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• What is a good solution for an intranet video portal (YouTube-like) site?

  - by Ken Pespisa

  I would like an easy-to-setup site to handle videos to be viewed internally by my company. YouTube is essentially the perfect solution except for its being public. I'm looking for a place where a few people can upload videos, and the system will return a page where they can watch that video in a browser. I figure this would involve a dedicated Web server to run the Web application and process the videos. I've searched and I don't think such a system exists, but I perhaps there's one out there in its infancy that doesn't rank high on Google yet. Essentially the site I'm looking for is what MediaWiki is to Wikis, or what StackExchange is to Q&A sites, but for videos. Thanks in advance!

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• Is there any kind of established architecture for browser based MMO games?

  - by black_puppydog

  I am beginning the development of a broser based game in which players take certain actions at any point in time. Big parts of gameplay will be happening in real life and just have to be entered into the system. I believe a good kind of comparison might be a platform for managing fantasy football, although I have virtually no experience playing that, so please correct me if I am mistaken here. The point is that some events happen in the program (i.e. on the server, out of reach for the players) like pulling new results from some datasource, starting of a new round by a game master and such. Other events happen in real life (two players closing a deal on the transfer of some team member or whatnot - again: have never played fantasy football) and have to be entered into the system. The first part is pretty easy since the game masters will be "staff" and thus can be trusted to a certain degree to not mess with the system. But the second part bothers me quite a lot, especially since the actions may involve multiple steps and interactions with different players, like registering a deal with the system that then has to be approved by the other party or denied and passed on to a game master to decide. I would of course like to separate the game logic as far as possible from the presentation and basic form validation but am unsure how to do this in a clean fashion. Of course I could (and will) put some effort into making my own architectural decisions and prototype different ideas. But I am bound to make some stupid mistakes at some point, so I would like to avoid some of that by getting a little "book smart" beforehand. So the question is: Is there any kind of architectural works that I can read up on? Papers, blogs, maybe design documents or even source code? Writing this down this seems more like a business application with business rules, workflows and such... Any good entry points for that?

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• Encapsulating code in F# (Part 2)

  - by MarkPearl

  In part one of this series I showed an example of encapsulation within a local definition. This is useful to know so that you are aware of the scope of value holders etc. but what I am more interested in is encapsulation with regards to generating useful F# code libraries in .Net, this is done by using Namespaces and Modules. Lets have a look at some C# code first… using System; namespace EncapsulationNS { public class EncapsulationCLS { public static void TestMethod() { Console.WriteLine("Hello"); } } } Pretty simple stuff… now the F# equivalent…. namespace EncapsulationNS module EncapsulationMDL = let TestFunction = System.Console.WriteLine("Hello") ()   Even easier… lets look at some specifics about F# namespaces… Namespaces are open. meaning you can have multiple source files and assemblies can contribute to the same namespace. So, Namespaces are a great way to group modules together, so the question needs to be asked, what role do modules play. For me, the F# module is in many ways similar to the vb6 days of modules. In vb6 modules were separate files and simply allowed us to group certain methods together. I find it easier to visualize F# modules this way than to compare them to the C# classes. However that being said one is not restricted to one module per file – there is flexibility to have multiple modules in one code file however with my limited F# experience I would still recommend using the file as the standard level of separating modules as it is very easy to then find your way around a solution. An important note about interop with F# and other .Net languages. I wrote a blog post a while back about a very basic F# to C# interop. If I were to reference an F# library in a C# project (for instance ‘TestFunction’), in C# it would show this method as a static method call, meaning I would not have to instantiate an instance of the module.

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• Hosting and scaling a Facebook application in the cloud? [migrated]

  - by DhruvPathak

  We would be building a Facebook application in Django (Python), but still not sure of where to host it economically, and with a good provision to scale in case the app gets viral. Some details about the app: Would be HTML based like a website,using django as a framework. 100K is the number of expected pageviews in a day, if the app is viral. The users will not generate any media content, only some database data will be generated by them. It would be great if someone with more experience can guide on following points: A) Hosting on Google app engine or Amazon EC2 or some other cloud like RackSpace : Preferable points found in AppEngine were ease of deployment, cost effectiveness and easy scaling. For EC2: Full hold of the virtual machine,Amazon NoSQL and RDMBS database services in case we decide to use them. B) Does backend technology affect monthly cost? eg. would CPU and memory usage difference of Django over , for example , PHP framework like CodeIgnitor really make remarkable difference in running costs. (Here is the article that triggered this thought process : http://journal.dedasys.com/2010/01/12/rough-estimates-of-the-dollar-cost-of-scaling-web-platforms-part-i#comments) C) Does something like Heroku , which provides additional services over Amazon EC2, prove to be better than raw cloud management? It is not that we are trying for premature scaling, we just want to have a good start so that we are ready to handle unpredicted growth and scale.

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• linux ftp server with virtual users

  - by kjertil

  i know there are already similar questions for this matter but the answers doesn't really make much sense to anyone who is not really technically comfortable in Linux. I've already tried articles like these for example: http://howto.gumph.org/content/setup-virtual-users-and-directories-in-vsftpd/ with the result of accidently breaking the whole system. The problem is that, while there are several technical possibilities to set up virtual users with a FTP server, it is not as easy as managing for instance a Filezilla server on Windows. I've seen some Web based GUI's but most of them seems to be out of date. The different flavours of Linux and the large amount of different popular FTP servers also seems to make the matter more complicated. I guess my question is, is there a way, to set up virtual FTP users on Linux without the hastle of having to manually edit PAM, MYSQL and config files?

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• Should I make up my own HTTP status codes? (a la Twitter 420: Enhance Your Calm)

  - by Max Bucknell

  I'm currently implementing an HTTP API, my first ever. I've been spending a lot of time looking at the Wikipedia page for HTTP status codes, because I'm determined to implement the right codes for the right situations. Listed on that page is a code with number 420, which is a custom code that Twitter used to use for rate limiting. There is already a code for rate limiting, though. It's 429. This led me to wonder why they would set a custom one, when there is already a use case. Is that just being cute? And if so, then which circumstances would make it acceptable to return a different status code, and what, if any problems may clients have with it? I read somewhere that Mozilla doesn't implement the joke 418: I’m a teapot response, which makes me think that clients choose which status codes they implement. If that's true, then I can imagine Twitter's funny little enhance your calm code being problematic. Unless I'm mistaken, and we can appropriate any code number to mean whatever we like, and that only convention dictates that 404 means not found, and 429 means take it easy.

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• Any examples of fair mmo games with quick completion

  - by Keith Player

  I'm looking for some example games for inspiration that allow from 10 to a large number of players at a time and can be completed in 10 to 30 minutes. I'm looking for something that would have extremely low bandwidth and not be dependent on chance or luck (i.e one player can't gain an unfair advantage because the computer put them in a better position). Realized on the way home that more clarifications might have been helpful. I'm looking to develop a pay-to-play competition that would allow a large number of players to compete in a relatively short period of time. One way would be to have an mmo that can be completed in 30 minutes, another way would be if you could have 10 person games that finish in under 5 minutes and then have the winners compete against each other until a winner is decided. I'm interested in any genre that would make for a fun/interesting game that doesn't depend on luck, so all players should have the same choice/availability of activities/resources and follow the same rules. Some possible games that could possibly be modified into what I want, would be bztanks (too easy to create a bot), diplomacy (takes too long), risk, some chess like game. I was just wondering if there are other game types to the ones I have been considering.

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• windows 2008 R2 TS printer security - can't take owership

  - by Ian

  I have a Windows 2008 R2 server with Terminal server role installed. I'm seeing a problem with an ordinary user who is member of local printer operators group on the server. If the user opens a cmd window using ‘run as administrator’ they can run printmanager.msc without needing to enter their password again. In printmanager they can change the ownership of redirected (easy print) printers without problems. If, from the same cmd window, they use subinacl to try and change the onwership of the queue to themselves they get access denied: >subinacl.exe /printer "_#MyPrinter (2 redirected)" /setowner="MyDom\MyUsr" Elapsed Time: 00 00:00:00 Done: 1, Modified 0, Failed 1, Syntax errors 0 Last Done : _#MyPrinter (2 redirected) Last Failed: _#MyPrinter (2 redirected) - OpenPrinter Error : 5 Access denied so, same context, same action but one works and one doesn't. Any ideas for this odd behaviour? I'm using subinacl x86 on an x64 server as I can't find anything more up to date. I've tried with icacls and others but couldn't get them to do anything with printers.

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• Linux: set up media server to stream video via the Internet?

  - by Hassan

  How do I set up a media server in Linux which streams video over the internet? Is it easy to do this? I want a server that will actually encode video in real time to allow it to stream over sometimes slow or unreliable networks. Basically, I want a server that works on the internet. I have a directory with a bunch of video files, and want to make this accessible to myself remotely. For other situations, I found great and useful software (such as the PS3 media server). I'd like to find something equally as useful for streaming video over the internet.

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• Testing a codebase with sequential cohesion

  - by iveqy

  I've this really simple program written in C with ncurses that's basically a front-end to sqlite3. I would like to implement TDD to continue the development and have found a nice C unit framework for this. However I'm totally stuck on how to implement it. Take this case for example: A user types a letter 'l' that is captured by ncurses getch(), and then an sqlite3 query is run that for every row calls a callback function. This callback function prints stuff to the screen via ncurses. So the obvious way to fully test this is to simulate a keyboard and a terminal and make sure that the output is the expected. However this sounds too complicated. I was thinking about adding an abstraction layer between the database and the UI so that the callback function will populate a list of entries and that list will later be printed. In that case I would be able to check if that list contains the expected values. However, why would I struggle with a data structure and lists in my program when sqlite3 already does this? For example, if the user wants to see the list sorted in some other way, it would be expensive to throw away the list and repopulate it. I would need to sort the list, but why should I implement sorting when sqlite3 already has that? Using my orginal design I could just do an other query sorted differently. Previously I've only done TDD with command line applications, and there it's really easy to just compare the output with what I'm expected. An other way would be to add CLI interface to the program and wrap a test program around the CLI to test everything. (The way git.git does with it's test-framework). So the question is, how to add testing to a tightly integrated database/UI.

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• Are there any tools for monitoring individual Apache virtual hosts in real-time?

  - by Dave Forgac

  I'm looking for a way to monitor and record Apache traffic, separated by virtual host. I am currently using Munin to capture this and other data for the entire server however I can't seem to find a way to do this by vhost. This link describes using a module called mod_watch which is apparently no longer in development: http://www.freshnet.org/wordpress/2007/03/08/monitoring-apaches-virtualhost-with-munin/ The file that is listed as being compatible with Apache 2.x is reported to have problems with missing vhosts an reporting data correctly. Does anyone know of a reliable way to determine real-time traffic per vhost? If I can find this it should be easy enough to write a new Munin plugin.

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• C drive should only contain OS. Myth or fact?

  - by Fasih Khatib

  So, I have a 500GB HDD @7200RPM. It is split as: C: 97GB D: 179GB E: 188GB My belief is to keep OS ONLY in C:\ and any adamant programs that won't go anywhere apart from C:\ [because this speeds up the PC during startup process] and install programs in D:\ so that in case I have to reinstall the OS, I will have the programs readily available after reinstall. But I have begun to think this approach is flawed because if C:\ is formatted, I will lose registry values and stuff that goes in %appdata% and so it is no use keeping programs in D:/ drive because they will be useless after all. Should I go ahead and install ALL of my programs in C:\ and then use D:\ and E:\ for storing my data like photos, text files, java files n all? How will this impact the performance of the HDD? I only have 3 programs in D:\Program Files so it will be easy to reinstall them :)

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• Vim: I don't want to insert!!!

  - by bhh1988

  I could not find anything online addressing this problem, which is surprising. The problem is that I find it very easy to accidentally insert stuff in Vim. I know I can undo by with 'u', but it still is quite annoying and frequent. Often, I enter a command like 'sp file.txt' without realizing that I haven't entered the ':' character yet (so I'm not yet on the command line). Unfortunately, there are several characters that take you to insert mode, including 's', 'a', 'i', 'o'. I'd rather have insert mode mapped to just one keybinding which is very deliberate, like shift-space. Can anyone point me to something that might have what I'm looking for? Thanks.

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• Trac/SVN to DVCS Migration

  - by quanticle

  The project I'm currently working on is using Trac, with SVN integration. It's worked great until now. Now, however, we've taken on some additional developers and we're running into issues with branching and merging. Because of this, I think a move to a distributed version control system is in order. The problem is that Trac is very closely integrated with the SVN repository. We have tight integration between the tickets and the revision numbers of code changes corresponding to those tickets. In addition we have a support wiki that has a lot of data that helps the tech. support team. Is there a way we can migrate to git or mercurial without losing the benefits of Trac? I've looked at the git plugin for Trac, and I'm unsure of how well it works. Has anyone here used it with a project that's been migrated from SVN? EDIT: I should note that the most important priority for us is maintaining the links between Trac tickets and the corresponding changesets in SVN. That's a tool that we use every day, and it provides an easy way to jump to code changes when reviewing tickets. Wiki migration would be nice to have, but if it's not possible, we can continue to run the old system whilst we write some kind of a one-off script to migrate the content.

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• Weird UIView transforms in Retina iPhone

  - by ggambett

  I'm having a problem I don't understand. I'm developing an OpenGL app for iOS. Because at some points I want to force the orientation of the view programatically, and Apple for whatever reason doesn't make it easy (or even possible), I'm doing it by hand. I return always NO in shouldAutoRotateToInterfaceOrientation, and when I want to change the orientation (to portrait, for example), I do something like this in the UIView: [self setTransform:CGAffineTransformMake(1, 0, 0, 1, 0, 0)]; [self setBounds:CGRectMake(0, 0, 768, 1024)]; This works fine. In order to support Retina devices, I started checking [UIScreen mainScreen].scale, and setting self.contentScaleFactor accordingly. I also modified the code above to account for the new dimensions, like this: [self setTransform:CGAffineTransformMake(1, 0, 0, 1, 0, 0)]; [self setBounds:CGRectMake(0, 0, 2*768, 2*1024)]; Same rotation, different size. The weird result with this is that I get a "screen" with the right size, but offsetted half a screen to the bottom and the left. To correct for this, I need to do the following: [self setTransform:CGAffineTransformMake(1, 0, 0, 1, 0, 0)]; [self setBounds:CGRectMake(-768, -1024, 2*768 - 768, 2*1024 - 1024)]; This works, but it's ugly, I also need to make similar corrections when I get touch coordinates, and worst of all, I don't understand what's going on or why the above "correction" works. Can anyone shed some light on this issue?

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• Corporate Efficiency

  - by AndyScott

  Thoughts on streamlining the process of getting someone up to speed when they join a project as a new hire; or as is common in some companies, switch from one project to another: Has anyone heard of a strategy (including emphasis towards consistent, ongoing documentation) that would bring a user up to speed quickly? Has there been any thought given to focused documentation, specific to a role within a project? Or formalized mentoring within a project, that goes beyond a “system walkthrough”?   Often it's overlooked what time is wasted when a senior level worker is brought on board.  It's assumed that they will know the right questions to ask. They are the type of people that normally learn quickly, and in their own ways, so let them get by with what's out there.   Having a user without a computer will cost you measurable worker hours, making it an easy target to shoot at (and rightly so). Not getting them up to speed as quickly as possible is an efficiency issue, that seems to have become an industry standard as an accepted loss. Given the complexity of the projects within most companies, and the frequency with which users are shifted from one project to another based on need; I think this is an area that bears consideration.

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• Webmatrix The Site has Stopped Fix

  - by Tarun Arora

  I just got started with AzureWebSites by creating a website by choosing the Wordpress template. Next I tried to install WebMatrix so that I could run the website locally. Every time I tried to run my website from WebMatrix I hit the message “The following site has stopped ‘xxx’” Step 00 – Analysis It took a bit of time to figure out that WebMatrix makes use of IISExpress. But it was easy to figure out that IISExpress was not showing up in the system tray when I started WebMatrix. This was a good indication that IISExpress is having some trouble starting up. So, I opened CMD prompt and tried to run IISExpress.exe this resulted in the below error message So, I ran IISExpress.exe /trace:Error this gave more detailed reason for failure Step 1 – Fixing “The following site has stopped ‘xxx’” Further analysis revealed that the IIS Express config file had been corrupted. So, I navigated to C:\Users\<UserName>\Documents\IISExpress\config and deleted the files applicationhost.config, aspnet.config and redirection.config (please take a backup of these files before deleting them). Come back to CMD and run IISExpress /trace:Error IIS Express successfully started and parked itself in the system tray icon. I opened up WebMatrix and clicked Run, this time the default site successfully loaded up in the browser without any failures. Step 2 – Download WordPress Azure WebSite using WebMatrix Because the config files ‘applicationhost.config’, ‘aspnet.config’ and ‘redirection.config’ were deleted I lost the settings of my Azure based WordPress site that I had downloaded to run from WebMatrix. This was simple to sort out… Open up WebMatrix and go to the Remote tab, click on Download Export the PublishSettings file from Azure Management Portal and upload it on the pop up you get when you had clicked Download in the previous step Now you should have your Azure WordPress website all set up & running from WebMatrix. Enjoy!

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• How to convince an employer to move to VB.Net for new development?

  - by Dabblernl

  Some history:For the last six months I have been employed at a small firm with just three programmers, my employer among them. The firm maintains two programs written in VB6. I am asssigned as the lead programmer to one of these. In the last six months I did some maintenance and bug hunting, but created some new functionality too. I had an interview last december, which was favorable, and my contract was prolonged. I am very happy with this course of events as I only obtained a .Net certification a year ago and have no other qualifications (in the field of coding, that is). It is my strong opinion that, while migration of the existing program to .Net is advisable, it is paramount that from now on the new functionality should be written in VB.Net class libraries. After some study I found out how simple it is to integrate .Net class libraries into the VB6 development environment and how easy it is to add their functionality to existing installations by using application manifests. So, I have decided that now is the moment to roll up my sleeves and try and convince my employer that he should let me develop new code in VB.Net, using VB6 for maintenance only. We get along quite well, but I think I am going to need all the ammunition I can get to convince him. Any arguments, preferably backed up up ones, are very welcome, even arguments to dissuade me ;-)

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• PHP Runs Very Slow on IIS7. Need Help optimizing our config

  - by Kendor

  Am running a PHP based web app on our Windows 2008 cloud-based server. The app, which runs fine outside of our environment (e.g. a different IIS server), but is VERY slow in our environment. Based on googling this is a relatively common situation. I installed PHP and MySQL via the IIS web deployment method... Here's our setup: Windows 2008 Server Enterprise SP2 (32-bit) Microsoft-IIS/7.0 MySQL client version: mysqlnd 5.0.8-dev - 20102224 $Revision: 321634 $ PHP extension: mysqli Update for IIS 7.0 FastCGI Windows Cache Extension 1.1 for PHP 5.3 I had read elsewhere that ipv6 might be an issue, so I turned this off on the network adapter. The app is using: localhost as its connection Be easy on me, as I'm a bit green about some of these components... Also, rewriting the PHP app or modifying it is NOT an option. I'm reasonably SURE that our config is the issue.

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• How do I put back different SCSI hard drives into their original RAID arrays across different servers?

  - by Edgar

  I have potentially a big mess in my hands: I received today a box with several hard drives that used to be connected to different servers each one of them using an unknown - at least as of right now- RAID configuration. Regretfully, these are not marked and I'm not sure how to go about putting them back into their original servers. Currently I don't have much more information: I don't know what type of array was being used on each instance and I don't have any specifics about the RAID controller originally used on each one of the servers (currently these servers are at a remote location with no easy access). Is there a way to sort through this mess? What would be the consequences of using trial and error to go about it? This might be a very basic question but I don't have much experience dealing with RAID arrays.

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• Why are my hardware tabs disabled for my VMWare player image?

  - by djangofan

  I just installed a Ubuntu 10.10 image on VMWare player and after I finished installing I was messing with the hardware settings and I did the following: 1. disabled the floppy device 2. changed the CDRom to "use system cdrom" 3. tried to enable the VMWare tools but it complained that the vm was in "Easy Install" mode After I fiddled with the VM now my floppy and 2 CD rom devices as well as sound card and USB settings are all disabled in the VM hardware settings. Any idea on why this occurred and how to fix it?

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• is there a way to have VIM do incremental search on text files?

  - by Alex

  Is there a way to have VIM do incremental search on text files? Vim already does incremental search within the currently open file. Examples of programs that demonstrate the type of search I'm trying to accomplish are Notational Velocity for MacOS, Resop for windows or SimpleNote for the web. These apps do an instant or incremental search in the files of a specific directory and make it easy/fast to narrow down the file you are looking for or create a new file. I use both but would rather live in one editor.(that being VIM) Is there some plug in that would do this?

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• How to identify which website on my instance is receiving lots of traffic?

  - by Bob Flemming

  I am new to server administration and have just setup a new quad core instance which hosts around 15 websites. Over the past couple of days my server load has been averaging at around 15.00. I believe it is because of one (or maybe more) websites are getting spammed by spambots. Typing 'top' at the command line shows many processes from user 'www-data' which indicates lots of web traffic. Is there an easy way identify which one of my sites is taking a hammering? Reading the apache error logs is a very difficult tasks as most of the websites receive daily traffic of 10,000 + unique users. Any help would be appreciated!

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• IIS 6.0 mitigating BEAST

  - by D3l_Gato

  Recently, my PCI assessor informed me that my servers are vulnerable to BEAST and failed me. I did my homework and I want to change our webservers to prefer RC4 ciphers over CBC. I followed every guide I could find... I changed my reg keys for my weaker than 128bit encryption to Enabled = 0. completely removed the reg keys for the weaker encryptions. I downloaded IISCrypto and unchecked everything but RC4 128 ciphers and triple DES 168. My webserver still prefers AES-256SHA. Is there a trick in IIS 6.0 to get your webservers to prefer RC4 ciphers that I am not figuring out? It seems like in IIS 7 they made this very easy to fix but that doesn't help me now!

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• Is it possible to use bittorrent for a fileserver

  - by sris

  I would like to set up a file server that is searchable, preferable via the web. I'm wondering if it would be possible to achieve this using the bittorrent protocol and have a single client sharing every single torrent on the server. I guess I could use some available tracker solution for the webinterface or write one myself. My concerns are the if there are any limits to the number of torrents a single client can share since this may potentially be 10k torrents. The number of downloading clients is very small, only myself and my relatives. The idea is to have a single place to host everything from vacation photos to musical creations. Is there any other options for this kind of file server. It should also be easy to upload files to the server.

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