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  • Les Google Apps s'enrichissent avec la reconnaissance de caractères et des capacités de stockage supplémentaires

    Les Google Apps s'enrichissent avec la reconnaissance de caractères Et proposent des capacités de stockage supplémentaires Les Google Apps, la suite de productivité 100 % Cloud de Google, viennent de s'enrichir coup sur coup de deux nouvelles fonctionnalités. La première permet de convertir automatiquement des documents PDF en texte grâce à une technologie de reconnaissance de caractères (dite OCR pour Optical Character Recognition). [IMG]http://ftp-developpez.com/gordon-fowler/Google%20Apps%20Improvments/ocr1.png[/IMG] Cette fonctionnalité existait déjà en test pour la langue français...

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  • Chrome Apps Office Hours: TextDrive and AngularJS

    Chrome Apps Office Hours: TextDrive and AngularJS Ask and vote for questions: goo.gl In this episode, the AngularJS team joins us to talk about how they used Angular to build TextDrive. TextDrive is an open source text editor application that demonstrates of the power and simplicity of AngularJS and Chrome Apps. It features integration with Google Drive, web intents, and Ace (ace.ajax.org) in a simple and clean interface built upon HTML5 and web standards. To learn more visit github.com From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • Is there a Distributed SAN/Storage System out there?

    - by Joel Coel
    Like many other places, we ask our users not to save files to their local machines. Instead, we encourage that they be put on a file server so that others (with appropriate permissions) can use them and that the files are backed up properly. The result of this is that most users have large hard drives that are sitting mainly empty. It's 2010 now. Surely there is a system out there that lets you turn that empty space into a virtual SAN or document library? What I envision is a client program that is pushed out to users' PCs that coordinates with a central server. The server looks to users just like a normal file server, but instead of keeping entire file contents it merely keeps a record of where those files can be found among various user PCs. It then coordinates with the right clients to serve up file requests. The client software would be able to respond to such requests directly, as well as be smart enough to cache recent files locally. For redundancy the server could make sure files are copied to multiple PCs, perhaps allowing you to define groups in different locations so that an instance of the entire repository lives in each group to protect against a disaster in one building taking down everything else. Obviously you wouldn't point your database server here, but for simpler things I see several advantages: Files can often be transferred from a nearer machine. Disk space grows automatically as your company does. Should ultimately be cheaper, as you don't need to keep a separate set of disks I can see a few downsides as well: Occasional degradation of user pc performance, if the machine has to serve or accept a large file transfer during a busy period. Writes have to be propogated around the network several times (though I suspect this isn't really much of a problem, as reading happens in most places more than writing) Still need a way to send a complete copy of the data offsite occasionally, and this would make it very hard to do differentials Think of this like a cloud storage system that lives entirely within your corporate LAN and makes use of your existing user equipment. Our old main file server is due for retirement in about 2 years, and I'm looking into replacing it with a small SAN. I'm thinking something like this would be a better fit. As a school, we have a couple computer labs I can leave running that would be perfect for adding a little extra redundancy to the system. Unfortunately, the closest thing I can find is Dienst, and it's just a paper that dates back to 1994. Am I just using the wrong buzzwords in my searches, or does this really not exist? If not, is there a big downside that I'm missing?

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  • Apps Script Office Hours - December 6, 2012

    Apps Script Office Hours - December 6, 2012 In this episode Eric ... - Talks about a recent blog post covering the UK Cabinet's use of Apps Script to generate Google Analytics reports. - Mentions the recent episode on triggers and the upcoming episodes covering Twillio integration and Charts Dashboards. - Answers various questions about using ScriptDb, including the storing of functions and linked objects. You can see the list of upcoming episodes here: developers.google.com From: GoogleDevelopers Views: 19 3 ratings Time: 17:23 More in Science & Technology

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  • Domain transfer from Yahoo to Godaddy. Google apps downtime

    - by Kedar
    I am moving my domain from Yahoo to Godaddy (cause yahoo charges ridiculously hugh amounts than others). My problem is I use this domain for Google apps and one of those is my custom email. So here are a few questions that I have - 1) Godaddy told me there is going to be a 48 hours of downtime. Is there anything that I can do to minimize the downtime? 2) Will I lose all the email that I get during this downtime? or they be stored in the cloud and bulk emailed me once my domain is up with Godaddy? If they are lost is there any workaround to forward them to my gmail during the downtime (i know sounds stupid, but I have to ask). Any help is much appreciated. Thanks in advance.

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  • iTunes want to remove my existing apps on iPad

    - by Pablo
    Here is the situation. I connected my iPad to some new PC, Synced, then ticking Sync Apps from Devices-Apps will give me warning that all existing apps on my iPad will be replaced with those from Library-Apps. But in Library I have just couple old apps, which long time ago I used. So how I can sync the library in iTunes with my existing apps from iPad? EDIT: I have tried to click on Transfer Purchases, but not all of the items went to the library, just few of them.

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  • iTunes want to remove my existing apps on iPad

    - by Michael
    Here is the situation. I connected my iPad to some new PC, Synced, then ticking Sync Apps from Devices-Apps will give me warning that all existing apps on my iPad will be replaced with those from Library-Apps. But in Library I have just couple old apps, which long time ago I used. So how I can sync the library in iTunes with my existing apps from iPad? EDIT: I have tried to click on Transfer Purchases, but not all of the items went to the library, just few of them.

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  • How can I migrate mails from Yahoo! Mail to Google Apps?

    - by alnorth29
    We'd like to move from using Yahoo! Mail to our Google Apps account. It'd be great to be able to migrate all the mails across from the old accounts to the new. If we were using Gmail accounts this would be easy as the migration is offered by Google, for some reason they don't offer this to those using custom domains. As far as I know Yahoo! don't offer POP or IMAP access to non-paying customers and I'd rather not pay $20 per account that I want to migrate. Anyone know of any easy and cheap solutions?

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  • Move email off Small Business Server to Google Apps, retain other SBS functions?

    - by Paul S.
    Recently, an in-house Microsoft Small Business Server 2011 was installed where I work. Unfortunately, our buildings have a bad electrical power supply and we suffer frequent outages. We have a large percentage of staff working off-site. Now when the power goes off here, everyone everywhere loses email functionality. I have been assigned to research the possibility of routing our email to Google Apps while maintaining LAN functions on the SBS. I haven't worked with Microsoft products for several years now, so do not know how SBS is structured. Can anyone here tell me if this is possible, or point me to good resources that explain our options?

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  • Great Free Courses on Building HTML5 apps using ASP.NET Web API, Knockout.js and jQuery

    - by ScottGu
    Pluralsight has developed some great training courses on the new .NET 4.5 and VS 2012 release, including two fantastic courses from John Papa that cover how to build HTML5 web apps using ASP.NET Web API, Knockout and jQuery: Single Page Apps with HTML5, Web API, Knockout and jQuery Building HTML5 and JavaScript Apps with MVVM and Knockout Free 1-Month Subscription to the Courses Pluralsight is offering a special promotion that allows you to get a free 1-month subscription to watch the above courses at no cost.  There is no obligation to buy anything at the end of the offer and you don’t need to supply a credit card in order to take part in it. To get access to the course you simply follow @pluralsight and @john_papa on Twitter and then visit this page and enter your Twitter name using the form on it.  Pluralsight will then send you a private twitter message containing the access code that you can use to subscribe to the courses (and download the course exercise files).  Once you are subscribed to the course you have one month to watch the course (and you can watch it as many times as you want during the month). Pluralsight is running the promotion through Sept 18th – so sign-up now to get access.  Once you are signed up you then have a month to watch the course. Hope this helps, Scott P.S. And if you are new to Twitter you can also optionally follow me: @scottgu

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  • BUILD 2013 Session&ndash;Testing Your C# Base Windows Store Apps

    - by Tim Murphy
    Originally posted on: http://geekswithblogs.net/tmurphy/archive/2013/06/27/build-2013-sessionndashtesting-your-c-base-windows-store-apps.aspx Testing an application is not what most people consider fun and the number of situation that need to be tested seems to grow exponentially when building mobile apps.  That is why I found the topic of this session interesting.  When I found out that the speaker, Francis Cheung, was from the Patterns and Practices group I knew I was in the right place.  I have admired that team since I first met Ron Jacobs around 2001.  So what did Francis have to offer? He started off in a rather confusing who’s on first fashion.  It seems that one of his tester was originally supposed to give the talk, but then it was decided that it would be better to have someone who does development present a testing topic.  This didn’t hinder the content of the talk in the least.  He broke the process down in a logical manner that would be straight forward to understand if not implement. Francis hit the main areas we usually think of such as tombstoning, network connectivity and asynchronous code, but he approached them with tools they we may not have thought of until now.  He relied heavily on Fiddler to intercept and change the behavior of network requests. Then there are the areas you might not normal think to check.  This includes localization, accessibility and updating client code to a new version.  These are important aspects of your app that can severely impact how customers feel about your app.  Take the time to view this session and get a new appreciation for testing and where it fits in your development lifecycle. del.icio.us Tags: BUILD 2013,Testing,C#,Windows Store Apps,Fiddler

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  • Technology stack for CRUD apps [closed]

    - by Panoy
    In the past years, I have been using VB6 + MySQL when developing CRUD applications. Now I am currently learning how to develop web applications, as my plan is to go through the "browser/web app" path every time I build a CRUD app. I'm leaning on Ruby on Rails + MySQL/PostgreSQL/any NoSQL database now. I would like to know what other technology/tools stack to include in my architecture when developing these web apps? I'm asking your inputs with regards to the UI, database and reporting stack/toolset. Currently I have these in mind: UI = jQuery, jQueryUI (add your comments for other good UI stack) database = will be considering NoSQL or simply but RDBMS reporting tool = i'm clueless here Will it also make sense to use NoSQL database on these CRUD applications? I am assuming that the data would balloon later on. The desktop/native app route is an option only if there is a requirement, that in my limited experience, believes that a web app can't solve. Like for example those imaging apps/document forms and point-of-sale systems. I believe that web apps are gaining ground now and I find it most fun and intriguing to play and experiment with them. Please share your suggestions!

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  • Building apps that work Together

    - by Tim Murphy
    Originally posted on: http://geekswithblogs.net/tmurphy/archive/2013/07/03/building-apps-that-work-together.aspx  Writing apps that stand alone will only get yon so far.  If your app can allow the user to leverage other applications and share data you Can have a real winner on your hands. Jake Sabulsky started off by explaining that you should be concentrating on the core functionality of your app and letting the framework take care of the features that users require these days.  This is implemented be leveraging contracts.  When Windows 8 was released it included the File, Share and Pickers contracts.  With the release of Windows 8.1 they have added the Contacts and Calendar contracts. There have been a number of improvements to the original contracts. The File URI contract will now automatically detect the size that a new windows should be opened and will also allow you to programmatically influence new window size.  The Share contract has been enhanced by allowing apps to always share screenshots and links to the app in the store. To my thinking the contracts are one of the most powerful features of Windows 8.  Take the time view this session and learn how to leverage them. Technorati Tags: BUILD 2013,Windows 8,Live tiles

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  • Security Issues with Single Page Apps

    - by Stephen.Walther
    Last week, I was asked to do a code review of a Single Page App built using the ASP.NET Web API, Durandal, and Knockout (good stuff!). In particular, I was asked to investigate whether there any special security issues associated with building a Single Page App which are not present in the case of a traditional server-side ASP.NET application. In this blog entry, I discuss two areas in which you need to exercise extra caution when building a Single Page App. I discuss how Single Page Apps are extra vulnerable to both Cross-Site Scripting (XSS) attacks and Cross-Site Request Forgery (CSRF) attacks. This goal of this blog post is NOT to persuade you to avoid writing Single Page Apps. I’m a big fan of Single Page Apps. Instead, the goal is to ensure that you are fully aware of some of the security issues related to Single Page Apps and ensure that you know how to guard against them. Cross-Site Scripting (XSS) Attacks According to WhiteHat Security, over 65% of public websites are open to XSS attacks. That’s bad. By taking advantage of XSS holes in a website, a hacker can steal your credit cards, passwords, or bank account information. Any website that redisplays untrusted information is open to XSS attacks. Let me give you a simple example. Imagine that you want to display the name of the current user on a page. To do this, you create the following server-side ASP.NET page located at http://MajorBank.com/SomePage.aspx: <%@Page Language="C#" %> <html> <head> <title>Some Page</title> </head> <body> Welcome <%= Request["username"] %> </body> </html> Nothing fancy here. Notice that the page displays the current username by using Request[“username”]. Using Request[“username”] displays the username regardless of whether the username is present in a cookie, a form field, or a query string variable. Unfortunately, by using Request[“username”] to redisplay untrusted information, you have now opened your website to XSS attacks. Here’s how. Imagine that an evil hacker creates the following link on another website (hackers.com): <a href="/SomePage.aspx?username=<script src=Evil.js></script>">Visit MajorBank</a> Notice that the link includes a query string variable named username and the value of the username variable is an HTML <SCRIPT> tag which points to a JavaScript file named Evil.js. When anyone clicks on the link, the <SCRIPT> tag will be injected into SomePage.aspx and the Evil.js script will be loaded and executed. What can a hacker do in the Evil.js script? Anything the hacker wants. For example, the hacker could display a popup dialog on the MajorBank.com site which asks the user to enter their password. The script could then post the password back to hackers.com and now the evil hacker has your secret password. ASP.NET Web Forms and ASP.NET MVC have two automatic safeguards against this type of attack: Request Validation and Automatic HTML Encoding. Protecting Coming In (Request Validation) In a server-side ASP.NET app, you are protected against the XSS attack described above by a feature named Request Validation. If you attempt to submit “potentially dangerous” content — such as a JavaScript <SCRIPT> tag — in a form field or query string variable then you get an exception. Unfortunately, Request Validation only applies to server-side apps. Request Validation does not help in the case of a Single Page App. In particular, the ASP.NET Web API does not pay attention to Request Validation. You can post any content you want – including <SCRIPT> tags – to an ASP.NET Web API action. For example, the following HTML page contains a form. When you submit the form, the form data is submitted to an ASP.NET Web API controller on the server using an Ajax request: <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> </head> <body> <form data-bind="submit:submit"> <div> <label> User Name: <input data-bind="value:user.userName" /> </label> </div> <div> <label> Email: <input data-bind="value:user.email" /> </label> </div> <div> <input type="submit" value="Submit" /> </div> </form> <script src="Scripts/jquery-1.7.1.js"></script> <script src="Scripts/knockout-2.1.0.js"></script> <script> var viewModel = { user: { userName: ko.observable(), email: ko.observable() }, submit: function () { $.post("/api/users", ko.toJS(this.user)); } }; ko.applyBindings(viewModel); </script> </body> </html> The form above is using Knockout to bind the form fields to a view model. When you submit the form, the view model is submitted to an ASP.NET Web API action on the server. Here’s the server-side ASP.NET Web API controller and model class: public class UsersController : ApiController { public HttpResponseMessage Post(UserViewModel user) { var userName = user.UserName; return Request.CreateResponse(HttpStatusCode.OK); } } public class UserViewModel { public string UserName { get; set; } public string Email { get; set; } } If you submit the HTML form, you don’t get an error. The “potentially dangerous” content is passed to the server without any exception being thrown. In the screenshot below, you can see that I was able to post a username form field with the value “<script>alert(‘boo’)</script”. So what this means is that you do not get automatic Request Validation in the case of a Single Page App. You need to be extra careful in a Single Page App about ensuring that you do not display untrusted content because you don’t have the Request Validation safety net which you have in a traditional server-side ASP.NET app. Protecting Going Out (Automatic HTML Encoding) Server-side ASP.NET also protects you from XSS attacks when you render content. By default, all content rendered by the razor view engine is HTML encoded. For example, the following razor view displays the text “<b>Hello!</b>” instead of the text “Hello!” in bold: @{ var message = "<b>Hello!</b>"; } @message   If you don’t want to render content as HTML encoded in razor then you need to take the extra step of using the @Html.Raw() helper. In a Web Form page, if you use <%: %> instead of <%= %> then you get automatic HTML Encoding: <%@ Page Language="C#" %> <% var message = "<b>Hello!</b>"; %> <%: message %> This automatic HTML Encoding will prevent many types of XSS attacks. It prevents <script> tags from being rendered and only allows &lt;script&gt; tags to be rendered which are useless for executing JavaScript. (This automatic HTML encoding does not protect you from all forms of XSS attacks. For example, you can assign the value “javascript:alert(‘evil’)” to the Hyperlink control’s NavigateUrl property and execute the JavaScript). The situation with Knockout is more complicated. If you use the Knockout TEXT binding then you get HTML encoded content. On the other hand, if you use the HTML binding then you do not: <!-- This JavaScript DOES NOT execute --> <div data-bind="text:someProp"></div> <!-- This Javacript DOES execute --> <div data-bind="html:someProp"></div> <script src="Scripts/jquery-1.7.1.js"></script> <script src="Scripts/knockout-2.1.0.js"></script> <script> var viewModel = { someProp : "<script>alert('Evil!')<" + "/script>" }; ko.applyBindings(viewModel); </script>   So, in the page above, the DIV element which uses the TEXT binding is safe from XSS attacks. According to the Knockout documentation: “Since this binding sets your text value using a text node, it’s safe to set any string value without risking HTML or script injection.” Just like server-side HTML encoding, Knockout does not protect you from all types of XSS attacks. For example, there is nothing in Knockout which prevents you from binding JavaScript to a hyperlink like this: <a data-bind="attr:{href:homePageUrl}">Go</a> <script src="Scripts/jquery-1.7.1.min.js"></script> <script src="Scripts/knockout-2.1.0.js"></script> <script> var viewModel = { homePageUrl: "javascript:alert('evil!')" }; ko.applyBindings(viewModel); </script> In the page above, the value “javascript:alert(‘evil’)” is bound to the HREF attribute using Knockout. When you click the link, the JavaScript executes. Cross-Site Request Forgery (CSRF) Attacks Cross-Site Request Forgery (CSRF) attacks rely on the fact that a session cookie does not expire until you close your browser. In particular, if you visit and login to MajorBank.com and then you navigate to Hackers.com then you will still be authenticated against MajorBank.com even after you navigate to Hackers.com. Because MajorBank.com cannot tell whether a request is coming from MajorBank.com or Hackers.com, Hackers.com can submit requests to MajorBank.com pretending to be you. For example, Hackers.com can post an HTML form from Hackers.com to MajorBank.com and change your email address at MajorBank.com. Hackers.com can post a form to MajorBank.com using your authentication cookie. After your email address has been changed, by using a password reset page at MajorBank.com, a hacker can access your bank account. To prevent CSRF attacks, you need some mechanism for detecting whether a request is coming from a page loaded from your website or whether the request is coming from some other website. The recommended way of preventing Cross-Site Request Forgery attacks is to use the “Synchronizer Token Pattern” as described here: https://www.owasp.org/index.php/Cross-Site_Request_Forgery_%28CSRF%29_Prevention_Cheat_Sheet When using the Synchronizer Token Pattern, you include a hidden input field which contains a random token whenever you display an HTML form. When the user opens the form, you add a cookie to the user’s browser with the same random token. When the user posts the form, you verify that the hidden form token and the cookie token match. Preventing Cross-Site Request Forgery Attacks with ASP.NET MVC ASP.NET gives you a helper and an action filter which you can use to thwart Cross-Site Request Forgery attacks. For example, the following razor form for creating a product shows how you use the @Html.AntiForgeryToken() helper: @model MvcApplication2.Models.Product <h2>Create Product</h2> @using (Html.BeginForm()) { @Html.AntiForgeryToken(); <div> @Html.LabelFor( p => p.Name, "Product Name:") @Html.TextBoxFor( p => p.Name) </div> <div> @Html.LabelFor( p => p.Price, "Product Price:") @Html.TextBoxFor( p => p.Price) </div> <input type="submit" /> } The @Html.AntiForgeryToken() helper generates a random token and assigns a serialized version of the same random token to both a cookie and a hidden form field. (Actually, if you dive into the source code, the AntiForgeryToken() does something a little more complex because it takes advantage of a user’s identity when generating the token). Here’s what the hidden form field looks like: <input name=”__RequestVerificationToken” type=”hidden” value=”NqqZGAmlDHh6fPTNR_mti3nYGUDgpIkCiJHnEEL59S7FNToyyeSo7v4AfzF2i67Cv0qTB1TgmZcqiVtgdkW2NnXgEcBc-iBts0x6WAIShtM1″ /> And here’s what the cookie looks like using the Google Chrome developer toolbar: You use the [ValidateAntiForgeryToken] action filter on the controller action which is the recipient of the form post to validate that the token in the hidden form field matches the token in the cookie. If the tokens don’t match then validation fails and you can’t post the form: public ActionResult Create() { return View(); } [ValidateAntiForgeryToken] [HttpPost] public ActionResult Create(Product productToCreate) { if (ModelState.IsValid) { // save product to db return RedirectToAction("Index"); } return View(); } How does this all work? Let’s imagine that a hacker has copied the Create Product page from MajorBank.com to Hackers.com – the hacker grabs the HTML source and places it at Hackers.com. Now, imagine that the hacker trick you into submitting the Create Product form from Hackers.com to MajorBank.com. You’ll get the following exception: The Cross-Site Request Forgery attack is blocked because the anti-forgery token included in the Create Product form at Hackers.com won’t match the anti-forgery token stored in the cookie in your browser. The tokens were generated at different times for different users so the attack fails. Preventing Cross-Site Request Forgery Attacks with a Single Page App In a Single Page App, you can’t prevent Cross-Site Request Forgery attacks using the same method as a server-side ASP.NET MVC app. In a Single Page App, HTML forms are not generated on the server. Instead, in a Single Page App, forms are loaded dynamically in the browser. Phil Haack has a blog post on this topic where he discusses passing the anti-forgery token in an Ajax header instead of a hidden form field. He also describes how you can create a custom anti-forgery token attribute to compare the token in the Ajax header and the token in the cookie. See: http://haacked.com/archive/2011/10/10/preventing-csrf-with-ajax.aspx Also, take a look at Johan’s update to Phil Haack’s original post: http://johan.driessen.se/posts/Updated-Anti-XSRF-Validation-for-ASP.NET-MVC-4-RC (Other server frameworks such as Rails and Django do something similar. For example, Rails uses an X-CSRF-Token to prevent CSRF attacks which you generate on the server – see http://excid3.com/blog/rails-tip-2-include-csrf-token-with-every-ajax-request/#.UTFtgDDkvL8 ). For example, if you are creating a Durandal app, then you can use the following razor view for your one and only server-side page: @{ Layout = null; } <!DOCTYPE html> <html> <head> <title>Index</title> </head> <body> @Html.AntiForgeryToken() <div id="applicationHost"> Loading app.... </div> @Scripts.Render("~/scripts/vendor") <script type="text/javascript" src="~/App/durandal/amd/require.js" data-main="/App/main"></script> </body> </html> Notice that this page includes a call to @Html.AntiForgeryToken() to generate the anti-forgery token. Then, whenever you make an Ajax request in the Durandal app, you can retrieve the anti-forgery token from the razor view and pass the token as a header: var csrfToken = $("input[name='__RequestVerificationToken']").val(); $.ajax({ headers: { __RequestVerificationToken: csrfToken }, type: "POST", dataType: "json", contentType: 'application/json; charset=utf-8', url: "/api/products", data: JSON.stringify({ name: "Milk", price: 2.33 }), statusCode: { 200: function () { alert("Success!"); } } }); Use the following code to create an action filter which you can use to match the header and cookie tokens: using System.Linq; using System.Net.Http; using System.Web.Helpers; using System.Web.Http.Controllers; namespace MvcApplication2.Infrastructure { public class ValidateAjaxAntiForgeryToken : System.Web.Http.AuthorizeAttribute { protected override bool IsAuthorized(HttpActionContext actionContext) { var headerToken = actionContext .Request .Headers .GetValues("__RequestVerificationToken") .FirstOrDefault(); ; var cookieToken = actionContext .Request .Headers .GetCookies() .Select(c => c[AntiForgeryConfig.CookieName]) .FirstOrDefault(); // check for missing cookie or header if (cookieToken == null || headerToken == null) { return false; } // ensure that the cookie matches the header try { AntiForgery.Validate(cookieToken.Value, headerToken); } catch { return false; } return base.IsAuthorized(actionContext); } } } Notice that the action filter derives from the base AuthorizeAttribute. The ValidateAjaxAntiForgeryToken only works when the user is authenticated and it will not work for anonymous requests. Add the action filter to your ASP.NET Web API controller actions like this: [ValidateAjaxAntiForgeryToken] public HttpResponseMessage PostProduct(Product productToCreate) { // add product to db return Request.CreateResponse(HttpStatusCode.OK); } After you complete these steps, it won’t be possible for a hacker to pretend to be you at Hackers.com and submit a form to MajorBank.com. The header token used in the Ajax request won’t travel to Hackers.com. This approach works, but I am not entirely happy with it. The one thing that I don’t like about this approach is that it creates a hard dependency on using razor. Your single page in your Single Page App must be generated from a server-side razor view. A better solution would be to generate the anti-forgery token in JavaScript. Unfortunately, until all browsers support a way to generate cryptographically strong random numbers – for example, by supporting the window.crypto.getRandomValues() method — there is no good way to generate anti-forgery tokens in JavaScript. So, at least right now, the best solution for generating the tokens is the server-side solution with the (regrettable) dependency on razor. Conclusion The goal of this blog entry was to explore some ways in which you need to handle security differently in the case of a Single Page App than in the case of a traditional server app. In particular, I focused on how to prevent Cross-Site Scripting and Cross-Site Request Forgery attacks in the case of a Single Page App. I want to emphasize that I am not suggesting that Single Page Apps are inherently less secure than server-side apps. Whatever type of web application you build – regardless of whether it is a Single Page App, an ASP.NET MVC app, an ASP.NET Web Forms app, or a Rails app – you must constantly guard against security vulnerabilities.

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  • Cloud MBaaS : The Next Big Thing in Enterprise Mobility

    - by shiju
    In this blog post, I will take a look at Cloud Mobile Backend as a Service (MBaaS) and how we can leverage Cloud based Mobile Backend as a Service for building enterprise mobile apps. Today, mobile apps are incredibly significant in both consumer and enterprise space and the demand for the mobile apps is unbelievably increasing in day to day business. An enterprise can’t survive in business without a proper mobility strategy. A better mobility strategy and faster delivery of your mobile apps will give you an extra mileage for your business and IT strategy. So organizations and mobile developers are looking for different strategy for meeting this demand and adopting different development strategy for their mobile apps. Some developers are adopting hybrid mobile app development platforms, for delivering their products for multiple platforms, for fast time-to-market. Others are adopting a Mobile enterprise application platform (MEAP) such as Kony for their enterprise mobile apps for fast time-to-market and better business integration. The Challenges of Enterprise Mobility The real challenge of enterprise mobile apps, is not about creating the front-end environment or developing front-end for multiple platforms. The most important thing of enterprise mobile apps is to expose your enterprise data to mobile devices where the real pain is your business data might be residing in lot of different systems including legacy systems, ERP systems etc., and these systems will be deployed with lot of security restrictions. Exposing your data from the on-premises servers, is not a easy thing for most of the business organizations. Many organizations are spending too much time for their front-end development strategy, but they are really lacking for building a strategy on their back-end for exposing the business data to mobile apps. So building a REST services layer and mobile back-end services, on the top of legacy systems and existing middleware systems, is the key part of most of the enterprise mobile apps, where multiple mobile platforms can easily consume these REST services and other mobile back-end services for building mobile apps. For some mobile apps, we can’t predict its user base, especially for products where customers can gradually increase at any time. And for today’s mobile apps, faster time-to-market is very critical so that spending too much time for mobile app’s scalability, will not be worth. The real power of Cloud is the agility and on-demand scalability, where we can scale-up and scale-down our applications very easily. It would be great if we could use the power of Cloud to mobile apps. So using Cloud for mobile apps is a natural fit, where we can use Cloud as the storage for mobile apps and hosting mechanism for mobile back-end services, where we can enjoy the full power of Cloud with greater level of on-demand scalability and operational agility. So Cloud based Mobile Backend as a Service is great choice for building enterprise mobile apps, where enterprises can enjoy the massive scalability power of their mobile apps, provided by public cloud vendors such as Microsoft Windows Azure. Mobile Backend as a Service (MBaaS) We have discussed the key challenges of enterprise mobile apps and how we can leverage Cloud for hosting mobile backend services. MBaaS is a set of cloud-based, server-side mobile services for multiple mobile platforms and HTML5 platform, which can be used as a backend for your mobile apps with the scalability power of Cloud. The information below provides the key features of a typical MBaaS platform: Cloud based storage for your application data. Automatic REST API services on the application data, for CRUD operations. Native push notification services with massive scalability power. User management services for authenticate users. User authentication via Social accounts such as Facebook, Google, Microsoft, and Twitter. Scheduler services for periodically sending data to mobile devices. Native SDKs for multiple mobile platforms such as Windows Phone and Windows Store, Android, Apple iOS, and HTML5, for easily accessing the mobile services from mobile apps, with better security.  Typically, a MBaaS platform will provide native SDKs for multiple mobile platforms so that we can easily consume the server-side mobile services. MBaaS based REST APIs can use for integrating to enterprise backend systems. We can use the same mobile services for multiple platform so hat we can reuse the application logic to multiple mobile platforms. Public cloud vendors are building the mobile services on the top of their PaaS offerings. Windows Azure Mobile Services is a great platform for a MBaaS offering that is leveraging Windows Azure Cloud platform’s PaaS capabilities. Hybrid mobile development platform Titanium provides their own MBaaS services. LoopBack is a new MBaaS service provided by Node.js consulting firm StrongLoop, which can be hosted on multiple cloud platforms and also for on-premises servers. The Challenges of MBaaS Solutions If you are building your mobile apps with a new data storage, it will be very easy, since there is not any integration challenges you have to face. But most of the use cases, you have to extract your application data in which stored in on-premises servers which might be under VPNs and firewalls. So exposing these data to your MBaaS solution with a proper security would be a big challenge. The capability of your MBaaS vendor is very important as you have to interact with your legacy systems for many enterprise mobile apps. So you should be very careful about choosing for MBaaS vendor. At the same time, you should have a proper strategy for mobilizing your application data which stored in on-premises legacy systems, where your solution architecture and strategy is more important than platforms and tools.  Windows Azure Mobile Services Windows Azure Mobile Services is an MBaaS offerings from Windows Azure cloud platform. IMHO, Microsoft Windows Azure is the best PaaS platform in the Cloud space. Windows Azure Mobile Services extends the PaaS capabilities of Windows Azure, to mobile devices, which can be used as a cloud backend for your mobile apps, which will provide global availability and reach for your mobile apps. Windows Azure Mobile Services provides storage services, user management with social network integration, push notification services and scheduler services and provides native SDKs for all major mobile platforms and HTML5. In Windows Azure Mobile Services, you can write server-side scripts in Node.js where you can enjoy the full power of Node.js including the use of NPM modules for your server-side scripts. In the previous section, we had discussed some challenges of MBaaS solutions. You can leverage Windows Azure Cloud platform for solving many challenges regarding with enterprise mobility. The entire Windows Azure platform can play a key role for working as the backend for your mobile apps where you can leverage the entire Windows Azure platform for your mobile apps. With Windows Azure, you can easily connect to your on-premises systems which is a key thing for mobile backend solutions. Another key point is that Windows Azure provides better integration with services like Active Directory, which makes Windows Azure as the de facto platform for enterprise mobility, for enterprises, who have been leveraging Microsoft ecosystem for their application and IT infrastructure. Windows Azure Mobile Services  is going to next evolution where you can expect some exciting features in near future. One area, where Windows Azure Mobile Services should definitely need an improvement, is about the default storage mechanism in which currently it is depends on SQL Server. IMHO, developers should be able to choose multiple default storage option when creating a new mobile service instance. Let’s say, there should be a different storage providers such as SQL Server storage provider and Table storage provider where developers should be able to choose their choice of storage provider when creating a new mobile services project. I have been used Windows Azure and Windows Azure Mobile Services as the backend for production apps for mobile, where it performed very well. MBaaS Over MEAP Recently, many larger enterprises has been adopted Mobile enterprise application platform (MEAP) for their mobile apps. I haven’t worked on any production MEAP solution, but I heard that developers are really struggling with MEAP in different way. The learning curve for a proprietary MEAP platform is very high. I am completely against for using larger proprietary ecosystem for mobile apps. For enterprise mobile apps, I highly recommend to use native iOS/Android/Windows Phone or HTML5  for front-end with a cloud hosted MBaaS solution as the middleware. A MBaaS service can be consumed from multiple mobile apps where REST APIs are using to integrating with enterprise backend systems. Enterprise mobility should start with exposing REST APIs on the enterprise backend systems and these REST APIs can host on Cloud where we can enjoy the power of Cloud for our services. If you are having REST APIs for your enterprise data, then you can easily build mobile frontends for multiple platforms.   You can follow me on Twitter @shijucv

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  • Rails + Nginx + Unicorn multiple apps

    - by Mikhail Nikalyukin
    I get the server where is currently installed two apps and i need to add another one, here is my configs. nginx.conf user www-data www-data; worker_processes 4; pid /var/run/nginx.pid; events { worker_connections 768; # multi_accept on; } http { sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; ## # Logging Settings ## access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; ## # Disable unknown domains ## server { listen 80 default; server_name _; return 444; } ## # Virtual Host Configs ## include /home/ruby/apps/*/shared/config/nginx.conf; } unicorn.rb deploy_to = "/home/ruby/apps/staging.domain.com" rails_root = "#{deploy_to}/current" pid_file = "#{deploy_to}/shared/pids/unicorn.pid" socket_file= "#{deploy_to}/shared/sockets/.sock" log_file = "#{rails_root}/log/unicorn.log" err_log = "#{rails_root}/log/unicorn_error.log" old_pid = pid_file + '.oldbin' timeout 30 worker_processes 10 # ????? ???? ? ??????????? ?? ????????, ???????? ??????? ? ??????? ???? ???? listen socket_file, :backlog => 1024 pid pid_file stderr_path err_log stdout_path log_file preload_app true GC.copy_on_write_friendly = true if GC.respond_to?(:copy_on_write_friendly=) before_exec do |server| ENV["BUNDLE_GEMFILE"] = "#{rails_root}/Gemfile" end before_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect! if File.exists?(old_pid) && server.pid != old_pid begin Process.kill("QUIT", File.read(old_pid).to_i) rescue Errno::ENOENT, Errno::ESRCH end end end after_fork do |server, worker| defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection end Also im added capistrano to the project deploy.rb # encoding: utf-8 require 'capistrano/ext/multistage' require 'rvm/capistrano' require 'bundler/capistrano' set :stages, %w(staging production) set :default_stage, "staging" default_run_options[:pty] = true ssh_options[:paranoid] = false ssh_options[:forward_agent] = true set :scm, "git" set :user, "ruby" set :runner, "ruby" set :use_sudo, false set :deploy_via, :remote_cache set :rvm_ruby_string, '1.9.2' # Create uploads directory and link task :configure, :roles => :app do run "cp #{shared_path}/config/database.yml #{release_path}/config/database.yml" # run "ln -s #{shared_path}/db/sphinx #{release_path}/db/sphinx" # run "ln -s #{shared_path}/config/unicorn.rb #{release_path}/config/unicorn.rb" end namespace :deploy do task :restart do run "if [ -f #{unicorn_pid} ] && [ -e /proc/$(cat #{unicorn_pid}) ]; then kill -s USR2 `cat #{unicorn_pid}`; else cd #{deploy_to}/current && bundle exec unicorn_rails -c #{unicorn_conf} -E #{rails_env} -D; fi" end task :start do run "cd #{deploy_to}/current && bundle exec unicorn_rails -c #{unicorn_conf} -E #{rails_env} -D" end task :stop do run "if [ -f #{unicorn_pid} ] && [ -e /proc/$(cat #{unicorn_pid}) ]; then kill -QUIT `cat #{unicorn_pid}`; fi" end end before 'deploy:finalize_update', 'configure' after "deploy:update", "deploy:migrate", "deploy:cleanup" require './config/boot' nginx.conf in app shared path upstream staging_whotracker { server unix:/home/ruby/apps/staging.whotracker.com/shared/sockets/.sock; } server { listen 209.105.242.45; server_name beta.whotracker.com; rewrite ^/(.*) http://www.beta.whotracker.com/$1 permanent; } server { listen 209.105.242.45; server_name www.beta.hotracker.com; root /home/ruby/apps/staging.whotracker.com/current/public; location ~ ^/sitemaps/ { root /home/ruby/apps/staging.whotracker.com/current/system; if (!-f $request_filename) { break; } if (-f $request_filename) { expires -1; break; } } # cache static files :P location ~ ^/(images|javascripts|stylesheets)/ { root /home/ruby/apps/staging.whotracker.com/current/public; if ($query_string ~* "^[0-9a-zA-Z]{40}$") { expires max; break; } if (!-f $request_filename) { break; } } if ( -f /home/ruby/apps/staging.whotracker.com/shared/offline ) { return 503; } location /blog { index index.php index.html index.htm; try_files $uri $uri/ /blog/index.php?q=$uri; } location ~ \.php$ { try_files $uri =404; include /etc/nginx/fastcgi_params; fastcgi_pass unix:/var/run/php-fastcgi/php-fastcgi.socket; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; } location / { proxy_set_header HTTP_REFERER $http_referer; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_redirect off; proxy_max_temp_file_size 0; # If the file exists as a static file serve it directly without # running all the other rewite tests on it if (-f $request_filename) { break; } if (!-f $request_filename) { proxy_pass http://staging_whotracker; break; } } error_page 502 =503 @maintenance; error_page 500 504 /500.html; error_page 503 @maintenance; location @maintenance { rewrite ^(.*)$ /503.html break; } } unicorn.log executing ["/home/ruby/apps/staging.whotracker.com/shared/bundle/ruby/1.9.1/bin/unicorn_rails", "-c", "/home/ruby/apps/staging.whotracker.com/current/config/unicorn.rb", "-E", "staging", "-D", {5=>#<Kgio::UNIXServer:/home/ruby/apps/staging.whotracker.com/shared/sockets/.sock>}] (in /home/ruby/apps/staging.whotracker.com/releases/20120517114413) I, [2012-05-17T06:43:48.111717 #14636] INFO -- : inherited addr=/home/ruby/apps/staging.whotracker.com/shared/sockets/.sock fd=5 I, [2012-05-17T06:43:48.111938 #14636] INFO -- : Refreshing Gem list worker=0 ready ... master process ready ... reaped #<Process::Status: pid 2590 exit 0> worker=6 ... master complete Deploy goes successfully, but when i try to access beta.whotracker.com or ip-address i get SERVER NOT FOUND error, while others app works great. Nothing shows up in error logs. Can you please point me where is my fault?

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  • some windows 8 metro (modern UI) apps don't open, but live tiles DO work

    - by DiegoDD
    Some of my default windows 8 metro (modern UI) apps don't work properly, the apps are the Weather and the News apps. when I open them, I only get the loading screen, that is, the big colorful screen with the logo in the center, and the "loading" spinning dots. They just keep like that forever and never actually open. There are no error messages or anything. The strange this is that the live tiles for those apps DO work and show current information. current weather for my location (saved before they started failing) and current news. Both apps did work well in the past, and every other default windows 8 app I've tried work well (both live tiles and the app itself). Every other non-default apps that I've downloaded still work correctly, so the problem so far is only with those two apps. (weather and news). I really don't know since when exactly they started to fail because I really don't use them (or any metro app) that often, so I can't recall if I did something like installing some other app, either metro or regular, or messed with some drivers, etc. they simply don't open now, but they DID work before. any ideas?

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