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• Jabber client for windows 7

  - by Anders

  I am looking for a jabber client with some specific functions. I have spent 1½ day looking for one and it is getting tiresome. Clients that I have been using, that have what I need, but I am not interesting for a reason in are: Pidgin, does not show complete messages in their popups. Miranda IM, I have a constant disconnect issue that does not seem to be resolved in my case. What I need are: Popups A popup that shows broadcasts to users. A popup that show when my username is typed in a conference chat. I need to be able to view the full message in the popup. No configuration of a theme to make this enabled, or if there is a working theme for it already. Preferable placement is on the top right of the screen. Able to 'popup' when running full screen applications, much like games. Conferences Easy access to bookmarked conferences. I do not want to go through submenus to rejoin a disconnected or closed conference. If I close the conference window I want to be connected to the conference until I exit the client. Tabbed interface. Configuration Sober configurations, options are great but there is a limit and the above needs to be availble in the options in a understandable manner. What I wish for: MSN Not needed! If it is avaible then it is a big plus. Facebook Not needed! If it is avaible then it is a big plus. Conferences/chats Not needed! Eyecandy is always nice.

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• Python 2.7 and Ubuntu 10.10: X11 fails

  - by c.a.p.

  Against every recommendation I have apt-get remove python in Ubuntu 10.10 (build 2.6.24-29-server x86_64) and apt-get install python2.7 Some built-in software with python2.6 dependencies (like firefox, other minor stuff) was fixed just by apt-get reinstalling or reinstalling from source and the system was stable for one day until I rebooted. Upon booting I got the message "ubuntu is running in low-graphics mode" I have an NVIDIA Quadro NVS 295 256 running on a HP Z600 Workstation so I sudoed: apt-get --purged nvidia* apt-get --purged xserver apt-get install linux-headers-generic apt-get install nvidia-* apt-get install xserver-xorg dpkg-reconfigure xserver-xorg nvidia-xconfig upon rebooting i get the same "ubuntu is running in low-graphics mode" if I decide to tell the boot menu to restart X, the Ubuntu 10.10 "load screen" shows up and does not do anything for hours. If I "X" the screen remains black for hours; ctrl-c shows that /etc/X11/xorg.conf did not produce any errors just a warning "Type "ONE_LEVEL"...". /var/log/Xorg.0.log issues the following warnings (no errors) (WW) AllowEmptyInput is on (WW) NVIDIA(0): UBB is incompatible If I "startX" I get /usr/bin/python: can't find '__main__.py"' in '/usr/share/command-not-found' Before re-installing xserver-xorg however "startX" ran, just by changing the resolution of the tty1 console. Any hints?

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• computer randomly restarting. both in game and out of game

  - by eric

  first my specs are. AMD Phenom II x4 955 processor 3.2ghz 20gb ddr3 ram 4Gb Nvidia Geforce GTX 770 850w Corsair tx850w psu Gigabyte ud3 mobo Windows 7 professional I recently uprgraded my vid card to gtx770 and upgraded my psu to the 850w thats in it now. i did a reformat with the installation of the new gpu and psu and started fresh and only have a couple programs installed (diablo3, nvidia control panel, wow, and steam). all drivers are up to date and everything is hooked up correctly. the problem is it will randomly shut down. no blue screen. just turns itself straight off and reboots after a couple seconds. occasionally i will have to unplug the power cable from the psu for a few minutes then reconnect and it will start up. it seems pretty random. sometimes it does it when my pc is just sitting there on the home screen. and sometimes it does it during games. and sometimes it doesnt do it for days at a time. i noticed the psu felt hot so i put an extra fan blowing straight onto both the psu and gpu and neither feel overly hot after it shuts down now. could it just be that it is a psu problem. the psu was taken from another machine but wasnt having this problem in that machine. i have seen a few articles online about gtx770 doing the same thing. but i havent found any answers or solutions. any help will be appreciated. im sure the 850w is enough to power my machine, im just stumped and ran out of ideas to fix it. i have even returned the video card for another thinking it might have been an issue with that particular card, but still gettin the same problem.

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• Browser: Randomly Opens Pages in New Windows Without Reason?

  - by Mark R

  This is a very strange thing I've noticed on my computer and past computers over this past year or more. I know when page are meant to open in a new Window and know which settings to use on my browser for this. But on both my browsers Chrome and Firefox, I have this really strange issue. I'm starting to think it's a hacker. When I right click links and select Open Link in New Tab, sometimes they will randomly open in a new window and today it is happening a lot. Like lots and lots. I'm getting really creeped out by it and YES I understand when a link opens in a new window and when it isn't supposed to. And none of these links are meant to open in a new Window. Let me give you an example: I searched Google about my issue and clicked on the result that I thought good. It opened in a new tab but half way through loading in new tab it opens into a new window. Recently, I decided to record my screen and while recording my screen using Camtasia, the issue stops. When I stop recording it starts again, as if it's a human operated issue. VERY strange. This has been going on for months on my old and new computer and on both Firefox and Chrome. Is there something I can do to fix this intermittent problem?

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• Mysql showing some high spikes

  - by user111196

  We one mysql server suddenly the access to it becomes slow of out sudden. So I read some place they said maybe due to var size is it? I am not too sure any idea how to check the root cause of it. The cpu is like nearly 150%. Any indication on it. I have tried this so far. du -sh * 4.0K account 67M cache 4.0K cvs 16K db 8.0K empty 4.0K games 4.0K gdm 148G lib 4.0K local 16K lock 624M log 0 mail 4.0K nis 4.0K opt 4.0K preserve 400K run 298M spool 4.0K tmp 359M www 12K yp

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• How to do safely test Biztalk app by manipulating the Windows OS system time w/o breaking the Active Directory?

  - by melaos

  i have a biztalk - window service tied middleware application which talks to other system. recently we had a request to test for scenarios which relates to the date. as we have a lot of places in the application which uses the .net Datetime.Now value, we don't really want to go into the code level and change all these values. so we're looking at the simplest way to test which is to just change the OS time. but what we notice is that sometimes when we change the system date time, we will get account lock out due to Active Directory. So my question is what's a good and safe way that i can test for future dates, etc by changing the windows OS system date time but without causing any issues with the Active Directory. And where can i find out more about AD and how it issues token and what's the correlation with the system date time changes. Thanks! ~m

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• Running suspicious X programs in GNU/Linux

  - by Vi

  What the most harmful thing can malware program started as separate limited user account do if it has access to the X server? Network and filesystem things are already considered by chroot and netfilter. It obviously can lock the screen and I will need to switch to other vt and kill it manually. Can it for example disrupt other GUI programs on the same X server (access to root terminal in nearby window)? I know that it is safer to run it in separate X server, for example, in Xtightvnc or even some virtual machine, but how dangerous is to just run it like other programs?

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• Hp Pavilion dv6000 wont boot right and freezes

  - by MalwareManiac

  I have an hp pavilion dv6000 that was having windows issues recently including randomly freezing. I eventually concluded that the hard drive was bad (And I was correct as the bad drive started making funny noises and quit working soon after). So I replaced it with a known good drive and put windows on it and it worked for a few hours. After a few restarts startup didn't even make it to the login screen. It just stays at a lighted black screen until I restarted. After another restart it made it to windows but then froze after a few minutes. A few more restarts yielded one of these two results. Like I mentioned earlier I have a know good drive in it and I also replaced the memory that was in it with a know good stick along with running memtest with no errors. So What does that leave? a corrupted windows installation? Motherboard? CPU? Any ideas?

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• Realtime website slowness (PHP/MYSQL)

  - by 3s2ng

  We got a website with realtime transactions. The past few days we experienced some slowness during a period of time. Usually the slowness last for 5 minutes. And also during the slowness we noticed that sometimes we can not connect to SSH and FTP or sometimes very slow to connect to those services. Currently we are trying to identify the issue. We already setup database monitoring tool. Now are about to signup with pingdom.com My question is. If the website is too slow due to the database (table or row lock) will it affect the other services like SSH and FTP? Does the ping correlates the page load and the connection between my PC and server? Thanks, Mark

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• Can no longer duplicate display to external monitor on Windows 7

  - by rbeier

  We have a large TV at work - I connect my laptop to it to share my screen during meetings. Until today, my laptop display has been duplicating to the TV automatically when I connect the TV cable to the laptop. The display resolution would decrease automatically to be compatible with the TV. Today, however, it's stopped working. When I connect the cable to the TV, the display extends rather than duplicating. Using the Win+P key combination (or Fn+F7 on my Lenovo laptop), I can choose to duplicate the display - but when I do this, it ends up only displaying on the laptop. I can get it to display on the TV by hitting Win+P and choosing "projector only", but then I can't see what I'm doing on the laptop screen. I have a Lenovo W520 laptop running Windows 7, connected to the TV using a DisplayPort-to-HDMI converter cable. The TV's native resolution is 1280x720; the laptop's native resolution is 1600x900. I've tried booting with the TV cable already connected; I've tried manually lowering the display resolution on the laptop to 1280x720 before duplicating the display. Neither works. Does anyone have any other suggestions?

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• When I try to install Windows 7 on dell inspiron 1420 which came with Ubuntu freezes at the beginnin

  - by draganstankovic

  I have searched many forums and tried a lot of suggested solutions but nothing works. I am sure that installation disk is ok cause it worked before (I was able to install Windows7 on my other notebook - MSI). What happens is: I boot with installation CD, it says 'Windows is loading files...' Then it says Starting Windows (mouse laser works at that moment). Then I get the screen with window which has a title "Install Windows" with options to choose language, keyboard, etc. and asking me to click next. But, the problem is that at that moment mouse and keyboard don't work at all. Mouse's laser is turned off, and if I press CAPS LOCK on keyboard it doesn't turn the LED on. Do you have any suggestions? Thanks!

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• having public computers without joining the domain

  - by MCarter

  Good Morning, I would like to know what is the best arrangement for setting up 24 computers at a facility. We do not want these computers to join our domain because of security concerns. We plan on having these public computers connect to our wifi network. If anyone knows of the best way to approach this, that would be great! We also need to add printers to these public computers. We would also like to lock each computer down. Since we are not connecting by network, I assume we would have to configure each group policy.

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• Cause of laptop only booting once every 3-10 times

  - by user16441

  My 3-year old Asus EEE laptop has been working flawlessly in the past, but in the last week it has started behaving oddly. When I boot, one of the following happens: Screen remains totally black. Absolutely nothing comes up. I need to retry booting. (Happens 70% of the time). Laptop starts regular boot. However, somewhere during the boot process it goes black and I need to retry (20% of the time). Screen turning black is more likely when I move the laptop around during boot. Laptop boots properly. Once booted, all is fine. But I'm afraid to turn it off and have been keeping the laptop running till the night. Additional details: All normal lights light up when I boot; whichever of the scenarios goes down. There are no odd sounds or beeps, whichever of the scenarios goes down. I thought it might be the SSD drive that is dying, but it does not use SMART and it appears difficult to troubleshoot. I tried booting with and without the battery, but the scenarios are identical. Before completely investigating the hard drive, I'd like to hear opinions regarding the cause of this problem. Is this most likely the hard drive, or could there be another cause for these symptoms? Using Arch Linux.

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• Can't delete profile

  - by generic_noob

  Hi All, I have a client machine (XP SP3) which used to be connected to a windows 2003 domain, but the server has since gone down due to a hard drive failure, however the profiles still remain in 'documents and settings'. I have a local admin account on the same machine (in the administrator's group), except when i try to remove the profiles manually from System Properties - Advanced - User Profiles - Settings, the delete button is disabled. Also, Windows prevents me from deleting or renaming the user's profile folder as well, due to a lock with ntuser.dat Any thoughts on this would be greatly appreciated, Cheers!

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• Windows 8: 100% disk active time, no actual data transferred

  - by fingerbangpalateclick

  Occasionally, like several times an hour, my hard drive will appear to lock up: Task Manager will show 100% active time with read and write speeds of 0. I can still switch between open windows, but anything that requires a disk access will stall for around a minute until the hard disk starts working properly again. It happens at apparently random intervals, and only happens in Windows 8. Not 7, nor Linux. It is probably not a problem with the disk itself: This is a relatively new hard drive, and S.M.A.R.T. is showing no errors. Only happens in Windows 8: not any other OS that has used the same partition, or different partitions. So, what is going on? How can I fix this? Note: this is a different problem then this one: Extremely high disk activity without any real usage My task manager would look similar, but Average Response Time, Read Speed, and Write Speed would all be 0.

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• RDC stops working after a period of time.

  - by xjerx

  I have a workstation with RDC configured for the employee. When they leave at the end of their day they lock the pc (windows key + l). They go home connect to our VPN and log back in. Everything works fine. The following morning they will attempt to log in before they return to the office. The computer does not respond to the RDC request. I've found that it becomes completely inactive to any ICMP requests. Once the user reboots the computer everything works fine again. I'm going to turn off RDC, reboot, turn RDC back on and reboot again to see if it fixes the problem. Until then does anyone have any other ideas?

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• Microsoft Enterprise Library Caching Application Block not thread safe?!

  - by AlanR

  Good aftenoon, I created a super simple console app to test out the Enterprise Library Caching Application Block, and the behavior is blaffling. I'm hoping I screwed something that's easy to fix in the setup. Have each item expire after 5 seconds for testing purposes. Basic setup -- "every second pick a number between 0 and 2. if the cache doesn't already have it, put it in there -- otherwise just grab it from the cache. Do this inside a LOCK statement to ensure thread safety. APP.CONFIG: <configuration> <configSections> <section name="cachingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Caching.Configuration.CacheManagerSettings, Microsoft.Practices.EnterpriseLibrary.Caching, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </configSections> <cachingConfiguration defaultCacheManager="Cache Manager"> <cacheManagers> <add expirationPollFrequencyInSeconds="1" maximumElementsInCacheBeforeScavenging="1000" numberToRemoveWhenScavenging="10" backingStoreName="Null Storage" type="Microsoft.Practices.EnterpriseLibrary.Caching.CacheManager, Microsoft.Practices.EnterpriseLibrary.Caching, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="Cache Manager" /> </cacheManagers> <backingStores> <add encryptionProviderName="" type="Microsoft.Practices.EnterpriseLibrary.Caching.BackingStoreImplementations.NullBackingStore, Microsoft.Practices.EnterpriseLibrary.Caching, Version=4.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" name="Null Storage" /> </backingStores> </cachingConfiguration> </configuration> C#: using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.Practices.EnterpriseLibrary.Common; using Microsoft.Practices.EnterpriseLibrary.Caching; using Microsoft.Practices.EnterpriseLibrary.Caching.Expirations; namespace ConsoleApplication1 { class Program { public static ICacheManager cache = CacheFactory.GetCacheManager("Cache Manager"); static void Main(string[] args) { while (true) { System.Threading.Thread.Sleep(1000); // sleep for one second. var key = new Random().Next(3).ToString(); string value; lock (cache) { if (!cache.Contains(key)) { cache.Add(key, key, CacheItemPriority.Normal, null, new SlidingTime(TimeSpan.FromSeconds(5))); } value = (string)cache.GetData(key); } Console.WriteLine("{0} --> '{1}'", key, value); //if (null == value) throw new Exception(); } } } } OUPUT -- How can I prevent the cache to returning nulls? 2 --> '2' 1 --> '1' 2 --> '2' 0 --> '0' 2 --> '2' 0 --> '0' 1 --> '' 0 --> '0' 1 --> '1' 2 --> '' 0 --> '0' 2 --> '2' 0 --> '0' 1 --> '' 2 --> '2' 1 --> '1' Press any key to continue . . . Thanks in advance, -Alan.

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• SqlBulkCopy is slow, doesn't utilize full network speed

  - by Alex

  Hi, for that past couple of weeks I have been creating generic script that is able to copy databases. The goal is to be able to specify any database on some server and copy it to some other location, and it should only copy the specified content. The exact content to be copied over is specified in a configuration file. This script is going to be used on some 10 different databases and run weekly. And in the end we are copying only about 3%-20% of databases which are as large as 500GB. I have been using the SMO assemblies to achieve this. This is my first time working with SMO and it took a while to create generic way to copy the schema objects, filegroups ...etc. (Actually helped find some bad stored procs). Overall I have a working script which is lacking on performance (and at times times out) and was hoping you guys would be able to help. When executing the WriteToServer command to copy large amount of data ( 6GB) it reaches my timeout period of 1hr. Here is the core code for copying table data. The script is written in PowerShell. $query = ("SELECT * FROM $selectedTable " + $global:selectiveTables.Get_Item($selectedTable)).Trim() Write-LogOutput "Copying $selectedTable : '$query'" $cmd = New-Object Data.SqlClient.SqlCommand -argumentList $query, $source $cmd.CommandTimeout = 120; $bulkData = ([Data.SqlClient.SqlBulkCopy]$destination) $bulkData.DestinationTableName = $selectedTable; $bulkData.BulkCopyTimeout = $global:tableCopyDataTimeout # = 3600 $reader = $cmd.ExecuteReader(); $bulkData.WriteToServer($reader); # Takes forever here on large tables The source and target databases are located on different servers so I kept track of the network speed as well. The network utilization never went over 1% which was quite surprising to me. But when I just transfer some large files between the servers, the network utilization spikes up to 10%. I have tried setting the $bulkData.BatchSize to 5000 but nothing really changed. Increasing the BulkCopyTimeout to an even greater amount would only solve the timeout. I really would like to know why the network is not being used fully. Anyone else had this problem? Any suggestions on networking or bulk copy will be appreciated. And please let me know if you need more information. Thanks. UPDATE I have tweaked several options that increase the performance of SqlBulkCopy, such as setting the transaction logging to simple and providing a table lock to SqlBulkCopy instead of the default row lock. Also some tables are better optimized for certain batch sizes. Overall, the duration of the copy was decreased by some 15%. And what we will do is execute the copy of each database simultaneously on different servers. But I am still having a timeout issue when copying one of the databases. When copying one of the larger databases, there is a table for which I consistently get the following exception: System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. It is thrown about 16 after it starts copying the table which is no where near my BulkCopyTimeout. Even though I get the exception that table is fully copied in the end. Also, if I truncate that table and restart my process for that table only, the tables is copied over without any issues. But going through the process of copying that entire database fails always for that one table. I have tried executing the entire process and reseting the connection before copying that faulty table, but it still errored out. My SqlBulkCopy and Reader are closed after each table. Any suggestions as to what else could be causing the script to fail at the point each time?

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• IE attachEvent on object tag causes memory corruption

  - by larswa

  I've an ActiveX Control within an embedded IE8 HTML page that has the following event MessageReceived([in] BSTR srcWindowId, [in] BSTR json). On Windows the event is registered with OCX.attachEvent("MessageReceived", onMessageReceivedFunc). Following code fires the event in the HTML page. HRESULT Fire_MessageReceived(BSTR id, BSTR json) { CComVariant varResult; T* pT = static_cast<T*>(this); int nConnectionIndex; CComVariant* pvars = new CComVariant[2]; int nConnections = m_vec.GetSize(); for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++) { pT->Lock(); CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex); pT->Unlock(); IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p); if (pDispatch != NULL) { VariantClear(&varResult); pvars[1] = id; pvars[0] = json; DISPPARAMS disp = { pvars, NULL, 2, 0 }; pDispatch->Invoke(0x1, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL); } } delete[] pvars; // -> Memory Corruption here! return varResult.scode; } After I enabled gflags.exe with application verifier, the following strange behaviour occur: After Invoke() that is executing the JavaScript callback, the BSTR from pvars[1] is copied to pvars[0] for some unknown reason!? The delete[] of pvars causes a double free of the same string then which ends in a heap corruption. Does anybody has an idea whats going on here? Is this a IE bug or is there a trick within the OCX Implementation that I'm missing? If I use the tag like: <script for="OCX" event="MessageReceived(id, json)" language="JavaScript" type="text/javascript"> window.onMessageReceivedFunc(windowId, json); </script> ... the strange copy operation does not occur. The following code also seem to be ok due to the fact that the caller of Fire_MessageReceived() is responsible for freeing the BSTRs. HRESULT Fire_MessageReceived(BSTR srcWindowId, BSTR json) { CComVariant varResult; T* pT = static_cast<T*>(this); int nConnectionIndex; VARIANT pvars[2]; int nConnections = m_vec.GetSize(); for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++) { pT->Lock(); CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex); pT->Unlock(); IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p); if (pDispatch != NULL) { VariantClear(&varResult); pvars[1].vt = VT_BSTR; pvars[1].bstrVal = srcWindowId; pvars[0].vt = VT_BSTR; pvars[0].bstrVal = json; DISPPARAMS disp = { pvars, NULL, 2, 0 }; pDispatch->Invoke(0x1, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL); } } delete[] pvars; return varResult.scode; } Thanks!

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• unsigned char* buffer (FreeType2 Bitmap) to System::Drawing::Bitmap.

  - by Dennis Roche

  Hi, I'm trying to convert a FreeType2 bitmap to a System::Drawing::Bitmap in C++/CLI. FT_Bitmap has a unsigned char* buffer that contains the data to write. I have got somewhat working save it disk as a *.tga, but when saving as *.bmp it renders incorrectly. I believe that the size of byte[] is incorrect and that my data is truncated. Any hints/tips/ideas on what is going on here would be greatly appreciated. Links to articles explaining byte layout and pixel formats etc. would be helpful. Thanks!! C++/CLI code. FT_Bitmap *bitmap = &face->glyph->bitmap; int width = (face->bitmap->metrics.width / 64); int height = (face->bitmap->metrics.height / 64); // must be aligned on a 32 bit boundary or 4 bytes int depth = 8; int stride = ((width * depth + 31) & ~31) >> 3; int bytes = (int)(stride * height); // as *.tga void *buffer = bytes ? malloc(bytes) : NULL; if (buffer) { memset(buffer, 0, bytes); for (int i = 0; i < glyph->rows; ++i) memcpy((char *)buffer + (i * width), glyph->buffer + (i * glyph->pitch), glyph->pitch); WriteTGA("Test.tga", buffer, width, height); } // as *.bmp array<Byte>^ values = gcnew array<Byte>(bytes); Marshal::Copy((IntPtr)glyph->buffer, values, 0, bytes); Bitmap^ systemBitmap = gcnew Bitmap(width, height, PixelFormat::Format24bppRgb); // create bitmap data, lock pixels to be written. BitmapData^ bitmapData = systemBitmap->LockBits(Rectangle(0, 0, width, height), ImageLockMode::WriteOnly, bitmap->PixelFormat); Marshal::Copy(values, 0, bitmapData->Scan0, bytes); systemBitmap->UnlockBits(bitmapData); systemBitmap->Save("Test.bmp"); Reference, FT_Bitmap typedef struct FT_Bitmap_ { int rows; int width; int pitch; unsigned char* buffer; short num_grays; char pixel_mode; char palette_mode; void* palette; } FT_Bitmap; Reference, WriteTGA bool WriteTGA(const char *filename, void *pxl, uint16 width, uint16 height) { FILE *fp = NULL; fopen_s(&fp, filename, "wb"); if (fp) { TGAHeader header; memset(&header, 0, sizeof(TGAHeader)); header.imageType = 3; header.width = width; header.height = height; header.depth = 8; header.descriptor = 0x20; fwrite(&header, sizeof(header), 1, fp); fwrite(pxl, sizeof(uint8) * width * height, 1, fp); fclose(fp); return true; } return false; } Update FT_Bitmap *bitmap = &face->glyph->bitmap; // stride must be aligned on a 32 bit boundary or 4 bytes int depth = 8; int stride = ((width * depth + 31) & ~31) >> 3; int bytes = (int)(stride * height); target = gcnew Bitmap(width, height, PixelFormat::Format8bppIndexed); // create bitmap data, lock pixels to be written. BitmapData^ bitmapData = target->LockBits(Rectangle(0, 0, width, height), ImageLockMode::WriteOnly, target->PixelFormat); array<Byte>^ values = gcnew array<Byte>(bytes); Marshal::Copy((IntPtr)bitmap->buffer, values, 0, bytes); Marshal::Copy(values, 0, bitmapData->Scan0, bytes); target->UnlockBits(bitmapData);

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• Twitter Bootstrap modal spans, side-by-side divs and "control-group"?

  - by Federico Stango

  I'm trying my best to have a good looking modal login form but for some reasons it seems that no matter how I nest divs, I cannot obtain the proper shape. What I need is a big "lock" image side-by-side with a username/password form. The best I could do adds a horizontal scroller by the modal bottom and shows the input gadgets fairly distant from the image partly hidden on the right side of the modal canvas. Inspecting with FireBug it seems that the spans in row-fluid are ok but the "control-label" and "controls" class adds way too much space on the left by width (for the labels) and margin-left (for the controls). How would you solve it? Am I doing something wrong with divs and classes nesting? This is the current modal without the main wrapper as it gets added by some js code that loads modal contents through ajax: <form class="form-horizontal" id="login" name="login" method="post" action="<?php echo site_url('user/login'); ?>"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button> <h3>Login</h3> </div> <div class="modal-body"> <?php if ( isset($error) ) { ?> <div class="row"> <div class="alert alert-error"> <strong>Warning!</strong> <?php echo $error; ?> </div> </div> <?php } ?> <div class="row-fluid"> <div class="span4"> <img src="skins/frontend/base/images/lock.png" width="96px" height="96px" /> </div> <div class="span8"> <div class="control-group"> <label class="control-label" for="email">Email</label> <div class="controls"><input type="text" placeholder="Type your email" id="email" name="email" /></div> <?php echo form_error('email', '<div id="error_email" class="alert alert-error">* ', '</div>'); ?> </div> <div class="control-group"> <label class="control-label" for="password">Password</label> <div class="controls"><input type="password" placeholder="Password" id="password" name="password" /></div> <?php echo form_error('password', '<div id="error_password" class="alert alert-error">* ', '</div>'); ?> </div> <div class="control-group"> <div class="controls"><label class="checkbox inline"><input type="checkbox" id="remember" name="remember" checked="checked" />&nbsp;Remember Me</label></div> </div> </div> </div> </div> <div class="modal-footer"> <button type="submit" class="btn btn-primary">Login</button> </div> </form> Just don't take into account the php code you see... :) Thanks in advance for all the support you can give! Federico

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• ASP.NET- using System.IO.File.Delete() to delete file(s) from directory inside wwwroot?

  - by Jim S

  Hello, I have a ASP.NET SOAP web service whose web method creates a PDF file, writes it to the "Download" directory of the applicaton, and returns the URL to the user. Code: //Create the map images (MapPrinter) and insert them on the PDF (PagePrinter). MemoryStream mstream = null; FileStream fs = null; try { //Create the memorystream storing the pdf created. mstream = pgPrinter.GenerateMapImage(); //Convert the memorystream to an array of bytes. byte[] byteArray = mstream.ToArray(); //return byteArray; //Save PDF file to site's Download folder with a unique name. System.Text.StringBuilder sb = new System.Text.StringBuilder(Global.PhysicalDownloadPath); sb.Append("\\"); string fileName = Guid.NewGuid().ToString() + ".pdf"; sb.Append(fileName); string filePath = sb.ToString(); fs = new FileStream(filePath, FileMode.CreateNew); fs.Write(byteArray, 0, byteArray.Length); string requestURI = this.Context.Request.Url.AbsoluteUri; string virtPath = requestURI.Remove(requestURI.IndexOf("Service.asmx")) + "Download/" + fileName; return virtPath; } catch (Exception ex) { throw new Exception("An error has occurred creating the map pdf.", ex); } finally { if (mstream != null) mstream.Close(); if (fs != null) fs.Close(); //Clean up resources if (pgPrinter != null) pgPrinter.Dispose(); } Then in the Global.asax file of the web service, I set up a Timer in the Application_Start event listener. In the Timer's ElapsedEvent listener I look for any files in the Download directory that are older than the Timer interval (for testing = 1 min., for deployment ~20 min.) and delete them. Code: //Interval to check for old files (milliseconds), also set to delete files older than now minus this interval. private static double deleteTimeInterval; private static System.Timers.Timer timer; //Physical path to Download folder. Everything in this folder will be checked for deletion. public static string PhysicalDownloadPath; void Application_Start(object sender, EventArgs e) { // Code that runs on application startup deleteTimeInterval = Convert.ToDouble(System.Configuration.ConfigurationManager.AppSettings["FileDeleteInterval"]); //Create timer with interval (milliseconds) whose elapse event will trigger the delete of old files //in the Download directory. timer = new System.Timers.Timer(deleteTimeInterval); timer.Enabled = true; timer.AutoReset = true; timer.Elapsed += new System.Timers.ElapsedEventHandler(OnTimedEvent); PhysicalDownloadPath = System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath + "Download"; } private static void OnTimedEvent(object source, System.Timers.ElapsedEventArgs e) { //Delete the files older than the time interval in the Download folder. var folder = new System.IO.DirectoryInfo(PhysicalDownloadPath); System.IO.FileInfo[] files = folder.GetFiles(); foreach (var file in files) { if (file.CreationTime < DateTime.Now.AddMilliseconds(-deleteTimeInterval)) { string path = PhysicalDownloadPath + "\\" + file.Name; System.IO.File.Delete(path); } } } This works perfectly, with one exception. When I publish the web service application to inetpub\wwwroot (Windows 7, IIS7) it does not delete the old files in the Download directory. The app works perfect when I publish to IIS from a physical directory not in wwwroot. Obviously, it seems IIS places some sort of lock on files in the web root. I have tested impersonating an admin user to run the app and it still does not work. Any tips on how to circumvent the lock programmatically when in wwwroot? The client will probably want the app published to the root directory. Thank you very much.

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• How can I get SQL Server transactions to use record-level locks?

  - by Joe White

  We have an application that was originally written as a desktop app, lo these many years ago. It starts a transaction whenever you open an edit screen, and commits if you click OK, or rolls back if you click Cancel. This worked okay for a desktop app, but now we're trying to move to ADO.NET and SQL Server, and the long-running transactions are problematic. I found that we'll have a problem when multiple users are all trying to edit (different subsets of) the same table at the same time. In our old database, each user's transaction would acquire record-level locks to every record they modified during their transaction; since different users were editing different records, everyone gets their own locks and everything works. But in SQL Server, as soon as one user edits a record inside a transaction, SQL Server appears to get a lock on the entire table. When a second user tries to edit a different record in the same table, the second user's app simply locks up, because the SqlConnection blocks until the first user either commits or rolls back. I'm aware that long-running transactions are bad, and I know that the best solution would be to change these screens so that they no longer keep transactions open for a long time. But since that would mean some invasive and risky changes, I also want to research whether there's a way to get this code up and running as-is, just so I know what my options are. How can I get two different users' transactions in SQL Server to lock individual records instead of the entire table? Here's a quick-and-dirty console app that illustrates the issue. I've created a database called "test1", with one table called "Values" that just has ID (int) and Value (nvarchar) columns. If you run the app, it asks for an ID to modify, starts a transaction, modifies that record, and then leaves the transaction open until you press ENTER. I want to be able to start the program and tell it to update ID 1; let it get its transaction and modify the record; start a second copy of the program and tell it to update ID 2; have it able to update (and commit) while the first app's transaction is still open. Currently it freezes at step 4, until I go back to the first copy of the app and close it or press ENTER so it commits. The call to command.ExecuteNonQuery blocks until the first connection is closed. public static void Main() { Console.Write("ID to update: "); var id = int.Parse(Console.ReadLine()); Console.WriteLine("Starting transaction"); using (var scope = new TransactionScope()) using (var connection = new SqlConnection(@"Data Source=localhost\sqlexpress;Initial Catalog=test1;Integrated Security=True")) { connection.Open(); var command = connection.CreateCommand(); command.CommandText = "UPDATE [Values] SET Value = 'Value' WHERE ID = " + id; Console.WriteLine("Updating record"); command.ExecuteNonQuery(); Console.Write("Press ENTER to end transaction: "); Console.ReadLine(); scope.Complete(); } } Here are some things I've already tried, with no change in behavior: Changing the transaction isolation level to "read uncommitted" Specifying a "WITH (ROWLOCK)" on the UPDATE statement

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• Self-updating collection concurrency issues

  - by DEHAAS

  I am trying to build a self-updating collection. Each item in the collection has a position (x,y). When the position is changed, an event is fired, and the collection will relocate the item. Internally the collection is using a “jagged dictionary”. The outer dictionary uses the x-coordinate a key, while the nested dictionary uses the y-coordinate a key. The nested dictionary then has a list of items as value. The collection also maintains a dictionary to store the items position as stored in the nested dictionaries – item to stored location lookup. I am having some trouble making the collection thread safe, which I really need. Source code for the collection: public class PositionCollection<TItem, TCoordinate> : ICollection<TItem> where TItem : IPositionable<TCoordinate> where TCoordinate : struct, IConvertible { private readonly object itemsLock = new object(); private readonly Dictionary<TCoordinate, Dictionary<TCoordinate, List<TItem>>> items; private readonly Dictionary<TItem, Vector<TCoordinate>> storedPositionLookup; public PositionCollection() { this.items = new Dictionary<TCoordinate, Dictionary<TCoordinate, List<TItem>>>(); this.storedPositionLookup = new Dictionary<TItem, Vector<TCoordinate>>(); } public void Add(TItem item) { if (item.Position == null) { throw new ArgumentException("Item must have a valid position."); } lock (this.itemsLock) { if (!this.items.ContainsKey(item.Position.X)) { this.items.Add(item.Position.X, new Dictionary<TCoordinate, List<TItem>>()); } Dictionary<TCoordinate, List<TItem>> xRow = this.items[item.Position.X]; if (!xRow.ContainsKey(item.Position.Y)) { xRow.Add(item.Position.Y, new List<TItem>()); } xRow[item.Position.Y].Add(item); if (this.storedPositionLookup.ContainsKey(item)) { this.storedPositionLookup[item] = new Vector<TCoordinate>(item.Position); } else { this.storedPositionLookup.Add(item, new Vector<TCoordinate>(item.Position)); // Store a copy of the original position } item.Position.PropertyChanged += (object sender, PropertyChangedEventArgs eventArgs) => this.UpdatePosition(item, eventArgs.PropertyName); } } private void UpdatePosition(TItem item, string propertyName) { lock (this.itemsLock) { Vector<TCoordinate> storedPosition = this.storedPositionLookup[item]; this.RemoveAt(storedPosition, item); this.storedPositionLookup.Remove(item); } } } I have written a simple unit test to check for concurrency issues: [TestMethod] public void TestThreadedPositionChange() { PositionCollection<Crate, int> collection = new PositionCollection<Crate, int>(); Crate crate = new Crate(new Vector<int>(5, 5)); collection.Add(crate); Parallel.For(0, 100, new Action<int>((i) => crate.Position.X += 1)); Crate same = collection[105, 5].First(); Assert.AreEqual(crate, same); } The actual stored position varies every time I run the test. I appreciate any feedback you may have.

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• mysql_close doesn't kill locked sql requests

  - by Nikita

  I use mysqld Ver 5.1.37-2-log for debian-linux-gnu I perform mysql calls from c++ code with functions mysql_query. The problem occurs when mysql_query execute procedure, procedure locked on locked table, so mysql_query hangs. If send kill signal to application then we can see lock until table is locked. Create the following SQL table and procedure CREATE TABLE IF NOT EXISTS `tabletolock` ( `id` INT NOT NULL AUTO_INCREMENT, PRIMARY KEY (`id`) )ENGINE = InnoDB; DELIMITER $$ DROP PROCEDURE IF EXISTS `LOCK_PROCEDURE` $$ CREATE PROCEDURE `LOCK_PROCEDURE`() BEGIN SELECT id INTO @id FROM tabletolock; END $$ DELOMITER; There are sql commands to reproduce the problem: 1. in one terminal execute lock tables tabletolock write; 2. in another terminal execute call LOCK_PROCEDURE(); 3. In first terminal exeute show processlist and see | 2492 | root | localhost | syn_db | Query | 12 | Locked | SELECT id INTO @id FROM tabletolock | Then perfrom Ctrl-C in second terminal to interrupt our procudere and see processlist again. It is not changed, we already see locked select request and can teminate it by unlock tables or kill commands. Problem described is occured with mysql command line client. Also such problem exists when we use functions mysql_query and mysql_close. Example of c code: #include <iostream> #include <mysql/mysql.h> #include <mysql/errmsg.h> #include <signal.h> // g++ -Wall -g -fPIC -lmysqlclient dbtest.cpp using namespace std; MYSQL * connection = NULL; void closeconnection() { if(connection != NULL) { cout << "close connection !\n"; mysql_close(connection); mysql_thread_end(); delete connection; mysql_library_end(); } } void sigkill(int s) { closeconnection(); signal(SIGINT, NULL); raise(s); } int main(int argc, char ** argv) { signal(SIGINT, sigkill); connection = new MYSQL; mysql_init(connection); mysql_options(connection, MYSQL_READ_DEFAULT_GROUP, "nnfc"); if (!mysql_real_connect(connection, "127.0.0.1", "user", "password", "db", 3306, NULL, CLIENT_MULTI_RESULTS)) { delete connection; cout << "cannot connect\n"; return -1; } cout << "before procedure call\n"; mysql_query(connection, "CALL LOCK_PROCEDURE();"); cout << "after procedure call\n"; closeconnection(); return 0; } Compile it, and perform the folloing actions: 1. in first terminal local tables tabletolock write; 2. run program ./a.out 3. interrupt program Ctrl-C. on the screen we see that closeconnection function is called, so connection is closed. 4. in first terminal execute show processlist and see that procedure was not intrrupted. My question is how to terminate such locked calls from c code? Thank you in advance!

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