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  • C#: How to Make it Harder for Hacker/Cracker to Get Around or Bypass the Licensing Check?

    - by Peter Lee
    Hi all, Suppose that the user has saved the License file under the Application.StartupPath, where all users can read. And then, every time when the app starts, it will check if it can find and verify the license file. If the app can find and verify, we let the user to continue with full functinalities. If not, we prompt a MessageBox showing "Unlicencsed, continue to use with trial version, functionalities limited." My question is, if I'm a hacker/cracker, I would try to get around or bypass the licensing check instead of cracking the license file, because, if we use RSA signature, it's very difficult to crack a license file. So where should we put the license check? thanks. Merry Christmas and Happy New Year! Peter P.S.: and also, is it safe if I put a global variable IsLicensed (true / false) to limit the functionalities? Is it easy for a hacker to change IsLicensed = true?

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  • ANTLR, optional ';' in JavaScript

    - by vava
    I'm just playing with ANTLR and decided to try parsing JavaScript with it. But I hit the wall in dealing with optional ';' in it, where statement end is marked by newline instead. Can it be done in some straightforward way? Just a simple grammar example that doesn't work grammar optional_newline; def : statements ; statements : statement (statement)* ; statement : expression (';' | '\n') ; expression : ID | INT | 'var' ID '=' INT ; ID : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_')* ; INT : '0'..'9'+ ; WS : ( ' ' | '\t' | '\r' | '\n') {$channel=HIDDEN;} ; and I want to be able to parse this (which can be parsed by JavaScript parsers) var i = 10 10; PS: I don't want to put WS in parser rules, I would be much happier if lexer just get rid of those.

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  • problem with closing sockets

    - by Samantha
    Hi, I'm trying to write a client/server program with threads. I close the socket once the connexion is finished. The servers gets plenty of new connexions, and the socket number (file descriptor) increases very quickly: after 5 minutes running I was already at around file descriptor number 800! Is this a normal thing? Do threads share file descriptors? When I do close(sockfd); is the number released immediatly or after a some time? PS: I used to do with fork(), and I didn't have this issue. Thanks

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  • Batch files - number of command line arguments

    - by pyko
    Just converting some shell scripts into batch files and there is one thing I can't seem to find...and that is a simple count of the number of command line arguments. eg. if you have: myapp foo bar In Shell: $# - 2 $* - foo bar $0 - myapp $1 - foo $2 - bar In batch ?? - 2 <---- what command?! %* - foo bar %0 - myapp %1 - foo %2 - bar So I've looked around, and either I'm looking in the wrong spot or I'm blind, but I can't seem to find a way to get a count of number of command line arguments passed in. Is there a command similar to shell's "$#" for batch files? ps. the closest i've found is to iterate through the %1s and use 'shift', but I need to refernece %1,%2 etc later in the script so that's no good.

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  • How to redirect output away from /dev/null

    - by Gowtham
    I have an application that runs the a command as below: <command> >& /dev/null I have no control on this. All the o/p generated by this command goes to /dev/null. I want the output to be visible on screen or redirected to a log file. I tried to use freopen() and related functions to reopen /dev/null to another file, but could not get it working. Do you have any other ideas? Is this possible at all? Thanks for your time. PS: I am working on Linux. -Gowtham

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  • ASP.NET - ViewState: empty placeholder generates view state

    - by Budda
    On my web-page I have PlaceHolder, not controls are loaded into it. <asp:PlaceHolder ID="PlaceHolderStatMain" runat="server"> </asp:PlaceHolder> I am looking the ViewState generated for the page, it is the following: <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJLTg1NDkyNTUzD2QWAgIDD2QWAgIND2QWAmYPZBYCAgEPZBYCZg9kFgJmD2QWBmYPFQEYL3N0YXRfc3RhZGl1bS9sZWFndWVfV0VGZAIBDxUBGC9zdGF0X3N0YWRpdW0vbGVhZ3VlX0VFRmQCAg8VARgvc3RhdF9zdGFkaXVtL2xlYWd1ZV9GQ1VkZEuSBUr5LFL6WfCehNBJgjrq0GzwWCWN2qlU70V7LAAb" /> When I set EnableViewState to false: <asp:PlaceHolder ID="PlaceHolderStatMain" runat="server" EnableViewState="false"> </asp:PlaceHolder> The viewstate content was decreased significantly: <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUJLTg1NDkyNTUzZGTTn8Y28VwmpE/K7yPPkLFvhrqMdU8THijFW/BMFzk0tQ==" /> Question: how to remove 'useless' viewstate content without disabling viewstate for placeholder himself (I would like other control loaded into placeholder to has viewstate)? Is it possible at all? Any thought are welcome! P.S. I am using ASP.NET 4.0

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  • Visual Studio 2008 - formatting/control characters/marks

    - by AL
    Hi, I don't know what I did but somehow the IDE has started displaying a green dot whenever I press spacebar and a green arrowhead whenever I press TAB. The source has become littered with these characters all over and I am finding it very difficult to code in the presence of so many formatting marks. I have tried to search a solution on Google but couldn't perhaps enter the right keywords so haven't been able to fix the behavior. Is there any way I can stop VS2008 IDE from littering my source code with these green dots and arrowheads whenever I press spacebar/tab? I would be really thankful for this help. Thanks, -AL PS: Re-posting the question as I am new to this forum and probably couldn't see the email notification option earlier. My apologies for this inconvenience.

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  • jQuery - improve/reduce my ipod-style dropdown code! - challenge?

    - by aSeptik
    Hi all guys! by keeping inspiration from this http://www.filamentgroup.com/examples/menus/ipod.php i have maked my own from scratch cause i have needed this smarty dropdown solution for a client, but more lightweight & efficient! so with a good cup of coffe in my hand i have maked this DEMO: http://jsbin.com/ufuga SOURCE: http://jsbin.com/ufuga/edit since this is a proof o concept, whould be nice to know, before port this into a plugin, what you think about it! is good, bad or can be improved or reduced in size!? i'm glad to share this code with you and whould be nice if you want give me any feedback! ;-) PS: work perfectly in IE6+, Firefox, Chrome, Opera and of course support the jQuery Theme Roller and have zero configuration steps! thank you guys!

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  • How can I find the places of system calls of my program?

    - by Lucky Man
    From strace manual: -i Print the instruction pointer at the time of the system call. I straced my programm: strace -i prog As a result I got a lot of system calls. One of them: [000da49c] open("./rabbit.o", O_RDONLY) = 3 But disassembled instruction at this address of prog doesn't call any syscall (hte editor): da49c ! mov r7, ip What is wrong? How can I find the places of system calls of my program? P.S. Architecture of my device doesn't support GDB-command catch syscall.

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  • Eidetic memory: What magic numbers you still remember?

    - by Hao
    Long before you practice writing readable code, what "magic numbers" you still remember up to this day? here's some of my list: 72 80 75 77 13 32 27 - up down left right enter space escape 1 2 4 128 - blue green red blink 67h 33h 17h - interrupt for EMS, mouse, printer function AH 9, interrupt 21 alt+219 for block ASCII alt+164 ñ 90 NOP 13 10 carriage return, line feed ascii 1 and 2 face, ascii 3 heart. no not this heart: <3 :-) debug -o72,10 -o71,12 clears the BIOS password. I don't know what those numbers mean, it's like a trade secret that gets shared with each other during college days. ascii 7 sounds a beep P.S. Somehow, remembering some of these magic numbers can help you in some tech problems, your keyboard is broken, the office pal's keyboard doesn't have accented characters. An anecdote, during college, one of my friend asked me how to remove the newlines in his Word document. Not having used Word so much then, I somehow "intuitively" guessed to find ^013 and replace it with blank. Well it works :-)

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  • How to upload multiple files to a SharePoint List

    - by AboutDev
    I am trying to upload multiple files into a SharePoint LIST as attachments. (can't use Document Libraries). I'm trying to use jquery to accomplish this but I'd appreciate any help or advise you may have concerning how best to upload to a list. For instance, can multi-uploads be accomplished when creating a new item? If you have code or examples/url's I can refer to I would welcome that. Cheers. PS - I need to select multiple files to upload at one go too...I know you can do this with flash-uploaders but can this be done for ASP.NET and specifically for SharePoint?

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  • How to re-use a thread in Java ?

    - by David
    I am a building a console Sudoku Solver where the main objective is raw speed. I now have a ManagerThread that starts WorkerThreads to compute the neibhbors of each cell. So one WorkerThread is started for each cell right now. How can I re-use an existing thread that has completed its work? The Thread Pool Pattern seems to be the solution, but I don't understand what to do to prevent the thread from dying once its job has been completed. ps : I do not expect to gain much performance for this particular task, just want to experiment how multi-threading works before applying it to the more complex parts of the code. Thanks

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  • Any clever way to fix 'string or binary data would be truncated' warning with LINQ

    - by Simon_Weaver
    Is there a clever way to determine which field is causing 'string or binary data would be truncated' with LINQ. I've always ended up doing it manually by stepping through a debugger, but with a batch using 'SubmitChanges' I have to change my code to inserting a single row to find the culprit in a batch of rows. Am I missing something or in this day and age do I really have to still use a brute force method to find the problem. Please dont give me advice on avoiding this error in future (unless its something much cleverer than 'validate your data'). The source data is coming from a different system where I dont have full control anyway - plus I want to be lazy. PS. Does SQL Server 2008 actually tell me the field name. Please tell me it does! I'll upgrade!

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  • Telling between a "natural" HTTP 404 and a PHP Generated one

    - by JCOC611
    So I have a file that should never be accessed by a user directly, but included in another PHP file. If the file is called directly, it generates a HTTP Status 404 Not Found to trick a possible attacker that such file doesn't exist. However, if the hacker could tell that the 404 was generated by PHP or is not "natural" then the whole point of the header would be lost. So is it possible to tell whether the 404 was generated by the server naturally (because the file really doesn't exist) or by a PHP code? PS: I know this question might seem pretty weird lol

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  • How to close an oracle db connection from php on an apache server? I mean close instantly.

    - by Valentin Jacquemin
    Usually closing a connection is simply done by oci_clone($connection); or in a worse case when the php script ends the connection pass away. In my case however, I face a different behavior. If I access my application which uses PHP 5.2.8, Apache 2.2.11 and oci8 1.2.5, the connection is kept during several minutes. Actually it seems to: if I launch netstat -b I see that the process httpd.exe remains with the ESTABLISHED status on the database's URL during a while (a few minutes). Could someone enlighten me on that behavior? P.S. I do not use persistent connections.

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  • how to exploit vulnerability of php?

    - by Dr Deo
    i have never seen a buffer overflow exploit in live action. supporse I have found a server that seems to have vulnerabilities. Where can i get proof of the concept code preferably in c/c++ to exploit the vulnerability? eg i found this vulnerability Multiple directory traversal vulnerabilities in functions such as 'posix_access()', 'chdir()', 'ftok()' may allow a remote attacker to bypass 'safe_mode' restrictions. (CVE-2008-2665 and CVE-2008-2666). How can i get proof of concept code for educational purposes PS I am a student and my only desire is to learn

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  • Wordpress Template get_the_tags() help

    - by Andy
    Hi Guys, I am using this code to get the tags in my wordpress posts for a theme `<?php $posttags = get_the_tags(); if ($posttags) { foreach ($posttags as $tag) { $tagnames[count($tagnames)] = $tag->name; } $comma_separated_tagnames = implode(", ", $tagnames); print_r($comma_separated_tagnames); } ?>` The PROBLEM is that it is returning tags for "all posts" not just individual posts, and I think the problem is that if a post DOESNT have tags - it just inserts tags anyway. Can anyone help modify this so: It return tags only for a post - not all tags If there are no tags for a post, dont return anything ? Really appreciate any help P.S - Can check out here for the wordpress docs

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  • MySQL query cache vs caching result-sets in the application layer

    - by GetFree
    I'm running a php/mysql-driven website with a lot of visits and I'm considering the possibility of caching result-sets in shared memory in order to reduce database load. However, right now MySQL's query cache is enabled and it seems to be doing a pretty good job since if I disable query caching, the use of CPU jumps to 100% immediately. Given that situation, I dont know if caching result-sets (or even the generated HTML code) locally in shared memory with PHP will result in any noticeable performace improvement. Does anyone out there have any experience on this matter? PS: Please avoid suggesting heavy-artillery solutions like memcached. Right now I'm looking for simple solutions that dont require too much time to implement, deploy and maintain.

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  • Does JavaME and/or Proguard reorder assignments?

    - by chrisdew
    This is a simplified example - I have two threads: Can JavaME and/Proguard ever reorder the obX = ... statements, such that thread_B will have a null pointer exception at ob2.someMethod? thread_A: Object ob1 = null; Object ob2 = null; ... ob1 = something1; ob2 = something2; thread_B: if (ob2 != null) { ob1.someMethod(); ... } P.S. I do realise that synchronising these will avoid the issue. Synchronisation has both a performance overhead, and more importantly, a chance to introduce deadlock.

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  • Memcache won't flush or clear memory

    - by pedalpete
    I've been trying to clear my memcache as I'm noticing the storage taking up almost 30% of server memory when using ps -aux. So I ran the following php code. $memcache = new Memcache; $memcache-connect("localhost",11211); $memcache-flush(); print_r($memcache-getStats()); This results in the output of ( [pid] = 4936 [uptime] = 27318915 [time] = 1255318611 [version] = 1.2.2 [pointer_size] = 64 [rusage_user] = 9.659531 [rusage_system] = 49.770433 [curr_items] = 57864 [total_items] = 128246 [bytes] = 1931734247 [curr_connections] = 1 [total_connections] = 128488 [connection_structures] = 17 [cmd_get] = 170288 [cmd_set] = 128246 [get_hits] = 45464 [get_misses] = 124824 [evictions] = 1009 [bytes_read] = 5607431213 [bytes_written] = 1806543589 [limit_maxbytes] = 2147483648 [threads] = 1 ) This should be fairly basic, but clearly, I'm missing something.

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  • Register view_helper zf 1.10.3

    - by Alexandr
    I create my view helper it located in /library/My/View/helpers/SpecialPurpose.php the class name is My_View_Helper_SpecialPurpose it have public function specialPurpose() it return some HTML i register this path in bootstrap.php $view = Zend_Layout::getMvcInstance()-getView(); $view-addBasePath('/my/view/helpers',"My_View_Helper"); when i tring specialPurpose();? in any view .phtml it trow exeption Message: Plugin by name 'SpecialPurpose' was not found in the registry; used paths: My_View_Helper_Helper_: /my/view/helpers\helpers/ Zend_View_Helper_: Zend/View/Helper/;D:/WWW/zends/application/modules/default/views\helpers/ P.S I read many post in stackoverflow but not one solutions not helped If it possible weácan how do this task with bootstrap and application.ini zf version 1.10.3

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  • Synchronising local and remote DB

    - by nico
    Hi everyone, I have a general question about DB synchronisation. So, I'm developing a website locally (PHP + MySQL) and I would like to be able to synchronise at least the structure (and maybe the contents) of the two DB when one of the two is changed (normally I would change the local copy). Right now what I'm doing is to use mysqldump to dump the modified tables and then import them in the remote DB or do it by hand if the changes are minimal. However I find this tedious and error-prone. For the PHP I'm currently using Quanta+ which has the handy feature of finding files that have changed and just upload those. Is there something similar for MySQL? Otherwise how do you keep your DBs synchronised? Thanks nico PS: I'm sorry if this was already asked, I saw other questions that deal with similar topics, but couldn't really find an answer.

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  • Create Personalized Controls For Java ME

    - by Nathan Campos
    I'm starting to develop a eBook reader for mobile using Java ME, but for the control were the book will be shown I need a personalized control. For this I need to first know how to do one, to workaround with my needs. Then I need to know how can I do a personalized control as we do with Visual Basic. PS: I want to do a personalized TextBox, that in some parts can be in bold, italic, sublined, that supports topics(as the Edit, the MS-DOS Text Editor) and many other things that make a eBook better viewed than a simple plain text

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  • Template metaprogram converting type to unique number

    - by daramarak
    I just started playing with metaprogramming and I am working on different tasks just to explore the domain. One of these was to generate a unique integer and map it to type, like below: int myInt = TypeInt<AClass>::value; I want to know if this is at all possible, and in that case how. Because although I have learned much about exploring this subject I still have failed to come up with an answer. (P.S. A yes/no answer is much more gratifying than a c++ solution that doesn't use metaprogramming, as this is the domain that I am exploring)

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  • jQuery properties - problem

    - by Cristian Boariu
    Hi, I use this plugin: jQuery.i18n.properties I put this code: /* Do stuff when the DOM is ready */ jQuery(document).ready(loadMessage); /* * Add elements behaviours. */ function loadMessage() { jQuery("#customMessage").html("test"); jQuery.i18n.properties({ name:'up_mail_messages', path:'https://static.unifiedpost.com/apps/myup/customer/upmail/upmail_messages/', mode:'both', language:'en', callback: function() { var messageKey = 'up.mail.test'; //alert(eval(messageKey)); jQuery('#customMessage').html(jQuery.i18n.prop(messageKey)); } }); } I do not understand why, in the customeMessage div it prints out: [up.mail.test] instead of the value of it: up.mail.test=messages loaded from en Can anybody show me where i am wrong? I;ve spent about two hours on it without finding any clue... Many Thanks. Ps: here is the message file: https://static.unifiedpost.com/apps/myup/customer/upmail/upmail_messages/up_mail_messages_en.properties

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