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Articles indexed Thursday March 11 2010

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  • Which HTTP redirect status code is best for this REST API scenario?

    - by Aseem Kishore
    I'm working on a REST API. The key objects ("nouns") are "items", and each item has a unique ID. E.g. to get info on the item with ID foo: GET http://api.example.com/v1/item/foo New items can be created, but the client doesn't get to pick the ID. Instead, the client sends some info that represents that item. So to create a new item: POST http://api.example.com/v1/item/ hello=world&hokey=pokey With that command, the server checks if we already have an item for the info hello=world&hokey=pokey. So there are two cases here. Case 1: the item doesn't exist; it's created. This case is easy. 201 Created Location: http://api.example.com/v1/item/bar Case 2: the item already exists. Here's where I'm struggling... not sure what's the best redirect code to use. 301 Moved Permanently? 302 Found? 303 See Other? 307 Temporary Redirect? Location: http://api.example.com/v1/item/foo I've studied the Wikipedia descriptions and RFC 2616, and none of these seem to be perfect. Here are the specific characteristics I'm looking for in this case: The redirect is permanent, as the ID will never change. So for efficiency, the client can and should make all future requests to the ID endpoint directly. This suggests 301, as the other three are meant to be temporary. The redirect should use GET, even though this request is POST. This suggests 303, as all others are technically supposed to re-use the POST method. In practice, browsers will use GET for 301 and 302, but this is a REST API, not a website meant to be used by regular users in browsers. It should be broadly usable and easy to play with. Specifically, 303 is HTTP/1.1 whereas 301 and 302 are HTTP/1.0. I'm not sure how much of an issue this is. At this point, I'm leaning towards 303 just to be semantically correct (use GET, don't re-POST) and just suck it up on the "temporary" part. But I'm not sure if 302 would be better since in practice it's been the same behavior as 303, but without requiring HTTP/1.1. But if I go down that line, I wonder if 301 is even better for the same reason plus the "permanent" part. Thoughts appreciated!

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  • Coldfusion CFC creation taking a variable amout of time to execute.

    - by Bazza
    I've been doing some logging of object creation times in our open account process in production. Periodically, initializing an object would take way longer than expected. By initializing I mean calling it's init() and passing a couple of arguments that may be simple variables or objects. e.g. <cfset validateObj = createObject("component", "compExample").init( productionMode = VARIABLES.productionMode, ipWhiteListed = isWhiteListed, ipLocatorObj = VARIABLES.ipLocatorObj ) /> Thats all that happens in init() methods. Generally the execution time would be 0ms, but at random times I might get 3 or 3.5 seconds. This is not specific to one particular server or to our generally busy period. It appears to be quite random. One thought was that these templates were being evicted from our template cache as they are not especially frequently used, although I checked cfstat on a number of servers and the max CP/Sec is -1. Running CF 8,0,1 Has anybody else ever come across this?

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  • jQuery toggle() with unknown initial state

    - by Jason Morhardt
    I have a project that I am working on that uses a little image to mark a record as a favorite on multiple rows in a table. The data gets pulled from a DB and the image is based on whether or not that item is a favorite. One image for a favorite, a different image if not a favorite. I want the user to be able to toggle the image and make it a favorite or not. Here's my code: $(function () { $('.FavoriteToggle').toggle( function () { $(this).find("img").attr({src:"../../images/icons/favorite.png"}); var ListText = $(this).find('.FavoriteToggleIcon').attr("title"); var ListID = ListText.match(/\d+/); $.ajax({ url: "include/AJAX.inc.php", type: "GET", data: "action=favorite&ItemType=0&ItemID=" + ListID, success: function () {} }); }, function () { $(this).find("img").attr({src:"../../images/icons/favorite_not.png"}); var ListText = $(this).find('.FavoriteToggleIcon').attr("title"); var ListID = ListText.match(/\d+/); $.ajax({ url: "include/AJAX.inc.php", type: "GET", data: "action=favorite&ItemType=0&ItemID=" + ListID, success: function () {} }); } ); }); Works great if the initial state is not a favorite. But you have to double click to get the image to change if it IS a favorite initially. This causes the AJAX to fire twice and essentially make it a favorite then not a favorite before the image responds. The user thinks he's made it a favorite because the image changed, but in fact, it's not. Help anybody?

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  • jQuery Thickbox and Google Maps Extinfowindow

    - by cdonner
    I am trying to place a link into an Extinfowindow that obtains its content through an Ajax call. So, I click on a push pin marker, up pops the Extinfowindow with my ThickBox link in it, and when I inspect the DOM for the entire page at that point, I can see the element correctly showing up with the "thickbox" class. The link looks like this <A class="thickbox" title="" href="http://localhost:1293/Popup.aspx? height=200&width=300&modal=true">Modal Popup</A> However, when I click on it, it does a full refresh and the target page loads in the browser, not in a popup. It seems that when the <A> for the Thickbox control is injected into the DOM after the initial load, jQuery is no longer able to do its magic and intercept the anchor link request. Does anybody have thoughts about how to do this better?

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  • Using a Dependency Injection Container in an enterprise solution with multiple different configurati

    - by KevinT
    Can anyone point me towards some good documentation / code examples on how best to manage the configuration of a DI container in a scenario where you need different configuations sets? We have a layered, distributed application that has multiple entry points (ie; a website, winforms app, office plugin etc). Depending on how you are using the solution (through a UI vs. an automated workflow for example), it needs to be configured slightly differently. We are using Windsor, and it's fluent configuration capabilities.

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  • WCF contracts - namespaces and SerializationExceptions

    - by qntmfred
    I am using a third party web service that offers the following calls and responses http://api.athirdparty.com/rest/foo?apikey=1234 <response> <foo>this is a foo</foo> </response> and http://api.athirdparty.com/rest/bar?apikey=1234 <response> <bar>this is a bar</bar> </response> This is the contract and supporting types I wrote [ServiceContract] [XmlSerializerFormat] public interface IFooBarService { [OperationContract] [WebGet( BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Xml, UriTemplate = "foo?key={apikey}")] FooResponse GetFoo(string apikey); [OperationContract] [WebGet( BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Xml, UriTemplate = "bar?key={apikey}")] BarResponse GetBar(string apikey); } [XmlRoot("response")] public class FooResponse { [XmlElement("foo")] public string Foo { get; set; } } [XmlRoot("response")] public class BarResponse { [XmlElement("bar")] public string Bar { get; set; } } and then my client looks like this static void Main(string[] args) { using (WebChannelFactory<IFooBarService> cf = new WebChannelFactory<IFooBarService>("thirdparty")) { var channel = cf.CreateChannel(); FooResponse result = channel.GetFoo("1234"); } } When I run this I get the following exception Unable to deserialize XML body with root name 'response' and root namespace '' (for operation 'GetFoo' and contract ('IFooBarService', 'http://tempuri.org/')) using XmlSerializer. Ensure that the type corresponding to the XML is added to the known types collection of the service. If I comment out the GetBar operation from IFooBarService, it works fine. I know I'm missing an important concept here - just don't know quite what to look for. What is the proper way to construct my contract types, so that they can be properly deserialized?

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  • Apache file caching

    - by danp
    How does apache handle caching of certain files, and is it possible to explicitly say that certain files should be aggressively cached more than others, through the standard config files for a given host or virtualhost? To put it in context, I keep a lot of site content in various XML files, and I'd like to be able to say that this file will be used a lot, and therefore cache it as much as possible..? Does apache do this kind of thing intelligently and on the fly..? Will it observe which files are more popular than others and try to match cache hits appropriately..? Lots of questions in one, but the basic idea should be clear enough. edit: to be clear, these are resource files which are loaded and interpreted by PHP - but php as a process is spawned inside apache.. right? Please help!

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  • Custom UITextField blurred text

    - by David
    When a UITextField with custom frame (200 × 54 px) loses focus, the text looks a little bit blurry. example screenshot Is this a common problem? Any workaround / solution or am I doing something wrong?

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  • TArray<Byte> VS TBytes VS PByteArray

    - by Ken Bourassa
    Those 3 types are very similar... TArray is the generic version of TBytes. Both can be casted to PByteArray and used as buffer for calls to Windows API. (with the same restrictions as string to Pchar). What I would like to know: Is this behavior "by design" or "By Implementation". Or more specifically, could it break in future release?

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  • Alternates to C++ Reference/Pointer Syntax

    - by Jon Purdy
    What languages other than C and C++ have explicit reference and pointer type qualifiers? People seem to be easily confused by the right-to-left reading order of types, where char*& is "a reference to a pointer to a character", or a "character-pointer reference"; do any languages with explicit references make use of a left-to-right reading order, such as &*char/ref ptr char? I'm working on a little language project, and legibility is one of my key concerns. It seems to me that this is one of those questions to which it's easy for a person but hard for a search engine to provide an answer. Thanks in advance!

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  • JQuery UI Datepicker date format issue with initial value

    - by Mithun
    I need to set the initial date for the date picker to 03/20/2010 in mm-dd-yyyyy format. I have done this <input id='datepicker' type='text' value='20/03/2010' /> But my problem is on clicking the field date picker populates with today's date as highlighed and no date selected, and up on selecting date value But when i change my input field like one below <input id='datepicker' type='text' value='03/20/2010' /> Date picker is populating March 20 as selected date and current date highlighted. But all in 'mm-dd-yyyy' format! I want show all dates in 'dd-mm-yyyy' format. How can I solve this?

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  • How to specify an SSH key for Hudson with git plugin?

    - by jlpp
    I've got Hudson (continuous integration system) with the git plugin running on a Tomcat Windows Service. msysgit is installed and the msysgit bin dir is in the path. PuTTY/Pageant/plink are installed and msysgit is configured to use them. The trouble I'm running in to, I think, is that the user who owns the Tomcat/Hudson service (Local System) has no SSH key set up to be able to clone the git repository. When the git Hudson plugin tries to clone it gives the error: $ git clone -o origin git@hostname:project.git "e:\HUDSON_HOME\jobs\Project Trunk\workspace" ERROR: Error cloning remote repo 'origin' : Could not clone git@hostname:project.git ERROR: Cause: Error performing git clone -o origin git@hostname:project.git e:\HUDSON_HOME\jobs\Project Trunk\workspace Trying next repository ERROR: Could not clone from a repository FATAL: Could not clone hudson.plugins.git.GitException: Could not clone My question is, how can I set things up so that the git plugin/msysgit know to use a particular SSH private key when trying to clone? I don't think Pageant will work because the Tomcat service is running as the "Local System" user, but I may be wrong.

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  • Multiple servers acting like a single one with all the hardware?

    - by marc.riera
    Hello, by now I have 10 servers for hpc, power computing oriented. My users need to launch several processes using qmake. The users are used to work with ubuntu 9.10, and the software from the repositories is switable for them. I've deployed ubuntu 9.10 to all 10 servers (pxe rocks). By now we work with parallel-ssh and cluster-ssh, which allows as to launch the same process to all servers. With this tools this tools the servers remain as independent but with the same software and the same launched command. Now we would like to go to next step and see all the servers as a single one with all the resources from the other 9 as if was its resources. The difference would be substantial in time to process and also time to design the command to launch. Any advice on wich software to use will be very useful? Thanks

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  • Trimming article length in Google Reader

    - by Dov
    I'm considering switching to Google Reader from Safari's RSS reader. One feature that I would absolutely miss from Safari is its Article Length slider it gives you for each feed, so you can choose to show more or less content. Is there any way to achieve this in Google Reader's Expanded view? PS I also posted this question on Google's Help forum here.

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