HTML5 + Javascript chart libraries

For our side-project used for customer analytic we need simple way how to generate HTML pages with tables and charts. As HTML5 UI framework we’re using Foundation and for tables jQuery Tablesorter. Now the question is which chart library use for charts.

Chart libraries

Tested and usefull

Not tested, hard to use, not attractive …

GetTickCount64 problem on WindowsXP

The procedure entry point GetTickCount64 could not be located in the dynamic link library KERNEL32.dll
The procedure entry point GetTickCount64 could not be located in the dynamic link library KERNEL32.dll

Today we received report from one of our customers about problem with our ORM Designer on WindowsXP – 32bit. Our latest version returns following error:

The procedure entry point GetTickCount64 could not be located in the dynamic link library KERNEL32.dll

The problem is that GetTickCount64 doesn’t exists in XP system.

Solution:

It’s necessary to compile your application (and any library which uses GetTickCount64) with correct WINVER and _WIN32_WINNT defines value. List of WINVER values for all Windows version can be found here.

You can define these values in your resource.h file:

#define WINVER 0x0501
#define _WIN32_WINNT 0x0501

or add it to a project property -> C/C++ -> Preprocessor -> Preprocessor Definitions:

2013-08-29_15-45-10

Qt Solution:

If you want to define these values automatically in Qt project, add following lines to your .pro file:

#Windows XP compatability
DEFINES += "WINVER=0x0501"
DEFINES += "_WIN32_WINNT=0x0501"

External links:

Why I am not using phpMyAdmin on production servers

Even though I find phpMyAdmin and similar tools useful I don’t like them on production servers. When I spent a lot of my time protecting website against SQL injection I don’t want to leave opened doors to access the database through phpMyAdmin. Many phpMyAdmin installations are not protected with HTTPS and just one login on a public or attacked wifi can lead to a lot of troubles. So I recommend to delete the phpMyAdmin installation from the server and start with a more comfortable and secured way to do the task.

SSH tunnel will give you the security you’re looking for. Start your Putty, load the session and configure tunnel:

Putty tunnel screenshot

I’ve selected port 3366 to be used on my local machine so it avoids conflict with my other installation. Now I can connect from any tool to MySQL database at localhost:3366. I prefer Netbeans IDE and MySQL Workbench which is also really great for server/user configuration.

Secure SSH with RSA/DSA key

We are using SSH a lot to deploy our projects and to do common maintenance tasks. If you are accessing your server many times a day you might find frustrating typing the password all the time. You can use private key instead. Here are some detailed articles about adding RSA key and configuring SSH daemon. Bellow is a summary of the basic steps for Windows users.

Putty which is a great alternative to the Linux tools. To generate private/public key you should use PuttyGen.exe. Run the application, click generate and follow the instructions. It’s a good idea to put your name into the key comment so you could easily recognize your public key in configuration files. You should also protect your key with a password.

PuttyGen screenshot

Copy the public key which is located in the big text field above Key fingerprint field. Append the public key into /root/.ssh/authorized_keys file (if you want to login as root). You might need to create this file if it doesn’t exist already. Click on Save private key button and save the key to a secured place. You can now use this private key to login with putty to the remote server. To make things more comfortable you can use an agent to store unlocked private keys in the memory while you are logged into your computer. Run this command after you login:

pageant.exe john_doe.ppk

Without any further settings you should now be able to login to the remote SSH without password. If everything worked as expected you can now disable password authenticated access to make your server more secure:

# /etc/ssh/sshd_config
PasswordAuthentication no

To load you key after you login to a Linux box (useful for deployment) insert:


# ~/.bash_profile
# include .bashrc if it exists
if [ -f ~/.bashrc ]; then
 . ~/.bashrc
fi

keychain --clear id_rsa
. ~/.keychain/$HOSTNAME-sh

ssh-add

Now we have a little bit more secured but more comfortable way to use SSH.

Error in RegEx (atlrx.h) in Visual Studio C++ 2003 and 2005

During our development we found that Microsoft RegEx (Regular expression) implementation contains a bug which caused crashes of our applications. The application module using RegEx passed all unit test, but sometimes under heavy usage the application crashed at our customer. Because we use BugTrap for error and crash notifications, we knew the error was in atlrx.h file.

After several hours of testing and searching we found the bug. The crash didn’t occur after first code execution, but we had to run thousand iterations of the same code over and over. The bug is located in file atlrx.h at line 708.

Original file looks like this:

  case RE_ADVANCE:
    sz = CharTraits::Next(szCurrInput);
    szCurrInput = sz;
    if ( sz == NULL || *sz == '\0')
      goto Error;
    ip = 0;
    pContext->m_nTos = 0;
    break;

Problem is, that variable szCurrInput have in some circumstances NULL value and this causes the crashes.

Updated file with bug fix:

  case RE_ADVANCE:
    if( szCurrInput == NULL || *szCurrInput == '\0' )
      goto Error;
    sz = CharTraits::Next(szCurrInput);
    szCurrInput = sz;
    if ( sz == NULL || *sz == '\0')
      goto Error;
    ip = 0;
    pContext->m_nTos = 0;
    break;

We change the first two lines. It is necessary to test szCurrInput variable for NULL and empty string value. If szCurrInput is NULL or empty string, it’s necessary to stop processing RegEx. Otherwise stack overflow during processing string occurs.

Note

Some time later we had other problems with Microsoft RegEx implementation and non-standard RegEx syntax. So we left MS RegEx parser and moved to Boost.Regex which is really nice piece of code (as well as other libraries of the Boost pack) and supports Perl and POSIX regular expressions. Whole Boost library is carefully unit test and can be relied on.

XSLT snippet to convert string from CamelCase to hyphens (Hyphenize)

Here is a snippet to convert string in XSLT template from CamelCase to hyphenized text. (Developed today while creating new import/export templates for Doctrine2 YAML support).

Usage:

<xsl:call-template name="ConvertCamelToXmlStyle">
	<xsl:with-param name="text">OrmDesigner</xsl:with-param>
</xsl:call-template>

Result:

orm-designer

XSLT Template:

	<!-- =========================================================================== -->
	<!-- === Convert CameCaseText to camel-case-text                             === -->
	<!-- === (c) Inventic s.r.o. ORM Designer team (http://www.orm-designer.com) === -->
	<!-- =========================================================================== -->
	<xsl:template name="ConvertCamelToXmlStyle">
		<xsl:param name="text"/>
		<xsl:variable name="Upper">ABCDEFGHIJKLMNOPQRSTUVQXYZ ,</xsl:variable>
		<xsl:variable name="Lower">abcdefghijklmnopqrstuvwxyz</xsl:variable>

		<xsl:for-each select="str:split($text,'')">
			<xsl:choose>
				<xsl:when test="contains($Upper,node())">
					<xsl:if test="position()>1">
						<xsl:text>-</xsl:text>
					</xsl:if>
					<xsl:value-of select="translate(node(),$Upper,$Lower)"/>
				</xsl:when>
				<xsl:otherwise>
					<xsl:value-of select="node()"/>
				</xsl:otherwise>
			</xsl:choose>
		</xsl:for-each>
	</xsl:template>

Feel free to use in whatever way you find it useful.

XSLT snippet to convert string from hyphens to CamelCase

Here is a snippet to convert string in XSLT template from hyphenized text to CamelCase. (Developed today while creating new import/export templates for Doctrine2 YAML support).

Usage:

First:
		<xsl:call-template name="ConvertXmlStyleToCamelCase">
			<xsl:with-param name="text">orm-designer</xsl:with-param>
		</xsl:call-template>

Second:
		<xsl:call-template name="ConvertXmlStyleToCamelCase">
			<xsl:with-param name="text">orm-designer</xsl:with-param>
			<xsl:with-param name="firstLower" select="false()"/>
		</xsl:call-template>

Result:

First: ormDesigner
Second: OrmDesinger

XSLT Template:

	<!-- =========================================================================== -->
	<!-- === Convert camel-case-text to CameCaseText                             === -->
	<!-- === (c) Inventic s.r.o. ORM Designer team (http://www.orm-designer.com) === -->
	<!-- =========================================================================== -->
	<xsl:template name="ConvertXmlStyleToCamelCase">
		<xsl:param name="text"/>
		<xsl:param name="firstLower" select="true()"/>

		<xsl:variable name="Upper">ABCDEFGHIJKLMNOPQRSTUVQXYZ</xsl:variable>
		<xsl:variable name="Lower">abcdefghijklmnopqrstuvwxyz</xsl:variable>

		<xsl:for-each select="str:split($text,'-')">
			<xsl:choose>
				<xsl:when test="position()=1 and $firstLower = true()">
					<xsl:value-of select="substring(node(),1,1)"/>
				</xsl:when>
				<xsl:otherwise>
					<xsl:value-of select="translate(substring(node(),1,1),$Lower,$Upper)"/>
				</xsl:otherwise>
			</xsl:choose>
			<xsl:value-of select="substring(node(),2,string-length(node()))"/>
		</xsl:for-each>
	</xsl:template>

Feel free to use in whatever way you find it useful.

Problem with msdia80.dll

One of tool we’re using requires msdia80.dll file. Unfortunately this DLL is available only inside the VS2005 installation / redistributable pack. When you execute dump_syms.exe without this file, you will receive following message:

CoCreateInstance CLSID_DiaSource failed (msdia80.dll unregistered?)

One solution is to install Visual C++ 2005 Redistributable Package. Another way is download only msdia80.dll file and register it manually by using:

regsrv32 msdia80.dll

How to sign your Qt Mac OS X App for Gatekeeper

Starting from Mac os 10.8 apple applications requires certificate. Without that certificate (or without additional system tweaks described here on our product support page: http://support.orm-designer.com/5/macos-mountain-lion-10-8-unidentified-developer ) user will se following message:

"OrmDesigner2" can't be opened because it is from an unidentified developer.
MacOS unidentified developer in ORM Designer

Solution

To solve this error message it’s necessary to do following steps:

  1. Register in Apple developer program and pay $99 per year
  2. Download and install developer certificate
  3. Sign whole application
  4. Test it!

1) Register on Developer.apple.com

You need to create registration here: https://developer.apple.com/. It’s necessary to fill info about contact person and company. After that, your registration will be reviewed by apple team and if everything will be OK, your registration will be approved.

2) Use Apple site to generate certificates

Open https://developer.apple.com/account/overview.action ,choose Certificates,  Click Add. Than select certificate parameters suitable for your need. In my case it was Mac Development and  Developer ID.

Now you need to install this certificate to your developer machine. Simply double-click on certificate and let system to import it. You can check that certificate is imported in Go->Utilities->Keychain Access->login. Now search for “Developer ID Application: XXXX”

MacOS certificate

Note: In my case when I transfer certificate to several developer machines I need to migrate also other Apple certificates. Without that my certificate wasn’t a valid.

3) Sign your application

Now you need to sign your application including all plugins and frameworks inside app bundle. After you sing your app, you can’t do any changes in the bundle. So as first run your deploy as usual and as last step do app singing.

For ORM Designer sign script looks like this:

#go to deploy directory
cd $StarkDeploy.directory$/deploy

#sign app
codesign --force --verify --verbose --sign "Developer ID Application: Inventic s.r.o." ./OrmDesigner2.app

#sign all *.dylib files
find OrmDesigner2.app -name *.dylib | xargs -I $ codesign --force --verify --verbose --sign "Developer ID Application: Inventic s.r.o." $

#sign all Qt* frameworks
find OrmDesigner2.app -name Qt* -type f | xargs -I $ codesign --force --verify --verbose --sign "Developer ID Application: Inventic s.r.o." $

4) Test it!

As last step it’s necessary to test that sign process was successful. As first you can try following command line to validate  it:

codesign -vvv -d OrmDesigner2.app

#RESULT:
Executable=/OrmDesigner2/DeployFiles/macos64/deploy/OrmDesigner2.app/Contents/MacOS/OrmDesigner2
Identifier=com.orm-designer.OrmDesigner2
Format=bundle with Mach-O thin (x86_64)
CodeDirectory v=20100 size=174478 flags=0x0(none) hashes=8717+3 location=embedded
Hash type=sha1 size=20
CDHash=5a491e16f7dcca15b44af4XXXX1a2d2dcc786518
Signature size=4237
Authority=Developer ID Application: Inventic s.r.o. (6BYV46LH6T)
Authority=Developer ID Certification Authority
Authority=Apple Root CA
Signed Time=6 Jun 2013 23:16:08
Info.plist entries=10
Sealed Resources rules=4 files=27
Internal requirements count=1 size=212

Now when you checked that App is correctly signed, it’s time to try it on clean computer where no security policy changes was made. Upload your app and execute it.

If you don’t see annoying screen “Can’t execute application from unidentified developer”, you win ;-).

External links

How to transfer certificate: 

How to import:

Apple links

Qt stylesheet guidance

Style sheets

Layout Management

How to tips

How to recompute Qt style-sheet based on Q_PROPERTY:

void QControl::RedrawWidgetStylesheet()
{
	style()->unpolish(this);
	style()->polish(this);
	update();
}

Services for Heatmaps and Mouse move heatmaps

This is list of heatmap services I found and some of them also test:

Name Features Free plan Paid plan/1 Paid plan/2
ClickTale
(top secret pricing)
  • Heatmaps
  • record mouse
  • Scroll stats
  • funnels
  • Attention heatmaps
  • Keystrokes
  • 400 pageviews/month
  • heatmap only on most popular pages
  • only 2 pages to playback
  • $99/month base plan
  • still limited number of heatmaps
  • $200-300/month
  • full plan
MouseStats
(pricing)
  • Heatmaps
  • Record mouse
  • Scroll stats
  • Area stats
  • Attention heatmaps
  • 100+100 pageviews/month
  • 2 heatmap projects
  • 1 playback project
  • $10($16)/month
  • 10.000 pageviews/month
  • 15 heatmap projects
  • 1 website.
  • $20($30)/month
  • 25.000 pageviews/month
  • 30 projects
  • 1 website
Inspectlet
(pricing)
  • Heatmaps
  • Record mouse
  • Scroll stats
  • Funnels
  • 2500 pageviews/month
  • 500 sessions
  • no https
  • no funnels
  • $10/month
  • 10.000 pageviews
  • 5.000 sessions
  • Https support
  • no funnels
  • $20/month
  • 100.000 pageviews/month
  • 50.000 sessions
  • Https support
  • Funnels
luckyorange
(pricing)
  • Heatmaps
  • Record mouse
  • Scroll stats
  • on-site chat
  • realtime statistics
  • visitor pools
no free, trial only
  • $10/month
  • 50.000 pageviews
  • 10.000 move heatmaps, 5.000 click heatmaps
  • 3 sites
  • $20/month
  • 100.000 pageviews
  • 20.000 move heatmaps, 10.000 click heatmaps
  • 6 sites
mouseflow
(pricing)
  • Heatmaps
  • Record mouse
  • Scroll stats
  • In-page analytics
  • Keystrokes
  • 100 sessions/month
  • no https
  • €10/month
  • 1.000 sessions/month
  • Https support
  • €50/month
  • 10.000 sessions/month
  • Https support
  • 3 websites
SeeMyVisits
(pricing)
  • Heatmaps
  • Record mouse
  • Scroll stats
  • In-page analytics
  • Keystrokes
no free plan
  • $20/month
  • 2.000 pages/month
  • $35/month
  • 4.000 pages/month
sessioncam
(pricing)
  • Heatmaps
  • Record mouse
  • Funnels
  • 500 pages/month
  • $30/month
  • 10.000 pages/month

http://alternativeto.net/software/clicktale/

CRM system for our startup

We reached the point where we need some kind of CRM system. We have a lot of customers, oportunies and tasks we need to track and keep records. I tried several of them and read about much more. Here are summary of CRMs with short info about each.

Long term tested

Tested for few minutes

Found & Reviewed

Other

Other CRM lists

Screenshots

Insightly

Insightly

ZOHO CRM

ZOHO CRM

Streak crm

Streak CRM

HIGHRISE CRM

Highrise CRM

BASE CRM

BASE CRM

CapsuleCRM

CapsuleCRM

Ubuntu eth0: ERROR while getting interface flags: No such device

This article is step-by-step tutorial how to fix a problem which occured after I restored my virtual machines from backup to my ESXI server.

ifconfig
ifconfig when eth0 is not available

when I used lspci, result was

lspci
lspci result

So network adapter is correctly available in my virtual machine. As next step I need to found out which alias is used for this adapter. I didn’t find any easily way than try et0,eth1,….

ifconfig eth0
eth0: error fetching interface information: Device not found

ifconfig eth1
eth1: error fetching interface information: Device not found

ifconfig eth2
eth2: Link encap: Ethernet HWaddr.....

So, I found my network adapter. Now as last step it’s necessary to update network interfaces to this adapter

sudo nano /etc/network/interfaces

#and change all eth0 to eth1 values
/etc/network/interfaces

As last step restart your machine and everything should work correctly.

External links:

  • http://www.cyberciti.biz/faq/show-ethernet-adapter-ubuntu-linux/