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  • Is it possible to use two different ErrorDocuments for different paths of a website?

    - by tapwater
    this is my first question on stackexchange and it might be a bit confusing. I currently run PmWiki (sorry, you'll have to google it, new user can only have 2 hyperlinks) at mydomain.com/pmwiki. I have a 404 page and .htaccess set up in my site's document root for 404 pages regarding anything that doesn't have to do with my wiki. By default, PmWiki handles URLs a little confusingly so I had to use this in order to get it to look like mydomain.com/pmwiki/Namespace/Page I had to create a .htaccess in /pmwiki to remove parts of the URL. PmWiki also has a custom 404 (Site/PageNotFound) page that has stopped working, now my site uses the /404.htm page. I noticed this when trying to install this "recipe" to enable case-insensitive URLs. Currently the only way to access Site/PageNotFound is by actually linking to it, and, if you read how that recipe seems to function, this is an issue. Currently mydomain.com/pmwiki/blahblah and mydomain.com/pmwiki/legitimate_namespace_but_lowercase/legitimate_lowercase_page_name both direct to mydomain.com/404.htm. I have to admit I'm very confused, and I apologize if I was unclear in any of this, but I could definitely use some help. Thanks!

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  • Using 2d collision with 3d objects

    - by Lyise
    I'm planning to write a fairly basic scrolling shoot 'em up, however, I have run into a query with regards to checking for collision. I plan to have a fixed top down view, where the player and enemies are all 3d objects on a fixed plane, and when the enemy or player fires at the other, their shots will also be along this fixed plane. In order to handle the collision, I have read up a bit on collision detection in 3d, as it is not something I have looked into previously, but I'm not sure what would be ideal for this situation. My options appear to be: Sphere collision, however, this lacks the pixel precision I would like Detection using all vertexes and planes of each object, but this seems overly convoluted for a fixed plane of play Rendering the play screen in black and white (where white is an object, black is empty space), once for enemies and once for the player, and checking for collisions that way (if a pixel is white on both, there is a collision) Which of these would be the best approach, or is there another option that I am missing? I have done this previously using 2d sprites, however I can't use the same thinking here as I don't have the image to refer to.

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  • What is meant by "no password set" for root account (and otthers)?

    - by MMA
    Several years back, we were more accustomed to changing to the root account using the su command. First, we switched to the root account, and then executed those root commands. Now we are more accustomed to using the sudo command. But we know that the root account is there. We can readily find the home directory of user root. $ ls -ld /root/ drwx------ 18 root root 4096 Oct 22 17:21 /root/ Now my point is, it is stated that "the root password in Ubuntu is left unset". Please see the answers to this question. Most of the answers have something to this effect in the first paragraph. One or two answers further state that "the account is left disabled". Now my (primary) questions are, What is meant by an unset password? Is it blank? Is it null? Or something else more cryptic? How does the account becomes enabled once I set password for it? (sudo password root) In order get a better understanding, I checked the /etc/shadow file. Since I have already set a password for the root account, I can no longer see what is there (encrypted password). So, I created another account and left it disabled. The corresponding entry in the /etc/shadow file is, testpassword:!:16020:0:99999:7::: Now perhaps my above queries need to be changed to, what does an ! in password field mean? Other encrypted passwords are those very long cryptic strings. How come this encrypted form is only one character long? And does an account become disabled if I put an ! in the (encrypted) password field?

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  • Reverse Proxy Server SSL?

    - by valveLondon
    Context We currently have an Apache web server in the DMZ set up as a reverse proxy and load balancer for two machines running Windows Server 2008 (IIS) inside. The Apache server has a genuine SSL certificate and serves up both http and https, however, the balancer members in the load balancing section are set to: BalancerMember {https://server1} and {https://server2}. The IIS web servers have self-signed certificates in order to respond to the https requests. My question: Do we need to forward any requests from Apache (in the DMZ) to the inside using SSL? e.g can the reverse proxy forward the requests using HTTP? and if so, why would I choose to forward them with SSL? (how secure is the http line between the dmz and the inside); In other words, can I totally disable SSL on my inside web servers?

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  • How should I structure the implementation of turn-based board game rules?

    - by Setzer22
    I'm trying to create a turn-based strategy game on a tilemap. I'm using design by component so far, but I can't find a nice way to fit components into the part I want to ask. I'm struggling with the "game rules" logic. That is, the code that displays the menu, allows the player to select units, and command them, then tells the unit game objects what to do given the player input. The best way I could thing of handling this was using a big state machine, so everything that could be done in a "turn" is handled by this state machine, and the update code of this state machine does different things depending on the state. However, this approach leads to a large amount of code (anything not model-related) going into a big class. Of course I can subdivide this big class into more classes, but it doesn't feel modular and upgradable enough. I'd like to know of better systems to handle this in order to be able to upgrade the game with new rules without having a monstruous if/else chain (or switch / case, for that matter). Any ideas? What specific design pattern other than MVC should I be using?

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  • how to protect php app (vbulletin) from hackers

    - by samsmith
    Our vBulletin system is under constant attack, raising cpu load and making the system very slow for legit users. The attack is a script type attack that is attempting to log in and/or create new login ids (mostly it is trying to create login ids in order to spam the site). In vBulletin, we have black listed large ranges of ips, which has helped a lot, but the attacks continue. Is there an automated way to protect the application or web server? ideally, the protection would detect the pages accessed and automatically black list the ip.

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  • http 301 redirection issue

    - by Guilhem Soulas
    I'm a little bit lost with a redirection. I want mysite.com, www.mysite.com and www.mysite.co.uk to redirect to mysite.co.uk. In Apache, I wrote this for mysite.co.uk in order to redirect www to the root domain: RewriteEngine on RewriteCond %{HTTP_HOST} ^www RewriteRule ^/(.*) http://mysite.co.uk/$1 [L,R=301] And for mysite.com, I wrote this redirect to mysite.co.uk: ServerName www.mysite.com RewriteEngine on RewriteRule ^/(.*) http://mysite.co.uk/$1 [L,R=301] This way, I can make the redirection work properly from www.mysite.com to mysite.co.uk, but it doesn't work for mysite.com too mysite.co.uk (without the www) at the same time. Could someone tell me how to make all my redirections work in all cases?

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  • jQuery - upgrade from version 1.6.x to 1.7

    - by Renso
    Goal: Issues to consider when upgrading from jQuery version 1.6 to 1.7. This is a short list and may help identify the real issues you need to concern yourself with in stead of reading through all the release notesSummary of issues encountered during upgrade:As you prepare for upgrade to jQuery 1.7 from 1.6.x, this is a quick glimpse of all the issues that are relevant, not sure if it covers all but may be all you need to worry about.Use this method only for checking checkboxes and radio buttons:$("input:checked")http://api.jquery.com/checked-selector/This will work regardless of the version of jQuery you are using. Note that $("input).attr("checked") returns true prior to jQuery 1.6. Only retrieve "real" attributes with "attr", in order versions it would also retrieve properties like "tagName", this no longer works with jQuery 1.6.1+Why does $("input").attr("checked") no longer (from version 1.6.1+) return TRUE or FALSE, because if you look at the HTML (as well as W3C spec) it does not contain a true/false, but the value checked="checked", which is what it should have returned in the first place. $("input").prop("checked") works, return true, because there is in fact a DOM property for "checked" with the value being "true" or "false".Furthermore, if you want to upgrade to jQuery 1.7 you should only have to worry about this for most part:1. isNumeric() is new, be careful as the older version jQuery.isNaN() has been deprecated2. jqXHR success and error have been deprecated3. When rendering content with text(), white space issue cross-browsers: http://bugs.jquery.com/ticket/3144Other than the issues above I am not aware of any deprecations you need to worry about.Hope this helps to get everyone up to version 1.7

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  • How can I access cpu temperature readings using c#?

    - by Paul
    For a programming project I would like to access the temperature readings from my CPU and GPUs. I will be using C#. From various forums I get the impression that there is specific information and developer resources you need in order to access that information for various boards. I have a MSI NF750-G55 board. MSI's website does not have any of the information I am looking for. I tried their tech support and the rep I spoke with stated they do not have any such information. There must be a way to obtain that info. Any thoughts?

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  • How to get Apache to follow symlink instead of downloading it?

    - by user792445
    I am just using the standard apache config file which mentions that it follows symlinks, but when I hit the url http://localhost/test it downloads the symlink file instead of following it. What config do I need to change to get apache to follow the symlink instead of downloading it? This is an ls on the directory: $ ls -al total 10 drwx------+ 1 SYSTEM SYSTEM 0 Oct 20 10:55 . drwx------+ 1 SYSTEM SYSTEM 0 Aug 26 12:27 .. -rw-r--r--+ 1 me None 47 Oct 20 10:14 index.html lrwxrwxrwx 1 me None 29 Oct 19 17:10 test -> /home/me/projects/test This is in my apache config file: <Directory "D:/Program Files (x86)/Apache Software Foundation/Apache2.2/htdocs"> Options Indexes FollowSymLinks AllowOverride None Order allow,deny Allow from all </Directory>

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  • Running a script on startup before X starts in Ubuntu 9.10

    - by Epcylon
    I have a script that I want to run at startup to switch X-configs depending on location, but I can't seem to find out where to put it in order to get it to run before X is started. This results in me having to restart X to get it to run the correct config. Currently, my script is located in /etc/init.d/whereami, with symlinks in /etc/rc[2-5].d/S25whereami. I was trying to find out when X is started, in case the problem is simply the 25, but I can't seem to find the answer... Any help is appreciated.

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  • Emailing Service: To or Bcc?

    - by Shelakel
    I'm busy coding a reusable e-mail service for my company. The e-mail service will be doing quite a few things via injection through the strategy pattern (such as handling e-mail send rate throttling, switching between Smtp and AmazonSES or Google AppEngine for e-mail clients when daily quotas are exceeded, send statistics tracking (mostly because it is neccessary in order to stay within quotas) to name a few). Because e-mail sending will need to be throttled and other limitations exist (ex. max recipient quota on AmazonSES limiting recipients to 50 per send), the e-mails typically need to be broken up. From your experience, would it be better to send bulk (multiple recipients per e-mail) or a single e-mail per recipient? The implications of the above would be to send to a 1000 recipients, with a limit of 50 per send, you would send 20 e-mails using BCC in a newsletter scenario. When sending an e-mail per recipient, it would send 1000 e-mails. E-mail sending is asynchronous (due to inherit latency when sending, it's typically only possible to send 5 e-mails per second unless you are using multiple client asynchronously). Edit Just for full disclosure, this service won't be used by or sold to spammers and will as far as possible automatically comply with national and international laws. Closed< Thanks for all the valuable feedback. The concerns regarding compliance towards laws, user experience (generic vs. personalized unsubscribe) and spam regulation via ISP blacklisting does make To the preferred and possibly the only choice when sending system generated e-mails to recipients.

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  • How to copy a button with shadow effect from PSD to PNG

    - by Alex
    I got a web site design in PSD file from a web-designer. All element s there snap to guides, which is handy when I make a selection to copy an element of design to a PNG file: guides make my selection precise. One button there has two states: normal and hover. Both states contains of several layers. So I am trying to copy both states as PNG files in order to make a nice button in html. The problem is that both states have shadow effects, which go beyond the layers' edges, i.e. when I try to select a button my selection (snapped to guides) does not include an outer part of the shadow. How do I make a precise selection of the button state in such situation?

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  • force installation of cPanel VPS optimized

    - by Anoosh Ravan
    I have a dedicated server which I have virtualized with ESXi 5.0 . In the VPS ( CentOS 5.7 64 bit ) when I do install cPanel with the help of the documentation, it always installs the Accelerated 2 edition, which I have learnt is meant for dedicated server not VPS es. I want to install the VPS optimized edition. Can anyone help me how to force installation of cPanel VPS Optimized on the VPS? How does cPanel detect if it should install as Acc. or VPSO. ? Do I have to install ESXi 5.0 tools into the VPS in order to achieve this? Thanks!

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  • EC2 Image to start

    - by HD.
    I'm starting to test EC2 for a couple of new projects. I need to choose an AMI (Amazon Machine Image) and Amazon offered me as first option Fedora Core 8, which is a very old version of one of my favorites distributions. There is a lot of choices, but it's not clear for me which one is the better option. I have my own reasons in order to choice a distro and a version when I need to install a new server but I don't know If I can apply the same for EC2. I know there is a beta for RHEL, how stable is this beta?, How can I choose between all the CentOS AMIs in the list? So this is my question: Do you recommend an AMI to start with EC2? Thanks

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  • I can write code...but can't design well. Any suggestions?

    - by user396089
    I feel that I am good at writing code in bits and pieces, but my designs really suck. The question is how do I improve my designs (in order to become a better designer). I think schools and colleges do a good job of teaching people as to how to become good at mathematical problem solving, but lets admit the fact that most programs taught at school are generally around 1000 - 2000 lines long, which means that it is mostly an academic exercise and no way reflects the complexity of real world software (a few hundred thousand to millions of lines of code). This is where I believe that even projects like topcoder/project euler also won't be of much help, they might sharpen your mathematical problem solving ability - but you might become a theoretician programmer; someone who is more interested in the nice, clean stuff, and someone who is utterly un-interested in the day to day mundane and hairy stuff that most application programmers deal with. So my question is how do I improve my design skills? That is the ability to design small/medium scale applications that will go into a few thousand of lines of code? How can I learn design skills that would help me build a better html editor kit, or some graphics program like gimp?

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  • Transfer disk image to larger/smaller disk

    - by forthrin
    I need to switch the hard drive on a 2006 iMac to a new SSD. I don't have the original installation CDs. I know I can order CDs from Apple, but this costs money. Someone told me it's possible to rip the image of the old drive and transfer to the new drive. If so, does the size of the new drive have to be exactly the same as the old? If not, my questions are: Is it possible to "stretch" the image from 120 MB disk to a 256 MB disk (numbers are examples)? If so, what is the command line for this? Likewise, is it possible to "shrink" an image from a larger disk (eg. 256 MB) to a smaller disk (eg. 120 MB), provided that the actual space used on the disk does not exceed 120 MB? How do you do this on the command line?

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  • Router for Infrastructure Network

    - by amfortas
    We have an HPC operation that down the years has grown to several racks of gear at three sites, hooked up via Gigabit fiber and Catalyst 2960s (we control the links and switches). Thus far all machines have been on a flat RCF1918 10/8 but we are looking to segment the network in order to streamline matters for iSCSI and generally keep infrastructure equipment away from our end-users. We have now reached a point where we need to consider introducing VLANs for specific subnets and are wondering if it would be worthwhile in the longer run to acquire a small router to keep to keep track of all this stuff and cut down on the complexity of netmasks and routes on host machines, etc. Has anyone here had a similar experience? Suggestions as to suitable equipment would be welcome.

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  • cookie not being sent when requesting JS

    - by Mala
    I host a webservice, and provide my members with a Javascript bookmarklet, which loads a JS sript from my server. However, clients must be logged in, in order to receive the JS script. This works for almost everybody. However, some users on setups (i.e. browser/OS) that are known to work for other people have the following problem: when they request the script via the javascript bookmarklet from my server, their cookie from my server does not get included with the request, and as such they are always "not authenticated". I'm making the request in the following way: var myScript = eltCreate('script'); myScript.setAttribute('src','http://myserver.com/script'); document.body.appendChild(myScript); In a fit of confused desperation, I changed the script page to simply output "My cookie has [x] elements" where [x] is count($_COOKIE). If this extremely small subset of users requests the script via the normal method, the message reads "My cookie has 0 elements". When they access the URL directly in their browser, the message reads "My cookie has 7 elements". What on earth could be going on?!

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  • Nginx config with try_files and rewrite : precedence?

    - by Penegal
    Good morning, everybody. Firstly, this question may have been already asked, but I searched ServerFault during about 15 minutes without finding it, so, if it was already asked, please accept my apologies. I'm trying to rationalize my Nginx server config, but I have a rather dumb question that I couldn't solve, even with extensive Web search, except if I totally f*cked my search. Here is the question : is try_files parsed before or after rewrite ? Asked differently, Do I have to put try_files after all rewrite directives, or is Nginx config parser smart enough to evaluate try_files after all relevant rewrite directives ? The link with the config rationalization is that the answer to this question will change the organisation of the config, ie if config file order of try_files and rewrite changes the config behaviour, it will force me to disperse my includes, some of them containing try_files and other ones containing rewrite, because I also have rewrite directly in nginx.conf. Hoping you can help me, Regards.

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  • Getting Requirements Right

    - by Tim Murphy
    Originally posted on: http://geekswithblogs.net/tmurphy/archive/2013/10/28/getting-requirements-right.aspxI had a meeting with a stakeholder who stated “I bet you wish I wasn’t in these meetings”.  She said this because she kept changing what we thought the end product should look like.  My reply was that it would be much worse if she came in at the end of the project and told us we had just built the wrong solution. You have to take the time to get the requirements right.  Be honest with all involved parties as to the amount of time it is taking to refine the requirements.  The only thing worse than wrong requirements is a surprise in budget overages.  If you give open visibility to your progress then management has the ability to shift priorities if needed. In order to capture the best requirements use different approaches to help your stakeholders to articulate their needs.  Use mock ups and matrix spread sheets to allow them to visualize and confirm that everyone has the same understanding.  The goals isn’t to record every last detail, but to have the major landmarks identified so there are fewer surprises along the way. Help the team members to understand that you all have the same goal.  You want to create the best possible solution for the given business problem.  If you do this everyone involved will do there best to outline a picture of what is to be built and you will be able to design an appropriate solution to fill those needs more easily. Technorati Tags: requirements gathering,PSC Group,PSC

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  • How to Program AWS Spot Instances to Strategically Bid So the Auction is Never Lost Until a Competitor Beats the Maximum I'm Willing to Pay?

    - by Taal
    I believe I'm in the right section of stack exchange to ask this. If not, let me know. I only use Amazon Web Services for temporary type hosting services, so the spot instances are quite valuable to me. I would also just make an instance and start and stop it - but - that doesn't necessarily fit my bootstrapped budget sadly. Anyways, it really kills me when someone outbids me on a spot instance I have (I tend to go for the larger ones which there are fewer of available) and I get randomly kicked off. I know or at least I believe there is a way to program in something somehow to dynamically change your bidding price to beat a potential competitor's if their's is higher than yours. Now, I previously believed Amazon would just charge me for the highest price right above the next lowest competitor automatically (eliminating the need for this) - so if I bid too high, then I only pay what I would of needed to in order to win and keep the auction. Essentially, I thought my bid price was my max bid price. Apparently, according to my bills and several experiments I've done - this is not the case. They charge me for whatever I bid even when I know there is no one else around to counter bid me. I needed to clarify that, but let me get back to the main point: Let's say I'm bidding $0.50, competitor comes in and bids 0.55 cents. I get kicked off. I want to have it to where I'd set a maximum I'm willing to pay (let's say $1.00 here), and then when competitor comes in and tries to bid $.55, my bid is dynamically adjusted to beat his at $0.56 up until he breaks my $1.00 threshold. I've been reading the guides and although they are more or less straightforward, I feel like they leave a few holes in them that end up confusing me. Like, for instance, where do I input said command or when do I do it? Maybe I'm just tech illiterate and need help deciphering these guides. A good start for someone willing to answer/help me decipher this problem would be here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/spot-as-update-bid.html

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  • License compatibility question

    - by Ivaylo Slavov
    I have a question regarding software licenses. I plan to put a license to a framework that I have written. My intention is that the license should be open, in order to maintain a community. Also I want to control when a new version is released and which changes will be included. The license should allow the framework to be used with commercial products, therefore respecting their own license. I have done some quick research and I decided to double license my work under the Apache License 2.0 (ASL) and Eclipse Public License (EPL). My point is that the EPL will provide me the ability to control the release cycle as well as the contributions to the project and the Apache license will take care for any patents a 3rd party might want to use in a derived work. Also both are open licenses. My question is related to the GLP and LGPL licenses. If I have the above licenses to my framework, will it be possible and legal, for someone to create a derived work of my framework, that is also a derived work of, or links a library that is under the LGPL license? Thanks in advance. EDIT: To be clear I will explain how I expect things to work. The framework will define some common API for certain functionalities as well as a Wrapper class that will invoke an implementation of that API. The Wrapper will be part of the framework, but it will internally call the actual implementation. This implementation should be in a separate library, and such libraries I would like to be developed and maintained by community. Surely the community will have to access the framework but I want to limit changes to the framework by the community but I want to provide freedom for any API implementation (a derived work of the framework). The framework will enable flexible configuration mechanisms that will tell which implementation of an API will be used.

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  • What is the best way to store a table in C++

    - by Topo
    I'm programming a decision tree in C++ using a slightly modified version of the C4.5 algorithm. Each node represents an attribute or a column of your data set and it has a children per possible value of the attribute. My problem is how to store the training data set having in mind that I have to use a subset for each node so I need a quick way to only select a subset of rows and columns. The main goal is to do it in the most memory and time efficient possible (in that order of priority). The best way I have thought of is to have an array of arrays (or std::vector), or something like that, and for each node have a list (array, vector, etc) or something with the column,line(probably a tuple) pairs that are valid for that node. I now there should be a better way to do this, any suggestions? UPDATE: What I need is something like this: In the beginning I have this data: Paris 4 5.0 True New York 7 1.3 True Tokio 2 9.1 False Paris 9 6.8 True Tokio 0 8.4 False But for the second node I just need this data: Paris 4 5.0 New York 7 1.3 Paris 9 6.8 And for the third node: Tokio 2 9.1 Tokio 0 8.4 But with a table of millions of records with up to hundreds of columns. What I have in mind is keep all the data in a matrix, and then for each node keep the info of the current columns and rows. Something like this: Paris 4 5.0 True New York 7 1.3 True Tokio 2 9.1 False Paris 9 6.8 True Tokio 0 8.4 False Node 2: columns = [0,1,2] rows = [0,1,3] Node 3: columns = [0,1,2] rows = [2,4] This way on the worst case scenario I just have to waste size_of(int) * (number_of_columns + number_of_rows) * node That is a lot less than having an independent data matrix for each node.

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  • How to forward traffic using iptables rules?

    - by ProbablePattern
    I am new to iptables and I have been doing Google searches for a few days now without finding a good solution to this problem. I have computer A with a public ip address (say 192.0.2.1) that can access the Internet unrestricted. I have another computer B with a private ip address (192.168.1.1) that can only access computer A. How do I use iptables to forward network traffic from B through A to the Internet? I need to use http, ftp, and https in order to use apt-get with sudo. Both computers run Ubuntu linux. I have tried using Squid but I think it is far too complicated for what I need to do.

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