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  • Getting started with open source

    - by lola
    Hi all, I'm an undergraduate who has decided that he wants to join the open source community and contribute. However, I have come to think that, once you have chosen an open source project, a lot of time is spent in learning the nitty gritties of that project in addition to stuff like subversion,etc which a typical undergraduate isn't exposed to. So, you have to stick with that project for a long time, say a year or two, before moving on to other projects. In this case, choosing the right(for you) initial project is very important since if you choose one,and say, the development in your field of interest(in that project) is a low priority and not exciting enough, you'll lose interest and stop contributing to open source all together. So what I wanted to know was, since there are thousands of open source projects, is all this being documented somewhere with tags,etc so that a beginner can choose his projects. The GSoc 2010 ideas list is a great starting point, but it only covers a handful. Hence, I thought why not ask this at stackoverflow: if you have any pointers as to where to start, when choosing a FOSS project or any other tips related to starting with FOSS. P.S. I'm interested in projects involving mobile ad hoc networks(those using TinyOS, preferably), so pointers related to these will be great. I'm looking through Freifunk and OLPC as of now, needed more ideas.

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  • Aspect-oriented Programming and Code Contracts in ASP.NET MVC

    There are some aspects to application programming, such as logging, tracing, profiling, authentication and authorization that cut across the business objects. These are difficult to deal with in an object-oriented paradigm without resorting to code-injection, code-duplication or interdependencies. In ASP.NET MVC, you can use attributes in the form of action filters to provide a neater way of implementing these cross-curring concerns.

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  • boost.asio error on read from socket.

    - by niXman
    The following code of the client: typedef boost::array<char, 10> header_packet; header_packet header; boost::system::error_code error; ... /** send header */ boost::asio::write( _socket, boost::asio::buffer(header, header.size()), boost::asio::transfer_all(), error ); /** send body */ boost::asio::write( _socket, boost::asio::buffer(buffer, buffer.length()), boost::asio::transfer_all(), error ); of the server: struct header { boost::uint32_t header_length; boost::uint32_t id; boost::uint32_t body_length; }; static header unpack_header(const header_packet& data) { header hdr; sscanf(data.data(), "%02d%04d%04d", &hdr.header_length, &hdr.id, &hdr.body_length); return hdr; } void connection::start() { boost::asio::async_read( _socket, boost::asio::buffer(_header, _header.size()), boost::bind( &connection::read_header_handler, shared_from_this(), boost::asio::placeholders::error ) ); } /***************************************************************************/ void connection::read_header_handler(const boost::system::error_code& e) { if ( !e ) { std::cout << "readed header: " << _header.c_array() << std::endl; std::cout << constants::unpack_header(_header); boost::asio::async_read( _socket, boost::asio::buffer(_body, constants::unpack_header(_header).body_length), boost::bind( &connection::read_body_handler, shared_from_this(), boost::asio::placeholders::error ) ); } else { /** report error */ std::cout << "read header finished with error: " << e.message() << std::endl; } } /***************************************************************************/ void connection::read_body_handler(const boost::system::error_code& e) { if ( !e ) { std::cout << "readed body: " << _body.c_array() << std::endl; start(); } else { /** report error */ std::cout << "read body finished with error: " << e.message() << std::endl; } } On the server side the method read_header_handler() is called, but the method read_body_handler() is never called. Though the client has written down the data in a socket. The header is readed and decoded successfully. What's the error?

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  • Issue reading in a cell from Excel with Apache POI

    - by Nick
    I am trying to use Apache POI to read in old (pre-2007 and XLS) Excel files. My program goes to the end of the rows and iterates back up until it finds something that's not either null or empty. Then it iterates back up a few times and grabs those cells. This program works just fine reading in XLSX and XLS files made in Office 2010. I get the following error message: Exception in thread "main" java.lang.NumberFormatException: empty String at sun.misc.FloatingDecimal.readJavaFormatString(Unknown Source) at java.lang.Double.parseDouble(Unknown Source) at the line: num = Double.parseDouble(str); from the code: str = cell.toString(); if (str != "" || str != null) { System.out.println("Cell is a string"); num = Double.parseDouble(str); } else { System.out.println("Cell is numeric."); num = cell.getNumericCellValue(); } where the cell is the last cell in the document that's not empty or null. When I try to print the first cell that's not empty or null, it prints nothing, so I think I'm not accessing it correctly.

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  • Reading Email using Pop3 in C#

    - by Eldila
    I am looking for a method of reading emails using Pop3 in C# 2.0. Currently, I am using code found in CodeProject. However, this solution is less than ideal. The biggest problem is that it doesn't support emails written in unicode.

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  • Is there a good way to wrap an existing Python based web application to require a login?

    - by Jonathan B
    I'm in the process of installing an open-source Python based web application to an internal server here at work. The existing code is open - it doesn't require a login to view it - but one of the requirements is that users have to be approved before they can see anything. Is there a good way (using Apache configuration files for example, but any method would be great) to wrap the application so that any access requires a login? I would like to avoid modifying the open-source code (a maintenance nightmare every time a new release comes out). Any thoughts or suggestions?

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  • Google présente son dernier prototype de voiture autonome, lors de la conférence Code

    Google présente son dernier prototype de voiture autonome lors de la conférence Code Décidément la conférence Code réserve bien des surprises. Après Microsoft et son prototype de traduction de conversations Skype, c'est Google qui a dévoilé un prototype d'une voiture électrique aux formes arrondies qui sera entièrement pilotée par ordinateur. D'ailleurs, comme l'explique Chris Urmson, le directeur du projet Self-Driving Car, « le prototype n'a pas d'embrayage, pas de pédale d'accélérateur, pas...

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  • Visual Studio Code Analysis - Does Microsoft follow it themselves?

    - by Oskar Kjellin
    Did a quick search but could not find anything about this. I guess all of you know that the Visual Studio Code Analysis is quite nitpicking and gives warnings about a lot of things. Does anybody know how well Microsoft follow this themselves..? That is, if I were to run a code analysis on their assemblies, would the warnings be none or very few (perhaps surpress warning with a justification..?).

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  • Open-sourcing a web site with active users?

    - by Lars Yencken
    I currently run several research-related web-sites with active users, and these sites use some personally identifying information about these users (their email address, IP address, and query history). Ideally I'd release the code to these sites as open source, so that other people could easily run similar sites, and more importantly scrutinise and replicate my work, but I haven't been comfortable doing so, since I'm unsure of the security implications. For example, I wouldn't want my users' details to be accessed or distributed by a third party who found some flaw in my site, something which might be easy to do with full source access. I've tried going half-way by refactoring the (Django) site into more independent modules, and releasing those, but this is very time consuming, and in practice I've never gotten around to releasing enough that a third party can replicate the site(s) easily. I also feel that maybe I'm kidding myself, and that this process is really no different to releasing the full source. What would you recommend in cases like this? Would you open-source the site and take the risk? As an alternative, would you advertise the source as "available upon request" to other researchers, so that you at least know who has the code? Or would you just apologise to them and keep it closed in order to protect users?

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  • C# Reading the registry and Wow6432Node key

    - by Jade M
    Hi all, I have come code that reads the registry and looks for a value in HKEY_LOCAL_MACHINE\Software\App\ but when running on 64bit versions of Windows the value is under HKEY_LOCAL_MACHINE\Software\Wow6432Node\App. How should I best approach this? Do I need a 64bit installer or should I rewrite my code to detect both places? Thanks

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  • problem with reading arabic in jsp page?

    - by sword101
    Hey there i have a column in the databsePostgreSQL which contains arabic data when reading the data from the database in the controller it's read fine, encoding is good but when sending the data to the jsp page and trying to read it it appears something like ????????? any ideas why something like this occur?

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  • Adding JavaScript to your code dependent upon conditions

    - by DavidMadden
    You might be in an environment where you code is source controlled and where you might have build options to different environments.  I recently encountered this where the same code, built on different configurations, would have the website at a different URL.  If you are working with ASP.NET as I am you will have to do something a bit crazy but worth while.  If someone has a more efficient solution please share. Here is what I came up with to make sure the client side script was placed into the HEAD element for the Google Analytics script.  GA wants to be the last in the HEAD element so if you are doing others in the Page_Load then you should do theirs last. The settings object below is an instance of a class that holds information I collection.  You could read from different sources depending on where you stored your unique ID for Google Analytics. *** This has been formatted to fit this screen. *** if (!IsPostBack) { if (settings.GoogleAnalyticsID != null || settings.GoogleAnalyticsID != string.Empty) { string str = @"//<!CDATA[ var _gaq = _gaq || []; _gaq.push(['_setAccount', '"  + settings.GoogleAnalyticsID + "']); _gaq.push(['_trackPageview']);  (function () {  var ga = document.createElement('script');  ga.type = 'text/javascript';  ga.async = true;  ga.src = ('https:' == document.location.protocol  ? 'https://ssl' :  'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0];  s.parentNode.insertBefore(ga, s);})();"; System.Web.UI.HtmlControls.HtmlGenericControl si =  new System.Web.UI.HtmlControls.HtmlGenericControl(); si.TagName = "script"; si.Attributes.Add("type", @"text/javascript"); si.InnerHtml = sb.ToString(); this.Page.Header.Controls.Add(si); } } The code above will prevent the code from executing if it is a PostBack and then if the ID was not able to be read or something caused the settings to be lost by accident. If you have larger function to declare, you can use a StringBuilder to separate the lines. This is the most compact I wished to go and manage readability.

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  • Integration Services Throws an Error Reading Access 2007 Table

    - by Eric Flamm
    [Participant Table [1994]] Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "I:\My Documents\Flamm Consulting\Migrations.accdb" failed with error code 0xC0209303. There may be error messages posted before this with more information on why the AcquireConnection method call failed. Frankly, I'm confused about how SSIS should connect to Access 2007 - the UI just isn't very friendly - there's no file browser, for example. I'm wondering if there's something wrong with my install - missing drivers, etc.

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  • Best way to protect website application code

    - by Gaz_Edge
    Background I have a web application that I host on my own server. I have clients who use the application as is, but some have asked if they can host the application on their own server. This enables them to have their own URLS rather than mine. The application only forms part of their website so I'm assuming it will not be possible for my server to respond to a direct call to their domain etc To give some examples, i currently have urls like www.mydomain.com/profile, www.mydomain.com/index.php?option=someoption&view=someview&id=1 What my clients' want is www.theirdomian.com/profile, www.theirdomian.com/index.php?option=someoption&view=someview&id=1 etc Question My question is, what is the best way for me to allow them to use their own URLs with my application, without giving them all the backend source code and databases to install on their server? One way I thought would be to create a router.php file that sits on their server. The router then asks my server to output the html. The router modifies all the links etc in the html source and outputs the new html through the clients server. When a link is clicked on the clients site, the router receives the request and modifies the url to get the data from my server etc. Is this an effective way to achieve what I want, or is it way off the mark.

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  • Reading barcodes from Java

    - by santiagobasulto
    Hello everyone. I'm dealing with a barcode reader in my java app. The problem is that the barcode, before and after reading and sending the actual barcode, sends a return code. I've some JTextFields and when the reader reads the barcode it change the focus, and then sends another return that makes the window to close. Is it anyway to "intercept" those "return" commands ?

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  • Require further reading on Custom Installers in .Net?

    - by IbrarMumtaz
    Anybody got any good reading articles and tutorials on custom installers as most on the web seem to be outdated? The MS e-book for the 70-536 exam covers this but very lightly, as it does not cover the use of the ServiceProcessInstaller class or something like that??? I'm mentioning this here because I have seen this on quite a few exams.

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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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