Free xmlencoder example software for linux

DTLS Client/Server Example contains a simple DTLS client and DTLS server to show how to send UDP data over an encrypted channel using OpenSSL DTLSv1 support.

LIST OF FILES:

Directory: common - Contains callback functions and error reporting functions common to client and server

sslmgr.h
sslmgr.c

Directory: dtls_server

dtls_server.c - DTLS server part

Directory: dtls_client

dtls_client.c - DTLS client part

GNUstep examples is a collection of programs that are meant to show programmers how to use GNUstep.
GNUstep examples includes a calculator, a currency converter, finger, fractal, puzzle, hostaddress, and ink (a simple editor).
Enhancements:
- Minor feature enhancements

SYNOPSIS

Plenty of people have learned WWW::Mechanize, and now, you can too!
Following are user-supplied samples of WWW::Mechanize in action.

You can also look at the t/*.t files in the distribution.

Please note that these examples are not intended to do any specific task. For all I know, theyre no longer functional because the sites they hit have changed. Theyre here to give examples of how people have used WWW::Mechanize.

Note that the examples are in reverse order of my having received them, so the freshest examples are always at the top.

Starbucks Density Calculator, by Nat Torkington

Heres a pair of scripts from Nat Torkington, editor for OReilly Media and co-author of the Perl Cookbook.

Rael [Dornfest] discovered that you can easily find out how many Starbucks there are in an area by searching for "Starbucks". So I wrote a silly scraper for some old census data and came up with some Starbucks density figures. Theres no meaning to these numbers thanks to errors from using old census data coupled with false positives in Yahoo search (e.g., "Dodie Starbuck-Your Style Desgn" in Portland OR). But it was fun to waste a night on.

Here are the top twenty cities in descending order of population, with the amount of territory each Starbucks has. E.g., A New York NY Starbucks covers 1.7 square miles of ground.

New York, NY 1.7
Los Angeles, CA 1.2
Chicago, IL 1.0
Houston, TX 4.6
Philadelphia, PA 6.8
San Diego, CA 2.7
Detroit, MI 19.9
Dallas, TX 2.7
Phoenix, AZ 4.1
San Antonio, TX 12.3
San Jose, CA 1.1
Baltimore, MD 3.9
Indianapolis, IN 12.1
San Francisco, CA 0.5
Jacksonville, FL 39.9
Columbus, OH 7.3
Milwaukee, WI 5.1
Memphis, TN 15.1
Washington, DC 1.4
Boston, MA 0.5

Time::Convert is a Perl interface to converting unix seconds to years, days, hours and minutes.

SYNOPSIS

use Time::Convert;
my $convert = new Time::Convert;

EXAMPLE

use Time::Convert;
my $convert = new Time::Convert;
$REPLY = $convert->ConvertSecs(time);
print($REPLY);

GCJ::Cni::Examples is a Perl module with examples of how to use GCJs CNI interface to write Perl Modules in Java.

EXAMPLES

Writing Treaded modules in Java

One benefit of using GCJ is that it takes advantage of POSIX threading. This is nice since Perls threading model is, shall we say, less than ideal. Now, you could theoretically write a module in C or C++ and and use the standard POSIX library to do your threaded work for you, however, why not take advantage of the nice Threading interface that Java provides to you by default. This may also come in handy if you have a massively threaded Java library that youd like to call from Perl.

For this example assume that I want to do matrix multiplication, albeit in a very crazy manner. Therefore, I will write a Java class, Matrix, and a method, multiply, which will take another matrix to perform the operation between. Heres the crazy part, for each cell in the resulting matrix I will spawn a new thread, as an internal class, and give it a row and a column from which they will derive the result. I know this is a little wierd but the point is that Ill be spawning a lot of new threads. To multiply two 10x10 matrices we will have to spawn 100 threads (one thread per cell in the resulting 10x10 matrix). Imagine doing this in Perl, then imagine doing it in Java; natively compiled Java. Much faster and a lot less headaches.

The Java Interface/pseudocode is as follows:

public class Matrix {
public Matrix ( int numRows, int numCols ) {
...Constructor stuff...
}

public void set ( int row, int col, int val ) {
...set an element...
}

public int get ( int row, int col ) {
...get an element...
}

public Matrix multiply ( Matrix times ) {
...set it up...
for ( int i = 0; i < rows; i++ ) {
for ( int j = 0; j < times.getCols(); j++ ) {
//GO NUTS!!!!
ArrayMultiplier multiplier = new ArrayMultiplier(this, times, result, i, j);
multiplier.start();
...etc...
}
}
...wait for the threads to exit and return the new matrix...
}

public int getRows ( ) {
...get number of rows...
}

public int getCols ( ) {
...get number of columns...
}

public void print ( ) {
...print the matrix to stdout...
}

private class ArrayMultiplier extends Thread {
public ArrayMultiplier ( Matrix a, Matrix b, Matrix result, int row, int col ) {
...Construct this bad boy...
}

public void run ( ) {
int sum = 0;
for ( int i = 0; i < a.getCols(); i++ ) {
sum += (a.get(row, i) * b.get(i, col));
}
result.set(row, col, sum);
}

}
}
Now, we want to call this class from Perl. My perferred manner is through SWIG so thats what were going to use. However, you do not need to use SWIG, you can use whatever method you prefer when wrapping C++ classes. We begin by creating a C++ header file from our above class. This is done by using GCJs gcjh utility. First we need to class compile Matrix.java

gcj -C Matrix.java

Then we go ahead and create the header file:

gcjh Matrix

Easy enough. We can then extract the interface we want to have available in Perl from the generated header file and from it create a i file to be used as input to SWIG. I usually start by copying my header file to the same named file but with an i extension instead. I then remove all of the grimy C++ gruff, private methods and variables, slap a module directive on it and call it done. It wont always be this easy though. When youre done an interface file for the above class should look something like this:

%module Matrix;

typedef int jint;

class Matrix
{
public:
Matrix (jint, jint);
virtual void set (jint, jint, jint);
virtual jint get (jint, jint);
virtual ::Matrix *multiply (::Matrix *);
virtual jint getRows ();
virtual jint getCols ();
virtual void print ();
};
We then put SWIG to work and generate our C++ wrapper for Perl:

swig -perl -c++ Matrix.i

After the above command we now will see two new files in our current directory, Matrix.pm and Matrix_wrap.cxx; these correspond the module directive we gave in Matrix.i.

At this point all we have left to do is compile, and use.

gcj -c Matrix.java
gcc -c -I -include Matrix.h Matrix_wrap.cxx
gcc -shared -lgcj -lstdc++ Matrix.o Matrix_wrap.o -oMatrix.so

A simple Perl file using this module might look something like:

sub populate_matrix {
my $matrix = shift;
for ( my $i = 0; $i < $matrix->getRows(); $i++ ) {
for ( my $j = 0; $j < $matrix->getCols(); $j++ ) {
$matrix->set($i, $j, $i * $j);
}
}
}

use GCJ::Cni;
use Matrix;

GCJ::Cni::JvCreateJavaVM(undef);
GCJ::Cni::JvAttachCurrentThread(undef, undef);

my $matrix = new Matrix::Matrix(10, 10);
populate_matrix($matrix);
my $matrix2 = new Matrix::Matrix(10, 10);
populate_matrix($matrix2);
$matrix3 = $matrix->multiply($matrix2);
$matrix3->print();

GCJ::Cni::JvDetachCurrentThread();

Ill leave it up to the reader to write a Perl module that does the same thing, that is, spawns 100 threads. In my own personal fiddling I found that just spawning that many threads (never mind doing any kind of work) was over 3 time slower in Perl. In this situation we at least get to use our favorite language, Perl, and offload some of the heavy hitting to a language more suited for it.

Where this really comes in handy is when you have an existing multi-threaded Java library that you would like to expose to Perl. You could theoretically natively compile various components of your library and then generate Perl bindings to access it. In this way, you get a little extra speed and efficiency as well as code reuse and binding.

GNUsTicker is a GNOME panel applet RSS aggregator like KNewsTicker for KDE.

It may be extended for feeding from differente sources (an example for POP3 mail server is provided).

Example NAT usage is a little script to show a NAT usage example.

Sample:

#----------------------#
# Variable Definitions #
#----------------------#

EXT=eth0
INT=eth1

# "Masquerading" Example
PRIV_NETS="128.111.1.1 128.111.185.0/255.255.255.0"
MASQ_NET=192.168.1.0/255.255.255.0

# "General SNAT" Example
MAP_FROM=192.168.1.0/255.255.255.0
MAP_TO=128.111.185.30-128.111.185.42

# "Redirection" Example
INTERNAL_IP=10.10.1.1

# "Port Forwarding" Example
EXTERNAL_IP=128.111.1.200
NEWS_SERVER=10.10.1.38
MAIL_SERVER=10.10.1.69

# "Load Balancing" Example
VIRTUAL_SERVER=news.sblug.com
SERVER_RANGE=10.10.1.9-10.10.1.15

#-------------#
# NAT Section #
#-------------#

#
# Flush previous rules
#

iptables -t nat -F


#
# Masquerading
#

# Masquerading for outgoing connections, except privileged nets are exempt
for NET in $PRIV_NETS ; do
iptables -t nat -A POSTROUTING -d $NET -o $EXT -j ACCEPT
done
iptables -t nat -A POSTROUTING -s $MASQ_NET -o $EXT -j MASQUERADE


#
# General SNAT
#

# Internal computers w/ private ips "borrow" public ips of other internal computers to ssh out
iptables -t nat -A POSTROUTING -s $MAP_FROM -o $EXT -p tcp --dport ssh -j SNAT --to-source $MAP_TO
iptables -t nat -A POSTROUTING -s $MAP_FROM -o $EXT -p udp --dport ssh -j SNAT --to-source $MAP_TO


#
# Redirection
#

# Redirect internal net http traffic through squid proxy, but allow direct access to local web server
iptables -t nat -A PREROUTING -i $INT -d ! $INTERNAL_IP -p tcp --dport www -j REDIRECT --to-port 8080


#
# Port Forwarding
#

# Forward gateway port 7000 to news server and gateway port 8000 to pop mail server
iptables -t nat -A PREROUTING -d $EXTERNAL_IP -p tcp --dport 7000 -j DNAT --to-dest $NEWS_SERVER:nntp
iptables -t nat -A PREROUTING -d $EXTERNAL_IP -p tcp --dport 8000 -j DNAT --to-dest $MAIL_SERVER:pop3

#
# Load Balancing
#

# Basic load balancing by redirecting nntp requests to any of several local news servers
iptables -t nat -A PREROUTING -d $VIRTUAL_SERVER -p tcp --dport nntp -j DNAT --to-dest $SERVER_RANGE

QAA is a XUL Mozilla Firefox extension that performs a user supplied test list on a Web application. Test sessions can be defined by example.
A report is generated when sessions are replayed.
Enhancements:
- This release can load and save .qaa files (Quality Assurance Agent file format), record a journey in the tested site using definition by example, and perform a test bench with a log style report.