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• Can't write the SysWow64 value to registry with vbscript for Screensaver

  - by Valentein

  Scripts, registries, screen-savers, oh my! I'm trying to use a screen-saver on a Windows XP 64 bit machine which uses a .NET app which makes an interop call which relies on some x86 Shockwave Dlls (some Shockwave animation). Everything should be in the %systemroot%\WINNT\SysWOW64 directory. When the timeout for the screensaver occurs, the process should looks like this: Screensaver.scr - .NET app - shockwave animation. During installation I want a vbscript to my screen-saver file to copy the Screensaver.scr to the SysWow64 directory and then set the proper registry key to this file for Windows to launch the screen-saver. The code is something like this: Dim sScreenSaver, tScreenSaver sScreenSaver = "C:\SourceFiles\bin\ScreenSaver.scr" 'screensaver tScreenSaver = "C:\winnt\SysWOW64\" Set WshShell = WScript.CreateObject("WScript.Shell") 'script shell to run objects Set FSO = createobject("scripting.filesystemobject") 'file system object 'copy screensaver FSO.CopyFile sScreenSaver, tScreenSaver, True 'set screen saver Dim p1 p1 = "HKEY_CURRENT_USER\Control Panel\Desktop\" WshShell.RegWrite p1 & "SCRNSAVE.EXE", (tScreenSaver & "ScreenSaver.scr") After installation, I can verify the the Screensaver exists in the correct directory. (It actually seems to be in both the system32 and the sysWOW64 directories---whether that's the install script or something I did post-install I'm in the process of verifying.) However, the registry entry is not correct. In both the 32 and 64 bit regedit I see the HKCU\ControlPanel\Desktop\SCRNSAVE.EX is set to: C:\WINNT\system32\Screensaver.scr This isn't right. The screen-saver won't run from this directory. It only runs from SysWOW64. If I manually edit the registry with regedit to the correct SysWOW64 path everything works fine. Is this a problem with using the script or is this a Windows registry redirection, or filesystem redirection problem? You'd think this would be simple...

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• FtpWebRequest Download File

  - by pm_2

  The following code is intended to retrieve a file via FTP. However, I'm getting an error with it. serverPath = "ftp://x.x.x.x/tmp/myfile.txt"; FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverPath); request.KeepAlive = true; request.UsePassive = true; request.UseBinary = true; request.Method = WebRequestMethods.Ftp.DownloadFile; request.Credentials = new NetworkCredential(username, password); // Read the file from the server & write to destination using (FtpWebResponse response = (FtpWebResponse)request.GetResponse()) // Error here using (Stream responseStream = response.GetResponseStream()) using (StreamReader reader = new StreamReader(responseStream)) using (StreamWriter destination = new StreamWriter(destinationFile)) { destination.Write(reader.ReadToEnd()); destination.Flush(); } The error is: The remote server returned an error: (550) File unavailable (e.g., file not found, no access) The file definately does exist on the remote machine and I am able to perform this ftp manually (i.e. I have permissions). Can anyone tell me why I might be getting this error?

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• RubyGems installation errors when using 'sudo' or not

  - by Kenny Peng

  I have a machine that is running Ubuntu Hardy, which provides its own RubyGems package. Unfortunately that version of RubyGems (1.1.1) is too old to do anything useful with, so I decided to manually update RubyGems to the current version (1.3.6). That part went smoothly, and if I do gem -v, I get 1.3.6 which is expected. The problem is when I try to do: sudo gem install rack, it returns this error: ERROR: While executing gem ... (Errno::EACCES) Permission denied - /home/username/.gem Usually when I install gems as root, it knows to install it into /usr/lib/ruby/gems, so why is it checking my home directory at all? Another quirk is when I do gem install rack (not as root), it says: ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /usr/lib/ruby/gems/1.8 directory. which is where I want it to go. I've already tried clearing source_caches, trying different versions of RubyGems (1.3.5), forcing installation into /usr/lib with -i to no avail. Any ideas on why RubyGems is so insistent on checking my /home directory when installing as root?

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• What are the primitive Forth operators?

  - by Barry Brown

  I'm interested in implementing a Forth system, just so I can get some experience building a simple VM and runtime. When starting in Forth, one typically learns about the stack and its operators (DROP, DUP, SWAP, etc.) first, so it's natural to think of these as being among the primitive operators. But they're not. Each of them can be broken down into operators that directly manipulate memory and the stack pointers. Later one learns about store (!) and fetch (@) which can be used to implement DUP, SWAP, and so forth (ha!). So what are the primitive operators? Which ones must be implemented directly in the runtime environment from which all others can be built? I'm not interested in high-performance; I want something that I (and others) can learn from. Operator optimization can come later. (Yes, I'm aware that I can start with a Turing machine and go from there. That's a bit extreme.) Edit: What I'm aiming for is akin to bootstrapping an operating system or a new compiler. What do I need do implement, at minimum, so that I can construct the rest of the system out of those primitive building blocks? I won't implement this on bare hardware; as an educational exercise, I'd write my own minimal VM.

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• Questions on usages of sizeof

  - by Appu

  Question 1 I have a struct like, struct foo { int a; char c; }; When I say sizeof(foo), i am getting 8 on my machine. As per my understanding, 4 bytes for int, 1 byte for char and 3 bytes for padding. Is that correct? Given a struct like the above, how will I find out how many bytes will be added as padding? Question 2 I am aware that sizeof can be used to calculate the size of an array. Mostly I have seen the usage like (foos is an array of foo) sizeof(foos)/sizeof(*foos) But I found that the following will also give same result. sizeof(foos) / sizeof(foo) Is there any difference in these two? Which one is preffered? Question 3 Consider the following statement. foo foos[] = {10,20,30}; When I do sizeof(foos) / sizeof(*foos), it gives 2. But the array has 3 elements. If I change the statement to foo foos[] = {{10},{20},{30}}; it gives correct result 3. Why is this happening? Any thoughts..

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• Migrating to web application with AjaxControlToolkit

  - by Chris

  Hi All, We are currently migrating our ASP.NET website to a web application in Visual Studio 2008. Most of the process has been fairly straight forward, but I have hit one block that is driving me a bit nuts. We are using the AjaxControlToolkit for some functionality, specifically an AutoControlExtender. When this is run locally through VS's development server the extender (dropdown) does not render after the service returns the resultset. However if I deploy the migrated solution to our UAT server the extender functions correctly. I have ensured the Ajax Control Toolkit is properly installed locally on my dev machine (and the dll available in the bin directory), and using debugging have ensured the service is called correctly and runs through without error (which it does). The web application was taken from a server running IIS7. Can anyone confirm if Visual Studio 2008 development server requires a different configuration to IIS 7 (as I believe IIS 6 requires a different configuration to IIS 7), and if there is a resource that provides more info? My own searches have turned up very little in this area. On the other hand, if I am looking in the wrong area any other tips would be appreciated. Thanks Chris

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• Should Development / Testing / QA / Staging environments be similar?

  - by Walter White

  Hi all, After much time and effort, we're finally using maven to manage our application lifecycle for development. We still unfortunately use ANT to build an EAR before deploying to Test / QA / Staging. My question is, while we made that leap forward, developers are still free to do as they please for testing their code. One issue that we have is half our team is using Tomcat to test on and the other half is using Jetty. I prefer Jetty slightly over Tomcat, but regardless we using WAS for all the other environments. My question is, should we develop on the same application server we're deploying to? We've had numerous bugs come up from these differences in environments. Tomcat, Jetty, and WAS are different under the hood. My opinion is that we all should develop on what we're deploying to production with so we don't have the problem of well, it worked fine on my machine. While I prefer Jetty, I just assume we all work on the same environment even if it means deploying to WAS which is slow and cumbersome. What are your team dynamics like? Our lead developers stepped down from the team and development has been a free for all since then. Walter

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• Seeking help with a MT design pattern

  - by SamG

  I have a queue of 1000 work items and a n-proc machine (assume n = 4).The main thread spawns n (=4) worker threads at a time ( 25 outer iterations) and waits for all threads to complete before processing the next n (=4) items until the entire queue is processed for(i= 0 to queue.Length / numprocs) for(j= 0 to numprocs) { CreateThread(WorkerThread,WorkItem) } WaitForMultipleObjects(threadHandle[]) The work done by each (worker) thread is not homogeneous.Therefore in 1 batch (of n) if thread 1 spends 1000 s doing work and rest of the 3 threads only 1 s , above design is inefficient,becaue after 1 sec other 3 processors are idling. Besides there is no pooling - 1000 distinct threads are being created How do I use the NT thread pool (I am not familiar enough- hence the long winded question) and QueueUserWorkitem to achieve the above. The following constraints should hold The main thread requires that all worker items are processed before it can proceed.So I would think that a waitall like construct above is required I want to create as many threads as processors (ie not 1000 threads at a time) Also I dont want to create 1000 distinct events, pass to the worker thread, and wait on all events using the QueueUserWorkitem API or otherwise Exisitng code is in C++.Prefer C++ because I dont know c# I suspect that the above is a very common pattern and was looking for input from you folks.

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• How to represent different entities that have identical behavior?

  - by Dominik

  I have several different entities in my domain model (animal species, let's say), which have a few properties each. The entities are readonly (they do not change state during the application lifetime) and they have identical behavior (the differ only by the values of properties). How to implement such entities in code? Unsuccessful attempts: Enums I tried an enum like this: enum Animals { Frog, Duck, Otter, Fish } And other pieces of code would switch on the enum. However, this leads to ugly switching code, scattering the logic around and problems with comboboxes. There's no pretty way to list all possible Animals. Serialization works great though. Subclasses I also thought about where each animal type is a subclass of a common base abstract class. The implementation of Swim() is the same for all Animals, though, so it makes little sense and serializability is a big issue now. Since we represent an animal type (species, if you will), there should be one instance of the subclass per application, which is hard and weird to maintain when we use serialization. public abstract class AnimalBase { string Name { get; set; } // user-readable double Weight { get; set; } Habitat Habitat { get; set; } public void Swim(); { /* swim implementation; the same for all animals but depends uses the value of Weight */ } } public class Otter: AnimalBase{ public Otter() { Name = "Otter"; Weight = 10; Habitat = "North America"; } } // ... and so on Just plain awful. Static fields This blog post gave me and idea for a solution where each option is a statically defined field inside the type, like this: public class Animal { public static readonly Animal Otter = new Animal { Name="Otter", Weight = 10, Habitat = "North America"} // the rest of the animals... public string Name { get; set; } // user-readable public double Weight { get; set; } public Habitat Habitat { get; set; } public void Swim(); } That would be great: you can use it like enums (AnimalType = Animal.Otter), you can easily add a static list of all defined animals, you have a sensible place where to implement Swim(). Immutability can be achieved by making property setters protected. There is a major problem, though: it breaks serializability. A serialized Animal would have to save all its properties and upon deserialization it would create a new instance of Animal, which is something I'd like to avoid. Is there an easy way to make the third attempt work? Any more suggestions for implementing such a model?

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• Classic ASP to WCF using the Service Moniker

  - by Jab

  I am trying to consume a WCF logging service from classic ASP without deploy a Com wrapper. I found a method of doing so here. Here is the vb script, simplified. Dim addr addr = "service:mexAddress=""net.pipe://localhost/Services/Logging/LoggingManager/Mex""," _ & "address=""net.pipe://localhost/Services/Logging/LoggingManager/classic/""," _ & "contract=""ILoggingManagerClassic"", contractNamespace=""http://Services.Logging.Classic/""," _ & "binding=""NetNamedPipeBinding_ILoggingManagerClassic"", bindingNamespace=""http://Services.Logging.Classic/""" set objErrorLogger = GetObject(addr) Dim strError : strError = objErrorLogger.LogError("blahblah") This works on Server 2008, but fails with this error on Server 2003. Failed to do mex retrieval:Metadata contains a reference that cannot be resolved: net.pipe://localhost/Services/Logging/LoggingManager/Mex.. Only when running through ASP does it fail, a sample VBS file on the same machine using the same code works fine. I think it may be permission related, but don't know where to begin. Anyone have any ideas? EDIT - let me clarify that the WCF host is a windows service running as NETWORK SERVICE. If this belongs on server fault, a moderator can move it. I have an account there as well.

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• rails + sheevaplug = rails home development server and more

  - by microspino

  Hello I'd like to build a "Rails Brick" using a Sheevaplug from Marvell (O.S. is Ubuntu out of the box but You can install other distributions on It). It will be a home server and a silent, low cost (99$) low energy development machine. I'd like to add rails RVM, lot of gems, git-based heroku like deployment, passenger + nginx. This way I could have a portable server with a complete development environment and maybe I could find a hosting company where I can co-locate a grid of this devices or I can sell It as a simple little server for 10 or less users offices, with some centralized rails services (I think to a CMS, a BLOG, a WIKI, calendar or whatever this little jewel could afford). The usb port could make It a print server too or a UMTS link to the web via HUAWEI like usb UMTS keys. Can you give me some hint about: Is this project a crazy-close-to-failure idea? Why? which gem would You include? which rails open source app would you suggest? I have already an Excito Bubba Server at home, I saw the TonidoPlug so It came up in my mind to build something similiar but Rails based (Bubba is PHP based, TonidoPlug I don't know but It does not seems a Rails thing).

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• A problem happened during install the ruby

  - by Alex

  I’m a freshman on Ruby and now trying to install ruby on my machine according to the Tutorial on http://wiki.openqa.org/display/WTR/Tutorial However, after I installed the ruby186-26, and run the command “gem update --system”, the following error occurred: C:\Documents and Settings\e482090\Desktopgem update --system c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initialize': Inval id argument - <Not Set>/.gemrc (Errno::EINVAL) from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:inopen' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initi alize' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:innew' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:in do_con figuration' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:25:inrun' from c:/ruby/bin/gem:23 C:\Documents and Settings\e482090\Desktopgem install watir c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initialize': Inval id argument - <Not Set>/.gemrc (Errno::EINVAL) from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:inopen' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initi alize' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:innew' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:in do_con figuration' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:25:inrun' from c:/ruby/bin/gem:23 Meanwhile, we have tried this on other machines and the result turned out ok. Thus, my question is why the error happened on my pc? Have you met this kind of error before?

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• Why can't I render objects to texture properly using FBO?

  - by Brett

  Hello, I'm trying to implement a simple program using 3 FBO's to render a scene to a texture and display a textured quad. I've successfully done this previously using fragment shaders before projecting to the textured quad but can't get it to work without a shader. What could be wrong? First I set up my textures glGenTextures(3, renderTextureID); for (GLint i = 0; i < 3; i++) { glBindTexture(GL_TEXTURE_2D, renderTextureID[i]); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // this may change with window size changes glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, fboWidth, fboHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); } Next some framebuffer state glGenFramebuffersEXT(3, framebufferID); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebufferID[0]); glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, renderTextureID[0], 0); GLenum fboStatus = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT); if(fboStatus != GL_FRAMEBUFFER_COMPLETE_EXT) { fprintf(stderr, "FBO Error!"); } glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebufferID[1]); glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, renderTextureID[1], 0); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebufferID[2]); glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, renderTextureID[2], 0); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); Then I render the scene glViewport(0, 0, fboWidth, fboHeight); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebufferID[0]); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); drawModels(); glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); glBindTexture(GL_TEXTURE_2D, renderTextureID[0]); glEnable(GL_SCISSOR_TEST); glViewport(windowWidth/2, 0, fboWidth, fboHeight); glScissor(windowWidth/2, 0, fboWidth, fboHeight); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glBegin(GL_QUADS); glTexCoord2i(0, 0); glVertex2f(-1.0f, -1.0f); glTexCoord2i(1, 0); glVertex2f(1.0f, -1.0f); glTexCoord2i(1, 1); glVertex2f(1.0f, 1.0f); glTexCoord2i(0, 1); glVertex2f(-1.0f, 1.0f); glEnd(); glDisable(GL_SCISSOR_TEST); glutSwapBuffers(); The result is a yellow square. Draw models draws yellow wireframe cubes if not using the FBO so the problem is not that. I've read a previous similar post that talks about using glTexParameterf after generating and binding textures but i've done this. Thanks...

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• T-SQL - Left Outer Joins - Filters in the where clause versus the on clause.

  - by Greg Potter

  I am trying to compare two tables to find rows in each table that is not in the other. Table 1 has a groupby column to create 2 sets of data within table one. groupby number ----------- ----------- 1 1 1 2 2 1 2 2 2 4 Table 2 has only one column. number ----------- 1 3 4 So Table 1 has the values 1,2,4 in group 2 and Table 2 has the values 1,3,4. I expect the following result when joining for Group 2: `Table 1 LEFT OUTER Join Table 2` T1_Groupby T1_Number T2_Number ----------- ----------- ----------- 2 2 NULL `Table 2 LEFT OUTER Join Table 1` T1_Groupby T1_Number T2_Number ----------- ----------- ----------- NULL NULL 3 The only way I can get this to work is if I put a where clause for the first join: PRINT 'Table 1 LEFT OUTER Join Table 2, with WHERE clause' select table1.groupby as [T1_Groupby], table1.number as [T1_Number], table2.number as [T2_Number] from table1 LEFT OUTER join table2 --****************************** on table1.number = table2.number --****************************** WHERE table1.groupby = 2 AND table2.number IS NULL and a filter in the ON for the second: PRINT 'Table 2 LEFT OUTER Join Table 1, with ON clause' select table1.groupby as [T1_Groupby], table1.number as [T1_Number], table2.number as [T2_Number] from table2 LEFT OUTER join table1 --****************************** on table2.number = table1.number AND table1.groupby = 2 --****************************** WHERE table1.number IS NULL Can anyone come up with a way of not using the filter in the on clause but in the where clause? The context of this is I have a staging area in a database and I want to identify new records and records that have been deleted. The groupby field is the equivalent of a batchid for an extract and I am comparing the latest extract in a temp table to a the batch from yesterday stored in a partioneds table, which also has all the previously extracted batches as well. Code to create table 1 and 2: create table table1 (number int, groupby int) create table table2 (number int) insert into table1 (number, groupby) values (1, 1) insert into table1 (number, groupby) values (2, 1) insert into table1 (number, groupby) values (1, 2) insert into table2 (number) values (1) insert into table1 (number, groupby) values (2, 2) insert into table2 (number) values (3) insert into table1 (number, groupby) values (4, 2) insert into table2 (number) values (4) EDIT: A bit more context - depending on where I put the filter I different results. As stated above the where clause gives me the correct result in one state and the ON in the other. I am looking for a consistent way of doing this. Where - select table1.groupby as [T1_Groupby], table1.number as [T1_Number], table2.number as [T2_Number] from table1 LEFT OUTER join table2 --****************************** on table1.number = table2.number --****************************** WHERE table1.groupby = 2 AND table2.number IS NULL Result: T1_Groupby T1_Number T2_Number ----------- ----------- ----------- 2 2 NULL On - select table1.groupby as [T1_Groupby], table1.number as [T1_Number], table2.number as [T2_Number] from table1 LEFT OUTER join table2 --****************************** on table1.number = table2.number AND table1.groupby = 2 --****************************** WHERE table2.number IS NULL Result: T1_Groupby T1_Number T2_Number ----------- ----------- ----------- 1 1 NULL 2 2 NULL 1 2 NULL Where (table 2 this time) - select table1.groupby as [T1_Groupby], table1.number as [T1_Number], table2.number as [T2_Number] from table2 LEFT OUTER join table1 --****************************** on table2.number = table1.number AND table1.groupby = 2 --****************************** WHERE table1.number IS NULL Result: T1_Groupby T1_Number T2_Number ----------- ----------- ----------- NULL NULL 3 On - select table1.groupby as [T1_Groupby], table1.number as [T1_Number], table2.number as [T2_Number] from table2 LEFT OUTER join table1 --****************************** on table2.number = table1.number --****************************** WHERE table1.number IS NULL AND table1.groupby = 2 Result: T1_Groupby T1_Number T2_Number ----------- ----------- ----------- (0) rows returned

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• EF 4.0 : Save Changes Retry Logic

  - by BGR

  Hi, I would like to implement an application wide retry system for all entity SaveChanges method calls. Technologies: Entity framework 4.0 .Net 4.0 namespace Sample.Data.Store.Entities { public partial class StoreDB { public override int SaveChanges(System.Data.Objects.SaveOptions options) { for (Int32 attempt = 1; ; ) { try { return base.SaveChanges(options); } catch (SqlException sqlException) { // Increment Trys attempt++; // Find Maximum Trys Int32 maxRetryCount = 5; // Throw Error if we have reach the maximum number of retries if (attempt == maxRetryCount) throw; // Determine if we should retry or abort. if (!RetryLitmus(sqlException)) throw; else Thread.Sleep(ConnectionRetryWaitSeconds(attempt)); } } } static Int32 ConnectionRetryWaitSeconds(Int32 attempt) { Int32 connectionRetryWaitSeconds = 2000; // Backoff Throttling connectionRetryWaitSeconds = connectionRetryWaitSeconds * (Int32)Math.Pow(2, attempt); return (connectionRetryWaitSeconds); } /// <summary> /// Determine from the exception if the execution /// of the connection should Be attempted again /// </summary> /// <param name="exception">Generic Exception</param> /// <returns>True if a a retry is needed, false if not</returns> static Boolean RetryLitmus(SqlException sqlException) { switch (sqlException.Number) { // The service has encountered an error // processing your request. Please try again. // Error code %d. case 40197: // The service is currently busy. Retry // the request after 10 seconds. Code: %d. case 40501: //A transport-level error has occurred when // receiving results from the server. (provider: // TCP Provider, error: 0 - An established connection // was aborted by the software in your host machine.) case 10053: return (true); } return (false); } } } The problem: How can I run the StoreDB.SaveChanges to retry on a new DB context after an error occured? Something simular to Detach/Attach might come in handy. Thanks in advance! Bart

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• capture data from FORM using jquery/ajax/json

  - by nisardotnet

  i have few textbox on the form and when the user submit i want to capture the data and insert into db here is what my code looks like beforeSubmit: function(data) { // called just before the form is submitted var item = $("[id$='item']"); var category = $("[id$='category']"); var record = $("[id$='record']"); var json = "{'ItemName':'" + escape(item.val()) + "','CategoryID':'" + category.val() + "','RecordID':'" + record.val() + "'}"; var ajaxPage = "DataProcessor.aspx?Save=1"; //this page is where data is to be retrieved and processed var options = { type: "POST", url: ajaxPage, data: json, contentType: "application/json;charset=utf-8", dataType: "json", async: false, success: function(response) { alert("success: " + response); }, error: function(msg) { alert("failed: " + msg); } }; //execute the ajax call and get a response var returnText = $.ajax(options).responseText; if (returnText == 1) { record.html(returnText); $("#divMsg").html("<font color=blue>Record saved successfully.</font>"); } else { record.html(returnText); $("#divMsg").html("<font color=red>Record not saved successfully.</font>"); } // $("#data").html("<font color=blue>Data sent to the server :</font> <br />" + $.param(data)); }, here is what is the Data sent to the server: if i uncomment this line: // $("#data").html("Data sent to the server : " + $.param(data)); _VIEWSTATE=%2FwEPDwULLTE4ODM1ODM4NDFkZOFEQfA7cHuTisEwOQmIaj1nYR23&_EVENTVALIDATION=%2FwEWDwLuksaHBgLniKOABAKV8o75BgLlosbxAgKUjpHvCALf9YLVCgLCtfnhAQKyqcC9BQL357nNAQLW9%2FeuDQKvpuq2CALyveCRDwKgoPWXDAKhwImNCwKiwImNC1%2Fq%2BmUXqcSuJ0z0F%2FQXKM3pH070&firstname=Nisar&surname=Khan&day_fi=12&month_fi=12&year_fi=1234&lastFour_fi=777&countryPrefix_fi=1&areaCode_fi=555-555&phoneNumber_fi=5555&email_fi=nisardotnet%40gmail.com&username=nisarkhan&password=123456&retypePassword=123456 DataProcessor.aspx.cs: public partial class DataProcessor : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) ProcessAjaxRequest(); } private void ProcessAjaxRequest() { if (Request.ContentType.Contains("json") && Request.QueryString["Save"] != null) SaveMyData(); } private void SaveMyData() { //data passed in as JSON format System.IO.StreamReader sr = new System.IO.StreamReader(Request.InputStream); string line = ""; line = sr.ReadToEnd(); //This is all you need to parse JSON string into an JObject. //Require namespace Newtonsoft.Json.Linq; JObject jo = JObject.Parse(line); Console.WriteLine((string)jo["RecordID"]); Console.WriteLine(Server.UrlDecode((string)jo["ItemName"])); //use Server.UrlDecode to reverse the text that was escaped before it was passed in to its original state Response.Write((string)jo["CategoryID"]); //this send to responseText of .ajax(options).responseText } } the above code is not working and i need a way to capture the values before i insert into db. any help? Thanks.

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• System architecture: simple approach for setting up background tasks behind a web application -- wil

  - by Tim Molendijk

  I have a Django web application and I have some tasks that should operate (or actually: be initiated) on the background. The application is deployed as follows: apache2-mpm-worker; mod_wsgi in daemon mode (1 process, 15 threads). The background tasks have the following characteristics: they need to operate in a regular interval (every 5 minutes or so); they require the application context (i.e. the application packages need to be available in memory); they do not need any input other than database access, in order to perform some not-so-heavy tasks such as sending out e-mail and updating the state of the database. Now I was thinking that the most simple approach to this problem would be simply to piggyback on the existing application process (as spawned by mod_wsgi). By implementing the task as part of the application and providing an HTTP interface for it, I would prevent the overhead of another process that is holding all of the application into memory. A simple cronjob can be setup that sends a request to this HTTP interface every 5 minutes and that would be it. Since the application process provides 15 threads and the tasks are quite lightweight and only running every 5 minutes, I figure they would not be hindering the performance of the web application's user-facing operations. Yet... I have done some online research and I have seen nobody advocating this approach. Many articles suggest a significantly more complex approach based on a full-blown messaging component (such as Celery, which uses RabbitMQ). Although that's sexy, it sounds like overkill to me. Some articles suggest setting up a cronjob that executes a script which performs the tasks. But that doesn't feel very attractive either, as it results in creating a new process that loads the entire application into memory, performs some tiny task, and destroys the process again. And this is repeated every 5 minutes. Does not sound like an elegant solution. So, I'm looking for some feedback on my suggested approach as described in the paragraph before the preceeding paragraph. Is my reasoning correct? Am I overlooking (potential) problems? What about my assumption that application's performance will not be impeded?

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• Rails 2.3.11 Server Crashing After 4 Requests

  - by Taka

  I have a Rails 2.3.11 application running on my local Windows machine using InstantRails. I cd to my application directory, run ruby script/server to start the server running, and point my browser to localhost:3000. I get the page I expect, and am able to click a few links to other pages (all of them are static). The problem starts when I load the 4th page or so. My server crashes, with this message: Processing HomeController#index (for 127.0.0.1 at 2012-06-23 15:48:40) [GET] Rendering template within layouts/application Rendering home/index Completed in 11ms (View: 9, DB: 1) | 200 OK [http://localhost/index] C:/rails/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.11/lib/active_support/memoizable.rb:46: [BUG] Segmentation fault ruby 1.8.7 (2012-02-08 patchlevel 358) [i386-mingw32] This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. I've uninstalled this gem and reinstalled it, which didn't help. It doesn't seem to be the gem though, because the segmentation fault sometimes occurs in C:/rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:114 or C:/rails/ruby/lib/ruby/1.8/benchmark.rb:306 Versions: >ruby -v ruby 1.8.7 (2012-02-08 patchlevel 358) [i386-mingw32] >rails -v Rails 2.3.11 I'd like to get this fixed so while I'm developing I don't have to keep restarting my server. Any suggestions?

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• VSTS test deployment and invalid assembly culture

  - by Merlyn Morgan-Graham

  I have a DLL that I'm testing, which links to a DLL that has what I think is an invalid value for AssemblyCulture. The value is "Neutral" (notice the upper-case "N"), whereas the DLL I'm testing, and every other DLL in my project, has a value of "neutral" (because they specify AssemblyCulture("")). When I try to deploy the DLL that links to the problem DLL, I get this error in VSTS: Failed to queue test run '...': Culture is not supported. Parameter name: name Neutral is an invalid culture identifier. <Exception>System.Globalization.CultureNotFoundException: Culture is not supported. Parameter name: name Neutral is an invalid culture identifier. at System.Globalization.CultureInfo..ctor(String name, Boolean useUserOverride) at System.Globalization.CultureInfo..ctor(String name) at System.Reflection.RuntimeAssembly.GetReferencedAssemblies(RuntimeAssembly assembly) at System.Reflection.RuntimeAssembly.GetReferencedAssemblies() at Microsoft.VisualStudio.TestTools.Utility.AssemblyLoadWorker.ProcessChildren(Assembly assembly) at Microsoft.VisualStudio.TestTools.Utility.AssemblyLoadWorker.GetDependentAssemblies(String path) at Microsoft.VisualStudio.TestTools.Utility.AssemblyLoadWorker.GetDependentAssemblies(String path) at Microsoft.VisualStudio.TestTools.Utility.AssemblyLoadStrategy.GetDependentAssemblies(String path) at Microsoft.VisualStudio.TestTools.Utility.AssemblyHelper.GetDependentAssemblies(String path, DependentAssemblyOptions options, String configFile) at Microsoft.VisualStudio.TestTools.TestManagement.DeploymentManager.GetDependencies(String master, String configFile, TestRunConfiguration runConfig, DeploymentItemOrigin dependencyOrigin, List`1 dependencyDeploymentItems, Dictionary`2 missingDependentAssemblies) at Microsoft.VisualStudio.TestTools.TestManagement.DeploymentManager.DoDeployment(TestRun run, FileCopyService fileCopyService) at Microsoft.VisualStudio.TestTools.TestManagement.ControllerProxy.SetupTestRun(TestRun run, Boolean isNewTestRun, FileCopyService fileCopyService, DeploymentManager deploymentManager) at Microsoft.VisualStudio.TestTools.TestManagement.ControllerProxy.SetupRunAndListener(TestRun run, FileCopyService fileCopyService, DeploymentManager deploymentManager) at Microsoft.VisualStudio.TestTools.TestManagement.ControllerProxy.QueueTestRunWorker(Object state)</Exception> Even if I don't link to the DLL (in my VSTS wrapper test, or in the NUnit test), as soon as I add it in my GenericTest file (I'm wrapping NUnit tests), I get that exception. We don't have the source for the problem DLL, and it is also code signed, so I can't solve this by recompiling. Is there a way to skip deploying the dependencies of a DLL DeploymentItem, to fix or disable the culture check, or to work around this by convoluted means (maybe somehow embed the assembly)? Is there a way to override the value for the culture, short of hacking the DLL (and removing code signing so the hack works)? Maybe with an external manifest? Any correct solution must work without weird changes to production code. We can't deploy a hacked DLL, for example. It also must allow the DLL to be instrumented for code coverage. Additional note: I do get a linker warning when compiling the DLL under test that links to the problem DLL, but this hasn't broken anything but VSTS, and multiple versions have shipped.

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• Python doctest error

  - by user74283

  Hi I recently started experimenting with python currently reading "Think like a computer scientist: Learning python v2nd edition" I have been having some trouble with doctest. I use a windows 7 machine and Eclipse IDE with pydev. My question is when i run the script below i get the error below. Said script is below the the error message Traceback (most recent call last): File "C:\Users\shaytac\PythonProjects\test.py", line 21, in doctest.testmod() File "C:\Python26\lib\doctest.py", line 1829, in testmod for test in finder.find(m, name, globs=globs, extraglobs=extraglobs): File "C:\Python26\lib\doctest.py", line 852, in find self._find(tests, obj, name, module, source_lines, globs, {}) File "C:\Python26\lib\doctest.py", line 906, in _find globs, seen) File "C:\Python26\lib\doctest.py", line 894, in _find test = self._get_test(obj, name, module, globs, source_lines) File "C:\Python26\lib\doctest.py", line 978, in _get_test filename, lineno) File "C:\Python26\lib\doctest.py", line 597, in get_doctest return DocTest(self.get_examples(string, name), globs, File "C:\Python26\lib\doctest.py", line 611, in get_examples return [x for x in self.parse(string, name) File "C:\Python26\lib\doctest.py", line 573, in parse self._parse_example(m, name, lineno) File "C:\Python26\lib\doctest.py", line 631, in _parse_example self._check_prompt_blank(source_lines, indent, name, lineno) File "C:\Python26\lib\doctest.py", line 718, in _check_prompt_blank line[indent:indent+3], line)) ValueError: line 2 of the docstring for main.compare lacks blank after : 'compare(5, 4) ' def compare(a, b): """ >>>compare(5, 4) 1 >>>compare(7, 7) 0 >>>compare(2, 3) -1 >>>compare(42, 1) 1 """ if a > b : return 1 if a == b : return 0 if a < b : return -1 if __name__ == '__main__': import doctest doctest.testmod()

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• Padding is invalid and cannot be removed

  - by Ajay

  I have hosted an asp.net 2.0 site. Everyday, i am getting an error "Padding is invalid and cannot be removed" 2-3 times. Backend used is sql server 2005. the site is controlled via plesk 9.2 CP. Pooling is enabled with timeout as 120 Minutes, in IIS. Can it be the reason for this? I have not used any encryption except for the stored passwords(MD5) The error message is : " Base Exception = : Padding is invalid and cannot be removed. - Source : System.Web - TargetSite :Void ThrowError(System.Exception, System.String, System.String, Boolean)Message : Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster. " & System Log (Application) says " Event code: 4009 Event message: Viewstate verification failed. Reason: The viewstate supplied failed integrity check. Event detail code: 50203 ViewStateException information: Exception message: Invalid viewstate. Port: 31235 User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) " I have hosted it in a dedicated server and not in a web farm. Will keeping a static machine key help resolve this issue? Please guide me on this.

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• "QFontEngine(Win) GetTextMetrics failed ()" error on 64-bit Windows

  - by David Murdoch

  I'll add 500 of my own rep as a bounty when SO lets me. I'm using wkhtmltopdf to convert HTML web pages to PDFs. This works perfectly on my 32-bit dev server [unfortunately, I can't ship my machine :-p ]. However, when I deploy to the web application's 64-bit server the following errors are displayed: C:\>wkhtmltopdf http://www.google.com google.pdf Loading pages (1/5) QFontEngine::loadEngine: GetTextMetrics failed () ] 10% QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngine::loadEngine: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () QFontEngine::loadEngine: GetTextMetrics failed () ] 36% QFontEngineWin: GetTextMetrics failed () QFontEngineWin: GetTextMetrics failed () // ...etc.... and the PDF is created and saved... just WITHOUT text. All form-fields, images, borders, tables, divs, spans, ps, etc are rendered accurately...just void of any text at all. Server information: Windows edition: Windows Server Standard Service Pack 2 Processor: Intel Xeon E5410 @ 2.33GHz 2.33 GHz Memory: 8.00 GB System type: 64-bit Operating System Can anyone give me a clue as to what is happening and how I can fix this? Also, I wasn't sure what to tag/title this question with...so if you can think of better tags/title comment them or edit the question. :-)

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• Compiling Visual c++ programs from the command line and msvcr90.dll

  - by Stanley kelly

  Hi, When I compile my Visual c++ 2008 express program from inside the IDE and redistribute it on another computer, It starts up fine without any dll dependencies that I haven't accounted for. When I compile the same program from the visual c++ 2008 command line under the start menu and redistribute it to the other computer, it looks for msvcr90.dll at start-up. Here is how it is compiled from the command line cl /Fomain.obj /c main.cpp /nologo -O2 -DNDEBUG /MD /ID:(list of include directories) link /nologo /SUBSYSTEM:WINDOWS /ENTRY:mainCRTStartup /OUT:Build\myprogram.ex e /LIBPATH:D:\libs (list of libraries) and here is how the IDE builds it based on the relevant parts of the build log. /O2 /Oi /GL /I clude" /I (list of includes) /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_UNICODE" /D "UNICODE" /FD /EHsc /MD /Gy /Yu"stdafx.h" /Fp"Release\myprogram" /Fo"Release\\" /Fd"Release\vc90.pdb" /W3 /c /Zi /TP /wd4250 /vd2 Creating command line "cl.exe @d:\myprogram\Release\RSP00000118003188.rsp /nologo /errorReport:prompt" /OUT:"D:\myprgram\Release\myprgram.exe" /INCREMENTAL:NO /LIBPATH:"d:\gtkmm\lib" /MANIFEST /MANIFESTFILE:"Release\myprogam.exe.intermediate.manifest" /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /DEBUG /PDB:"d:\myprogram\Release\myprogram.pdb" /SUBSYSTEM:WINDOWS /OPT:REF /OPT:ICF /LTCG /ENTRY:"mainCRTStartup" /DYNAMICBASE /NXCOMPAT /MACHINE:X86 (list of libraries) Creating command line "link.exe @d:\myprogram\Release\RSP00000218003188.rsp /NOLOGO /ERRORREPORT:PROMPT" /outputresource:"..\Release\myprogram.exe;#1" /manifest .\Release\myprogram.exe.intermediate.manifest Creating command line "mt.exe @d:\myprogram\Release\RSP00000318003188.rsp /nologo" I would like to be able to compile it from the command line and not have it look for such a late version of the runtime dll, like the version compiled from the IDE seems not to do. Both versions pass /MD to the compiler, so i am not sure what to do.

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• How can I use Web Services Core to send a complex type as a parameter to a SOAP API method

  - by Matthew Brindley

  I don't do much Cocoa programming, so I'm probably missing something obvious, so please excuse the basic question. I have a SOAP method that expects a complex type as a paramater. Here's some WSDL: <s:element name="SaveTestResult"> <s:complexType> <s:sequence> <s:element minOccurs="0" maxOccurs="1" name="result" type="tns:TestItemResponse" /> </s:sequence> </s:complexType> </s:element> Here's the definition of the complex type "TestItemResponse": <s:complexType name="TestItemResponse"> <s:sequence> <s:element minOccurs="1" maxOccurs="1" name="TestItemRequestId" type="s:int" /> <s:element minOccurs="1" maxOccurs="1" name="ExternalId" type="s:int" /> <s:element minOccurs="0" maxOccurs="1" name="ApiId" type="s:string" /> <s:element minOccurs="0" maxOccurs="1" name="InboxGuid" type="s:string" /> <s:element minOccurs="0" maxOccurs="1" name="SpamResult" type="tns:SpamResult" /> <s:element minOccurs="0" maxOccurs="1" name="ResultImageSet" type="tns:ResultImageSet" /> <s:element minOccurs="1" maxOccurs="1" name="ExclusiveUseMailAccountId" type="s:int" /> <s:element minOccurs="1" maxOccurs="1" name="State" type="tns:TestItemResponseState" /> <s:element minOccurs="0" maxOccurs="1" name="ErrorShortDescription" type="s:string" /> <s:element minOccurs="0" maxOccurs="1" name="ErrorFullDescription" type="s:string" /> </s:sequence> </s:complexType> I've been using Web Services Core to call a SOAP API method that requires a simple string param, that works great. That same method returns a complex type which WSC converted into nested NSDictionaries, so no problems there. So I assumed I'd be able to convert my local TestItemResponse class into an NSDictionary and then use that as the complex type param. It almost worked, but unfortunately WSC set the object's type as "Dictionary", instead of "TestItemResponse", and the server complained. <TestItemResponse xsi:type=\"SOAP-ENC:Dictionary\"> <ErrorFullDescription xsi:type=\"xsd:string\">foo</ErrorFullDescription> ... I can't seem to find anything that allows you to override the type WSC assigns to the element in the SOAP XML. I've been using code adapted from here, I'm happy to list it, it's just quite long and this is already the longest SO question I've ever posted.

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• Usage of putty in command line from Hudson

  - by kij

  Hi, I'm trying to use putty in command line from an hudson job. The command is the following one: putty -ssh -2 -P 22 USERNAME@SERVER_ADDR -pw PASS -m command.txt Where 'command.txt' is a shell script to execute in the server through SSH. If i launch this command from the Window command prompt, it works, the shell script is executed on the server machine. If i launch a build of the hudson job configured with this batch command, it doesn't work. The build is running... and running... and running.. without doing anything, and i have to stop it manually. So my question is: Is it possible to launch an external programm (i.e. putty) from an hudson job ? ps: i tried SSH plugin but... not a really good plugin (pre/post build, fail status of the commands launched not caught by hudson, etc.) Thanks in advance for your help. Best regards. kij EDIT: These are the build logs: [workspace] $ cmd /c call C:\WINDOWS\TEMP\hudson7429256014041663539.bat C:\Hudson\jobs\Artifact deployer\workspace>putty -ssh -2 -P 22 USER@SERV_ADD -pw PASS -m com.txt Le build a été annulé Finished: ABORTED And the Hudson.err.log file at the same time (after a stop): 3 juin 2010 18:27:28 hudson.model.Run run INFO: Artifact deployer #6 aborted java.lang.InterruptedException at java.lang.ProcessImpl.waitFor(Native Method) at hudson.Proc$LocalProc.join(Proc.java:179) at hudson.Launcher$ProcStarter.join(Launcher.java:278) at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:83) at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:58) at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19) at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:601) at hudson.model.Build$RunnerImpl.build(Build.java:174) at hudson.model.Build$RunnerImpl.doRun(Build.java:138) at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:416) at hudson.model.Run.run(Run.java:1241) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:124) My shell script only write "hello" in a "hello.txt" file on the server, and nothing is done.

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