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• Reading Character from Image

  - by Chinjoo

  I am working on an application which requires matching of numbers from a scanned image file to database entry and update the database with the match result. Say I have image- employee1.jpg. This image will have two two handwritten entries - Employee number and the amount to be paid to the employee. I have to read the employee number from the image and query the database for the that number, update the employee with the amount to be paid as got from the image. Both the employee number and amount to be paid are written inside two boxes at a specified place on the image. Is there any way to automate this. Basically I want a solution in .net using c#. I know this can be done using artificial neural networks. Any ideas would be much appreciated.

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• How to make a CodeIgniter project portable with redirects

  - by Jono

  I would like to set up my codeigniter projects so I can use it in any folder on my webserver. Unfortunately codeigniter requires me to specify the location in several variables of the config. This is a problem for portability. There are 3 places where I see this: 1) $config['base_url'] 2) $config['base_path'] 3) .htaccess RewriteRule So far, I have found the solution to (1) here: http://codeigniter.com/wiki/Automatic_base_url/ I am looking for solutions to (2) and (3), but most importantly (3). Here is an example situation: I set .htaccess to have the RewriteRule as follows: RewriteRule ^(.*)$ /folderA/index.php/$1 [L] Then I go into my repo and check out the project to another folder to make some separate changes. Now I have to update .htaccess to show the following: RewriteRule ^(.*)$ /folderB/index.php/$1 [L] I would like to set it so I dont have to make any config changes when I check out another copy.

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• Flex - How do I get the absolute X and Y coordinate including HTML offset?

  - by Mauricio

  Hey everyone, I am calling a JS function through the ExternalInterface using Flex which requires the absolute X and Y coordinates to create a pop-up menu. The Flex application is displayed on the center of an HTML page, therefore there is an HTML X and Y offset to consider. I have tried using the LocalToGlobal and ContentToGlobal functions, but these are just giving me the X and Y coordinates relative to the Flex application, it is not considering the HTML X and Y offset of having the Flex app in the center of the page or varying different screen resolutions. Is the best approach to retrieve the HTML X and Y offset using JavaScript? Is there a Flex function I can use that provides the absolute X and Y coordinates based on the HTML page? Thanks!

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• Rails Cache Sweeper and Model Callback Firing

  - by Topher Fangio

  Hey guys, I have the following classes: class Vigil < ActiveRecord::Base after_update :do_something_cool private def do_something_cool # Sweet code here end end class NewsFeedObserver < ActionController::Caching::Sweeper observe Vigil def after_update # Create a news feed entry end end Everything works as expected. The after_update in the sweeper requires that the do_something_cool method in the model has finished before it can run properly. The problem is that the after_update in the sweeper is being called before (or perhaps at the same time as) the do_something_cool callback and it's causing problems. Does anyone know how to force the after_update in the sweeper to fire after the model callback? Is there better way to achieve this?

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• What is the proper way to specify a path to 'app' in a Rails plugin?

  - by Brian Deterling

  This question came about because the cells gem specifies template directories using File.join('app','cells'). That works fine until you run Rails as a daemon (scripts/server -d). The daemon switches directories to / which leaves the cells template paths pointing to the wrong absolute path. My solution was to set the default paths to File.join(RAILS_ROOT, 'app', 'cells'). This works in Rails, but the unit tests for the plugin fail because RAILS_ROOT isn't defined. Using File.join(File.dirname(__FILE__),'..' ... also works but requires about 6 levels of '..' which seems wrong. So my question is what is the proper way to specify the path to a directory under 'app' in a Rails plugin? Or is there something else wrong that would cause daemonizing Rails to fail to find the relative paths?

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• last-child CSS issues

  - by Neurofluxation

  Hey you guys (and girls), I have implemented the following CSS: #tab-navigation ul li:last-child { background-image: url(../images/tabs-end.gif); background-repeat: no-repeat; color: #fff; display: block; border: 1px solid red; background-position: right; } However, for some reason this is not working at all in IE (surprise!) - I read (after some research) that IE requires a DOCTYPE, but I already have <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> defined. Any ideas peeps?

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• Execute Oracle RAC cluster commands via Solaris RBAC?

  - by David Citron

  Executing Oracle RAC cluster management commands such as $ORA_CRS_HOME/bin/crs_start requires root permissions. Using Solaris RBAC (Role-Based Access Control), one can give a non-root user permissions to execute those commands, but the commands still fail internally. Example: $pfexec /opt/11.1.0/crs/bin/crs_stop SomeArg CRS-0259: Owner of the resource does not belong to the group. Is there a complete RBAC solution for Oracle RAC or does the executor need to be root? EDIT: Note that my original /etc/security/exec_attr contained: MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start:uid=0 MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start.bin:uid=0 As Martin suggests below, this needed to be changed to add gid=0 as: MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start:uid=0;gid=0 MyProfile:suser:cmd:::/opt/11.1.0/crs/bin/crs_start.bin:uid=0;gid=0

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• How to test Calendar Event on emulator?

  - by Pranav

  Hi everybody, I am developing an application which requires to add Calendar event. I have written the code for inserting event to the calendar. But whenever i run my application, everytime i get error that "Fail to find provider info for Calendar" and it also throws me NullPointerException error. So, what it means and i found that emulator doesn't provide Calendar application in-built. I think if the Android Emulator doesn't have Calender API, so, naturally, it will not have any database URI in the emulator whereas the Contact has URI --"content://contacts/people". I also found the URI for Calendar as "content://calendar/calendars" but it doesn't work and it means that it gives me error cause of missing Calendar application. Can anybody clarify me, with suggestions regarding Calendar Event? Which is the way to test my application with Calendar Event? I really need your help. Please needful for the same. Thanks. Regards, Pranav

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• Authorization in a more purely OOP style...

  - by noblethrasher

  I've never seen this done but I had an idea of doing authorization in a more purely OO way. For each method that requires authorization we associate a delegate. During initialization of the class we wire up the delegates so that they point to the appropriate method (based on the user's rights). For example: class User { private deleteMemberDelegate deleteMember; public StatusMessage DeleteMember(Member member) { if(deleteMember != null) { deleteMember(member); } } //other methods defined similarly... User(string name, string password) //cstor. { //wire up delegates based on user's rights. //Thus we handle authentication and authorization in the same method. } } This way the client code never has to explictly check whether or not a user is in a role, it just calls the method. Of course each method should return a status message so that we know if and why it failed. Thoughts?

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• How to generate a random alpha-numeric string in Java

  - by Todd

  I've been looking for a simple java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be used as a unique session/key identifier that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated) . Ideally I would be able to specify a length depending on my uniqueness needs. For example, a generated string of length 12 might look something like "AEYGF7K0DM1X". Answers: I like @Apocalisp and @erickson's answers equally well. The only downside to @Apocalisp's answer is it requires an apache class. Thanks to both for the help!

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• Is it possible to have an out-of-process COM server where a separate O/S process is used for each ob

  - by Tom Williams

  I have a legacy C++ "solution engine" that I have already wrapped as an in-process COM object for use by client applications that only require a single "solution engine". However I now have a client application that requires multiple "solution engines". Unfortunately the underlying legacy code has enough global data, singletons and threading horrors that given available resources it isn't possible to have multiple instances of it in-process simultaneously. What I am hoping is that some kind soul can tell me of some COM magic where with the flip of a couple of registry settings it is possible to have a separate out-of-process COM server (separate operating system process) for each instance of the COM object requested. Am I in luck?

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• How Java Runtime Maps to Targets

  - by zharvey

  According to the Javadocs for Runtime here: Every Java application has a single instance of class Runtime that allows the application to interface with the environment in which the application is running. The current runtime can be obtained from the getRuntime method. An application cannot create its own instance of this class. My question is: what's their definition of an application? Is each JAR/WAR/EAR considered a standalone application? What about a plain ole' Driver.class class with a main() method? What about JEE containers that house EARs and EJBs? I guess I'm trying to understand how many Runtime instances could be up and running inside a complex (JEE) system. And understanding that requires me to understand what specific "things" constitute an "application" in Java terminology. Thanks in advance!

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• Java Spring 3.0 MVC Annotation vs COC. Whats the preferred method in the Java community?

  - by Athens

  I am using Spring's MVC framework for an application I'm hosting on Google's App Engine. So far, my controllers are registered via the @Controller annotation; however, prior to getting into Spring, I evaluated ASP.net MVC 2 which requires no configuration and is based on convention. Is convention over configuration (COC) the current and preferred method in the Java community to implement MVC with Spring. Also, this may be a result of my limited knowledge so far but i noticed that i could only instantiate my Controllers the required constuctor injection if i use the COC method via the ControllerClassNameHandlerMapping. For instance the following controller bean config will fail if i use the defaultannotationhandlermapping. <bean id="c" class="com.domain.TestController"> <constructor-arg ref="service" /> </bean> <bean id="service" class="com.domain.Service" /> My com.domain.TestController controller works fine if i use ControllerClassNameHandlerMapping/COC but it results in an error when i use defaultannotationhandlermapping/Annotations.

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• jQuery.post dynamic data callback function

  - by FFish

  I have a script that requires quite e few seconds of processing, up to about minute. The script resizes an array of images, sharpens them and finally zips them up for the user to download. Now I need some sort of progress messages. I was thinking that with jQuery's .post() method the data from the callback function would progressively update, but that doesn't seem to work. In my example I am just using a loop to simulate my script: $(document).ready(function() { $('a.loop').click(function() { $.post('loop.php', {foo:"bar"}, function(data) { $("div").html(data); }); return false; }); }); loop.php: for ($i = 0; $i <= 100; $i++) { echo $i . "<br />"; } echo "done";

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• Oracle database connection string PLSQL compatibility

  - by user521180

  Hi I'm using an application called Logi info. it requires a connection string to my oracle database. the connection works fine but in order to configure the connection to recive ref cursors from the database, I apparently need to add PLSQLRSet=1 to the end of the string. when I do that I recieve an error "invalid connection string" Here is my connection string without plsqlrset=1 Data Source=SID; User Id=username; Password=password; My concern is that PLSQLRSet=1 might be .NET paramater only. Can anyone shed some light on the issue. Thanks

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• Problem w/ Paperclip, MacPorts, ImageMagick & Snow Leopard

  - by Kyle Decot

  I'm attempting to use ImageMagick along w/ Paperclip to handle the images on my rails app. The problem is whenever I try to upload an image I get the following in the terminal: [paperclip] An error was received while processing: #<Paperclip::NotIdentifiedByImageMagickError: /var/folders/go/goZ833AaFaqyvv5RnLqQmE+++TM/-Tmp-/stream20110107-6356-1xfs9j1-0.jpg is not recognized by the 'identify' command.> I have added the following to my environments/development.rb file: Paperclip.options[:command_path] = "/usr/local/bin" If I try to interact w/ ImageMagick in the terminal by using "convert" or something similar I get: dyld: Library not loaded: /opt/local/lib/libltdl.7.dylib Referenced from: /usr/local/bin/convert Reason: Incompatible library version: convert requires version 10.0.0 or later, but libltdl.7.dylib provides version 9.0.0 Trace/BPT trap I've already tried updating everything w/ port but the problem still persists. Does anyone have any ideas or suggestions?

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• Authentication from url in Restlet

  - by DutrowLLC

  I've been using Restlets "ChallengeResponse" mechanism to authenticate users so far. ChallengeResponse challengeResponse = getRequest().getChallengeResponse(); if( challengeResponse == null ){ throw new RuntimeException("not authenticated"); } String login = challengeResponse.getIdentifier(); String password = new String(challengeResponse.getSecret()); From my understanding, "ChallengeResponse" requires that the username and password are put into headers. However a client needs to put the credentials into the url like so: https://username:[email protected]/my_secure_document When I looked at what was actually sent, it looks like the password is being hashed. What is the proper way to authenticate in this fashion using Restlet?

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• Transferring Data Directly between 2 Connections in Indy (TIdContext)

  - by killercode

  ive a sever running TIdTCPServer, and Client Using Web Browser (or any other software) to Communicate, i dunno the protocol, but what im trying to do is to Send The Data between the client and another Connection (Both Connected to the same TIdTCPServer) for example the data sent by the first client is transmitted to the second client, and the data sent by the second client is transmitted to the first client, like a proxy (i cant really use a proxy server since its just this one condition) and the TIdTCPServer should still be receiving other clients and processing their data. i stumbled upon the first line of code, since TIdContext.Connection.Socket.ReadLn requires a Delimiter, and the Client's Protocol is unknown to the server. any ideas? thanks.

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• richfaces keepAlive not working

  - by Jurgen H

  I have a mediaOutput tag which, in its createContent attribute, requires the backing bean to be in a certain state. A list of values, which is filled in an init method, must be available. I therefore added a keepAlive tag for the whole backing bean. I now indeed see the backingBean in stead of some (richfaces) proxy bean, but the filled list is null again. How to make this possible? I checked that the init method was called and that the list is filled in in the init method. <a4j:keepAlive beanName="myBean" /> <a4j:mediaOutput createContent="#{myBean.writeChart}" ... /> The backing bean public class MyBean implements Serializable { public List list; public void init(ActionEvent event) { // call some resource to fill the list list = service.getItems(); } public void writeChart(final OutputStream out, final Object data) throws IOException { // list is null } // getters & setters }

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• How do I pass the currently logged in user's credentials to a web service using Integrated Windows A

  - by Chris Smith

  I am having a frustrating time trying to do something with Perl that would take a couple of lines of code in C#, namely to call a web service on a Windows server that requires Integrated Windows Authentication. The most likely candidate I've found for success is a module called LWP::Authen::Ntlm, but all the examples I've googled require you to explicitly supply username, password and domain. I don't want to do that - I just want the request to use the credentials of the currently logged in user, a la CredentialCache.DefaultCredentials in .NET. Have any of you Perl gurus out there ever had to do this? Thanks.

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• How to set RequestBody for Http Delete method.

  - by Tushar Tarkas

  I am writing a client code for a server which Delete API. The API specification requires data to be sent. I am using HttpComponents v3.1 library for writing client code. Using the HtpDelete class I could not find a way to add request data to it. Is there a way to do so ? Below is the code snippet. HttpDelete deleteReq = new HttpDelete(uriBuilder.toString()); List<NameValuePair> postParams = new ArrayList<NameValuePair>(); postParams.add(new BasicNameValuePair(RestConstants.POST_DATA_PARAM_NAME, postData.toString())); try { UrlEncodedFormEntity entity = new UrlEncodedFormEntity(postParams); entity.setContentEncoding(HTTP.UTF_8); //deleteReq.setEntity(entity); // There is no method setEntity() deleteReq.setHeader(RestConstants.CONTENT_TYPE_HEADER, RestConstants.CONTENT_TYPE_HEADER_VAL); } catch (UnsupportedEncodingException e) { logger.error("UnsupportedEncodingException: " + e); } Thanks in advance.

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• Context module for block visibility

  - by calebthorne

  I have a site built in Drupal 6 that requires a number of blocks that are only visible to certain roles or on specific pages. Normally, I would use the block configuration settings to control page and role visibility. However I recently ran across the context module that effectively splits the site into "sections" or "groups" of related attributes. My question is: When is it appropriate to control block visibility from context rather than the block configuration settings? Should I only use one or the other or a combination of both?

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• How does one pre-populate a Python Formish form?

  - by Jace

  How does one pre-populate a Formish form? The obvious method as per the documentation doesn't seem right. Using one of the provided examples: import formish, schemaish structure = schemaish.Structure() structure.add( 'a', schemaish.String() ) structure.add( 'b', schemaish.Integer() ) schema = schemaish.Structure() schema.add( 'myStruct', structure ) form = formish.Form(schema, 'form') If we pass this a valid request object: form.validate(request) The output is a structure like this: {'myStruct': {'a': 'value', 'b': 0 }} However, pre-populating the form using defaults requires this: form.defaults = {'myStruct.a': 'value', 'myStruct.b': 0} The dottedish package has a DottedDict object that can convert a nested dict to a dotted dict, but this asymmetry doesn't seem right. Is there a better way to do this?

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• ZipArchive php Class, would this be the best approach??

  - by SoLoGHoST

  Ok, just wondering on the versions of PHP that this class is built into. And if they are built into all platforms (OS's). I'm wanting an approach to search through a zip file and place files using file_put_contents in different filepaths within the webroot. In any case, I'm familiar with how to do this with the ZipArchive class, but I'm wondering if using this class would be a good solution and support MOST, if not ALL servers?? I mean, I'd rather not use a method that requires the Server to have it installed. I'm looking for a solution to this that will support at least MOST servers without having to install the class... Thanks :) Also, I'd like to support opening tar.gz and/or .tgz files if possible, but I don't think the ZipArchive class supports this, but perhaps a different built-in php class does??

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• Security in API authentication

  - by Carlos

  We are in the process of revamping our server side API, and we need to manage security. Our current model requires that a credentials object (containing user, password, and pin) be included in each method invocation. Our development team, however, has decided that we should have session objects instead (which is fine by me), but the new credentials are just a GUID. This is very different from what I've seen in other APIs in our industry, so I'm a bit concerned about how secure the new model will be. I asked them if they had analyzed both alternatives, and they said they haven't. Does anyone know if there're any clear advantages, disadvantages, risks, etc. of using a set of credentials versus just one element (complex as it may be)? PS: the communication channel would be secure in either case, and it's separate from this particular topic

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