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• Fetching Controller Name on Model in rails

  - by user351853

  Hi, How to fetch the controller name on model in Rails?

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• How to rotate a group of objects around a common center?

  - by user1662292

  I've made a model in 3D Studio Max 9. It consists of a variety of cubes, clyinders etc. In XNA I've imported the model okay and it shows correctly. However, when I apply rotation, each component in the model rotates around it's own centre. I want the model to rotate as a single unit. I've linked the components in 3D Max and they rotate as I want in Max. protected override void LoadContent() { spriteBatch = new SpriteBatch(GraphicsDevice); model = Content.Load<Model>("Models/Alien1"); } protected override void Update(GameTime gameTime) { camera.Update(1f, new Vector3(), graphics.GraphicsDevice.Viewport.AspectRatio); rotation += 0.1f; base.Update(gameTime); } protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); Matrix[] transforms = new Matrix[model.Bones.Count]; model.CopyAbsoluteBoneTransformsTo(transforms); Matrix worldMatrix = Matrix.Identity; Matrix rotationYMatrix = Matrix.CreateRotationY(rotation); Matrix translateMatrix = Matrix.CreateTranslation(location); worldMatrix = rotationYMatrix * translateMatrix; foreach (ModelMesh mesh in model.Meshes) { foreach (BasicEffect effect in mesh.Effects) { effect.World = worldMatrix * transforms[mesh.ParentBone.Index]; effect.View = camera.viewMatrix; effect.Projection = camera.projectionMatrix; effect.EnableDefaultLighting(); effect.PreferPerPixelLighting = true; } mesh.Draw(); } base.Draw(gameTime); } More Info: Rotating the object via it's properties works fine so I'm guessing there's something up with the code rather than with the object itself. Translating the object also causes the objects to get moved independently of each other rather than as a single model and each piece becomes spread around the scene. The model is in .X format.

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• MVC and delegation

  - by timjver

  I am a beginning iOS programmer and use the Model-View-Controller model as a design pattern: my model doesn't know anything about my view (in order to make it compatible with any view), my view doesn't know anything about my model so they interact via my controller. A very usual way for a view to interact with the controller is through delegation: when the user interacts with the app, my view will notify my controller, which can call some methods of my model and update my view, if necessary. However, would it make sense to also make my controller the delegate of my model? I'm not convinced this is the way to go. It could be handy for my model to notify my controller of some process being finished, for example, or to ask for extra input of the user if it doesn't have enough information to complete the task. The downside of this, though, is that my controller would be the delegate for both my controller and my model, so there wouldn't be really a proper way to notify my model of changes in my view, and vice versa. (correct me if I'm wrong.) Conclusion: I don't really think it's a good idea to to have my controller to be the delegate of my model, but just being the delegate of my view would be fine. Is this the way most MVC models handle? Or is there a way to have the controller be the delegate of both the controller and the model, with proper communication between them? Like I said, I'm a beginner, so I want to do such stuff the right way immediately, rather than spending loads of hours on models that won't work anyway. :)

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• Could not load type in Custom Profile provider

  - by Cragly

  I am writing a small console application in C# that references a custom assembly that implements custom .net Profile provider. I have added the following sections to my app.config file which references the custom class and assembly. <system.web> <profile defaultProvider="MyCompanyProfileProvider" inherits="MyCompany.Web.User.GenericProfile" automaticSaveEnabled="false"> <providers> <clear/> <add name="MyCompanyProfileProvider" connectionStringName="defaultDatabase" applicationName="/myApplication" type="MyCompany.Web.ProfileProvider, MyCompany.Web"/> </providers> <properties> <add name="JobRoleId" type="System.Int32"/> <add name="LastCompetencyId" type="System.Int32" defaultValue="0"/> <add name="MixSettings" type="System.Xml.XmlDocument"/> </properties> </profile></system.web> However when I run the app in debug mode I get the following error as if it is looking in the System.Web assembly rather than one specified in the app.config file. Could not load type 'MyCompany.Web.User.GenericProfile' from assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. I have a local web app that also uses the assembly and custom Profile provider and that work without any problems. I have checked the referenced assembly is being copied to the output directory. Any ideas??

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• Android custom categories

  - by marian

  Hello, I have a view as a main screen of the application which contains the available application's actions as icon+text pairs ( desktop like). I want to find out programatically what are the activities defined ONLY in my AndroidManifest.xml Suppose I have : < activity android:name="example.mainActivity" android:label="mainActivity" < intent-filter < action android:name="android.intent.action.MAIN" / < category android:name="android.intent.category.LAUNCHER" / < /intent-filter < /activity < activity android:name="example.activity1" android:label="Activity1" < intent-filter < action android:name="android.intent.action.VIEW" / < category android:name="example.custom.ACTIVITY" / < /intent-filter < /activity < activity android:name="example.activity2" android:label="Activity2" < intent-filter < action android:name="android.intent.action.VIEW" / < category android:name="example.custom.ACTIVITY" / < /intent-filter < /activity I want that in the mainActivity to dinamically read Activity1 and Activity2 because when i add Activity3 for example it will be automatically read. I thought that this could be done by defining a custom category, example.custom.ACTIVITY, and in the mainActivity use the packageManager.queryIntentActivities(Intent intent, int flags) but it doesn't seem to be working. I really would like to code it to dinamically discover the installed activities in my application. Do you have any ideas on how to do this? Thank you

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• Magento MAGMI: Product attributes (custom options) not showing up in import

  - by Rodgers and Hammertime

  When importing a CSV into Magento with the MAGMI importing tool, I am unable to import Custom Options (as in size: smalee/medium/large). The import manages to put in the basic products, but the Custom Options don't transfer accross. By custom options I mean the fields Title, Input Type, Is Required, Sort Order Title, Price, Price Type, SKU, Sort Order Title, Price, Price Type, SKU, Sort Order Title, Price, Price Type, SKU, Sort Order and so on ... Found in the custom options menu... Even using the example CSV from the MAGMI SourceForge Wiki: sku,name,description,price,Size:drop_down:1 T-Shirt1,T-Shirt,A T-Shirt,5.00,Small|Medium|Large T-Shirt2,T-Shirt2,Another T-Shirt,6.00,XS|S|M|L|XL ...it fails to import the attributes. So i'm simply using MAGMI with the supplied example data from SourceForge on a blank magento product list, and it doesn't transfer properly. Can anyone shed any light on what might be wrong? I am using Magento ver. 1.6.1.0 if that changes anything. Thanks.

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• E-commerce platform for custom application integration

  - by Zach Smith

  We are building an online subscription-based website and I'm looking for recommendations on which e-commerce platform to use for the checkout process. Requirements include: Only four products. The sign-up process of the site is heavily customized, and after checkout the user should automatically get logged into the subscriber area. Subscriptions will last one year and can be renewed manually. Support for coupons/discount codes at a later point. Since the entire application is custom, we've weighed building a custom checkout but are strongly leaning towards using existing software to avoid having to build lots of admin reporting as well as a coupon engine down the road. The two questions we're pondering are: Is it better to a) build our application custom and use whatever e-commerce software we select just for the payment piece, or b) use the e-commerce software as the basis and build our application around it/as a module/etc? Which e-commerce platform should we use? I've looked into a variety of off the shelf e-commerce software, but it's not clear to me which would be easiest to integrate with. I've researched on the Web and looked at many of the threads on SO to compiled a list of potential candidates: www.magentocommerce.com/ (seems difficult to integrate with) www.prestashop.com/ www.nopcommerce.com/ www.opencart.com/ www.cubecart.com/ www.spreecommerce.com/ www.interspire.com/ www.tradingeye.com/ We're most concerned with the level of effort required with ramping up on the software and then doing the integration with our custom functionality. We're most proficient with PHP, ASP.NET and some ROR and are only considering those technologies. We prefer open source, but would be open to commercial if there's a significant upside. Any experiences with similar projects and advice is greatly appreciated.

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• ASP.NET MVC Model Binding

  - by Noel

  If i have a Controller Action that may recieve both HTTP GET and HTTP POST from a number of different sources with each source sending different data e.g. Source1 performs a form POST with two form items Item1 and Item2 Source2 performs a GET where the data is contained in the query string (?ItemX=2&ItemY=3) Is it possible to have a controller action that will cater for all these cases and perform binding automatically e.g. public ActionResult Test(Dictionary data) { // Do work ... return View(); } Is this possible with a custom binder or some other way? Dont want to work directly with HttpContext.Request if possible

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• Performing text processing on flatpage content to include handling of custom tag

  - by Dzejkob

  Hi. I'm using flatpages app in my project to manage some html content. That content will include images, so I've made a ContentImage model allowing user to upload images using admin panel. The user should then be able to include those images in content of the flatpages. He can of course do that by manually typing image url into <img> tag, but that's not what I'm looking for. To make including images more convenient, I'm thinking about something like this: User edits an additional, let's say pre_content field of CustomFlatPage model (I'm using custom flatpage model already) instead of defining <img> tags directly, he uses a custom tag, something like [img=...] where ... is name of the ContentImage instance now the hardest part: before CustomFlatPage is saved, pre_content field is checked for all [img=...] occurences and they are processed like this: ContentImage model is searched if there's image instance with given name and if so, [img=...] is replaced with proper <img> tag. flatpage actual content is filled with processed pre_content and then flatpage is saved (pre_content is leaved unchanged, as edited by user) The part that I can't cope with is text processing. Should I use regular expressions? Apparently they can be slow for large strings. And how to organize logic? I assume it's rather algorithmic question, but I'm not familliar with text processing in Python enough, to do it myself. Can somebody give me any clues?

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• Implementing custom Matlab functions in Simulink

  - by niko

  Hi, I would like to use custom Matlab function in Simulink. So far I have done it by placing Embedded Matlab Fuction block. However if the custom function contains another custom function the compile process fails. Here is the example of function I am trying to embed in the simulation: function [c, d, iterationsCount] = decodeLDPC(y, H, variance) Lci = initializeLq(y, H, variance); Lr = getLr(Lci); [Lq, c] = getLq(Lci, H, Lr); iterationsCount = 1; while(sum(mod(c * H', 2)) ~= 0) Lr = getLr(Lq); [Lq, c] = getLq(Lq, H, Lr); iterationsCount = iterationsCount + 1; end; G = getGeneratorMatrix(H); d = c/G; where initializeLq and getLr are custom functions as well. I would be very thankful if anyone could suggest a method to implement the above function in the simulation. Thank you.

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• Event OnClick for a button in a custom notification

  - by Simone

  I have a custom notification with a button. To set the notification and use the event OnClick on my button I've used this code: //Notification and intent of the notification Notification notification = new Notification(R.drawable.stat_notify_missed_call, "Custom Notification", System.currentTimeMillis()); Intent mainIntent = new Intent(getBaseContext(), NotificationActivity.class); PendingIntent pendingMainIntent = PendingIntent.getActivity(getBaseContext(), 0, mainIntent , 0); notification.contentIntent = pendingMainIntent; //Remoteview and intent for my button RemoteViews notificationView = new RemoteViews(getBaseContext().getPackageName(), R.layout.remote_view_layout); Intent activityIntent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:190")); PendingIntent pendingLaunchIntent = PendingIntent.getActivity(getBaseContext(), 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT); notificationView.setOnClickPendingIntent(R.id.button1, pendingLaunchIntent); notification.contentView = notificationView; notificationManager.notify(CUSTOM_NOTIFICATION_ID, notification); With this code I've a custom notification with my custom layout...but I can't click the button! every time I try to click the button I click the entire notification and so the script launch the "mainIntent" instead of "activityIntent". I have read in internet that this code doesn't work on all terminals. I have tried it on the emulator and on an HTC Magic but I have always the same problem: I can't click the button! My code is right? someone can help me? Thanks, Simone

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• Runtime Exception when using Custom Healthmonitoring event in medium trust

  - by Elementenfresser

  Hi, I'm using custom healthmonitoring events in ASP.NET We recently moved to a new server with default High Trust Permissions. Literature says that healthmonitoring and custom events should work under Medium or higher trust (http://msdn.microsoft.com/en-us/library/bb398933.aspx). Problem is it doesn't. In less than high trust I get a SecurityException saying The application attempted to perform an operation not allowed by the security policy It works in Full trust or when I remove the inheritance of System.Web.Management.WebErrorEvent. Any suggestions anyone? Here is the super simple code behind with a custom event defined: public partial class Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { try { CallCustomEvent(); } catch (Exception ex) { Response.Write(ex.Message); throw ex; } } /// <summary> /// this metho is never called due to lacking permissions... /// </summary> private void CallCustomEvent() { try { //do something useful here } catch (Exception) { //code to instantiate the forbidden inheritance... WebBaseEvent.Raise(new CustomEvent()); } } } /// <summary> /// custom error inheriting WebErrorEvent which is not allowed in high trust? can't believe that... /// </summary> public class CustomEvent : WebErrorEvent { public CustomEvent() : base("test", HttpContext.Current.Request, 100001, new ApplicationException("dummy")) { } } and the Web Config excerpt for high trust: <system.web> <trust level="High" originUrl="" />

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• InstallExecuteSequence cache interferes with custom action operation

  - by Dima G

  I need to upgrade a product that could be installed in per-user context to a new version that is always in per-machine context. The requirements are: Whether the old version was installed in a Per-User (no matter who) or Per-Machine context should be completely seamless to an administrator user that performs the upgrade. The MSI upgrade should succeed without the need to know the password of the user that originally installed the previous version of the product in a Per-User context. The installation should be performed from a single .msi file (no setup.exe is allowed). The installation should be able to run in a silent (non-UI) mode. No reboots are allowed during installation. My strategy is to find in the beginning of the installation whether the product is already installed in per-user context, and if so, to transform the registry keys manually to Per-Machine context (I checked: no additional changes such as file system changes etc. are needed except this transform). I figured out how to move all appropriate keys in the registry from the user settings to the machine settings (pre-loaded appropriate user hive in case it didn't appear in HKEY_USERS) and created custom action that does it - and it does work when I run it as a stand-alone executable before running the MSI. The problem, however, is that when Windows Installer runs InstallExecuteSequence it first creates a 'cached product context' for all products. So when my custom action runs in the course of InstallExecuteSequence, this cache has already been created. Thus FindRelatedProducts action that determines if older product with same upgrade code exists looks on that cache and ignores the changes that my custom action applied. If before running the MSI the previous product was in per-user context, FindRelatedProducts will look at the cache and not apply the upgrade and remove the previous version, because the new product is in per-machine context, even though the previous product version is already configured to per-machine context in the registry by that time by my custom action. What can be done to solve this problem without violating the requirements stated above?

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• Security Exception when using Custom ASP.NET Healthmonitoring event in medium trust

  - by Elementenfresser

  Hi, I'm using custom healthmonitoring events in ASP.NET We recently moved to a new server with default High Trust Permissions. Literature says that healthmonitoring and custom events should work under Medium or higher trust (http://msdn.microsoft.com/en-us/library/bb398933.aspx). Problem is - it doesn't. In less than full trust I get a SecurityException saying The application attempted to perform an operation not allowed by the security policy It works in Full trust or when I remove the inheritance of System.Web.Management.WebErrorEvent. Any suggestions anyone? Here is the super simple code behind with a custom event defined: public partial class Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { try { CallCustomEvent(); } catch (Exception ex) { Response.Write(ex.Message); throw ex; } } /// <summary> /// this metho is never called due to lacking permissions... /// </summary> private void CallCustomEvent() { try { //do something useful here } catch (Exception) { //code to instantiate the forbidden inheritance... WebBaseEvent.Raise(new CustomEvent()); } } } /// <summary> /// custom error inheriting WebErrorEvent which is not allowed in high trust? can't believe that... /// </summary> public class CustomEvent : WebErrorEvent { public CustomEvent() : base("test", HttpContext.Current.Request, 100001, new ApplicationException("dummy")) { } } and the Web Config excerpt for high trust: <system.web> <trust level="High" originUrl="" />

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• Titanium TableViewRow classname with custom rows

  - by pancake

  I would like to know in what way the 'className' property of a Ti.UI.TableViewRow helps when creating custom rows. For example, I populate a tableview with custom rows in the following way: function populateTableView(tableView, data) { var rows = []; var row; var title, image; var i; for (i = 0; i < data.length; i++) { title = Ti.UI.createLabel({ text : data[i].title, width : 100, height: 30, top: 5, left: 25 }); image = Ti.UI.createImage({ image : 'some_image.png', width: 30, height: 30, top: 5, left: 5 }); /* and, like, 5+ more views or whatever */ row = Ti.UI.createTableViewRow(); row.add(titleLabel); row.add(image); rows.push(row); } tableView.setData(rows); } Of course, this example of a "custom" row is easily created using the standard title and image properties of the TableViewRow, but that isn't the point. How is the allocation of new labels, image views and other child views of a table view prevented in favour of their reuse? I know in iOS this is achieved by using the method -[UITableView dequeueReusableCellWithIdentifier:] to fetch a row object from a 'reservoir' (so 'className' is 'identifier' here) that isn't currently being used for displaying data, but already has the needed child views laid out correctly in it, thus only requiring to update the data contained within (text, image data, etc). As this system is so unbelievably simple, I have a lot of trouble believing the method employed by the Titanium API does not support this. After reading through the API and searching the web, I do however suspect this is the case. The 'className' property is recommended as an easy way to make table views more efficient in Titanium, but its relation to custom table view rows is not explained in any way. If anyone could clarify this matter for me, I would be very grateful.

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• WPML is not detecting Wordpress custom post types

  - by janoChen

  I learned how to make custom post types with the following tutorial: http://sixrevisions.com/wordpress/wordpress-custom-post-types-guide/ It basically consist in adding this code to function.php: add_action( 'init', 'create_events' ); function create_events() { $labels = array( 'name' => _x('Events', 'post type general name'), 'singular_name' => _x('Event', 'post type singular name'), 'add_new' => _x('Add New', 'Event'), 'add_new_item' => __('Add New Event'), 'edit_item' => __('Edit Event'), 'new_item' => __('New Event'), 'view_item' => __('View Event'), 'search_items' => __('Search Events'), 'not_found' => __('No Events found'), 'not_found_in_trash' => __('No Events found in Trash'), 'parent_item_colon' => '' ); $supports = array('title', 'editor', 'custom-fields', 'revisions', 'excerpt'); register_post_type( 'event', array( 'labels' => $labels, 'public' => true, 'supports' => $supports ) ); } The WPML plugin help you to translate posts to different langauges. But this option doesn't appear in the custom post types. Any suggestions?

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• Django Getting RequestContext in custom tag

  - by greggory.hz

  I'm trying to create a custom tag. Inside this custom tag, I want to be able to have some logic that checks if the user is logged in, and then have the tag rendered accordingly. This is what I have: class UserActionNode(template.Node): def __init__(self): pass def render(self, context): if context.user.is_authenticated(): return render_to_string('layout_elements/sign_in_register.html'); else: return render_to_string('layout_elements/logout_settings.html'); def user_actions(parser, test): return UserActionNode() register.tag('user_actions', user_actions) When I run this, I get this error: Caught AttributeError while rendering: 'Context' object has no attribute 'user' The view that renders this looks like this: return render_to_response('start/home.html', {}, context_instance=RequestContext(request)) Why doesn't the tag get a RequestContext object instead of the Context object? How can I get the tag to receive the RequestContext instead of the Context? EDIT: Whether or not it's possible to get a RequestContext inside a custom tag, I'd still be interested to know the "correct" or best way to determine a user's authentication state from within the custom tag. If that's not possible, then perhaps that kind of logic belongs elsewhere? Where?

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• Custom authentication method for GDM

  - by FMC

  I am trying to find a way of authenticating users on public computers through GDM, but I have a few things to be taken in account. The users do not have a login/password, they only thing they are given is a string. This string is unique and will allow us to identify them. You can see this string as a login without a password. The users must be present in a remote database The users must have the rights to login on the computer they are on at that time. A remote database would check if a booking on the computer had been set for that time by that user. Or if no booking had been made, allow to login. A default user id/home/gid has to be set to the user once logged in I have found ways to deal with most of those requirements, but not altogether. PAM looks nice to set up a custom way of checking if the user booked its computer. NSS MySQL looks nice to set up the environment. Would you know how to set up the environment by myself using a custom PAM module (using pam_python would be preferred)? Or any other method that could help me? Thanks in advance!

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• How to do custom sorting using unix sort?

  - by jewelia

  I'm using unix sort to sort a comma delimited file with multiple columns. Thus far, this has worked perfectly for sorting the data either numerically or in alphabetical order: Example file before any sorting: C,United States,WA,Tacoma,f,1 A,United States,MA,Boston,f,0 B,United States,NY,New York,f,5 A,Canada,QC,Montreal,f,2 A,Bahamas,Bahamas,Nassau,f,2 A,United States,NY,New York,f,1 Sort the file: $ sort -t ',' -k 2,2 -k 3,3 -k 4,4 -k 5,5r -k 6,6nr tmp.csv Sorted result: A,Bahamas,Bahamas,Nassau,f,2 A,Canada,QC,Montreal,f,2 A,United States,MA,Boston,f,0 B,United States,NY,New York,f,5 A,United States,NY,New York,f,1 C,United States,WA,Tacoma,f,1 Here is the issue: I want to sort column 2 based on a custom sort, meaning I want United States first, then Canada, then Bahamas: Desired sort: A,United States,MA,Boston,f,0 B,United States,NY,New York,f,5 A,United States,NY,New York,f,1 C,United States,WA,Tacoma,f,1 A,Canada,QC,Montreal,f,2 A,Bahamas,Bahamas,Nassau,f,2 Is there some way to pass unix sort a custom sort order that it can then apply? Something like: $ sort -t ',' -k 2,2:'United States, Canada, Bahamas' -k 3,3 -k 4,4 -k 5,5r -k 6,6nr tmp.csv Thanks!

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• Custom HTTP Status Codes (a la Twitter 420: Enhance Your Calm) [migrated]

  - by Max Bucknell

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

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• nginx & php-fpm and custom header

  - by nixer

  I would like to pass some custom header (ACCESS_TOKEN) from client RESTful application (JS) to application server (php-fpm). I had read that nginx should pass all http headers to php, but somehow it does not come to my php :( I can see it in firebug http://o7.no/N6DM7q but can't see it in $_SERVER variable. it just does not exist in $_SERVER array. I'm thinking that i need to pass it manually. Now my config looks like that: location @php-fpm { include /etc/nginx/fastcgi_params; fastcgi_pass unix:/tmp/php5-fpm.sock; fastcgi_param REQUEST_URI /index.php$request_uri; fastcgi_param SCRIPT_FILENAME /htdocs/index.php; fastcgi_param PATH_INFO $fastcgi_script_name; fastcgi_param DOCUMENT_ROOT /htdocs; } } and when I add new line in location definition: location @php-fpm { include /etc/nginx/fastcgi_params; ... fastcgi_param ACCESS_TOKEN $http_access_token; } } or even if i will add it into fastcgi_params file it does not help :( if I put into location part next line: fastcgi_param ACCESS_TOKEN $http_access_token; then in php it has empty value :( how I can pass custom header from client to backend (php) via nginx ?

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• Router that allows custom Dynamic DNS server [closed]

  - by Thuy

  I've made my own DDNS service and it works fine using an application running on clients to update the IP. But if for some reason I don't have the choice of using my software and instead I need to use a router to update the IP, it becomes troublesome. For example, I needed to setup IPsec from a customer to me and the customers router/firewall (netgear srx5308) has a dynamic IP which is given from the ISP which can't offer static IPs. So it needs to use dynamic dns for it to work. In this case there really isn't a client to run the software on since it's a router/firewall. Unfortunately it seems that most routers are rather unfriendly towards custom DDNS solutions and most offer only dyndns.com or similar templates. Which was the case with this router too. Leaving me with no way to use my own dynamic dns server IP. I have the option of switching out the customers router and I've been looking around for alternatives and other routers/solutions and I was wondering if anyone on this great site might have been in a similar situation or might just know about some router/firewall that is more friendly towards custom ddns solutions that I might be able to use. Thanks in advance for any help or guidance!

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• Gnome, open with, custom command, filename reference

  - by Tergiver

  I want to execute this custom command on a file from the Gnome File Browser: hexdump -C $f > $f.dump That would create a hexdump of the file with the file's name + .dump in the directory that the file exists in. When I say $f above I mean something that would substitute the name of the file that was opened. So I've tried "Open with", "Use a custom command". I can't get it to work. I've tried a number of symbols in place of $f. Is it even possible? Before you suggest getting a GUI hexdump program, this is just one example. I have the need to do this sort of thing for many terminal-type programs. Am I the only person on Earth who wishes for a hybrid File-Browser-slash-Command-Terminal? That would be a file browser which contained a terminal pane who's current directory always matched that of the file browser. One could execute shell commands in the context of what they were viewing in the browser.

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• stopping fastcgi_cache for php-enabled custom error page

  - by Ian

  Since enabling the fastcgi_cache on my nginx server, my php-enabled custom error page has suddenly stopped working and I'm getting the internal 404 message instead. In nginx.conf: fastcgi_cache_path /var/lib/nginx/fastcgicache levels=1:2 keys_zone=MYCACHE:5m inactive=2h max_size=1g loader_files=1000 loader_threshold=2000; map $http_cookie $no_cache { default 0; ~SESS 1; } fastcgi_cache_key "$scheme$request_method$host$request_uri"; add_header X-My-Cache $upstream_cache_status; map $uri $no_cache_dirs { default 0; ~^/(?:phpMyAdmin|rather|poll|webmail|skewed|blogs|galleries|pixcache) 1; } the cache relevant stuff in my fastcgi.conf: fastcgi_cache MYCACHE; fastcgi_keep_conn on; fastcgi_cache_bypass $no_cache $no_cache_dirs; fastcgi_no_cache $no_cache $no_cache_dirs; fastcgi_cache_valid 200 301 5m; fastcgi_cache_valid 302 5m; fastcgi_cache_valid 404 1m; fastcgi_cache_use_stale error timeout invalid_header updating http_500; fastcgi_ignore_headers Cache-Control Expires; expires epoch; fastcgi_cache_lock on; If I disable the fastcgi_cache, the php-enabled 404 page works as it has for years. How would I disable the cache for the custom error page?

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• A ToDynamic() Extension Method For Fluent Reflection

  - by Dixin

  Recently I needed to demonstrate some code with reflection, but I felt it inconvenient and tedious. To simplify the reflection coding, I created a ToDynamic() extension method. The source code can be downloaded from here. Problem One example for complex reflection is in LINQ to SQL. The DataContext class has a property Privider, and this Provider has an Execute() method, which executes the query expression and returns the result. Assume this Execute() needs to be invoked to query SQL Server database, then the following code will be expected: using (NorthwindDataContext database = new NorthwindDataContext()) { // Constructs the query. IQueryable<Product> query = database.Products.Where(product => product.ProductID > 0) .OrderBy(product => product.ProductName) .Take(2); // Executes the query. Here reflection is required, // because Provider, Execute(), and ReturnValue are not public members. IEnumerable<Product> results = database.Provider.Execute(query.Expression).ReturnValue; // Processes the results. foreach (Product product in results) { Console.WriteLine("{0}, {1}", product.ProductID, product.ProductName); } } Of course, this code cannot compile. And, no one wants to write code like this. Again, this is just an example of complex reflection. using (NorthwindDataContext database = new NorthwindDataContext()) { // Constructs the query. IQueryable<Product> query = database.Products.Where(product => product.ProductID > 0) .OrderBy(product => product.ProductName) .Take(2); // database.Provider PropertyInfo providerProperty = database.GetType().GetProperty( "Provider", BindingFlags.NonPublic | BindingFlags.GetProperty | BindingFlags.Instance); object provider = providerProperty.GetValue(database, null); // database.Provider.Execute(query.Expression) // Here GetMethod() cannot be directly used, // because Execute() is a explicitly implemented interface method. Assembly assembly = Assembly.Load("System.Data.Linq"); Type providerType = assembly.GetTypes().SingleOrDefault( type => type.FullName == "System.Data.Linq.Provider.IProvider"); InterfaceMapping mapping = provider.GetType().GetInterfaceMap(providerType); MethodInfo executeMethod = mapping.InterfaceMethods.Single(method => method.Name == "Execute"); IExecuteResult executeResult = executeMethod.Invoke(provider, new object[] { query.Expression }) as IExecuteResult; // database.Provider.Execute(query.Expression).ReturnValue IEnumerable<Product> results = executeResult.ReturnValue as IEnumerable<Product>; // Processes the results. foreach (Product product in results) { Console.WriteLine("{0}, {1}", product.ProductID, product.ProductName); } } This may be not straight forward enough. So here a solution will implement fluent reflection with a ToDynamic() extension method: IEnumerable<Product> results = database.ToDynamic() // Starts fluent reflection. .Provider.Execute(query.Expression).ReturnValue; C# 4.0 dynamic In this kind of scenarios, it is easy to have dynamic in mind, which enables developer to write whatever code after a dot: using (NorthwindDataContext database = new NorthwindDataContext()) { // Constructs the query. IQueryable<Product> query = database.Products.Where(product => product.ProductID > 0) .OrderBy(product => product.ProductName) .Take(2); // database.Provider dynamic dynamicDatabase = database; dynamic results = dynamicDatabase.Provider.Execute(query).ReturnValue; } This throws a RuntimeBinderException at runtime: 'System.Data.Linq.DataContext.Provider' is inaccessible due to its protection level. Here dynamic is able find the specified member. So the next thing is just writing some custom code to access the found member. .NET 4.0 DynamicObject, and DynamicWrapper<T> Where to put the custom code for dynamic? The answer is DynamicObject’s derived class. I first heard of DynamicObject from Anders Hejlsberg's video in PDC2008. It is very powerful, providing useful virtual methods to be overridden, like: TryGetMember() TrySetMember() TryInvokeMember() etc.  (In 2008 they are called GetMember, SetMember, etc., with different signature.) For example, if dynamicDatabase is a DynamicObject, then the following code: dynamicDatabase.Provider will invoke dynamicDatabase.TryGetMember() to do the actual work, where custom code can be put into. Now create a type to inherit DynamicObject: public class DynamicWrapper<T> : DynamicObject { private readonly bool _isValueType; private readonly Type _type; private T _value; // Not readonly, for value type scenarios. public DynamicWrapper(ref T value) // Uses ref in case of value type. { if (value == null) { throw new ArgumentNullException("value"); } this._value = value; this._type = value.GetType(); this._isValueType = this._type.IsValueType; } public override bool TryGetMember(GetMemberBinder binder, out object result) { // Searches in current type's public and non-public properties. PropertyInfo property = this._type.GetTypeProperty(binder.Name); if (property != null) { result = property.GetValue(this._value, null).ToDynamic(); return true; } // Searches in explicitly implemented properties for interface. MethodInfo method = this._type.GetInterfaceMethod(string.Concat("get_", binder.Name), null); if (method != null) { result = method.Invoke(this._value, null).ToDynamic(); return true; } // Searches in current type's public and non-public fields. FieldInfo field = this._type.GetTypeField(binder.Name); if (field != null) { result = field.GetValue(this._value).ToDynamic(); return true; } // Searches in base type's public and non-public properties. property = this._type.GetBaseProperty(binder.Name); if (property != null) { result = property.GetValue(this._value, null).ToDynamic(); return true; } // Searches in base type's public and non-public fields. field = this._type.GetBaseField(binder.Name); if (field != null) { result = field.GetValue(this._value).ToDynamic(); return true; } // The specified member is not found. result = null; return false; } // Other overridden methods are not listed. } In the above code, GetTypeProperty(), GetInterfaceMethod(), GetTypeField(), GetBaseProperty(), and GetBaseField() are extension methods for Type class. For example: internal static class TypeExtensions { internal static FieldInfo GetBaseField(this Type type, string name) { Type @base = type.BaseType; if (@base == null) { return null; } return @base.GetTypeField(name) ?? @base.GetBaseField(name); } internal static PropertyInfo GetBaseProperty(this Type type, string name) { Type @base = type.BaseType; if (@base == null) { return null; } return @base.GetTypeProperty(name) ?? @base.GetBaseProperty(name); } internal static MethodInfo GetInterfaceMethod(this Type type, string name, params object[] args) { return type.GetInterfaces().Select(type.GetInterfaceMap).SelectMany(mapping => mapping.TargetMethods) .FirstOrDefault( method => method.Name.Split('.').Last().Equals(name, StringComparison.Ordinal) && method.GetParameters().Count() == args.Length && method.GetParameters().Select( (parameter, index) => parameter.ParameterType.IsAssignableFrom(args[index].GetType())).Aggregate( true, (a, b) => a && b)); } internal static FieldInfo GetTypeField(this Type type, string name) { return type.GetFields( BindingFlags.GetField | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).FirstOrDefault( field => field.Name.Equals(name, StringComparison.Ordinal)); } internal static PropertyInfo GetTypeProperty(this Type type, string name) { return type.GetProperties( BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).FirstOrDefault( property => property.Name.Equals(name, StringComparison.Ordinal)); } // Other extension methods are not listed. } So now, when invoked, TryGetMember() searches the specified member and invoke it. The code can be written like this: dynamic dynamicDatabase = new DynamicWrapper<NorthwindDataContext>(ref database); dynamic dynamicReturnValue = dynamicDatabase.Provider.Execute(query.Expression).ReturnValue; This greatly simplified reflection. ToDynamic() and fluent reflection To make it even more straight forward, A ToDynamic() method is provided: public static class DynamicWrapperExtensions { public static dynamic ToDynamic<T>(this T value) { return new DynamicWrapper<T>(ref value); } } and a ToStatic() method is provided to unwrap the value: public class DynamicWrapper<T> : DynamicObject { public T ToStatic() { return this._value; } } In the above TryGetMember() method, please notice it does not output the member’s value, but output a wrapped member value (that is, memberValue.ToDynamic()). This is very important to make the reflection fluent. Now the code becomes: IEnumerable<Product> results = database.ToDynamic() // Here starts fluent reflection. .Provider.Execute(query.Expression).ReturnValue .ToStatic(); // Unwraps to get the static value. With the help of TryConvert(): public class DynamicWrapper<T> : DynamicObject { public override bool TryConvert(ConvertBinder binder, out object result) { result = this._value; return true; } } ToStatic() can be omitted: IEnumerable<Product> results = database.ToDynamic() .Provider.Execute(query.Expression).ReturnValue; // Automatically converts to expected static value. Take a look at the reflection code at the beginning of this post again. Now it is much much simplified! Special scenarios In 90% of the scenarios ToDynamic() is enough. But there are some special scenarios. Access static members Using extension method ToDynamic() for accessing static members does not make sense. Instead, DynamicWrapper<T> has a parameterless constructor to handle these scenarios: public class DynamicWrapper<T> : DynamicObject { public DynamicWrapper() // For static. { this._type = typeof(T); this._isValueType = this._type.IsValueType; } } The reflection code should be like this: dynamic wrapper = new DynamicWrapper<StaticClass>(); int value = wrapper._value; int result = wrapper.PrivateMethod(); So accessing static member is also simple, and fluent of course. Change instances of value types Value type is much more complex. The main problem is, value type is copied when passing to a method as a parameter. This is why ref keyword is used for the constructor. That is, if a value type instance is passed to DynamicWrapper<T>, the instance itself will be stored in this._value of DynamicWrapper<T>. Without the ref keyword, when this._value is changed, the value type instance itself does not change. Consider FieldInfo.SetValue(). In the value type scenarios, invoking FieldInfo.SetValue(this._value, value) does not change this._value, because it changes the copy of this._value. I searched the Web and found a solution for setting the value of field: internal static class FieldInfoExtensions { internal static void SetValue<T>(this FieldInfo field, ref T obj, object value) { if (typeof(T).IsValueType) { field.SetValueDirect(__makeref(obj), value); // For value type. } else { field.SetValue(obj, value); // For reference type. } } } Here __makeref is a undocumented keyword of C#. But method invocation has problem. This is the source code of TryInvokeMember(): public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result) { if (binder == null) { throw new ArgumentNullException("binder"); } MethodInfo method = this._type.GetTypeMethod(binder.Name, args) ?? this._type.GetInterfaceMethod(binder.Name, args) ?? this._type.GetBaseMethod(binder.Name, args); if (method != null) { // Oops! // If the returnValue is a struct, it is copied to heap. object resultValue = method.Invoke(this._value, args); // And result is a wrapper of that copied struct. result = new DynamicWrapper<object>(ref resultValue); return true; } result = null; return false; } If the returned value is of value type, it will definitely copied, because MethodInfo.Invoke() does return object. If changing the value of the result, the copied struct is changed instead of the original struct. And so is the property and index accessing. They are both actually method invocation. For less confusion, setting property and index are not allowed on struct. Conclusions The DynamicWrapper<T> provides a simplified solution for reflection programming. It works for normal classes (reference types), accessing both instance and static members. In most of the scenarios, just remember to invoke ToDynamic() method, and access whatever you want: StaticType result = someValue.ToDynamic()._field.Method().Property[index]; In some special scenarios which requires changing the value of a struct (value type), this DynamicWrapper<T> does not work perfectly. Only changing struct’s field value is supported. The source code can be downloaded from here, including a few unit test code.

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