Digicorp

Displaying Google map

The iPhone SDK 3.0 offers a class of map view in MapKit framework. You just need to declare an object of MKMapView and add it to your current view.

MKMapView *mapview=[[MKMapView alloc]initWithFrame:(CGRectMake(0, -20, 320, 320))];

[self.view addSubview:mapview];

Now, to display the user location on map, I was trying to insert a pin annotation on map. Soon, I realized that was wrong approach. User location is meant for changing. It will be updated many time.

The solution for this was to use the MKUserLocation class object. The object of this class will return “Blue dot” of built-in Google map application on iPhone. It will also show animated circle with radius of probable range of user location.

MKUserLocation *ulocation=[[MKUserLocation alloc]init];

[mapview setShowsUserLocation:TRUE];

[mapview addAnnotation:ulocation];

That’s it. You don’t need to worry any more about the current location of user. The ulocation object will change its co-ordinates and display the dot whenever the position is updated.

Sending encoded image

You can send images to web service either by mail or by encoding it to string. I have used base64 encoding method to encrypt the image taken from iPhone camera and to send it to web service.

Generally, the image taken from iPhone camera is of very large size (800 kb to 2 mb). So, it may take very long time to encode the image.

I found another way to do the same thing. After taking the picture, you can display the image taken in full view of screen (320*480). Then take the screenshot at that stage and fetch the new image for encoding. In this way, you can make your encoding faster as this was the same picture taken using camera.

I have used following process to take the screenshot.

UIWindow *screenWindow = [[UIApplication sharedApplication] keyWindow];

UIGraphicsBeginImageContext(screenWindow.frame.size);

[screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

NSData *screenshotPNG = UIImagePNGRepresentation(screenshot);

Now, since you have the image in screenshotPNG, you can encode it using your base64 method.

NSString *dstring=[[NSString alloc]init];

dstring=[self base64StringFromData:screenshotPNG length:[screenshotPNG length]];

Playing a specific song

With iPhone SDK 3.0, we have the access to iPod library on iPhone. The apple documentation “iPodLibraryAccess Guide” covers most of the part needed for understanding this functionality. Here, I will describe how to play a specific song stored on iPhone.

Let’s assume our song name is in songtitle which is NSString. To begin, we need objects of

MPMusicPlayerController and a MPMediaQuery.

MPMusicPlayerController* iPodMusicPlayer;

MPMediaQuery *everything = [[MPMediaQuery alloc] init];

everything=[MPMediaQuery songQuery];

NSArray *itemsFromGenericQuery = [everything items];

for (MPMediaItem *song in itemsFromGenericQuery)

{

NSString *mysong = [song valueForProperty: MPMediaItemPropertyTitle];

if([mysong isEqualToString:songtitle])

{

iPodMusicPlayer=[MPMusicPlayerController iPodMusicPlayer];

[iPodMusicPlayer setNowPlayingItem:song];

[iPodMusicPlayer play];

break;

}

}

Using Facebook Connect on iPhone

Facebook Connect used in iPhone lets user connect to their facebook account. I am facing one problem in maintaining session of facebook. The sample application provided with facebook sdk allows user to stay logged-in even if iPhone application is terminated. So, the user will not have to enter facebook account username and password next time.

We can know the status of user if he is logged in by using -

(void)dialogDidSucceed:(NSURL*)url  and – (void)sessionDidLogout:(FBSession*)session method from FBLoginDialog.m.

Whenever user logsin using facebook account, the session will stored using NSUserDefaults. We can know this by tracking -(void)save; method in FBSession.m file.

The save method in FBSession.m  stores 4 objects in userdefaults: FBUserId, FBSessionKey, FBSessionSecret and FBSessionExpires.

I am facing problem here. Whenever I try to resume previous session, using -(BOOL)resume; method in FBSession.m, I get correct userid, but rest of the values will be nil. i.e.session key, sesison secret and session expirary date are nil. So, I get one fatal error at that time saying: “attempt to insert nil value (key: session_key)”  I am still trying to find out the solution for that.

Table of Contents

• Introduction
• What is FCKEditor?
• When Should We Use FCKEditor?
• The features that attracts the user to use it
• What are improvement needs in it?
• Integrate FCKEditor    Step by Step
• How to apply Themes
• How to apply Language
• Conclusion
• Bibliography
• References
• History

Introduction

There are many editors available in the market. Each editor has its own features, benefits and drawbacks. FCKEditor is top one of them in Open Source category. In this article, I will explain some of good features.

What is FCKEditor?

FCKEditor   is HTML text editor brings to the web much of the power of desktop editors like MS Word. FCKEditor is powerful tool which provides the html editing, theme to suit your web interface, multiple language supports, selection of tools to be displayed as per requirement, image upload, flash file upload and many more. It’s lightweight and doesn’t require any kind of installation on the client computer.

The features that attracts the user to use it

1. Open source
2. User friendly and easy to integrate
3. Toolbar selection facility
4. Support of multiple language
5. Support of skin to suite web page UI
6. Light weight
7. Image and flash file upload

The improvement which could be done

1. Inbuilt facility to select theme at client side
2. Inbuilt facility to select language at client side
3. More font type and font size to improve user interface

Integrate FCKEditor Step by Step

1. Download FCKEditor  source code from following link: http://sourceforge.net/projects/FCKEditor /files/FCKEditor /2.6.4.1/FCKEditor _2.6.4.1.zip/download
2. Create new/ Open existing web project/ website 
3. Copy FCKEditor source code folder and paste it to website root directory. 
4. Copy FCKEditor  FredCK.FCKEditor V2.dll file from source code and paste it to website Bin folder 
5. You have to register FCKEditor to use it in your page. There are two way to register it. Manual: Following script will register it.  You have add this script in every page you want to use FCKEditor. From Toolbar: : You can Otherwise, you can browse FCKEditor by right click on Toolbar >> Choose Items. A dialog box will appear as shown in following image. Select .Net Framework Components >> Click on Browse button located at right hand bottom. Choose the .dll of FCKEditor from the bin directory of your application. An item called FCKEditor will be added to your Toolbar. Now you are ready to drag and drop editor in your page. If you place editor in your page, it will also add same code in your web page as we have done in manual method. 
6. Run website, you can see the FCKEditor in your browser with default theme and default English language. 

How to apply Theme?

FCKEditor   having a great themeing feature. User can apply the theme in two ways. One way is dynamically and another statically. The site of FCKEditor provides 3 themes to be downloading. There are many third party open source themes available to download. I have shared few themes with this article.

[1]. Default Theme

[2]. Office2003 Theme

[3]. Silver Theme

Now, how can assign default theme and apply dynamic theme?

Answer is here:

First of all you can set default theme from fckconfig.js, look at below image:

You can also set the language from .aspx /html /php page where you have declare FCKEditor  .

Just set the SkinPath Property.

Now run the application you can view the office2003 theme in FCKEditor as you have set in above page.

How to apply Language?

FCKEditor   provides a great multiple language support feature. User can able to change the language dynamically or set default language as per website language.

FCKEditor provides 56 languages that is you can use as per your requirement.

Now, how can assign default language or apply dynamic language?

Answer is here:

First of all you can set default language from fckconfig.js, look at below image:

You can also set the language from .aspx /.html /.php page where you have declare FCKEditor.

Just set the DefaultLanguage Property.

Now run the application you can view the Arabic language in FCKEditor as you have set in above page.

Conclusion

FCKEditor   is very simple, easy to integrate and can be used in almost all the web application as html editor/ rich textbox editor.

Bibliography

FCKEditor

References

FCKEditor

History

4^th September, 2009: initial post

Following steps may help you deploying your application successfully on the device.

• Download your .mobileprovision and .cer certificates from developer.apple.com website.
• Add the certificates to your keychain in Mac.
• Add your mobile provision certificate in Xcode project. Drag the certificate to Xcode in left pane of window and drop there.
• Select the Project and go to Edit Project Settings

• Select Build Tab
• Select Configuration as Release
• Go to code signing
• Add your certificate in Any iPhone OS Device section
• When you add certificate in for Code Signing Identity, then it must be in list of Any iPhone OS Device option.

• Follow same steps for Debug configuration also.
• Do same change for Debug and Release configuration in Edit Active Target “Project Name” setting also

• Edit the ProjectName-info.plist file in resources group and change the company name with yourcompany name on which you have registered your certificate in following value com.digicorp.${PRODUCT_NAME:rfc1034identifier} and save the project.

• To solve invalid entitlement issue first right click on application and add new file
• Under the iPhone OS select Code Signing
• Select the Entitlements
• Make sure it is saved as Entitlements.plist

• Now uncheck the box of get-task-allow property in Entitlements.plist

• Set the Any iPhone OS Device with saved entitlements certificate under Code Signing Entitlements for Debug and Release configuration.

• Set the device OS for which you want to deploy your application from top left bar of Xcode window.
• Save the Project and Build it.

It will successfully deploy your application on device.

What is Amazon Web Services (AWS)?
Amazon Web Services (AWS) has provided companies of all sizes with an infrastructure web services platform in the cloud. With AWS you can requisition compute power, storage, and other services–gaining access to a suite of elastic IT infrastructure services as your business demands them.

Amazon Web Services provides a number of benefits for IT organizations which are:cost effective,dependable,flexible.

How  to integrate amazon in your site?
-> You need to get an access_key_id.
-> Authorized your Product API or Access_key.

How to get an access_key_id?
To get an access_key you have to create aws account from the below link:
https://aws-portal.amazon.com/gp/aws/developer/registration/index.html

After submitting the form you will get a mail from amazon. In that mail you will find a link link:
https://aws-portal.amazon.com/gp/aws/developer/account/index.html?ie=UTF8&action=access-key

From this link you will get your access key and private key. Store your public key(access key) and private key(secret key) in your config file. Using this access_key you can access all amazon  books and its details  in your page.

How to make your Product API or Access_key Authorized?
You need to create a two demo files and one function file using below code

1) Function file-  aws_signature.php
2) Example file- example1.php
3) Example file- example2.php

1)Make one file named as aws_signature.php
<?php
function aws_signature($location, $params, $public_key, $private_key)
{
$private_key=”your secret key”;
$method = “GET”;
$hostname = “ecs.amazonaws.”.$location;
$uri = “/onca/xml”;

// additional parameters
$params["Service"] = “AWSECommerceService”;
$params["AWSAccessKeyId"] = $public_key;

// GMT timestamp
$params["Timestamp"] = gmdate(“Y-m-d\TH:i:s\Z”);

// API version
$params["Version"] = “2009-03-31″;

// sort the parameters
ksort($params);

// create the query
$query = array();
foreach ($params as $param=>$value)
{
$param = str_replace(“%7E”, “~”, rawurlencode($param));
$value = str_replace(“%7E”, “~”, rawurlencode($value));
$query[] = $param.”=”.$value;
}
$query = implode(“&”, $query);
$string_to_sign = $method.”\n”.$hostname.”\n”.$url.”\n”.$query;
$signature = base64_encode(hash_hmac(“sha256″, $string_to_sign, $private_key, True));

// create request
$request = “http://”.$hostname.$url.”?”.$query.”&Signature=”.$signature;
// do request
$request=str_replace(” “,”+”,$request);
$response = @file_get_contents($request);
if ($response === False)
{
return False;
}
else
{
// parse XML
$parsed_xml = simplexml_load_string($response);
if ($parsed_xml === False)
{
return False; // no xml
}
else
{
return $parsed_xml;
}
}
//Note:You can use  $parsed_xml as you requested array.You will get all the records from this array.
?>

2)Make one file named as example1.php
//To get the data for particular ISBN.
<?php
include(‘aws_signature.php’);
$isbn=”your book isbn value”;
include(‘aws_signature.php’);
$public_key = “your public key”;
$private_key = “your private key”;

//You can select response group from this site:http://docs.amazonwebservices.com/_
AWSECommerceService/2008-03-03    /DG/index.html?ItemLookup.html

//Operation is ItemLookup for Particular item page.
$parsed_xml = aws_signature(“com”,  array(“Operation”=>”ItemLookup”,”ResponseGroup”=>”VariationSummary,_
SalesRank,Medium,Reviews,ItemAttributes,Offers,Images”,”ItemId”=>$isbn),   $public_key, $private_key);
?>

3)Make one file named as example2.php
//To get all books from amazon without knowing any book isbn value.
<?php
include(‘aws_signature.php’);
$public_key = “YOur public key”;
$private_key = “your private key”;
$new_keyword=”Your keyword”;

//Operation is ItemSearch for all books.
$parsed_xml = aws_signature(“com”,   array(“Operation”=>”ItemSearch”,”SearchIndex”=>”Books”,”ResponseGroup”=>”VariationSummary,_
SalesRank,Medium,Reviews,ItemAttributes,Offers,Images”,”Keywords”=>$new_keyword),  $public_key, $private_key);
?>

This article shows how to configure raid 1 mirroring into your linux server

you must have two hard drive installed on your linux server with the same capacity

You can listed them using the following command

fdisk –l

This will display your currently installed hard drive on your linux server

/dev/hda/

/dev/hdb/

Then you have to create a logical partition on both hard drives with same capacity

Following command willl create a new partition on your linux server , for first hard drive (/dev/hda)

fdisk /dev/hda

This will ask for primary or extended partition

Type e for extended partition

Next will ask for cylinder size of your partition , don’t change anything

Next will ask for actual space for your extended partition

Type +10000M

Type w for write partition table

Now you have to create a logical partition using the following command

fdisk /dev/hda

N for new partition

L for logical partition

Just enter with the default configuration (cylinder size)

Type the size of your logical partition +5000m

Type w for write partition table

Remember by default when you create a new partition linux uses partition id number 82 .

You have to change this partition id fd for raid configuration with the following command

fdisk /dev/hda

Type l for change partition id

This will ask you which partition id would you like to change type your partition number

For example 5

Type fd for raid partition id

Type w for write partition table

You have to complete the same procces on second hard drive

Now you can start your raid 1 configuration using the following command

But before do this please check mdadm rpm package is installed or not

You can check this using rpm –q mdadm

You can also install this package using the following command

Type rpm –ivh mdadm

Now run the following command to create raid array

Type mdadm –create /dev/md0 –level=1 /dev/hda5 /dev/hdb5

This will create a raid partition on your linux server

You can see the details using the following command

Type mdadm –detail /dev/md0

Now you have to format this partition to use them

Type mkfs –t ext3 /dev/md0

This will write ext3 file system on your raid partition

Then you have to mount this raid partition on some directory using

Type mount /dev/md0 /raid1

If one of the hard drive faild on raid 1 type the following command to remove them from raid1

Type mdadm /dev/md0 –f /dev/hda5 (to fail your harddrive in raid1 )

Type mdadm /dev/md0 –r /dev/hda5 ( to remove your hard drive from raid1 )

Now you can join a new hard drive create logical partition with same capacity & join into you raid1 partition using the following command

Type mdadm /dev/md0 –a /dev/hdc5

You can see raid1 will syncs the data with the new hard drive using

Type mdadm –detail /dev/md0

1. Introduction (Moving /opt data to a new partition)

The partition /opt is one of the most-often-moved partitions Because Linux Installs Third Party Software in /opt Directory. For Example Zimbra, Scalix.. So there is Disk Space Issue Occurs after Log Period

Some Times All Space On /opt Becomes Full and Your Application’s Performance Becomes Poor. In That Case you need an additional Harddrive or a Partition That Contains Big Space to Moved

In This Article I Will Show You How to Transfer Your /Opt Data to New Harddisk or Another Partition

Add New Hard Disk onto Your Server

When You Attach New Hard Drive on Server, It Will recognized as /dev/sdb.
Your First Hard Drive should be /dev/sda

2. Create new partition on your new hard drive with fdisk command:

fdisk /dev/sdb

Press n for Create a New Partition

This Will Ask For Primary or Extended Partition

Press p for Primary Partition

Press Enter for Default Setting in cylinder Size of Partition

Type the Size of the Partition That You Want To Allocate To Your New Partition

For Example: +80000M

This Will Create 80 GB New Primary Partition in to Your New Hard Drive

Press w for Save the Settings

Type partprobe Command to update The Kernel about newly added Partition

Now Format the Partition Using ext3 File System So That We Can Use Partition

mkfs –t ext3 /dev/sdb1

You Can Check Newly Created Partition Status Using fdisk –l Command . This Command Will Give You the Status of All the Partition

3. Mount the new file system in /mnt

Create a directory called /mnt/newopt, and then mount the new partition there:

# mount /dev/sdb1 /mnt/newopt

4. Drop to single-user mode

You must go To Single User Mode to Copy All Data in /opt to /mnt/newopt. You shouldn’t have any files open in /home, and entering single-user mode eliminates this possibility:

#Init 1

5. Change directories to /home and copy files

Type The Following

# cd /opt
# cp -avx * /mnt/newopt

The cp -avx command recursively copies the contents of /home to /mnt/newpopt, preserving all file attributes.
After this command finishes, /mnt/newopt will contain an exact copy of all the files and directories currently in /opt.

6a. If you installed /opt on separate partition then follow below steps

Unmount the old partition by typing:

# cd /
# Umount /opt/

Then, unmount and remount the new partition:

# umount /mnt/newopt
# mount /dev/sdb1 /opt

Now, the new partition is available at /opt and is ready to be used. We can perform the last few steps in multiuser mode. Exit single-user mode, so that the system is back up and running Type: init 5

Add This Entry To /etc/fstab File

/dev/sdb1   /opt   ext2   defaults   1   2

6b. If you installed /opt on shared partition then follow below steps

These instructions are for systems where the old /opt is on a shared partition.

# cd /
# mv /opt /opt.old
# mkdir /opt
# mount /dev/sdb1 /opt

Add This Entry to /etc/fstab File

/dev/sdb1   /opt   ext2   defaults   1   2

That way, your new partition will get mounted correctly the next time the system is rebooted.

We left the old /opt directory/partition behind, just in case there were problems copying files. After verifying that the system is running smoothly, you can remove the /opt.old directory.

The sole intent of my article is to demonstrate how one can use standards-based markup for HTML emails. Like it or not, HTML emails are here to stay. So, For those of you who are ready to improve the markup of your HTML emails, here is a quick compatability guide to HTML tags & CSS Properties for different web-based & PC based email environments.

HTML Tags	PC based email environments	Web-based email environments
	Outlook 2003/OE	Gmail	Yahoo Mail	Windows Live Mail	Hotmail
<style> element in the <head>
<style> element in the <body>
<link> element in the <head>
<link> element in the <body>
CSS Properties
background-color
background-image
background-position
background-repeat
border
border-collapse
border-spacing
bottom
color
cursor
display
float
font-family
font-size
font-style
font-weight
height
left
letter-spacing
line-height
list-style-image
list-style-position
list-style-type
margin
opacity
overflow
padding
position
right
text-align
text-decoration
text-indent
text-transform
top
vertical-align
visibility
width
word-spacing
z-index

Concluding Words..

HTML emails that contain semantic markup and CSS gel very well with the most commonly used email clients. And for clients that offer poor or no support, the semantic markup allows for graceful degradation.
And, for all those who really do not want to handle the long list mentioned above, you always have these words to mention above your email “Having trouble reading this email? Click here to View it in your browser.”