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• Disco/MapReduce: Using results of previous iteration as input to new iteration

  - by muckabout

  Currently am implementing PageRank on Disco. As an iterative algorithm, the results of one iteration are used as input to the next iteration. I have a large file which represents all the links, with each row representing a page and the values in the row representing the pages to which it links. For Disco, I break this file into N chunks, then run MapReduce for one round. As a result, I get a set of (page, rank) tuples. I'd like to feed this rank to the next iteration. However, now my mapper needs two inputs: the graph file, and the pageranks. I would like to "zip" together the graph file and the page ranks, such that each line represents a page, it's rank, and it's out links. Since this graph file is separated into N chunks, I need to split the pagerank vector into N parallel chunks, and zip the regions of the pagerank vectors to the graph chunks This all seems more complicated than necessary, and as a pretty straightforward operation (with the quintessential mapreduce algorithm), it seems I'm missing something about Disco that could really simplify the approach. Any thoughts?

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• Error when creating a new entity foo, editing a previously existing foo, then saving. Generic 4004 e

  - by Tarks

  The steps are as simple as that so I imagine there's something else going on here, the problem is I just get back 4004, no exception anywhere etc, making it annoying to debug, I get this from the ie error window Microsoft JScript runtime error: Unhandled Error in Silverlight Application Code: 4004 Category: ManagedRuntimeError Message: System.Windows.Ria.DomainOperationException: Submit operation failed. An error occurred while updating the entries. See the inner exception for details. at System.Windows.Ria.OperationBase.Complete(Exception error) at System.Windows.Ria.SubmitOperation.Complete(Exception error) at System.Windows.Ria.DomainContext.CompleteSubmitChanges(IAsyncResult asyncResult) at System.Windows.Ria.DomainContext.<c_DisplayClassd.b_5(Object ) public void TurnPage(bool forward) { TurnPageForward = forward; // If the pages are already turning then don't try and skip days, just run the animation function so it inreases the speed if (!workBook.IsTransitioning && !IsWaitingForData) { IsWaitingForData = true; workBook.SnapshotPages(); NoteCtx.SubmitChanges().Completed += (s, a) => { workBook.ClearPageContents(); CurrentDate = CurrentDate.AddDays(forward ? 1 : -1); PullNotes(CurrentDate); }; } else { workBook.BeginTurnPages(TurnPageForward); } } public void PullNotes(DateTime? noteTime) { NoteCtx.NoteItems.Clear(); var loadOp = NoteCtx.Load(NoteCtx.GetNoteItemsForDayQuery(CurrentDate)); loadOp.Completed += new EventHandler(NotesReady); }

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• How to arrange models, views, controllers in a new Kohana 3 project

  - by Pekka

  I'm looking at how to set up a mid-sized web application with Kohana 3. I have implemented MVC patterns in the past but never worked against a "formalized" MVC framework so I'm still getting my head around the terminology - toying around with basic examples, building views and templates, and so on. I'm progressing fairly well but I want to set up a real-world web project (one of my own that I've been planning for quite some time now) as a learning object. Example-based documentation is a bit sparse for Kohana 3 right now - they say so themselves on the site. While I'm not worried about learning the framework soon enough, I'm a bit at a loss on how to arrange a healthy code base from the start - i.e. how to split up controllers, how to name them, and how to separate the functionality into the appropriate models. My application could, in its core, be described as a business directory with a main businesses table. Businesses can be listed by category and by street name. Each business has a detail page. Business owners can log in and edit their business's entry. Businesses can post offers into an offers table. I know this is pretty vague, I'll be more than happy to go into more detail on request. Supposing I have all the basic functionality worked out and in place already - list all businesses, edit business, list businesses by street name, create offer, and so on, and I'm just looking for how to fit the functionality into a Kohana application structure that can be easily extended: Do you know real-life, publicly accessible examples of applications built on Kohana 3 where I could take a peek how they do it? Are there conventions or best practices on how to structure an extendable login area for end users in a Kohana project that is not only able to handle a business directory page, but further products on separate pages as well? Do you know application structuring HOWTOs or best practices for Kohana 3 not mentioned in the user guide and the inofficial Wiki? Have you built something similar and could give me some recommendations?

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• apache: cgi links lead to a "you have chosen to open foo.cgi", although scriptalias is set

  - by Xiong Chiamiov

  Following this guide on CentOS 5.2, just getting nagios set up for the first time. The main page shows up just fine, but when I try to view any of the pages that should be generated by a cgi process, firefox prompts me to save the .cgi instead, so apache's obviously not understanding that it needs to run the cgi and get back some html from it. The odd thing is, though, that, as far as I can tell, apache should be running these files as cgi. nagios.conf: # SAMPLE CONFIG SNIPPETS FOR APACHE WEB SERVER # Last Modified: 11-26-2005 # # This file contains examples of entries that need # to be incorporated into your Apache web server # configuration file. Customize the paths, etc. as # needed to fit your system. ScriptAlias /nagios/cgi-bin/ "/usr/lib/nagios/cgi/" # SSLRequireSSL Options +ExecCGI AddHandler cgi-script .cgi AllowOverride None Order allow,deny Allow from all # Order deny,allow # Deny from all # Allow from 127.0.0.1 AuthName "Nagios Access" AuthType Basic AuthUserFile /etc/nagios/htpasswd.users Require valid-user Alias /nagios "/usr/share/nagios/" # SSLRequireSSL DirectoryIndex index.php Options None AllowOverride None Order allow,deny Allow from all # Order deny,allow # Deny from all # Allow from 127.0.0.1 AuthName "Nagios Access" AuthType Basic AuthUserFile /etc/nagios/htpasswd.users Require valid-use Either the ScriptAlias directive or ExecCGI option should be triggering this, but neither of them seems to have any effect. This config file is being parsed by apache, because if I move it out of conf.d, /nagios gives a 404. The .cgi files are indeed in the /nagios/cgi-bin/ directory, so I didn't specify the incorrect directory. Searching seemed to only provide people who had difficulty with permissions, which is not the issue here. This seems to me to be a pretty basic thing, but even with the excellent apache documentation, I'm at a bit of a loss (been using cherokee too much lately :) ).

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• Building a Drupal Newsletter Module for handling Newsletter Articles

  - by Michael T. Smith

  We're building a module for generating HTML for email newsletters. We've looked into using a few other modules (SimpleNews, MailChimp, among others), but due to various requirements, it'll be easier and better for us to build a custom solution. Being a new Drupal developer, I'm a bit worried about handling this in a "non-Drupal" way. That being said, my plan is to setup a vocabulary with Newsletters as a term and the actual Newsletters as sub-terms, like so: Newsletters (term) - Newsletter A (sub-term) - Newsletter B (sub-term) This has the added benefit of being able to organize where articles were published (besides just on the site.) The question, though, is how to handle the different Newsletter issues. I could go another level deeper in the vocabulary, like so: Newsletters (term) - Newsletter A (sub-term) - Issue - 2010-03-01 - Issue - 2010-03-02 - Newsletter B (sub-term) - Issue - 2010-03-01 - Issue - 2010-03-08 But I'm wondering if this is adding a bit too much complexity. Once I have this taxonomy setup, when the user went to add new newsletters it would also create a node (content type: newsletter), and when he/she went to add new issues, it would also create a node (content type: issue.) Those would then be the landing pages for that content. So, the question is is there a better way for handling this structure? Is this a Drupal-like solution?

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• Linq - how does it work??

  - by clarkeyboy

  Hey, I have just been looking into Linq with ASP.Net. It is very neat indeed. I was just wondering - how do all the classes get populated? I mean in ASP.Net, suppose you have a Linq file called Catalogue, and you then use a For loop to loop through Catalogue.Products and print each Product name. How do the details get stored? Does it just go through the Products table on page load and create another instance of class Product for each row, effectively copying an entire table into an array of class Product? If so, I think I have created a system very much like this, in the sense that there is a SiteContent module with an instance of each Manager class - for example there is UserManager, ProductManager, SettingManager and alike. UserManager contains an instance of the User class for each row in the Users table. They also contain methods such as Create, Update and Remove. These Managers and their "Items" are created on every page load. This just makes it nice and easy to access users, products, settings etc in every page as far as I, the developer, am concerned. Any any subsequent pages I need to create, I just need to reference SiteContent.UserManager to access a list of users, rather than executing a query from within that page (ie this method separates out data access from the workings of the page, in the same way as using code behind separates out the workings of the page from how the page is layed out). However the problem is that this technique seems rather slow. I mean it is effectively creating a database on every page load, taking data from another database. I have taken measures such as preventing, for example, the ProductManager from being created if it is not referenced on page load. Therefore it does not load data into storage when it is not needed. My question is basically whether my technique does the exact same thing as Linq, in the sense of duplicating data from tables into properties of classes.. Thanks in advance for any advice or answers about this. Regards, Richard Clarke

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• Error 404: No target servlet configured for uri

  - by Aman

  Hi Experts, I just got done with a new Web module built with Spring Framework. Till now I was testing all the pages on my local machine using Tomcat. Today after I moved the application to Websphere, I am getting the following error: Error 404: No target servlet configured for uri is there anything I need to do in web.xml or somewhere? I deployed an EAR file on my WAS , which has another war file. Below is the output I am seeing on the console, if thats any help. The resource WEB-INF/ibm-web-bnd.xmi that is defined in URI WEB-INF/ibm-web-bnd.xmi for module analytics.war is not valid. The resource has a cross reference org.eclipse.jst.j2ee.webapplication.internal.impl.WebAppImpl@4be44be4 (eProxyURI: WEB-INF/web.xml#WebApp_ID) that cannot be resolved. [6/17/09 15:24:49:465 CDT] 00000011 ArchiveDeploy W ADMA0091E: The resource WEB-INF/ibm-web-ext.xmi that is defined in URI WEB-INF/ibm-web-ext.xmi for module analytics.war is not valid. The resource has a cross reference org.eclipse.jst.j2ee.webapplication.internal.impl.WebAppImpl@7b7a7b7a (eProxyURI: WEB-INF/web.xml#WebApp_ID) that cannot be resolved.

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• Diff between <head id="Head1" runat="server"> and <asp:ContentPlaceHolder runat="server" ID="HeadCon

  - by justSteve

  Looking for an better understanding of how an mvc project should define javascript and css includes. I'm working with sample code where includes are defined like: <head id="Head1" runat="server"> <title><asp:ContentPlaceHolder ID="TitleContent" runat="server" />Affiliate Checkout</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta http-equiv="pragma" content="no-cache"> <script type="text/javascript" src="/Scripts/jquery.js"></script> <script type="text/javascript" src="/Scripts/jquery-ui-1.7.2.custom.min.js"></script> . . . <asp:ContentPlaceHolder runat="server" ID="HeadContent"></asp:ContentPlaceHolder> </head> I'm reading that to be that _all pages looking at this MasterPage will get jquery and jqueryUI and, additionally, each page will have the opportunity to add head elements thankx to the content placeholder HeadContent tag. The specific problem i'm troubleshooting is an instance where my rendered page is not including the 'prama no-cache' tag - as you see, it's defined in the upper level header section. Other .js and .css elements are making it into the rendered page so it very confusing to see that the no-cache tag isn't. When execute a 'View Generated Source' - the 'charset' is present the 'no-cache' is not.

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• iphone bookmarklet cookie persistence

  - by Larry Davis

  I have an iphone (jqtouch based) web app that uses cookies for authentication. The use flow is as follows : user goes to the mobile landing page and is instructed to save the page as a bookmarklet on their home page. they launch the bookmarklet to go to a login page to login and get a cookie. the cookie works and they can navigate throughout the web site. However this session cookie is not persistent. If they leave safari and then restart using the saved bookmarklet, the cookies set during their previous session are gone. Just using safari (ie: launch safari directly rather than through the bookmarklet) to navigate the pages works fine (ie: start safari, go to url, do login, restart safari, go back to url). I find that that the cookies that were active when the bookmarklet was created are persistent but any cookies set during the session when safari is accessed through the bookmarklet are not persistent. I'm wondering if this is a safari/iphone issue and/or if there is any way around this. Many thanks for any insight you can provide.

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• Open source Java CMS for Google App Engine?

  - by markvgti

  I am looking for an open source Java CMS (Web CMS, actually) to run on Google App Engine. I have looked at related older questions on this topic (What CMS runs on Google AppEngine?, CMS over Google App Engine, with SEO etc.) but the problem is that they all largely list Python-based CMSes. Plus these questions are pretty old, and since GAE is a fast-moving target, I thought it might be worthwhile to ask again. I want a CMS for creating some websites (for myself and for others), but would rather not start writing one from scratch. A "good" (very subjective, I know) open source WCMS allows me to start using a product, while still being able to add to/extend the product/project. On the one hand I am looking for a somewhat mature product/project, on the other hand it's easier to start contributing to the development cycle of a young product/project (conflicting, I know :-). Here are some features that would be preferable: [X]HTML/XML/CSS based templating Ability to create multiple blogs Galleries Ability to create a "Downloads" section (is this pretty much standard?) Separate management for digital assets (images, PDFs, binary files etc.) Roles like "Administrator", "Editor", "Contributor" etc. (or their equivalents) Ability to move/reorganize pages Export to PDF Reformat content for printing Is the CMS you are about to suggest especially well-suited to publishing an online book? My idea is that while the book may be offered as a downloadable eBook, the latest, most current version will be the one available on the website.

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• UIScrollView without paging but with touchesmoved

  - by BittenApple

  I have a UIScrollView that I use to display PDF pages in. I don't want to use paging (yet). I want to display content based on touchesmoved event (so after horizontal swipe). This works (sort of), but instead of catching a single swipe and showing 1 page, the swipe seems to gets broken into 100s of pieces and 1 swipe acts as if you're moving a slider! I have no clue what am I doing wrong. Here's the experimental "display next page" code which works on single taps: - (void)nacrtajNovuStranicu:(CGContextRef)myContext { CGContextTranslateCTM(myContext, 0.0, self.bounds.size.height); CGContextScaleCTM(myContext, 1.0, -1.0); CGContextSetRGBFillColor(myContext, 255, 255, 255, 1); CGContextFillRect(myContext, CGRectMake(0, 0, 320, 412)); size_t brojStranica = CGPDFDocumentGetNumberOfPages(pdfFajl); if(pageNumber < brojStranica){ pageNumber ++; } else{ // kraj PDF fajla, ne listaj dalje. } CGPDFPageRef page = CGPDFDocumentGetPage(pdfFajl, pageNumber); CGContextSaveGState(myContext); CGAffineTransform pdfTransform = CGPDFPageGetDrawingTransform(page, kCGPDFCropBox, self.bounds, 0, true); CGContextConcatCTM(myContext, pdfTransform); CGContextDrawPDFPage(myContext, page); CGContextRestoreGState(myContext); //osvjezi displej [self setNeedsDisplay]; } Here's the swiping code: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesBegan:touches withEvent:event]; UITouch *touch = [touches anyObject]; gestureStartPoint = [touch locationInView:self]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint currentPosition = [touch locationInView:self]; CGFloat deltaX = fabsf(gestureStartPoint.x - currentPosition.x); CGFloat deltaY = fabsf(gestureStartPoint.y - currentPosition.y); if (deltaX >= kMinimumGestureLength && deltaY <= kMaximumVariance) { [self nacrtajNovuStranicu:(CGContextRef)UIGraphicsGetCurrentContext()]; } } The code sits in UIView which displays the PDF content, perhaps I should place it into UIScrollView or is the "display next page" code wrong?

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• Classic ASP Session not working in IIS 7 Windows Server 2008 R2 x64

  - by user553361

  Hi, I've been googleing and searching here info about this but so far couldn't find anything relevant to my problem. We have a website currently working on II6 and Windows Server 2003 (x86) without any problem. Now we want to migrate our server to a Virtual Machine with Windows Server 2008 R2 (x64) and IIS7. Out current app is built in Classic ASP and SQL Server (This one located on a 2nd Server but this is staying the way it is now). The website is configured as a WebSite, not a virtual directory. Using DefaultAppPool with 4 applications. Now, the problem I'm getting is with the Sessions, or at least that's what I think since I created a simple hello.asp with this code <% response.write "Hello" response.write Session.SessionID %> And this is giving us this result: Hello error '8002801d' /hello.asp, line 3 ASP Sessions Properties Enable Session State : True Maximum Sessions : 2147483647 New ID On Secure Connection : True Time-out : 20 min This is the log in Event Viewer Warning 24/12/2010 14:03:42 Active Server Pages 9 None FailedReqLog Url http://apps.shocklogic.com:80/hello.asp App Pool DefaultAppPool Authentication anonymous User from token NT AUTHORITY\IUSR Activity ID {00000000-0000-0000-1400-0080000000F8} Site 1 Process 3312 Failure Reason STATUS_CODE Trigger Status 500 Final Status 500 Time Taken 110 msec Would be great if anyone has any ideas. Thanks, Federico

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• Trying to grab just absolute links from a webpage using BeautifulSoup

  - by Kevin

  I am reading the contents of a webpage using BeautifulSoup. What I want is to just grab the <a href> that start with http://. I know in beautifulsoup you can search by the attributes. I guess I am just having a syntax issue. I would imagine it would go something like. page = urllib2.urlopen("http://www.linkpages.com") soup = BeautifulSoup(page) for link in soup.findAll('a'): if link['href'].startswith('http://'): print links But that returns: Traceback (most recent call last): File "<stdin>", line 2, in <module> File "C:\Python26\lib\BeautifulSoup.py", line 598, in __getitem__ return self._getAttrMap()[key] KeyError: 'href' Any ideas? Thanks in advance. EDIT This isn't for any site in particular. The script gets the url from the user. So internal link targets would be an issue, that's also why I only want the <'a'> from the pages. If I turn it towards www.reddit.com, it parses the beginning links and it gets to this: <a href="http://www.reddit.com/top/">top</a> <a href="http://www.reddit.com/saved/">saved</a> Traceback (most recent call last): File "<stdin>", line 2, in <module> File "C:\Python26\lib\BeautifulSoup.py", line 598, in __getitem__ return self._getAttrMap()[key] KeyError: 'href'

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• Adding a navigation bar to a web view in a tab bar app

  - by Henrik Erlandsson

  I've built the tab bar application in IB, with three tabs. The third tab happily displays a UIWebview where you can browse. The only thing missing is a back button, as not all web pages supply such a link. I need a navigation bar hooked up properly to the correct classes. I'm still a bit unsure about exactly how the hierarchy should look in interface builder and how to hook it up properly. Currently, the third tab is hooked up to a referencing outlet called 'webnews' in the class 'thirdviewcontroller', and the UIWebView (under a normal IUView in the hierarchy, which in turn is under the third tab bar controller) is connected to the webnews outlet. How do I make the navbar control the webview, and do I add code to the thirdviewcontroller.m that lets the navbar on the view control the webview 'back' function? What do I hook up as the delegate for it? Currently I have an app delegate, but that's hooked up to the tab bar. I'm not really after specific code as much as a general 'how it works' clue :) (Unless I can just add the navbar dynamically to the functioning app... but I don't think addSubView on viewWillAppear {} in thirdviewcontroller.m will create the proper functionality?) If I were to guess at the simplest solution, I'd guess create a navbarcontroller.h/.m, slap a navbar on the view in IB, connect the third tab to navbarcontroller, connect the navbar to the webview (?) and move the webnews outlet to navbarcontroller.h, and connect the webview to it. But I don't quite have the nerve to try, better to ask advice first.

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• web.xml - Java Servlet Filters and WebSphere - URL Pattern issues

  - by Ed

  Hi, So we are running a web application that has been tested on Tomcat, Glassfish, WebLogic and WebSphere. All run correctly except WebSphere. The issue is that filters are not processed for files under a certain directory. For example I have a filter that checks the user's lanuage from browser cookies and another that get the user's username, in the web.xml there are configured like so: <!-- ****************************** --> <!-- * Security context filtering * --> <!-- ****************************** --> <filter> <filter-name>SetSecurityContextFilter</filter-name> <filter-class> com.test.security.SecurityContextServletFilter </filter-class> </filter> <!-- ****************************** --> <!-- ** Locale context filtering ** --> <!-- ****************************** --> <filter> <filter-name>SetLocaleFilter</filter-name> <filter-class> com.test.locale.LocaleServletFilter </filter-class> </filter> <filter-mapping> <filter-name>SetSecurityContextFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>SetLocaleFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> Both filters set a static threadlocal variable which can be accessed from a static getter, but when the same file 'test.jsp' invokes the getters, under 'contextroot/js' they return the default values (as if unset) while under 'contextroot/pages' they are correct. Any ideas? Thanks in advance.

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• How to check whether a user belongs to an AD group and nested groups?

  - by elsharpo

  hi guys, I have an ASP.NET 3.5 application using Windows Authentication and implementing our own RoleProvider. Problem is we want to restrict access to a set of pages to a few thousand users and rathern than inputing all of those one by one we found out they belong to an AD group. The answer is simple if the common group we are checking membership against the particular user is a direct member of it but the problem I'm having is that if the group is a member of another group and then subsequently member of another group then my code always returns false. For example: Say we want to check whether User is a member of group E, but User is not a direct member of *E", she is a member of "A" which a member of "B" which indeed is a member of E, therefore User is a member of *E" One of the solutions we have is very slow, although it gives the correct answer using (var context = new PrincipalContext(ContextType.Domain)) { using (var group = GroupPrincipal.FindByIdentity(context, IdentityType.Name, "DL-COOL-USERS")) { var users = group.GetMembers(true); // recursively enumerate return users.Any(a => a.Name == "userName"); } } The original solution and what I was trying to get to work, using .NET 3.5 System.DirectoryServices.AccountManagement and it does work when users are direct members of the group in question is as follows: public bool IsUserInGroup(string userName, string groupName) { var cxt = new PrincipalContext(ContextType.Domain, "DOMAIN"); var user = UserPrincipal.FindByIdentity(cxt, IdentityType.SamAccountName, userName); if (user == null) { return false; } var group = GroupPrincipal.FindByIdentity(cxt, groupName); if (group == null) { return false; } return user.IsMemberOf(group); } The bottom line is, we need to check for membership even though the groups are nested in many levels down. Thanks a lot!

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• IE History Tracking, IFRAMES, and Cross Domain error...

  - by peiklk

  So here's the deal. We have a Flash application that is running within an HTML file. For one page we call a legacy reporting system in ASP.NET that is within an IFRAME. This page then communicates back to the Flash application using cross-domain scripting (document.domain = "domain" is set in both pages. THIS ALL WORKS. Now the kicker. Flash has history tracking enabled. This loads the history.js file that created a div tag to store page changes so the back and forward buttons work in the browser. Which works for Firefox and Chrome as they create a div tag. HOWEVER In Internet Explorer, history.js creates another IFRAME (instead of a DIV) called ie_historyFrame. When the ScriptResource.axd code attempts to access this with: var frameDoc = this._historyFrame.contentWindow.document; we get an "Access is Denied" error message. ARGH! We've tried getting a handle to this IFRAME and inserting the document.domain code. FAIL. We've tried editing the historytemplate.html file that flex also uses to include document.domain... FAIL. I've tried to edit the underlying ASP.NET page to disable history tracking in the ScriptManager control. FAIL. At my wit's end on this one. We have users who need to use IE to access this site. They are big clients who we cannot tell to just use Firefox. Any suggestions would be greatly appreciated.

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• MATLAB Builder NE (.NET Assembly) Data type question

  - by Brett

  Hi coders, I am using MATLAB Builder NE (MATLAB's integrated .NET assmebly builder), but I am having an issue with data types. I have compiled a small, very simple, function in matlab and build it for .NET. I am able to call the namespace and even the function just fine. However, my function returns a value, and MATLAB defaults to returning it as an "object[]" data type. However, I know that the value is an integer, but I can't figure out how to cast it. My MATLAB function looks like this: function addValue = Myfunction(value1, value2) addValue=value1+value2; end Pretty simple right? And then in .NET I can call it as: xClass.addValue (1, 3, 4); where xClass is the name of the MATLAB built class but when I try: int x = xClass.addValue (1, 3, 4); C# errors out. Typical .NET casting (int) doesn't work. The compiler states it cannot convert object[] to int. Does anyone have experience with the .NET builder in MATLAB that can help me with this? It is really throwing me for a loop. I have scanned through most of the MATLAB BUILDER doc (484 pages!) with zero help. Thank you, Brett

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• Redirect to new page if cookie doesn't exist or if the value of cookie is 'false'

  - by liquilife

  I have a DOB 'Are you over 18' script which when the form is filled out, validates if they are over 18 or not for a tobacco site I am working on. When this form is filled it stores a cookie 'ageCheck' with a value of either true or false. I'm having some issues with a bit of javascript which is stored on all the pages to determine if they can view the page or if they need to be redirected to the verification page. The javascript is supposed to set a div ID to 'display:block' if passed and if no cookie is found OR the cookie value is false is supposed to redirect them to the age verification page. However, it's just not working. I see the cookies are set correctly. Below is my code.. any help is appreciated. <script> document.body.onload = function() { var ageCheck = getCookie('ageCheck'); if ('true' == ageCheck) { document.getElementById('content').style.display = ''; } else { document.location = '/ageCheck.html'; } } function getCookie(c_name) { if (document.cookie.length > 0) { c_start = document.cookie.indexOf(c_name + "="); if (c_start != -1) { c_start = c_start + c_name.length + 1; c_end = document.cookie.indexOf(";", c_start); if (c_end == -1) c_end = document.cookie.length; return unescape(document.cookie.substring(c_start, c_end)); } } return ""; } </script>

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• Which Computer Organization & Architecture book is good for me?

  - by claws

  I'm always interested in learning the inner working of things. I started with C programming and then learnt Operating systems (from stallings) and then linkers & loaders and then assembly language after reading these now I want to go into little more depth. Computer Architecture. I feel that makes everything clear. As per SO archives these are the two good books: Computer Architecture: A Quantitative Approach, 4th Edition Computer Organization and Design, Fourth Edition, ~ David A. Patterson, John L. Hennessy But I've browsed through the contents of these books and found that they don't exactly meet my needs. I want to learn more about caches, Memory Management Unit , mapping b/w virtual memory & physical memory I'm no way interested in other ISAs like MIPS etc.. I'm IA32 and X86-64 fan and I want to stick to it. I'm not a hardware developer I don't want to details like circuit diagrams or How is L1, L2 & L3 caches are implemented? I want to know the parallel processing technologies like HyperThreading at the architecture level but again I don't want to design them. I liked the table of Contents of - Computer Architecture: A Quantitative Approach, 4th Edition but Quantitave Approach? Seriously?? I want to know the details of current technologies and I dont want to spend reading 200 pages of outdated old technologies ( I experienced this while learning ASM}

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• custom httphandler in asp.net cannot get request querystring?

  - by Sander

  i've been trying to get this to work. its basicly a way to have certain MVC pages work within a webforms cms (umbraco) someone tried it before me and had issues with MVC2.0 (see here), i read the post, did what was announced there, but with or without that code, i seem to get stuck on a different matter. it seems like, if i call an url, it fires the handler, but fails to request the querystring passed, the variable originalPath is always empty, for example i call this url: http://localhost:8080/mvc.ashx?mvcRoute=/home/RSVPForm the handler is supposed to get the mvcRoute but it is always empty. thus gets rewritten to a simple / and then returns resource cannot be found error. here is the code i use now public void ProcessRequest(HttpContext httpContext) { string originalPath = httpContext.Request.Path; string newPath = httpContext.Request.QueryString["mvcRoute"]; if (string.IsNullOrEmpty(newPath)) newPath = "/"; HttpContext.Current.RewritePath(newPath, false); IHttpHandler ih = (IHttpHandler)new MvcHttpHandler(); ih.ProcessRequest(httpContext); HttpContext.Current.RewritePath(originalPath, false); } i would like some new input on this as i'm staring myself blind on such a simple issue, while i thought i would have more problems with mvc itself :p Edit have no time to investigate, but after copying the site over to different locations, using numerous web.config changes (unrelated to this error but was figuring other things out) this error seems to have solved itself. so its no longer an issue, however i have no clue as to what exactly made this to work again.

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• Is there an extension or a way to write an extension for firefox that allows a developer to refresh

  - by Kevin J

  I'm a developer, and I spend much of my day refreshing the webapps I work on. Occasionally, I'll encounter pages where POST data was submitted, and firefox will prompt me to Resend POST data or to Cancel. Now, I know that I can just redirect a page to itself to get rid of this warning, but I still want to keep this warning for our users; I just want to be able to skip it while developing. It's also not just on one page, but at many different points throughout the app, so it's not like I can just do if $debug==true then redirect or something like that. Basically just a minor convenience issue, but when I encounter the message 50-100 times a day, it can get aggravating. What I want to do is essentially have 3 options when refreshing: Resend POST data, cancel, or refresh without resending POST data The third option would be equivalent to clicking "enter" in the address bar (which is what I end up having to do). The problem with clicking enter is that I often have to "hard refresh" using ctrl+shift+r, but if I do this with POST data I have to click cancel, then click enter on the address bar, then do a hard refresh after that. I would instead like to press ctrl+shift+r, then continue hard refreshing the page without the POST data. Does anyone know how to do this? Through an extension or otherwise? It's totally a minor issue, but it's something that constantly bothers me and I actually think it would be quite a useful option. Thanks

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• Problem with Tapestry palette's arrow icons in IE8

  - by JellyHead

  I'm using Tapestry to create pages for a web app, and have been using the palette component to add/delete items to/from a group. The page looks great in Firefox (Tapestry seems biased towards Firefox), but my customers will all be using Internet Explorer (any versions from 6, 7, & 8) and in IE8, the disabled arrow buttons look awful. In Firefox, they are faded, using an opacity setting of 25%, but this doesn't work in IE8 and instead you get a faded image with an ugly black border around the image. In tapestry-core's stylesheet (default.css), you have the following for a disabled arrow button. DIV.t-palette-controls BUTTON[disabled] IMG { filter: alpha(opacity = 25); -moz-opacity: .25; } These are clearly out of date, as -moz-opacity is no longer supported by Firefox (use opacity: 25 instead). The problem is with filter: "alpha(opacity = 25);". If I remove this, the arrows look fine in IE8, but they are not faded. I got the magic instruction: -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(opacity=25)"; from various websites, but putting this in does not work either - the arrow icons are ugly again. The icon itself (distributed with Tapestry) just seems to be a regular PNG, but I'm not an expert on image formats, so maybe there's a problem there? Anyone else had this problem?

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• using ghostscript in server mode to convert pdfs to pngs

  - by emh

  while i am able to convert a specific page of a PDF to a PNG like so: gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -dGraphicsAlphaBits=4 -sOutputFile=gymnastics-20.png -dFirstPage=20 -dLastPage=20 gymnastics.pdf i am wondering if i can somehow use ghostscript's JOBSERVER mode to process several conversions without having to incur the cost of starting up ghostscript each time. from: http://pages.cs.wisc.edu/~ghost/doc/svn/Use.htm -dJOBSERVER Define \004 (^D) to start a new encapsulated job used for compatibility with Adobe PS Interpreters that ordinarily run under a job server. The -dNOOUTERSAVE switch is ignored if -dJOBSERVER is specified since job servers always execute the input PostScript under a save level, although the exitserver operator can be used to escape from the encapsulated job and execute as if the -dNOOUTERSAVE was specified. This also requires that the input be from stdin, otherwise an error will result (Error: /invalidrestore in --restore--). Example usage is: gs ... -dJOBSERVER - < inputfile.ps -or- cat inputfile.ps | gs ... -dJOBSERVER - Note: The ^D does not result in an end-of-file action on stdin as it may on some PostScript printers that rely on TBCP (Tagged Binary Communication Protocol) to cause an out-of-band ^D to signal EOF in a stream input data. This means that direct file actions on stdin such as flushfile and closefile will affect processing of data beyond the ^D in the stream. the idea is to run ghostscript in-process. the script would receive a request for a particular page of a pdf and would use ghostscript to generate the specified image. i'd rather not start up a new ghostscript process every time.

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• What is the best way to route a static controller in Rails?

  - by yuval

  I have a static_controller that is in charge of all the static pages in the site and works as follows in routes.rb: map.connect ':id', :controller => 'static', :action => 'show' I have a static page called about that among other information, has a contact form. I currently have a contacts_controller that is in charge of inserting the contact information to the database. Inside my routes.rb file, I have: map.resources :contacts My contact form (simplified) looks like this: <% form_for @contact do |f| %> <p class="errors"><%= f.error_messages %></p> <p> <%= f.label :first_name %> <%= f.text_field :first_name %> </p> <p class="buttons"><%= f.submit %></p> <% end %> Which in turn submits to the create action of my contacts_controller. My create action looks like this: def create @contact = Contact.new(params[:contact]) if @contact.save flash[:notice] = "Email delivered successfully." end redirect_to "about" end The problem is, is the that when I redirect back to my about page the error_messages for the form get lost (since the error_messages for the form only exist for one request, and that request ends upon redirect). How would I go about preserving the error_messages and still linking the users back to the about static url? Would a session/flash be sufficient (if so, what code would I use to pass error messages) or am I going about this whole thing wrong? Thanks!

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