flat: false, color: mycolours[i], onChange: function (hsb, hex, rgb) { $("#"+myrows[i]+"currentcolour").css('backgroundColor', '#' + hex); } }); Now this doesn't work because the evaluation of the $("#"+myrows[i]+"currentcolour") component occurs at the time the function is called, not when it is defined (which is want I need). Given that this plugin javascript appends its code to the level and not to the underlying DOM component that I am accessing above so can't derive what id this pertains to, how can I evaluate the variable during function declaration/definition? Thanks for any help/insight anyone can give. Brian.

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  • What are the typical reasons Javascript developed on Firefox fails on IE?

    - by karlthorwald
    I developed some javascript enhanced pages that run fine on recent Firefox and Safari. I missed to check in Internet Explorer, and now I find the pages don't work on IE 6 and 7 (so far). The scripts are somehow not executed, the pages show as if javascript wasn't there, although some javascript is executed. I am using own libraries with dom manipulation, from YUI 2 I use YUI-Loader and the XML-Http-Request, and on one page I use "psupload", which depends on JQuery. I am installing Microsoft Script Editor from Office XP and will now debug. I will also write specific tests now. What are the typical failing points of IE? What direction I can keep my eyes open. I found this page, which shows some differences: http://www.quirksmode.org/compatibility.html Can you from your experience name some typical things I should look for first? I will also ask more questions here for specific tasks later, but for now I am interested in your experience why IE usually fails on scripts that run fine in Firefox

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  • functions inside or outside jquery document ready

    - by Hans
    Up until now I just put all my jQuery goodness inside the $(document).ready() function, including simple functions used in certain user interactions. But functions that don´t require the DOM document to be loaded or are only called afterwards anyway, can be placed outside the $(document).ready() as well. Consider for example a very simple validation function such as: function hexvalidate(color) { // Validates 3-digit or 6-digit hex color codes var reg = /^(#)?([0-9a-fA-F]{3})([0-9a-fA-F]{3})?$/; return reg.test(color); } The function is only called from within the $(document).ready() function though. What is best practice (syntax, speed); placing such a function inside or outside the jquery document ready function?

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  • document.getElementById in toString

    - by KooiInc
    edit Found my answers here. Bottom line: toString/valueOf can only return primitive types. So here the lack of native getters in javascript shows, I suppose. I would like to use the following simple function in an elementwrapper: function ElGetter(id){ var id = id; return { set: function(nwid){id = nwid;}, toString: function(){return document.getElementById(id);}, valueOf: function(){return document.getElementById(id);} }; } var myEl = ElGetter('myId'); console.log(myEl.innerHTML); //=> undefined But I can't get it to work. Is it a DOM/javascript restriction or am I missing something? Normally it works, as in: function Tester(){ var x = 1; return { toString: function(){return x}, valueOf: function(){return x} } } var myTest = Tester(); console.log(myTest); //=> 1

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  • IE 8 html parsing error message.

    - by user48408
    I'm experiencing the problem outlined in this kb article. http://support.microsoft.com/kb/927917 . Sorry I can't hyperlink cos i don't have enough points! "This problem occurs because a child container HTML element contains script that tries to modify the parent container element of the child container. The script tries to modify the parent container element by using either the innerHTML method or the appendChild method." The problem I'm having diagnosing the source of my problem is 2 fold: 1) This is only happening on some client machines (All are running IE8) and not others. How/Why only some? 2) I don't have any scripts which modify the innerHTML or call appendChild on any dom elements. I do have server side code which modify properties on asp .net server controls. (Essentially all thats happening is a panel control with some more controls is being made visbile or invisible on a button click), would these in turn then set the innerHTML property of the client rendered control(?)

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  • Is there a better way to serially submit multiple AJAX requests?

    - by friedo
    I have a page with multiple forms that I submit via Ajax POSTs serially. At first, I tried using synchronous XHR requests, but this causes the browser to lock up for the duration of the request, and breaks my DOM-manipulation effects, which is unacceptable. So the pattern I ended up using is basically this: var fcount = 0; // incremented for each form to be submitted function submit_form( num ) { var fdata = { ... }; // data from form # num $.ajax( { async: true, url: '/index.cgi', data: fdata, type: 'POST', success: function() { if ( num < fcount ) { submit_form( ++num ); } } } ); } $( '#submit_form_btn' ).click( function() { submit_form( 1 ) } ); The recursion strikes me as a bit of an ugly solution to what is essentially an iterative problem. Is there a cleaner or more elegant way that this could be handled?

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  • Help porting a bit of Prototype JavaScript to jQuery

    - by ewall
    I have already implemented some AJAX pagination in my Rails app by using the example code for the will_paginate plugin--which is apparently using Prototype. But if I wanted to switch to using jQuery for future additions, I really don't want to have the Prototype stuff sitting around too (yes, I know it's possible). I haven't written a lick of JavaScript in years, let alone looked into Prototype and jQuery... so I could use some help converting this bit into jQuery-compatible syntax: document.observe("dom:loaded", function() { // the element in which we will observe all clicks and capture // ones originating from pagination links var container = $(document.body) if (container) { var img = new Image img.src = '/images/spinner.gif' function createSpinner() { return new Element('img', { src: img.src, 'class': 'spinner' }) } container.observe('click', function(e) { var el = e.element() if (el.match('.pagination a')) { el.up('.pagination').insert(createSpinner()) new Ajax.Request(el.href, { method: 'get' }) e.stop() } }) } }) Thanks in advance!

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  • Problem using AJAX with a Java Applet

    - by diglettpotato
    I currently have a Java Applet which contains a method callfromjs(). Javascript calls this method from the applet so that I don't have to deal with the clunky applet GUI, and then I can create the responses on the DOM easily from javascript. The problem is that the browser hangs while first loading the applet. To get around this, I figured I could use AJAX. The AJAX calls a PHP file which contains callfromjs(). The problem is that the request returns because it's PHP, and it doesn't wait for callfromjs() to retrieve the content. On to my questions: Is there a better way to handle this? If this method seems ok, how can I force the request not to return until the javascript is finished calling the method from the applet?

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  • JSTL XML Transforms not working with nested XSL includes

    - by timxyz
    I have a bit of JSP that does this: <c:import url="/xsl/Transformer.xsl" var="xslt" /> <x:transform doc="${actionBean.dom}" xslt="${xslt}" xsltSystemId="/xsl/"> This transforms the XML exactly as expected so long as Transformer.xsl contains no <xsl:include> tags or so long as any documents it does include do not include anything. However, if I use an XSL which includes a document which in turn includes another document, I get the following error: ERROR: 'Invalid URI 'NestedInclude.xsl Could not resolve entity reference: "NestedInclude.xsl"'.' Note that the JSP is contained in the directory below the xsl documents. If all my XSLs and JSPs are in the same directory (and I remove the xsltSystemId attribute) then everything would work fine, but I don't really want to do this. Can anyone see anything I'm doing wrong, as it's a bit of a killer at the moment and the JSTL documentation is next to useless.

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  • JAVA: Build XML document using XPath expressions

    - by snoe
    I know this isn't really what XPath is for but if I have a HashMap of XPath expressions to values how would I go about building an XML document. I've found dom-4j's DocumentHelper.makeElement(branch, xpath) except it is incapable of creating attributes or indexing. Surely a library exists that can do this? Map xMap = new HashMap(); xMap.put("root/entity/@att", "fooattrib"); xMap.put("root/array[0]/ele/@att", "barattrib"); xMap.put("root/array[0]/ele", "barelement"); xMap.put("root/array[1]/ele", "zoobelement"); would result in: <root> <entity att="fooattrib"/> <array><ele att="barattrib">barelement</ele></array> <array><ele>zoobelement</ele></array> </root>

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  • Convert HTML tag to lowercase

    - by mofle
    I working on an intranet project for IE6 (i know...) and I need to output some HTML code from a div. I use $('#output').text($('#container').html()); But IE6 outputs all the code in uppercase: <TABLE> <TR> <TD>test</TD> </TR> </TABLE> How can I convert HTML tags to lowercase using jQuery? Would be useful to have a plugin that could recursively go trough the DOM-tree.

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  • Using different versions of jQuery on the same page

    - by nimcap
    Users of my service includes a JS in their pages that I provide. I am hosting the script they are including. My script does some manipulation on their content. I am sick of writing my own DOM manipulators/selectors and wasting hours for jobs that can be done with 1 line of code if I can use jQuery. Some of the users of my service already uses jQuery (or Prototype etc.) on their pages, so if I include jQuery there will be a conflict. Because there will be version differences, I don't want to use their jQuery selectors, methods either in case jQuery exists. Keeping in mind that I have no control over their pages, how can I include jQuery and avoid conflict?

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  • Objective-C++ Memory Problem

    - by Stephen Furlani
    Hello, I'm having memory woes. I've got a C++ Library (Equalizer from Eyescale) and they use the Traversal Visitor Pattern to allow you to add new functionality to their classes. I've finally figured out how it works, and I've got a Visitor that just returns the properties from one of the objects. (since I don't know how they're allocated). so. My little code does this: VisitorResult AGLContextVisitor::visit( Channel* channel ) { // Search through Nodes, Pipes until we get to the right window. // Add some code to make sure we find the right one? // Not executing the following code as C++ in gdb? eq::Window* w = channel->getWindow(); OSWindow* osw = w->getOSWindow(); AGLWindow* aw = (AGLWindow *)osw; AGLContext agl_ctx = aw->getAGLContext(); this->setContext(agl_ctx); return TRAVERSE_PRUNE; } So here's the problem. eq::Window* w = channel->getWindow(); (gdb) print w 0x0 BUT If I do this: (gdb) set objc-non-blocking-mode off (gdb) print w=channel->getWindow() 0x300effb9 // an honest memory location, and sets w as verified in the Debugger window of XCode. It does the same thing for osw. I don't get it. Why would something work in (gdb) but not in the code? The file is completely a cpp file, but it seems to be running in objc++, since I need to turn blocking off. Help!? I feel like I'm missing some memory-management basic thing here, either with C++ or Obj-C. [edit] channel-getWindow() is supposed to do this: /** @return the parent window. @version 1.0 */ Window* getWindow() { return _window; } The code also executes fine if I run it from a C++-only application. [edit] No... I tried creating a simple stand-alone program since I was tired of running it as a plugin. Messy to debug. And no, it doesn't run in the C++ program either. So I'm really at a loss as to what I'm doing wrong. Thanks, -- Stephen Furlani

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  • I am looking for an actual functional web browser type control for .NET, maybe a C++ LIBRARY#$??$?

    - by Joshua
    I am trying to emulate a web browser in order to execute JavaScript code and then parse the DOM. The System.Windows.Forms.WebBrowser object does not give me the functionality I need. It let's me set the headers, but you cannot set the proxy or clear cookies. Well you can, but it is not ideal and messes with IE's settings. I've been extending the WebBrowser control pinvoking native windows functions so far, but it is really one hack on top of another. I can mess with the proxy and also clear cookies and such, but this control has its issues as I mentioned. I found something called WebKit .NET (http://webkitdotnet.sourceforge.net/), but I don't see support for setting proxies or cookie manipulation. Can someone recommend a c++/.NET/whatever library to do this: Basically tell me what I need to do to get an interface to similar this in .NET: string FetchBrowserParsedHtml(Uri url, WebProxy p, int timeoutSeconds, byte[] headers, byte[] postdata); void ClearCookies(); I am not responsible for my actions.

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  • performing a javascript event without triggering that event handler

    - by bento
    In my latest code, I have an event handler for a focus on a textarea. When the user clicks on the textarea, that event-handler is triggered which sets some other DOM states based on the selected textarea. However, elsewhere in my program I want to programmatically set the focus of the textarea without triggering that event handler. I know Backbone, for instance, has a way to silently perform an action. My only pseudo-solution is to temporarily set a variable: var silence = true; And then, in my event handler, only perform the logic if silence is false. The handler is still triggered, but the logic doesn't run. Does anyone else know of better strategies for this?

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  • How can I convert German characters during XML read and PHP write into mysql?

    - by kitenski
    Morning, I am inputting data from an XML file into my database, but have any isse with German words (that are in the XML by mistake) For example the word für appears in my XML as für and thus appears the same in my database. I know I could do a simple search/replace for that exact phrase, but I was wondering if there was a smarter way to do it as I can't predict if any other German words may one day appear in the XML? ADDING SOME MORE DETAIL The XML source says: and in my PHP I have $domString = utf8_encode($dom-saveXML($element)); If I look into the XML file before I start reading it, it has - <title> - <![CDATA[ CoPilot Live v8 Europa für Android 8.0.0.644 ]]> </title> Thanks. Greg

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  • In Javascript, by what mechanism does setting an Image src property trigger an image load?

    - by brainjam
    One of the things you learn early on when manipulating a DOM using Javascript is the following pattern: var img = new Image(); // Create new Image object img.onload = function(){ // execute drawImage statements here } img.src = 'myImage.png'; // Set source path As far as I know, in general when you set an object property there are no side effects. So what is the mechanism for triggering an image load? Is it just magic? Or can I use a similar mechanism to implement a class Foo that supports a parallel pattern? var foo = new Foo(); // Create new object foo.barchanged = function(){ // execute something after side effect has completed } foo.bar = 'whatever'; // Assign something to 'bar' property I'm vaguely aware of Javascript getters and setters. Is this how Image.src triggers a load?

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  • jquery iterating through newly created elements

    - by jaeyun
    Hi All, I am trying to add new rows in my table, and save them into DB. First, I use .append() to append rows on the table: $("#tablename").append("<tr id='newRow'><td>newly added row</td></tr>"); The appending function works fine. My page displays the correct result. However, I am unable to select them with $("#newRow").each(function () { alert "it never reaches here!"; }); I am guessing it is because the elements are added after the DOM is loaded. Can anyone please tell me how I can iterate through all my newly added elements? Thank you.

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  • Showing same dfp ads in a single page web application

    - by mivaas19
    I have a single page web application which contains dfp ads. I have two dfp adunits that Iam firing and they are placed in between the content which is a list of articles for a particular category. When I click on another category,it just loads articles for different category(doesnt change the url in address bar) and triggers the same ads. So this is like triggering the ads on the same page. The ads dont show up the second time and this is because you cant use the same adunits on the same page. Since I cannot use the refresh function provided by dfp since my DOM is reconstructed everytime, is there any way I can do this?.

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  • Browser gets blocked, workers to the rescue?

    - by tb_selleo
    Hello, I use JavaScript for rendering 20 tables of 100 rows each. The data for each table is provided by controller as JSON. Each table is split into section that have "totals" and have some other JavaScript logic code. Some totals are outside of the table itself. As a result JavaScript blocks browser for a couple of seconds (especially in IE6) :( I was consideting to use http://code.google.com/p/jsworker/, however Google Gears Workers (I guess workers in general) will not allow me to make changes to DOM at the worker code, and also it seems to me that I can not use jQuery inside jsworker worker code. (Maybe I am wrong here?). This issue seems to be fundamental to the JavaScript coding practice, can you share with me your thoughts how to approach it?

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