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  • xmlrpc client call in python does not come back

    - by Jack Ha
    Using Python 2.6.4, windows With the following script I want to test a certain xmlrpc server. I call a non-existent function and hope for a traceback with an error. Instead, the function does not return. What could be the cause? import xmlrpclib s = xmlrpclib.Server("http://127.0.0.1:80", verbose=True) s.functioncall() The output is: send: 'POST /RPC2 HTTP/1.0\r\nHost: 127.0.0.1:80\r\nUser-Agent: xmlrpclib.py/1.0 .1 (by www.pythonware.com)\r\nContent-Type: text/xml\r\nContent-Length: 106\r\n\ r\n' send: "<?xml version='1.0'?>\n<methodCall>\n<methodName>functioncall</methodName >\n<params>\n</params>\n</methodCall>\n" reply: 'HTTP/1.1 200 OK\r\n' header: Content-Type: text/xml header: Cache-Control: no-cache header: Content-Length: 376 header: Date: Tue, 30 Mar 2010 13:27:21 GMT body: '<?xml version="1.0"?>\r\n<methodResponse>\r\n<fault>\r\n<value>\r\n<struc t>\r\n<member>\r\n<name>faultCode</name>\r\n<value><i4>1</i4></value>\r\n</membe r>\r\n<member>\r\n<name>faultString</name>\r\n<value><string>PVSS00ctrl (2), 2 010.03.30 15:27:21.395, CTRL, SEVERE, 72, Function not defined, functioncall , , \n</string></value>\r\n</member>\r\n</struct>\r\n</value>\r\n</fault>\r\n</m ethodResponse>\r\n' (here the program hangs and does not return until I kill the server) edit: the server is written in c++, using its own xmlrpc library

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  • Useful Eclipse Java Code Templates

    - by Jon
    You can create various Java code templates in Eclipse via the Window->Preferences->Java -> Editor -> Templates e.g. sysout is expanded to: System.out.println(${word_selection}${});${cursor} You can activate this by typing sysout followed by CTRL+SPACE What useful Java code templates do you currently use? Include the name and description of it and why it's awesome. There's an open bounty on this for an original/novel use of a template rather than a built-in existing feature. Create Log4J logger Get swt color from display Syncexec - Eclipse Framework Singleton Pattern/Enum Singleton Generation Readfile Const Traceout Format String Comment Code Review String format Try Finally Lock Message Format i18n and log Equalsbuilder Hashcodebuilder Spring Object Injection Create FileOutputStream

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  • Monthly Payment Processing

    - by jack
    I am building site for a client in .NET. The site has a monthly subscription service, wherein customer pay for the services with debit/credit card details. Money will be deducted from the account regularly. Customers can cancel the subscription service at any time and the collection should be stopped. Is there any service that I can use to accomplish this? Any information on how to go about developing this will be much appreciated. Thanks in advance.

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  • How to start recognizing design patterns as you are programming?

    - by Jon Erickson
    I have general academic knowledge of the various design patterns that are discussed in GoF and Head First Design Patterns, but I have a difficult time applying them to the code that I am writing. A goal for me this year is to be able to recognize design patterns that are emerging from the code that I write. Obviously this comes with experience (I have about 2 years in the field), but my question is how can I jumpstart my ability to recognize design patterns as I am coding, maybe a suggestion as to what patterns are easiest to start applying in client-server applications (in my case mainly c# webforms with ms sql db's, but this could definitely be language agnostic).

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  • Java error on bilinear interpolation of 16 bit data

    - by Jon
    I'm having an issue using bilinear interpolation for 16 bit data. I have two images, origImage and displayImage. I want to use AffineTransformOp to filter origImage through an AffineTransform into displayImage which is the size of the display area. origImage is of type BufferedImage.TYPE_USHORT_GRAY and has a raster of type sun.awt.image.ShortInterleavedRaster. Here is the code I have right now displayImage = new BufferedImage(getWidth(), getHeight(), origImage.getType()); try { op = new AffineTransformOp(atx, AffineTransformOp.TYPE_BILINEAR); op.filter(origImage, displayImage); } catch (Exception e) { e.printStackTrace(); } In order to show the error I have created 2 gradient images. One has values in the 15 bit range (max of 32767) and one in the 16 bit range (max of 65535). Below are the two images 15 bit image 16 bit image These two images were created in identical fashions and should look identical, but notice the line across the middle of the 16 bit image. At first I thought that this was an overflow problem however, it is weird that it's manifesting itself in the center of the gradient instead of at the end where the pixel values are higher. Also, if it was an overflow issue than I would suspect that the 15 bit image would have been affected as well. Any help on this would be greatly appreciated.

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  • How to tell if XUL menupopup opens down or up?

    - by Jon
    I have an extension that can be placed on any toolbar (like the bookmarks, menu or status bars). In general, the context menu opens downward, but when placed on the status bar and Firefox is closed to the bottom of the screen, the context menu opens upward. I'd like to try reordering the context menu based on its up or down orientation, so that the same options are always closest to the mouse. For example, when opened downward it appears like this: -- (mouse) --------------- - MenuItem A - --------------- - MenuItem B - --------------- - MenuItem C - --------------- - ....... - --------------- When it opens upwards its like this: --------------- - MenuItem A - --------------- - MenuItem B - --------------- - MenuItem C - --------------- - ....... - --------------- -- (mouse) However, I'd like "MenuItem A" to appear closest to the mouse at all times, since its the most common item. I can render the items dynamically, so I really just need to find out the orientation.

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  • How can I convert convert docx or wordml xml files to xsl-fo?

    - by Jon Pastore
    I've been looking for a method to convert docx or wordml xml to xsl-fo. I read this post: http://stackoverflow.com/questions/156683/what-is-the-best-xslt-engine-for-perl but I'm having exceptional problems getting apache-fop going. I was able to download the bins and run it locally but the formatting was a little off and it didn't maintain the headers and footers or section 1 or section 3 (17 page doc 3 sections) it also overlapped the text over the outline numbers and did not maintain the font used. trying a more simple test caused fop to fail completely. I would like to find a way to create a PDF that is at least close to 100% accurate reproduction of the original doc.

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  • Changing paths to images in Wordpress

    - by Jon Winstanley
    I recently moved a friends blog onto his new web hosts but unfortunately the images are not working. This is due to the old host having the following path for images: http://www.example.com/blog/wp-content/uploads/2009/07/imagename.jpg The new host uses a different layout and has this path for the file: http://www.example.com/wp-content/uploads/2009/07/imagename.jpg 'Blog' has been removed. Does anyone know the easiest way to fix this issue?

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  • Dev environment - Cubicles or pods?

    - by jon
    We're reorganizing our workspaces at work, and are individually being given the choice of working in a more open space with a few other developers, or a more closed off space by ourselves. Which should I choose?

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  • Algorithms for subgraph isomorphism detection

    - by Jack
    This a NP Complete problem. More info can be found here http://en.wikipedia.org/wiki/Subgraph_isomorphism_problem The most widely used algorithm is the one proposed by Ullman. Can someone please explain the algorithm to me. I read a paper by him and couldn't understand much. Also what other algorithms for this problem. I am working on an image processing project.

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  • MySQL high IO usage quries

    - by jack
    MySQL has a built-in slow query logger. Is there any options or third-party tools which are able to detect the queries causing high IO usage just in the way like what slow query logger does?

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  • IIS 6/.Net 2:How can user A get the user cookie for unrelated user B who is in a different session a

    - by jon.ediger
    1) user A goes to the site, creates an account, and logs in 2) user b goes to the site. Rather than having to log in, user b enters as though user b is user a. User b gets access to all of user a's data and can brows the site as user a. Note: user b does not log in. User b just hits the site, and the site returns as if user b is already logged in as user a. Note 2: user a and user b are on distinct computers. Also, static variables are not involved in the code. Setup: IIS 6 .Net 2.0 OutputCache off for the pages in the site

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  • Design Time Attribute For CSS Class in ASP.net Custom Server Control

    - by Jon P
    Hopefully some Custom Control Designers/Builders can help I'm attempting to build my first custom control that is essential a client detail collection form. There are to be a series of elements to this form that require various styles applied to them. Ideally I'd like the VS 2005/2008 properties interface to be able to apply the CSSClass as it does at the control level, i.e. with a dropdown list of available CSS Clases. Take for example the Class to be applied to the legend tag /// <summary>Css Class for Legend</summary> [Category("Appearance")] [Browsable(true)] [DefaultValue("")] //I am at a loss as to what goes in [Editor] [Editor(System.Web.UI.CssStyleCollection), typeof(System.Drawing.Design.UITypeEditor))] public string LegendCSSClass { get { return _LegendCSSClass; } set { _LegendCSSClass = value; } } I have tried a couple of options, as you can see from above, without much luck. Hopefully there is something simple I am missing. I'd also be happy for references pertaining to the [Editor] attribute

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  • Distributed sequence number generation?

    - by Jon
    I've generally implemented sequence number generation using database sequences in the past. e.g. Using Postgres SERIAL type http://neilconway.org/docs/sequences/ I'm curious though as how to generate sequence numbers for large distributed systems where there is no database. Does anybody have any experience or suggestions of a best practice for achieving sequence number generation in a thread safe manner for multiple clients?

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  • Language in a Sandbox in Rails

    - by Jon Romero
    I've found that there WAS a sandbox gem (created by the guys that made try ruby in your browser but it was compatible only with Ruby 1.8. Another problem is that I cannot find it anymore (it seems they stop serving the gem from the servers...). So, is there any secure way of running ruby in a sandbox (so you can run it from your browser)? Or an easy way to run (for example lua/python) in a sandbox (no filesystem access, no creation of objects etc) and be called from Ruby (Rails 2.2)? I want to make an application like try_ruby even without having a ruby underneath. But it has to be an easy language (I saw there was a prolog in ruby, even a lisp but I don't think they are easy to learn languages...). So, do you have any suggestions or tips? Or should I just start creating my own DSL in Ruby (if there is a solution in creating a somewhat safe system)? Thx

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  • Uploadify refuses to upload WMV, FLV and MP4 files - SOLVED

    - by Jon Winstanley
    The uploadify plugin for JQuery seems very good and works for most file types. However, it allows me to upload all file types apart from the ones I need! Namely .WMV, .FLV and .MP4 Uploads of any other type work. I have already tried changing the fileExt parameter and also tried removing it altogether. I have testing in Google Chrome, IE7 and Firefox and none work for these file types. I have a ton of local projects already and uploading is not an issue on any other project, I even use the same example files (This is the first time I have used Uploadify) Is there a known reason for this behaviour? EDIT: Have found the issue. I had forgotten to add my usual .htaccess file to the example project.

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  • NTFS drivers on Linux

    - by Jack
    Hopefully this is programming related. Many people have reported that the NTFS-3G driver works perfectly for writing to NTFS drives without any problems. If NTFS has been successfully reverse engineered to a useful degree, then why is the kernel driver still only read-only, with write support being very dangerous.....just as it was 5 years agi?

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  • How to determine visibility in 2D

    - by Jack
    Hello, I'm developing an AI sandbox and I would like to calculate what every living entity can see. The rule is to simply hide what's behind the edges of the shapes from the point of view of the entity. The image clarifies everything: I need it either as an input to the artificial intelligence either graphically, to show it for a specific entity while it moves.. Any cool ideas?

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  • Windows console

    - by b-gen-jack-o-neill
    Hello. Well, I have a simple question, at least I hope its simple. I was interested in win32 console for a while. Our teacher told us, that windows console is just for DOS and real mode emulation purposes. Well, I know it is not true, becouse DOS applications are runned by emulator which only uses console to display output. Another thing I learned is that console is built into Windows since NT. Well. But what I could not find is, how actually are console programs written to use console. I use Visual C++ for programming (well, for learning). So, the only thing I need to do for using console is select console project. I first thought that windows decides wheather it run app in console or tries to run app in window mode. So I created win32 program and tried printf(). Well, I could not compile it. I know that by definition printf() prints text or variables to stdout. I also found that stdout is the console interface for output. But, I could not find what actually stdout is. So, basicly what I want to ask is, where is the difference between console app and win32 app. I thought that windows starts console when it gets command from "console-family" functions. But obvisously it does not, so there must be some code that actually commands windows to create console interface. And the second question is, when the console is created, how does windows recognize which console terminal is used for what app? I mean, what actually is stdout? Is it a area in memory , or some windows routine that is called? Thanks.

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  • String searching algorithm for Chinese characters.

    - by Jack Low
    There are Python code available for existing algorithms for normal string searching e.g. Boyer-Moore Algorithm. I am looking to use this on Chinese characters and it doesn't seem like the same implementation would work. What would I go about doing in order to make the algorithm work on Chinese characters? I am referring to this: http://en.literateprograms.org/Boyer-Moore_string_search_algorithm_(Python)#References

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  • Best way to deal with session handling in Zend Framework

    - by JACK IN THE CRACK
    So I'm starting up in Zend framework and looking to implement a site-wide "User" session.... something I can easily access from ALL modules/controllers in the application. I'm like, should I make a new namespace in the library and extend the controller, like: MyLib_Controller_Action extends Zend_Controller_Action { protected $_userSession; function preDispatch(Zend_Controller_Request_Abstract $req) { $this->_userSession = new Zend_Session_Namespace('user'); } } ANd then have all my controllers/modules/etc extend from that? Or should I create a Plugin or what? How would you go about making this plugin to pass the user session to the controller? Or do I do it in the bootstrap?? Again how to pass to controller? Also should I use Zend_Session_Namespace or Zend_Http_Cookie and also how do I encrypt and xss clean the cookie or is that did automagically?

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  • Reading Source Code Aloud

    - by Jon Purdy
    After seeing this question, I got to thinking about the various challenges that blind programmers face, and how some of them are applicable even to sighted programmers. Particularly, the problem of reading source code aloud gives me pause. I have been programming for most of my life, and I frequently tutor fellow students in programming, most often in C++ or Java. It is uniquely aggravating to try to verbally convey the essential syntax of a C++ expression. The speaker must give either an idiomatic translation into English, or a full specification of the code in verbal longhand, using explicit yet slow terms such as "opening parenthesis", "bitwise and", et cetera. Neither of these solutions is optimal. On the one hand, an idiomatic translation is only useful to a programmer who can de-translate back into the relevant programming code—which is not usually the case when tutoring a student. In turn, education (or simply getting someone up to speed on a project) is the most common situation in which source is read aloud, and there is a very small margin for error. On the other hand, a literal specification is aggravatingly slow. It takes far far longer to say "pound, include, left angle bracket, iostream, right angle bracket, newline" than it does to simply type #include <iostream>. Indeed, most experienced C++ programmers would read this merely as "include iostream", but again, inexperienced programmers abound and literal specifications are sometimes necessary. So I've had an idea for a potential solution to this problem. In C++, there is a finite set of keywords—63—and operators—54, discounting named operators and treating compound assignment operators and prefix versus postfix auto-increment and decrement as distinct. There are just a few types of literal, a similar number of grouping symbols, and the semicolon. Unless I'm utterly mistaken, that's about it. So would it not then be feasible to simply ascribe a concise, unique pronunciation to each of these distinct concepts (including one for whitespace, where it is required) and go from there? Programming languages are far more regular than natural languages, so the pronunciation could be standardised. Speakers of any language would be able to verbally convey C++ code, and due to the regularity and fixity of the language, speech-to-text software could be optimised to accept C++ speech with a high degree of accuracy. So my question is twofold: first, is my solution feasible; and second, does anyone else have other potential solutions? I intend to take suggestions from here and use them to produce a formal paper with an example implementation of my solution.

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  • Regex for string replace in C#

    - by Jack
    I am trying to achieve below output using regex but not able to, can someone please correct the regex - input string : data-placeholder=""[Refer" to "Conditions To Entry Of The Confirmation Order" and "Conditions To Effective Date" sections]" output string : data-placeholder="[Refer to Conditions To Entry Of The Confirmation Order and Conditions To Effective Date sections]" regex tried \s*"\s*([^ "]+)"\s*(?=["])

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  • Mutating the expression tree of a predicate to target another type

    - by Jon
    Intro In the application I 'm currently working on, there are two kinds of each business object: the "ActiveRecord" type, and the "DataContract" type. So for example, we have: namespace ActiveRecord { class Widget { public int Id { get; set; } } } namespace DataContracts { class Widget { public int Id { get; set; } } } The database access layer takes care of "translating" between hierarchies: you can tell it to update a DataContracts.Widget, and it will magically create an ActiveRecord.Widget with the same property values and save that. The problem I have surfaced when attempting to refactor this database access layer. The Problem I want to add methods like the following to the database access layer: // Widget is DataContract.Widget interface DbAccessLayer { IEnumerable<Widget> GetMany(Expression<Func<Widget, bool>> predicate); } The above is a simple general-use "get" method with custom predicate. The only point of interest is that I 'm not passing in an anonymous function but rather an expression tree. This is done because inside DbAccessLayer we have to query ActiveRecord.Widget efficiently (LINQ to SQL) and not have the database return all ActiveRecord.Widget instances and then filter the enumerable collection. We need to pass in an expression tree, so we ask for one as the parameter for GetMany. The snag: the parameter we have needs to be magically transformed from an Expression<Func<DataContract.Widget, bool>> to an Expression<Func<ActiveRecord.Widget, bool>>. This is where I haven't managed to pull it off... Attempted Solution What we 'd like to do inside GetMany is: IEnumerable<DataContract.Widget> GetMany( Expression<Func<DataContract.Widget, bool>> predicate) { var lambda = Expression.Lambda<Func<ActiveRecord.Widget, bool>>( predicate.Body, predicate.Parameters); // use lambda to query ActiveRecord.Widget and return some value } This won't work because in a typical scenario, for example if: predicate == w => w.Id == 0; ...the expression tree contains a MemberAccessExpression instance which has a MemberInfo property (named Member) that point to members of DataContract.Widget. There are also ParameterExpression instances both in the expression tree and in its parameter expression collection (predicate.Parameters); After searching a bit, I found System.Linq.Expressions.ExpressionVisitor (its source can be found here in the context of a how-to, very helpful) which is a convenient way to modify an expression tree. Armed with this, I implemented a visitor. This simple visitor only takes care of changing the types in member access and parameter expressions. It may not be complete, but it's fine for the expression w => w.Id == 0. internal class Visitor : ExpressionVisitor { private readonly Func<Type, Type> dataContractToActiveRecordTypeConverter; public Visitor(Func<Type, Type> dataContractToActiveRecordTypeConverter) { this.dataContractToActiveRecordTypeConverter = dataContractToActiveRecordTypeConverter; } protected override Expression VisitMember(MemberExpression node) { var dataContractType = node.Member.ReflectedType; var activeRecordType = this.dataContractToActiveRecordTypeConverter(dataContractType); var converted = Expression.MakeMemberAccess( base.Visit(node.Expression), activeRecordType.GetProperty(node.Member.Name)); return converted; } protected override Expression VisitParameter(ParameterExpression node) { var dataContractType = node.Type; var activeRecordType = this.dataContractToActiveRecordTypeConverter(dataContractType); return Expression.Parameter(activeRecordType, node.Name); } } With this visitor, GetMany becomes: IEnumerable<DataContract.Widget> GetMany( Expression<Func<DataContract.Widget, bool>> predicate) { var visitor = new Visitor(...); var lambda = Expression.Lambda<Func<ActiveRecord.Widget, bool>>( visitor.Visit(predicate.Body), predicate.Parameters.Select(p => visitor.Visit(p)); var widgets = ActiveRecord.Widget.Repository().Where(lambda); // This is just for reference, see below Expression<Func<ActiveRecord.Widget, bool>> referenceLambda = w => w.Id == 0; // Here we 'd convert the widgets to instances of DataContract.Widget and // return them -- this has nothing to do with the question though. } Results The good news is that lambda is constructed just fine. The bad news is that it isn't working; it's blowing up on me when I try to use it (the exception messages are really not helpful at all). I have examined the lambda my code produces and a hardcoded lambda with the same expression; they look exactly the same. I spent hours in the debugger trying to find some difference, but I can't. When predicate is w => w.Id == 0, lambda looks exactly like referenceLambda. But the latter works with e.g. IQueryable<T>.Where, while the former does not (I have tried this in the immediate window of the debugger). I should also mention that when predicate is w => true, it all works just fine. Therefore I am assuming that I 'm not doing enough work in Visitor, but I can't find any more leads to follow on. Can someone point me in the right direction? Thanks in advance for your help!

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