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• Eclipse Helios on OS X Snow Leopard crashes frequently when editing certain PHP files

  - by William

  I use Eclipse Helios (Eclipse Platform: 3.6.0.I20100608-0911, Eclipse IDE for PHP Developers: 1.3.0.20100617-0520) all the time on OS X (Snow Leopard), and it seems I only run into trouble whenever I'm editing a PHP file that's part of the WordPress blogging framework. When I move my cursor to a variable or function name, that often triggers the beach ball of death. I suspect Eclipse is trying to look up that variable/function and for some reason that causes an endless loop. Sometimes it's not just variables or functions. Just today I was trying to replace all occurrences of a quoted string. Every time I clicked "Replace All", the program would freeze immediately after the string was replaced and the text cursor was moved to the replaced position. I think the moving of the text cursor is important, because I got the same result when I searched for the string (thus moving the cursor), but NOT when I searched for a nonexistent string. I tried disabling everything in my preferences related to marked occurrences, hovering, code assistance, etc. Nothing helps. I use Eclipse for all my projects, and I find that it's only WordPress projects where this happens. Here's my eclipse.ini file: -startup ../../../plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar --launcher.library ../../../plugins/org.eclipse.equinox.launcher.cocoa.macosx_1.1.0.v20100503 -product org.eclipse.epp.package.php.product --launcher.defaultAction openFile -showsplash org.eclipse.platform --launcher.XXMaxPermSize 512m --launcher.defaultAction openFile -vmargs -Dosgi.requiredJavaVersion=1.5 -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts -XX:PermSize=128m -XX:MaxPermSize=128m -XX:MaxGCPauseMillis=10 -XX:MaxHeapFreeRatio=70 -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:+CMSIncrementalPacing -XX:CompileThreshold=5 -Xms128m -Xmx512m -Xss2m -Xdock:icon=../Resources/Eclipse.icns -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts -framework ../../../plugins/org.eclipse.osgi.services_3.2.100.v20100503.jar I have 4GB of RAM, so I don't know if the problem is I'm underutilizing my resources. Here's what I see over and over in the error log: !ENTRY org.eclipse.jface 2 0 2011-01-16 16:26:21.533 !MESSAGE Keybinding conflicts occurred. They may interfere with normal accelerator operation. !SUBENTRY 1 org.eclipse.jface 2 0 2011-01-16 16:26:21.533 !MESSAGE A conflict occurred for ALT+COMMAND+Q P: Binding(ALT+COMMAND+Q P, ParameterizedCommand(Command(org.eclipse.ui.views.showView,Show View, Shows a particular view, Category(org.eclipse.ui.category.views,Views,Commands for opening views,true), org.eclipse.ui.handlers.ShowViewHandler@2a46d1, [Lorg.eclipse.ui.internal.commands.Parameter;@18f50c2,,true), [Lorg.eclipse.core.commands.Parameterization;@1ff1855), org.eclipse.ui.defaultAcceleratorConfiguration, org.eclipse.ui.contexts.window,,cocoa,system) Binding(ALT+COMMAND+Q P, ParameterizedCommand(Command(org.eclipse.ui.views.showView,Show View, Shows a particular view, Category(org.eclipse.ui.category.views,Views,Commands for opening views,true), org.eclipse.ui.handlers.ShowViewHandler@2a46d1, [Lorg.eclipse.ui.internal.commands.Parameter;@18f50c2,,true), [Lorg.eclipse.core.commands.Parameterization;@96b40c), org.eclipse.ui.defaultAcceleratorConfiguration, org.eclipse.ui.contexts.window,,cocoa,system) !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.217 !MESSAGE System property http.proxyHost has been set to 127.0.0.1 by an external source. This value will be overwritten using the values from the preferences !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.217 !MESSAGE System property http.proxyPort has been set to 8888 by an external source. This value will be overwritten using the values from the preferences !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.218 !MESSAGE System property https.proxyHost has been set to 127.0.0.1 by an external source. This value will be overwritten using the values from the preferences !ENTRY org.eclipse.core.net 1 0 2011-01-16 16:26:22.219 !MESSAGE System property https.proxyPort has been set to 8888 by an external source. This value will be overwritten using the values from the preferences I did some experimenting with the particular script that's giving me trouble. It's a hybrid of HTML and PHP, so Eclipse has to do both HTML and PHP validation. I wondered if the HTML validation had something to do with it, so I created a new file, copied the contents over, and messed with the doctype element. I found that if I replaced the well-formed XHTML 1.0 Strict doctype element with a generic doctype (as such: <!DOCTYPE html>), then I did not crash the program just by moving the cursor around. I set all HTML validation rules to "Ignore", but it still didn't solve my problems. For now, I'm just going to echo the doctype using PHP instead of entering it literally. That seems to prevent crashes. I notice that when I move the cursor around the document, Eclipse displays the "xpath" to my current location at the bottom of the screen. Sometimes there's a delay while it figures out my current path. Perhaps when it's validating against the Strict doctype, it has problems quickly calculating the xpath as I move the cursor around? Maybe it has a stack overflow that causes it to crash.

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• rm on a directory with millions of files

  - by BMDan

  Background: physical server, about two years old, 7200-RPM SATA drives connected to a 3Ware RAID card, ext3 FS mounted noatime and data=ordered, not under crazy load, kernel 2.6.18-92.1.22.el5, uptime 545 days. Directory doesn't contain any subdirectories, just millions of small (~100 byte) files, with some larger (a few KB) ones. We have a server that has gone a bit cuckoo over the course of the last few months, but we only noticed it the other day when it started being unable to write to a directory due to it containing too many files. Specifically, it started throwing this error in /var/log/messages: ext3_dx_add_entry: Directory index full! The disk in question has plenty of inodes remaining: Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sda3 60719104 3465660 57253444 6% / So I'm guessing that means we hit the limit of how many entries can be in the directory file itself. No idea how many files that would be, but it can't be more, as you can see, than three million or so. Not that that's good, mind you! But that's part one of my question: exactly what is that upper limit? Is it tunable? Before I get yelled at--I want to tune it down; this enormous directory caused all sorts of issues. Anyway, we tracked down the issue in the code that was generating all of those files, and we've corrected it. Now I'm stuck with deleting the directory. A few options here: rm -rf (dir)I tried this first. I gave up and killed it after it had run for a day and a half without any discernible impact. unlink(2) on the directory: Definitely worth consideration, but the question is whether it'd be faster to delete the files inside the directory via fsck than to delete via unlink(2). That is, one way or another, I've got to mark those inodes as unused. This assumes, of course, that I can tell fsck not to drop entries to the files in /lost+found; otherwise, I've just moved my problem. In addition to all the other concerns, after reading about this a bit more, it turns out I'd probably have to call some internal FS functions, as none of the unlink(2) variants I can find would allow me to just blithely delete a directory with entries in it. Pooh. while [ true ]; do ls -Uf | head -n 10000 | xargs rm -f 2/dev/null; done ) This is actually the shortened version; the real one I'm running, which just adds some progress-reporting and a clean stop when we run out of files to delete, is: export i=0; time ( while [ true ]; do ls -Uf | head -n 3 | grep -qF '.png' || break; ls -Uf | head -n 10000 | xargs rm -f 2/dev/null; export i=$(($i+10000)); echo "$i..."; done ) This seems to be working rather well. As I write this, it's deleted 260,000 files in the past thirty minutes or so. Now, for the questions: As mentioned above, is the per-directory entry limit tunable? Why did it take "real 7m9.561s / user 0m0.001s / sys 0m0.001s" to delete a single file which was the first one in the list returned by "ls -U", and it took perhaps ten minutes to delete the first 10,000 entries with the command in #3, but now it's hauling along quite happily? For that matter, it deleted 260,000 in about thirty minutes, but it's now taken another fifteen minutes to delete 60,000 more. Why the huge swings in speed? Is there a better way to do this sort of thing? Not store millions of files in a directory; I know that's silly, and it wouldn't have happened on my watch. Googling the problem and looking through SF and SO offers a lot of variations on "find" that obviously have the wrong idea; it's not going to be faster than my approach for several self-evident reasons. But does the delete-via-fsck idea have any legs? Or something else entirely? I'm eager to hear out-of-the-box (or inside-the-not-well-known-box) thinking. Thanks for reading the small novel; feel free to ask questions and I'll be sure to respond. I'll also update the question with the final number of files and how long the delete script ran once I have that. Final script output!: 2970000... 2980000... 2990000... 3000000... 3010000... real 253m59.331s user 0m6.061s sys 5m4.019s So, three million files deleted in a bit over four hours.

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• Portable scripting language for a multi-server admin?

  - by Aaron

  Please Note: Portable as in portableapps.com, not the traditional definition. Originally posted on stackoverflow.com, asking here at another user's suggestion. I'm a DBA and sysadmin, mostly for Windows machines running SQL Server. I'm looking for a programming/scripting language for Windows that doesn't require Admin access or an installer, needing no install process other than expanding it into a folder. My intent is to have a language for automation on which I can standardize. Up to this point, I've been using a combination of batch files and Unix shell, using sh.exe from UnxUtils but it's far from a perfect solution. I've evaluated a handful of options, all of them have at least one serious shortcoming or another. I have a strong preference for something open source or dual license, but I'm more interested in finding the right tool than anything else. Not interested that anything that relies on Cygwin or Java, but at this point I'd be fine with something that needs .NET. Requirements: Manageable footprint (1-100 files, under 30 MB installed) Run on Windows XP and Server (2003+) No installer (exe, msi) Works with external pipes, processes, and files Support for MS SQL Server or ODBC connections Bonus Points: Open Source FFI for calling functions in native DLLs GUI support (native or gtk, wx, fltk, etc) Linux, AIX, and/or OS X support Dynamic, object oriented and/or functional, interpreted or bytecode compiled; interactive development Able to package or compile scripts into executables So far I've tried: Ruby: 148 MB on disk, 23000 files Portable Python: 54 MB on disk, 2800 files Strawberry Perl: 123 MB on disk, 3600 files REBOL: Great, except closed source and no MSSQL or ODBC in free version Squeak Smalltalk: Great, except poor support for scripting ---- cut: points of clarification ---- Why all the limitations? I realize some of my criteria seem arbitrarily confining. It's primarily a product my environment. I work as a SQL Server DBA and backup Unix admin at a division of a large company. In addition to near a hundred boxes running some version or another of SQL Server on Windows, I also support the SQL Server Express Edition installs on over a thousand machines in the field. Because of our security policies, I don't login rights on every machine. Often enough, an issue comes up and I'm given local Admin for some period of time. Often enough, it's some box I've never touched and don't have my own environment setup yet. I may have temporary admin rights on the box, but I'm not the admin for the machine- I'm just the DBA. I've no interest in stepping on the toes of the Windows admins, nor do I want to take over any of their duties. If I bring up "installing" something, suddenly it becomes a matter of interest for Production Control and the Windows admins; if I'm copying up a script, no one minds. The distinction may not mean much to the readers, but if someone gets the wrong idea I've suddenly got a long wait and significant overhead before I can get the tool installed and get the problem solved. That's why I want something that can be copied and run in the manner of a portable app. What about the small footprint? My company has three divisions, each in a different geographical location, and one of them is a new acquisition. We have different production control/security policies in each division. I support our MSSQL databases in all three divisions. The field machines are spread around the US, sometimes connecting to the VPN over very slow links. Installing Ruby \using psexec has taken a long time over these connections. In these instances, the bigger time waster seems to be archives with thousands and thousands of files rather than their sheer size. You could say I'm spoiled by Unix, where the admins usually have at least some modern scripting language installed; I'd use PowerShell, but I don't know it well and more importantly it isn't everywhere I need to work. It's a regular occurrence that I need to write, deploy and execute some script on short notice on some machine I've never on which logged in. Since having Ruby or something similar installed on every machine I'll ever need to touch is effectively impossible because of the approvals, time and and Windows admin labor needed I makes more sense find a solution that allows me to work on my own terms.

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• WPF Layout algorithm woes - control will resize, but not below some arbitrary value.

  - by Quantumplation

  I'm working on an application for a client, and one of the requirements is the ability to make appointments, and display the current week's appointments in a visual format, much like in Google Calender's or Microsoft Office. I found a great (3 part) article on codeproject, in which he builds a "RangePanel", and composes one for each "period" (for example, the work day.) You can find part 1 here: http://www.codeproject.com/KB/WPF/OutlookWpfCalendarPart1.aspx The code presents, but seems to choose an arbitrary height value overall (440.04), and won't resize below that without clipping. What I mean to say, is that the window/container will resize, but it just cuts off the bottom of the control, instead of recalculating the height of the range panels, and the controls in the range panels representing the appointment. It will resize and recalculate for greater values, but not less. Code-wise, what's happening is that when you resize below that value, first the "MeasureOverride" is called with the correct "new height". However, by the time the "ArrangeOverride" method is called, it's passing the same 440.04 value as the height to arrange to. I need to find a solution/workaround, but any information that you can provide that might direct me for things to look into would also be greatly appreciated ( I understand how frustrating it is to debug code when you don't have the codebase in front of you. :) ) The code for the various Arrange and Measure functions are provided below. The "CalendarView" control has a "CalendarViewContentPresenter", which handles several periods. Then, the periods have a "CalendarPeriodContentPresenter", which handles each "block" of appointments. Finally, the "RangePanel" has it's own implementation. (To be honest, i'm still a bit hazy on how the control works, so if my explanations are a bit hazy, the article I linked probably has a more cogent explanation. :) ) CalendarViewContentPresenter: protected override Size ArrangeOverride(Size finalSize) { int columnCount = this.CalendarView.Periods.Count; Size columnSize = new Size(finalSize.Width / columnCount, finalSize.Height); double elementX = 0; foreach (UIElement element in this.visualChildren) { element.Arrange(new Rect(new Point(elementX, 0), columnSize)); elementX = elementX + columnSize.Width; } return finalSize; } protected override Size MeasureOverride(Size constraint) { this.GenerateVisualChildren(); this.GenerateListViewItemVisuals(); // If it's coming back infinity, just return some value. if (constraint.Width == Double.PositiveInfinity) constraint.Width = 10; if (constraint.Height == Double.PositiveInfinity) constraint.Height = 10; return constraint; } CalendarViewPeriodPersenter: protected override Size ArrangeOverride(Size finalSize) { foreach (UIElement element in this.visualChildren) { element.Arrange(new Rect(new Point(0, 0), finalSize)); } return finalSize; } protected override Size MeasureOverride(Size constraint) { this.GenerateVisualChildren(); return constraint; } RangePanel: protected override Size ArrangeOverride(Size finalSize) { double containerRange = (this.Maximum - this.Minimum); foreach (UIElement element in this.Children) { double begin = (double)element.GetValue(RangePanel.BeginProperty); double end = (double)element.GetValue(RangePanel.EndProperty); double elementRange = end - begin; Size size = new Size(); size.Width = (Orientation == Orientation.Vertical) ? finalSize.Width : elementRange / containerRange * finalSize.Width; size.Height = (Orientation == Orientation.Vertical) ? elementRange / containerRange * finalSize.Height : finalSize.Height; Point location = new Point(); location.X = (Orientation == Orientation.Vertical) ? 0 : (begin - this.Minimum) / containerRange * finalSize.Width; location.Y = (Orientation == Orientation.Vertical) ? (begin - this.Minimum) / containerRange * finalSize.Height : 0; element.Arrange(new Rect(location, size)); } return finalSize; } protected override Size MeasureOverride(Size availableSize) { foreach (UIElement element in this.Children) { element.Measure(availableSize); } // Constrain infinities if (availableSize.Width == double.PositiveInfinity) availableSize.Width = 10; if (availableSize.Height == double.PositiveInfinity) availableSize.Height = 10; return availableSize; }

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• Using MS Standalone profiler in VS2008 Professional

  - by fishdump

  I am trying to profile my .NET dll while running it from VS unit testing tools but I am having problems. I am using the standalone command-line profiler as VS2008 Professional does not come with an inbuilt profiler. I have an open CMD window and have run the following commands (I instrumented it earlier which is why vsinstr gave the warning that it did): C:\...\BusinessRules\obj\Debug>vsperfclrenv /samplegclife /tracegclife /globalsamplegclife /globaltracegclife Enabling VSPerf Sampling Attach Profiling. Allows to 'attaching' to managed applications. Current Profiling Environment variables are: COR_ENABLE_PROFILING=1 COR_PROFILER={0a56a683-003a-41a1-a0ac-0f94c4913c48} COR_LINE_PROFILING=1 COR_GC_PROFILING=2 C:\...\BusinessRules\obj\Debug>vsinstr BusinessRules.dll Microsoft (R) VSInstr Post-Link Instrumentation 9.0.30729 x86 Copyright (C) Microsoft Corp. All rights reserved. Error VSP1018 : VSInstr does not support processing binaries that are already instrumented. C:\...\BusinessRules\obj\Debug>vsperfcmd /start:trace /output:foo.vsp Microsoft (R) VSPerf Command Version 9.0.30729 x86 Copyright (C) Microsoft Corp. All rights reserved. C:\...\BusinessRules\obj\Debug> I then ran the unit tests that exercised the instrumented code. When the unit tests were complete, I did... C:\...\BusinessRules\obj\Debug>vsperfcmd /shutdown Microsoft (R) VSPerf Command Version 9.0.30729 x86 Copyright (C) Microsoft Corp. All rights reserved. Waiting for process 4836 ( C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\vstesthost.exe) to shutdown... It was clearly waiting for VS2008 to close so I closed it... Shutting down the Profile Monitor ------------------------------------------------------------ C:\...\BusinessRules\obj\Debug> All looking good, there was a 3.2mb foo.vsp file in the directory. I next did... C:\...\BusinessRules\obj\Debug>vsperfreport foo.vsp /summary:all Microsoft (R) VSPerf Report Generator, Version 9.0.0.0 Copyright (C) Microsoft Corporation. All rights reserved. VSP2340: Environment variables were not properly set during profiling run and managed symbols may not resolve. Please use vsperfclrenv before profiling. File opened Successfully opened the file. A report file, foo_Header.csv, has been generated. A report file, foo_MarksSummary.csv, has been generated. A report file, foo_ProcessSummary.csv, has been generated. A report file, foo_ThreadSummary.csv, has been generated. Analysis completed A report file, foo_FunctionSummary.csv, has been generated. A report file, foo_CallerCalleeSummary.csv, has been generated. A report file, foo_CallTreeSummary.csv, has been generated. A report file, foo_ModuleSummary.csv, has been generated. C:\...\BusinessRules\obj\Debug> Notice the warning about environment variables and using vsperfclrenv? But I had run it! Maybe I used the wrong switches? I don't know. Anyway, loading the csv files into Excel or using the perfconsole tool gives loads of useful info with useless symbol names: *** Loading commands from: C:\temp\PerfConsole\bin\commands\timebytype.dll *** Adding command: timebytype *** Loading commands from: C:\temp\PerfConsole\bin\commands\partition.dll *** Adding command: partition Welcome to PerfConsole 1.0 (for bugs please email: [email protected]), for help type: ?, for a quickstart type: ?? > load foo.vsp *** Couldn't match to either expected sampled or instrumented profile schema, defaulting to sampled *** Couldn't match to either expected sampled or instrumented profile schema, defaulting to sampled *** Profile loaded from 'foo.vsp' into @foo > > functions @foo >>>>> Function Name Exclusive Inclusive Function Name Module Name -------------------- -------------------- -------------- --------------- 900,798,600,000.00 % 900,798,600,000.00 % 0x0600003F 20397910 14,968,500,000.00 % 44,691,540,000.00 % 0x06000040 14736385 8,101,253,000.00 % 14,836,330,000.00 % 0x06000041 5491345 3,216,315,000.00 % 6,876,929,000.00 % 0x06000042 3924533 <snip> 71,449,430.00 % 71,449,430.00 % 0x0A000074 42572 52,914,200.00 % 52,914,200.00 % 0x0A000073 0 14,791.00 % 13,006,010.00 % 0x0A00007B 0 199,177.00 % 6,082,932.00 % 0x2B000001 5350072 2,420,116.00 % 2,420,116.00 % 0x0A00008A 0 836.00 % 451,888.00 % 0x0A000045 0 9,616.00 % 399,436.00 % 0x0A000039 0 18,202.00 % 298,223.00 % 0x06000046 1479900 I am so close to being able to find the bottlenecks, if only it will give me the function and module names instead of hex numbers! What am I doing wrong? --- Alistair.

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• Perl Scripts Seem to be Caching?

  - by Ben Liyanage

  I'm running a perl script via mod_perl with Apache. I am trying to parse parameters in a restful fashion (aka GET www.domain.com/rest.pl/Object/ID). If I specify the ID like this: GET www.domain.com/rest.pl/Object/1234 I will get object 1234 back as a result as expected. However, if I specify an incorrect hacked url like this GET www.domain.com/rest.pl/Object/123 I will also get back object 1234. I am pretty sure that the issue in this question is happening so I packaged up my method and invoked it from my core script out of the package. Even after that I am still seeing the threads returning seemingly cached data. One of the recommendations in the aforementioned article is to replace my with our. My impression from reading up on our vs my was that our is global and my is local. My assumption is the the local variable gets reinitialized each time. That said, like in my code example below I am resetting the variables each time with new values. Apache Perl Configuration is set up like this: PerlModule ModPerl::Registry <Directory /var/www/html/perl/> SetHandler perl-script PerlHandler ModPerl::Registry Options +ExecCGI </Directory> Here is the perl script getting invoked directly: #!/usr/bin/perl -w use strict; use warnings; use Rest; Rest::init(); Here is my package Rest. This file contains various functions for handling the rest requests. #!/usr/bin/perl -w package Rest; use strict; # Other useful packages declared here. our @EXPORT = qw( init ); our $q = CGI->new; sub GET($$) { my ($path, $code) = @_; return unless $q->request_method eq 'GET' or $q->request_method eq 'HEAD'; return unless $q->path_info =~ $path; $code->(); exit; } sub init() { eval { GET qr{^/ZonesByCustomer/(.+)$} => sub { Rest::Zone->ZonesByCustomer($1); } } } # packages must return 1 1; As a side note, I don't completely understand how this eval statement works, or what string is getting parsed by the qr command. This script was largely taken from this example for setting up a rest based web service with perl. I suspect it is getting pulled from that magical $_ variable, but I'm not sure if it is, or what it is getting populated with (clearly the query string or url, but it only seems to be part of it?). Here is my package Rest::Zone, which will contain the meat of the functional actions. I'm leaving out the specifics of how I'm manipulating the data because it is working and leaving this as an abstract stub. #!/usr/bin/perl -w package Rest::Zone; sub ZonesByCustomer($) { my ($className, $ObjectID) = @_; my $q = CGI->new; print $q->header(-status=>200, -type=>'text/xml',expires => 'now', -Cache_control => 'no-cache', -Pragma => 'no-cache'); my $objectXML = "<xml><object>" . $ObjectID . "</object></xml>"; print $objectXML; } # packages must return 1 1; What is going on here? Why do I keep getting stale or cached values?

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• Inconsistent responses from ISAPI DLL in mod_isapi.

  - by William Leader

  I have a ISAPI dll which I created with Delphi 2009, and I have been able to test that it functions as designed when I run it inside of IIS 5.1. However when I attempt to host the web service from within Apache on Windows XP using mod_isapi, I do not get consistent results. The ISAPI dll implements a very simple SOAP service with two methods. One method is a simple echo service that sends back the string sent to it. The second method is used to send a file to the server using a TSoapAttachement (Mutipart MIME). The interface can be descibes as follows IPdiSvc2 = interface(IInvokable) ['{532DCDD7-D66B-4D2C-924E-2F389D3E0A74}'] function Echo(data:string): string; stdcall; function SendFile(request:TFileDescription; attachment: TSOAPAttachment): TSendFileResponse; stdcall; end; What is interesting is if I only call the echo function Apache handles this without error every time. The webservice only returns an error after calling send File, but not every time. There are three outcomes to calling send file that I have observed: A normal result without an error (HTTP 200 OK). A Soap encoded exception with the message: 'Required white space was missing. Line: 11 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML.' (HTTP 500 Internal Error). This also generates a message in the Apache error.log 'Premature end of script headers: MYISAPI.dll' A Soap encoded exception with the message: 'Access violation at address 01A53D57 in module MYISAPI.dll. Read of address 00000000.' (HTTP 200 OK). What I find interesting is that the second third outcomes still occur if I call echo after calling send file. Calling SendFile, SendFile, SendFile, SendFile results in outcomes 1, 2, 3, 1. Calling Echo, SendFile, SendFile, SendFile results in outcomes 1, 1, 2, 3. Calling SendFile, Echo, Echo, SendFile results in outcomes 1, 2, 3, 1. The pattern I am seing is that after a Successful SendFile, the next to requests result in outcomes 2 and 3 regardless of what those two requests are. My guess is that because Apache uses multiple threads to handle multiple requests that each request is getting handled in a slightly different way, and that the DLL may not have been initialized in the same way for each worker thread. I do not think the problem exists in my code as when I attach the debugger to httpd.exe it does recognize the exceptions but it says the exceptions are in non-delphi code meaning that they are happening before the code inside my DLL has a chance to execute. I suspect it may have something to do with the way I have apache configured. My Apache configuration is the defaults created by the 2.2.15 installer for windows with the following addition: <IfModule isapi_module> AddHandler isapi-handler .dll ISAPILogNotSupported on ISAPIFakeAsync on ISAPIAppendLogToErrors on </IfModule> <IfModule alias_module> ScriptAlias /myisapi/ "C:/path/to/myisapi/" </IfModule> <Directory "C:/path/to/myisapi/"> AllowOverride None Options ExecCGI Order allow,deny Allow from all </Directory>

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• C++ custom exceptions: run time performance and passing exceptions from C++ to C

  - by skyeagle

  I am writing a custom C++ exception class (so I can pass exceptions occuring in C++ to another language via a C API). My initial plan of attack was to proceed as follows: //C++ myClass { public: myClass(); ~myClass(); void foo() // throws myException int foo(const int i, const bool b) // throws myException } * myClassPtr; // C API #ifdef __cplusplus extern "C" { #endif myClassPtr MyClass_New(); void MyClass_Destroy(myClassPtr p); void MyClass_Foo(myClassPtr p); int MyClass_FooBar(myClassPtr p, int i, bool b); #ifdef __cplusplus }; #endif I need a way to be able to pass exceptions thrown in the C++ code to the C side. The information I want to pass to the C side is the following: (a). What (b). Where (c). Simple Stack Trace (just the sequence of error messages in order they occured, no debugging info etc) I want to modify my C API, so that the API functions take a pointer to a struct ExceptionInfo, which will contain any exception info (if an exception occured) before consuming the results of the invocation. This raises two questions: Question 1 1. Implementation of each of the C++ methods exposed in the C API needs to be enclosed in a try/catch statement. The performance implications for this seem quite serious (according to this article): "It is a mistake (with high runtime cost) to use C++ exception handling for events that occur frequently, or for events that are handled near the point of detection." At the same time, I remember reading somewhere in my C++ days, that all though exception handling is expensive, it only becmes expensive when an exception actually occurs. So, which is correct?. what to do?. Is there an alternative way that I can trap errors safely and pass the resulting error info to the C API?. Or is this a minor consideration (the article after all, is quite old, and hardware have improved a bit since then). Question 2 I wuld like to modify the exception class given in that article, so that it contains a simple stack trace, and I need some help doing that. Again, in order to make the exception class 'lightweight', I think its a good idea not to include any STL classes, like string or vector (good idea/bad idea?). Which potentially leaves me with a fixed length C string (char*) which will be stack allocated. So I can maybe just keep appending messages (delimted by a unique separator [up to maximum length of buffer])... Its been a while since I did any serious C++ coding, and I will be grateful for the help. BTW, this is what I have come up with so far (I am intentionally, not deriving from std::exception because of the performance reasons mentioned in the article, and I am instead, throwing an integral exception (based on an exception enumeration): class fast_exception { public: fast_exception(int what, char const* file=0, int line=0) : what_(what), line_(line), file_(file) {/*empty*/} int what() const { return what_; } int line() const { return line_; } char const* file() const { return file_; } private: int what_; int line_; char const[MAX_BUFFER_SIZE] file_; }

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• How to Zip one IEnumerable with itself

  - by wageoghe

  I am implementing some math algorithms based on lists of points, like Distance, Area, Centroid, etc. Just like in this post: http://stackoverflow.com/questions/2227828/find-the-distance-required-to-navigate-a-list-of-points-using-linq That post describes how to calculate the total distance of a sequence of points (taken in order) by essentially zipping the sequence "with itself", generating the sequence for Zip by offsetting the start position of the original IEnumerable by 1. So, given the Zip extension in .Net 4.0, assuming Point for the point type, and a reasonable Distance formula, you can make calls like this to generate a sequence of distances from one point to the next and then to sum the distances: var distances = points.Zip(points.Skip(1),Distance); double totalDistance = distances.Sum(); Area and Centroid calculations are similar in that they need to iterate over the sequence, processing each pair of points (points[i] and points[i+1]). I thought of making a generic IEnumerable extension suitable for implementing these (and possibly other) algorithms that operate over sequences, taking two items at a time (points[0] and points[1], points[1] and points[2], ..., points[n-1] and points[n] (or is it n-2 and n-1 ...) and applying a function. My generic iterator would have a similar signature to Zip, but it would not receive a second sequence to zip with as it is really just going to zip with itself. My first try looks like this: public static IEnumerable<TResult> ZipMyself<TSequence, TResult>(this IEnumerable<TSequence> seq, Func<TSequence, TSequence, TResult> resultSelector) { return seq.Zip(seq.Skip(1),resultSelector); } With my generic iterator in place, I can write functions like this: public static double Length(this IEnumerable<Point> points) { return points.ZipMyself(Distance).Sum(); } and call it like this: double d = points.Length(); and double GreensTheorem(Point p1, Point p1) { return p1.X * p2.Y - p1.Y * p2.X; } public static double SignedArea(this IEnumerable<Point> points) { return points.ZipMyself(GreensTheorem).Sum() / 2.0 } public static double Area(this IEnumerable<Point> points) { return Math.Abs(points.SignedArea()); } public static bool IsClockwise(this IEnumerable<Point> points) { return SignedArea(points) < 0; } and call them like this: double a = points.Area(); bool isClockwise = points.IsClockwise(); In this case, is there any reason NOT to implement "ZipMyself" in terms of Zip and Skip(1)? Is there already something in LINQ that automates this (zipping a list with itself) - not that it needs to be made that much easier ;-) Also, is there better name for the extension that might reflect that it is a well-known pattern (if, indeed it is a well-known pattern)? Had a link here for a StackOverflow question about area calculation. It is question 2432428. Also had a link to Wikipedia article on Centroid. Just go to Wikipedia and search for Centroid if interested. Just starting out, so don't have enough rep to post more than one link,

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• RegLoadAppKey working fine on 32-bit OS, failing on 64-bit OS, even if both processes are 32-bit

  - by James Manning

  I'm using .NET 4 and the new RegistryKey.FromHandle call so I can take the hKey I get from opening a registry file with RegLoadAppKey and operate on it with the existing managed API. I thought at first it was just a matter of a busted DllImport and my call had an invalid type in the params or a missing MarshalAs or whatever, but looking at other registry functions and their DllImport declarations (for instance, on pinvoke.net), I don't see what else to try (I've had hKey returned as both int and IntPtr, both worked on 32-bit OS and fail on 64-bit OS) I've got it down to as simple a repro case as I can - it just tries to create a 'random' subkey then write a value to it. It works fine on my Win7 x86 box and fails on Win7 x64 and 2008 R2 x64, even when it's still a 32-bit process, even run from a 32-bit cmd prompt. EDIT: It also fails in the same way if it's a 64-bit process. on Win7 x86: INFO: Running as Admin in 32-bit process on 32-bit OS Was able to create Microsoft\Windows\CurrentVersion\RunOnceEx\a95b1bbf-7a04-4707-bcca-6aee6afbfab7 and write a value under it on Win7 x64, as 32-bit: INFO: Running as Admin in 32-bit process on 64-bit OS Unhandled Exception: System.UnauthorizedAccessException: Access to the registry key '\Microsoft\Windows\CurrentVersion\RunOnceEx\ce6d5ff6-c3af-47f7-b3dc-c5a1b9a3cd22' is denied. at Microsoft.Win32.RegistryKey.Win32Error(Int32 errorCode, String str) at Microsoft.Win32.RegistryKey.CreateSubKeyInternal(String subkey, RegistryKeyPermissionCheck permissionCheck, Object registrySecurityObj, RegistryOptions registryOptions) at Microsoft.Win32.RegistryKey.CreateSubKey(String subkey) at LoadAppKeyAndModify.Program.Main(String[] args) on Win7 x64, as 64-bit: INFO: Running as Admin in 64-bit process on 64-bit OS Unhandled Exception: System.UnauthorizedAccessException: Access to the registry key '\Microsoft\Windows\CurrentVersion\RunOnceEx\43bc857d-7d07-499c-8070-574d6732c130' is denied. at Microsoft.Win32.RegistryKey.Win32Error(Int32 errorCode, String str) at Microsoft.Win32.RegistryKey.CreateSubKeyInternal(String subkey, RegistryKeyPermissionCheck permissionCheck, Object registrySecurityObj, RegistryOptions registryOptions) at Microsoft.Win32.RegistryKey.CreateSubKey(String subkey, RegistryKeyPermissionCheck permissionCheck) at LoadAppKeyAndModify.Program.Main(String[] args) source: class Program { static void Main(string[] args) { Console.WriteLine("INFO: Running as {0} in {1}-bit process on {2}-bit OS", new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator) ? "Admin" : "Normal User", Environment.Is64BitProcess ? 64 : 32, Environment.Is64BitOperatingSystem ? 64 : 32); if (args.Length != 1) { throw new ApplicationException("Need 1 argument - path to the software hive file on disk"); } string softwareHiveFile = Path.GetFullPath(args[0]); if (File.Exists(softwareHiveFile) == false) { throw new ApplicationException("Specified file does not exist: " + softwareHiveFile); } // pick a random subkey so it doesn't already exist var keyPathToCreate = "Microsoft\\Windows\\CurrentVersion\\RunOnceEx\\" + Guid.NewGuid(); var hKey = RegistryNativeMethods.RegLoadAppKey(softwareHiveFile); using (var safeRegistryHandle = new SafeRegistryHandle(new IntPtr(hKey), true)) using (var appKey = RegistryKey.FromHandle(safeRegistryHandle)) using (var runOnceExKey = appKey.CreateSubKey(keyPathToCreate)) { runOnceExKey.SetValue("foo", "bar"); Console.WriteLine("Was able to create {0} and write a value under it", keyPathToCreate); } } } internal static class RegistryNativeMethods { [Flags] public enum RegSAM { AllAccess = 0x000f003f } private const int REG_PROCESS_APPKEY = 0x00000001; // approximated from pinvoke.net's RegLoadKey and RegOpenKey // NOTE: changed return from long to int so we could do Win32Exception on it [DllImport("advapi32.dll", SetLastError = true)] private static extern int RegLoadAppKey(String hiveFile, out int hKey, RegSAM samDesired, int options, int reserved); public static int RegLoadAppKey(String hiveFile) { int hKey; int rc = RegLoadAppKey(hiveFile, out hKey, RegSAM.AllAccess, REG_PROCESS_APPKEY, 0); if (rc != 0) { throw new Win32Exception(rc, "Failed during RegLoadAppKey of file " + hiveFile); } return hKey; } }

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• Doing CRUD on XML using id attributes in C# ASP.NET

  - by Brandon G

  I'm a LAMP guy and ended up working this small news module for an asp.net site, which I am having some difficulty with. I basically am adding and deleting elements via AJAX based on the id. Before, I had it working based on the the index of a set of elements, but would have issues deleting, since the index would change in the xml file and not on the page (since I am using ajax). Here is the rundown news.xml <?xml version="1.0" encoding="utf-8"?> <news> <article id="1"> <title>Red Shield Environmental implements the PARCSuite system</title> <story>Add stuff here</story> </article> <article id="2"> <title>Catalyst Paper selects PARCSuite for its Mill-Wide Process...</title> <story>Add stuff here</story> </article> <article id="3"> <title>Weyerhaeuser uses Capstone Technology to provide Control...</title> <story>Add stuff here</story> </article> </news> Page sending del request: <script type="text/javascript"> $(document).ready(function () { $('.del').click(function () { var obj = $(this); var id = obj.attr('rel'); $.post('add-news-item.aspx', { id: id }, function () { obj.parent().next().remove(); obj.parent().remove(); } ); }); }); </script> <a class="del" rel="1">...</a> <a class="del" rel="1">...</a> <a class="del" rel="1">...</a> My functions protected void addEntry(string title, string story) { XmlDocument news = new XmlDocument(); news.Load(Server.MapPath("../news.xml")); XmlAttributeCollection ids = news.Attributes; //Create a new node XmlElement newelement = news.CreateElement("article"); XmlElement xmlTitle = news.CreateElement("title"); XmlElement xmlStory = news.CreateElement("story"); XmlAttribute id = ids[0]; int myId = int.Parse(id.Value + 1); id.Value = ""+myId; newelement.SetAttributeNode(id); xmlTitle.InnerText = this.TitleBox.Text.Trim(); xmlStory.InnerText = this.StoryBox.Text.Trim(); newelement.AppendChild(xmlTitle); newelement.AppendChild(xmlStory); news.DocumentElement.AppendChild(newelement); news.Save(Server.MapPath("../news.xml")); } protected void deleteEntry(int selectIndex) { XmlDocument news = new XmlDocument(); news.Load(Server.MapPath("../news.xml")); XmlNode xmlnode = news.DocumentElement.ChildNodes.Item(selectIndex); xmlnode.ParentNode.RemoveChild(xmlnode); news.Save(Server.MapPath("../news.xml")); } I haven't updated deleteEntry() and you can see, I was using the array index but need to delete the article element based on the article id being passed. And when adding an entry, I need to set the id to the last elements id + 1. Yes, I know SQL would be 100 times easier, but I don't have access so... help?

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• How to create an array of User Objects in Powerbuilder?

  - by TomatoSandwich

  The application has many different windows. One is a single 'row' window, which relates to a single row of data in a table, say 'Order'. Another is a 'multiple row' datawindow, where each row in the datawindow relates to a row in 'Order', used for spreadsheet-like data entry Functionality extentions have create a detail table, say 'Suppliers', where an order may require multiple suppliers to fill the order. Normally, suppliers are not required, because they are already in the warehouse (0), or there may need to be an order to a supplier to complete an order (1), or multiple suppliers may need to be contacted (more than one). As a single order is entered, once the items are entered, a User Object is populated depending on the status of the items in the warehouse. If required, this creates a 1-to-many relationship between the order and the "backorder". In the PB side, there is a single object uo_backorder which is created on the window, and is referenced by the window depending on the command (button popup, save, etc) I have been tasked to create the 'backorder' functionality on the spreadsheet-line window. Previously the default options for backorders were used when orders were created from the multiple-row window. A workaround already exists where unconfirmed orders could be opened in the single-row window, and the backorder information manipulated there. However, the userbase wants this functionality on the one window. Since the functionality of uo_backorder already exists, I assumed I could just copy the code from the single-order window, but create an array of uo_backorder objects to cope with multiple rows. I tried the following: forward .. type uo_backorder from popupdwpb within w_order_conv end type end forward global type w_order_conv from singleform .. uo_backorder uo_backorder end type type variables .. uo_backorder iuo_backorders[] end variables .. public function boolean iuo_backorders(); .. long ll_count ll_count = UpperBound(iuo_backorders[]) iuo_backorders[ll_count+1] = uo_backorder //THIS ISN'T RIGHT lb_ok = iuo_backorders[ll_count+1].init('w_backorder_popup', '', '', '', 'd_backorder_popup', sqlca, useTransObj()) return lb_ok end function .. <utility functions> .. type uo_backorder from popupdwpb within w_order_conv integer x = 28 integer y = 28 integer width ... end type on uo_backorder.destroy call popupdwpb::destroy end on The issue I face now is that the code commented "THIS ISN'T RIGHT" isn't correct. It is associating the visual object placed on the face of the main window to each array cell, so anytime I reference the array cell object it's actually referencing the one original object, not the new instances that I (thought) I was creating. If I change the code iuo_backorders[ll_count+1] = create uo_backorder the code doesn't run, saying that it failed to initalize the popup window. I think this is related to the class being called the same thing as the instance. What I want to end up with is an array of uo_backorder objects that I can associate to each row of my datawindow (first row = first cell, etc). I think the issue lays in the fact it's a visual object, and I can't seem to get the window to run without adding a dummy object on the face of the window (functionality from the original single-row window). Since it's a VISUAL object, does the object indeed need to be embedded on the windowface for the window to know what object I'm talking about? If so, how does one create multiple windowface objects (one to many, depending on when a row is added)? Don't hesitate to inquire regarding any more information this issue may require from myself. I have no idea what is 'standard' or 'default' in PB, or what is custom and needs more explaining.

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• Android using ksoap calling PHP SOAP webservice fails: 'procedure 'CheckLogin' not found

  - by AmazingDreams

  I'm trying to call a PHP SOAP webservice. I know my webservice functions correctly because I use it in a WPF project succesfully. I'm also building an app in android, using the same webservice. The WSDL file can be found here: http://www.wegotcha.nl/servicehandler/service.wsdl This is my code in the android app: String SOAP_ACTION = "http://www.wegotcha.nl/servicehandler/CheckLogin"; String NAMESPACE = "http://www.wegotcha.nl/servicehandler"; String METHOD_NAME = "CheckLogin"; String URL = "http://www.wegotcha.nl/servicehandler/servicehandler.php"; String resultData = ""; SoapSerializationEnvelope soapEnv = new SoapSerializationEnvelope(SoapEnvelope.VER11); SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME); SoapObject UserCredentials = new SoapObject("Types", "UserCredentials6"); UserCredentials.addProperty("mail", params[0]); UserCredentials.addProperty("password", md5(params[1])); request.addSoapObject(UserCredentials); soapEnv.setOutputSoapObject(request); HttpTransportSE http = new HttpTransportSE(URL); http.setXmlVersionTag("<?xml version=\"1.0\" encoding=\"utf-8\"?>"); http.debug = true; try { http.call(SOAP_ACTION, soapEnv); } catch (IOException e) { e.printStackTrace(); } catch (XmlPullParserException e) { e.printStackTrace(); } SoapObject results = null; results = (SoapObject)soapEnv.bodyOut; if(results != null) resultData = results.getProperty(0).toString(); return resultData; Using fiddler I got the following: Android request: <?xml version="1.0" encoding="utf-8"?> <v:Envelope xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:d="http://www.w3.org/2001/XMLSchema" xmlns:c="http://schemas.xmlsoap.org/soap/encoding/" xmlns:v="http://schemas.xmlsoap.org/soap/envelope/"><v:Header /> <v:Body> <n0:CheckLogin id="o0" c:root="1" xmlns:n0="http://www.wegotcha.nl/servicehandler"> <n1:UserCredentials6 i:type="n1:UserCredentials6" xmlns:n1="Types"> <mail i:type="d:string">myemail</mail> <password i:type="d:string">myhashedpass</password> </n1:UserCredentials6> </n0:CheckLogin> </v:Body> </v:Envelope> Getting the following response: Procedure 'CheckLogin' not present My request produced by my WPF app looks completely different: <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <UserCredentials6 xmlns="Types"> <mail>mymail</mail> <password>mypassword</password> </UserCredentials6> </s:Body> </s:Envelope> After googling my ass off I was not able to solve this problem by myself. It may be possible there are some weird things in my Java code because I changed a lot since. I hope you guys will be able to help me, thanks. EDIT: My webservice is of document/literal encoding style, after doing some research I found I should be able to use SoepEnvelope Instead of SoapSerializationEnvelope Though when I replace this I get an error before the try cache block, causing my app to crash. Error: 11-04 16:23:26.786: E/AndroidRuntime(26447): Caused by: java.lang.ClassCastException: org.ksoap2.serialization.SoapObject cannot be cast to org.kxml2.kdom.Node Which is caused by these lines: request.addSoapObject(UserCredentials); soapEnv.setOutputSoapObject(request); This may be a solution though, how do I go about this? I found nothing about using a SoapEnvelope instead of a SoapSerializationEnvelope except for this awesome tutorial: http://ksoap.objectweb.org/project/mailingLists/ksoap/msg00849.html

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• Cannot get UISearchBar Scope Bar to appear in Toolbar (or anywhere) on iPad

  - by Jann

  This is really causing me fits. I see a lot of info on putting a UISearchBar in the top row of a UITableView -- but I am putting the UISearchBar into the Toolbar at the top of my screen (on the iPad). I cannot find ANYTHING regarding how to handle UISearchBar and UISearchDisplayController using a UIPopoverController on the iPad. Any more info about the UISearchDisplayController using a UIPopoverController would be greatly appreciated. Please help with this as I am at my wit's end. Using IB, I put a toolbar on the IUView on the iPad. I added the following: Search Bar (not Search Bar and Search Display) to the toolbar. I set the options to be as follows: Show Cancel Button, Show Scope Bar, Scope Button Titles are: "Title1" and "Title2" (with Title2's radio button selected). Opaque, Clear Context and Auto Resize are checked. I hooked up the delegate of Search Bar to the "File's Owner" and linked it to IBOutlet theSearchBar. In my viewWillAppear I have the following: //Just in case: [theSearchBar setScopeButtonTitles:[NSArray arrayWithObjects:@"Near Me",@"Everywhere",nil]]; //Just in case (again): [theSearchBar setShowsScopeBar:YES]; //doesn't seem to do anything: //[theSearchBar sizeToFit]; searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:theSearchBar contentsController:self]; [self setSearchDisplayController:searchDisplayController]; [searchDisplayController setDelegate:self]; [searchDisplayController setSearchResultsDataSource:self]; //again--does not seem to do anything..but people have suggested it: [theSearchBar sizeToFit]; Okay, so far, I thought, so good. So, I made the File's Owner .m file to be a delegate for: UISearchBarDelegate, UISearchDisplayDelegate. My issue: I have yet to implement the delegates necessary to do the search but still... shouldn't I be seeing the scopeBar next to the search field when I click into the search field? Just so you know I DO see the log of the characters I type, so the delegate is working. I have the following dummy functions in the .m file (just in case) // called when keyboard search button pressed - (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar { NSLog(@"Search Button Clicked\n"); [theSearchBar resignFirstResponder]; } // called when cancel button pressed - (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar { NSLog(@"Cancel Button Clicked\n"); [theSearchBar resignFirstResponder]; } - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText { NSLog(@"Search Text So Far: '%@'\n",searchText); } - (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar { return YES; } - (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar { return YES; } Why doesn't the Scope Bar appear? A results UIPopoverController appears with the title "Results" and "No results found" (of course) when i type the first character in my search...but no scope bar. (not that i expect anything other than "No Results Found". I am wondering where the scope bar is supposed to appear...in the titleView of the UIPopover? In the toolbar to the right of the search area? Where?

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• iPhone SDK 3.0 and symbolicatecrash not getting along?

  - by Steve

  * UPDATE * I've reinstalled with Snow Leopard, clean install. Completely wiped my existing Leopard install. Same problem persists. I've tried numbers of versions of symbolicatecrash to resolve symbols in my crash reports. From the version provided by Apple, to Alan's Quatermain's version posted on GitHub and finally from http://openradar.appspot.com/6438643. For whatever reason, the best results I can get is for symbols on my own libraries to get resolved. Normally, this is enough data to point me in the right direction -- other times it is not. With 2.x I had no problems getting the symbols for my code + Apple provided libraries from within the stack traces in each thread. Most likely an issue with my environment here, I'm not at all doubting the work that Apple or Alan have done. Yes I'm certain the dSYM I have stashed away is the same exact one that's generating the crash report. Although 'Foo' is me, and getting symbols from it is wonderful, I need to see symbols from the other functions in the stack to truly understand my reports. Note: For devices that crash running the app on iPhone OS 2.2.1, I have no problem getting all symbols. This is an iPhone OS 3.0 issue it appears. Also, while running symbolicatecrash in verbose mode here's a few of the things that struck me as wrong: - NO MATCH NOT searching in Spotlight for dsym with UUID of /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation ## Warning: Can't find any unstripped binary that matches version of /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation ..........fetching symbol file for libobjc.A.dylib--[undef] Searching [/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0 (5A345)/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0 (5A347)/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0.1 (5B108)/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0.2 (5C1)/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.1.1/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.1/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.2.1/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.2/Symbols/usr/lib/libobjc.A.dylib /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0 (7A341)/Symbols/usr/lib/libobjc.A.dylib]...--[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0 (5A345)/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0 (5A347)/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0.1 (5B108)/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.0.2 (5C1)/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.1.1/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.1/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.2.1/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/2.2/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH --[/Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0 (7A341)/Symbols/usr/lib/libobjc.A.dylib] -- NO MATCH NOT searching in Spotlight for dsym with UUID of /usr/lib/libobjc.A.dylib ## Warning: Can't find any unstripped binary that matches version of /usr/lib/libobjc.A.dylib Here's an example of the crash report after running it through symbolicatecrash: Thread 0 Crashed: 0 libSystem.B.dylib 0x31dc476c 0x31d46000 + 517996 1 libSystem.B.dylib 0x31dc4755 0x31d46000 + 517973 2 Foo 0x00053075 uncaught_exception_handler + 21 3 CoreFoundation 0x3028f65f 0x301fd000 + 599647 4 libobjc.A.dylib 0x30013693 0x3000c000 + 30355 5 libstdc++.6.dylib 0x374ccc2d 0x3748a000 + 273453 6 libstdc++.6.dylib 0x374ccc81 0x3748a000 + 273537 7 libstdc++.6.dylib 0x374ccd4d 0x3748a000 + 273741 8 libobjc.A.dylib 0x300135ff 0x3000c000 + 30207 9 CoreFoundation 0x30222f2d 0x301fd000 + 155437 10 CoreFoundation 0x30222ecb 0x301fd000 + 155339 11 Foundation 0x30521e33 0x30501000 + 134707 12 Foundation 0x30570d47 0x30501000 + 458055 13 Foo 0x0000a1db -[Bar barfoo] (Bar.m:1617) 14 Foo 0x00032f73 -[MyViewController foobar] (MyViewController.m:727) 15 Foo 0x000329b9 -[MyViewController foobar] (MyViewController.m:666) 16 Foo 0x00031fab -[MyViewController tabBar:tabSelected:] (MyViewController.m:440) 17 Foo 0x00068d41 -[TTTabBar setSelectedTabIndex:] (TTTabBar.m:160) 18 Foo 0x00068ca3 -[TTTabBar setSelectedTabView:] (TTTabBar.m:142) 19 Foo 0x000689cf -[TTTabBar tabTouchedUp:] (TTTabBar.m:83) 20 CoreFoundation 0x302552f9 0x301fd000 + 361209 21 UIKit 0x3094d101 0x308ed000 + 393473 22 UIKit 0x3094d0a1 0x308ed000 + 393377 23 UIKit 0x3094d073 0x308ed000 + 393331 24 UIKit 0x3094cdcd 0x308ed000 + 392653 25 UIKit 0x309779c1 0x308ed000 + 567745 26 UIKit 0x30977011 0x308ed000 + 565265 27 UIKit 0x309767d9 0x308ed000 + 563161 28 UIKit 0x30923613 0x308ed000 + 222739 29 UIKit 0x30923163 0x308ed000 + 221539 30 GraphicsServices 0x32045a4d 0x32041000 + 19021 31 CoreFoundation 0x30253041 0x301fd000 + 352321 32 CoreFoundation 0x30252771 0x301fd000 + 350065 33 GraphicsServices 0x32044b0f 0x32041000 + 15119 34 GraphicsServices 0x32044bbb 0x32041000 + 15291 35 UIKit 0x308f0363 0x308ed000 + 13155 36 UIKit 0x308ef121 0x308ed000 + 8481 37 Foo 0x00002097 main (main.m:13)

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• Samplegrabber works fine on AVI/MPEG files but choppy with WMV

  - by jomtois

  I have been using the latest version of the WPFMediaKit. What I am trying to do is write a sample application that will use the Samplegrabber to capture the video frames of video files so I can have them as individual Bitmaps. So far, I have had good luck with the following code when constructing and rendering my graph. However, when I use this code to play back a .wmv video file, when the samplegrabber is attached, it will play back jumpy or choppy. If I comment out the line where I add the samplegrabber filter, it works fine. Again, it works with the samplegrabber correctly with AVI/MPEG, etc. protected virtual void OpenSource() { FrameCount = 0; /* Make sure we clean up any remaining mess */ FreeResources(); if (m_sourceUri == null) return; string fileSource = m_sourceUri.OriginalString; if (string.IsNullOrEmpty(fileSource)) return; try { /* Creates the GraphBuilder COM object */ m_graph = new FilterGraphNoThread() as IGraphBuilder; if (m_graph == null) throw new Exception("Could not create a graph"); /* Add our prefered audio renderer */ InsertAudioRenderer(AudioRenderer); var filterGraph = m_graph as IFilterGraph2; if (filterGraph == null) throw new Exception("Could not QueryInterface for the IFilterGraph2"); IBaseFilter renderer = CreateVideoMixingRenderer9(m_graph, 1); IBaseFilter sourceFilter; /* Have DirectShow find the correct source filter for the Uri */ var hr = filterGraph.AddSourceFilter(fileSource, fileSource, out sourceFilter); DsError.ThrowExceptionForHR(hr); /* We will want to enum all the pins on the source filter */ IEnumPins pinEnum; hr = sourceFilter.EnumPins(out pinEnum); DsError.ThrowExceptionForHR(hr); IntPtr fetched = IntPtr.Zero; IPin[] pins = { null }; /* Counter for how many pins successfully rendered */ int pinsRendered = 0; m_sampleGrabber = (ISampleGrabber)new SampleGrabber(); SetupSampleGrabber(m_sampleGrabber); hr = m_graph.AddFilter(m_sampleGrabber as IBaseFilter, "SampleGrabber"); DsError.ThrowExceptionForHR(hr); /* Loop over each pin of the source filter */ while (pinEnum.Next(pins.Length, pins, fetched) == 0) { if (filterGraph.RenderEx(pins[0], AMRenderExFlags.RenderToExistingRenderers, IntPtr.Zero) >= 0) pinsRendered++; Marshal.ReleaseComObject(pins[0]); } Marshal.ReleaseComObject(pinEnum); Marshal.ReleaseComObject(sourceFilter); if (pinsRendered == 0) throw new Exception("Could not render any streams from the source Uri"); /* Configure the graph in the base class */ SetupFilterGraph(m_graph); HasVideo = true; /* Sets the NaturalVideoWidth/Height */ //SetNativePixelSizes(renderer); } catch (Exception ex) { /* This exection will happen usually if the media does * not exist or could not open due to not having the * proper filters installed */ FreeResources(); /* Fire our failed event */ InvokeMediaFailed(new MediaFailedEventArgs(ex.Message, ex)); } InvokeMediaOpened(); } And: private void SetupSampleGrabber(ISampleGrabber sampleGrabber) { FrameCount = 0; var mediaType = new AMMediaType { majorType = MediaType.Video, subType = MediaSubType.RGB24, formatType = FormatType.VideoInfo }; int hr = sampleGrabber.SetMediaType(mediaType); DsUtils.FreeAMMediaType(mediaType); DsError.ThrowExceptionForHR(hr); hr = sampleGrabber.SetCallback(this, 0); DsError.ThrowExceptionForHR(hr); } I have read a few things saying the the .wmv or .asf formats are asynchronous or something. I have attempted inserting a WMAsfReader to decode which works, but once it goes to the VMR9 it gives the same behavior. Also, I have gotten it to work correctly when I comment out the IBaseFilter renderer = CreateVideoMixingRenderer9(m_graph, 1); line and have filterGraph.Render(pins[0]); -- the only drawback is that now it renders in an Activemovie widow of its own instead of my control, however the samplegrabber functions correctly and without any skipping. So I am thinking the bug is in the VMR9 / samplegrabbing somewhere. Any help? I am new to this.

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• Android webview doesn't playing mp4 video in same page

  - by user1668105

  I'm trying to show one local html file contains code for playing video and try to show that html file in android webview. I've used following code to for playing video: WebViewLoadVideoActivity.java //DECLARE webview variable outside of onCreate function so we can access it in other functions (menu) @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); WebView webView = (WebView) findViewById(R.id.webView1); WebSettings webSettings = webView.getSettings(); // Fetches the // WebSettings // import WebViewClient webViewClient = new WebViewClient(); webView.setWebViewClient(webViewClient); // Enabling mp4 webSettings.setPluginsEnabled(true); // Allows plugins to run which are // normally disabled in webView webView.getSettings().setBuiltInZoomControls(true); // Allows the // Android built in // zoom control webView.getSettings().setSaveFormData(true); webView.getSettings().setLoadsImagesAutomatically(true); webView.getSettings().setPluginsEnabled(true); webView.getSettings().setLoadsImagesAutomatically(true); webView.getSettings().setSupportMultipleWindows(true); webView.getSettings().setPluginsEnabled(true); webView.getSettings().setLightTouchEnabled(true); webView.getSettings().setAllowFileAccess(true); // To allow file // downloads/streams // such as mp4, mpeg, // and 3gp files webView.getSettings().setJavaScriptEnabled(true); // Enables HTML // Javascript to run // in webview webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true); webView.getSettings().setSupportZoom(true); // Support the zoom feature webView.getSettings().setSavePassword(true); // Allow users to save passwords in forms webView.setWebViewClient(new WebViewClient() { // Opens web links clicked by user in the webview @Override public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { // Handle the error } @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } }); webView.loadUrl("file:///android_asset/test.html"); // test.html file from assets folder //... Rest of activity code... test.html <!DOCTYPE html> <html> <body> <video width="320" height="240" controls="controls"> <source src="http://www.w3schools.com/html/movie.mp4" type="video/mp4" /> Your browser does not support the video tag. </video> </body> </html> Problem Area : Android webview or Android Default Browser shows the video content in another video view when we click play button, My requirement is that video should be opened in same html page inline, so user can navigate to other page of webpage during video is playing or buffering. Research Area : I tried many other ways like, video tag of HTML5 embed tag of HTML object tag of HTML Other way of video player integration i checked so far but not worked in my requirement, Flare Video jplayer Please suggest me any way that can be suitable for my requirement, And my requirement is very simple as, I want to play video in html file as inline in webview widget of android. Thanks in Advance.

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• Results Delphi users who wish to use HID USB in windows

  - by Lex Dean

  Results Delphi users who wish to use HID USB in windows HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB Contain a list if keys containing vender ID and Producer ID numbers that co inside with the USB web sites data base. These numbers and the GUID held within the key gives important information to execute the HID.dll that is otherwise imposable to execute. The Control Panel/System/Hardware/Device manager/USB Serial Bus Controllers/Mass Storage Devices/details simply lists the registry data. The access to the programmer has been documented through the API32.dll with a number of procedures that accesses the registry. But that is not the problem yet it looks like the problem!!!!!!!!! The key is info about the registry and how to use it. These keys are viewed in RegEdit.exe it’s self. Some parts of the registry like the USB have been given a windows security system type of protection with a Aurthz.dll to give the USB read and right protection. Even the api32.dll. Now only Microsoft give out these details and we all know Microsoft hate Delphi. Now C users have enjoyed this access for over 10 years now. Now some will make out that you should never give out such information because some idiot may make a stupid virus (true), but the argument is also do Delphi users need to be denied USB access for another ten years!!!!!!!!!!!!. What I do not have is the skill in is assembly code. I’m seeking for some one that can trace how regedit.exe gets its access through Aurthz.dll to access the USB data. So I’m asking all who reads this:- to partition any friend they have that has this skill to get the Aurthz.dll info needed. I find communicating with USB.org they reply when they have a positive email reply but do not bother should their email be a slightly negative policy. For all simple reasoning, all that USB had to do was to have a secure key as they have done, and to update the same data into a unsecured key every time the data is changed for USB developer to access. And not bother developers access to Aurthz.dll. Authz.dll with these functions for USB:- AuthzFreeResourceManager AuthzFreeContext AuthzAccessCheck(Flags: DWORD; AuthzClientContext: AUTHZ_CLIENT_CONTEXT_HANDLE; pRequest: PAUTHZ_ACCESS_REQUEST; AuditInfo: AUTHZ_AUDIT_INFO_HANDLE; pSecurityDescriptor: PSECURITY_DESCRIPTOR; OptionalSecurityDescriptorArray: PSECURITY_DESCRIPTOR; OptionalSecurityDescriptorCount: DWORD; //OPTIONAL, Var pReply: AUTHZ_ACCESS_REPLY; pAuthzHandle: PAUTHZ_ACCESS_CHECK_RESULTS_HANDLE): BOOl; AuthzInitializeContextFromSid(Flags: DWORD; UserSid: PSID; AuthzResourceManager: AUTHZ_RESOURCE_MANAGER_HANDLE; pExpirationTime: int64; Identifier: LUID; DynamicGroupArgs: PVOID; pAuthzClientContext: PAUTHZ_CLIENT_CONTEXT_HANDLE): BOOL; AuthzInitializeResourceManager(flags: DWORD; pfnAccessCheck: PFN_AUTHZ_DYNAMIC_ACCESS_CHECK; pfnComputeDynamicGroups: PFN_AUTHZ_COMPUTE_DYNAMIC_GROUPS; pfnFreeDynamicGroups: PFN_AUTHZ_FREE_DYNAMIC_GROUPS; ResourceManagerName: PWideChar; pAuthzResourceManager: PAUTHZ_RESOURCE_MANAGER_HANDLE): BOOL; further in Authz.h on kolers.com J Lex Dean.

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• jQuery DatePicker - 'fake' click on page load

  - by Danny

  Hey! I've got a quick question about the jQuery UI DatePicker. When I load the page, defaultDate: 0 will work fine with selecting the current day's date. I would like to create a 'fake' click on the date so it will execute my JavaScript function and retrieve information from the database. I tried calling the function when the page loads but that doesn't work. $(document).ready(function(){ $("#datepicker").datepicker({ gotoCurrent: false, onSelect: function(date, inst) { ajaxFunction(date); }, dateFormat: 'dd-mm-yy', defaultDate: 0, changeMonth: true, changeYear: true }); }); //Browser Support Code function ajaxFunction(date){ var ajaxRequest; // The variable that makes Ajax possible! try{ // Opera 8.0+, Firefox, Safari ajaxRequest = new XMLHttpRequest(); } catch (e){ // Internet Explorer Browsers try{ ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try{ ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e){ // Something went wrong alert("Your browser broke!"); return false; } } } // Create a function that will receive data sent from the server ajaxRequest.onreadystatechange = function(){ if(ajaxRequest.readyState == 4){ var ajaxDisplay = document.getElementById('ajaxDiv'); ajaxDisplay.innerHTML = ajaxRequest.responseText; } } var queryString = "?date=" + date; ajaxRequest.open("GET", "getDiary.php" + queryString, true); ajaxRequest.send(null); } function ajaxAdd(){ var ajaxRequest; // The variable that makes Ajax possible! try{ // Opera 8.0+, Firefox, Safari ajaxRequest = new XMLHttpRequest(); } catch (e){ // Internet Explorer Browsers try{ ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try{ ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e){ // Something went wrong alert("Your browser broke!"); return false; } } } var day1 = $("#datepicker").datepicker('getDate').getDate(); var day2 = (day1 < 10) ? '0' + day1 : day1; var month1 = $("#datepicker").datepicker('getDate').getMonth() + 1; var month2 = (month1 < 10) ? '0' + month1 : month1; var year1 = $("#datepicker").datepicker('getDate').getFullYear(); var year2 = (year1 < 1000) ? year1 + 1900 : year1; var fullDate = day2 + "-" + month2 + "-" + year2; var queryString = "?breakfast=" + diary1.breakfast.value; queryString = queryString + "&lunch=" + diary1.lunch.value; queryString = queryString + "&dinner=" + diary1.dinner.value; queryString = queryString + "&date=" + fullDate; ajaxRequest.open("GET", "addDiary.php" + queryString, true); ajaxRequest.send(null); alert("Added value to database!"); diary1.breakfast.value = ""; diary1.lunch.value = ""; diary1.dinner.value = ""; ajaxFunction(fullDate); } I have pasted my DatePicker class, and the two functions that are used (one to retrieve information from the database, and one to store). Basically I want to mirror the onSelect: function on the DatePicker, but when the page first loads. Thanks!

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• error LNK2019 for ZLib sample compare.

  - by Nano HE

  Hello. I created win32 console application in vs2010 (without select the option of precompiled header). And I inserted the code below. but *.obj link failed. Could you provide me more information about the error. I searched MSDN, but still can't understand it. #include <stdio.h> #include "zlib.h" // Demonstration of zlib utility functions unsigned long file_size(char *filename) { FILE *pFile = fopen(filename, "rb"); fseek (pFile, 0, SEEK_END); unsigned long size = ftell(pFile); fclose (pFile); return size; } int decompress_one_file(char *infilename, char *outfilename) { gzFile infile = gzopen(infilename, "rb"); FILE *outfile = fopen(outfilename, "wb"); if (!infile || !outfile) return -1; char buffer[128]; int num_read = 0; while ((num_read = gzread(infile, buffer, sizeof(buffer))) > 0) { fwrite(buffer, 1, num_read, outfile); } gzclose(infile); fclose(outfile); } int compress_one_file(char *infilename, char *outfilename) { FILE *infile = fopen(infilename, "rb"); gzFile outfile = gzopen(outfilename, "wb"); if (!infile || !outfile) return -1; char inbuffer[128]; int num_read = 0; unsigned long total_read = 0, total_wrote = 0; while ((num_read = fread(inbuffer, 1, sizeof(inbuffer), infile)) > 0) { total_read += num_read; gzwrite(outfile, inbuffer, num_read); } fclose(infile); gzclose(outfile); printf("Read %ld bytes, Wrote %ld bytes, Compression factor %4.2f%%\n", total_read, file_size(outfilename), (1.0-file_size(outfilename)*1.0/total_read)*100.0); } int main(int argc, char **argv) { compress_one_file(argv[1],argv[2]); decompress_one_file(argv[2],argv[3]);} Output: 1>------ Build started: Project: zlibApp, Configuration: Debug Win32 ------ 1> zlibApp.cpp 1>d:\learning\cpp\cppvs2010\zlibapp\zlibapp\zlibapp.cpp(15): warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1> c:\program files\microsoft visual studio 10.0\vc\include\stdio.h(234) : see declaration of 'fopen' 1>d:\learning\cpp\cppvs2010\zlibapp\zlibapp\zlibapp.cpp(25): warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1> c:\program files\microsoft visual studio 10.0\vc\include\stdio.h(234) : see declaration of 'fopen' 1>d:\learning\cpp\cppvs2010\zlibapp\zlibapp\zlibapp.cpp(40): warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1> c:\program files\microsoft visual studio 10.0\vc\include\stdio.h(234) : see declaration of 'fopen' 1>d:\learning\cpp\cppvs2010\zlibapp\zlibapp\zlibapp.cpp(36): warning C4715: 'decompress_one_file' : not all control paths return a value 1>d:\learning\cpp\cppvs2010\zlibapp\zlibapp\zlibapp.cpp(57): warning C4715: 'compress_one_file' : not all control paths return a value 1>zlibApp.obj : error LNK2019: unresolved external symbol _gzclose referenced in function "int __cdecl decompress_one_file(char *,char *)" (?decompress_one_file@@YAHPAD0@Z) 1>zlibApp.obj : error LNK2019: unresolved external symbol _gzread referenced in function "int __cdecl decompress_one_file(char *,char *)" (?decompress_one_file@@YAHPAD0@Z) 1>zlibApp.obj : error LNK2019: unresolved external symbol _gzopen referenced in function "int __cdecl decompress_one_file(char *,char *)" (?decompress_one_file@@YAHPAD0@Z) 1>zlibApp.obj : error LNK2019: unresolved external symbol _gzwrite referenced in function "int __cdecl compress_one_file(char *,char *)" (?compress_one_file@@YAHPAD0@Z) 1>D:\learning\cpp\cppVS2010\zlibApp\Debug\zlibApp.exe : fatal error LNK1120: 4 unresolved externals ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

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• How do I use UIImagePickerController just to display the camera and not take a picture?

  - by Thomas

  Hello All: I'd like to know how to open the camera inside of a pre-defined frame (not the entire screen). When the view loads, I have a box, and inside it, I want to display what the camera sees. I don't want to snap a picture, just basically use the camera as a viewfinder. I have searched this site and have not yet found what I'm looking for. Please help. Thanks! Thomas Update 1: Here is what I have tried so far. 1.) I added UIImageView to my xib. 2.) Connect the following outlet to the UIImageView in IB IBOutlet UIImageView *cameraWindow; 3.) I put the following code in viewWillAppear -(void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentModalViewController:picker animated:YES]; NSLog(@"viewWillAppear ran"); } But this method does not run, as evident by the absence of NSLog statement from my console. Please help! Thanks, Thomas Update 2: OK I got it to run by putting the code in viewDidLoad but my camera still doesn't show up...any suggestions? Anyone....? I've been reading the UIImagePickerController class reference, but am kinda unsure how to make sense of it. I'm still learning iPhone, so it's a bit of a struggle. Please help! - (void)viewDidLoad { [super viewDidLoad]; // Create a bool variable "camera" and call isSourceTypeAvailable to see if camera exists on device BOOL camera = [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]; // If there is a camera, then display the world throught the viewfinder if(camera) { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; // Since I'm not actually taking a picture, is a delegate function necessary? picker.delegate = self; picker.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentModalViewController:picker animated:YES]; NSLog(@"Camera is available"); } // Otherwise, do nothing. else NSLog(@"No camera available"); } Thanks! Thomas Update 3: A-HA! Found this on the Apple Class Reference. Discussion The delegate receives notifications when the user picks an image or movie, or exits the picker interface. The delegate also decides when to dismiss the picker interface, so you must provide a delegate to use a picker. If this property is nil, the picker is dismissed immediately if you try to show it. Gonna play around with the delegate now. Then I'm going to read on wtf a delegate is. Backwards? Whatever :-p Update 4: The two delegate functions for the class are – imagePickerController:didFinishPickingMediaWithInfo: – imagePickerControllerDidCancel: and since I don't actually want to pick an image or give the user the option to cancel, I am just defining the methods. They should never run though....I think.

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• php script gets two ajax requests, only returns one?

  - by Dan.StackOverflow

  I'll start from the beginning. I'm building a wordpress plugin that does double duty, in that it can be inserted in to a post via a shortcode, or added as a sidebar widget. All it does is output some js to make jquery.post requests to a local php file. The local php file makes a request to a webservice for some data. (I had to do it this way instead of directly querying the web service with jquery.ajax because the url contains a license key that would be public if put in the js). Anyway, When I am viewing a page in the wordpress blog that has both the sidebar widget and the plugin output via shortcode only one of the requests work. I mean it works in that it gets a response back from the php script. Once the page is loaded they both work normally when manually told to. Webpage view - send 2 post requests to my php script - both elements should be filed in, but only one is. My php script is just: <?php if(isset($_POST["zip"])) { // build a curl object, execute the request, // and basically just echo what the curl request returns. } ?> Pretty basic. here is some js some people wanted to see: function widget_getActivities( zip ){ jQuery("#widget_active_list").text(""); jQuery.post("http://localhost/wordpress/wp-content/ActiveAjax.php", { zip: zip}, function(text) { jQuery(text).find("asset").each(function(j, aval){ var html = ""; html += "<a href='" + jQuery(aval).find("trackback").text() + "' target='new'> " + jQuery(aval).find("assetName").text() + "</a><b> at </b>"; jQuery("location", aval).each(function(i, val){ html += jQuery("locationName", val).text() + " <b> on </b>"; }); jQuery("date", aval).each(function(){ html += jQuery("startDate", aval).text(); <!--jQuery("#widget_active_list").append("<div id='ActivityEntry'>" + html + " </div>");--> jQuery("#widget_active_list") .append(jQuery("<div>") .addClass("widget_ActivityEntry") .html(html) .bind("mouseenter", function(){ jQuery(this).animate({ fontSize: "20px", lineHeight: "1.2em" }, 50); }) .bind("mouseleave", function(){ jQuery(this).animate({ fontSize: "10px", lineHeight: "1.2em" }, 50); }) ); }); }); }); } Now imagine there is another function identical to this one except everything that is prepended with 'widget_' isn't prepended. These two functions get called separately via: jQuery(document).ready(function(){ w_zip = jQuery("#widget_zip").val(); widget_getActivities( w_zip ); jQuery("#widget_updateZipLink").click(function() { //start function when any update link is clicked widget_c_zip = jQuery("#widget_zip").val(); if (undefined == widget_c_zip || widget_c_zip == "" || widget_c_zip.length != 5) jQuery("#widget_zipError").text("Bad zip code"); else widget_getActivities( widget_c_zip ); }); }) I can see in my apache logs that both requests are being made. I'm guessing it is some sort of race condition but that doesn't make ANY sense. I'm new to all this, any ideas? EDIT: I've come up with a sub-optimal solution. I have my widget detect if the plugin is also being used on the page, and if so it waits for 3 seconds before performing the request. But I have a feeling this same thing is going to happen if multiple clients perform a page request at the same time that triggers one of the requests to my php script, because I believe the problem is in the php script, which is scary.

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• Converting listview to a composite control

  - by Paul

  The link below shows a listview composite control in its most basic form however I can't seem to extend this to what I'm trying to do. http://stackoverflow.com/questions/92689/how-to-define-listview-templates-in-code My listview has 1 tablerow with 2 fields. The first field contains 1 element whilst the second field contains 2 elements as shown below. <asp:ListView ID="lstArticle" runat="server"> <LayoutTemplate> <table id="itemPlaceholder" runat="server"> </table> </LayoutTemplate> <ItemTemplate> <div class="ctrlArticleList_rptStandardItem"> <table width="100%"> <tr> <td valign="top" class="ctrlArticleList_firstColumnWidth"> <a href="<%# GetURL(Container.DataItem) %>"> <%# GetImage(Container.DataItem)%> </a> </td> <td valign="top"> <span class="ctrlArticleList_title"> <a href="<%# GetURL(Container.DataItem) %>"> <%# DataBinder.Eval(Container.DataItem, "Title") %> </a> </span> <span class="ctrlArticleList_date"> <%# convertToShortDate(DataBinder.Eval(Container.DataItem, "ActiveDate"))%> </span> <div class="ctrlArticleList_standFirst"> <%# DataBinder.Eval(Container.DataItem, "StandFirst")%> </div> </td> </tr> </table> </div> </ItemTemplate> So to convert this I have to use the InstantiateIn method of the ITemplate for the layouttemplate and the ItemTemplate. Data is bound to the itemtemplate using the DataBinding event. My question at the moment is how do I setup the ItemTemplate class and bind the values from the above ListView ItemTemplate. This is what I've managed so far: private class LayoutTemplate : ITemplate { public void InstantiateIn(Control container) { var table = new HtmlGenericControl("table") { ID = "itemPlaceholder" }; container.Controls.Add(table); } } private class ItemTemplate : ITemplate { public void InstantiateIn(Control container) { var tableRow = new HtmlGenericControl("tr"); //first field in row var tableFieldImage = new HtmlGenericControl("td"); var imageLink = new HtmlGenericControl("a"); imageLink.ID = "imageLink"; tableRow.Controls.Add(imageLink); // second field in row var tableFieldTitle = new HtmlGenericControl("td"); var title = new HtmlGenericControl("a"); tableFieldTitle.Controls.Add(title); tableRow.Controls.Add(tableFieldTitle); //Bind the data with the controls tableRow.DataBinding += BindData; //add the controls to the container container.Controls.Add(tableRow); } public void BindData(object sender, EventArgs e) { var container = (HtmlGenericControl)sender; var dataItem = ((ListViewDataItem)container.NamingContainer).DataItem; container.Controls.Add(new Literal() { Text = dataItem.ToString() }); } One of the functions in the ListView just for an example is: public string GetURL(object objArticle) { ArticleItem articleItem = (ArticleItem)objArticle; Article article = new Article(Guid.Empty, articleItem.ContentVersionID); return GetArticleURL(article); } Summary What do I need to do to convert the following into a composite control: 1. <a href="<%# GetURL(Container.DataItem) %>"><%# GetImage(Container.DataItem)%></a> 2. <a href="<%# GetURL(Container.DataItem) %>"> <%# DataBinder.Eval(Container.DataItem, "Title") %> </a>

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• getline(cin, variable) not wanting to work properly in c++?

  - by Jeff

  Here's my program so far: int main() { char choice = 'D'; string inputString; cout << "Please input a string." << endl; getline(cin, inputString); LetterCount letterCount(inputString); while(choice != 'E') { cout << "Please choose from the following: " << endl << "A) Count the number of vowels in the string." << endl << "B) Count the number of consonants in the string." << endl << "C) Count both the vowels and consonants in the string." << endl << "D) Enter another string." << endl << "E) Exit the program." << endl; cin >> choice; if(choice == 'A' || choice == 'a') { cout << "There are " << letterCount.vowelCount() << " vowels in this string." << endl; } else if(choice == 'B' || choice == 'b') { cout << "There are " << letterCount.consonantCount() << " consonants in this string." << endl; } else if(choice == 'C' || choice == 'c') { cout << "There are " << letterCount.vowelCount() << " vowels and " << letterCount.consonantCount() << " consonants in this string, for a total of " << (letterCount.vowelCount() + letterCount.consonantCount()) << " letters." << endl; } else if(choice == 'D' || choice == 'd') { cout << "Please type in another string." << endl; getline(cin, inputString); letterCount.setInputString(inputString); } else { choice = 'E'; } } } I'm only including the main as it's the issue giver here, everything else functions properly. The problem comes up when I use choice 'D' (input a new string.) as soon as enter is hit, the program returns right to the choice prompt and sets the inputString variable to blank (not the word blank, but nothing in it) the first getline(cin, inputString) works perfectly fine, the second one is the issue giver...any suggestions?

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• Hibernate : Foreign key constraint violation problem

  - by Vinze

  I have a com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException in my code (using Hibernate and Spring) and I can't figure why. My entities are Corpus and Semspace and there's a many-to-one relation from Semspace to Corpus as defined in my hibernate mapping configuration : <class name="xxx.entities.Semspace" table="Semspace" lazy="false" batch-size="30"> <id name="id" column="idSemspace" type="java.lang.Integer" unsaved-value="null"> <generator class="identity"/> </id> <property name="name" column="name" type="java.lang.String" not-null="true" unique="true" /> <many-to-one name="corpus" class="xxx.entities.Corpus" column="idCorpus" insert="false" update="false" /> [...] </class> <class name="xxx.entities.Corpus" table="Corpus" lazy="false" batch-size="30"> <id name="id" column="idCorpus" type="java.lang.Integer" unsaved-value="null"> <generator class="identity"/> </id> <property name="name" column="name" type="java.lang.String" not-null="true" unique="true" /> </class> And the Java code generating the exception is : Corpus corpus = Spring.getCorpusDAO().getCorpusById(corpusId); Semspace semspace = new Semspace(); semspace.setCorpus(corpus); semspace.setName(name); Spring.getSemspaceDAO().save(semspace); I checked and the corpus variable is not null (so it is in database as retrieved with the DAO) The full exception is : com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`xxx/Semspace`, CONSTRAINT `FK4D6019AB6556109` FOREIGN KEY (`idCorpus`) REFERENCES `Corpus` (`idCorpus`)) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2941) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715) at com.mysql.jdbc.Connection.execSQL(Connection.java:3249) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1541) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1455) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1440) at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102) at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73) at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638) at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298) at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187) at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172) at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70) at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519) at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:642) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:373) at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639) at xxx.dao.impl.AbstractDAO.save(AbstractDAO.java:26) at org.apache.jsp.functions.semspaceManagement_jsp._jspService(semspaceManagement_jsp.java:218) [...] The foreign key constraint has been created (and added to database) by hibernate and I don't see where the constraint can be violated. The table are innodb and I tried to drop all tables and recreate it the problem remains... EDIT : Well I think I have a start of answer... I change the log level of hibernate to DEBUG and before it crash I have the following log insert into Semspace (name, [...]) values (?, [...]) So it looks like it does not try to insert the idCorpus and as it is not null it uses the default value "0" which does not refers to an existing entry in Corpus table...

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