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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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• Python - question regarding the concurrent use of `multiprocess`.

  - by orokusaki

  I want to use Python's multiprocessing to do concurrent processing without using locks (locks to me are the opposite of multiprocessing) because I want to build up multiple reports from different resources at the exact same time during a web request (normally takes about 3 seconds but with multiprocessing I can do it in .5 seconds). My problem is that, if I expose such a feature to the web and get 10 users pulling the same report at the same time, I suddenly have 60 interpreters open at the same time (which would crash the system). Is this just the common sense result of using multiprocessing, or is there a trick to get around this potential nightmare? Thanks

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• Determine if on product page programmatically in Magento

  - by dfondente

  I want to insert tracking codes on all of the pages of a Magento site, and need to use a different syntax if the page is a CMS page, a category browsing page, or a product view page. I have a custom module set up with a block that inserts a generic tracking code on each page for now. From within the block, how can I distinguish between CMS pages, category pages, and product pages? I started with: Mage::app()->getRequest(); I can see that Mage::app()->getRequest()->getParam('id'); returns the product or category ID on product and category pages, but doesn't distinguish between those page types. Mage::app()->getRequest()->getRouteName(); return "cms" for CMS pages, but returns "catalog" for both category browsing and product view pages, so I can't use that to tell category and product pages apart. Is there some indicator in the request I can use safely? Or is there a better way to accomplish my goal of different tracking codes for different page types?

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• Strophe javascript prevent disconnection on some delay

  - by patrikas

  Hello, I am developing javascript XMPP application which uses Strophe library to connect to Jabber server. I need to engage the thread for about 5-10 seconds when Strophe connects to the server. Thread is engaged by running java applet and after it releases the thread it goes back to handle XMPP events, however at the moment I cannot manage to do that - trying to use a connection after delay gives me 404 HTTP error (this is sent by XMPP-BOSHS service straight after Strophe sends POST request with XMPP message to it). I was trying to 'pause' a connection with Strophe's connection.pause and then resume it - didn't work. Would sending some raw content to the server, maybe if it's possible telling it that client's gonna be unresponsive for a short time work ? Are there any other solutions ? Thanks

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• IIS7 integrated mode closing token between requests

  - by user607287

  We are migrating to IIS7 integrated mode and have come across an issue. We authenticate using WindowsAuthentication but then store a reference to the WindowsPrincipal so that on future requests we can authorize as needed against AD. In IIS 7 Integrated mode, the token is being closed (between requests) so that when we try to run IsInRole it generates a disposed exception. Is there a way to cache this token or change our use of WindowsPrincipal so that we don't need to make successive AD requests to get it for each authorization request? Here is the exception being thrown from WindowsPrincipal.IsInRole("") - System.ObjectDisposedException: {"Safe handle has been closed"} Thanks.

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• How to Promote iPhone App

  - by Ricibald

  I published my app. I request a review to more than 150 sites but only 8 of them give me a (good) review. I can't reach the most famous blogs because I have to pay to bring on top of their queue. Now, my app seems to be nice but I have only 65 users playing it. This 65 users seems to really like it because I can see there are a lot of games played tracked in my stats. A lot of users say that my app is "fun like Doodle Jump and very addictive". So, what's the problem? Why only 65 people? In a word, how can simple games such "Doodle Jump" or "Flight Control" enter in top 10? What's their secret? What's my mistake? UPDATE: I have a site describing my app.

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• Should I log my website's 404 errors?

  - by Ivan Zlatanov

  I have an ASP.NET website, but this question isn't really about technology, it is rather about practice. Should we log our 404 errors? My reasoning: This is a potential vulnerable point because a simple unfriendly user may fill up your hard drive in no time just by requesting wrong URLs! Some browsers often request resources up front - like for example favicon.ico, even if its not there. This is really annoying. But really I would like to know about a broken link if there exists one in my websites. Should I depend on the URL referrer? The problem with the URL referrer is that I cannot distinguish my internal redirect which may be broken with an unfriendly one from outside. What does the practice suggest?

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• remote_function keeps adding authenticity token on GET requests

  - by jaycode

  Hi, I got the problem similar to this post here: https://rails.lighthouseapp.com/projects/8994/tickets/106-authenticity_token-appears-in-urls-after-ajax-get-request routes.rb map.namespace(:admin, :active_scaffold => true) do |admin| admin.resources :regions, :shallow => true do |region| region.resources :birds, :collection => {:search => :get} end end view <%= javascript_tag %Q( #{remote_function(:update => 'bird_search', :url => search_admin_region_birds_path(@region.id), :method => :get)} ) %> It displays url like: http://localhost:3000/admin/regions/7/birds/search?authenticity_token=F43BcQUM4z3bl7s21kLZQrqwGkuErF7C9jiNMKFTZTo%3D which should be: http://localhost:3000/admin/regions/7/birds/search Without this working my Ajax pagination won't work... help!

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• Get Janrain to work with Sproutcore?

  - by weng

  Since Sproutcore is not dependent on the backend server to render pages, I'm struggling on how to get it working with Janrain. In one of the login processes of Janrain a HTTP request is sent to a backend server that processes the information and render a logged in page to the user. Since I'm using Sproutcore and don't have a backend server but using CouchDB to serve Sproutcore I wonder how I am going to implement Janrain successfully. Even if I'm using a backend server like Node.js I'm still not sure how to implement Janrain. Has anyone implemented Janrain in a Sproutcore app?

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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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• CKEditor and asp.net

  - by TheVillageIdiot

  I am using CKEditor on my page. It is working fine except when I post back. I am getting this error: A potentially dangerous Request.Form value was detected from the client (ctl00$MainContent$txtDesc="<p> &nbsp;</p> I am using this code to put CKEditor value into textbox on OnClientClick event of submit button: function getEditorValue(){ var editor=$("#<%= txtDesc.ClientID%>").ckeditorGet(); editor.updateElement(); return true; }

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• Selectively prevent Session from being created

  - by Jean Barmash

  In my app, I have an external monitor that pings the app ever few minutes and measures its uptime / response time Every time the monitor connects, a new server session is created, so when I look at the number of sessions, it's always a minimum of 15, even during times where there are no actual users. I tried to address this with putting the session creation code into a filter, but that doesn't seem to do it - I guess session automatically gets created when the user opens the first page? all() { before = { if (actionName=='signin') { def session = request.session //creates session if not exists } } } I can configure the monitor to pass in a paramter if I need to (i.e. http://servername.com/?nosession, but not sure how to make sure the session isn't created.

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• Should Marketing departments have basic HTML skills?

  - by Phil.Wheeler

  Working within an organisation as part of the in-house site development team, a lot of my team's throughput is driven by the colouring-in (marketing) department. It is their responsibility to provide approved content and imagery for the features or enhancements that we include on each iteration of the company site. One thing I've noticed in this job and several previous ones is that the Marketing department is extremely particular about wording and presentation, but has little to no understanding of the actual medium with which they're working - the web. I find that my team is constantly making best guesses for various HTML attributes like image alt text, titles, rel tags, blockquote cite attributes and the like. How reasonable is it to expect that marketing departments have a strong understanding of the purpose of HTML metadata? Should it be the developer's job to remind and inform each time or are marketing departments falling behind the technology they're working with? What could I reasonably expect our marketing department to understand and provide every time with each new work request?

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• Application_End() cannot access cache through HttpContext.Current.Cache[key]

  - by Carl J.

  I want to be able to maintain certain objects between application restarts. To do that, I want to write specific cached items out to disk in Global.asax Application_End() function and re-load them back on Application_Start(). I currently have a cache helper class, which uses the following method to return the cached value: return HttpContext.Current.Cache[key]; Problem: during Application_End(), HttpContext.Current is null since there is no web request (it's an automated cleanup procedure) - therefore, I cannot access .Cache[] to retrieve any of the items to save to disk. Question: how can I access the cache items during Application_End()?

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• Can someone exaplain me implicit parameters in Scala?

  - by Oscar Reyes

  And more specifically how does the BigInt works for convert int to BigInt? In the source code it reads: ... implicit def int2bigInt(i: Int): BigInt = apply(i) ... How is this code invoked? I can understand how this other sample: "Date literals" works. In. val christmas = 24 Dec 2010 Defined by: implicit def dateLiterals(date: Int) = new { import java.util.Date def Dec(year: Int) = new Date(year, 11, date) } When int get's passed the message Dec with an int as parameter, the system looks for another method that can handle the request, in this case Dec(year:Int) Q1. Am I right in my understanding of Date literals? Q2. How does it apply to BigInt? Thanks

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• Limit size of cache directory.

  - by M.A. Cape

  I have some questions about the cache directory in android. Does anyone knows the limit for each app's cache directory? Also what will happen if there is not enough disk space to cache data? All I know is when the device runs low on storage, the files here (cache directory)will be the ones that get deleted first and each app has its own cache directory. Now, are the files of other app's cache directory will be cleared to accommodate my app's request to add files in the cache dir when there is not enough storage?

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• How do you access URL text following the # sign through Java?

  - by cmcculloh

  Using Java (.jsp or whatever) is there a way where I can send a request for this page: http://www.mystore.com/store/shelf.jsp?category=mens#page=2 and have the Java code parse the URL and see the #page=2 and respond accordingly? Basically, I'm looking for the Java code that allows me to access the characters following the hash tag. The reason I'm doing this is that I want to load subsequent pages via AJAX (on my shelf) and then allow the user to copy and paste the URL and send it to a friend. Without the ability of Java being able to read the characters following the hash tag I'm uncertain as to how I would manipulate the URL with Javascript in a way that the server would be able to also read without causing the page to re-load. I'm having trouble even figuring out how to access/see the entire URL (http://www.mystore.com/store/shelf.jsp?category=mens#page=2) from within my Java code...

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• Looking to eventually build a smartphone app...

  - by Brian L

  Hi all- I'm a young, inexperienced programmer (I've had a year of Java, some MATLAB, and HTML/CSS in school) but I've decided that to get better, I'm making it my goal to produce a simple smartphone app of some kind this year- probably either webOS or Android since I'm on a PC and can't afford a Mac just to write an iPhone app. So my question is, where do I start? I've read the threads about How to Write for Android and such, but I'm not sure I have enough Java experience to just jump right in. And then there's webOS which is based on JavaScript, correct? I guess I'd just like some input from more experienced folks. I have some Barnes and Noble book credit I'm looking to get rid of too, so if there's a guide you think would be useful, feel free to request. tl;dr: Programming newbie ultimately wants to build a simple smartphone app. Where do I start?

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• How should I port this Prototype to JQuery?

  - by blu

  There is currently this Prototype code that does a PUT: new Ajax.Request(someUrl, { method: 'put', parameters: { 'foo': bar }, onSuccess: function(response) { } .bind(this) }); I found this post but the solution uses an extra parameter supported by RoR, however I am targeting an ASP.NET backend. I searched a bit and found that not all browsers support PUT operations so apparently this could fail in certain browsers? This is already in prod, so a direct port would be fine for now I suppose. As an aside, what is the deal with the bind(this) in the onSuccess function?

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• Django json serialization problem

  - by codingJoe

  I am having difficulty serializing a django object. The problem is that there are foreign keys. I want the serialization to have data from the referenced object, not just the index. For example, I would like the sponsor data field to say "sponsor.last_name, sponsor.first_name" rather than "13". How can I fix my serialization? json data: {"totalCount":"2","activities":[{"pk": 1, "model": "app.activity", "fields": {"activity_date": "2010-12-20", "description": "my activity", "sponsor": 13, "location": 1, .... model code: class Activity(models.Model): activity_date = models.DateField() description = models.CharField(max_length=200) sponsor = models.ForeignKey(Sponsor) location = models.ForeignKey(Location) class Sponsor(models.Model): last_name = models.CharField(max_length=20) first_name= models.CharField(max_length=20) specialty = models.CharField(max_length=100) class Location(models.Model): location_num = models.IntegerField(primary_key=True) location_name = models.CharField(max_length=100) def activityJSON(request): activities = Activity.objects.all() total = activities.count() activities_json = serializers.serialize("json", activities) data = "{\"totalCount\":\"%s\",\"activities\":%s}" % (total, activities_json) return HttpResponse(data, mimetype="application/json")

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• Possible Performance Considerations using Linq to SQL Repositories

  - by Robert Harvey

  I have an ASP.NET MVC application that uses Linq to SQL repositories for all interactions with the database. To deal with data security, I do trimming to filter data to only those items to which the user has access. This occurs in several places: Data in list views Links in a menu bar A treeview on the left hand side containing links to content Role-based security A special security attribute, inheriting from AuthorizeAttribute, that implements content-based authorization on every controller method. Each of these places instantiates a repository, which opens a Linq to Sql DataContext and accesses the database. So, by my count, each request for a page access opens at least six separate Linq to SQL DataContexts. Should I be concerned about this from a performance perspective, and if so, what can be done to mitigate it?

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• How to verify a digital signature with openssl

  - by Aaron Carlino

  I'm using a thirdparty credit card processing service (Paybox) that, after a successful transaction, redirects back to the website with a signature in the URL as a security measure to prevent people from manipulating data. It's supposed to prove that the request originated from this service. So my success URL looks something like this: /success.php?signature=[HUGE HASH] I have no idea where to start with verifying this signature. This service does provide a public key, and I assume I need to create a private key, but I don't know much beyond that. I'm pretty good with linux, and I know I'll have to run some openssl commands. I'm writing the verification script in PHP, which also has native openssl() functions. If anyone could please push me in the right direction with some pseudo code, or even functional code, I'd be very grateful. Thanks.

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• Changing MSSQL Database sorting

  - by plaisthos

  I have a request to change the collation of a MS SQL Database: ALTER DATABASE solarwind95 collate SQL_Latin1_General_CP1_CI_AS but I get this strange error: Meldung 5075, Ebene 16, Status 1, Zeile 1 Das 'Spalte'-Objekt 'CustomPollerAssignment.PollerID' ist von 'Datenbanksortierung' abhängig. Die Datenbanksortierung kann nicht geändert werden, wenn ein schemagebundenes Objekt von ihr abhängig ist. Entfernen Sie die Anhängigkeiten der Datenbanksortierung, und wiederholen Sie den Vorgang. Sorry for the german errror message. I do not know how to switch the language to english, but here is a translation: Translation: Message 5075, Layer 16, Status 1, Row 1 The 'column' object 'CustomPollerAssignment.PollerID' depends on 'Database sorting. The database sorting cannot be changed if a schema bound object depends on it. Remove the dependency of the database sortieren and retry. I got a ton more of the errors like that.

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• Having problem reaching client which don't have static ip address

  - by user317311

  i am making a messenger over internet. it has a server which listens to clients but when it try to send the reply to any request to client it shows the error of client not found. however my clients are connecting to that server because it has a static ip address and live server. having problem reaching client because they can be behind any firewall or network and dont have static ip addresses. so how can i reach to my client?? any Suggestions..

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• compile time if && return string reference optimization

  - by Truncheon

  Hi. I'm writing a series classes that inherit from a base class using virtual. They are INT, FLOAT and STRING objects that I want to use in a scripting language. I'm trying to implement weak typing, but I don't want STRING objects to return copies of themselves when used in the following way (instead I would prefer to have a reference returned which can be used in copying): a = "hello "; b = "world"; c = a + b; I have written the following code as a mock example: #include <iostream> #include <string> #include <cstdio> #include <cstdlib> std::string dummy("<int object cannot return string reference>"); struct BaseImpl { virtual bool is_string() = 0; virtual int get_int() = 0; virtual std::string get_string_copy() = 0; virtual std::string const& get_string_ref() = 0; }; struct INT : BaseImpl { int value; INT(int i = 0) : value(i) { std::cout << "constructor called\n"; } INT(BaseImpl& that) : value(that.get_int()) { std::cout << "copy constructor called\n"; } bool is_string() { return false; } int get_int() { return value; } std::string get_string_copy() { char buf[33]; sprintf(buf, "%i", value); return buf; } std::string const& get_string_ref() { return dummy; } }; struct STRING : BaseImpl { std::string value; STRING(std::string s = "") : value(s) { std::cout << "constructor called\n"; } STRING(BaseImpl& that) { if (that.is_string()) value = that.get_string_ref(); else value = that.get_string_copy(); std::cout << "copy constructor called\n"; } bool is_string() { return true; } int get_int() { return atoi(value.c_str()); } std::string get_string_copy() { return value; } std::string const& get_string_ref() { return value; } }; struct Base { BaseImpl* impl; Base(BaseImpl* p = 0) : impl(p) {} ~Base() { delete impl; } }; int main() { Base b1(new INT(1)); Base b2(new STRING("Hello world")); Base b3(new INT(*b1.impl)); Base b4(new STRING(*b2.impl)); std::cout << "\n"; std::cout << b1.impl->get_int() << "\n"; std::cout << b2.impl->get_int() << "\n"; std::cout << b3.impl->get_int() << "\n"; std::cout << b4.impl->get_int() << "\n"; std::cout << "\n"; std::cout << b1.impl->get_string_ref() << "\n"; std::cout << b2.impl->get_string_ref() << "\n"; std::cout << b3.impl->get_string_ref() << "\n"; std::cout << b4.impl->get_string_ref() << "\n"; std::cout << "\n"; std::cout << b1.impl->get_string_copy() << "\n"; std::cout << b2.impl->get_string_copy() << "\n"; std::cout << b3.impl->get_string_copy() << "\n"; std::cout << b4.impl->get_string_copy() << "\n"; return 0; } It was necessary to add an if check in the STRING class to determine whether its safe to request a reference instead of a copy: Script code: a = "test"; b = a; c = 1; d = "" + c; /* not safe to request reference by standard */ C++ code: STRING(BaseImpl& that) { if (that.is_string()) value = that.get_string_ref(); else value = that.get_string_copy(); std::cout << "copy constructor called\n"; } If was hoping there's a way of moving that if check into compile time, rather than run time.

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