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• WCF net.tcp bindings, message formats and security questions

  - by RemotecUk

  Hi, sorry for the stupid questions but there are just some things about WCF I cant get my head around. Would be greatful for some advice on the following.... At a very basic level is it correct that WCF uses either Binary (Net.Tcp), HTTP or MSMQ to transfer my message on the wire? However is it true that in all cases, regardless of how the data is transferred the message itself in in the SOAP format with headers and a body? So its a sort of XML message that is transmitted in either HTTP/S or in a binary format. Is Net.Tcp a good choice for my client server app - its similar to a messenger app in that the clients are all remote users on the other side of the firewall to my server. Most things I am reading are telling to use WS* and HTTP. Is Net.Tcp secured by standard and without certificates? - that is - people cannot listen on the wire and decode the data thats going to and from. Is it possible to send a username and password using net.tcp and without an installed certificate? If so I presume I can hook this up to my membership provider and authenticate access to each method on my service contract implementation. I presume that with username and password security, the proxy is initialised with the username and password and that this information is is sent with every request. Then my membership provider will be invoked for each method call and do whatever it needs to do to get the authorisation for the method. Sorry for the dump of questions but would be great to know if Im thinking the right way about how WCF works. Thanks.

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• Fastest way to remove non-numeric characters from a VARCHAR in SQL Server

  - by Dan Herbert

  I'm writing an import utility that is using phone numbers as a unique key within the import. I need to check that the phone number does not already exist in my DB. The problem is that phone numbers in the DB could have things like dashes and parenthesis and possibly other things. I wrote a function to remove these things, the problem is that it is slow and with thousands of records in my DB and thousands of records to import at once, this process can be unacceptably slow. I've already made the phone number column an index. I tried using the script from this post: http://stackoverflow.com/questions/52315/t-sql-trim-nbsp-and-other-non-alphanumeric-characters But that didn't speed it up any. Is there a faster way to remove non-numeric characters? Something that can perform well when 10,000 to 100,000 records have to be compared. Whatever is done needs to perform fast. Update Given what people responded with, I think I'm going to have to clean the fields before I run the import utility. To answer the question of what I'm writing the import utility in, it is a C# app. I'm comparing BIGINT to BIGINT now, with no need to alter DB data and I'm still taking a performance hit with a very small set of data (about 2000 records). Could comparing BIGINT to BIGINT be slowing things down? I've optimized the code side of my app as much as I can (removed regexes, removed unneccessary DB calls). Although I can't isolate SQL as the source of the problem anymore, I still feel like it is.

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• Win32: What is the status of chunked encoding support in WinHttpReadData?

  - by Cheeso

  The documentation for WinHttpReadData says, regarding HTTP's chunked transfer coding: Starting in Windows Vista and Windows Server 2008, WinHttp enables applications to perform chunked transfer encoding on data sent to the server. When the Transfer-Encoding header is present on the WinHttp response, WinHttpReadData strips the chunking information before giving the data to the application. Can anyone decipher this? Q1 First, this text is on the page for WinHttpReadData, which is used to ... read data within an HTTP client application, specifically the response data. So what does it mean when it says Starting in Windows Vista and Windows Server 2008, WinHttp enables applications to perform chunked transfer encoding on data sent to the server. The WinHttpReadData function isn't used with data being sent to the server. It is used when reading data from the server. Consulting the doc for the WinHttpWriteData function, which is used to send data to the server as part of an HTTP request, there is no mention of the chunked transfer capability. Q2 Supposing that I figure out just what the newish chunked transfer support amounts to, how do I get that support? It says that it is new on Vista and WS2008. What happens if I write an app that runs on WS2003, and uses WinHttpReadData and it encounters a chunked response, or WinHttpWriteData, and it wants to send a chunked request? Between the lines, is this documentation saying that I need to link against the Vista-era Windows SDK, or later, in order to get the capability to do chunked encoding? Or is it really impossible on WS2003?, in other words it is the case that the app doing chunked transfer using this library must run on the OS specified? This might read like a rant, but it's not. I truly want to know.

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• signalR groups - connecting/disconnecting and sending - am I missing something?

  - by Terry_Brown

  very new to signalR, and have rolled up a very simple app that will take questions for moderation at conferences (felt like a straight forward use case) I have 2 hubs at the moment: - Question (for asking questions) - Speaker (these should receive questions and allow moderation, but that will come later) Solution lives at https://github.com/terrybrown/InterASK After watching a video (by David Fowler/Damian Edwards) (http://channel9.msdn.com/Shows/Web+Camps+TV/Damian-Edwards-and-David-Fowler-Demonstrate-SignalR) and another that I can't find the URL for atm, I thought I'd go with 'groups' as the concept to keep messages flowing to the right people. I implemented IConnected, IDisconnect as I'd seen in one of the videos, and upon debugging I can see Connect fire (and on reload I can see disconnect fire), but it seems nothing I do adds a person to a group. The signalR documentation suggests "Groups are not persisted on the server so applications are responsible for keeping track of what connections are in what groups so things like group count can be achieved" which I guess is telling me that I need to keep some method (static or otherwise?) of tracking who is in a group? Certainly I don't seem able to send to groups currently, though I have no problem distributing to anyone currently connected to the app and implementing the same JS method (2 machines on the same page). I suspect I'm just missing something - I read a few of the other questions on here, but none of them seem to mention IConnected/IDisconnect, which tells me these are either new (and nobody is using them) or that they're old (and nobody is using them). I know this could be considered a subjective question, though what I'm looking for is just a simple means of managing the groups so that I can do what I want to - send a question from one hub, and have people connected to a different hub receive it - groups felt the cleanest solution for this? Many thanks folks. Terry

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• Windows Workflow Foundation - Application-Integrated Debugging

  - by user292103

  I've got a typical n-tier app that has a heavy workflow component to it, so I'm interested in using WWF. There's a server-side piece that runs as a Windows Service, and there's the client-side piece written in Silverlight. To have a really great, seamlessly integrated experience for my users, what I want is to incorporate both a workflow designer and a workflow debugger into the application. Not Visual Studio, but something tightly integrated right into the app itself. Using the Silverlight client, the user (probably more of a power user) can design workflows. But not only that, they can open a debugger from within the Silverlight client, set breakpoints (which are really remote breakpoints back to the Windows Service), catch in-process workflows, and step through them. Wouldn't that be great? I think I have some idea how I might go about incorporating an integrated designer (use a Silverlight diagramming component, save the diagram to .XAML, parse the .XAML to re-create the diagram, etc., etc.) but how on Earth would I do the debugger? I have no idea how I would do that part. Is there some kind of debugging support engineered into WWF?

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• Gmail IMAP OAuth for desktop clients

  - by Sabya

  Recently Google announced that they are supporting OAUth for Gmail IMAP/SMTP. I browsed through their multiple documentations, but still I am confused about if they support OAuth for installed applications. 1. In this documentation they say: Note: Though the OAuth protocol supports the desktop/installed application use case, Google only supports OAuth for web applications. But they also have a document for OAuth for installed applications. 2. When I read the OAuth specification pointed by them, it says (in section 11.7): In many applications, the Consumer application will be under the control of potentially untrusted parties. For example, if the Consumer is a freely available desktop application, an attacker may be able to download a copy for analysis. In such cases, attackers will be able to recover the Consumer Secret used to authenticate the Consumer to the Service Provider. Also I think the disclaimer in point 1 above is about Google Data APIs, and surely IMAP/SMTP is not a part of them. I understand that for installed applications I can have a setup like: Have a small web-app at say example.com for my application. This web-app talks to Google gets the access token. The installed application talks to example.com only to get the access token. Installed application then talks to Google with the access token. I am now confused. Is this the only way?

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• C# Application Calling Powershell Script Issues

  - by Ben

  Hi, I have a C# Winforms application which is calling a simple powershell script using the following method: Process process = new Process(); process.StartInfo.FileName = @"powershell.exe"; process.StartInfo.Arguments = String.Format("-noexit \"C:\Develop\{1}\"", scriptName); process.Start(); The powershell script simply reads a registry key and outputs the subkeys. $items = get-childitem -literalPath hklm:\software foreach($item in $items) { Write-Host $item } The problem I have is that when I run the script from the C# application I get one set of results, but when I run the script standalone (from the powershell command line) I get a different set of results entirely. The results from running from the c# app are: HKEY_LOCAL_MACHINE\software\Adobe HKEY_LOCAL_MACHINE\software\Business Objects HKEY_LOCAL_MACHINE\software\Helios HKEY_LOCAL_MACHINE\software\InstallShield HKEY_LOCAL_MACHINE\software\Macrovision HKEY_LOCAL_MACHINE\software\Microsoft HKEY_LOCAL_MACHINE\software\MozillaPlugins HKEY_LOCAL_MACHINE\software\ODBC HKEY_LOCAL_MACHINE\software\Classes HKEY_LOCAL_MACHINE\software\Clients HKEY_LOCAL_MACHINE\software\Policies HKEY_LOCAL_MACHINE\software\RegisteredApplications PS C:\Develop\RnD\SiriusPatcher\Sirius.Patcher.UI\bin\Debug When run from the powershell command line I get: PS M: C:\Develop\RegistryAccess.ps1 HKEY_LOCAL_MACHINE\software\ATI Technologies HKEY_LOCAL_MACHINE\software\Classes HKEY_LOCAL_MACHINE\software\Clients HKEY_LOCAL_MACHINE\software\Equiniti HKEY_LOCAL_MACHINE\software\Microsoft HKEY_LOCAL_MACHINE\software\ODBC HKEY_LOCAL_MACHINE\software\Policies HKEY_LOCAL_MACHINE\software\RegisteredApplications HKEY_LOCAL_MACHINE\software\Wow6432Node PS M: The second set of results match what I have in the registry, but the first set of results (which came from the c# app) don't. Any help or pointers would be greatly apreciated :) Ben

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• Scrapy issue with iTunes' AppStore

  - by Eric

  I am using Scrapy to fetch some data from iTunes' AppStore database. I start with this list of apps: http://itunes.apple.com/us/genre/mobile-software-applications/id36?mt=8 In the following code I have used the simplest regex which targets all apps in the US store. from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor from scrapy.contrib.spiders import CrawlSpider, Rule class AppStoreSpider(CrawlSpider): domain_name = 'itunes.apple.com' start_urls = ['http://itunes.apple.com/us/genre/mobile-software-applications/id6015?mt=8'] rules = ( Rule(SgmlLinkExtractor(allow='itunes\.apple\.com/us/app'), 'parse_app', follow=True, ), ) def parse_app(self, response): .... SPIDER = AppStoreSpider() When I run it I receive the following: [itunes.apple.com] DEBUG: Crawled (200) <GET http://itunes.apple.com/us/genre/mobile-software-applications/id6015?mt=8> (referer: None) [itunes.apple.com] DEBUG: Filtered offsite request to 'itunes.apple.com': <GET http://itunes.apple.com/us/app/bloomberg/id281941097?mt=8> As you can see, when it starts crawling the first page it says: "Filtered offsite request to 'itunes.apple.com'". and then the spider stops.. it also returns this message: [ScrapyHTTPPageGetter,client] /usr/lib/python2.5/cookielib.py:1577: exceptions.UserWarning: cookielib bug! Traceback (most recent call last): File "/usr/lib/python2.5/cookielib.py", line 1575, in make_cookies parse_ns_headers(ns_hdrs), request) File "/usr/lib/python2.5/cookielib.py", line 1532, in _cookies_from_attrs_set cookie = self._cookie_from_cookie_tuple(tup, request) File "/usr/lib/python2.5/cookielib.py", line 1451, in _cookie_from_cookie_tuple if version is not None: version = int(version) ValueError: invalid literal for int() with base 10: '"1"' I have used the same script for other website and I didn't have this problem. Any suggestion?

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• NSURLErrorBadURL error

  - by Victor jiang

  My iphone app called Google Local Search(non javascript version) to behave some search business. Below is my code to form a url: NSString *url = [NSString stringWithFormat:@"http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=%@", keyword]; NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:url]]; [request setHTTPMethod:@"GET"]; //get response NSHTTPURLResponse* urlResponse = nil; NSError *error = [[[NSError alloc] init] autorelease]; NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error]; NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; When the keyword refers to english characters, it works fine, but when refers to chinese characters(encoded in UTF8, such as '???' whose UTF8 code is 'e5a4a9 e5ae89 e997a8'), it will report NSURLErrorBadURL error(-1000, Returned when a URL is sufficiently malformed that a URL request cannot be initiated). Why? Then I carry out further investigation, I use Safari and type in the url below: http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=??? It also works, and the output I got from Macsniffer is: /ajax/services/search/local?v=1.0&q=%E5%A4%A9%E5%AE%89%E9%97%A8 So I write a testing url directly in my app NSString *url = [NSString stringWithFormat:@"http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=%E5%A4%A9%E5%AE%89%E9%97%A8"]; And what I got from the Macsniffer is some other thing: /ajax/services/search/local?v=1.0&q=1.687891E-28750X1.417C0001416CP-102640X1.4CC2D04648FBP-9999-1.989891E+0050X1.20DC00184CC67P-953E8E99A8 It seems my keyword "%E5%A4%A9%E5%AE%89%E9%97%A8" was translated into something else. So how can I form a valid url? I do need help!

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• Can you use gzip over SSL? And Connection: Keep-Alive headers

  - by magenta

  I'm evaluating the front end performance of a secure (SSL) web app here at work and I'm wondering if it's possible to compress text files (html/css/javascript) over SSL. I've done some googling around but haven't found anything specifically related to SSL. If it's possible, is it even worth the extra CPU cycles since responses are also being encrypted? Would compressing responses hurt performance? Also, I'm wanting to make sure we're keeping the SSL connection alive so we're not making SSL handshakes over and over. I'm not seeing Connection: Keep-Alive in the response headers. I do see Keep-Alive: 115 in the request headers but that's only keeping the connection alive for 115 milliseconds (seems like the app server is closing the connection after a single request is processed?) Wouldn't you want the server to be setting that response header for as long as the session inactivity timeout is? I understand browsers don't cache SSL content to disk so we're serving the same files over and over and over on subsequent visits even though nothing has changed. The main optimization recommendations are reducing the number of http requests, minification, moving scripts to bottom, image optimization, possible domain sharding (though need to weigh the cost of another SSL handshake), things of that nature.

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• Paperclip and Amazon S3 Issue

  - by Jimmy

  Hey everyone, I have a rails app running on Heroku. I am using paperclip for some simple image uploads for user avatars and some other things, I have S3 set as my backend and everything seems to be working fine except when trying to push to S3 I get the following error: The AWS Access Key Id you provided does not exist in our records. Thinking I mis-pasted my access key and secret key, I tried again, still no luck. Thinking maybe it was just a buggy key I deactivated it and generated a new one. Still no luck. Now for both keys I have used the S3 browser app on OS X and have been able to connect to each and view my current buckets and add/delete buckets. Is there something I should be looking out for? I have my application's S3 and paperclip setup like so development: bucket: (unique name) access_key_id: ENV['S3_KEY'] secret_access_key: ENV['S3_SECRET'] test: bucket: (unique name) access_key_id: ENV['S3_KEY'] secret_access_key: ENV['S3_SECRET'] production: bucket: (unique_name) access_key_id: ENV['S3_KEY'] secret_access_key: ENV['S3_SECRET'] has_attached_file :cover, :styles => { :thumb => "50x50" }, :storage => :s3, :s3_credentials => "#{RAILS_ROOT}/config/s3.yml", :path => ":class/:id/:style/:filename" Note: I just added the (unique name) bits, those aren't actually there--I have also verified bucket names, but I don't even think this is getting that far. I also have my heroku environment vars setup correctly and have them setup on dev

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• Problem trying to install PyCurl on Mac Snow Leopard

  - by Ldn

  Hi, My app needs to use PyCurl, so i tried to install it on my Mac but i found a lot of problems and error :( Requirement: First of all i've to say that the version of Python working on my Mac is 32 bit based, because i need to use WxPython, that needs 32 bit Python. For doing this i used: defaults write com.apple.versioner.python Prefer-32-Bit -bool yes To install PyCurl i used: sudo env ARCHFLAGS="-arch x86_64" easy_install setuptools pycurl And the terminal returned: Best match: setuptools 0.6c11 Processing setuptools-0.6c11-py2.6.egg setuptools 0.6c11 is already the active version in easy-install.pth Installing easy_install script to /usr/local/bin Installing easy_install-2.6 script to /usr/local/bin Using /Library/Python/2.6/site-packages/setuptools-0.6c11-py2.6.egg Processing dependencies for setuptools Finished processing dependencies for setuptools Searching for pycurl Best match: pycurl 7.16.2.1 Processing pycurl-7.16.2.1-py2.6-macosx-10.6-universal.egg pycurl 7.16.2.1 is already the active version in easy-install.pth Using /Library/Python/2.6/site-packages/pycurl-7.16.2.1-py2.6-macosx-10.6-universal.egg Processing dependencies for pycurl Finished processing dependencies for pycurl so i thought that pycurl was correctly installed and working. But... But when i started my app, python return me an error: python /Users/lorenzodenobili/Desktop/Python/AGGIORNATORE_PY/Dropbox/wxPython/test.py Traceback (most recent call last): File "/Users/lorenzodenobili/Desktop/Python/AGGIORNATORE_PY/Dropbox/wxPython/test.py", line 20, in <module> import pycurl File "build/bdist.macosx-10.6-universal/egg/pycurl.py", line 7, in <module> File "build/bdist.macosx-10.6-universal/egg/pycurl.py", line 6, in __bootstrap__ ImportError: dlopen(/Users/lorenzodenobili/.python-eggs/pycurl-7.16.2.1-py2.6-macosx-10.6-universal.egg-tmp/pycurl.so, 2): no suitable image found. Did find: /Users/lorenzodenobili/.python-eggs/pycurl-7.16.2.1-py2.6-macosx-10.6-universal.egg-tmp/pycurl.so: mach-o, but wrong architecture Yep, there is something quite big that goes wrong. I really don't have any idea on how to solve this error, so i really need your help! thank you so much!!

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• Maintaining ISAPI Rewrite Path with the ASP.NET tilde (~)

  - by Adam

  My team is upgrading from ASP.NET 3.5 to ASP.NET 4.0. We are currently using Helicon ISAPI Rewrite to map http://localhost/<account-name>/default.aspx to http://localhost/<virtual-directory>/default.aspx?AccountName=<account-name> where <account-name> is a query string variable and <virtual-directory> is a virtual directory (naturally). Before the upgrade the tilde (~) resolved to http://localhost/<account-name>/... (which I want it to do) and after the upgrade the tilde resolves to http://localhost/<virtual-directory>/... which results in an error because the <account-name> query string is required. I'd like to avoid going down the road of replacing everything with relative paths because there are several features in our system that use the entire URL instead of just the relative path. For what it's worth I'm using IIS7 in Windows 7, Visual Studio 2010 with ASP.NET 4.0 and the 64 bit Helicon ISAPI Rewrite. If I switch back to the ASP.NET 3.5 version then it still works fine (leading me to believe nothing changed in IIS unless it's within the 4.0 app pool - when I switch back and forth between 3.5 and 4.0 I have to change the app pool in IIS). Any ideas? Thanks in advance!

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• Good DB Migrations for CakePHP?

  - by Martin Westin

  Hi, I have been trying a few migration scripts for CakePHP but I ran into problems with all of the in some form or another. Please advice me on a migration option for Cake that you use live and know works. I'd like the following "features": -Support CakePHP 1.2(e.g. CakeDCs migrations will only be an option when 1.3 is stable and my app migrated to the new codebase) -Support for (or at least not halt on) Models with a different database config. -Support Models in sub-folders of app/models -Support Models in plugins -Support tables that do not conform to Cake conventions (I have a few special tables that do not have a single primary key field and need to keep them) -Plays well with automated deployment via Capistrano and Git. I do not need rails-style versioned files a git versioned schema file that is compared live to the existing schema will do. That is: I like the SchemaShell in Cake apart from it not being compatible with most of my requirements above. I have looked at and tested: CakePHP Schema Shell http://book.cakephp.org/view/734/Schema-management-and-migrations CakeDC migrations http://cakedc.com/downloads/view/cakephp_migrations_plugin YAML migrations http://github.com/georgious/cakephp-yaml-migrations-and-fixtures joelmoss migrations http://code.google.com/p/cakephp-migrations

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• ASP.NET MVC : strange POST behavior

  - by user93422

  ASP.NET MVC 2 app I have two actions on my controller (Toons): [GET] List [POST] Add App is running on IIS7 integration mode, so /Toons/List works fine. But when I do POST (that redirects to /Toons/List internally) it redirects (with 302 Object Moved) back to /Toons/Add. The problem goes away if I use .aspx hack (that works in IIS6/IIS7 classic mode). But without .aspx - GET work fine, but POST redirects me onto itself but with GET. What am I missing? I'm hosting with webhost4life.com and they did change IIS7 to integrated mode already. EDIT: The code works as expected using UltiDev Cassini server. EDIT: It turned out to be trailing-slash-in-URL issue. Somehow IIS7 doesn't route request properly if there is no slash at the end. EDET: Explanation of the behavior What happens is when I request (POST) /Toons/List (without trailing slash), IIS doesn't find the handler (I do not have knowledge to understand how exactly IIS does URL-to-handler mapping) and redirects the request (using 302 code) to /Toons/List/ (notice trailing slash). A browser, according to the HTTP specification, must redirect the request using same method (POST in this case), but instead it handles 302 as if it is 303 and issues GET request for the new URL. This is incorrect, but known behavior of most browsers. The solution is either to use .aspx-hack to make it unambiguous for IIS how to map requests to ASP.NET handler, or configure IIS to handle everything in the virtual directory using ASP.NET handler. Q: what is a better way to handle this?

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• How do I save an Android application's state?

  - by Bernard

  I've been playing around with the Android SDK, and I am a little unclear on saving an applications state. So given this minor re-tooling of the 'Hello, Android' example: package com.android.hello; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class HelloAndroid extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mTextView = new TextView(this); if (savedInstanceState == null) { mTextView.setText("Welcome to HelloAndroid!"); } else { mTextView.setText("Welcome back."); } setContentView(mTextView); } private TextView mTextView = null; } I thought that might be all one needed to do for the simplest case, but it always gives me the first message, no matter how I navigate away from the app. I'm sure it's probably something simple like overriding onPause or something like that, but I've been poking away in the docs for 30 minutes or so and haven't found anything obvious, so would appreciate any help. Cue me looking a fool in three, two, one... Thanks.

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• Can't get Secondary UITableViewController to display inside a UITabBarController

  - by Paul Johnston

  I've programmatically created a UITabBarController that is loaded in my App Delegate like this: - (void)applicationDidFinishLaunching:(UIApplication *)application { tabBarController = [[UITabBarController alloc] init]; myTableViewController = [[MyTableViewController alloc] init]; UINavigationController *tableNavController = [[[UINavigationController alloc] initWithRootViewController:myTableViewController] autorelease]; myTableViewController.title = @"Tab 1"; [myTableViewController release]; mySecondTableViewController = [[MySecondTableViewController alloc] init]; UINavigationController *table2NavController = [[[UINavigationController alloc] initWithRootViewController:mySecondTableViewController] autorelease]; mySecondTableViewController.title = @"Tab 2"; [mySecondTableViewController release]; tabBarController.viewControllers = [NSArray arrayWithObjects:tableNavController, table2NavController, nil]; [window addSubview:tabBarController.view]; [window makeKeyAndVisible]; } Now the issue I have is that I can get into the views no problem, but when I try and click onto any item in the Table View, I can't get a secondary table view to appear in any tab. The tabs work absolutely fine, just the secondary views. I'm using the code below in my myTableViewController to run when selecting a specific row (the code reaches the HELP line, and crashes)... - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSUInteger row = [indexPath row]; // this gets the correct view controller from a list of controllers SecondaryViewController *svc = [self.controllers objectAtIndex:row]; /*** HELP NEEDED WITH THIS LINE ***/ [self.navigationController pushViewController:svc animated:YES]; } Simply put, I'm trying to switch views to the new view controller whilst keeping the tabs available and using the navigation to go back and forth (like in the iTunes App). Any help appreciated. Thanks

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• Is it possible to mix MEF and Unity within a MEF-based plugin?

  - by Dave

  I'm finally diving into Unity head first, and have run into my first real problem. I've been gradually changing some things in my app from being MEF-resolved to Unity-resolved. Everything went fine on the application side, but then I realized that my plugins were not being loaded. I started to look into this issue, and I believe it's a case where MEF and Unity don't mix. Plugins are loaded by MEF, but each plugin needs to get access to the shared libraries in my application, like app preferences, logging, etc. Initially, my plugin constructor had the ImportingConstructor attribute. I then replaced it with InjectionConstructor so that Unity could resolve its shared library dependencies. But because I did that, MEF no longer loaded it! Then I used both attributes, which compiled, but then I got a composition error (MEF). I figured that this was because the constructor takes a parameter that was once resolved by a MEF Import, so I removed all parameters. As expected, now MEF was able to load my plugin, but because the constructor needs to call into the interface that was once passed in, construction fails. So now I'm at a point where I can get MEF to start to load my plugin, but can't do anything with it because the plugin relies on shared libraries that are registered with Unity. For those of you that have successfully mixed MEF and Unity, how do you go about resolving the references to the shared libraries with Unity?

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• SQLite table does not exist exception for existing SQLite database (and table)

  - by SK9

  I've followed the instructions given here for introducing an existing SQLite database to your Android app. When I query the table "android_metadata" this is fine. But when I run a similar query on my own table "words" (which has _id for primary integer key) I get a table does not exist exception and the app crashes. Why is that? Code: Cursor c = myDatabase.query("android_metadata", null, null, null, null, null, null, null); works but Cursor c = myDatabase.query("words", null, null, null, null, null, null, null); returns a table does not exist exception. This is how I'm creating the database (the references to paths and filenames are correct): private void copyDatabase() throws IOException{ //Open local db as the input stream InputStream myInput = mContext.getAssets().open(DB_NAME); //Path to the just created empty db String outFileName = DB_PATH + DB_NAME; //Open the empty db as the output stream OutputStream myOutput = new FileOutputStream(outFileName); //Transfer bytes from the inputfile to the outputfile byte[] buffer = new byte[1024]; int length; while ((length = myInput.read(buffer))>0){ myOutput.write(buffer, 0, length); } //Close the streams myOutput.flush(); myOutput.close(); myInput.close(); } (Note: To my eyes, the table is there. I'm looking right at it in my SQLite browser.)

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• Lucene.net create+lock errors in ASP.NET

  - by acidzombie24

  I have an issue with Lucene.net. It throws a lock exception. After poking around i notice these things. My code below works in an app bit when calling in Application_Start i get a NoSuchDirectoryException. Not closing the writer (as my code doesnt do below) i WILL get a LockObtainFailedException with the message Lock obtain timed out: SimpleFSLock@<FULL_PATH> from either app or asp.net These thread hinted when spawning threads they get less permissions then i do (but! my main thread has problems as well...) and one solution is to impersonate IIS. I am using visual studios 2010. I am not sure how full blown it is but my attempt to impersonate it failed. So my question is how do i have lucene create the directory and not throw an exception if dont close the writer for some reason (such as power going out)? http://stackoverflow.com/questions/2341163/why-is-my-lucene-index-getting-locked/2499285#2499285 http://stackoverflow.com/questions/1123517/lucene-net-and-i-o-threading-issue/1123981#1123981 static IndexWriter writer = null; static void lucene_init() { bool create = false; //I now use a full path. I still get NoSuchDirectoryException //string dirname = "LuceneIndex_z"; if (System.IO.Directory.Exists(dirname) == false) create = true; var directory = FSDirectory.GetDirectory(dirname); var analyzer = new StandardAnalyzer(); writer = new IndexWriter(directory, analyzer, create); }

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• Android RestTemplate Ok on emulator but fails on real device

  - by Hossein

  I'm using spring RestTemplate and it works perfect on emulator but if I run my app on real device I get HttpMessageNotWritableException ............ nested exception is java.net.SocketException: Broken pipe Here is some lines of my code(keep in mind my app works perfect on emulator) ............ LoggerUtil.logToFile(TAG, "url is [" + url + "]"); LoggerUtil.logToFile(TAG, "NetworkInfo - " + connectivityManager.getActiveNetworkInfo()); ResponseEntity<T> responseEntity = restTemplate.exchange(url, HttpMethod.POST, requestEntity, clazz); ............. I know my device's network works perfect because all other applications on my device are working and also using device browser I'm able to connect to my server so my server is available. My server is up and running and my device is able to connect to my server so why I get java.net.SocketException: Broken pipe ?!!!!!!! Before I call restTemplate.exchange() I log NetworkInfo and it looks ok -type: WIFI -status: CONNECTED/CONNECTED -isAvailable: true Thanks in advance. Update: It is really weird Even if I use HttpURLConnection, it works perfectly on emulator but on real device I get 400 Bad Request Here is my code HttpURLConnection con = null; try { String url = ....; LoggerUtil.logToFile(TAG, "url [" + url + "]" ); con = (HttpURLConnection) new URL(url).openConnection(); con.setRequestMethod("POST"); con.setRequestProperty("Connection", "Keep-Alive"); con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); con.connect(); LoggerUtil.logToFile(TAG, "con.getResponseCode is " + con.getResponseCode()); LoggerUtil.logToFile(TAG, "con.getResponseMessage is " + con.getResponseMessage()); } catch(Throwable t){ LoggerUtil.logToFile(TAG, "*** failed [" + t + "]" ); } in log file I see con.getResponseCode is 400 con.getResponseMessage is Bad Request

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• Lucene.net create+lock errors in ASP.NET

  - by acidzombie24

  I have an issue with Lucene.net. It throws a lock exception. After poking around i notice these things. My code below works in an app bit when calling in Application_Start i get a NoSuchDirectoryException. Not closing the writer (as my code doesnt do below) i WILL get a LockObtainFailedException with the message Lock obtain timed out: SimpleFSLock@<FULL_PATH> from either app or asp.net These thread hinted when spawning threads they get less permissions then i do (but! my main thread has problems as well...) and one solution is to impersonate IIS. I am using visual studios 2010. I am not sure how full blown it is but my attempt to impersonate it failed. So my question is how do i have lucene create the directory and not throw an exception if dont close the writer for some reason (such as power going out)? http://stackoverflow.com/questions/2341163/why-is-my-lucene-index-getting-locked/2499285#2499285 http://stackoverflow.com/questions/1123517/lucene-net-and-i-o-threading-issue/1123981#1123981 static IndexWriter writer = null; static void lucene_init() { bool create = false; string dirname = "LuceneIndex_z"; if (System.IO.Directory.Exists(dirname) == false) create = true; var directory = FSDirectory.GetDirectory(dirname); var analyzer = new StandardAnalyzer(); writer = new IndexWriter(directory, analyzer, create); }

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• Classic ASP Session not working in IIS 7 Windows Server 2008 R2 x64

  - by user553361

  Hi, I've been googleing and searching here info about this but so far couldn't find anything relevant to my problem. We have a website currently working on II6 and Windows Server 2003 (x86) without any problem. Now we want to migrate our server to a Virtual Machine with Windows Server 2008 R2 (x64) and IIS7. Out current app is built in Classic ASP and SQL Server (This one located on a 2nd Server but this is staying the way it is now). The website is configured as a WebSite, not a virtual directory. Using DefaultAppPool with 4 applications. Now, the problem I'm getting is with the Sessions, or at least that's what I think since I created a simple hello.asp with this code <% response.write "Hello" response.write Session.SessionID %> And this is giving us this result: Hello error '8002801d' /hello.asp, line 3 ASP Sessions Properties Enable Session State : True Maximum Sessions : 2147483647 New ID On Secure Connection : True Time-out : 20 min This is the log in Event Viewer Warning 24/12/2010 14:03:42 Active Server Pages 9 None FailedReqLog Url http://apps.shocklogic.com:80/hello.asp App Pool DefaultAppPool Authentication anonymous User from token NT AUTHORITY\IUSR Activity ID {00000000-0000-0000-1400-0080000000F8} Site 1 Process 3312 Failure Reason STATUS_CODE Trigger Status 500 Final Status 500 Time Taken 110 msec Would be great if anyone has any ideas. Thanks, Federico

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• Resizing and saving an image in WinMobile and .NET CF throws OutOfMemoryException

  - by devguy

  I have a WinMobile app which allows the user the snap a photo with the camera, and then use for for various things. The photo can be snapped at 1600x1200, 800x600 or 640x480, but it must always be resized to 400px for the longest size (the other is proportional of course). Here's the code: private void LoadImage(string path) { Image tmpPhoto = new Bitmap(path); // calculate new bitmap size... double width = ... double height = ... // draw new bitmap Image photo = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb); using (Graphics g = Graphics.FromImage(photo)) { g.FillRectangle(new SolidBrush(Color.White), new Rectangle(0, 0, photo.Width, photo.Height)); int srcX = (int)((double)(tmpPhoto.Width - width) / 2d); int srcY = (int)((double)(tmpPhoto.Height - height) / 2d); g.DrawImage(tmpPhoto, new Rectangle(0, 0, photo.Width, photo.Height), new Rectangle(srcX, srcY, photo.Width, photo.Height), GraphicsUnit.Pixel); } tmpPhoto.Dispose(); // save new image and dispose photo.Save(Path.Combine(config.TempPath, config.TempPhotoFileName), System.Drawing.Imaging.ImageFormat.Jpeg); photo.Dispose(); } Now the problem is that the app breaks in the photo.Save call, with an OutOfMemoryException. And I don't know why, since I dispose the tempPhoto (with the original photo from the camera) as soon as I can, and I also dispose the Graphics obj. Why does this happen? It seems impossible to me that one can't take a photo with the camera and resize/save it without making it crash :( Should I restor t C++ for such a simple thing? Thanks.

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• Using Enterprise Library DAAB in C# Console Project

  - by Kayes

  How can I prepare the configuration settings (App.config, maybe?) I need to use Enterprise Library Data Access Application Block in a C# console project? Following is what I currently trying with an App.config in the console project. When I call DatabaseFactory.CreateDatabase(), it throws an exception which says: "Configuration system failed to initialize" <configuration> <dataConfiguration> <xmlSerializerSection type="Microsoft.Practices.EnterpriseLibrary.Data. Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"> <enterpriseLibrary.databaseSettings xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" defaultInstance="Northwind" xmlns="http://www.microsoft.com/practices/enterpriselibrary/08-31-2004/data"> <databaseTypes> <databaseType name="Sql Server" type="Microsoft.Practices.EnterpriseLibrary.Data.Sql.SqlDatabase, Microsoft.Practices.EnterpriseLibrary.Data, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" /> </databaseTypes> <instances> <instance name="Northwind" type="Sql Server" connectionString="Northwind" /> </instances> <connectionStrings> <connectionString name="Northwind"> <parameters> <parameter name="Database" value="Northwind" isSensitive="false" /> <parameter name="Integrated Security" value="True" isSensitive="false" /> <parameter name="Server" value="local" isSensitive="false" /> <parameter name="User ID" value="sa" isSensitive="false" /> <parameter name="Password" value="sa1234" isSensitive="true" /> </parameters> </connectionString> </connectionStrings> </enterpriseLibrary.databaseSettings> </xmlSerializerSection> </dataConfiguration> </configuration>

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