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Articles indexed in February 2011

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  • Under what circumstances would a Ruby $LOAD_PATH be acquired from a parent process?

    - by Dr Nic
    In my cucumber scenarios, if I call rake db:schema:load within a target Rails app folder, I get the cucumber process's $LOAD_PATH and not the Rails app's own Gemfile/load path. I think this is very weird. The consequence is that I get the following error: no such file to load -- rails/all I can't reproduce it outside of my cucumber scenario. ruby -rubygems -e "system 'rake -T'" works normally - the 'rake -T' has the application's own Gemfile-based $LOAD_PATH; and doesn't generate the error above. Can anyone think why a child process (rake -T or rake db:schema:load or rails runner...; invoked by either system, exec, %x[...] or backtick; would start with the parent processes' $LOAD_PATH (from the cucumber scenario's Gemfile) instead of its own $LOAD_PATH (from the Rails app's Gemfile)?

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  • find the difference between two very large list

    - by user157195
    I have two large list(could be a hundred million items), the source of each list can be either from a database table or a flat file. both lists are of comparable sizes, both unsorted. I need to find the difference between them. so I have 3 scenarios: 1. List1 is a database table(assume each row simply have one item(key) that is a string), List2 is a large file. 2. Both lists are from 2 db tables. 3. both lists are from two files. in case 2, I plan to use: select a.item from MyTable a where a.item not in (select b.item form MyTable b) this clearly is inefficient, is there a better way? Another approach is: I plan to sort each list, and then walk down both of them to find the diff. If the list is from a file, I have to read it into a db table first, then use db sorting to output the list. Is the run time complexity still O(nlogn) in db sorting? either approach is a pain and seems would be very slow when the list involved has hundreds of millions of items. any suggestions?

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  • Efficient mapping for a particular finite integer set

    - by R..
    I'm looking for a small, fast (in both directions) bijective mapping between the following list of integers and a subset of the range 0-127: 0x200C, 0x200D, 0x200E, 0x200F, 0x2013, 0x2014, 0x2015, 0x2017, 0x2018, 0x2019, 0x201A, 0x201C, 0x201D, 0x201E, 0x2020, 0x2021, 0x2022, 0x2026, 0x2030, 0x2039, 0x203A, 0x20AA, 0x20AB, 0x20AC, 0x20AF, 0x2116, 0x2122 One obvious solution is: y = x>>2 & 0x40 | x & 0x3f; x = 0x2000 | y<<2 & 0x100 | y & 0x3f; Edit: I was missing some of the values, particularly 0x20Ax, which don't work with the above. Another obvious solution is a lookup table, but without making it unnecessarily large, a lookup table would require some bit rearrangement anyway and I suspect the whole task can be better accomplished with simple bit rearrangement. For the curious, those magic numbers are the only "large" Unicode codepoints that appear in legacy ISO-8859 and Windows codepages.

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  • SLF4J, Common Logging, console output

    - by Mauricio Scheffer
    I have this 3rd party library that has: slf4j-api-1.5.5.jar slf4j-jdk14-1.5.5.jar jcl-over-slf4j-1.5.5.jar I want to write some tests against this library and see its log output, and I don't want to add any more logging libraries (no log4j or anything else). I understand that SLF4J and Common Logging are both logging abstractions so I probably need to write my own simple concrete logger (or maybe not, since jcl-over-slf4j includes org.apache.commons.logging.impl.SimpleLog?). If so, what interfaces should I implement, and more importantly, how do I set up SL4J/Common Logging to use my logger in my test? I read in the SLF4J docs that I have to modify the StaticLoggerBinder class... does that really mean that I actually have to download SLF4J sources, modify the class and recompile it?

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  • Efficient way to copy a collection of Nodes, treat them, and then serialize?

    - by Danjah
    Hi all, I initially thought a regex to remove YUI3 classNames (or whole class attributes) and id attributes from a serialized DOM string was a sound enough approach - but now I'm not sure, given various warnings about using regex on HTML. I'm toying with the idea of making a copy of the DOM structure in question, performing: var nodeStructure = Y.one('#wrap').all('*'); // A YUI3 NodeList // Remove unwanted classNames.. I'd need to maintain a list of them to remove :/ nodeStructure.removeClass('unwantedClassName'); and then: // I believe this can be done on a NodeList collection... nodeStructure.removeAttribute('id'); I'm not quite sure about what I'd need to do to 'copy' a collection of Nodes anyway, as I don't actually want to do the above to my living markup, as its only being saved - not 'closed' or 'exited', a user could continue to change the markup, and then save again. The above doesn't make a copy, I know. Is this efficient? Is there a better way to 'sanitize' my live markup of framework additions to the DOM (and maybe other things too at a later point), before saving it as a string? If it is a good approach, what's a safe way to go about copying my collection of Nodes for safe cleaning? Thanks! d

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  • Part 5, Moving Forum threads from CommunityServer to DotNetNuke

    - by Chris Hammond
    This is the fifth post in a series of blog posts about converting from CommunityServer to DotNetNuke. A brief background: I had a number of websites running on CommunityServer 2.1, I decided it was finally time to ditch CommunityServer due to the change in their licensing model and pricing that made it not good for the small guy. This series of blog posts is about how to convert your CommunityServer based sites to DotNetNuke . Previous Posts: Part 1: An Introduction Part 2: DotNetNuke Installation...(read more)

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  • The SSL Bindings Issue–Web Pro Week 6 of 52

    - by OWScott
    We have a chicken before the egg issue with HTTPS bindings.  This video—week 6 of a 52 week series for the web administrator—covers why HTTPS bindings don’t support host headers the same as HTTP bindings do.  In this video I show the issue and use Wireshark to see it in action. If you haven’t seen the other weeks, you can find past and future videos on the Web Pro Series landing page. The SSL Bindings Issue

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  • Displaying XML data using XSLT transformations in an ASP.Net site

    - by nikolaosk
    In this post, I will try to show you how to display xml data in asp.net website after making some xslt transformations. You will need to know a few things about XSLT. The best place to find out about XSLT is this link . I am going to explain a few things about XSLT elements and functions in this post, anyway. You will see the namespaces we are going to use and some of the main classes and methods.All these come with the FCL (Framework class library) and we just have to know what they do. We will...(read more)

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  • ASP.Net performance counters

    - by nikolaosk
    I was involved in designing and implementing an ASP.Net application some time ago. After we deployed the application we wanted to monitor various aspects of the application. We can use the Performance Monitor. In my windows Server 2008 machine, I go to Start-Run and type " perfmon " and the Performance monitor window pops up. There are thousands of counters in there and it is impossible for anyone to know them all. Most people I know use the Performance Monitor to add counters to monitor SQL Server...(read more)

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  • What could prevent one Amazon EC2 instance from pinging another instance's Private IP?

    - by ks78
    I have multiple Amazon EC2 instances which need to communicate using private IPs. However, so far I've been unable to ping one instance's private IP from another instance. I can ping external addresses, such as their Elastic IPs and other sites (yahoo, google, etc), so it seems there's nothing wrong with the instances' network configuration. Also, they are all in the same zone, so that shouldn't be an issue. Does anyone have any idea what I could be doing wrong? Could this related to the Security Group settings?

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  • Returning "200 OK" in Apache on HTTP OPTIONS requests

    - by i.
    I'm attempting to implement cross-domain HTTP access control without touching any code. I've got my Apache(2) server returning the correct Access Control headers with this block: Header set Access-Control-Allow-Origin "*" Header set Access-Control-Allow-Methods "POST, GET, OPTIONS" I now need to prevent Apache from executing my code when the browser sends a HTTP OPTIONS request (it's stored in the REQUEST_METHOD environment variable), returning 200 OK. How can I configure Apache to respond "200 OK" when the request method is OPTIONS? I've tried this mod_rewrite block, but the Access Control headers are lost. RewriteEngine On RewriteCond %{REQUEST_METHOD} OPTIONS RewriteRule ^(.*)$ $1 [R=200,L]

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  • Server IP Address['s]

    - by Abdul
    hi there i am running server 2003, and seem to have this problem where the server starts kicking out users after a while, especially when they log off, they cant log back in, or the printers on the metwork stop connecting and they cant print to it. when i check the server, i notice that the server has 2 IP addresses, even though it has a static IP, it seems to pick up another IP address as well, but when you go into teh IPV set up, its not there, but of you run the IP scan utility tool, it picks it up. to correct this, i either can log off the server, then log back in, and the IP disappears, or sometimes this doesnt work, and i need to restart the server, but thsi happens like every 2 days or so.....can anyone out there help?

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  • does vmware server needs bare metal or can be installed on an existing OS

    - by Registered User
    I am new to virtual stuff on Vmware sort of environment.I am basically testing Vmware and its various things for our needs.I have a linux 64 bit laptop.I want to know 1) The Vmware server can it be installed in this existing OS or I need to have baremetal installation for this? 2) What is the advantage of using Vmware Server on Vmware workstation ? 3) What is the use of ESX server of vmware? I have seen some alternatives like Xen which one is better Xen or Vmware might be a debatable issue but my questions for Xen are also same I checked Citrix website. 1) I see similar products for Xen What is the advantage of using Xen Server on Xen desktop ?

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  • MyTop doesn't display executed queries

    - by recluze
    Hi, I'm trying to use mytop for figuring out what queries are being executed and how long they take. I can connect properly to the db but MySQL on localhost (5.1.41-3ubuntu12.8) up 0+01:50:47 [09:30:43] Queries: 3.0 qps: 0 Slow: 0.0 Se/In/Up/De(%): 68767/00/00/00 Key Efficiency: 99.1% Bps in/out: 0.0/ 1.2 Id User Host/IP DB Time Cmd Query or State -- ---- ------- -- ---- --- -------------- 225 root localhost 0 Query show full processlist 186 joom localhost culinary 5684 Sleep The number of queries increases over time but the queries themselves do not appear in the list. Is there some type of configuration that I need to do to enable it?

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  • DNS and mod_rewrite not-collaborating

    - by ???? ?????????
    Hello, I have added a CNAME record to my DNS on my CentOS server to redirect subdomain.mydomain.com to another server. I also use mod_rewrite to rewrite mydomain.com to www.mydomain.com: RewriteEngine on RewriteCond %{HTTP_HOST} ^mydomain\.com$ [NC] RewriteRule ^(.*)$ http://www.mydomain.com/$1 [L,R=301] this is placed into .htaccess in the root public html directory Now, the problem is that whenever I lookup subdomain.mydomain.com it redirects me to www.mydomain.com I tried adding another RewriteCond: RewriteEngine on RewriteCond %{HTTP_HOST} ^mydomain\.com$ [NC] RewriteCond %{HTTP_HOST} !^subdomain\.mydomain\.com$ [NC] RewriteRule ^(.*)$ http://www.mydomain.com/$1 [L,R=301] But it didn't help... Anyone has some ideas?

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  • DFSR - What happens when one server gets maxed out?

    - by Jared
    What happens when one server in a DFSR pool maxes out its disk space? I am at the very beginning of my research in DFS/R and this struck me. I plan on implementing this on one server with RAID1 (160GB) and on another server with a RAID5 (500GB). What happens when my 1st server with 160GB disks, run out of space? Will it spill over to the 500GB server? Is it advisable at all to even have the RAID1 server in the DFSR pool? Because the RAID1 server is also my Domain Controller. Hope you guys can help me out here (OS are Win2k3R2)

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  • Crazy problem with Nginx, PHP5-FPM on Ubuntu

    - by Emmanuel
    I've been trying to get a domain from shared hosting to my new VPS. Everything was working just 100% fine, and then all of a sudden rewrites stopped working, pictures that should work started returning 404s. I've got no idea why, but for some reason on my site: http://www.onlythebible.com/ only the home page works, all the other pages depend on rewrites which were working perfectly fine at one stage, but all of a sudden stopped working. Some of the pictures like this url: http://www.onlythebible.com/bgsPreview/Matthew-8.10.jpg which doesn't use a rewrite throws a 404? I almost certain it was nothing to do with the nginx configuration. I've got suspicions that it could be something to do with php5-fpm? The funny thing is, all of a sudden it started working again. And then an hour or so later it broke again and has now gone back to only displaying the home-page and all of the links (and some of the pictures) are just showing 404s. Does anyone have an idea of what the problem might be? I'm pretty new to the whole Linux VPS thing, but this just seems very strange. *edit Here's a line from the error log which might shed some light on the problem: 2011/02/06 03:04:59 [error] 2873#0: *220 open() "/usr/local/nginx/html/bgsPreview/Matthew-8.10.jpg" failed (2: No such file or directory), client: 114.77.115.211, server: onlythebible.com, request: "GET /bgsPreview/Matthew-8.10.jpg HTTP/1.1", host: "www.onlythebible.com", referrer: "http://www.onlythebible.com/" I wonder why it's trying to find the file in /usr/local/nginx/html instead of the proper root which is /var/www/ etc... Oh, and for some reason it's just started working again... for how long I don't know. Another thing that was a bit weird, is that the pages on my website are pulled from a database. But when I edited the database, the pages didn't change... It's almost like they've been cached or something.

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  • What's the largest message size modern email systems generally support?

    - by Phil Hollenback
    I know that Yahoo and Google mail support 25MB email attachments. I have an idea from somewhere that 10MB email messages are generally supported by modern email systems. So if I'm sending an email between two arbitrary users on the internet, what's the safe upper bound on message size? 1MB? 10MB? 25MB? I know that one answer is 'don't send big emails, use some sort of drop box'. I'm looking for a guideline if you are limited to only using regular smtp email.

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  • How to manipulate default document with rewrite module on IIS7?

    - by eugeneK
    Until few month ago i've been using IIS 6 where i could add different Default Documents to each websites which are physically same directory. Since II7 which adds Default Document value to web config i couldn't use such technique as web.config was changed for all the directory. So I've found simple solution with rewrite module to change Default Document for each domain <defaultDocument enabled="false" /> <rewrite> <rewriteMaps> <rewriteMap name="ResolveDefaultDocForHost"> <add key="site1.com" value="Default1.aspx" /> <add key="site2.com" value="Default2.aspx" /> </rewriteMap> </rewriteMaps> <rules> <rule name="DefaultDoc Redirect If No Trailing Slash" stopProcessing="true"> <match url=".*[^/]$" /> <conditions> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" /> </conditions> <action type="Redirect" url="{R:0}/" /> </rule> <rule name="PerHostDefaultDocSlash" stopProcessing="true"> <match url="$|.*/$" /> <conditions> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" /> <add input="{ResolveDefaultDocForHost:{HTTP_HOST}}" pattern="(.+)" /> </conditions> <action type="Rewrite" url="{R:0}{C:1}" appendQueryString="true" /> </rule> </rules> </rewrite> Now i've got two other issues. first of all i can't use canonical url rewrite, if i set one then site1.com and site2.com redirected to www.site1.com instead of having www. for each. second problem is that there is a directory within site1' and site2' physical directory called members in which Default.aspx is always a Default Document doesn't matter which domain name was used. It doesn't work as well. Please help me with this issue because i've never thought i will get such problem with supposed to be better IIS7...

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  • slow query logging in mysql server

    - by Vinayak Mahadevan
    Hi I have installed MySQL Community Edition 5.1.41 on a windows 2000 server. In my.ini file I have enabled slow query logging and have redirected the output to a table.I have set the long_query_time to 10 seconds. Then after running some queries I checked up the slow query log table and found that all the queries which were executed have been logged and a file called database-slow.log has also been created in the data folder. Can anybody please tell me where I am going wrong. I am using the inbuilt innodb and not activated the innodb plugin. Thanks

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  • How do I configure an interface to have *both* a DHCP address and a static address in Ubuntu?

    - by Paul Hoffman
    In a lab setup, I want eth0 on a Ubuntu server box to get a DHCP address for talking to the outside world, and I also want to assign it a static 10.x.y.z address for talking to other boxes on the local network that have 10.x.y.z addresses. I want to do this by editing /etc/network/interfaces. The man page for /etc/network/interfaces is modeled after "here's a bunch of examples, I hope you can figure out the actual rules on your own". I don't see a way to give one interface two addresses using two different methods (static and dhcp), and initial fumbling didn't produce useful results.

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  • Copy File Contiguously to Disk from OSX/Unix/Linux to FAT32 FS?

    - by alharaka
    So the Sysinternals guys have that cool contig.exe utility that allows me ensure a file is contiguous. I need to copy overs ISO files to a FAT32 USB flash key. Grub4DOS requires the files be continuous, but I do not have Windows access at the moment. Is there a way to copy a file so it is contiguous on the target drive, or a tool like the aforementioned that will make an existing file contiguous. Again, I need it on FAT32, and there lies the rub.

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  • Mercurial hgwebdir configuration URL

    - by Jonathan Sternberg
    I'm setting up an hgwebdir configuration for the first time with Mercurial on apache2. I can see the three repositories I've set up in the first page, and I've figured out how to modify their names so they don't resemble the directory path. But when I click to go to one of the repositories, the URL becomes http://localhost/hg/hgweb.cgi/path/to/repos. I would like the directory to be http://localhost/hg/name instead as that is easier to remember for people who want to clone the repository. Is there anyway to do that with hgwebdir?

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  • Ironport X-Junk header.

    - by Kyle
    My school uses Ironport for filtering/monitoring web traffic. I have a bit of curiosity as to why it tacks on a x-junk: header onto everything. After going through a few curl tests, I've found no real connection between what is shown on the page and the x-junk: header. here's my curl request: any ideas? Anchorage:~ khotchkiss$ curl -I google.com HTTP/1.1 301 Moved Permanently Location: http://www.google.com/ Content-Type: text/html; charset=UTF-8 Date: Sun, 06 Feb 2011 04:37:25 GMT Expires: Tue, 08 Mar 2011 04:37:25 GMT Cache-Control: public, max-age=2592000 Server: gws X-XSS-Protection: 1; mode=block Content-Length: 219 Age: 108 Via: 1.1 MC-IRONPORT.UNIVERSITY.LIBERTY.EDU:80 (IronPort-WSA/6.3.3-015) Connection: keep-alive X-Junk: xxxxxxxxxxxxxxxxxxxxxxx

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  • .htaccess to deny access to most xml files

    - by CEich
    I recently had a Joomla site hacked, so I'm trying to harden the site a bit. There's a section in the recommended .htaccess that restricts outside access to the xml files that come with extensions. However, it also keeps my sitemap.xml file from being accessed. How do I allow a certain file whiles keeping the rest? here's the default code: <Files ~ "\.xml$"> Order allow,deny Deny from all Satisfy all </Files> and my modification that caused a 500 error: <Files ~ "(?!sitemap)\.xml$"> Order allow,deny Deny from all Satisfy all </Files>

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