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• Detect EXIF Orientation of an image in javascript

  - by Obi Wan

  In my mobile web application, I have a need to examine the EXIF orientation tag of an image file selected using an input type=file control, and this needs to be done on the client side in javascript, before the selected image file gets uploaded to the server. I have seen several threads similar to this but most of them say to use a library called binaryajax.js to be able to access the EXIF data from the file object. Unfortunately, simply including binaryajax.js in my project causes an Access Denied error in jQuery 1.7.1, and I have no idea why this is happening. This error precludes me from using this jquery library. So I am looking for a solution that does not use this library. Another library I have tried to use is jquery.exif.js and I also get an Access Denied Error Trying to use it.

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• ASP.NET MVC Model Binders, html id

  - by Stacey

  Using the Model Binders in ASP.NET MVC 2.0, you can do something like this... [DisplayName("User Name")] public string Name { get; set; } <%: Html.TextBoxFor( m => m.Name ) :%> and then in your HTML, you get a result like this.. <label for="UserName">User Name</label> <input type="text" id="UserName" name="UserName" /> That works fine, but I want to have better control over the HTML ID. Is there any way to do this through the model binding method?

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• Why can I check some event handlers for null, some not?

  - by Inno

  Hi, I have a ugly piece of code that adds event handlers. The problem is, if the code is called multiple times, the event handlers are called multiple times. To solve the problem, I remove the event handler first and then add it. Now I've seen the following behaviour: Some event handlers can be checked like: if (object.event == null) { // // Code // } others of the form if (object.object.event == null) { // // Code // } I get a message like 'object.object.event' may only occur left of -= or +=. (Since I'm using a german version of visual studio, I don't know the correct translation to english). I have no idea why the behaviour looks this inconsequent so I would be grateful for some information on this. To be more specific: It's user control. if (myControl.Event == null) { // // works // } if (myControl.TreeView.NodeMouseClick == null) { // // doesn't work // }

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• How to let users with required permission download a file via php?

  - by Yegor

  I have a php file that acts as a gatekeeper for all the files I want people to download, who ahve sufficient privilages. The code I use throw the file to the user is header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header("Content-disposition: attachment; filename=\"".$public_filename."\""); header("Content-Transfer-Encoding: Binary"); header('Expires: 0'); header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); header("Content-length: ".$f_filesize); readfile($file_path); Most files are fairly large.... 400mb-10GB. What would be a good way to do this, and keep the true locations + filenames secret, so people cant just link to the files directly, but HAVE to link thru my download.php?file=ID gatekeeper? Thanks

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• Rails gives wrong headers after upgrade 2.3.5 -> 2.3.8

  - by macsniper

  I just upgraded from rails 2.3.5 to rails 2.3.8, but now my redirects are not working properly. I get the following as the response HTTP Headers: HTTP/1.1 302 Moved Temporarily Date: Wed, 02 Jun 2010 09:40:39 GMT Content-Length: 93 Content-Type: text/html whereas I got previous: HTTP/1.1 302 Moved Temporarily Connection: close Date: Wed, 02 Jun 2010 09:41:18 GMT Set-Cookie: _session_id=<correct id>; path=/ Status: 302 Found Location: <correct url> Cache-Control: no-cache Server: Mongrel 1.1.5 Content-Type: text/html; charset=utf-8 Content-Length: 93 Anyone knows how to fix this? Despite the fact that the redirect is not working, the login-cookie is not set too (but I think, this is both related somehow). I have already tried to override redirect_to in order to set response.headers['Location'] etc., but they did not appear in the response.

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• Silverlight Windows Phone 7: Load Images From URL

  - by Lennie De Villiers

  Hi, I got the code below that is trying to load an image from the web into an Image control, when I run it I get an error on the given line that no network access is allowed: private void button1_Click(object sender, RoutedEventArgs e) { WebClient webClientImgDownloader = new WebClient(); webClientImgDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(webClientImgDownloader_OpenReadCompleted); webClientImgDownloader.OpenReadAsync(new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute)); } void webClientImgDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e) { BitmapImage bitmap = new BitmapImage(); bitmap.SetSource(e.Result); // ERROR HERE! image1.Source = bitmap; } Silverlight for Windows Phone 7

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• Sharing Eclipse directory on Dropbox between Windows and Mac OS X

  - by sowbug

  This question was close to mine, but not quite. I have a Windows desktop and a MacBook Pro. I'd like to be able to keep my Eclipse workspace in my Dropbox folder. The problem is that many project settings change between platforms: references to JREs, JDKs, and other libs. Every discussion I've seen of this problem seems to suggest taking advantage of the source control system's ignore functionality, so that such-and-such file remains local-only and thus able to remain platform-specific. But when you're working with a real single shared folder, that class of solution doesn't apply. Have you had luck working with a Java Eclipse project living in a single folder shared over the network, cross-platform?

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• Text property in a UserControl in C#

  - by yeyeyerman

  I have a control with a inner TextBox. I want to make a direct relationship between the Text property of the UserControl and the Text property of the TextBox. The first thing I realized is that Text was not being displayed in the Properties of the UserControl. Then I added the Browsable(true) attribute. [Browsable(true)] public override string Text { get { return m_textBox.Text; } set { m_textBox.Text = value; } } Now, the text will be shown for a while, but then is deleted. This is because the information is not written within the xxxx.Designer.cs. How can this behviour be changed?

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• Feedback on availability with Google App Engine

  - by Ron

  We've had some good experiences building an app on Google App Engine, this first app's target audience are Google Apps users, so no issues there in terms of it being hosted on Google infrastructure. We like it so much that we would like to investigate using it for a another app, however this next project is for a client who is not really that interested in what technology it sits on, they just want it to work, and work all of the time. In this scenario, given that we have the technology applicability and capability side covered, are there any concerns that this stuff is still relatively new and that we may not be as much "in control" as if we had it done with traditional hosting?

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• Why isn't a JS file hosted on Amazon S3 getting cached by the browser?

  - by Paras Chopra

  I have a JS file hosted on Amazon S3 (http://s3.amazonaws.com/wingify/vis_opt.js). I want the file to be cached on users' browsers so that they don't have to download it with every page view. However, in spite of setting Cache Control header I don't think it is getting cached. Browser still contacts Amazon Server with every pageview. Here is the example of page where this script is embedded: http://myjugaad.in/ If you have Firebug, you will be able to see that browser requests it with every pageview. What can I do so that the file gets permanently cached? Thanks for help.

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• Tie destruction of an object (sealed) to destruction of an unmanaged buffer

  - by testtestSO

  I'll explain my situation first: I'm interested of using the Bitmap constructor that takes scan0, stride and format, because I'm decoding tiled images and I'd like to choose my own stride so I can decode the tiles without caring about the bounds in the decoder part. Anyway, the problem is that the documentation says: The caller is responsible for allocating and freeing the block of memory specified by the scan0 parameter. However, the memory should not be released until the related Bitmap is released. I can't release the buffer easily, because the Bitmap is then passed to another class that will eventually destroy it and I don't have control over it. Is there some way (hacky, I know) to tell the GC to also release my buffer when the Bitmap is destroyed? (Also, any alternative solution is welcome).

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• How to leave out some System.out/logging statements while executing java code?

  - by iamrohitbanga

  In C++ if we do not want some statements to compile into code that ships like assert function calls, we control their compilation through #ifndef preprocessor directives. How do we do this in Java? I have some System.out.println() statements for debugging which I would like to remove for the final code. one way is to make them execute conditionally under the affect of a boolean variable. Is there a better way of doing this? As I have a java swing application I can turn off the System.out.println statements without affecting the output. What is the method of doing this?

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• how to show data on mouse over in datagrid

  - by prince23

  hi, i have an Datagrid lets say i have columns with name, age, mail ID. so all the details should be shown in a pop up or some thing like side also will do. is there any thing like an slide control so that once i make a mouse over the row i display that row values in silde? i need to show an pop up with details what i have displayed in that row. how can i achive this functionality here. right now binding values to datagrid is done this functioanlity is done. how can i go ahead to get an solution to show pop up on mouse over. any help on this issue would be really great and help fully. i am new to silver light concept plz provide an solution on this. thanks in advance prince

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• securing a webservice for use from a custom iphone app only

  - by mme

  I want to create an iphone application which consists of two parts: The app itself and a server side component. On a users request, the app sends data to the server which is to be handled by human operators. To prevent abuse from an iphone app user, the id of the iphone is sent along with the request, and the operators can blacklist pranksters to deny their iphone access to the service. So far so good. Now the problem is: Someone could easily discover the address of the serverside component, and write a script to send bogus requests, using multiple IP addresses etc. So my question is: how can I defend myself against this? Captchas to protect against scripted attacks or requiring the user to register himself are not an option for this particular application. If I had control of the download, I would associate a unique ID with each downloaded app, but obviously this is not an option with the appstore. What would be your approach to make the server side part more secure?

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• How to show a window that acts like a popup menu?

  - by Edwin

  Hi, When window A is show, I want to show another none-modal popup window B, but: I don't want window A to become inactive due to window B becomes the front window; I want that when window B is focused, I pull down a combo box control on window A with one click (generally you have to click twice, one for moving the focus to window A and the second for pulling down the combo box); As you can see, the window B that I want is something like a more usable popup window like a popup menu (which is less a obstacle than a general none-modal window when you want it to get away by clicking on any other part of the parent window). Am I clear on my question? Thank you.

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• How to check that a regular expression fall into infty loop or not?

  - by Sorush Rabiee

  I'm trying to learn and hopefully use regular expression with Qt. I found that some patterns cause handler to fall into loop. for example searching \b\b in a text, never will terminate. and number of these expressions is infinite (\b\b\b,\b\b\b\b and so on). I'd like to determine and control all invalid expressions. Is there an algorithm to distinguish valid and invalid expressions? If not, how can I prevent my program from falling into an infinite loop?

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• Fake Template Engine php

  - by user1464822

  i got an idea for making php template engine fast and user friendly but i'm not sure if it's good or bad. the idea is to create a fake template engine: creating a template editor in control panel that let user see something like this: <html> <head> <title>{title}</title> </head> <body> {content} </body> </html> what the editor actually does is to replace all php code like <?php echo $this->title; ?> to user friendly {title} but it's not really replacing it just in the view when the user save the template the template actually saved as fast pure php template. the question is this a good idea or bad ? your answers is highly appreciated.

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• How to close IOs?

  - by blackdog

  when i managed IO, i found a problem. i used to close it like this: try { // my code } catch (Exception e) { // my code } finally{ if (is != null) { is.close(); } } but the close method also would throw exception. if i have more than one IO, i have to close all of them. so the code maybe like this: try { // my code } catch (Exception e) { // my code } finally{ if (is1 != null) { is1.close(); } if(is2 != null{ is2.close(); } // many IOs } if is1.close() throws an exception, is2, is3 would not close itself. So i have to type many try-catch-finally to control them. is there other way to solve the problem?

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• PHP cors validation

  - by Brian Putt

  I have an endpoint that takes GET requests to collect data from any source that wants to send data. Is there a way to run some validation that the data is in fact coming from the sources we allowed? They enter the website url that they will be sending the data from and we generate an api key. The data is sent via a javascript file that they install onto their website. I have the Access-Control-Allow-Origin set to * as it doesn't necessarily scale to add in hundreds or more websites to that header and that in itself is a security risk as it shows anyone who wants to look at the headers who uses the script. Currently I am thinking of using the http_origin / origin referrer, but obviously that doesn't do too much

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• Accessing controls created dynamically (c#)

  - by Aliens

  In my code behind (c#) I dynamically created some RadioButtonLists with more RadioButtons in each of them. I put all controls to a specific Panel. What I need to know is how to access those controls later as they are not created in .aspx file (with drag and drop from toolbox)? I tried this: foreach (Control child in panel.Controls) { Response.Write("test1"); if (child.GetType().ToString().Equals("System.Web.UI.WebControls.RadioButtonList")) { RadioButtonList r = (RadioButtonList)child; Response.Write("test2"); } } "test1" and "test2" dont show up in my page. That means something is wrong with this logic. Any suggestions what could I do?

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• WPF Binding to Items within a collection? (or converter with parameters)

  - by Sonic Soul

  i am using a WPF DataGrid, and in my Details row, i would like to show separate objects within a sub collection of each grid item. Is it possible to have a finer control of Path? for example something like... Path=SubCollection['ItemX'] etc.. also, if i was to use a converter, i don't want to have to create a separate converter for each item.. so would there be a way to supply a parameter to a converter that could than determine which collection item to return??

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• Is this plain stupid: GIT Sharing Via DropBox?

  - by yar

  I realize that there are similar questions, but my question is slightly different. I'm wondering whether sharing a bare repository via a synchronized DropBox folder on multiple computers would work for sharing code via GIT. Really what I want to know is: is sharing a GIT repo via DropBox (the repo gets updated on each person's local drive) the same as sharing it from one centralized location, e.g., via SSH, git or HTTP? Is this the same or different from sharing a GIT repo via a shared network drive? Note: This is not an empirical question: it seems to work fine. I'm asking whether the way a GIT repo is structured is compatible with this way of sharing. EDIT To clarify/repeat, I'm talking about keeping the GIT repository on DropBox as a bare repository. I'm not talking about keeping the actual files that are under source control in DropBox.

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• SQL Server Reporting Services using of pictures with dynamic links

  - by YvesR

  I have setup a SSRS 2008 and building reports. So far so good. Now there is a picture control in SSRS where you can set the picture as external link reference. There you can choose to use a link. When I use a weblink (http://anyurl/download_picture.aspx?id=123) it dont' work for me. Calling the url in the web browser (all tested IE, Safari, Chrome, FF) the pictures is delivered, Header is ok, content type, too. Does it work in general in SSRS ? Or do I have to copy the picture to a temp folder and link the url like http://anyurl/mypicture.jpg.

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• Is there any way to disable the "double-click to copy" functionality of a .NET label?

  - by DavidCarroll

  This is really annoying. I'm using the label as part of a list item user control, where the user can click it to select the list item and double-click it to rename it. However, if you had a name in the clipboard, double-clicking the label will replace it with the text of the label! I've also check the other labels in the application, and they will also copy to the clipboard on a doubleclick. I have not written any clipboard code in this program, and I am using the standard .NET labels. Is there any way to disable this functionality?

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• Why does coffeescript generate classes like this?

  - by ryeguy

  Given the following coffeescript code: class Animal constructor: (@name) -> speak: (things) -> "My name is #{@name} and I like #{things}" This is generated: var Animal = (function() { function Animal(name) { this.name = name; } Animal.prototype.speak = function(things) { return "My name is " + this.name + " and I like " + things; }; return Animal; })(); But why isn't this more idiomatic code generated? var Animal = function Animal(name) { this.name = name; }; Animal.prototype.speak = function(things) { return "My name is " + this.name + " and I like " + things; }; I know that coffeescript wraps a lot of stuff in anonymous functions to control scope leak, but what could leak here?

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