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• WCF Vs Web Services

  - by Ben

  Hi, I am about to re-release my website that i have transformed into a SilverLight Site, and was wondering if it is worth while updating the web service that it hosts into a WCF Service. The Service doesn't do too much at the moment, but i will be growing it fairly substantially. I have read a few articles on the differences between asmx web services and WCF Services and can't really see the benefits of WCF, but i am probably very wrong. Could anyone advise of the advantages of WCF and if is worth while me making the move (on the basis that you know it's a small service at the moment, but will be growing). Thanks

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• SphinxSearch or a spider - which one to choose?

  - by r2b2

  Hello, here is my problem: We own SiteA and SiteB and they share the same server and database where we have full control. SiteC , siteD and siteE are some of the sites we own as well but reside on a different web hosts. The goal is to create a unified search functionality for all of the sites mentioned above. That is if somebody search for a term in SiteA, the search result will automatically come up with results from SiteB,SiteC,SiteD and Site E too. The search results should be shown under the website they were found in. All these websites content are stored in their own databases. If I use SphinxSearch to index the above sites,I would then require those sites that we dont have complete control with to setup a web service where i can download a database dump or csv file for indexing. Im not quite sure about how a sphider will come into play here so need your opinion. Sphinx or a spider? THanks!

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• MVVM Madness: Commands

  - by JP

  I like MVVM. I don't love it, but like it. Most of it makes sense. But, I keep reading articles that encourage you to write a lot of code so that you can write XAML and don't have to write any code in the code-behind. Let me give you an example. Recently I wanted to hookup a command in my ViewModel to a ListView MouseDoubleClickEvent. I wasn't quite sure how to do this. Fortunately, Google has answers for everything. I found the following articles: http://blog.functionalfun.net/2008/09/hooking-up-commands-to-events-in-wpf.html http://joyfulwpf.blogspot.com/2009/05/mvvm-invoking-command-on-attached-event.html http://sachabarber.net/?p=514 http://geekswithblogs.net/HouseOfBilz/archive/2009/08/27/adventures-in-mvvm-ndash-binding-commands-to-any-event.aspx http://marlongrech.wordpress.com/2008/12/13/attachedcommandbehavior-v2-aka-acb/ While the solutions were helpful in my understanding of commands, there were problems. Some of the aforementioned solutions rendered the WPF designer unusable because of a common hack of appending "Internal" after a dependency property; the WPF designer can't find it, but the CLR can. Some of the solutions didn't allow multiple commands to the same control. Some of the solutions didn't allow parameters. After experimenting for a few hours I just decided to do this: private void ListView_MouseDoubleClick(object sender, MouseButtonEventArgs e) { ListView lv = sender as ListView; MyViewModel vm = this.DataContext as MyViewModel; vm.DoSomethingCommand.Execute(lv.SelectedItem); } So, MVVM purists, please tell me what's wrong with this? I can still Unit test my command. This seems very practical, but seems to violate the guideline of "ZOMG... you have code in your code-behind!!!!" Please share your thoughts. Thanks in advance.

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• Apache Config with Wildcard/Non-Wildcard Subdomain Mix

  - by SoupNutsy

  I have the domain, we'll call it "mydomain.com" and I want the following virtual hosts set up to resolve in the following way: mydomain.com / www.mydomain.com to point to /var/www/ dev.mydomain.com to point to /var/www/dev/ *.mydomain.com (all other subdomains) to point to /var/www/old My apache configuration is currently set up as: NameVirtualHost 1.2.3.4:80 <VirtualHost 1.2.3.4:80> ServerAlias *.mydomain.com DocumentRoot /var/www/old </VirtualHost> <VirtualHost 1.2.3.4:80> ServerName mydomain.com ServerAlias www.mydomain.com DocumentRoot /var/www </VirtualHost> <VirtualHost 1.2.3.4:80> ServerAlias dev.mydomain.com DocumentRoot /var/www/dev </VirtualHost> Unfortunately, this is not working as I expected. With this configuration, only the first (wildcard) VirtualHost entry works properly. What is the right way to configure Apache to do this?

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• Troubleshoot Page Loading Issue (ActiveX control)

  - by Spence

  Apologies for cryptic title, I'm hoping most people will read this BEFORE trying to move it to server fault. I might try and discourage the "too hard basket, move it to server fault anyway" crowd as well :). I have a page which will open cleanly when it's opened in it's own browser window/tab. The exact same URL, when loaded as part of a frame in a page in the same (local intranet) security zone shows the error: Your security settins do not allow websites to use ActiveX controls installed on your computer. This page may not display correctly. Click Here for options. How do I troubleshoot IE to work out which ActiveX control won't load in the frame but does load if the page is opened directly? Please note that I have dropped the security fully AND I've also moved EVERY setting in IE to enable or allow and restarted the browser but I STILL get the same issue. The two sites are on different machines in the same domain. I can't access website source code but I can ask for it to be fixed, so I'd really appreciate some help on this.

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• Store comparison in variable (or execute comparison when it's given as an string)

  - by BorrajaX

  Hello everyone. I'd like to know if the super-powerful python allows to store a comparison in a variable or, if not, if it's possible calling/executing a comparison when given as an string ("==" or "!=") I want to allow the users of my program the chance of giving a comparison in an string. For instance, let's say I have a list of... "products" and the user wants to select the products whose manufacturer is "foo". He could would input something like: Product.manufacturer == "foo" and if the user wants the products whose manufacturer is not "bar" he would input Product.manufacturer != "bar" If the user inputs that line as an string, I create a tree with an structure like: != / \ manufacturer bar I'd like to allow that comparison to run properly, but I don't know how to make it happen if != is an string. The "manufacturer" field is a property, so I can properly get it from the Product class and store it (as a property) in the leaf, and well... "bar" is just an string. I'd like to know if I can something similar to what I do with "manufacturer": storing it with a 'callable" (kind of) thing: the property with the comparator: != I have tried with "eval" and it may work, but the comparisons are going to be actually used to query a MySQL database (using sqlalchemy) and I'm a bit concerned about the security of that... Any idea will be deeply appreciated. Thank you! PS: The idea of all this is being able to generate a sqlalchemy query, so if the user inputs the string: Product.manufacturer != "foo" || Product.manufacturer != "bar" ... my tree thing can generate the following: sqlalchemy.or_(Product.manufacturer !="foo", Product.manufacturer !="bar") Since sqlalchemy.or_ is callable, I can also store it in one of the leaves... I only see a problem with the "!="

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• Counting and joining two tables

  - by Eikern

  Eventhosts – containing the three regular hosts and an "other" field (if someone is replacing them) eventid | host (SET[Steve,Tim,Brian,other]) ------------------------------------------- 1 | Steve 2 | Tim 3 | Brian 4 | other 5 | other Event id | other | name etc. ---------------------- 1 | | … 2 | | … 3 | | … 4 | Billy | … 5 | Irwin | … This query: SELECT h.host, COUNT(*) AS hostcount FROM host AS h LEFT OUTER JOIN event AS e ON h.eventid = e.id GROUP BY h.host Returns Steve | 1 Tim | 1 Brian | 1 other | 2 I want it to return Steve | 1 Tim | 1 Brian | 1 Billy | 1 Irwin | 1 OR Steve | | 1 Tim | | 1 Brian | | 1 other | Billy | 1 other | Irwin | 1 Can someone tell me how I can achieve this or point me in a direction?

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• Silverlight and clientaccesspolicy.xml

  - by JerA

  I have a silverlight app hosted on "dev.system-engine.com" which creates an tcp connection connecting to "dev.system-engine.com" the silverlight app and the policy file are on the "dev.system-engine.com" webserver. "system-engine.com" and "dev.system-engine.com" are separate servers. I cannot seem to get it to work. I have been struggling with the policyfile. <?xml version="1.0" encoding="utf-8" ?> <access-policy> <cross-domain-access> <policy> <allow-from> <domain uri="http://dev.system-engine.com:80"/> </allow-from> <grant-to> <domain uri="http://dev.system-engine.com:80"/> <socket-resource port="80" protocol="tcp"/> <resource path="/" include-subpaths="true"/> </grant-to> </policy>

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• IIS 7 can't connect to SQLServer 2008

  - by Nicolas Cadilhac

  Sorry if this is the most seen question on the web, but this is my turn. I am trying to publish my asp.net mvc app on IIS 7 under MS Sql Server 2008. I am on a Windows Server 2008 virtual machine. I get the following classical error: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) Under SQLServer, Allow remote connections is checked. My connection string is: Data Source=.\MSSQLSERVER;Initial Catalog=mydbname;User Id=sa;Password=mypassword I also tried with no username/password and "Integrated Security=true". There is only one instance of SQLServer installed. I tried to access my web page locally and remotely. There is no active firewall on the virtual machine. Thx for your help.

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• mod_wsgi for multiple trac projects [Windows]

  - by fampinheiro

  Hello, I have a system with windows server 2008, Apache httpd 2.2 and trac 0.11 i'm using mod_wsgi so the apache server do the web server job. Integration with Trac after read this site i found that the most suitable solution was the following (i have in my httpd.conf the line Include conf/extra/httpd-trac.conf) httpd-trac.conf LoadModule wsgi_module modules/mod_wsgi.so WSGIDaemonProcess tracs processes=3 threads=25 maximum-requests=1000 RewriteEngine On RewriteCond %{REQUEST_URI} ^/trac/([^/]+) RewriteCond c:\Project\Services\Trac\%1\conf\trac.ini !-f RewriteRule . - [F] RewriteCond %{REQUEST_URI} ^/trac/([^/]+) RewriteRule . - [E=trac.env_path:c:\Project\Services\Trac\%1] WSGIScriptAliasMatch ^/trac/([^/]+) c:\Project\Trac\trac.wsgi <Directory c:\Project\Trac> WSGIProcessGroup tracs WSGIApplicationGroup %{GLOBAL} Order deny,allow Allow from all </Directory> the problem i encouter is the following: C:\Project\Apache\binhttpd.exe -k start Syntax error on line 3 of C:/Project/Apache/conf/extra/httpd-trac.conf: Invalid command 'WSGIDaemonProcess', perhaps misspelled or defined by a module not included in the server configuration The objective: My objective is to have multiple trac projects with diferente authentication information. If you have other solution than this please tell me =) Thank you for your help.

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• "port forwarding": redirect calls to webservice at port 8081 to port 80

  - by niba

  Hi, a colleague of mine wrote a webservice that runs on port 8081 of our Windows 2008 Server. He uses the class ServiceHost, afaik this means its a standalone host (no IIS or ASP involvement). Note: I'm new into WCF ;) Now there are some issues with clients behind a firewall blocking the requests to remote port 8081 of our server (where the webservice runs). The easiest solution would be: run the webservice host at port 80 ... But: there is also a Apache 2.2 webserver running on the Windows Server, hosting some websites. By default it runs on port 80. My solution after some researching: use a virtual host to route requests to a virtual host (lets say http://webservice.[hostname]:80) to the webservice host (http://[hostname]:8081). Is this a good idea? Can Apache handle forwards to standalone webservice hosts? It would be nice if someone could lead me on to the right track :) Best regards, Niels

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• LINQ-to-SQL: How can I prevent 'objects you are adding to the designer use a different data connecti

  - by Timothy Khouri

  I am using Visual Studio 2010, and I have a LINQ-to-SQL DBML file that my colleagues and I are using for this project. We have a connection string in the web.config file that the DBML is using. However, when I drag a new table from my "Server Explorer" onto the DBML file... I get presented with a dialog that demands that do one of these two options: Allow visual studio to change the connection string to match the one in my solution explorer. Cancel the operation (meaning, I don't get my table). I don't really care too much about the debate as why the PMs/devs who made this tool didn't allow a third option - "Create the object anyway - don't worry, I'm a developer!" What I am thinking would be a good solution is if I can create a connection in the Server Explorer - WITHOUT A WIZARD. If I can just paste a connection string, that would be awesome! Because then the DBML designer won't freak out on me :O) If anyone knows the answer to this question, or how to do the above, please lemme know!

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• Linq, Left Join and Dates...

  - by BitFiddler

  So my situation is that I have a linq-to-sql model that does not allow dates to be null in one of my tables. This is intended, because the database does not allow nulls in that field. My problem, is that when I try to write a Linq query with this model, I cannot do a left join with that table anymore because the date is not a 'nullable' field and so I can't compare it to "Nothing". Example: There is a Movie table, {ID,MovieTitle}, and a Showings table, {ID,MovieID,ShowingTime,Location} Now I am trying to write a statement that will return all those movies that have no showings. In T.SQL this would look like: Select m.* From Movies m Left Join Showings s On m.ID = s.MovieID Where s.ShowingTime is Null Now in this situation I could test for Null on the 'Location' field but this is not what I have in reality (just a simplified example). All I have are non-null dates. I am trying to write in Linq: From m In dbContext.Movies _ Group Join s In Showings on m.ID Equals s.MovieID into MovieShowings = Group _ From ms In MovieShowings.DefaultIfEmpty _ Where ms.ShowingTime is Nothing _ Select ms However I am getting an error saying 'Is' operator does not accept operands of type 'Date'. Operands must be reference or nullable types. Is there any way around this? The model is correct, there should never be a null in the Showings:ShowTime table. But if you do a left join, and there are no show times for a particular movie, then ShowTime SHOULD be Nothing for that movie... Thanks everyone for your help.

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• Using Tweet# to pull 5 most recent updates from a user

  - by Richard West

  I am working on a method that will allow me to pull in the 5 most recent posts that my company has made on it's Twitter account. One requirement of this web application is that it present these twitter posts as "regular" html in our website, so using the Twitter javascript method is ruled out. I have found Tweet#, a C# plugin that exposes the Twitter commands. This seems to be a nice way to pull this information but I have a question. I would like to be able to pull these updates from Twitter without authenticating to Twitter. Since the information is publically available I would think this would be fairly simple, however I'm having a problem with Tweet# wanting to do this. The cloest I have found to be able to do this requires my to login/authenticate with Twitter and then pull the 5 most recent tweets. Like this: var twitter = FluentTwitter.CreateRequest() .AuthenticateAs("UserName", "p@ssw0rd") .Configuration.CacheForInactivityOf(60.Seconds()) .Statuses().OnUserTimeline().Take(5).AsJson(); What I need is something that will allow my to specific the user id to pull the most recent 5 tweets from without authentication.

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• Yahoo flagging mail as spam when using relay server

  - by modulaaron

  I'm using Postfix to relay mail from my site to my mail server. Mail is received properly at my Gmail and Hotmail accounts - only Yahoo is the problem. The Yahoo mail headers state: Received-SPF: none (mta1133.mail.mud.yahoo.com: domain of [email protected] does not designate permitted sender hosts) In contrast, the Gmail headers state: Received-SPF: pass (google.com: domain of [email protected] designates 74.50.xxx.xxx as permitted sender) client-ip=74.50.xxx.xxx; Reverse DNS is set up correctly, as is my SPF record. Does anyone have any suggestions as to what I can do to solve the Yahoo problem (short of contacting Yahoo, as this is a brand new mail server)? FYI - I just set up domainkeys, but I'm not sure whether they should be on the origin or relay server. Thanks

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• php symfony and apache2 - inst't serving .phtml

  - by pmoniq

  Hi, I have a problem with apache2 settings (Ubuntu system). I would like to run symfony project on my localhost but instead of serving .phtml files, browser is trying to download files. this is my file .host: 127.0.0.3 test this is apache2/sites-available/default file < VirtualHost 127.0.0.3:80 ServerName test DocumentRoot "/home/m/Pr/workspace/php/test/web" DirectoryIndex frontend_dev.php < Directory "/home/m/Pr/workspace/php/test/web" AllowOverride All Allow from All Alias /sf /home/m/Pr/workspace/php/test/lib/vendor/symfony/data/web/sf < Directory "/home/m/Pr/workspace/php/test/lib/vendor/symfony/data/web/sf" AllowOverride All Allow from All </Directory> and this is .htaccess in /test RewriteEngine On RewriteRule ^(.*)$ /web/$1 Options +FollowSymLinks +ExecCGI AddHandler application/x-httpd-php5 .php .phtml and this is .htaccess in /test/web Options +FollowSymLinks +ExecCGI RewriteEngine On # uncomment the following line, if you are having trouble # getting no_script_name to work RewriteBase / # we skip all files with .something #RewriteCond %{REQUEST_URI} ..+$ #RewriteCond %{REQUEST_URI} !.html$ #RewriteRule .* - [L] # we check if the .html version is here (caching) RewriteRule ^$ index.html [QSA] RewriteRule ^([^.]+)$ $1.html [QSA] RewriteCond %{REQUEST_FILENAME} !-f # no, so we redirect to our front web controller RewriteRule ^(.*)$ index.php [QSA,L] Another problem is I think apache don't read .htaccess files. What am i doing wrong? Maybe I forgot about something? Please, help me becouse i have no idea.

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• Some questions about slugs in ASP.NET MVC content system

  - by mare

  In my application I'm currently using forms which allow to enter Title and Slug fields. Now I've been struggling with the slugs thing for a while because I can never decide once and for all how to handle them. 1) Make Title and Slug indenpendent Should I allow users to enter both Title and Slug separetely? This is what I had first. I also had an option that if user did not enter the Slug it was derived from the Title. If both were enter, the Slug field took precedence. 2) Derive Slug from Title, when content is inserted that's it for the Slug, no more changes Then, I switched to only Title field and derive Slug from title. While doing it I found out that now I have to change all the forms that allowed user to enter a slug. This way of doing it also prevents users to change Slugs - they can change the Title but it has no effect on the Slug. You can think of it like Slug is uniqued ID. 3) Now I'm thinking again of allowing users to change slug Though I don't think it is all that useful. How many times does the content that someone already added, spent time on writing it, even require a change of either Title or slug? I don't think it is that many times. The biggest problem with the 3rd option is that If I use Slugs as IDs, I need to update the reference all over the place when Slug changes. Or maintain a table that would contain somekind of Slug history. What are you thoughts on these, I hope, valid questions?

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• Dynamic State Machine in Ruby? Do State Machines Have to be Classes?

  - by viatropos

  Question is, are state machines always defined statically (on classes)? Or is there a way for me to have it so each instance of the class with has it's own set of states? I'm checking out Stonepath for implementing a Task Engine. I don't really see the distinction between "states" and "tasks" in there, so I'm thinking I could just map a Task directly to a state. This would allow me to be able to define task-lists (or workflows) dynamically, without having to do things like: aasm_event :evaluate do transitions :to => :in_evaluation, :from => :pending end aasm_event :accept do transitions :to => :accepted, :from => :pending end aasm_event :reject do transitions :to => :rejected, :from => :pending end Instead, a WorkItem (the main workflow/task manager model), would just have many tasks. Then the tasks would work like states, so I could do something like this: aasm_initial_state :initial tasks.each do |task| aasm_state task.name.to_sym end previous_state = nil tasks.each do |tasks| aasm_event task.name.to_sym do transitions :to => "#{task.name}_phase".to_sym, :from => previous_state ? "#{task.name}_phase" : "initial" end previous_state = state end However, I can't do that with the aasm gem because those methods (aasm_state and aasm_event) are class methods, so every instance of the class with that state machine has the same states. I want it so a "WorkItem" or "TaskList" dynmically creates a sequence of states and transitions based on the tasks it has. This would allow me to dynamically define workflows and just have states map to tasks. Are state machines ever used like this?

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• Can't find my.cnf file so I can enable InnoDB - is there another way?

  - by Jared

  Hey all, I am trying to Magento running on a share server, and am having difficulty. When I look at the engines in PHPmyAdmin, I get InnoDB DISABLED. So I look in /etc/, and there is no my.cnf file. There is a ftpquota and a .boxtrapper file, but nothing else. I know I can probably create a new one, but this is a server that hosts a lot of sites. I'm afraid I will mess someone up. So is there a way to maybe create a my.cnf file that only enable InnoDB and doesn't effect anything else? Or is there another way to enable it?

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• How can I create a hybrid Silverlight and aspx application

  - by PilotBob

  Here is my scenerio.. We have an ASP.Net 2.x web site. We want to migrate it to Silverlight full frame application. However, there is no way we can go away in a corner and redo every web page in SL right off the bat. What I would like to do is build the chrome of the app (main page, dashboard, login, common system/config screens, main menu) in SL and be able to open existing .aspx pages in the main content SL frame. From what I see there is no way to do this. I thought the Webbrowser control in SL4 would be the answer, but apparently that only works if your app is run out of browser. So, what is my best recourse? It seems like I will have to create some type of .aspx page that hosts the .XAP and pass in the page I want it to load? How would you gurus approach this?

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• PHP Parse error: syntax error, unexpected T_STRING, expecting T_FUNCTION

  - by Douglas Santos Pinto

  PHP Parse error: syntax error, unexpected T_STRING, expecting T_FUNCTION in C:\Inetpub\wwwroot\webroot\www.novotempo.org.br\lib\Twitter.php on line 54 Hi, I´m Douglas from Brazil, and this above is my problem. The line is just a DEFINE.... this one : define('DEBUG',false); Searching the net I found that this usually occurs when you´re using PHP 4.xx, but I´m using 5.2.6 (Just saw it using phpinfo()) I tryed locally, and in two other external hosts, but it keeps returning the same msg. Anyone can help? Tanx! Doug

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• REST tools support for development and testing

  - by nzpcmad

  There is a similar question here but it only covers some of the issues below. We have a client who requires web services using REST. We have tons of experience using SOAP and over time have gathered together a really good set of tools for SOAP development and testing e.g. soapUI Eclipse plugins wsdl2java WSStudio By "tools" I mean a product "out of the box" that we can start using. I'm not talking about cutting code to "roll our own" using Ajax or whatever. The tool set for REST doesn't seem to be nearly as mature? What tools are out there (we use C# and Java mainly) ? Do the tools handle GET, POST, PUT, and DELETE? Is there a decent Eclipse plugin? Is there a decent client testing application like WSStudio where you point the tool to the WSDL and it generates a proxy on the fly with the appropriate methods and inputs and you simple type the data in? Are there any good package monitoring tools that allow you to look at the data? (I'm not thinking about sniffers like Wireshark here but rather things like soapUI that allow you to see the request / response) ?

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• Transition domain to new web host without waiting for DNS propagation

  - by jcmoney

  I was considering switching to Amazon EC2 to host my website to handle more traffic. It seems like I would have to update DNS records to point to the new server but I was wondering if there was a way to avoid having to wait for the new DNS record to propagate. Putting the code on both hosts would not work for me since the app writes to a database pretty frequently. I thought about just using a meta redirect or php redirect on the old host to redirect to the new host ip but was wondering if there's a better more accepted way of doing this.

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• Best method of achieving bi-directional communication between Apple iPad "clients" and a Windows Ser

  - by user361910

  We are currently starting to build a client-server system which will see 10 or more Apple iPad client devices communicating to a central Windows server over a wireless LAN. We wanted to some existing plumbing (.NET remoting/WCF/web services/etc) that would allow us to implement a reliable, secure solution without having to start at a low level (e.g. sockets) and recreate the wheel. One of the major requirements that complicates this scenario is that unlike a traditional web service, the windows server needs to be able to arbitrarily notify the clients whenever certain events occur -- so it is not a simple request/response scenario like the web. Initially, we were going to use Windows clients, so our plan was to use the full-duplex mode of .NET WCF over HTTP|TCP. But now using the iPad, we don't have any of the WCF infrastructure. So my question is: what is the best way to allow an iPad and a Windows server to (securely) communicate over a LAN, with each device able to initiate communication to the other? Am I stuck writing low-level socket code? Thanks!

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• Possible to create an implicit cast for an anonymous type to a dictionary?

  - by Ralph

  I wrote a method like this: using AttrDict = System.Collections.Generic.Dictionary<string, object>; using IAttrDict = System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<string, object>>; static string HtmlTag(string tagName, string content = null, IAttrDict attrs = null) { var sb = new StringBuilder("<"); sb.Append(tagName); if(attrs != null) foreach (var attr in attrs) sb.AppendFormat(" {0}=\"{1}\"", attr.Key, attr.Value.ToString().EscapeQuotes()); if (content != null) sb.AppendFormat(">{0}</{1}>", content, tagName); else sb.Append(" />"); return sb.ToString(); } Which you can call like HtmlTag("div", "hello world", new AttrDict{{"class","green"}}); Not too bad. But what if I wanted to allow users to pass an anonymous type in place of the dict? Like HtmlTag("div", "hello world", new {@class="green"}); Even better! I could write the overload easily, but the problem is I'm going to have about 50 functions like this, I don't want to overload each one of them. I was hoping I could just write an implicit cast to do the work for me... public class AttrDict : Dictionary<string, object> { public static implicit operator AttrDict(object obj) { // conversion from anonymous type to AttrDict here } } But C# simply won't allow it: user-defined conversions to or from a base class are not allowed So what can I do?

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