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• Mapping parent-child relationships with iBatis

  - by agnul

  I have the classic setup public class Parent { Integer id; ... // No generics Collection someCollectionAttribute; ... public void setChildren(Collection c) { ... } } public class Child { Integer id; ... } and I'm trying to map this on the usual table setup using iBatis (version 2.30... don't ask). create table parents ( ID integer primary key ... ) create table children ( ID integer primary key PARENT_ID integer references parents(id) ... ) My mapping file looks like this <resultMap id="ParentResult" groupBy="id"> <result property="id" column="ID" /> ... <result property="children" resultMap="ChildResult" /> </resultMap> <resultMap id="ChildResult"> <result property="id" column="ID" /> <result property="parentId" column="PARENT_ID" /> ... </result> <sql id="loadParent" resultMap="ParentResult"> select P.ID as p1, ..., C.ID as c1, C.PARENT_ID as c2 ... from parents P join children C on (P.ID = C.PARENT_ID) where P.ID = #id# order by P.ID </sql> Doing the usual sqlMap.queryForObject("loadParent", new Integer(42)) at first caused a NullPointerException inside the setChildren setter which apparently is called with a null argument (my bad). Fixing the setter everything works fine, but the logs show that setChildren is called only once before even running a single SQL statement, still with a null argument, so I'm wondering what's going on here. Anyone has any clues?

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• Simple Xml list parsing problem

  - by Hubidubi

  I have this xml: <root> <fruitlist> <apple>4</apple> <apple>5</apple> <orange>2</orange> <orange>6</orange> </fruitlist> </root> I'm writing a parser class, although I can't figure out how to deal with multiple node types. I can easily parse a list that contains only one node type (eg. just apples, not oranges) @ElementList(name = "fruitlist") private List<Apple> exercises; with more than one node type it also wants so parse non Apple nodes which doesn't work. I also tried to make another list for oranges, but it doen't work, I can't use fruitlist name more than once. @ElementList(name = "fruitlist", entry = "orange") private List<Orange> exercises; The ideal would be two seperate list for both node types. Hubi EDIT: After more searching & fiddling this question is a duplicate: Inheritance with Simple XML Framework

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• Can I copy the CollapsiblePanelExtender in jQuery as one method?

  - by Matthew Jones

  I am beginning the process of moving away from the AjaxControlToolkit and toward jQuery. What I want to do is have one function that duplicates the functionality of the CollapsiblePanelExtender. For a particular set of hyperlink and div, the code looks like this: $('#nameHyperLink').click(function() { var div = $('#nameDiv'); var link = $('#nameHyperLink'); if (div.css('display') == 'none') { link.text('Hide Data'); div.show(400); } else { link.text('Show Data'); div.hide(400); } }); What I really want to do is only have to write this function once, then use it for many (approx 40) instances throughout my website. Ideally what I want is this: function showHidePanel(divID,linkID,showText,hideText){ var div = $(divID); var link = $(linkID); if (div.css('display') == 'none') { link.text('Hide Data'); div.show(400); } else { link.text('Show Data'); div.hide(400); } }); I would then call this function from every HyperLink involved using OnClientClick. Is there a way to do this?

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• Indy Write Buffering / Efficient TCP communication

  - by Smasher

  I know, I'm asking a lot of questions...but as a new delphi developer I keep falling over all these questions :) This one deals with TCP communication using indy 10. To make communication efficient, I code a client operation request as a single byte (in most scenarios followed by other data bytes of course, but in this case only one single byte). Problem is that var Bytes : TBytes; ... SetLength (Bytes, 1); Bytes [0] := OpCode; FConnection.IOHandler.Write (Bytes, 1); ErrorCode := Connection.IOHandler.ReadByte; does not send that byte immediately (at least the servers execute handler is not invoked). If I change the '1' to a '9' for example everything works fine. I assumed that Indy buffers the outgoing bytes and tried to disable write buffering with FConnection.IOHandler.WriteBufferClose; but it did not help. How can I send a single byte and make sure that it is immediatly sent? And - I add another little question here - what is the best way to send an integer using indy? Unfortunately I can't find function like WriteInteger in the IOHandler of TIdTCPServer...and WriteLn (IntToStr (SomeIntVal)) seems not very efficient to me. Does it make a difference whether I use multiple write commands in a row or pack things together in a byte array and send that once? Thanks for any answers! EDIT: I added a hint that I'm using Indy 10 since there seem to be major changes concerning the read and write procedures.

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• cant show MBProgressHUD

  - by dejoong

  In here said that using MBProgressHUD is easy. But i cant make it. Here my code: - (IBAction)save{ HUD = [[MBProgressHUD alloc] initWithView:self.navigationController.view]; [self.navigationController.view addSubview:HUD]; HUD.delegate = self; [HUD show:YES]; NSString *title = [page stringByEvaluatingJavaScriptFromString:@"document.title"]; SavePageAs *savePage = [[SavePageAs alloc] initWithUrl:self.site directory:title]; [savePage save]; [HUD hide:YES]; } the progress indicator not show during [savePage save] method run, but show after the page completely saved (the indicator show for less than 1 second). I also tried this way: - (IBAction)save { HUD = [[MBProgressHUD alloc] initWithView:self.navigationController.view]; [self.navigationController.view addSubview:HUD]; HUD.delegate = self; HUD.labelText = @"Saving..."; [HUD showWhileExecuting:@selector(performFetchOnMainThread) onTarget:self withObject:nil animated:YES]; } - (void) savingPage{ NSString *title = [page stringByEvaluatingJavaScriptFromString:@"document.title"]; SavePageAs *savePage = [[SavePageAs alloc] initWithUrl:self.site directory:title]; [savePage save]; } -(void) performFetchOnMainThread { [self performSelectorOnMainThread:@selector(savingPage) withObject:nil waitUntilDone:YES]; } but still no luck. Anyone let me know where im lack here?? P.S [savePage save] is saving all website contents to local directory. I wish once the saving is complete the progressHUD disappear. Thanks

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• Proper way to implement IXmlSerializable?

  - by Greg

  Once a programmer decides to implement IXmlSerializable, what are the rules and best practices for implementing it? I've heard that GetSchema() should return null and ReadXml should move to the next element before returning. Are these true? And what about WriteXml: should it write a root element for the object or is it assumed that the root is already written? How should child objects be treated and written. Here's a sample of what I have now. I'll update it as I get good responses. public class Calendar: IEnumerable<Gvent>, IXmlSerializable { public XmlSchema GetSchema() { return null; } public void ReadXml(XmlReader reader) { if (reader.MoveToContent() == XmlNodeType.Element && reader.LocalName == "Calendar") { _Name = reader["Name"]; _Enabled = Boolean.Parse(reader["Enabled"]); _Color = Color.FromArgb(Int32.Parse(reader["Color"])); if (reader.ReadToDescendant("Event")) { while (reader.MoveToContent() == XmlNodeType.Element && reader.LocalName == "Event") { var evt = new Event(); evt.ReadXml(reader); _Events.Add(evt); } } reader.Read(); } } public void WriteXml(XmlWriter writer) { writer.WriteAttributeString("Name", _Name); writer.WriteAttributeString("Enabled", _Enabled.ToString()); writer.WriteAttributeString("Color", _Color.ToArgb().ToString()); foreach (var evt in _Events) { writer.WriteStartElement("Event"); evt.WriteXml(writer); writer.WriteEndElement(); } } } public class Event : IXmlSerializable { public XmlSchema GetSchema() { return null; } public void ReadXml(XmlReader reader) { if (reader.MoveToContent() == XmlNodeType.Element && reader.LocalName == "Event") { _Title = reader["Title"]; _Start = DateTime.FromBinary(Int64.Parse(reader["Start"])); _Stop = DateTime.FromBinary(Int64.Parse(reader["Stop"])); reader.Read(); } } public void WriteXml(XmlWriter writer) { writer.WriteAttributeString("Title", _Title); writer.WriteAttributeString("Start", _Start.ToBinary().ToString()); writer.WriteAttributeString("Stop", _Stop.ToBinary().ToString()); } }

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• Status of Data in Rollback of Large Transaction in SQL Server

  - by Lloyd Banks

  I have a data warehousing procedure that downloads and replaces dozens of tables from a linked server to a local database. Every once in a while, the code will get stuck on one of the tables on the linked server because the table on the linked server is in a state of transition. I am under the assumption that since the entire procedure is considered one transaction commit, when the procedure gets stuck, none of the changes made by the procudure so far would have committed. But the opposite seems to be true, tables that were "downloaded" before the procedure got stuck would have been updated with today's versions on the local server. Shouldn't SQL Server wait for the entire procedure to finish before the changes are durable? CREATE PROCEDURE MYIMPORT AS BEGIN SET NOCOUNT ON IF EXISTS (SELECT * FROM INFORMATION.SCHEMA.TABLES WHERE TABLE_NAME = 'TABLE1') DROP TABLE TABLE1 SELECT COLUMN1, COLUMN2, COLUMN3 INTO TABLE1 FROM OPENQUERY(MYLINK, 'SELECT COLUMN1, COLUMN2, COLUMN3 FROM TABLE1') IF EXISTS (SELECT * FROM INFORMATION.SCHEMA.TABLES WHERE TABLE_NAME = 'TABLE2') DROP TABLE TABLE2 SELECT COLUMN1, COLUMN2, COLUMN3 INTO TABLE2 FROM OPENQUERY(MYLINK, 'SELECT COLUMN1, COLUMN2, COLUMN3 FROM TABLE2') --IF THE PROCEDURE GETS STUCK HERE, THEN CHANGES TO TABLE1 WOULD HAVE BEEN MADE ON THE LOCAL SERVER WHILE NO CHANGES WOULD HAVE BEEN MADE TO TABLE3 ON THE LOCAL SERVER IF EXISTS (SELECT * FROM INFORMATION.SCHEMA.TABLES WHERE TABLE_NAME = 'TABLE3') DROP TABLE TABLE3 SELECT COLUMN1, COLUMN2, COLUMN3 INTO TABLE3 FROM OPENQUERY(MYLINK, 'SELECT COLUMN1, COLUMN2, COLUMN3 FROM TABLE3') END

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• Assistance with building an inverted-index

  - by tipu

  It's part of an information retrieval thing I'm doing for school. The plan is to create a hashmap of words using the the first two letters of the word as a key and any words with the two letters saved as a string value. So, hashmap["ba"] = "bad barley base" Once I'm done tokenizing a line I take that hashmap, serialize it, and append it to the text file named after the key. The idea is that if I take my data and spread it over hundreds of files I'll lessen the time it takes to fulfill a search by lessening the density of each file. The problem I am running into is when I'm making 100+ files in each run it happens to choke on creating a few files for whatever reason and so those entries are empty. Is there any way to make this more efficient? Is it worth continuing this, or should I abandon it? I'd like to mention I'm using PHP. The two languages I know relatively intimately are PHP and Java. I chose PHP because the front end will be very simple to do and I will be able to add features like autocompletion/suggested search without a problem. I also see no benefit in using Java. Any help is appreciated, thanks.

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• C# Wholesale Order form - textboxes in Gridviews in Repeater

  - by tnriverfish

  I'm building a wholesale order form on a website. The current plan is to... -get an ArrayList of DepartmentUnits -a DepartmentUnit has various attributes like "deptId", "description" and its own ArrayList of StoreItems -The StoreItems have attached ArrayList of various SizeOptions -The SizeOptions have an inventory count integer along with their description -Planning on putting an asp:Repeater on the page that has an asp:GridView in it -Each DepartmentUnit will have its own GridView -EachStore item will have a row in the GridView -Each SizeOption will have a TextBox in the row (approximately 10 options) -Each inventory count will be watermarked over the size option textbox The question becomes how will I then collect all this information correctly once the form has been filled out? I don't like the idea of putting all this information in an update panel and then posting back each time a GridView row or worse one of the row's textboxes changes. Any advice on putting a single save button on the page and looping through each Repeater item - and each GridViewRow - and each textbox - to get all the values entered? Better to try collecting all the items added in a single table at the bottom of the page and updating the string with jquery each time a text box is modified? Then just looping through the new table when saved? Not sure I know how to loop through that table though - updating if quantity is changed might be a bear too. If it considerably simplifies the process I could just remove the Repeater aspect and put separate GridViews on separate pages. Thanks!

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• Session variables with Cucumber Stories

  - by Matthew Savage

  I am working on some Cucumber stories for a 'sign up' application which has a number of steps. Rather then writing a Huuuuuuuge story to cover all the steps at once, which would be bad, I'd rather work through each action in the controller like a regular user. My problem here is that I am storing the account ID which is created in the first step as a session variable, so when step 2, step 3 etc are visited the existing registration data is loaded. I'm aware of being able to access controller.session[..] within RSpec specifications however when I try to do this in Cucumber stories it fails with the following error (and, I've also read somewhere this is an anti-pattern etc...): Using controller.session[:whatever] or session[:whatever] You have a nil object when you didn't expect it! The error occurred while evaluating nil.session (NoMethodError) Using session(:whatever) wrong number of arguments (1 for 0) (ArgumentError) So, it seems accession the session store isn't really possible. What I'm wondering is if it might be possible to (and I guess which would be best..): Mock out the session store etc Have a method within the controller and stub that out (e.g. get_registration which assigns an instance variable...) I've looked through the RSpec book (well, skimmed) and had a look through WebRat etc, but I haven't really found an answer to my problem... To clarify a bit more, the signup process is more like a state machine - e.g. the user progresses through four steps before the registration is complete - hence 'logging in' isn't really an option (it breaks the model of how the site works)... In my spec for the controller I was able to stub out the call to the method which loads the model based on the session var - but I'm not sure if the 'antipattern' line also applies to stubs as well as mocks? Thanks!

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• Invalid security validation exception inside a SharePoint workflow

  - by Dan Revell

  I'm having a strange security problem with a SharePoint workflow. Particular calls seem to result in the following exception: Microsoft.SharePoint.SPException: The security validation for this page is invalid. I've come across this error before and the simple fix is web.AllowUnsafeUpdates = true; ... web.AllowUnsafeUpdates = false; However I've never once encountered this problem inside a workflow before since a workflow runs as system. I first got this error in a code activity where I set the value of a column on the list item. Wrapping the item.Update in AllowUnsafeUpdates fixed it. After the code activity I have a CreateTask activity. This also causes the same error but only after running the code inside the activity's MethodInvoking. In both cases there's a SPListItem.UpdateItem involved within the stack trace. This call is failing a security check. I don't know anything about how this check works so I don't know where to look next. This is a strange one, because this SharePoint dev machine has been working fine for some time. No other projects or workflows exhibit this behaviour so that rules out an installation problem. There's just something about this particular workflow. [UPDATE] I've gotten around the issue by just creating a new project and building it up again. I still have the broken one and I'd still like to figure out the problem with it. I'd appreciate any suggestions of what it might be.

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• C#: WebBrowser.Navigated Only Fires when I MessageBox.Show();

  - by tsilb

  I have a WebBrowser control which is being instantiated dynamically from a background STA thread because the parent thread is a BackgroundWorker and has lots of other things to do. The problem is that the Navigated event never fires, unless I pop a MessageBox.Show() in the method that told it to .Navigate(). I shall explain: ThreadStart ts = new ThreadStart(GetLandingPageContent_ChildThread); Thread t = new Thread(ts); t.SetApartmentState(ApartmentState.STA); t.Name = "Mailbox Processor"; t.Start(); protected void GetLandingPageContent_ChildThread() { WebBrowser wb = new WebBrowser(); wb.Navigated += new WebBrowserNavigatedEventHandler(wb_Navigated); wb.Navigate(_url); MessageBox.Show("W00t"); } protected void wb_Navigated(object sender, WebBrowserNavigatedEventArgs e) { WebBrowser wb = (WebBrowser)sender; // Breakpoint HtmlDocument hDoc = wb.Document; } This works fine; but the messagebox will get in the way since this is an automation app. When I remove the MessageBox.Show(), the WebBrowser.Navigated event never fires. I've tried supplanting this line with a Thread.Sleep(), and by suspending the parent thread. Once I get this out of the way, I intend to Suspend the parent thread while the WebBrowser is doing its job and find some way of passing the resulting HTML back to the parent thread so it can continue with further logic. Why does it do this? How can I fix it? If someone can provide me with a way to fetch the content of a web page, fill out some data, and return the content of the page on the other side of the submit button, all against a webserver that doesn't support POST verbs nor passing data via QueryString, I'll also accept that answer as this whole exercise will have been unneccessary.

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• Fancybox "close" hangs/delays in IE7/8

  - by Kerri

  I'm having an issue with IE7/8 only on a development site: when closing the Fancybox, there is a major delay, sometimes about ten seconds or so, sometimes much longer (like a minute). Some things that might be relevant: • Using fancybox 1.3.1 • Works perfectly on all other browsers (FF, Safari, Opera, Chrome) • The loaded iframe contains a flash "virtual tour" • There are no errors reported in IE's Dev Toolbar or in DebugBar • The fancybox renders perfectly in IE, and after it has closed, there is not a problem loading it again. The closing seems to be the only issue. (That, and that it crashed the client's browser once, but I'm inclined to believe that had more to do with the content of the iframe than fancybox). I changed the link to the iFrame to something simpler (google), and it closed with no problem. So it does seem to have something to do with a conflict with the content of the iframe. The call: $("a#tourbox").fancybox({ "width": 750, "height" : 575, "autoScale": false, "type": "iframe" }); The HTML: <a id="tourbox" href="http://tour.circlepix.com/tour.htm?id=670335"><img src="sites/all/themes/removed/images/banquets-vtour.jpg" alt="Virtual Tour" /></a> Here's a link to the page with the problem: http://s93571.gridserver.com/banquets Click on the "Go to 360° Virtual Tour" image. Here's the page it loads: http://tour.circlepix.com/tour.htm?id=670335 I'd greatly appreciate any clues or ideas of what might be the issue. I couldn't find any other discussions with a similar problem. Thanks for any insights!

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• How does one get rid of fishy behavior in Windows?

  - by Tom Wijsman

  After I had boot my computer this morning there suddenly flooded water from the top of the screen, after which some fishes dropped into it. Now I can barely see what I am doing because the water distorts the view. Sometimes the fish follow the cursor so I need to move it away or wait for the fish to mind their own business. This makes it very annoying to use my system. What have I tried? Reboot the system. This caused the water to deplete from the desktop. Upon reboot, the screen was refilled with water and fishes. Attach another monitor. Same problem, fills that monitor as well and gives me extra fish. Clicking the fish. Makes them turn direction. Right clicking the fish. Changes color of the fish, not really useful. I'm locked out of changing the background or screen saver settings. Hence, I had to post the lady below... Safe mode doesn't save me from the fishes. It does give me another background there, but I can't screenshot easily. Other user accounts experience this as well. The Guest account seems to experience more fish than the other accounts. Using HijackThis, OTL Timekeeper List, Syninternal Autoruns, RootKitRevealer, ShellExView and similar tools I can't seem to find any entries that could be it, the Sysinternals tools show everything as verified. I'm suspecting this to be a driver problem. Randomly removing drivers doesn't seem to alleviate the problem. When removing the Graphics Drivers, it makes my screen black. While that could be considered the solution, it's not what I want. Changing the time / date settings does also not seem to affect the fishes. Changing the time a few years in the future, I would have expected the fishes to be dead. But, the same fishes are still there... They simply won't die! Tried to get used to them. They are really bothering me, looks like they require food. I don't know how to give them food, but apparently they get it elsewhere during reboot... Tried to disable my mouse pointer and use the keyboard. This works, they now swim around more randomly. They do put their attention to huge changes on the screen, so I need to type slow. Or otherwise I can't see what I'm tying exactly. Hold my laptop upside down. This seems to affect the water and fishes, but the water stays in the screen. They seem super resistant against water sickness and confusion though... What does the problem look like? What do I need? A way to get rid of these fishes on my screen forever, they are really annoying me a lot and I'm about to crack the screen to see if that makes them escape. Do you have any idea why this problem is occurring? What are my considerations? Buying an USB fish tank could make the fish leave the screen, I am uncertain though whether the fish could leave the screen through the USB cable. Using the FISh (programming language) which seems to provide EXPRESSIVE POWER and EFFICIENT EXECUTION, I can however not find any examples on how to remove fish. What are my Specifications? I'm using a Sony Vaio Fishy laptop. Sony VAIO VGN-Fishy, VAIO. Processor: 1337 MHz, Intel Core 2 Duo, T5432, 1 MB, Intel PM965 Express, 667 MHz. Memory: 1024 MB, DDR2-SDRAM, 667 MHz, 2 x 1024 MB, 4 GB. Disk Drive: 50 GB, Serial ATA, 5400 RPM. Storage Media: Memory Stick™, Memory Stick PRO™. Display: 15.4 ", 1280 x 800 pixels, LCD. Video: GeForce 8400M GT, 128 MB. Optical Drive: DVD±R/RW DL, 24 x, 24 x, 24 x, 6 x, 4 x, 6 x, 4 x, 5 x, 5 x, 8 x, 8 x, 8 x, 8 x, 6 x, 6 x, 24 x, 24 x, 24 x, 16 x. Camera: 1.3 MP, 30 fps. Networking: 2.0+EDR. Keyboard: Touchpad, AZERTY. Operating System/Software: Windows Vista Home Premium. Security: Kensington. Weight & Dimensions: 98.8 oz (2800 g), 14 " (355.8 mm), 10 " (254.4 mm), 0.98 " (24.9 mm). Other features: 100 BASE-TX/10 BASE-T, 802.11a/b/g/n/Draft n, V92/V.90, fishes. Plz! Help me...

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• When do married programmers find time to work?

  - by dave-keiture

  Hi people, Maybe my problem is unique (though I don't believe so), and probably I should go with it to the psychologist, but sinse I get married (~year ago) I feel that I don't have enough time to work anymore. For years I've been working at my day job doing regular stuff, and at nights I've been committing to the opensource projects, freelancing and self-educating. Now, I can't work at home at all, because once I start working, my wife either says that there're more important thing to do (walk out the dog, buy something in a grocery, etc.) or that I don't pay anough attention to her.. As a workaround, I've started getting up at 3-4AM in the morning to do the things I was usually doing nightly before. After a month of such schedule I feel myself totally crushed. So... 2 questions: Do you have the same problems, or I'm just a <..., who should say goodbye to programming, and start doing "really important things"? If you have the same problems, when do you find time to work? Maybe you know any cool lifehack or trick to spend at least some tome for doing the thing you like :) Best regards.

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• Inserting variable into routes - map.resources :posts, :as => X - is this possible?

  - by bgadoci

  Ok, so I am working on a blog application of sorts. Thus far, it allows for a user to sign up for their own account, create posts, tags, comments, etc. I have just implemented the ability to use www.myapp.com/brandon to set @user to find by username and therefore correctly display the users information at each url. So when you go to www.myapp.com/brandon you see all Brandon's posts, tags, and comments associated with those posts, etc. Works great. I'm implementing this URL mapping through the routes.rb file by adding the following: map.username_link '/:username', :controller => 'posts', :action => 'index' And then just setting the @user variable in the PostController and corresponding views to find_by_username. Now the issue is this. Once at www.myapp.com/brandon when you click on a post title, it sends to myapp.com/posts/id without the username in the URL. How do I tell rails to replace the /posts with /username. Is it even possible to insert the user_username variable into this code? map.resources :posts, :as => [what goes here]

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• Beginner video capture and processing/Camera selection

  - by mattbauch

  I'll soon be undertaking a research project in real-time event recognition but have no experience with the programming aspect of video capture (I'm an upperclassman undergraduate in computer engineering). I want to start off on the right foot so advice from anyone with experience would be great. The ultimate goal is to track events such as a person standing up/sitting down, entering/leaving a room, possibly even shrugging/slumping in posture, etc. from a security camera-like vantage point. First of all, which cameras/companies would you recommend? I'm looking to spend ~$100, more if necessary but not much. Great resolution isn't a must, but is desirable if affordable. What about IP network cameras vs. a USB type webcam? Webcams are less expensive, but IP cameras seem like they'd be much less work to deal with in software. What features should I look for in the camera? Once I've selected a camera, what does converting its output to a series of RGB bitmaps entail? I've never dealt with video encoding/decoding so a starting point or a tutorial that will guide me up to this point would be great if anyone has suggestions. Finally, what is the best (least complicated/most efficient) way to display video from the camera plus my own superimposed images (boxes around events in progress, for instance) in a GUI application? I can work on any operating system in any language. I have some experience with win32 GUIs and Java GUIs. The focus of the project is on the algorithm and so I'm trying to get the video capture/display portion of the app done cleanly and quickly. Thanks for any responses!!

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• REST API Best practice: How to accept as input a list of parameter values

  - by whatupwilly

  Hi All, We are launching a new REST API and I wanted some community input on best practices around how we should have input parameters formatted: Right now, our API is very JSON-centric (only returns JSON). The debate of whether we want/need to return XML is a separate issue. As our API output is JSON centric, we have been going down a path where our inputs are a bit JSON centric and I've been thinking that may be convenient for some but weird in general. For example, to get a few product details where multiple products can be pulled at once we currently have: http://our.api.com/Product?id=["101404","7267261"] Should we simplify this as: http://our.api.com/Product?id=101404,7267261 Or is having JSON input handy? More of a pain? We may want to accept both styles but does that flexibility actually cause more confusion and head aches (maintainability, documentation, etc.)? A more complex case is when we want to offer more complex inputs. For example, if we want to allow multiple filters on search: http://our.api.com/Search?term=pumas&filters={"productType":["Clothing","Bags"],"color":["Black","Red"]} We don't necessarily want to put the filter types (e.g. productType and color) as request names like this: http://our.api.com/Search?term=pumas&productType=["Clothing","Bags"]&color=["Black","Red"] Because we wanted to group all filter input together. In the end, does this really matter? It may be likely that there are so many JSON utils out there that the input type just doesn't matter that much. I know our javascript clients making AJAX calls to the API may appreciate the JSON inputs to make their life easier. Thanks, Will

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• How to forward a 'saved' request stream to another Action within the same controller?

  - by Moe Howard

  We have a need to chunk-up large http requests sent by our mobile devices. These smaller chunk streams are merged to a file on the server. Once all chunks are received we need a way to submit the saved merged request to an another method(Action) within the same controller that will process this large http request. How can this be done? The code we tried below results in the service hanging. Is there a way to do this without a round-trip? //Open merged chunked file FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read); //Read steam support variables int bytesRead = 0; byte[] buffer = new byte[1024]; //Build New Web Request. The target Action is called "Upload", this method we are in is called "UploadChunk" HttpWebRequest webRequest; webRequest = (HttpWebRequest)WebRequest.Create(Request.Url.ToString().Replace("Chunk", string.Empty)); webRequest.Method = "POST"; webRequest.ContentType = "text/xml"; webRequest.KeepAlive = true; webRequest.Timeout = 600000; webRequest.ReadWriteTimeout = 600000; webRequest.Credentials = System.Net.CredentialCache.DefaultCredentials; Stream webStream = webRequest.GetRequestStream(); //Hangs here, no errors, just hangs I have looked into using RedirectToAction and RedirecctToRoute but these methods don't fit well with what we are looking to do as we cannot edit the Request.InputStream (as it is read-only) to carry out large request stream. Thanks, Moe

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• C# serialPort speed

  - by MarekK

  Hi I am developing some monitoring tool for some kind of protocol based on serial communication. Serial BaudRate=187,5kb I use System.IO.Ports.SerialPort class. This protocol has 4 kinds of frames. They have 1Byte,3Bytes,6Bytes, 10-255Bytes. I can work with them but I receive them too late to respond. For the beginning I receive first packed after ex. 96ms (too late), and it contains about 1000B. This means 20-50 frames (too much, too late). Later its work more stable, 3-10Bytes but it is still too late because it contains 1-2 frames. Of Course 1 frame is OK, but 2 is too late. Can you point me how can I deal with it more reliable? I know it is possible. Revision1: I tried straight way: private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) { if (!serialPort1.IsOpen) return; this.BeginInvoke(new EventHandler(this.DataReceived)); } And Backgroud worker: And ... new Tread(Read) and... always the same. Too late, too slow. Do I have to go back to WinApi and import some kernel32.dll functions? Revision 2: this is the part of code use in the Treading way: int c = serialPort1.BytesToRead; byte[] b = new byte[c]; serialPort1.Read(b, 0, c); I guess it is some problem with stream use inside SerialPort class. Or some synchronization problem. Revision 3: I do not use both at once!! I just tried different ways. Regards MarekK

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• ASP.Net application timeout

  - by ClarkeyBoy

  Hi, I have an application I have just deployed which, for complicated reasons, stores all the data from the database in a module the first time any data from the specific table is required (i.e. when a customer requests to view a product for the first time, all the product data is stored in the ProductManager class (of which an instance is stored in a shared property of the SiteContent class, making the ProductManager easily accessible from any page). Now forget that you are probably now glaring at me for using this approach.. I am sure it has its inefficiencies but I have only been studying .Net for a year or so now so I am still learning. One thing I have noticed is that I can go on the site once, then revisit it 5 minutes later and it will load all the data into the ProductManager class again. It seems this is a .Net application timeout thing - since the session timeout is set to 30 minutes and, when I am logged in on the administration frontend, it logs me out after 5 minutes (ish). Does anyone have any idea how to change this? Is there any way I can change this in the code without having to contact the hosting company? If not in the code is there any way to change this in the web.config? Thanks in advance. Regards, Richard

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• PHP File Downloading Questions

  - by nsearle

  Hey All! I am currently running into some problems with user's downloading a file stored on my server. I have code set up to auto download a file once the user hits the download button. It is working for all files, but when the size get's larger than 30 MB it is having issues. Is there a limit on user download? Also, I have supplied my example code and am wondering if there is a better practice than using the PHP function 'file_get_contents'. Thank You all for the help! $path = $_SERVER['DOCUMENT_ROOT'] . '../path/to/file/'; $filename = 'filename.zip'; $filesize = filesize($path . $filename); @header("Content-type: application/zip"); @header("Content-Disposition: attachment; filename=$filename"); @header("Content-Length: $filesize") echo file_get_contents($path . $filename);

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• Setting corelocation results to NSNumber object parameters

  - by Dan Ray

  This is a weird one, y'all. - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { CLLocationCoordinate2D coordinate = newLocation.coordinate; self.mark.longitude = [NSNumber numberWithDouble:coordinate.longitude]; self.mark.latitude = [NSNumber numberWithDouble:coordinate.latitude]; NSLog(@"Got %f %f, set %f %f", coordinate.latitude, coordinate.longitude, self.mark.latitude, self.mark.longitude); [manager stopUpdatingLocation]; manager.delegate = nil; if (self.waitingForLocation) { [self completeUpload]; } } The latitude and longitude in that "mark" object are synthesized parameters referring to NSNumber iVars. In the simulator, my NSLog output for that line in the middle there reads: 2010-05-28 15:08:46.938 EverWondr[8375:207] Got 37.331689 -122.030731, set 0.000000 -44213283338325225829852024986561881455984640.000000 That's a WHOLE lot further East than 1 Infinite Loop! The numbers are different on the device, but similar--lat is still zero and long is a very unlikely high negative number. Elsewhere in the controller I'm accepting a button press and uploading a file (an image I just took with the camera) with its geocoding info associated, and I need that self.waitingForLocation to inform the CLLocationManager delegate that I already hit that button and once its done its deal, it should go ahead and fire off the upload. Thing is, up in the button-click-receiving method, I test see if CL is finished by testing self.mark.latitude, which seems to be getting set zero...

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• GRUB-2 Bootloader fails to load for lack of floppy drive. Ubuntu 10.4 & Windows XP

  - by kammer

  2010.07.21 while trying to install Ubuntu 10.4 Hello all, I've been trying to install Ubuntu 10.04 on my Dell workstation and am unable to get the Grub-2 bootloader to load properly. It seems to be failing for lack of a floppy drive on the system resulting in an error message that reads : error: fd0 cannot get C/H/S values. I've gone through the Grub-2 page at https://help.ubuntu.com/community/Grub2 to no avail and other sources having similar problems have likewise turned up no solutions. I would certainly appreciate any insight, here's the background: A while back I was trying to install a different version of Linux and had the same problems, then had to set the project aside for a bit. I don't think this has anything to do with Linux or Ubuntu per se, but rather Grub. The system is an old (4-5 years) Dell workstation that has one drive (128 GB) set up for Windows XP and a second new drive (500GB) which I installed for Linux. There is a DVD/CD drive and the system contains no floppy drive at all. In one attempt to get this working I tried modifying the BIOS to indicate there was a floppy drive - this created a failure earlier in the chain with the BIOS failing to load properly, not unexpected, just a shot in the dark at that point. At the moment I am considering just running out to buy and install a cheap floppy drive to see if that helps. I'll never use the thing though so I'd rather find a solution that doesn't require me to spend money on useless hardware. In any case, here's the /boot/grub/grub.cfg contents: # # DO NOT EDIT THIS FILE # # It is automatically generated by /usr/sbin/grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then load_env fi set default="0" if [ ${prev_saved_entry} ]; then set saved_entry=${prev_saved_entry} save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z ${boot_once} ]; then saved_entry=${chosen} save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi } insmod ext2 set root='(hd1,1)' search --no-floppy --fs-uuid --set fbebde47-f488-41b0-9480-337802ecb988 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 insmod gfxterm insmod vbe if terminal_output gfxterm ; then true ; else # For backward compatibility with versions of terminal.mod that don't # understand terminal_output terminal gfxterm fi fi insmod ext2 set root='(hd1,1)' search --no-floppy --fs-uuid --set fbebde47-f488-41b0-9480-337802ecb988 set locale_dir=($root)/boot/grub/locale set lang=en insmod gettext if [ ${recordfail} = 1 ]; then set timeout=-1 else set timeout=10 fi insmod play play 480 440 1 ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### menuentry 'Ubuntu, with Linux 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod ext2 set root='(hd1,1)' search --no-floppy --fs-uuid --set fbebde47-f488-41b0-9480-337802ecb988 linux /boot/vmlinuz-2.6.32-21-generic root=UUID=fbebde47-f488-41b0-9480-337802ecb988 ro quiet splash initrd /boot/initrd.img-2.6.32-21-generic } menuentry 'Ubuntu, with Linux 2.6.32-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod ext2 set root='(hd1,1)' search --no-floppy --fs-uuid --set fbebde47-f488-41b0-9480-337802ecb988 echo 'Loading Linux 2.6.32-21-generic ...' linux /boot/vmlinuz-2.6.32-21-generic root=UUID=fbebde47-f488-41b0-9480-337802ecb988 ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.32-21-generic } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod ext2 set root='(hd1,1)' search --no-floppy --fs-uuid --set fbebde47-f488-41b0-9480-337802ecb988 linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod ext2 set root='(hd1,1)' search --no-floppy --fs-uuid --set fbebde47-f488-41b0-9480-337802ecb988 linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry "Microsoft Windows XP Home Edition (on /dev/sda1)" { insmod ntfs set root='(hd0,1)' search --no-floppy --fs-uuid --set 6ef0d4b4f0d4842d drivemap -s (hd0) ${root} chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### Thoughts anyone? Thanks in advance.

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• VB.net (aspx) mysql connection

  - by StealthRT

  Hey all i am new to ASP.NET and VB.net code behind. I have a classic ASP page that connects to the mySQL server with the following code: Set oConnection = Server.CreateObject("ADODB.Connection") Set oRecordset = Server.CreateObject("ADODB.Recordset") oConnection.Open "DRIVER={MySQL ODBC 3.51 Driver}; SERVER=xxx.com; PORT=3306; DATABASE=xxx; USER=xxx; PASSWORD=xxx; OPTION=3;" sqltemp = "select * from userinfo WHERE emailAddress = '" & theUN & "'" oRecordset.Open sqltemp, oConnection,3,3 if oRecordset.EOF then ... However, i am unable to find anything to connect to mySQL in ASP.NET (VB.NET). I have only found this peice of code that does not seem to work once it gets to the "Dim conn As New OdbcConnection(MyConString)" code: Dim MyConString As String = "DRIVER={MySQL ODBC 3.51 Driver};" & _ "SERVER=xxx.com;" & _ "DATABASE=xxx;" & _ "UID=xxx;" & _ "PASSWORD=xxx;" & _ "OPTION=3;" Dim conn As New OdbcConnection(MyConString) MyConnection.Open() Dim MyCommand As New OdbcCommand MyCommand.Connection = MyConnection MyCommand.CommandText = "select * from userinfo WHERE emailAddress = '" & theUN & "'"" MyCommand.ExecuteNonQuery() MyConnection.Close() I have these import statements also: <%@ Import Namespace=System %> <%@ Import Namespace=System.IO %> <%@ Import Namespace=System.Web %> <%@ Import Namespace=System.ServiceProcess %> <%@ Import Namespace=Microsoft.Data.Odbc %> <%@ Import Namespace=MySql.Data.MySqlClient %> <%@ Import Namespace=MySql.Data %> <%@ Import Namespace=System.Data %> So any help would be great! :o) David

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