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  • does a ruby on rails rack class get access to the entire rails environment?

    - by Andrew Arrow
    that is when the def call(env) method is invoked by hitting any url, can I inside that method make some ActiveRecord queries, use classes defined in lib, etc. etc. Or is it more like an irb console without the rails env loaded? Another way to put it with a rake task example: task :foo => :environment do # with env end task :foo2 do # without env end I would think rack classes would NOT get the environment so they are super fast and don't take all the overhead of a normal rails request. But that doesn't seem to be the case. I CAN make ActiveRecord queries inside my rack class. So what is the advantage of rack then?

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  • Help submitting an asp.net form with jquery

    - by batman_man
    I'm trying to post the entire asp.net form to a certain url. I have tried: $.post("http://www.someaddress.com", $("form").serialize()); I have also tried: $.ajax({ type:"POST", url:"http://www.someaddress.com", data: $('form').serialize(), success: function(){ alert('yay'); } }); In both cases the submit is fine but no data is passed along with it. When i test the form.serialize() in firebug console, this shows my form serialized just fine. When i view the submit in fiddler, i can see that the data part is not set. Maybe im not understanding the data part, but every single tutorial shows this as the way to go - serialize the form and set that as data. What must i do to get my serialized form as the data in my request? What am i missing? Also - why does the NET tab in firebug show all these requests as method OPTIONS?

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  • C#: Why only integral enums?

    - by JamesBrownIsDead
    I've been writing C# for seven years now, and I keep wondering, why do enums have to be of an integral type? Wouldn't it be nice to do something like: enum ErrorMessage { NotFound: "Could not find", BadRequest: "Malformed request" } Is this a language design choice, or are there fundamental incompatibilities on a compiler, CLR, or IL level? Do other languages have enums with string or complex (i.e. object) types? What languages? (I'm aware of workarounds; my question is, why are they needed?) EDIT: "workarounds" = attributes or static classes with consts :)

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  • parser error in asp.net?

    - by Surya sasidhar
    hi, i developed a web application it is working fine in local server. when i uploaded the site in online when i click on some of the buttons i am getting this error. I am using master page, but i am not place the scriptmanager in master page,i place the scriptmanager tag in every page. It is working fine in local server but it is giving error in online. please can u help me. Thank you Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Unknown server tag 'asp:ScriptManager'. Source Error: Line 9: <asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server"> Line 10: Line 11: <asp:ScriptManager ID="ScriptManager1" runat="server"> Line 12: </asp:ScriptManager> Line 13: <asp:UpdatePanel id="UpdatePanel2" runat="server" UpdateMode="Conditional">

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  • Format attribute of <bean:write> tag in Struts

    - by Sushant Taneja
    Hello All, I am developing a web application using Struts 1.2.7 I want to print a list of integers using the tag. I searched and found that the format attribute is used to print the desired result but was unsuccessful. What should I pass as the value in format to print 3 digit integers/floating point numbers. The code sample is as follows: <logic:iterate name="intList" id="integer" > <bean:write name="integer" /> <logic:iterate /> Here intList is a List of int(s) passed as a request attribute to the jsp page under consideration.

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  • How to get site context/information during the PreapplicationStartMethod

    - by Mike
    When you run the same web based application as a multi-tenant application for different clients is there a way during the PreapplicationStartMethod to gain some kind of context to the site that is being started? More specifically I'd like to get the host header information (the "bindingInformation" attribute value from the applicationHost.config); I have found ways to get this information at the time of a specific request long after the application has started. Is there a way to get the information during the application startup process? This is an MVC 3 application and IIS 7.5.

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  • mysqli and php requesting rows returned in object oriented scripting...

    - by Matt
    in object oriented php mysqli I am trying to request a username, and return if it matches a row, without actually returning any user data. How would I write this?...so far I have... $sql = "SELECT NULL FROM database WHERE usernick=?"; $stmt = $link->prepare($sql) $stmt->bind_param('s', $snr); $stmt->execute(); After this step I need to see if a row matched the query...but I have no idea how to write it, everyone here pretty much writes in mysql if I dont mention I want object oriented mysqli :S

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  • ASP.NET MVC - How to Preserve ModelState Errors Across RedirectToAction?

    - by RPM1984
    Hi Guys, I have the following two action methods (simplified for question): [HttpGet] public ActionResult Create(string uniqueUri) { // get some stuff based on uniqueuri, set in ViewData. return View(); } [HttpPost] public ActionResult Create(Review review) { // validate review if (validatedOk) { return RedirectToAction("Details", new { postId = review.PostId}); } else { ModelState.AddModelError("ReviewErrors", "some error occured"); return RedirectToAction("Create", new { uniqueUri = Request.RequestContext.RouteData.Values["uniqueUri"]}); } } So, if the validation passes, i redirect to another page (confirmation). If an error occurs, i need to display the same page with the error. If i do return View(), the error is displayed, but if i do return RedirectToAction (as above), it loses the Model errors. I'm not surprised by the issue, just wondering how you guys handle this? I could of course just return the same View instead of the redirect, but i have logic in the "Create" method which populates the view data, which i'd have to duplicate. Any suggestions?

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  • httpCookie cause the page not to load

    - by jvcoach23
    I'm using VS 2010, vb.net and asp 3.5. I have a simple default.aspx page that has Dim ctx As HttpContext = HttpContext.Current Dim cookie As HttpCookie = ctx.Request.Cookies("SessionGUID") Me.lbl1.Text = cookie.Value.ToString the page loads fine when running it from within VS, but when i build the site and run the page, it doesn't load.. it doesn't give me an error, but nothing shows up. This is what the view source looks like HTMLHEAD META content="text/html; charset=windows-1252" http-equiv=Content-Type/HEAD BODY/BODY/HTML I took out the < in the tags so that it would display here... If i take out the Me.lbl1.Text = cookie.Value.ToString the page loads fine.. All i'm putting to the page is some text and the label control. anyone have any ideas

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  • show output of file on client side using jquery + javascript .

    - by tazimk
    Hi, Written some code in my view function : This code reads a file from server . stores it in a list .passes to client def showfiledata(request): f = open("/home/tazim/webexample/test.txt") list = f.readlines() return_dict = {'list':list} json = simplejson.dumps(list) return HttpResponse(json,mimetype="application/json") On, client side the $.ajax callback function receives this list of lines. Now, My Question is . I have to display these lines in a textarea. But these lines should not be displayed at once . Each line should be appended in textarea with some delay. (Use of setInterval is required as per my knowledge) . Also I am using jquery in my templates. The server used is Django . Please provide some solution as in some sample code will be quite helpful .

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  • Get last element of pipeline in powershell

    - by dozacinc
    Hi, This might be weird, but stay with me. I want to get only the last element of a piped result to be assigned to a varaiable. I know how I would do this in "regular" code of course, but since this must be a one-liner. More specifically, I'm interested in getting the file extension when getting the result from an FTP request ListDirectoryDetails. Since this is done within a string expansion, I can't figure out the proper code. Currently I'm getting the last 3 hars, but that is real nasty. New-Object PSObject -Property @{ LastWriteTime = [DateTime]::ParseExact($tempDate, "MMM dd HH:mm",[System.Globalization.CultureInfo]::InvariantCulture) Type = $(if([int]$tempSize -eq 0) { "Directory" } else { $tempName.SubString($tempName.length-3,3) }) Name = $tempName Size = [int]$tempSize } My idea was doing something similar to $tempName.Split(".") | ? {$_ -eq $input[$input.Length-1]} that is, iterate over all, but only take out where the element I'm looking at is the last one of the input-array. What am I missing ? Fire at will /M

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  • How do I dynamically load a js file using Prototype?

    - by domagoj412
    Hello, I am using prototype to load external js file (actually it is php file) dynamically. Like this: function UpdateJS(file) { var url = 'main_js.php?file='+file; var myAjax = new Ajax.Request( url, {method: 'get', onComplete: showResponseHeader} ); } function showResponseHeader (originalRequest) { $('jscode').innerHTML = originalRequest.responseText; } Container "jscode" is defined like this: <script type="text/javascript" id="jscode"></script> And it works! But if some different file is called, all the functions from previous one are preserved. And I don't want that. Anybody knows how to "unload" first js file when second one is called? (I also tried using Ajax.Updater function but the result is the same.) Update: It turns out that there is bigger problem: it only loads if function "UpdateJS" is in window.onload that is why it doesn't load anything else after that. So prototypes update it's maybe not such a good way for this...

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  • Why a thread is aborted in ASP.NET MVC (again)?

    - by Dario Solera
    Here is what I do in a controller action: create and start a new Thread that does a relatively long processing task (~30 seconds on average, but might be several minutes) immediately return the page response so the user knows processing has started (trivially, a Json with a task ID for polling purposes). At some random point, ThreadAbortException is thrown, so the async task does not complete. The exception is not thrown every time, it just happens randomly roughly 25% of the times. Points to note: I'm not calling Response.End or Response.Redirect - there isn't even a request running when the exception is thrown I tried using ThreadPool and I got the same behavior I know running threads in ASP.NET has several caveats but I don't care right now Any suggestion?

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  • LinkDemand error on webserver when using TrackSource

    - by robertpnl
    Hi, On a webserver (shared hosting provider) I published a website with a ADO.Net Framework model in use with MySql Connector 6.3.1. When I request a page, a Security Exception will be happen with this error messages: "LinkDemand The type of the first permission that failed was: System.Security.Permissions.SecurityPermission The Zone of the assembly that failed was: MyComputer ". This exception raised when code collect the listeners of a tracksource: public class MySqlTrace { private static TraceSource source = new TraceSource("mysql"); static MySqlTrace() { foreach (TraceListener listener in source.Listeners) // <-- Exception throw here { // ... } } } The web.config doesn't have any trace data or system.diagnostics. My question is, why will a get a LinkDemand security exception during collecting the source listeners. What can maybe be wrong in here?

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  • How are a session identifiers generated?

    - by Asaf R
    Most web applications depend on some kind of session with the user (for instance, to retain login status). The session id is kept as a cookie in the user's browser and sent with every request. To make it hard to guess the next user's session these session-ids need to be sparse and somewhat random. The also have to be unique. The question is - how to efficiently generate session ids that are sparse and unique? This question has a good answer for unique random numbers, but it seems not scalable for a large range of numbers, simply because the array will end up taking a lot of memory.

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  • Printing and exporting from Crystal Reports Viewer throws error

    - by MAW74656
    I'm using the .net Crystal Reports viewer to display a report. This works properly, but when I click on the print option, and then click "OK" on the options popup, I get the following error: Access is denied. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Runtime.InteropServices.COMException: Access is denied. And the same thing when I try to export. I'm running this on the Visual Studio development server, VS2008. What can I do to correct this?

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  • How does browser work with expiration headers, cache-control headers, last-modified-header ?

    - by Umair
    I am a web developer, have worked with PHP and .NET both. having over a year of experience working on web I haven't been able to understand the browser caching features thoroughly, I hope Web Gurus here can help me with it. Questions I have in my mind are : How does browser actually caches stuff, does it request for to see if the cached file has changed on the server or not, What is the Ideal way for a developer to make use of browser chaching to its full, but also to be able to push new changes on the site with no hassle at all. I think if browser somehow chaches my CSS and JS and Images, and then just makes a checks for their modification to the server everytime, this can sort the issue. but I am not sure how to do it, waiting for interesting answers :)

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  • Design Stock Server Application in C++

    - by Avinash
    [Queston asked in ML Interview] Design an server/application which handle multiple incoming stock information ( stock symbol and values ) Server need to store the information in some cache ( need to design the data structure ), There are multiple client connected to server using tcp/ip socket. They will subscribe to particular request say stock symbol XYZ , and may be for more then one. As and when there is change the stock symbol server should broadcast the information to subscribed client. If tcp/ip write failed, server should handle the unregistration of the client. What various data structures will be used and how threading model will be ?

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  • Newbie question on MvcContrib TestHelpers

    - by Simon Lomax
    Hi, I'm just starting to use the TestHelpers in MvcContrib. I want to try and test an action method on my controller that itself tests if IsAjaxRequest() is true. I've used the same code that is shown in the TestHelper samples to set up the TestControllerBuilder _controller = new StarsController(); _builder = new TestControllerBuilder(); _builder.InitializeController(_controller); So that _controller has all the faked/mocked HttpContext inside it, which is really great. But what do I do now to force IsAjaxRequest() on the internally faked Request object to return true?

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  • Can I expose MySQL data using PHP and OData?

    - by user359796
    As I understand it, OData is just a standardized way to expose relational data RESTfully. If I've got a PHP application, it should be able to process those RESTful requests and manipulate a MySQL database based on the request data and then return an ATOM feed. First, are the preceeding statements correct? Second, does a PHP library to do this already exist or would I have to create my own? If I have completely misunderstood these technologies and my question doesn't make sense, please feel free to let me know.

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  • Uploading files to server

    - by Shivkumar
    I am trying to upload a file from my Windows application to the server into a particular Folder using C#. However, I am getting an exception: "An exception occurred during a WebClient request". Here is my code: for (int i = 0; i < dtResponseAttach.Rows.Count; i++) { string filePath = dtResponseAttach.Rows[i]["Response"]; WebClient client = new WebClient(); NetworkCredential nc = new NetworkCredential(); Uri addy = new Uri("http://192.168.1.4/people/Attachments/"); client.Credentials = nc; byte[] arrReturn = client.UploadFile(addy, filePath); Console.WriteLine(arrReturn.ToString()); } What could be the reason for this exception?

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  • Multimedia content in REST responce(XML/JSON)

    - by Koushik
    In my thesis I need to test different architectures. A request to a REST web service developed using Apache CXF and Spring MVC with MySQL as back end serving references(a field in database) to images,audio and video files stored in file system. In the response message, what is the best method to send the content to the client(another application using the service which I developed). URI: http://www.filmservices.com/film/{id} A client here is not the end user. Send the encoded hyperlink's(where the content is stored in the file system) to the client, so that the client renders the response and displays it to the browser. Use Base64 to encode the message(image,audio,video) and send it to the client. Main concern is performance.

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  • Redirect failing - "...will never complete"

    - by Carl
    I am trying to redirect a blog page to a newly updated page. The old entry is gone, but it is indexed in Google, and other people have links to it. I get this error: "The page isn't redirecting properly" "Firefox has detected that the server is redirecting the request for this address in a way that will never complete." The (deleted) link looks like this: "http://mysite.com/blog/?p=158" I want to redirect that to "http://mysite.com/blog/?p=194" I used CPANEL to do a permanent (301) redirect. (I have other redirects working.) I gues the ? is causing a problem. How do I fix it so the page redirects? (Please give instructions for CPANEL - the server has Frontpage extensions, and I don't bother with re-researching how to do it manually - the multiple files that need updated.)

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  • Analyzing Python Code: Modulus Operator

    - by Bhubhu Hbuhdbus
    I was looking at some code in Python (I know nothing about Python) and I came across this portion: def do_req(body): global host, req data = "" s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((host, 80)) s.sendall(req % (len(body), body)) tmpdata = s.recv(8192) while len(tmpdata) > 0: data += tmpdata tmpdata = s.recv(8192) s.close() return data This is then called later on with body of huge size, as in over 500,000 bytes. This is sent to an Apache server that has the max request size on the default 8190 bytes. My question is what is happening at the "s.sendall()" part? Obviously the entire body cannot be sent at once and I'm guessing it is reduced by way of the modulus operator. I don't know how it works in Python, though. Can anyone explain? Thanks.

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  • How can I return JSON from node.js backend to frontend without reloading or re-rendering the page?

    - by poleapple
    I am working with node.js. I want to press a search button, make some rest api calls to another server in the backend and return the json back to the front end, and reload a div in the front end so that I won't have to refresh the page. Now I know I can reload just a div with jQuery or just Javascript dom manipulation. But how do I make it call a method on the server side? I could have a submit button and it will make a post request and I can catch it and make my api calls from there, however from the node.js side, when I return, I will have to render the page again. How do I go about returning JSON from the back end to the front end without re-rendering or refreshing my page? Thanks.

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