Programmingsite : source code

Is Internet Connection Available in C sharp

admin — Sat, 04 May 2013 19:49:35 +0000

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.NetworkInformation;

namespace Common {
public static class MailHelper {

public static bool InternetConnectionAvailable( ) {
bool result = false;
Ping ping = new Ping( );
PingReply reply = null;
try {
reply = ping.Send( “www.google.com” );
result = reply.Status == IPStatus.Success;
} catch ( Exception ) {

}

return result;
}

}
}

Validate Recaptcha in C sharp

admin — Sat, 04 May 2013 19:46:41 +0000

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net;
using System.IO;
using System.Web.Mvc;

namespace WeBlog.Core {
public static class RecaptchaUtils {
public static JsonResult ValidateRecaptcha( string privateKey, string remoteip, string challenge, string response) {
string postData = String.Format(“privatekey={0}&remoteip={1}&challenge={2}&response={3}”,
privateKey, remoteip,
challenge, response);
JsonResult result = new JsonResult();
byte[] postDataBuffer = System.Text.Encoding.ASCII.GetBytes(postData);

Uri serviceUri = new Uri(“http://api-verify.recaptcha.net/verify”, UriKind.Absolute);
try {
HttpWebRequest webRequest = (HttpWebRequest)System.Net.WebRequest.Create(serviceUri);
webRequest.ContentType = “application/x-www-form-urlencoded”;
webRequest.ContentLength = postDataBuffer.Length;
webRequest.Method = “POST”;

//incase you are using a proxy server
IWebProxy proxy = WebRequest.GetSystemWebProxy();
proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
webRequest.Proxy = proxy;

Stream requestStream = webRequest.GetRequestStream();
requestStream.Write(postDataBuffer, 0, postDataBuffer.Length);

HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
string jsonResponse = string.Empty;

using (StreamReader sr = new StreamReader(webResponse.GetResponseStream()))
jsonResponse = sr.ReadToEnd();

string[] tokens = jsonResponse.Split(new char[] { ‘\n’ });
if (tokens.Length == 2) {
Boolean success = tokens[0].Equals(“true”, StringComparison.CurrentCulture);
result.Data = new { Success = success, Message = tokens[1] };
}
else {
result.Data = new { Success = false, Message = “Invalid response returned” };
}
}
catch (Exception ex) {
result.Data = new { Success = false, Message = ex.Message };
}

return result;
}
}
}

A basic web client in C sharp

admin — Fri, 03 May 2013 22:36:28 +0000

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;

public class MainClass {
public static void Main() {
System.Net.WebClient Client = new WebClient();
Stream strm = Client.OpenRead(“http://www.google.com”);
StreamReader sr = new StreamReader(strm);
string line;
while ((line = sr.ReadLine()) != null) {
Console.WriteLine(line);
}
strm.Close();
}
}

Append a string to a file in PERL

admin — Fri, 03 May 2013 22:27:45 +0000

open OUT, “>>”, “filename” or die “Couldn’t open file: $!\n”;
print OUT “aString”;
close OUT;

Append a string to a file in Java

admin — Fri, 03 May 2013 22:26:45 +0000

try {
BufferedWriter out = new BufferedWriter(new FileWriter(“filename”, true));
out.write(“aString”);
out.close();
} catch (IOException e) {
}

Random password generator in PERL

admin — Thu, 02 May 2013 21:53:55 +0000

Usage: perl script.pl length

#!/usr/bin/perl
# Script: Random password generator
# Fri 03 Dec 2010 01:30:24 PM CET
#use strict;

# List of chars. Modify this if you need to add more, like simbols, etc…
my @chars = qw( a b c d e f g h i j k l m n o p q r s t
u v w x y z A B C D E F G H I J K L M N
O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7
8 9 );

# The array of the password.
my @password = (“”);

# Select a random char from the array @chars and introduced into the array @password.
sub pass_gen {
my $rand = int(rand(@chars));
my $add_char = $chars[$rand];
push(@password, $add_char);
}

# The length of the password. If none is supplied externally, given the value of 8.
my $length = shift || 8;

# Call the function pass_gen X (the value stored in $lenght) times.
for (my $x = 1; $x <= $length; $x++) {
&pass_gen();
}

# Print the password without spaces.
print “Here is your password:\n”;
print @password = grep { “$_” } @password, “\n”;

#End of file

list all files in directory with PERL

admin — Thu, 02 May 2013 21:52:28 +0000

opendir(IMD, $dirtoget) || die(“Cannot open directory”);
@thefiles= readdir(IMD);
closedir(IMD);

print “Content-type: text/html\n\n”;
print “”;

foreach $f (@thefiles)
{
unless ( ($f eq “.”) || ($f eq “..”) )
{
print “$f
”;
}
}

Validate email in PERL

admin — Thu, 02 May 2013 21:49:49 +0000

use Regexp::Common qw[Email::Address];
use Email::Address;

while (<>) {
my @found = /($RE{Email}{Address})/g;
my @addrs = map $_->address, Email::Address->parse(“@found”);

print “X-Addresses: “, join(“, “, @addrs), “\n”;
}

Unzipping zip file in Java

admin — Thu, 02 May 2013 21:21:21 +0000

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Main {

public static void main(String[] args) throws IOException {
ZipFile zf = new ZipFile(args[0]);
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
System.out.println(“Unzipping ” + ze.getName());
FileOutputStream fout = new FileOutputStream(ze.getName());
InputStream in = zf.getInputStream(ze);
for (int c = in.read(); c != -1; c = in.read()) {
fout.write(c);
}
in.close();
fout.close();
}
}
}

Check a file exists in Python

admin — Thu, 02 May 2013 21:01:31 +0000

import os

def file_exists(file_name):
if os.path.exists(file):
return ‘%s is found’ % file_name
else:
return ‘%s is missing’ % file_name