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  • How to secure images with Rails?

    - by NotDan
    I have a gallery in my rails app that needs to only allow certain images to be shown to specific, logged in users. I am using Paperclip for image processing now, but it saves all images in a public folder available to anyone. Note that I don't have to use Paperclip if there is a better way, and I already have the login system in place. I just need a way to place the images in a non-public location, but still be able to serve them as needed. Is it possible to only allow these images to be served to authenticated users?

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  • AJAX form sections - how to pass url of next stage of form

    - by dan727
    Hi, I've got a multi-part form (in a PHP MVC setup) which I have working correctly without javascript enhancement. I'm starting to add the AJAX form handling code which will handle each stage of a form submission, validating/saving data etc, before using AJAX to load the next stage of the form. I'm wondering how best to pass the URL of the next stage to the current form being processed, so that my jQuery form handling code can process the current form, then load the next part via AJAX. The form "action" is different from what the url of the next stage of the form is - what do you think would be good practice here? I was thinking about either appending the url of the next stage to the form action url, via a query string - then just use javascript to extract this url when the form is successfully processed. The other option is via a hidden form element. Not sure what other client side options I have here Any thoughts?

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  • Java side scrolling game on android

    - by hanesjw
    I'm trying to make an easy side scrolling game just to learn the ropes of game programming on android. I came up with a solution of how to make it but I don't really think it is the most elegant solution. I wanted to get some different ideas on how to implement my game, as I really have no other solution right now. Here is a quick explanation of how it works.. I basically have blocks or objects fall from the top of the screen. The blocks are defined from a pre-defined string I create using a custom 'map-editor'. I create all the blocks at compile time, position them on or off the screen and simply increment their coordinates with each iteration of the gameloop. It is actually done a little bit better then that, but that gives a short easy explanation on the basic idea. I heard from a few people that instead of incrementing each block position, have the blocks stay there and simply change the viewable area. That makes sense, but I have no idea how to do it. Can anyone share some ideas or links on how I can implement something like this? I know my current solution isn't the greatest. Thanks!

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  • Which method should I use to give the perception the computer is thinking in programming?

    - by Roy
    I want to create a simple game like tic tac toe where the human user is playing against the computer. The computer function takes a couple of milliseconds to run but I would like to make the computer take 5 seconds to make a move. Which method should I use? 1) Create two memory threads. One for the computer and one for the human user. When the computer is taking 5 seconds to imitate thinking, the human user thread is paused for 5 seconds. 2) Disable input devices for 5 seconds using timer or dispatchertimer 3) Any better methods you can think of Thanks!

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  • How do I fix "java.lang.OutOfMemoryError at sun.misc.Unsafe.allocateMemory(Native Method)"?

    - by Jephir
    I'm making a Java application that uses the Slick library to load images. However, on some computers, I get this error when trying to run the program: Exception in thread "main" java.lang.OutOfMemoryError at sun.misc.Unsafe.allocateMemory(Native Method) at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:99) at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:288) at org.lwjgl.BufferUtils.createByteBuffer(BufferUtils.java:60) at org.newdawn.slick.opengl.PNGImageData.loadImage(PNGImageData.java:692) at org.newdawn.slick.opengl.CompositeImageData.loadImage(CompositeImageData.java:62) at org.newdawn.slick.opengl.CompositeImageData.loadImage(CompositeImageData.java:43) My VM options are: -Djava.library.path=lib -Xms1024M -Xmx1024M -XX:PermSize=256M -XX:MaxPermSize=256M The program loads a few large images (1024 x 768 resolution) at the beginning. Any help to solve this problem would be greatly appreciated.

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  • What are the best ways to scale small business applications ?

    - by Rachel
    I have one small online sale business but I want to make it scalable at limited expense and so am looking out at various services which can help me make my business scalable. I was looking into Amazon Web Services and it seems to be a viable option. Are there any other ways for adding scalability to small online businesses ?

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  • Statistical analysis on large data set to be published on the web

    - by dassouki
    I have a non-computer related data logger, that collects data from the field. This data is stored as text files, and I manually lump the files together and organize them. The current format is through a csv file per year per logger. Each file is around 4,000,000 lines x 7 loggers x 5 years = a lot of data. some of the data is organized as bins item_type, item_class, item_dimension_class, and other data is more unique, such as item_weight, item_color, date_collected, and so on ... Currently, I do statistical analysis on the data using a python/numpy/matplotlib program I wrote. It works fine, but the problem is, I'm the only one who can use it, since it and the data live on my computer. I'd like to publish the data on the web using a postgres db; however, I need to find or implement a statistical tool that'll take a large postgres table, and return statistical results within an adequate time frame. I'm not familiar with python for the web; however, I'm proficient with PHP on the web side, and python on the offline side. users should be allowed to create their own histograms, data analysis. For example, a user can search for all items that are blue shipped between week x and week y, while another user can search for sort the weight distribution of all items by hour for all year long. I was thinking of creating and indexing my own statistical tools, or automate the process somehow to emulate most queries. This seemed inefficient. I'm looking forward to hearing your ideas Thanks

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  • Cross platform millisecond timer lasting more than 49 days?

    - by Cetra
    Hey guys, I'm going to be developing a small dedicated server in C/C++ that will require uptime of forever. I've been looking into some time functions as millisecond timing is required for calculations. I have 2 problems that I'm facing: Using a 32bit integer to store the number of milliseconds since the operation began will wrap around at about the 49 days mark resetting to zero. There doesn't seem to be any standard system calls for getting elapsed milliseconds that are platform independant What should I do to resolve both these issues?

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  • Reading cookie problem across directories

    - by Etienne
    This is my JavaScript code I use to create my cookie............ document.cookie = "Name=" + Name + ";expires=Friday, 31-Dec-2011 12:00:00 GMT; path/"; I create it in www.example.com/folder/file.html and it works. But I cant read the cookie from www.example.com/index.html or www.example.com/folder2/file2.html. What is wrong with my code? Thanks in advanced

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  • Get information from PayPal after a transaction

    - by user146780
    I want to create a simple transaction on my Web Site where after the person's transaction completes, I want paypal to redirect the user to go to a place on my site and I want PayPal to provide me with details so I can use PHP to parse it and email them the link to their purchase. I'm not sure what notify_url does? Thanks

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  • Help with interesting VS2010 and SQL2008 bug

    - by user355770
    Hey So im using Visual Studio 2010 to create a webpage. im calling some tabels from sql server 2008 here is where im confused... The code runs fine no errors. The pages works except im missing my rows in my 3rd column from the table. Everything else shows up. Ive checked to make sure the names are matching everywhere and that in sql the joins and such worked. Its just very weird that i'd be missing my 2 rows from the 3rd column. anyone have any ideas to help?? the error is in the tab called research material else if (tabTagId == "tpArlington_ProjectInformation") { repArlington_ProjectInformation.DataSource = ds; repArlington_ProjectInformation.DataBind(); } else if (tabTagId == "tpArlington_Plan") { repArlington_Plan.DataSource = ds; repArlington_Plan.DataBind(); } else if (tabTagId == "tpArlington_ResearchMaterial") { repArlington_ResearchMaterial.DataSource = ds; repArlington_ResearchMaterial.DataBind(); } else if (Session["projectAbbreviation"].ToString() == "ARLING") { tpArlington_ProjectInformation.HeaderText = "Project Information"; tpArlington_ProjectInformation.Visible = true; tpArlington_Plan.HeaderText = "Plan"; tpArlington_Plan.Visible = true; tpArlington_ResearchMaterial.HeaderText = "ResearchMaterial"; tpArlington_ResearchMaterial.Visible = true; getTabData("tpArlington_ProjectInformation"); getTabData("tpArlington_Plan"); getTabData("tpArlington_ReasearchMaterial"); } the 2 other tabs work perfect. the research material is where the problem is. the stuff in the tab doesn't come up. the text in the tab DOES come up but not the stuff from sql. the stuff in sql looks good, the ids match and everything is joined properly otherwise the other 2 tabs wouldnt work. that is what is confusing me. any suggestions or specific info you need just ask. thanks!

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  • Finding out event that called a CGI script

    - by Acorn
    What I want is to be able to make my CGI script do different things depending on what action initiated the calling of the script. For example, if one button is pressed, a database is cleared. If another button is pressed, a form is submitted and that data is added to the database. Should I be doing something like adding the name of the form/button to the end of the POST data submitted in jQuery and then .poping it off in the script? Or is there some other data that's already sent in the POST that I could get from FieldStorage that would give me the information I need to decide what the script should do when it's called? And what if I wasn't using javascript? Would I have to have a hidden field that gets submitted with the name of the form/button? Or is it best to use a different target script for each button on a page?

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  • Web script to click some buttons and save some html pages

    - by Serge
    I am trying to go through a site with a bunch of links. I click on a link, save the page, click on a button, save a page. Then go back and repeat it for a huge number of links. I want to write a script to do that for me. I know C++ but I want to do Javascript for this, what is a good place to get me started? What would be a good IDE to use?

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  • Limiting JMS Destination Instances

    - by jumponadoughnut
    Is it possible to limit the number of JMS receiver instances to a single instance? I.e. only process a single message from a queue at any one time? The reason I ask is because I have a fairly intensive render type process to run for each message (potentially many thousands). I'd like to limit the execution of this code to a single instance at a time. My application server is JBoss AS 6.0 Any help much appreciated

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  • PHP Include and accents (They show up as ?)

    - by user146780
    I'm using PHP include to include a PHP file that has HTML in it. some of the content has french accents and these show up as ? on the site. How can this be solved? Thanks Here is the PHP file I include: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html dir="ltr" xmlns="http://www.w3.org/1999/xhtml"> <head> <meta content="en-us" http-equiv="Content-Language" /> <title>Accueil</title> <meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> <meta content="Changement créativité rêve buts être centré Plénitude personnel Développement transformation Modification nouveauté avancement bien-être Nouvelle vision ressentis L’énergie positive satisfaction l’acceptation Pardon" name="keywords" /> <link href="masterstyles.css" rel="stylesheet" type="text/css" /> <link href="menustyles.css" rel="stylesheet" type="text/css" /> <link href="menudropdown.css" rel="stylesheet" type="text/css" /> <td class="tbsyles" >&nbsp; <h3 class="bigorange"> ACTIVITÉS À VENIR…</h3> <p class="horizblue"> </p> <p class="bigblack"> <br /> Inscrivez-vous à nos conférences et formations <br /> <br /> </p> <h4 class="orange"> Example of some text that could be here<br /> </h4> <p class="horizblue"> &nbsp;</p> <h3 class="bigorange"> <br /> ABONNEZ-VOUS… </h3> <p class="nopadding"> À notre liste d’envoi </p> <form method="post" action="<?php echo $PHP_SELF;?>"> <?PHP function process_info(){ if(isset($_POST['email'])) { $email=$_POST["email"]; $email=strtolower($email); $action = "subc"; // check if email exists // check whether email is correct (basic checking) $test1=strpos($email, "@"); //value must be >1 $test2=strpos(substr($email,strpos($email,"@")), "."); //value must be >1 $test3=strlen($email); //value must be >6 $test4=substr_count ($email,"@"); //value must be 1 if ($test1<2 or $test2<2 or $test3<7 or $test4!=1) { print "<h6>Il a une erreur avec vôtre email</h6>"; print "<h6>Aucune informations ont été envoyer</h6>"; } else { print "<h5>vôtre address est enregistrer, Merci </h5>"; //If they wanted to subsribe, do it... $file = "emaillist-666XXX.txt"; // lets try to get the content of the file if (file_exists($file)){ // If the file is already in the server, its content is pasted to variable $file_content $file_content=file_get_contents($file); } else{ // If the file does not exists, lets try to create it // In case file can not be created (probably due to problems with directory permissions), // the users is informed (the first user will be the webmaster, who must solve the problem). $cf = fopen($file, "w") or die(""); fclose($cf); } // IF REQUEST HAS BEEN TO SUBSCRIBE FROM MAILING LIST, ADD EMAIL TO THE FILE if ($action=="subc"){ // check whether the email is already registered if(strpos($file_content,"<$email>")>0){die("");} // write the email to the list (append it to the file) $cf = fopen($file, "a"); fputs($cf, "\n$email"); // new email is written to the file in a new line fclose($cf); } } } } process_info(); ?> &nbsp;<p class="nopadding">Votre Courriel</p> <input name="email" type="text" class="style3" /> <input name="Submit" type="submit" value="OK" /></form> <p class="horizblue"></p> <h3 class="bigorange"> <br /> OUTILS GRATUIT… </h3> <p class="nopadding">Amusez-vous avec des outils intéressants</p> </td>

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  • Can someone explain an Enterprise Service Bus to me in non-buzzspeak?

    - by Jason Baker
    Some of our partners are telling us that our software needs to interact with an Enterprise Service Bus. After researching this a bit, my instinct is to say that this is just buzz speak for saying that we need to have a platform-indpendent way to pass messages back and forth. I'm just trying to get a feel for what our partners are telling us. Am I correct in dismissing our partners' request as just trying to get our software to be more buzzword-compliant, or are they telling us something we should listen to (even if encoded in buzzspeak)?

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  • Android dev time vs iPhone dev time

    - by Daniel Benedykt
    Hi IF someone has to develop the same application for Android and iPhone, is it more difficult to develop in one platform than on the other? Does it take more time? Lets think about the average app. Lists, text , buttons, fetch information from the internet. Thanks

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  • javascript and css loadings

    - by Mike
    I was wondering, If I have, let's say 6 javascripts includes on a page and 4-5 css includes as well on the same page, does it actually makes it optimal for the page to load if I do create one file or perhaps two and append them all together instead of having bunch of them?

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  • amp is included in url struts tag

    - by lakshmanan
    Hi, In my web application, I use strust2 url tag to pass parameters like id etc., For example, I use a link to delete an entity and I use param to pass the id of the entity to be deleted. And I follow this throughout my web app for adding, editing, deleting an entity. During run time, sometimes, I don't get the params to be stored in my action's bean properties. When I see the link that is generated, I get something like <a href='/projit1/p/discuss/viewDiscussion.action?d=11&amp;amp;amp;projid=11&amp;amp;disid=4'> What are these amps for ? why do they sit in between the action calls (made by link via url tag actions ) ? By the time I traverse back and forth in my web app, I get 10s and 20s of amp sitting in the request URL. What is the problem here ? Please help.

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  • what factors should a fresher(for programmer job) consider and learn before saying yes to employer f

    - by Senthil
    what factors should a fresher(for programmer job) consider and learn before saying yes to employer for job offer? and to contract? and most importantly how should one get the details?how can I approach them? I know some employers dont want to give such details..right? I have shortlisted by a Software COmpany..that is parter with microsoft. and works on technology like VB ADO.DOTNET,and some other reporting stuffs.,sql servers etc.,Tell me about scope of that..because They are asking me to sign for 2 year certificate bond agreement..I want to be a great programmer and Project Leader after 5 years..advise me guys..Language/OS not problem for me,As I curious to learn more things. Most of the SO members are programmers..so yours advice is greatly appreciated

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  • Tired of Exploring

    - by Abhi
    Dear All I am tired of my work. I am exploring all day and at the end of the day i feel that i have not gain anything. Its been 1 year & 3 month working in Wince 6.0 r3 but i feel that i have gained nothing. I feel like that i have wasted these month without doing anything. At fast i worked in GUI application in which i was gaining confidence but then i was shifted from that domain to something for which lot of knowledge is required i.e writing or adjusting BSP. Now at present i have shifted to work on silverlight which is again a new domain for me. My day starts from 10am and ends at 7pm @ office by doing nothing. I am tired completely. Can anyone help me what shall i do in this situation? How shall i start to achieve the target? Where should i stick "deadline" or "learning the target first" as deadline is also important? I am completely depressed.

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  • How To Collapse Just One Field in Django Admin?

    - by Apreche
    The django admin allows you to specify fieldsets. You properly structure a tuple that groups different fields together. You can also specify classes for certain groups of fields. One of those classes is collapse, which will hide the field under a collapsable area. This is good for hiding rarely used or advanced fields to keep the UI clean. However, I have a situation where I want to hide just one lonesome field on many different apps. This will be a lot of typing to create a full fieldset specification in every admin.py file just to put one field into the collapsed area. It also creates a difficult maintenance situation because I will have to edit the fieldset every time I edit the associated model. I can easily exclude the field entirely using the exclude option. I want something similar for collapse. Is this possible?

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