How to create a self-signed SSL Certificate

Jetty ssl setup

For Apache:

1.Generate a Private Key

openssl genrsa -des3 -out server.key 1024

2.Generate a CSR (Certificate Signing Request)
openssl req -new -key server.key -out server.csr
note: in common name, enter www.sample.com

3. Remove passphrase

cp server.key server.key.org
openssl rsa -in server.key.org -out server.key

4. self signed
openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt

server.key and server.crt can be installed now in apache

For tomcat, generate a jks key for use:

openssl pkcs12 -inkey server.key -in server.crt -export -out server.pkcs12

java -classpath /Users/u/jetty-6.1.26/lib/jetty-util-6.1.26.jar:/Users/u/jetty-6.1.26/lib/jetty-6.1.26.jar org.mortbay.jetty.security.PKCS12Import server.pkcs12 server.jks

server.jks can be used in tomcat’s server.xml

how to hookup nginx with startssl
StartSSL and Nginx

1) installed a PCI sata card, it has IDE and SATA ports.
2) reboot, ubuntu 8.10 automatically detects the card without installing any driver
3) put a 320G sata drive in, and manually mount the drive, it works.

to make it automatically mount:

ls -l /dev/disk/by-uuid

you will see a list of UUIDs with hard drive partitions. then edit the /etc/fstab, add this line:

UUID=28c2a248-5d9c-4119-8bd2-204a3cecbc53 /mnt/sa ext2 defaults 0 0

reboot, that’s it. of course the above line is specific to my case, you need to update it with your own.

this link helps a lot:

http://www.psychocats.net/ubuntu/mountlinux

A generator for credit card numbers

Very handy when you need some numbers to test.

To update your application setting

To create a new app

Ok, Macbook Pro’s battery is known to have a poor performance, I got a replacement, and it just last for a few months, but honestly, I did not really follow the calibration suggestions as it seems difficult to do , for the few months I’m using the battery, I did that full calibration a few times, looking back, there should be an easier way to calibrate, here is a tip about this:

The official way:

1. Fully charge the battery first.
2. Keep it in full state for at lest two hours.
3. Disconnect the power and use the computer until it goes to sleep.
4. Rest the computer for at least five hours.
5. Fully charge the battery again.

you can use your unit in all the steps above except #4.

An easy to follow approach:

1. Use your unit with power connected in the day.
2. Unplug the power x hours before you go to sleep, x represents the max number of hour your battery can last, in my case, it’s only 20 min.
3. Use the computer until goes into sleep mode, you go to sleep too.
4. Use your unit with power connected next morning until it is fully charged.

It is very easy to install Wine in Zenwalk 6.4:

1. su root
netpkg wine
this will install the Wine 1.1.44 version into system

2. wine notepad.exe
if you can see the notepad, it works.

3. login as a user
wine notepad.exe
quit
cd .wine
you will see a drive_c/windows, look for Fonts, it is an empty directory

download this file and run it, it will install two fonts files into ‘Fonts’
Tahoma32
wine tahoma32.exe
Make sure the font files really got installed into windows/Fonts

3. wine regedit
look for HKEY_CURRENT_USER/Control Panel/Desktop, set fontSmoothing to 1

4. wine notepad.exe
does it look nicer this time?

this should work with IB prior to 6.5. Firebird does not need this.

Binding is quite similar to Delphi’s data aware components. let’s start a project in XCode 3.x and add following code:

Person.h

@interface Person : NSObject {
	NSString *name;
	float age;
	BOOL isMarried;
}

Person.m

@implementation Person
@end

Modify UntitledAppDelegate.h :

@interface UntitledAppDelegate : NSObject <NSApplicationDelegate> {
    NSWindow *window;
	Person *me;
}

Modify UntitledAppDelegate.m :

- (id) init;
{
	me = [Person alloc];
	[me setValue:@"John" forKey:@"name"];
	[me setValue:[NSNumber numberWithFloat:1.5] forKey:@"age"];
	[me setValue:[NSNumber numberWithBool:NO] forKey:@"isMarried"];
	
	NSLog(@" my name is %@", [me valueForKey:@"name"]);
	return self;
}

compile and run, you should see following in the console:

[Switching to process 1180]
Running…
2010-05-26 09:05:51.523 Untitled[1180:a0f]  my name is John

So far so good. we can see the object ‘me’ is instantiated and values are correctly set. now let’s bind this object ‘me’ to a NSObjectController in IB, it is a three step process:

Drag and drop a NSObjectController into MainMenu.xlib

Define attributes
Specify the class name (Person) under ‘Class Name’, Add keys under Key section, this way you are telling the binding about attributes of class ‘Person’, see the picture:

Bind the controller’s content to a instance of the class
You need to bind the NSObjectController to its content, click the binding page and do as follow,the blue line/arrow is just to show you the linkage, you need to do what in the yellow box to bind the object ‘me’ under controller:

by this time you have finish Model -> Controller, we will address the View layer later.

Now, compile and run, check console, if no error, we proceed to next step:

Attach the views to the controller
Drag and drop two NSLable, one NSCheckBox into main Window under IB, open the first label’s binding page:

do the same for the other two, save, compile and run, you should see:

Summary:

1. Storage should be allocated in code
2. Specify the attribute of object in NSObjectController.
3. Bind the content to the storage allocated in #1

for the view layer, bind the NSObjectController to the various visual controls.

KVC is the basis for the binding mechanism to work in Cocoa.

here is a sample class:

@interface Person : NSObject {
	NSString *name;
	float age;
	BOOL isMarried;
}

You can create an object of Person and set the attributes as follow:

	Person *me = [Person alloc];
	[me setValue:@"John" forKey:@"name"];
	[me setValue:[NSNumber numberWithFloat:1.5] forKey:@"age"];
	[me setValue:[NSNumber numberWithBool:NO] forKey:@"isMarried"];

To access the values:

	NSLog(@" my name is %@", [me valueForKey:@"name"]);

This is very similar to Java’s beans, however bean requires you to write a getter/setter while KVC does not. of course you can also provide getter/setter in KVC, if it is provided, Cocoa will use that instead of its internal method(getValue/setValue):

	provide getter/setter sample code.

In Objective C 2.0, we have another way to specify getter/setter, it is very similar to Java/Tapestry 5′s annotation:

@property
private String name;

Java does not have header, you specify @property in only one place while in Objective C, you need to do this in two places, one in .h and another in .m:

header sample
m sample

The point here is, neither getter/setter nor @property annotation is required to have KVC working in your code. the getValue/setValue from NSObject will make sure the KVC is working.

Method name:

Here is what I use for

should start with lower case, capitalize the first character of a word, name every parameter including the first one.
Example:

given this path “/users/home/avchd/00001.mts” and string ‘avchd/’, find the starting position of 0001.mts, that’s just right after the ‘avchd/’

version 1:
+ (NSUInteger) getStartingPos : (NSString *) aPath after : (NSString *) aSubPath;

this works, but the first parameter ‘aPath’ was not named, adding the subfix ‘InPath’ makes it clear:

version 2:
+ (NSUInteger) getStartingPosInPath : (NSString *) aPath after : (NSString *) aSubPath;