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  • What's the best way to detect web applications attacks ?

    - by paulgreg
    What is the best way to survey and detect bad users behavior or attacks like deny of services or exploits on my web app ? I know server's statistics (like Awstats) are very useful for that kind of purpose, specially to see 3XX, 4XX and 5XX errors (here's an Awstats example page) which are often bots or bad intentioned users that try well-known bad or malformed URLs. Is there others (and betters) ways to analyze and detect that kind of attack tentative ? Note : I'm speaking about URL based attacks, not attacks on server's component (like database or TCP/IP).

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  • Java: Netbeans debugging session works faster than normal run

    - by Martijn Courteaux
    Hello, I'm making Braid in Netbeans 6.7.1. Computer Spec: Windows 7 Running processes: 46 Running threads: +/- 650 NVidia GeForce 9200M GS Intel Core 2 Duo CPU P8400 @ 2.26Ghz Game-spec with normal run: Memory: between 80 MB and 110 MB CPU: between 9% and 20% CPU when time rewinding: 90% The same values for the debugging session, except when I rewind the time: CPU: 20%. Is there any reason for? Is there a way to reach the same performance with a normal run. This is my repaint code: @Override public void repaint() { BufferStrategy bs = getBufferStrategy(); // numBuffers: 4 Graphics g = bs.getDrawGraphics(); g.setColor(Color.BLACK); g.fillRect(-1, -1, 2000, 2000); gamePanel.paint(g.create(x, y, gameDim.width, gameDim.height)); bs.show(); g.dispose(); Toolkit.getDefaultToolkit().sync(); update(g); } The game runs in fullscreen (undecorated + frame.size = screensize) Martijn

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  • dev and prod systems in rails

    - by poseid
    What exactly is the difference in rails between dev and prod environments. When I develop an application in dev mode, do I have peformance problems, or others if I clone my dev environment on prod?

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  • Store html form on client or server while building?

    - by Brett
    Hi, I have a fairly complex html form enhanced via jquery. It has multiple tabs, within each one things like a html form builder, uploads, descriptions. There is lots of data, and as the user flicks around the various tabs I'm thinking of posting the data to the server. For example, the form builder, has about 10 properties for each field, as the user flicks between the various fields, an ajax request saves the current values, then loads a new set from the new field clicked on. When the user hits save, the idea is then on the server all these bits and pieces come together and become the live version (i may store them as a temp version while the user is working away). So I guess my question is, for complex forms where the same fields are re-used within the one form, does anyone attempt to save all this data locally and upload it in one hit or do most of you do little ajax post's and compile it all when the final save button is hit? b

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  • Why does the ID of Google's OpenID implementation change?

    - by Andrea
    I'm trying to implement OpenId login for a web application. Whenever new user who logs in via OpenId I create a new user on the sustem, and among the data I store their openid URL, so that next time they login with that user. I'm testing this with my Gmail OpenID, and the problem is that everytime I do this, Google sends a different openid URL, that is, https://www.google.com/accounts/o8/id?id=SomethingThatChangesFromTimeToTime Of course I'm then not able to tell wheter this is or not a new user. I'm a bit puzzled: shouldn't the openid identifier always remain the same?

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  • AutoCompleteTextView showing suggestions only for the first word entered

    - by DixieFlatline
    Hello! My autocompletetextview shows suggestions only for the first entered word. So if i write "ki" suggestions for king will popup. But if i enter "queen whitespace ki" there will be no suggestion for king. textView = (AutoCompleteTextView) findViewById(R.id.predlogi); String[] pred = getResources().getStringArray(R.array.predlogi); ArrayAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, pred); textView.setAdapter(adapter); textView.setThreshold(2); Is there any property that should be set to textView?

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  • How do you handle browser cache with login/logout?

    - by Julien
    To improve performances, I'd like to add a fairly long Cache-Control (up to 30 minutes) to each page since they do not change often. However, each page also displays the name of the user logged in (like this website). The problem is when the user logs in or logs out: the user name must change. How can I change the user name after each login/logout action while keeping a long Cache-Control? Here are the solutions I can think of: Ajax request (not cached) to retrieve and display the user name. If I have 2 requests (/user?registered and /user?new), they could be cached as well. But I am afraid this extra request would nullify my caching performance-wise Add a unique URL variable (?time=) to make the URL different, and cancel the cache. However, I would have to add this variable to all links on my webpage, not very convenient code-wise This problems becomes greater if I actually have more content that is not the same for registered users and new users.

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  • ASP.NET configure data source is not returning anything?

    - by Greg McNulty
    I'm selecting table data of the current user: SELECT [ConfidenceLevel], [LoveLevel], [HappinessLevel] FROM [UserData] WHERE ([UserProfileID] = @UserProfileID) I have set a control to the unique user ID and it is getting the correct value: HTML: <asp:Label ID="userID" runat="server" Text="Labeluser"></asp:Label> C#: userID.Text = Membership.GetUser().ProviderUserKey.ToString(); I then use it in the where clause using the Configure Data Source window unique ID = control then controlID userID (fills in .text for me) I compile and run but nothing shows up where the table should be. Any suggestions? Here is the code it has created: <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"> <Columns> <asp:BoundField DataField="ConfidenceLevel" HeaderText="ConfidenceLevel" SortExpression="ConfidenceLevel" /> <asp:BoundField DataField="LoveLevel" HeaderText="LoveLevel" SortExpression="LoveLevel" /> <asp:BoundField DataField="HappinessLevel" HeaderText="HappinessLevel" SortExpression="HappinessLevel" /> </Columns> </asp:GridView> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionStringToDB %>" SelectCommand="SELECT [ConfidenceLevel], [LoveLevel], [HappinessLevel] FROM [UserData] WHERE ([UserProfileID] = @UserProfileID)"> <SelectParameters> <asp:ControlParameter ControlID="userID" Name="UserProfileID" PropertyName="Text" Type="Object" /> </SelectParameters> </asp:SqlDataSource>

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  • What should every programmer know?

    - by Matt Lacey
    Regardless of programming language(s) or operating system(s) used or the environment they develop for, what should every programmer know? Some background: I'm interested in becoming the best programmer I can. As part of this process I'm trying to understand what I don't know and would benefit me a lot if I did. While there are loads of lists around along the lines of "n things every [insert programming language] developer should know", I have yet to find anything similar which isn't limited to a specific language. I also expect this information to be of interest and benefit to others.

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  • Regexp that matches user-agents of end-user browsers but NOT crawlers with >90 % accuracy

    - by knorv
    I'm trying to construct a regexp that will evaluate to true for User-Agent:s of "browsers navigated by humans", but false for bots. Needless to say the matching will not be exact, but if it gets things right in say 90 % of cases that is more than good enough. My approach so far is to target the User-Agent string of the the five major desktop browsers (MSIE, Firefox, Chrome, Safari, Opera). Specifically I want the regexp NOT to match if the user-agent is a bot (Googlebot, msnbot, etc.). Currently I'm using the following regexp which appears to achieve the desired precision: ^(Mozilla.*(Gecko|KHTML|MSIE|Presto|Trident)|Opera).*$ I've observed small number of false negatives which are mostly mobile browsers. The exceptions all match: (BlackBerry|HTC|LG|MOT|Nokia|NOKIAN|PLAYSTATION|PSP|SAMSUNG|SonyEricsson) My question is: Given the desired accuracy level, how would you improve the regexp? Can you think of any major false positives or false negatives to the given regexp? Please note that the question is specifically about regexp-based User-Agent matching. There are a bunch of other approaches to solving this problem, but those are out of the scope of this question.

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  • What are suitable performance indicators for programmers?

    - by Graphain
    Hi, I am wondering what performance indicators people encounter, and think are realistic, for programmers in the workplace? I've seen numerous articles (I can't recall a really good one that I read right now) that detail how programmers will optimise for the metric they are being measured by (whether that be lines of code etc.). However, is there any metric that can be used as a good performance indicator of a programmer in the workplace, and conversely be used as a milestone by a programmer when negotiating with management? Replies Thanks for the link to that one and good feedback so far!

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  • Comparison of web template engines

    - by Mark
    Post a snippet of code from your favorite templating engine, with the name of the engine and a link to its homepage; show off its basic syntax and maybe some neat features about it that makes it unique. Hopefully this will give people an idea of what's out there and make it easier for them to decide on an engine.

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  • Updating multiple divs w/ RJS/AJAX

    - by bgadoci
    I am successfully using RJS to implement AJAX on a page.replace.html create.js.rjs. I am attempting to update two locations instead of one and after watching Ryan Bates Railscast I am very close (I think) but have a problem in the syntax of my /views/likes/create.js.rjs file. Here is the situation: located at /views/likes/create.js.rjs is the following code: page.replace_html "votes_#{ @site.id }", :partial => @like page.replace_html "counter", 10 - (@question.likes.count :conditions => {:user_id => current_user.id}) page[@like].visual_effect :highlight My problem lies in the second line. The div "counter" displays the following code in the /views/question/show.html.erb page: <div id="counter"> You have <%= 10 - (@question.likes.count :conditions => {:user_id => current_user.id}) %> votes remaining for this question </div> From watching the screen cast I believe that my error has to do w/ the syntax of the second line. Specifically he mentions that you cannot use a local instance variable but not sure how to make the change. Thoughts?

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  • How to include frameset under CGI.pm

    - by neversaint
    I want to have a cgi-script that does two things. Take the input from a form. Generate results base on the input values on a frame. Primarily I want the frame exist only after the results is generated/printed. Below is the simplified code of what I want to do. But somehow it doesn't work. What's the right way to do it? #!/usr/local/bin/perl use CGI ':standard'; print header; print start_html('A Simple Example'), h1('A Simple Example'), start_form, "What's your name? ",textfield('name'), p, "What's the combination?", p, checkbox_group(-name=>'words', -values=>['eenie','meenie','minie','moe'], -defaults=>['eenie','minie']), p, "What's your favorite color? ", popup_menu(-name=>'color', -values=>['red','green','blue','chartreuse']), p, submit, end_form, hr; if (param()) { # begin create the frame print <<EOF; <html><head><title>$TITLE</title></head> <frameset rows="10,90"> <frame src="$script_name/query" name="query"> <frame src="$script_name/response" name="response"> </frameset> EOF # Finish creating frame print "Your name is: ",em(param('name')), p, "The keywords are: ",em(join(", ",param('words'))), p, "Your favorite color is: ",em(param('color')), hr; } print end_html;

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  • How long can a URL be?

    - by Spines
    How long can a URL be? I want to pass a lot of data through the query string. I think I remember that it depends on what different routers it passes through, but how long can the URL be and definitely not get truncated?

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  • [C#][XNA 3.1] How can I host two different XNA windows inside one Windows Form?

    - by secutos
    I am making a Map Editor for a 2D tile-based game. I would like to host two XNA controls inside the Windows Form - the first to render the map; the second to render the tileset. I used the code here to make the XNA control host inside the Windows Form. This all works very well - as long as there is only one XNA control inside the Windows Form. But I need two - one for the map; the second for the tileset. How can I run two XNA controls inside the Windows Form? While googling, I came across the terms "swap chain" and "multiple viewports", but I can't understand them and would appreciate support. Just as a side note, I know the XNA control example was designed so that even if you ran 100 XNA controls, they would all share the same GraphicsDevice - essentially, all 100 XNA controls would share the same screen. I tried modifying the code to instantiate a new GraphicsDevice for each XNA control, but the rest of the code doesn't work. The code is a bit long to post, so I won't post it unless someone needs it to be able to help me. Thanks in advance.

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  • What should be the considerations for choosing SQL/NoSQL?

    - by Yuval A
    Target application is a medium-sized website built to support several hundred-thousand users an hour, with an option to scale above that. Data model is rather simple, and caching potential is pretty high (~10:1 ratio of read to edit actions). What should be the considerations when coming to choose between a relational, SQL-based datastore to a NoSQL option (such as HBase and Cassandra)?

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  • What is a programmer's life like?

    - by Zee JollyRoger
    Imagine like an 8-hour long video of any "typical/average" programming job. What is it like? Before I get myself involved in that path, what can I expect? I am interested in gathering first-hand information and accounts of the typical life of a programmer. My goal is to grasp the fundamental concepts of working in the professional field of programming. I just want to "see" into what it is/means to come to an entry-level programming job and program. See what kind of skills, mentality, expectations, and such are required.

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  • How to disable mod_security2 rule (false positive) for one domain on centos 5

    - by nicholas.alipaz
    Hi I have mod_security enabled on a centos5 server and one of the rules is keeping a user from posting some text on a form. The text is legitimate but it has the words 'create' and an html <table> tag later in it so it is causing a false positive. The error I am receiving is below: [Sun Apr 25 20:36:53 2010] [error] [client 76.171.171.xxx] ModSecurity: Access denied with code 500 (phase 2). Pattern match "((alter|create|drop)[[:space:]]+(column|database|procedure|table)|delete[[:space:]]+from|update.+set.+=)" at ARGS:body. [file "/usr/local/apache/conf/modsec2.user.conf"] [line "352"] [id "300015"] [rev "1"] [msg "Generic SQL injection protection"] [severity "CRITICAL"] [hostname "www.mysite.com"] [uri "/node/181/edit"] [unique_id "@TaVDEWnlusAABQv9@oAAAAD"] and here is /usr/local/apache/conf/modsec2.user.conf (line 352) #Generic SQL sigs SecRule ARGS "((alter|create|drop)[[:space:]]+(column|database|procedure|table)|delete[[:space:]]+from|update.+set.+=)" "id:1,rev:1,severity:2,msg:'Generic SQL injection protection'" The questions I have are: What should I do to "whitelist" or allow this rule to get through? What file do I create and where? How should I alter this rule? Can I set it to only be allowed for the one domain, since it is the only one having the issue on this dedicated server or is there a better way to exclude table tags perhaps? Thanks guys

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  • How to share memory buffer across sessions in Django?

    - by afriza
    I want to have one party (or more) sends a stream of data via HTTP request(s). Other parties will be able to receive the same stream of data in almost real-time. The data stream should be accessible across sessions (according to access control list). How can I do this in Django? If possible I would like to avoid database access and use in memory buffer (along with some synchronization mechanism)

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  • How do emulators work and how are they written?

    - by Simucal
    How do emulators work? When I see NES / SNES or C64 emulators, it astounds me. Do you have to emulate the processor of those machines by interpreting it's particular assembly instructions? What else goes into it? How are they typically designed? Can you give any advice for someone interested in writing an emulator (particularly a game system)?

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