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• Unable to set initcwnd on a Hetzner server

  - by Sergi

  We just ordered a bunch of Hetzner EX40SSD servers with the minimal Debian install image that they provide and everything is just fine except that looking at tcpdumps for fine tuning the network from various locations the initcwnd param seems to be stuck at 6 no matter how we change it. By default Debian 3.2 kernels should have that setting to 10 so it's pretty strange. Is it possible that the NIC driver or a custom setting in the Hetzner Debian image is limiting this param? Even if we set it to 4, like the old kernel default, it doesn't work. Any ideas would be much appreciated! Does anyone know if the NIC drivers provided by default by Debian have some kind on limitation. In a long thread in http://www.webhostingtalk.com/showthread.php?t=1200617&highlight=hetzner they talk about a page http://wiki.hetzner.de/index.php/Installation_des_r8168-Treibers/en where Hetzner states that the included Realtek r8168 driver is not working properly, but nowhere do they say that the initcwnd could be affected. Tomorrow i will try to install a CentOs image and see if Debian is the problem...Last resort would be to install a custom debian image, but that is a pain in the ass! Thanks!

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• What does Firefox do when "scanning for viruses" after download?

  - by Joey

  Never mind the fact that Firefox is a browser and not a AV tool, but what exactly does it do after a download? Even on systems that have an up-to-date AV this generates a pause of several seconds after download (where I can't open the file from within the DL manager) and I have no idea what FF might be trying there. I know I can turn it off (using FF only at work anyway) but I'm wondering. I can think of some things here what it might be: FF itself is a AV scanner and it loads signatures in the background and whatnot. Sounds highly unlikely and shouldn't need tens of seconds for 20 KiB files. FF tries to talk with the installed AV to munch the file. Sounds unneeded, given that most AV programs feature real-time protection anyway and therefore will have caught a virus already and also because FF does that on systems without AV installed too. FF uploads the file to some online virus checker. Unlikely and stupid. FF instructs some online virus checker to download the file and check it. Unlikely and would be a nice target for DoSing that service. FF generates a hash of the file and sends that somewhere (presumably Google) to check for. They then respond with either "Whoa, that hash is totally a virus" or "Nope, that MD5 doesn't look very virus-y to me". I'm running out of better ideas. Anyone have a clue?

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• Getting old bluetooth headset out of standby on Windows 7

  - by luagh45

  I think this is the problem, and if not, I'm open to suggestions. I have an old Jabra BT200 that I used to use on my phone. When a phone call was coming in it would beep using its own noises (meaning the phone never rang inside the headset) and then I could push the 'answer/hang up' button and sound and mic would start working. I have now paired it with Windows 7, and it looks good. Under the playback menu I have 'Bluetooth Hands free Audio / Jabra BT200 (Mono Audio) / Ready', and under the recording menu I have 'Bluetooth Audio Input Device / Jabra BT200 (Mono Audio) / Ready'. However when I try to test the speakers Windows sends a sound, but I never hear it, and when I talk in the mic, Windows never hears me. If I right click either the Bluetooth mic or speakers there's an option to 'Connect', but it's grayed out and I cannot click it. As the final piece of knowledge I have, my headset blinks once every 3 seconds when it's in standby and I can't get that to change. If everything was working it should blink once every second at which point I think all of my problems would be fixed. Hence my issue: I can't seem to get my headset out of standby. On my headset I've tried sending it test noises and then pressing the 'Answer' button, but still nothing. The headset beeps when I press it, so it works, it just doesn't ever come out of standby. Is there maybe some way to trick my headset into thinking it's getting a phone call from my computer?

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• Bypass network stack. Which options do we have? Pros and cons of each option [on hold]

  - by javapowered

  I'm writing trading application. I want to bypass network stack in Linux but I don't know how this can be done. I'm looking for complete list of options with pros and cons of each of them. The only option I know - is to buy solarflare network card which supports OpenOnLoad. What other options should I consider and what is pros and cons of each of them? Well the question is pretty simple - what is the best way to bypass network stack? upd: OpenOnload It achieves performance improvements in part by performing network processing at user-level, bypassing the OS kernel entirely on the data path. Intel DDIO to allow Intel® Ethernet Controllers and adapters to talk directly with the processor cache of the Intel® Xeon® processor E5. What's key difference between these techologies? Do they do roughly the same things? I much better like Intel DDIO because it's much easy to use, but OpenOnload required a lot of installation and tuning. If good OpenOnload application is much faster than good Intel DDIO application?

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• Setup ejabberd with SQL Server 2008

  - by wonster

  Here's what I have got so far. Windows 2008 Server 64 bit. Installed the latest version of ejabberd, ejabberd-2.1.8-windows-installer.exe. The windows service starts up fine but seems ineffective. However, using the start & stop scripts work. I am able to login to the admin page which so far doesn't seem that versatile. Opened up ports 5222, 5226 and 5280 for my workstation to talk to the server. I've got Spark and Jabbear Windows clients to register, login and instant message with multiple accounts using the server. After confirming that I've got the very basics working, I've decided to make use of SQL Server 2008 as the database. Reason? Mainly, I am very comfortable with SQL Server. I can deal with redundancy, failover, data analysis easily. Not sure if ejabberd's built in DB provides all that. Following the instructions from ejabberd's documentation, I setup a system DSN that points to another physical database. The DSN checks out fine. (Tried both Named Pipes and TCP/IP) Modified ejabberd.cfg. Commented line %%{auth_method, internal} and uncommented line {auth_method, odbc} Uncommented and modified {odbc_server, "DSN=ejabberd;UID=somelogin;PWD=somepassword"}. After making these changes, I restarted. No errors are found in the log files. The jabber clients are no longer able to register new accounts. I'm not sure where to look for errors besides the /logs/ folder as I'm new to all this. I am basically stuck here on step 5. Has anyone got this setup to work recently? Some of the posts I've found around are years old and of no help. I can't be the only one setting up ejabberd with MS SQL. Any help would be appreciated!

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• Windows 8 preinstall downgrade to Win 7: UEFI problems :/

  - by Tim Flemming

  I have a friend who has a Hp Laptop with UEFI booting. He locked himself out of windows 8 (forgot his password)... so he called me. Well after trying to use the latest version of chntpw in UBCD5.2.6, i came to the conclusion i needed to wipe the drive and install windows 7. A little googling suggested using certain versions of chntpw, but i decided to not waste the time burning endless CDs. Anyway, He agreed to installing Win7 "I hate the big tile thingys". So i attacked with Gparted. Wiped the whole drive. Set flags to boot. Set part table as MBR. However upon trying to install win7, it still claimed i had a GPT style disk. unable to install. the only thing i can think of I'm doing wrong is not changing the bios/UEFI to legacy... My question is, If I enable legacy, somehow get the drive to actually be MBR, and use my X86 DVD, should I be good? Is there some common glitches ppl miss when dealing with GPT/EFI/UEFI? I need answers cuz he now has a blank laptop which I am responsible for. Another question. windows 8 came installed on a GPT disk. SO WHY WHEN I BOOT THE INSTALL DVD DOES IT SAY IT CANT INSTALL TO A GPT STYLE DISK??? WTF??? talk about the bleeding edge man.

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• pfSense routing between two routers with shared network

  - by JohnCC

  I have a network set-up using two pfSense routers arranged like this:- DMZ1 WAN1 WAN2 DMZ2 | | | | | | | | \___ PF1 PF2___/ | | | | \___TRUSTED___/ Each pfSense router has its own separate WAN connection, and a separate DMZ network attached to it. They share a common TRUSTED LAN between them. The machines on the trusted network have PF1 as their default gateway. PF1 has a static route defined to DMZ2 via PF2, and PF2 has a static route to DMZ1 via PF1. There is NAT to the WAN but internal networks (DMZ1/2 and TRUSTED) use different RFC1918 subnets. I inherited this arrangement, and all used to work fine. I made a config change to PF1 (relating to multicast), and machines on DMZ2 suddenly could not talk to TRUSTED. I rolled the change back, but the problem persisted. What I guess you'd hope would happen is that TCP packets would go DMZ2 - PF2 - TRUSTED and on return TRUSTED - PF1 - PF2 - DMZ2. That's the only way I can see it would have worked. However, PF1 drops the returning packets. I've verified this using tcpdump. I've worked around this by adding static routes to DMZ2 via PF2 to the servers on TRUSTED, but some devices on there do not support static routes so this is not ideal. Is there way to make this arrangement work decently, or is the design inherently flawed? Thanks!

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• Windows Server 2008 IIS Random disconnect

  - by d123

  I am having a bit of a quirk with my IIS server. I'm running my IIS with 2 sets of IPs configured, one in the 192 range and the other in 172 range. I then have multiple apps which will talk to this server for information. Server has no AV or firewalls configured. I noticed that my apps when talking to the server on the 172 range, at random intervals, the server would just not respond. My apps would then disconnect and just try again, and every thing would be fine. This doesn't happen on the 192 range. So what I did is on a Linux box I did a watch command and to wget a file every half second on the 172 and 192 IPs. I noticed the same issue, every once in awhile wget on the 172 range would not get through, but there is no issues at all on 192. Thus I went around to Wireshark and did a dump. This is the last 3 packets, no other packets were received. 7010 100.871877 200.100.30.7 172.0.0.1 TCP 59619 http [ACK] Seq=140 Ack=85242 Win=64128 Len=0 TSV=1072818795 TSER=1660246133 7011 100.872238 200.100.30.7 172.0.0.1 TCP 59619 http [FIN, ACK] Seq=140 Ack=85242 Win=64128 Len=0 TSV=1072818796 TSER=1660246133 7013 100.873081 200.100.30.7 172.0.0.1 TCP 59619 http [ACK] Seq=141 Ack=85243 Win=64128 Len=0 TSV=1072818796 TSER=1660246133 So this is my issue, there is a random disconnect every once in awhile. The server doesn't receive the next SYN packet. HELP?

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• How can I make AdobePS recognize my printer in Win98se?

  - by Jeff

  I am trying to use the adobe product: "PostScript Printer Driver AdobePS 4.2.6 for Windows 95 and Windows 98" to connect a new HP laser printer (CP1025nw) via USB to a machine running win98SE. I am using the PPD file for "HP color LaserJet PS". The Adobe utility installs the printer, and it shows up on the printer list ... but it doesn't print. I get an error message (sometimes) that an error occurred writing to USB001.. Evidently, AdobePS cannot "See" the printer. I suspect there is a problem wrt the printer port. Nothing I pick works. I have two virtual printer ports, USB001 and USB002 which were created during the installation of an HP inkjet printer. The inkjet will work on either of these, but the laser printer works on neither. When I connect the laserjet printer, the windows New Hardware Wizard activates, but I don't see how to point it at the AdobePS Postscript driver. HP has no support whatsoever for win98, so there's no hope of getting help from them. The printer works great with the several winXP computers connected through either the network connection or the USB. So, how do I convince Win98se to use the adobe postscript printer driver? Is this printer even a postscript printer? Is there a better way to get win98se to talk to this printer? Any suggestions?

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• Gentoo server time issue, can't manually set time, NTPD won't correct, too big of a time difference

  - by kevingreen

  So, my server is living in the future, unfortunately I can't get lottery numbers, or stock picks out of it. It thinks this is the time: Thu Nov 7 04:07:18 EST 2013 Not correct, I tried to set the time manually via date in a few ways # date -s "06 NOV 2013 14:48:00" # date 110614482013 -- same output, same problem Which outputs Wed Nov 6 14:48:00 EST 2013, but when I check the date again, it's still set to Nov 7th 0400 or whatever. I checked my system messages, and I see this pop up often: Nov 7 03:54:00 www ntpd[4482]: time correction of -47927 seconds exceeds sanity limit (1000); set clock manually to the correct UTC time. Which makes sense, we're way off the correct time. But I can't seem to manually fix it. So now what? Also, I'm wondering if my hardware clock is setup correct, hwclock doesn't return any values. Would that be causing issues? This is a virtualized server, I don't have direct access to the hypervisor, but I can talk to who does, assume I can explain myself well enough. Thanks

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• Dual Monitor + Virtual Desktop software (plus for cube)

  - by xenithorb

  I've recently purchased another monitor, my first one being a TV and being much larger. I now sit at a desk and use my shiny new 24" LED more often, but I like to extend the desktop into the TV. The problem presented with this is to save power and the longevity of my 47" VIZIO, I try to keep it off when possible. What I'm seeking sounds very simple - If any of you have ever used Compiz or Deskspace (Yod'm) - You'll know what im referring to when I talk about a "cube." The most important functionality I'm looking for is the ability to scroll desktop contents between both displays and virtual desktops. Deskspace does and excellent job of presenting an attractive cube, but it creates a separate cube and virtual desktop space for the second extended monitor (now the TV) - Again, what I'm looking to do is scroll between virtual desktops, by passing through both monitors. The net effect of this functionality would allow me to scroll the contents of the extended monitor to the first monitor should a window get caught there without having to turn on the TV. So imagine the horizontal portion of a cube as being actual real monitors - is there anything that allows one to rotate desktops between displays?

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• Asterisk relay between multiple subnets

  - by immoune

  I wonder what's the best way to go when you have phones on multiple networks which are not directly reachable. I have 3 networks 10.3.x.x 10.6.x.x 10.17.x.x My asterisk server resides on the 10.3.0.5 IP. The machines from the 10.6 and 10.17 networks are routed here through VPN tunnels. At this point we don't talk about NAT anywhere on the network just pure routing. Since the 10.3.0.5 PBX has routes back to all the subnet's it has no problem to communicate with softphones/hardphones from these ranges. The problem comes from that Asterisk (as far as I understand) only responsible for the SIP communication part not the Audio/Video transmission which is in P2P fashion done between the devices. So although a client using sipdroid from 10.6.x.x is able to connect to the pbx (10.3.0.5) and dial a bria client on the 10.17.x.x network once the phone rings out and the call establishes no audio will be transmitted simply because it has no way to directly connect there. For this there are multiple solutions described in this text: http://msdn.microsoft.com/en-us/library/ee480411%28v=winembedded.60%29.aspx What I would prefer is to keep these networks segregated as they are now. What would be the best solution? Is it possible to actually relay through all the audio/video information through the Asterisk server? That would be the best in my case, I using Astlinux there which has a lot of other parts. Thanks

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• How to keep multiple servers in sync file wise?

  - by GForceSys

  I'm currently managing a cluster of PHP-FPM servers, all of which tend to get out of sync with each other. The application that I'm using on top of the app servers (Magento) allows for admins to modify various files on the system, but now that the site is in a clustered set up modifying a file only modifies it on a single instance (on one of the app servers) of the various machines in the cluster. Is there an open-source application for Linux that may allow me to keep all of these servers in sync? I have no problem with creating a small VM instance that can listen for changes from machines to sync. In theory, the perfect application would have small clients that run on each machine to be synced, which would talk to the master server which would then decide how/what to sync from each machine. I have already examined the possibilities of running a centralized file server, but unfortunately my app servers are spread out between EC2 and physical machines, which makes this unfeasible. As there are multiple app servers (some of which are dynamically created depending on the load of the site), simply setting up a rsync cron job is not efficient as the cron job would have to be modified on each machine to send files to every other machine in the cluster, and that would just be a whole bunch of unnecessary data transfers/ssh connections.

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• Compiz & Linux compositing: how does it fit into the X architecture?

  - by Latanius

  Not a really "how to solve stuff" question, but... I was wondering how the modern X architecture works, with compiz & all. What I know about it: in the beginning, there was the X server, clients connected (presumably on TCP), and then sent messages to the server to instruct it to show windows etc. because this didn't work (at all? or just fast enough?) for OpenGL & 3D acceleration, additional APIs were created for direct rendering (DRI? and, in addition to the X server, what things did the X clients talk to to render stuff and through what interfaces?) and, finally, enter Compiz: X clients end up (somehow) rendering to OpenGL textures, which is then put together to form a fancy-looking screen with translucent windows, and rendered to the screen. What I'm especially interested in is what components does the system have and how do they connect to each other? Like... if there is a box labelled "compiz" in the system... is it inside the X server? If it's not, how do the rendered images from the apps end up in it? And where does it render to? Is that another X server? Or DRI? Of course, I'd be equally happy if pointed to some docs capable of clearing up the confusion described above (conditional on they being significantly shorter than book-sized entities).

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• vi and emacs: comparison? (not flamebait!)

  - by jared

  So, I've been enjoying learning and using vi for the last couple of years. The beauty of vi, for me, is that its UI is a language of movement and action with a very uniform, simple grammar, and which is terse enough that the requisite memorization pays ample dividends in how much more I enjoy working with text (by avoiding boring repetition and eliminating micro-hassles, like that half-second annoying wait while you scroll down the screen). (Note--I don't claim to have expert knowledge of vi, but I get around decently well: comfortable with limited '@' macros and regexp search-and-replace within files; frequently use multiple buffers, tabs, and windows; get around pretty well in the file browser; understand the grammar of actions + movement + subject (as described so aptly in this beautiful SO answer); and had some pretty sweet debugger and ctags integration going with PHP.) I wonder if some emacs folks could take a swing at explaining what emacs does brilliantly, or sum its strengths up in a phrase or two. Spare me the talk about productivity; I'm more interested in conceptual clarity. Lisp-centric answers are okay; I'm learning Scheme on the weekends, and would pick up emacs for that alone (have been using Racket).

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• How to chain GRUB2 for Ubuntu 10.04 from Truecrypt & its bootloader (multi boot alongside Windows XP partition)?

  - by Rob

  I want Truecrypt to ask for password for Windows XP as usual but with the standard [ESC] option, on selecting that, i.e via Escape key, I want it to find the grub for the (unencrypted) Ubuntu install. I've installed Windows XP on the 120Gb hard drive of a Toshiba NB100 netbook then partitioned to make room for Ubuntu 10.04 and installed that after the Windows XP install. When I encrypt Windows XP, Truecrypt will overwrite the grub entry in the master boot record (MBR), I believe (?) and I won't be able to choose between XP and Ubuntu anymore. So I need to restore it back. I've searched fairly extensively for answers on Ubuntu forums and elsewhere but have not yet found a complete answer that covers all eventualities, scenarios and error messages, or otherwise they talk of legacy GRUB and not GRUB2. Ubuntu 10.04 uses GRUB2. My setup: Partitions: Windows XP, NTFS (to be encrypted with Truecrypt), 40Gb /boot (Ext4, 1Gb) Ubuntu swap, 4Gb Ubuntu / (root) - main filesystem (20gb) NTFS share, 55Gb I know that the Truecrypt boot loader replaces the GRUB when boot up because I've already tried it on another laptop. I want boot loader screen to look something like the usual: Truecrypt Enter password: (or [ESC] to skip) password is for WindowsXP and on pressing [ESC] for it to find the Ubuntu grub to boot from Thanks in advance for your help. The key area of the problem is how to instruct Truecrypt when escape key is pressed, and how the Grub/Ubuntu can be made visible to the truecrypt bootloader to find it, when the esc key is pressed. Also knowing as chaining.

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• Connecting WD World Book to my new laptop using downloaded win 7 driver

  - by Jeanie

  HELP!!! I have just been reading through and seeing that you can connect using a USB straight to your laptop. This would be great is I actually had the cable! My problem is I have a lovely new laptop with windows 7 - I had to buy this as my old laptop isnt working anymore and I have just ordered an external sata enclosure to see whether I can get any inormation of the old drive and put onto my new laptop, so at least I don't lose any work. This in itself will probably present problems as my old OS was Windows XP! I will deal with that when i get to it!! My problem at present is that I have a World Book and I wish to connect and configure it to my new laptop but again I need to download drivers for Windows 7, which I believe I have done, but now I can't seem to work out just what to do next to help these 2 devices to recognize each other and configure. If anyone has any answers or could talk me through it I would be really grateful. Thanks - Jeanie

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• Network using only switches

  - by mschultz

  So I'm not a network guy - but here's what I want to do - I have an existing network using wifi, which I like, and which is used to connect several computers to the internet. It is headed up by a router, which is in another part of the building. Three of those computers are in my office. All three have gigabit wired ethernet. I have a gigabit switch. Here's what I want to do: Build a 2nd network, out of just that switch, which allows all 3 computers to connect to each other (just to each other is fine, for this purpose, they need no internet). I have a distributed computing task (rendering high-quality fractal artwork, as it were), that requires the best connection speed to all 3 computers. I want them to be able to "talk to each other" as quickly as possible, with the fewest dropped packets (the dataflow over this network will be quite high). So how do I do this. I'm not a networking guy at all - I tried connecting them all, and nobody got an IP address (which I assume is because nobody is running a DNS server?). What all do I need to do to make this work? PS - two are running windows, one is running ubuntu.

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• Byte array serialization in JSON.NET

  - by Daniel Earwicker

  Given this simple class: class HasBytes { public byte[] Bytes { get; set; } } I can round-trip it through JSON using JSON.NET such that the byte array is base-64 encoded: var bytes = new HasBytes { Bytes = new byte[] { 1, 2, 3, 4 } }; // turn it into a JSON string var json = JsonConvert.SerializeObject(bytes); // get back a new instance of HasBytes var result1 = JsonConvert.DeserializeObject<HasBytes>(json); // all is well Debug.Assert(bytes.Bytes.SequenceEqual(result1.Bytes)); But if I deserialize this-a-wise: var result2 = (HasBytes)new JsonSerializer().Deserialize( new JTokenReader( JToken.ReadFrom(new JsonTextReader( new StringReader(json)))), typeof(HasBytes)); ... it throws an exception, "Expected bytes but got string". What other options/flags/whatever would need to be added to the "complicated" version to make it properly decode the base-64 string to initialize the byte array? Obviously I'd prefer to use the simple version but I'm trying to work with a CouchDB wrapper library called Divan, which sadly uses the complicated version, with the responsibilities for tokenizing/deserializing widely separated, and I want to make the simplest possible patch to how it currently works.

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• Why do I get a DependencyProperty.UnsetValue when converting a value in a MultiBinding?

  - by eskerber

  I have an extremely simple IMultiValueConverter that simply OR's two values. In the example below, I want to invert the first value using an equally simple boolean inverter. <MultiBinding Converter="{StaticResource multiBoolToVis}"> <Binding Path="ConditionA" Converter="{StaticResource boolInverter}"/> <Binding Path="ConditionB"/> </MultiBinding> public class BoolInverterConverter : IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (value is bool) { return !((bool)value); } return null; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } #endregion } When I include the boolInverter, the first value in the MultiValueConverter becomes a "DependencyProperty.UnsetValue". There are no problems when I do not use the converter (other than not the logic I am aiming for, of course). Am I missing something? Stepping through the debugger shows that the InverseBoolConverter is properly inverting the value I pass it, but that value is then not being 'sent' to the MultiValueConverter.

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• WCF tcp.net client/server connection failing "Stream Security is required"

  - by Tom W.

  I am trying to test a simple WCF tcp.net client/server app. The WCF service is being hosted on Windows 7 IIS. I have enabled TCP.net in IIS. I granted liberal security privileges to service app by configuring an app pool with admin rights and set the IIS service application to run in the context. I enabled tracing on the service app to troubleshoot. Whenever I run a simple method call against the service from the WCF client app, I get the following exception: "Stream Security is required at http://www.w3.org/2005/08/addressing/anonymous, but no security context was negotiated. This is likely caused by the remote endpoint missing a StreamSecurityBindingElement from its binding." Here is my client configuration: <bindings> <netTcpBinding> <binding name="InsecureTcp"> <security mode="None" /> </binding> </netTcpBinding> </bindings> Here is my service configuration: <bindings> <netTcpBinding> <binding name="InsecureTcp" > <security mode="None" /> </binding> </netTcpBinding> </bindings> <services> <service name="OrderService" behaviorConfiguration="debugServiceBehavior"> <endpoint address="" binding="netTcpBinding" bindingConfiguration="InsecureTcp" contract="ProtoBufWcfService.IOrder" /> </service> </services> <behaviors> <serviceBehaviors> <behavior name="debugServiceBehavior"> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> </serviceBehaviors> </behaviors>

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• motion computation from video using pyglet in python

  - by kuaywai

  Hi, I am writing a simple motion detection program but i want it to be cross platform so im using python and the pyglet library since it provides a simple way to load videos in different formats (specially wmv and mpeg). So far i have the code given below which loads the movie and plays it in a window. Now i need to: 1) grab frame at time t and t-1 2) do a subtraction to see which pixels are active for motion detection. any ideas on how to grab frames and to skip over frames and is it possible to put the pixel values into a matrix in numpy or something directly from pyglet? or should look into using something other than pyglet? thanks kuaywai import pyglet import sys window = pyglet.window.Window(resizable=True) window.set_minimum_size(320,200) window.set_caption('Motion detect 1.0') video_intro = pyglet.resource.media('movie1.wmv') player = pyglet.media.Player() player.queue(video_intro) print 'calculating movie size...' if not player.source or not player.source.video_format: sys.exit myWidth = player.source.video_format.width myHeight = player.source.video_format.height if player.source.video_format.sample_aspect 1: myWidth *= player.source.video_format.sample_aspect elif player.source.video_format.sample_aspect < 1: myHeight /= player.source.video_format.sample_aspect print 'its size is %d,%d' % (myWidth,myHeight) player.play() @window.event def on_draw(): window.clear() (w,h) = window.get_size() player.get_texture().blit(0, h-myHeight, width=myWidth, height=myHeight) pyglet.app.run()

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• WPF: Hide grid row

  - by Richard

  Hi All, I have a simple WPF form with a <Grid> declared on the Form. In this Grid I then have a bunch of Rows: <Grid.RowDefinitions> <RowDefinition Height="Auto" MinHeight="30" /> <RowDefinition Height="Auto" Name="rowToHide"/> <RowDefinition Height="Auto" MinHeight="30" /> </Grid.RowDefinitions> So basically the row with the name "rowToHide" has a few input fields in it, and now I want to hide this row as I don't need these fields. Its simple enough to just set all items in the Row to Visibility = Hidden, but the Row still takes up space in the Grid. So need to do something like setting Height = 0 or something. But that didn't seem to work. You can think of it like this: You have a form, in there we have a drop down saying "Payment Type", and if the person selects "Cash", then hide the row containing the Card details. And it isn't an option to start the form with this hidden already. Thanks everyone!

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• JQuery Json error: Object doesn't support this property or method

  - by Abu Hamzah

  ERROR: Microsoft JScript runtime error: Object doesn't support this property or method i am using WCF service to pull the data and its very simple for the purpose of test and it does returning me the data from wcf service but it fails on json2.js on line number 314-316 // We split the first stage into 4 regexp operations in order to work around // crippling inefficiencies in IE's and Safari's regexp engines. First we // replace all backslash pairs with '@' (a non-JSON character). Second, we // replace all simple value tokens with ']' characters. Third, we delete all // open brackets that follow a colon or comma or that begin the text. Finally, // we look to see that the remaining characters are only whitespace or ']' or // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval. if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@'). replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'). replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) { here is what i am doing function serviceProxy(wjOrderServiceURL) { var _I = this; this.ServiceURL = wjOrderServiceURL; // *** Call a wrapped object this.invoke = function (options) { // Default settings var settings = { serviceMethod: '', data: null, callback: null, error: null, type: "POST", processData: false, contentType: "application/json", dataType: "text", bare: false }; if (options) { $.extend(settings, options); } function GetFederalHolidays() { $("#dContacts1").empty().html('Searching for Active Contacts...'); ContactServiceProxy.invoke({ serviceMethod: "Holidays", callback: function (response) { // ProcessActiveContacts1(response); debugger }, error: function (xhr, errorMsg, thrown) { postErrorAndUnBlockUI(xhr, errorMsg, thrown); } }); } any help what iam doing wrong? i try to change from dataType: text to json but i get the same error above.

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• Silverlight 4 with WCF RIA architecture applying DDD

  - by doteneter

  Hello, In my ASP.NET MVC applications I use DDD and it works very well. I'm new to Silverlight development and would like to know how could I apply DDD to build a new architecture. I had a look on WCF RIA Services and what is exposed by default it's the simple CRUD methods. I would like to use MVVM pattern. I thought about general architecture and don't know if what I'm thinking about make sense in Silverlight development. I thought about creating Domain Model on the top of SVC. I would than expose by WCF RIA some operation that deals with aggreates in my Domain Model instead of simple CRUD. What I would aloso expose is the ViewModel entieties that could be used by the view. I don't know if it's make sense, if I'm going in a good direction or if applying DDD in Silverlight 4 development is a good practice. I didn't find much informations on Internet. I'll appreciate if you could point me to some interesting links or if you can give me some hints. Thanks for your help.

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