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• Program hangs when calling parseFrom for java implementation of protobuf

  - by cornerback84

  I have a message (say its called OuterMessage) message OuterMessage { optional int64 id = 1; optional InnerMessage inner = 2; } and an inner message message InnerMessage { optional string type = 1; optioanl int64 id = 2; } Now when I call parseFrom on OuterMessage like OuterMessage.parseFrom(buffer) the method never returns and nor does it throw any exception. But if I do InnerMessage.parseFrom(buffer) it returns an empty InnerMessage instance. I am serializing the message using protobuf-net. Any idea what might be causing the issue?

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• How can I expose a service bus by a wcf service to be consumed by a silverlight client

  - by illdev

  In a Silverlight application, instead of consuming and writing (wcf) wrappers around messages that finally get sent to the bus, I want to send use my message bus as directly as possible. My idea was to expose the service bus directly as a wcf service, or, in other terms, I want to bidirectionally pub/sub over the wire. Has this been done already? Is bi-directionality doable at all? After all, we are (are we restricted to that?) in the http domain? Lots of questions. Some head start would be greatly appreciated! I am in .NET land, with using Rhino Service Bus, but the pattern should apply to different platforms.

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• creation of multiple dataset in Reporting service report

  - by brijit

  Hi, I have a SSRS report and using PL/SQL for the dataset creation. My report needs two tables 1 one gives detailed view.(dataset 1) 2 one below that gives a summary table (data should come from the calculations based on the data in 1 table) I am using a temporary table for the dataset one. What are the methods to get calculated result for dataset 2. I wrote 2 procedures for each. since first table is a temporary one i am not getting result for second dataset. Wht can be the options. Can I have multiple dataset outof single procedure please give me and idea. Thanks brijit

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• VMR9Allocator (DirectShow .NET + SlimDX)

  - by faulty

  I was trying to convert and run the VMR9Allocator sample for DirectShow .NET with SlimDX instead of MDX. I got an exception when it reach this line return vmrSurfaceAllocatorNotify.SetD3DDevice(unmanagedDevice, hMonitor) In the AdviseNotify method in Allocator.cs. The exception is "No such interface supported", and the hr return was "0x80004002". The sample runs fine with MDX, and my SlimDx is also working, as I've written another 3d apps using it, working fine. I can't seems to find out what went wrong, no help from googling as well. Apparently not much ppl uses this combination, and non that i can find actually stumble into this problem. Any idea guys? NOTE: I've asked the same question over at gamedev.net 2 weeks back, no answer thus far.

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• Same code... but warning!Any ideas?

  - by FILIaS

  I've a question for a warning message that i get. For this line,using qsort: qsort(catalog, MAX ,sizeof catalog, struct_cmp_by_amount); I get this warning: warning: passing argument 4 of ‘qsort’ makes pointer from integer without a cast struct_cmp_by_amount is another function on the program. BUT,for another program with the same code, with the same exactly struct_cmp_by_amount function, i dont get that warning for the 4th argument! qsort(structs, structs_len, sizeof(struct st_ex), struct_cmp_by_price); I'm wandering about why that;s happening. Have you any idea?

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• align WMD editor's preview HTML with server-side HTML validation (e.g. no embedded javascript)

  - by Justin Grant

  There are many SO questions (e.g. here and here) about how to do server-side scrubbing of Markdown produced by the WMD editor to ensure the HTML generated doesn't contain malicious script, like this: <img onload="alert('haha');" src="http://www.google.com/intl/en_ALL/images/srpr/logo1w.png" /> This doesn't affect the WMD client's preview box. I doubt this is a big deal since if you're scrubbing the HTML on the server, an attacker can't save the bad HTML so no one else will be able to see it later and have their cookies stolen or sessions hijacked by the bad script. But it's still kinda odd to allow an attacker to run any script in the context of your site, and it's probably a bad idea to allow the client preview window to allow different HTML than your server will allow. StackOverflow has clearly plugged this hole. How did they do it? [NOTE: I already figured this out but it required some tricky javascript debugging, so I'm answering my own question here to help others who may want to do ths same thing]

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• COMET chat application - IIS7 slows down over time

  - by Yaron

  I have built a chat application which uses this code to push messages to clients (web pages) and to monitor online users and their information. Basically, the code creates and manages a custom thread pool for maintaining the list of connected users & their state. The application was hosted on a shared hosting account (IIS6), and worked fine. After moving the site (ASP.Net App) to a dedicated virtual server it seems I have a problem where IIS7 gets slower and slower as time passes, and my only "solution" is to restart IIS. I am trying to look at the performance counters and have do idea on which one to look.

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• An Actor "queue" ?

  - by synic

  In Java, to write a library that makes requests to a server, I usually implement some sort of dispatcher (not unlike the one found here in the Twitter4J library: http://github.com/yusuke/twitter4j/blob/master/twitter4j-core/src/main/java/twitter4j/internal/async/DispatcherImpl.java) to limit the number of connections, to perform asynchronous tasks, etc. The idea is that N number of threads are created. A "Task" is queued and all threads are notified, and one of the threads, when it's ready, will pop an item from the queue, do the work, and then return to a waiting state. If all the threads are busy working on a Task, then the Task is just queued, and the next available thread will take it. This keeps the max number of connections to N, and allows at most N Tasks to be operating at the same time. I'm wondering what kind of system I can create with Actors that will accomplish the same thing? Is there a way to have N number of Actors, and when a new message is ready, pass it off to an Actor to handle it - and if all Actors are busy, just queue the message?

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• simplemodal contact form does not close after sending mail in ie8

  - by frank

  hi, i am using the simplemodal contact form for my website. it works perfectly on safari, firefox and opera on mac os, and firefox and chrome on windows. the only issue i have is with ie8. when i click the "send" button the mail is actually sent but i get an error message (alert window with "unknown" in it) and then everything seems to be in some infinite loop with the "loading.gif" turning and turning. it never gets to the step where i ahve the message "your mail has been sucessfully sent" although like i said the mail is sent. any idea where the problem is coming from ? thanks for your help. frank

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• Should I convert overlong UTF-8 strings to their shortest normal form?

  - by Grant McLean

  I've just been reworking my Encoding::FixLatin Perl module to handle overlong UTF-8 byte sequences and convert them to the shortest normal form. My question is quite simply "is this a bad idea"? A number of sources (including this RFC) suggest that any over-long UTF-8 should be treated as an error and rejected. They caution against "naive implementations" and leave me with the impression that these things are inherently unsafe. Since the whole purpose of my module is to clean up messy data files with mixed encodings and convert them to nice clean utf8, this seems like just one more thing I can clean up so the application layer doesn't have to deal with it. My code does not concern itself with any semantic meaning the resulting characters might have, it simply converts them into a normalised form. Am I missing something. Is there a hidden danger I haven't considered?

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• database design suggesion

  - by Bharanikumar

  Hi , am going to start new travel site, I want some advise from guru's regarding database design , Things coming to picture are, Book taxi online , This is the core idea, So i like to implement lot of jquery,ajax stuff in my site , Main thing site must run veryt fast,safe,security, In mysql , which typw shall i use, MYISAM OR INNODB Which is best type for ajax works, fast,safe ,secure ,performance view . This is my demo site, Just look this site, i implemented some ajax stuff here, my-url In this site please choose the postcode in the taxifrom tab, It ask you value please enter, just enter nw7 , See How long it will take for response,some time no response and system goes to hang or idle mode, Also please look the diversion , select No diversion, There you will list of textbox, enter the nw3 then hit the search icon , See after 80seconds only , you will get response from DB, See this too bad response ... This is DB , my Database type if myisam ,no idexing , no fulltext and nothing...no constraints, So please advise me , which database type i choose, Myisam or innodb, Thanks Bharanikumar

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• Open Source CMS with linked sub-sections and users

  - by Teegijee

  I work at a small college that wants to make "sites" for all of the academic departments (~30). I managed to talk them out of their original idea: 30 individual Wordpress installations. What a maintenance nightmare! What I'm looking for is a CMS (preferably Python or PHP, as those are my areas of expertise) that can automagically create a subsection (or subsite, whatever the appropriate vernacular) complete with user and a couple of headings based on a template. So, I could just click a button and have a new subsection for a new department complete with its own authorized user, and default subsection headings/menu/pages. Is this just wishful thinking? I don't mind getting my hands dirty (this would be the whole of my job duties), so what platform would be a good starting point for something like this? Open source is a must for me as I have literally no budget, and I'm probably going to have to dig pretty deep into the application.

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• iOS: How to access the `UIKeyboard`?

  - by MattDiPasquale

  I want to get a pointer reference to UIKeyboard *keyboard to the keyboard on screen so that I can add a transparent subview to it, covering it completely, to achieve the effect of disabling the UIKeyboard without hiding it. In doing this, can I assume that there's only one UIKeyboard on the screen at a time? I.e., is it a singleton? Where's the method [UIKeyboard sharedInstance]. Brownie points if you implement that method via a category. Or, even more brownie points if you convince me why it's a bad idea to assume only one keyboard and give me a better solution.

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• Paging Results - Drupal Module

  - by Krishma

  Hi I have custom drupal module. I receive result from a webservice that I need to page. Here is what I am doing $result = webservice_call_results(); $attributes = array( 'border' = 1, 'cellspacing' = 0, 'cellpadding' = 5, 'width' = 600, ); $rows = array(); foreach ($result-headers-RPMHeader as $data) { $rows[] = array( l(t($data-reg_no), round($data-total_payment,2), $data-prepared_by ); } $headers = array(t(' Reg Number'), t('Total Payment'),t('Prepared By')); $output =theme('table',$headers,$rows,$attributes); $output .= theme('pager', 1); // Not Working -- Paging $form['manufacturer_search']['table'] = array( '#type' = 'markup', '#value' = $output); The paging is not working. Any Idea why, please help

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• How to efficiently replace characters in XML document in Java?

  - by Pregzt

  I'm looking for a neat and efficient way to replace characters in XML document. There is a replacement table defined for almost 12.000 UTF-8 characters, most of them are to be replaced by single characters, but some must be replaced by two or even three characters (e.g. Greek theta should become TH). The documents can be bulky (100MB+). How to do it in Java? I came up with the idea of using XSLT, but I'm not too sure if this is the best option.

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• NSURL not instantiating properly

  - by taokakao

  Hi, I am new to IPhone developing. I have got very strange issue with NSURL which is driving me crazy. I want to instantiate NSURL object to use it in loading image. But instantiation never happens in proper way. It always says my url in invalid. Basically I use code like below: NSString *str = @"http://google.com"; NSURL *url = [NSURL URLWithString:str]; but I also have tried a lot of different modifications (with CFStringRef + CFURLCreateStringByAddingPercentEscapes and so on). All of them are not working for me. In debugger url is set to "Invalid". What it could be? I don't think this is algorithmic or environment issue. It could be about some settings? Have anyone any idea of what happens?

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• Longer Form Fields in Drupal

  - by Slinger Jansen

  I have a really silly problem that has cost me a load of time already. I have created a content template with a URL in there. When I look at the HTML code for it, I see a big fat "maxlength=256" in the form tag. I'd like to expand the length of this field, because my customer wishes to enter really long links (over 500 characters). Any idea how I can change it? When I do a generic search through the code I see so many occurences of 256, but the length might just as well be in the database somewhere. I have of course made the database field a longer varchar (1024 sounded poetic to me), so that's something I don't have to worry about. I think it's silly, but the customer's always right, as we know. I am using Drupal 6.14.

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• Change the state of a customized button (button with an image)?

  - by Harry Pham

  I know how to change the state of the regular button, as well as change the background color of a regular button. However, what I have is a image lay on top of a button (customized button). I want, when the user click on it, something visually would happen to let the user know that button is selected, and when the user click again it go back to the regular state. I try to change the background of the button, but it doesnt work since the image kind of cover the button. Any idea?

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• How to debug when CakePHP Model::save() doesn't attempt an INSERT

  - by RyOnLife

  I am having a bear of a time saving the simplest record from a model called ItemView: if($this->save($this->data)) { echo 'worked'; } else { echo 'failed'; } Where $this-data is: Array ( [ItemView] => Array ( [list_id] => 1 [user_id] => 1 ) ) And my table is: CREATE TABLE IF NOT EXISTS `item_views` ( `id` int(11) NOT NULL auto_increment, `list_id` int(11) NOT NULL, `user_id` int(11) default NULL, `user_ip` int(10) unsigned default NULL, `created` datetime NOT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 ROW_FORMAT=FIXED AUTO_INCREMENT=1 ; Looking at the query dump in debug mode, Cake isn't even attempting an INSERT, so I have no idea how to debug. Any help would be appreciated.

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• Bitmap in ImageView is cropped off the screen

  - by Computerish

  I'm working on an Android application that needs to download an image and display it inside an image view. The Bitmap is passed to the main java file and added to the image view like this: comic = (ImageView) findViewById(R.id.comic); comic.setImageBitmap(c.getImageBitmap()); This works, except that the left side of the image disappears off the screen. The ImageView is in a ScrollView and the scroll view maintains the correct size. This means that there is black space to the right in the ScrollView and the image is cut off to the left. The XML for the ImageView is this: <ScrollView android:layout_width="fill_parent" android:layout_height="fill_parent" Any idea why my image is being cut off? Thanks!

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• Rails 3: Validate combined values

  - by Cimm

  In Rails 2.x you can use validations to make sure you have a unique combined value like this: validates_uniqueness_of :husband, :scope => :wife In the corresponding migration it could look like this: add_index :family, [:husband, :wife], :unique => true This would make sure the husband/wife combination is unique in the database. Now, in Rails 3 the validation syntax changed and the scope attribute seems to be gone. It now looks like: validates :husband, :presence => true Any idea how I can achieve the combined validation in Rails 3? The Rails 2.x validations still work in Rails 3 so I can still use the first example but it looks so "old", are there better ways?

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• compute mean in python for a generator

  - by nmaxwell

  Hi, I'm doing some statistics work, I have a (large) collection of random numbers to compute the mean of, I'd like to work with generators, because I just need to compute the mean, so I don't need to store the numbers. The problem is that numpy.mean breaks if you pass it a generator. I can write a simple function to do what I want, but I'm wondering if there's a proper, built-in way to do this? It would be nice if I could say "sum(values)/len(values)", but len doesn't work for genetators, and sum already consumed values. here's an example: import numpy def my_mean(values): n = 0 Sum = 0.0 try: while True: Sum += next(values) n += 1 except StopIteration: pass return float(Sum)/n X = [k for k in range(1,7)] Y = (k for k in range(1,7)) print numpy.mean(X) print my_mean(Y) these both give the same, correct, answer, buy my_mean doesn't work for lists, and numpy.mean doesn't work for generators. I really like the idea of working with generators, but details like this seem to spoil things. thanks for any help -nick

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• Choosing connectionstring in VB.NET application at startup

  - by MatsT

  I have a VB.NET application with a connection to an SQL Server 2003. On the server there are two databases, MyDatabase and MyDatabase_Test. What I would like to do is to show a dialog when the program starts that let's the user choose which database to use. My idea is to create a new form as the starup form that sets this property and then launches the main form. Currently the connectionstring is specified in the application config file. Best would be if I can specify two different connection strings in that file to choose from, but for now it is also acceptable with other solutions like hardcoding the two connectionstrings into the startup form.

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• Blurred PNGs on UIView, using Interface Builder

  - by Christopher Stamper

  Hey everyone, I've added some UIImageViews with png images to my view, using interface builder. Initially they are added off-screen. Later, I animate them onto the screen with CoreAnimation, like so: [UIView beginAnimations:@"slide" context:nil]; [UIView setAnimationDuration:0.1f]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; [UIView setAnimationDelegate:self]; image.frame = CGRectMake(81+1, 390, 150, 80); [UIView commitAnimations]; Once they appear onscreen, they look really blurred or fuzzy. I've heard of this happening before. Does anyone have any idea how to fix it?

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• Qt compilation and stylesheet

  - by Yosko

  Each time I compile my Qt project after modifying my qss stylesheet file, the modifications aren't taken into account, unless I rebuild everything. Any idea on a workaround for this, so that I don't have to wait 5 minutes each time I change my qss ? Notes: I use Qt 4.8, and my stylsheet is declared in a resource file (qrc). EDIT: As suggested by Luca Carlon, when a qss is reference in the project through a .qrc file, the changes in the qss don't affect the qrc, and the compiler ignores it. To avoid that, I added a Custom Build Step to my project: before the qmake step! calls a .bat file without any argument the .bat contains the real command copy /b files.qrc +,,

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