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  • Is there a Java method that encodes a collection of parameters as a URL query component?

    - by Steven Huwig
    Is there a widely-used Java library that does something like what dojo.objectToQuery() does? E.g. (assuming the use of HttpCore's HttpParams object, but any key-value mapping will do): HttpParams params = new BasicHttpParams() .setParameter("foo", "bar") .setParameter("thud", "grunt"); UnknownLibrary.toQueryString(params); should yield "foo=bar&thud=grunt". I know it's not hard to write but it seems like it should have already been written. I just can't find it.

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  • What are the weaknesses of this user authentication method?

    - by byronh
    I'm developing my own PHP framework. It seems all the security articles I have read use vastly different methods for user authentication than I do so I could use some help in finding security holes. Some information that might be useful before I start. I use mod_rewrite for my MVC url's. Passwords are sha1 and md5 encrypted with 24 character salt unique to each user. mysql_real_escape_string and/or variable typecasting on everything going in, and htmlspecialchars on everything coming out. Step-by step process: Top of every page: session_start(); session_regenerate_id(); If user logs in via login form, generate new random token to put in user's MySQL row. Hash is generated based on user's salt (from when they first registered) and the new token. Store the hash and plaintext username in session variables, and duplicate in cookies if 'Remember me' is checked. On every page, check for cookies. If cookies set, copy their values into session variables. Then compare $_SESSION['name'] and $_SESSION['hash'] against MySQL database. Destroy all cookies and session variables if they don't match so they have to log in again. If login is valid, some of the user's information from the MySQL database is stored in an array for easy access. So far, I've assumed that this array is clean so when limiting user access I refer to user.rank and deny access if it's below what's required for that page. I've tried to test all the common attacks like XSS and CSRF, but maybe I'm just not good enough at hacking my own site! My system seems way too simple for it to actually be secure (the security code is only 100 lines long). What am I missing? I've also spent alot of time searching for the vulnerabilities with mysql_real_escape string but I haven't found any information that is up-to-date (everything is from several years ago at least and has apparently been fixed). All I know is that the problem was something to do with encoding. If that problem still exists today, how can I avoid it? Any help will be much appreciated.

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  • What's the purpose of GC.SuppressFinalize(this) in Dispose() method?

    - by mr.b
    I have code that looks like this: /// <summary> /// Dispose of the instance /// </summary> public void Dispose() { if (_instance != null) { _instance = null; // Call GC.SupressFinalize to take this object off the finalization // queue and prevent finalization code for this object from // executing a second time. GC.SuppressFinalize(this); } } Although there is a comment that explains purpose of that GC-related call, I still don't understand why it's there. Isn't object destined for garbage collection once all instances cease from existence (like, when used in using() block)? What's the use case scenario where this would play important role? Thanks!

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  • Adding custom/new properties to any file regardless of type and extension e.g. setting 'Author' on a

    - by Vaibhav Garg
    I want the ability add properties and tags to a file (specifically ebook files and ebook related properties in Windows 7 but interested to go so for as many OSes as possible) For e.g. Example.txt or Example.doc or Example.epub should all store and carry properties like 'Author', 'Publication date', 'Tags' etc.. the properties should be stored with the file itself. Such that if it is transferred to another system it retains the properties (even if i need to install 'my app' to support this function on the other machine) How do I make this possible using .net (preferred) and what file system concepts should I learn to understand the underlying concepts and limitations to be able to implement this feature? Any application that already does this? Thank you

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  • What is a good automated data import method for SQL Server?

    - by Joel Potter
    I'm in the process of porting some SQL Server 2005 databases to SQL Server 2008. One of these databases has an associated import application (Windows task) which uses SSIS with a DTS package to import a large dataset from an MS Access database nightly. In upgrading to SQL Server 2008, I discovered that I can't run the same console application which has been performing the imports due to the missing manageddts DLL in SQL Server 2008. It's several years old and in need of a rewrite for various reason, plus, I've been fairly unhappy with DTS in general. The original reason DTS was chosen was for speed (5 min import time compared to 30+ for ADO.NET). The format of the data to import is out of my control (the client likes Access). I would also like to be able to run the import from a machine completely separate from the server hosting SQL Server and preferably with minimal SQL features installed. Options I've considered: Creating an Access application to connect to both databases (SQL Server and Access) and perform the import (Ugh!) Revisiting ADO.NET to see if the original implementation was poorly written. Updated SSIS packages. What other technologies should I be considering for this job?

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  • Really cool way to create custom UITabBar for iPhone app?

    - by ludicco
    Hi, I am doing a lot of researching lately about how to get a different looking with nice effects UITabBar on my iPhone app, but unfortunately I am only finding things on how to replace background color etc. Well, I've checked out this app called Momento which is pretty cool and presents a very slick tabBar: So there are a couple of elements here I would like to ask you guys if you could help me by giving me the right directions on how to get a similar effect :) Arrow above items: as you can see this app has this animated arrow that runs above the selected item with a very smooth animation. Selected Stated of the item's image is not that blue-ish default one neither the default state which displays in a different shade of brown and gray version. nice Items separators with beveled vertical lines. diferrent background image for the tabBar different height for the tabBar At this point after some research I am able to set the height and background image by subclassing UITabBarController but I'm still not sure on how to accomplish the other items specially the first one related to the nice arrow effect. If someone knows about a very good tutorial on how to do this it would be great for clarifying what can or can't be done by subclassing the UITabBarController and specially if can be done in Interface Builder :) I am just starting on this world off app development for iOS so if you could help me on that it would be really appreciated Thanks a lot in advance

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  • How to make TwoWay binding on properties of ObservableCollection of custom class using mvvm pattern?

    - by mill
    I have the following class: public class UserGroup { public string GroupName { get; set; } public bool IsIntheGroup{ get; set; } } I want to bind an ObservableCollection of UserGroup items to listbox containing checkbox’s for each item in the collection and the checkbox is cheked based on the IsIntheGroup property of the UserGroup. In my ViewModel I made an ObservableCollection of the UserGroup class: public ObservableCollection Groups { get; set; } and loaded its contents (instances of UserGroup) from my database model I used the following code in my view: ListBox ItemsSource="{Binding Groups, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged}" ListBox.ItemTemplate DataTemplate StackPanel Orientation="Horizontal" CheckBox IsChecked="{Binding IsIntheGroup, Mode=TwoWay}"/ TextBlock Text="{Binding GroupName}" / /StackPanel /DataTemplate /ListBox.ItemTemplate /ListBox The problem is I am not notified when the user checks/unchecks a check box in the list so my two way binding failed… How do I do a two way binding in such a case?

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  • why does .replace method use forward slash characters to enclose the first argument?

    - by Phillip Dodd
    I am working through a book about Javascript and have encountered the following example of code designed to replace the value of the class attribute of a table header HTML element: th.className = th.className.replace(/asc/,"dsc"); th.className = th.className.replace(/dsc/,"asc"); Why is the first parameter of .replace, the current value of th.className, enclosed in forward slashes instead of quotation marks? Why not use quotation marks to enclose both parameters, not just the second one? Thank you in advance for any help given. First time posting, apologies if I duplicated a question despite searching the site before posting.

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  • What is the simplest method to fill the area under a geom_freqpoly line?

    - by mattrepl
    The x-axis is time broken up into time intervals. There is an interval column in the data frame that specifies the time for each row. The column is a factor, where each interval is a different factor level. Plotting a histogram or line using geom_histogram and geom_freqpoly works great, but I'd like to have a line, like that provided by geom_freqpoly, with the area filled. Currently I'm using geom_freqpoly like this: ggplot(quake.data, aes(interval, fill=tweet.type)) + geom_freqpoly(aes(group = tweet.type, colour = tweet.type)) + opts(axis.text.x=theme_text(angle=-60, hjust=0, size = 6)) I would prefer to have a filled area, such as provided by geom_density, but without smoothing the line: UPDATE: The geom_area has been suggested, is there any way to use a ggplot2-generated statistic, such as ..count.., for the geom_area's y-values? Or, does the count aggregation need to occur prior to using ggplot2?

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  • Best method to cleanly shut down an application launched via another.

    - by JYelton
    I couldn't find any close answers to this, so I'm consulting the experience of SO users: Scenario: I have two small C# winforms applications where one behaves as a server or host, the other as a client. They share data via SQL Server, in terms of configuration settings. I am currently launching the client application (which only needs to run periodically) from the server application via Process.Start() and terminating it via Process.CloseMainWindow() (after finding it in the process list). While it seems clean enough, I wondered if there's a better way. Question: Which way would be best to instruct the client application to shut down: Continue using Process.CloseMainWindow()? Implement WCF between the applications? (I would need help on how to do this.) Set a variable in SQL that the client application checks for? Some other way?

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  • How to get custom form fields from controller -- a.k.a. how to not use date helpers in form

    - by 99miles
    I created a form with scaffold that includes two datetime fields. I replaced them with a datepicker, and now I'm trying to grab the date from within the controller. Instead of having ruby do all the magic work with the datefields, I instead just have to fields, start_date and stop_date that I want to use, but I can't figure out how to grab them from within my controller. Hints? Thanks!

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  • Zend Form - how do I create these custom form elements?

    - by Jeremy Hicks
    This is a very specific instance where I'm having difficulty getting Zend Form to produce the correct output and supply the correct validation. I may have to go create a composite element but thought I'd ask here first. Here is the HTML I'm trying to get Zend Form to produce. I'd like this to be able to work where if the validation doesn't pass that the error messages still show up inline with the field that produced the error. <tr> <td>Budget</td> <td> <input type="radio" name="budget" value="unlimited" /> unlimited <br /> <input type="radio" name="budget" value="limited" /> $ <input type="text" name="budget_amount" /> every <select name="budget_period"> <option value="day">day</option> <option value="week">week</option> <option value="month">month</option> <option value="year">year</option> </select> </td> </tr> <tr> <td></td> <td><input type="checkbox" name="include_weekends" value="yes" /> include weekends?</td> </tr> The user can choose either unlimited or limited for the budget value, however, if they choose limited, then they are required to enter a value for the budget amount field and choose a value from the select for the budget period field.

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  • Why i am getting NullPointerException for this btree method??

    - by user306540
    hi, i am writing code for btree algorithms. i am getting NullPointerException . why???? please somebody help me...! public void insertNonFull(BPlusNode root,BPlusNode parent,String key) { int i=0; BPlusNode child=new BPlusNode(); BPlusNode node=parent; while(true) { i=node.numKeys-1; if(node.leaf) { while(i>=0 && key.compareTo(node.keys[i])<0) { node.keys[i+1]=node.keys[i]; i--; } node.keys[i+1]=key; node.numKeys=node.numKeys+1; } else { while(i>=0 && key.compareTo(node.keys[i])<0) { i--; } } i++; child=node.pointers[i]; if(child!=null && child.numKeys==7) { splitChild(root,node,i,child); if(key.compareTo(node.keys[i])>0) { i++; } } node=node.pointers[i]; } }

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  • Is there an easy way to replace a deprecated method call in Xcode?

    - by Alex Basson
    So iOS 6 deprecates presentModalViewController:animated: and dismissModalViewControllerAnimated:, and it replaces them with presentViewController:animated:completion: and dismissViewControllerAnimated:completion:, respectively. I suppose I could use find-replace to update my app, although it would be awkward with the present* methods, since the controller to be presented is different every time. I know I could handle that situation with a regex, but I don't feel comfortable enough with regex to try using it with my 1000+-files-big app. So I'm wondering: Does Xcode have some magic "update deprecated methods" command or something? I mean, I've described my particular situation above, but in general, deprecations come around with every OS release. Is there a better way to update an app than simply to use find-replace?

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  • How to do custom jquery lives in 1.4.1?

    - by chobo2
    Hi I been sort of using jquery livequery plugin and jquery live together. However now that I am using 1.4 it seems jquery livequery is not working 100%. So I am not sure how to tackle this problem I have this in livequery $('#Description').livequery(function () { $('#Description').htmlarea({ toolbar: [ ["bold", "italic", "underline", "strikethrough", "|", "subscript", "superscript"], ["increasefontsize", "decreasefontsize"], ["orderedlist", "unorderedlist"], ["indent", "outdent"], ["link", "unlink"] ] }); }); So everytime I loaded up my page. It would actually run that code in the livequery and display and if I went to another ajax tab and come back it would go into this again. Now I am not sure how to change it to .live() jquery 1.4 since I just tried to do this $('#Description').live(function () { $('#Description').htmlarea({ toolbar: [ ["bold", "italic", "underline", "strikethrough", "|", "subscript", "superscript"], ["increasefontsize", "decreasefontsize"], ["orderedlist", "unorderedlist"], ["indent", "outdent"], ["link", "unlink"] ] }); }); and it does not seem to work. the plugin is not binded and the rich html editor is not displayed.

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  • What if a large number of objects are passed to my SwingWorker.process() method?

    - by Trejkaz
    I just found an interesting situation. Suppose you have some SwingWorker (I've made this one vaguely reminiscent of my own): public class AddressTreeBuildingWorker extends SwingWorker<Void, NodePair> { private DefaultTreeModel model; public AddressTreeBuildingWorker(DefaultTreeModel model) { } @Override protected Void doInBackground() { // Omitted; performs variable processing to build a tree of address nodes. } @Override protected void process(List<NodePair> chunks) { for (NodePair pair : chunks) { // Actually the real thing inserts in order. model.insertNodeInto(parent, child, parent.getChildCount()); } } private static class NodePair { private final DefaultMutableTreeNode parent; private final DefaultMutableTreeNode child; private NodePair(DefaultMutableTreeNode parent, DefaultMutableTreeNode child) { this.parent = parent; this.child = child; } } } If the work done in the background is significant then things work well - process() is called with relatively small lists of objects and everything is happy. Problem is, if the work done in the background is suddenly insignificant for whatever reason, process() receives a huge list of objects (I have seen 1,000,000, for instance) and by the time you process each object, you have spent 20 seconds on the Event Dispatch Thread, exactly what SwingWorker was designed to avoid. In case it isn't clear, both of these occur on the same SwingWorker class for me - it depends on the input data, and the type of processing the caller wanted. Is there a proper way to handle this? Obviously I can intentionally delay or yield the background processing thread so that a smaller number might arrive each time, but this doesn't feel like the right solution to me.

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  • How to :update after :success with link_to_remote Rails method?

    - by Kevin
    Hi, I'm trying to get two things done after a user clicks on a link: Delete a div Add another element at the bottom of the page I played with Rails link_to_remote and what I get with the code below is that the element is added before the div is deleted: <%= link_to_remote "&#x2713;", :url => { :controller => :movies, :action => :mark_as_seen, :movie => movie, :render => 'movie' }, :success => "Effect.Fade('movie_#{movie.id}_wrapper', { duration: 0.4 })", :update => "movies", :position => "bottom", :failure => "alert('Ooops! An error occurred.')" %> I tried to put :update and :position in a :complete callback, but nothing happened. And when I put both of them in the :success callback (after Effect.Fade), all I get is a parsing error. Any idea? Thanks, Kevin

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  • Why can I call a non-const member function pointer from a const method?

    - by sdg
    A co-worker asked about some code like this that originally had templates in it. I have removed the templates, but the core question remains: why does this compile OK? #include <iostream> class X { public: void foo() { std::cout << "Here\n"; } }; typedef void (X::*XFUNC)() ; class CX { public: explicit CX(X& t, XFUNC xF) : object(t), F(xF) {} void execute() const { (object.*F)(); } private: X& object; XFUNC F; }; int main(int argc, char* argv[]) { X x; const CX cx(x,&X::foo); cx.execute(); return 0; } Given that CX is a const object, and its member function execute is const, therefore inside CX::execute the this pointer is const. But I am able to call a non-const member function through a member function pointer. Are member function pointers a documented hole in the const-ness of the world? What (presumably obvious to others) issue have we missed?

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  • How to convert a .NET WebService-Method-Result (Soap) into its original datatype?

    - by Marc
    Hello everyone. I have two "identical" webservices (Soap) on two different servers. Don't ask why :-) WebService-1 decides if it handels the request itself or if it passes the request to WebService-2. If so, the response of WebService-2 should directly be returned from WebService-1. The response datatype is complex and self defined. With simple datatypes like 'int or 'string' there would be no problem. The response of WebService-2 is a serialized object (I think it is called "stubs") and theredore it is not possibel to pass this object through as the response of WebService-1 because the type of the objects doesn't match. Is there a simple way to convert the serialised datatype into its original type without buiding a complex converter?

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