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  • Rules for setting hostname [duplicate]

    - by Ilia Rostovtsev
    This question already has an answer here: Hostnames - What are they all about? 5 answers Setting the hostname: FQDN or short name? 6 answers It's thought that for the hostname should be used FQDN. I have a doubts about whether using: host.domain.ltd and domain.ltd for the hostname is the same thing and will be equally correct / acceptable? I'm willing to use domain.ltd for the hostname. Is it alright?

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  • Why don't we store the syntax tree instead of the source code?

    - by Calmarius
    We have a lot of programming languages. Every language is parsed and syntax checked before translated into code so an abstract syntax tree is built. We have this abstract syntax tree, why don't we store this syntax tree instead of the source code (or next to the source code)? By using an AST instead of the source code. Every programmer in a team can serialize this tree to any language, they want (with the appropriate context free grammar) and parse back to AST when they finished. So this would eliminate the debate about the coding style questions (where to put the { and }, where to put whitespace, indentation, etc.) What are the pros and cons of this approach?

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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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  • Propagaging Apache rules Automatically for all folders Beneath Root [closed]

    - by Sam
    Hi folks, my webroot folder /httpdocs folder contains a .htaccess file The first lines look like this: RewriteEngine on RewriteBase / AddDefaultCharset UTF-8 Options +FollowSymLinks -Indexes -ExecCGI # DirectoryIndex index.php /index.php # ServerSignature Off Now, I want all settings that I have set it to, to be propagated automatically to other folders as well. How can I do that? Thanks very much for suggestions.

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  • Configuring iptables rules for HAProxy and others

    - by MLister
    I have the following relevant settings for HAProxy: defaults log global mode http option httplog option dontlognull retries 3 option redispatch maxconn 500 contimeout 5s clitimeout 15s srvtimeout 15s frontend public bind *:80 option http-server-close option http-pretend-keepalive option forwardfor # ACLs ... I have three backends (including a Nginx server) configured in HAProxy, all listening on different ports of 127.0.0.1. And my iptables config is this: *filter # Allows all loopback (lo0) traffic and drop all traffic to 127/8 that doesn't use lo0 -A INPUT -i lo -j ACCEPT -A INPUT -i lo -d 127.0.0.0/8 -j REJECT # Accepts all established inbound connections -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT # Allows all outbound traffic # You can modify this to only allow certain traffic -A OUTPUT -j ACCEPT # Allows HTTP and HTTPS connections from anywhere (the normal ports for websites) -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT # Allows SSH connections # # THE -dport NUMBER IS THE SAME ONE YOU SET UP IN THE SSHD_CONFIG FILE # -A INPUT -p tcp -m state --state NEW --dport 22 -j ACCEPT # Allow ping -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT # log iptables denied calls -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 7 # Reject all other inbound - default deny unless explicitly allowed policy -A INPUT -j REJECT -A FORWARD -j REJECT COMMIT My questions are: Would the above iptables config work with the settings/options in my HAProxy config? I am also runnning a postgres and a redis server on the same machine, what settings do I need to adjust for these two to enable them work with iptables?

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  • Apache Rewrite Rules

    - by Philip
    I have moved my website from a Wiki to Wordpress and in the process, realised that I have broken links to some popular pages on my website. Is it possible to fix this with a rewrite rule? I need the rule to redirect anything beginning with "^/wiki/(.+)$" to "/$1" but also replacing the "_" character used in MediaWiki slugs to "-" used in Wordpress slugs. For example: http://example.com/wiki/An_Example_Page should be pointed to: http://example.com/an-example-page Is it possible to write such a rewrite rule? Edit: It appears that Wordpress doesn't even care if the "/wiki/" part is removed - provided the slug matches, and that seems to be case-insensitive too. So all I need to do is change the "_" characters to "-" in the slugs.

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  • .htaccess rules not working, but the file seems to be loaded

    - by user221877
    I am trying to remove .php at the end of the URL from any page thats loaded. RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.php -f RewriteRule ^(.*)$ $1.php Its running on my own server, which has WHM/cPanel, so I can change settings at the server level, I'm just not really sure what I'm looking for. I found the httpd.conf file, but it said it was auto generated by whm, so I tried looking in whm for the correct settings but it had barely any settings related to htaccess. If I fill htaccess with gibberish it stops the site from loading, which I assume means that the .htaccess file is being loaded, so I'm not sure what the issue is.

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  • iptable rules not blocking

    - by psychok7
    so i am trying to allow ssh access to a certain range of ips (from 192.168.1.1 to 192.168.1.24) and block all the rest but since i am new to iptables i can't seem to figure, i have : iptables -A INPUT -s 192.168.1.0/24 -p udp --dport ssh -j ACCEPT iptables -A INPUT -s 192.168.1.0/24 -p tcp --dport ssh -j ACCEPT iptables -A INPUT -p tcp --dport ssh -j REJECT iptables -A INPUT -p udp --dport ssh -j REJECT but this does not work, with a vm set with 192.168.1.89 i can still access through ssh. can someone help?

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  • IIRF redirect combine rules?

    - by Phill
    I have 3 "rules". One to make sure URLs are lowercase another to include a slash at the end of directories, and a 3rd to force access to index.html pages to be thru the directory instead. The problem w/ how I have it is, sometimes this is causing multiple 301 redirects. I'd really like each rule to apply in turn and then if neccessary redirect once to the final url. For example a url might need to be converted to lowercase and have a slash added. Or may need to be lowecase and change from index.html to a directory. Any ideas how I can do this? Thanks very much. The rules are below: #LOWERCASE URLS For Directories, aspx, html files RedirectRule ^/(.*[A-Z].*(/|\.html|\.aspx))$ /#L$1#E [R=301] #ADD SLASH TO DIRECTORIES #--------------------------------------------- #Perm Redirect If: #Starts w/ Forward Slash #Match Any Characters Except (. or ?) 1 or more times #End w/ someting besides a dot, ?, or slash #If So, Perm Redirect captured piece W/ Slash At End and at front RedirectRule ^/([^.?]+[^.?/])$ /$1/ [I,R=301] #CHANGE INDEX.HTML REQUESTS TO DIRECTORY REQUESTS #--------------------------------------------- RedirectRule ^/(.*)/index\.html$ /$1/ [I,R=301]

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  • Rules engine for spatial and temporal reasoning?

    - by John
    I have an application that receives a number of datums that characterize spatial / temporal processes. It then filters these datums and creates actions which are then sent to processes that perform the actions. Rinse and repeat. At present, I have a collection of custom filters that perform a lot of complicated spatial/temporal calculations. Many times as I discuss my system to individuals in my company, they ask if I'm using a rules engine. I have yet to find a rules engine that is able to reason well temporally and spatially. (Things like When are two entities ever close? Is entity A ever in region B? If entity C is near entity D but oriented backwards relative to C then perform action D.) I have looked at Drools, Cyc, Jess in the past (say 3-4 years ago). It's time to re-examine the state of the art. Any suggestions? Any standards that you know of that support this kind of reasoning? Any defacto standards? Any applications? Thanks!

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  • Excluding a script from the general UrlRewrite rules

    - by Steven
    Hi, I have following rewrite rules for a website: RewriteEngine On # Stop reading config files RewriteCond %{REQUEST_FILENAME} .*/web.config$ [NC,OR] RewriteCond %{REQUEST_FILENAME} .*/\.htaccess$ [NC] RewriteRule ^(.+)$ - [F] # Rewrite to url RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !^(/bilder_losning/|/bilder/|/gfx/|/js/|/css/|/doc/).* RewriteRule ^(.+)$ index.cfm?smartLinkKey=%{REQUEST_URI} [L] Now I have to exclude a script including its eventually querystrings from the above rules, so that I can access and execute it on the normal way, at the moment the whole url is being ignored and forwarded to the index page. I need to have access to the script shoplink.cfm in the root which takes variables tduid and url (shoplink.cfm?tduid=1&url=) I have tried to resolve it using this: # maybe?: RewriteRule !(^/shoplink.cfm [QSA] but to be honest, I have not much of a clue of urlrewriting and have no idea what I am supposed to write. I just know that above will generate a nice 500 error. I have been looking around a lot on stackoverflow and other websites on the same subject, but all I see is people trying to exclude directories, not files. In the worst case I could add the script to a seperate directory and exclude the directory from the rewriterules, but rather not since the script should really remain in the root. Just also tried: RewriteRule ^/shoplink.cfm$ $0 [L] but that didn't do anything either. Anyone who can help me out on this subject? Thanks in advance. Steven Esser ColdFusion programmer

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  • TDD - testing business rules/validation in ASP.NET MVC

    - by csetzkorn
    Hi, I am using the sharp architecture so I can easily use mocks etc. in my unit tests and/or during TDD. I have quite complicated business rules and would like to test them at the controller level. I am just wondering how other people do this? For me validation tests business rules at three levels: (1) Property level (e.g. property is required) (2) Intra property level (e.g. start date < end date) (3) Persistence level (e.g. name is unique, parent cannot be child of child) My validation framework also assigns errors to properties. I am just wondering what other people do? Do you write a test for each business rule and check whether the correct error message is assigned to the correct property (i.e. looking at the ASP.MVC ModelState)? I hope my question makes sense. Thanks a lot! Best wishes, Christian

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  • Multiple SFINAE rules

    - by Fred
    Hi everyone, After reading the answer to this question, I learned that SFINAE can be used to choose between two functions based on whether the class has a certain member function. It's the equivalent of the following, just that each branch in the if statement is split into an overloaded function: template<typename T> void Func(T& arg) { if(HAS_MEMBER_FUNCTION_X(T)) arg.X(); else //Do something else because T doesn't have X() } becomes template<typename T> void Func(T &arg, int_to_type<true>); //T has X() template<typename T> void Func(T &arg, int_to_type<false>); //T does not have X() I was wondering if it was possible to extend SFINAE to do multiple rules. Something that would be the equivalent of this: template<typename T> void Func(T& arg) { if(HAS_MEMBER_FUNCTION_X(T)) //See if T has a member function X arg.X(); else if(POINTER_DERIVED_FROM_CLASS_A(T)) //See if T is a pointer to a class derived from class A arg->A_Function(); else if(DERIVED_FROM_CLASS_B(T)) //See if T derives from class B arg.B_Function(); else if(IS_TEMPLATE_CLASS_C(T)) //See if T is class C<U> where U could be anything arg.C_Function(); else if(IS_POD(T)) //See if T is a POD type //Do something with a POD type else //Do something else because none of the above rules apply } Is something like this possible? Thank you.

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  • Aspect-Oriented Programming in OOP world - breaking rules ?

    - by Maksim Kondratyuk
    Hi 2 all! When I worked on asp.net mvc web site project, I investigated different approaches for validation. Some of them were DataAnotation validation and Validation Block. They use attributes for setting up rules for validation. Like this: [Required] public string Name {get;set;} I was confused how this approach combines with SRP (single responsibilty principle) from OOP world. Also I don't like any business logic in business objects, I prefer "poor business objects" model, but when I decorate my business objects with validation attributes for real requirements, they become ugly (Has a lot of attributes / with localization logic and so on). Idea with attributes realy simple, but in my opinion the validation decoration should be separated from object. I'm not sure is the approach to separate validation rules to xml files or to another objects, maybe it is a solution. Another bad side of AOP - problems with unit testin such code. When I decorated some controller actions with custom attributes for example to import/export TempData between actions or initialize some required services I can't to write proper unit test for testing this actions. Do you think that attributes don't break srp or you just disregard this and think that it's simplest , is not worst way ? P.S. I read some likes articles and discussions and I just want to put things in proper order. P.P.S. sorry for my "fluent" english :=)

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  • How should rules for Aggregate Roots be enforced?

    - by MylesRip
    While searching the web, I came across a list of rules from Eric Evans' book that should be enforced for aggregates: The root Entity has global identity and is ultimately responsible for checking invariants Root Entities have global identity. Entities inside the boundary have local identity, unique only within the Aggregate. Nothing outside the Aggregate boundary can hold a reference to anything inside, except to the root Entity. The root Entity can hand references to the internal Entities to other objects, but they can only use them transiently (within a single method or block). Only Aggregate Roots can be obtained directly with database queries. Everything else must be done through traversal. Objects within the Aggregate can hold references to other Aggregate roots. A delete operation must remove everything within the Aggregate boundary all at once When a change to any object within the Aggregate boundary is committed, all invariants of the whole Aggregate must be satisfied. This all seems fine in theory, but I don't see how these rules would be enforced in the real world. Take rule 3 for example. Once the root entity has given an exteral object a reference to an internal entity, what's to keep that external object from holding on to the reference beyond the single method or block? (If the enforcement of this is platform-specific, I would be interested in knowing how this would be enforced within a C#/.NET/NHibernate environment.)

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  • Code promotion: Enforcing the rules

    - by jbarker7
    So here is our problem: We have a small team of developers with their own ways of doing things-- I am trying to formalize a process in which we are required to promote our code in the following order: Local sandbox Dev UAT Staging Live Developers develop/test as they go on their own sandbox, Dev is its own box that we would use for continuous integration, UAT is another site in IIS on the dev box, which uses our dev database. We then promote to staging, which is a site in IIS on the Live box and using live data (just like the live, hence staging). Then, finally, we promote to live. Here are a few of my questions: 1.) Does this seem to be best practice? If not, what needs to be done differently? 2.) How do I enforce the rules to the developers? Often developers skip steps in order to save time... this should not be tolerated and would be great if it could be physically enforced. 3.) How do I enforce these rules to the business group? The business group just wants to get features out FAST. Do we promote only on certain days? Thanks! Josh

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  • INNER JOIN syntax for mySQL using phpmyadmin

    - by David van Dugteren
    SELECT Question.userid, user.uid FROM `question` WHERE NOT `userid`=2 LIMIT 0, 60 INNER JOIN `user` ON `question`.userid=`user`.uid ORDER BY `question`.userid returns Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INNER JOIN User ON question.userid=user.uid ORDER BY question.userid' at line 5 Can't for the life of me figure out what I'm doing wrong here.

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  • UITextView w/ Syntax Highlighting

    - by Travis
    Is there a common library, parser, etc. for Cocoa or Cocoa-Touch that can take a chunk of text and do the proper syntax highlighting? As a simple example, I'd like to have a UITextView that has C/C++ syntax highlighting.

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  • How to use the AAA syntax to do an AssertWasCalled but ignore arguments

    - by Toran Billups
    I'm using the new AAA syntax and wanted to know the syntax to do the below and have the mock ignore the agruments. mockAccount.AssertWasCalled(account = account.SetPassword("dsfdslkj")); I think the below is how I would do this with the record/ replay model but I wanted to see if this could be done with AAA using 3.6 mockAccount.Expect(account = account.SetPassword("sdfdsf")).IgnoreArguments(); mockAccount.VerifyAllExpectations(); Thank you in advance

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  • Getting syntax errors when building with python 3.1 and not with python 2.6

    - by mathan
    Hi All, Using Mac os X 10.6, python 3.1 and gcc 4.0 trying to build pyfsevent implemented in python2.6 by converting it to python 3.1. Wondering when getting the following errors while building in python 3.1 alone. Why not when building with python 2.6? error: syntax error before ‘CFFileDescriptorRef’ warning: no semicolon at end of struct or union error: syntax error before ‘}’ token warning: data definition has no type or storage clas

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  • Capitalization of Person names in programming

    - by Albert
    Hey all, Is anyone aware of some code/rules on how to capitalize the names of people correctly? John Smith Johan van Rensburg Derrick von Gogh Ruby de La Fuente Peter Maclaurin Garry McDonald (these may not be correct, just some sample names and how the capitalization could be/work) This seems like a losing battle... If anyone has some code or rules on when and how to capitalize names, let me know :) Cheers, Albert

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  • Sqlite table constraint - unique on multiple columns

    - by Rich
    I can find syntax "charts" on this on the sqlite website, but no examples and my code is crashing. I have other tables with unique constraints on a single column, but I want to add a constraint to the table on two columns. This is what I have that is causing a SQLiteException with the message "syntax error". CREATE TABLE name (column defs) UNIQUE (col_name1, col_name2) ON CONFLICT REPLACE I'm doing this based on the following: table-constraint

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  • perl + export param in to perl syntax in shell script

    - by yael
    hi I have the following script that replace a param to b param and match only the c parameter in line how to change the perl syntax: "if /$c/" in order to export c param to the follwoing perl syntax !/bin/bash export a='@d&' export b='new text' export c='bla bla' echo $c | perl -pe 'next if /^#/; s/(^|\s)\Q$ENV{a}\E(\s|$)/$1$ENV{b}$2/ if /$c/'

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