size | Scripting and security

Abrir las categorías de una página web en WordPress que se listan mediante botones en un formulario de PowerShell

(1 votes, average: 5.00 out of 5)

$buttons_functionslist=@(
    $json=(Invoke-WebRequest -Uri 'https://www.jesusninoc.com/wp-json/wp/v2/categories').content | ConvertFrom-JSON
    $json.name
)

$buttons_functionbuttoncount = $buttons_functionslist.count

$loop = 0

#Formulario
$Form = New-Object System.Windows.Forms.Form
$Form.Text="Formulario"
$Form.Size=New-Object System.Drawing.Size(500,500)
$Form.StartPosition="CenterScreen"

while($loop -lt $buttons_functionbuttoncount)
	{
	$thisbutton = New-Object System.Windows.Forms.Button
	[string]$thisbuttonname = $buttons_functionslist[$loop]
	$thisbutton.Text = $thisbuttonname
	$thisbutton.size = New-Object System.Drawing.Size(100,20)
	$thisbutton.Location = New-Object System.Drawing.Size(200,(20*$loop+1))
	$thisbutton.Add_Click({
            if($json.name.indexof($this.Text))
            {
                start chrome $json.link[$json.name.indexof($this.Text)]
            }
		})
	$Form.Controls.Add($thisbutton)
	$loop += 1
	}

$Form.ShowDialog()

$buttons_functionslist=@(

$json=(Invoke-WebRequest -Uri 'https://www.jesusninoc.com/wp-json/wp/v2/categories').content | ConvertFrom-JSON

$json.name

)

$buttons_functionbuttoncount = $buttons_functionslist.count

$loop = 0

#Formulario

$Form = New-Object System.Windows.Forms.Form

$Form.Text="Formulario"

$Form.Size=New-Object System.Drawing.Size(500,500)

$Form.StartPosition="CenterScreen"

while($loop -lt $buttons_functionbuttoncount)

{

$thisbutton = New-Object System.Windows.Forms.Button

[string]$thisbuttonname = $buttons_functionslist[$loop]

$thisbutton.Text = $thisbuttonname

$thisbutton.size = New-Object System.Drawing.Size(100,20)

$thisbutton.Location = New-Object System.Drawing.Size(200,(20*$loop+1))

$thisbutton.Add_Click({

if($json.name.indexof($this.Text))

{

start chrome $json.link[$json.name.indexof($this.Text)]

}

})

$Form.Controls.Add($thisbutton)

$loop += 1

}

$Form.ShowDialog()

Ver mediante una lista de botones en un formulario de PowerShell las categorías de una página en WordPress

(2 votes, average: 5.00 out of 5)

$buttons_functionslist=@(
    $json=(Invoke-WebRequest -Uri 'https://www.jesusninoc.com/wp-json/wp/v2/categories').content | ConvertFrom-JSON
    $json.name
)

$buttons_functionbuttoncount = $buttons_functionslist.count

$loop = 0

#Formulario
$Form = New-Object System.Windows.Forms.Form
$Form.Text="Formulario"
$Form.Size=New-Object System.Drawing.Size(500,500)
$Form.StartPosition="CenterScreen"

while($loop -lt $buttons_functionbuttoncount)
	{
	$thisbutton = New-Object System.Windows.Forms.Button
	[string]$thisbuttonname = $buttons_functionslist[$loop]
	$thisbutton.Text = $thisbuttonname
	$thisbutton.size = New-Object System.Drawing.Size(100,20)
	$thisbutton.Location = New-Object System.Drawing.Size(200,(20*$loop+1))
	$thisbutton.Add_Click({
	        Write-Host $this.Text
		})
	$Form.Controls.Add($thisbutton)
	$loop += 1
	}

$Form.ShowDialog()

$buttons_functionslist=@(

$json=(Invoke-WebRequest -Uri 'https://www.jesusninoc.com/wp-json/wp/v2/categories').content | ConvertFrom-JSON

$json.name

)

$buttons_functionbuttoncount = $buttons_functionslist.count

$loop = 0

#Formulario

$Form = New-Object System.Windows.Forms.Form

$Form.Text="Formulario"

$Form.Size=New-Object System.Drawing.Size(500,500)

$Form.StartPosition="CenterScreen"

while($loop -lt $buttons_functionbuttoncount)

{

$thisbutton = New-Object System.Windows.Forms.Button

[string]$thisbuttonname = $buttons_functionslist[$loop]

$thisbutton.Text = $thisbuttonname

$thisbutton.size = New-Object System.Drawing.Size(100,20)

$thisbutton.Location = New-Object System.Drawing.Size(200,(20*$loop+1))

$thisbutton.Add_Click({

Write-Host $this.Text

})

$Form.Controls.Add($thisbutton)

$loop += 1

}

$Form.ShowDialog()

Añadir botones a un formulario en PowerShell de forma automática

(4 votes, average: 5.00 out of 5)

$buttons_functionslist=@(
	"Botón1",
	"Botón2",
	"Botón3"
	"Botón4"
	"Botón5"
)

$buttons_functionbuttoncount = $buttons_functionslist.count

$loop = 0

#Formulario
$Form = New-Object System.Windows.Forms.Form
$Form.Text="Formulario"
$Form.Size=New-Object System.Drawing.Size(500,500)
$Form.StartPosition="CenterScreen"

while($loop -lt $buttons_functionbuttoncount)
	{
	$thisbutton = New-Object System.Windows.Forms.Button
	[string]$thisbuttonname = $buttons_functionslist[$loop]
	$thisbutton.Text = $thisbuttonname
	$thisbutton.size = New-Object System.Drawing.Size(100,20)
	$thisbutton.Location = New-Object System.Drawing.Size(200,(20*$loop+1))
	$thisbutton.Add_Click({
	        Write-Host $this.Text
		})
	$Form.Controls.Add($thisbutton)
	$loop += 1
	}

$Form.ShowDialog()

$buttons_functionslist=@(

"Botón1",

"Botón2",

"Botón3"

"Botón4"

"Botón5"

)

$buttons_functionbuttoncount = $buttons_functionslist.count

$loop = 0

#Formulario

$Form = New-Object System.Windows.Forms.Form

$Form.Text="Formulario"

$Form.Size=New-Object System.Drawing.Size(500,500)

$Form.StartPosition="CenterScreen"

while($loop -lt $buttons_functionbuttoncount)

{

$thisbutton = New-Object System.Windows.Forms.Button

[string]$thisbuttonname = $buttons_functionslist[$loop]

$thisbutton.Text = $thisbuttonname

$thisbutton.size = New-Object System.Drawing.Size(100,20)

$thisbutton.Location = New-Object System.Drawing.Size(200,(20*$loop+1))

$thisbutton.Add_Click({

Write-Host $this.Text

})

$Form.Controls.Add($thisbutton)

$loop += 1

}

$Form.ShowDialog()

pspy – unprivileged linux process snooping

(1 votes, average: 5.00 out of 5)

pspy is a command line tool designed to snoop on processes without need for root permissions. It allows you to see commands run by other users, cron jobs, etc. as they execute. Great for enumeration of Linux systems in CTFs. Also great to demonstrate your colleagues why passing secrets as arguments on the command line is a bad idea. The tool gathers it’s info from procfs scans. Inotify watchers placed on selected parts of the file system trigger these scans to catch short-lived processes. Getting started Get the tool onto the Linux machine you want to inspect. First get the […]

Pedir el nombre de un proceso y mostrar información del proceso mediante PowerShell con Node-PowerShell, EJS (Embedded JavaScript), Body-parser y Express

(4 votes, average: 5.00 out of 5)

Fichero principal index.js

// Para realizar el siguiente código se ha utilizado el enlace: https://codeburst.io/build-a-weather-website-in-30-minutes-with-node-js-express-openweather-a317f904897b

// Importante, instalar:
// EJS (Embedded JavaScript)
// npm install ejs --save

// Express
// npm install --save express
const express = require('express');

// Body-parser
// npm install body-parser --save
const bodyParser = require('body-parser');

// Node-powershell
// npm i -S node-powershell
const shell = require('node-powershell');
const app = express();

// Cargar el CSS y el fichero EJS
/*
|-- process
   |-- views
      |-- index.ejs
   |-- public
      |-- css
         |-- style.css
   |-- package.json
   |-- index.js
*/

app.use(express.static('public'));
app.set('view engine', 'ejs')

// Cargar el fichero index.ejs, que contiene el siguiente código
/*
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Test</title>
    <link rel="stylesheet" type="text/css" href="/css/style.css">
    
  </head>
  <body>
    <div class="container">
      <fieldset>
        <form action="/" method="post">
          <input name="process" type="text" class="ghost-input" placeholder="Enter a Process" required>
          <input type="submit" class="ghost-button" value="Show process">
        </form>
      </fieldset>
    </div>
  </body>
</html>
*/

// Aceptar respuestas
app.use(bodyParser.urlencoded({ extended: true }));

// Mostrar la web con petición GET
app.get('/', function (req, res) {
  res.render('index');
})

// Código que se va a añadir en la respuesta para seguir pidiendo procesos
let codigo = '<!DOCTYPE html><html>  <head>    <meta charset="utf-8">    <title>Test</title>    <link rel="stylesheet" type="text/css" href="/css/style.css">      </head>  <body>    <div class="container">      <fieldset>        <form action="/" method="post">          <input name="process" type="text" class="ghost-input" placeholder="Enter a Process" required>          <input type="submit" class="ghost-button" value="Show process">        </form>      </fieldset>    </div>  </body></html>';

// Preparar la petición a PowerShell
let ps = new shell({
  executionPolicy: 'Bypass',
  noProfile: true
});

// Mostrar la petición POST y devolver la ejecución del comando sobre el que se quiere obtener información
app.post('/', function (req, res) {
  ps.addCommand('Get-Process -name ' + req.body.process + ' | ConvertTo-Html -Property Name, Path, Company')
  ps.invoke()
  .then(output => {
    res.send(codigo+output);
})
.catch(err => {
  console.log(err);
  ps.dispose();
}); 
})

// Dejar el servidor en el puerto 3000
app.listen(3000, function () {
  console.log('Example app listening on port 3000!')
})

// Para realizar el siguiente código se ha utilizado el enlace: https://codeburst.io/build-a-weather-website-in-30-minutes-with-node-js-express-openweather-a317f904897b

// Importante, instalar:

// EJS (Embedded JavaScript)

// npm install ejs --save

// Express

// npm install --save express

const express = require('express');

// Body-parser

// npm install body-parser --save

const bodyParser = require('body-parser');

// Node-powershell

// npm i -S node-powershell

const shell = require('node-powershell');

const app = express();

// Cargar el CSS y el fichero EJS

|-- process

|-- views

|-- index.ejs

|-- public

|-- css

|-- style.css

|-- package.json

|-- index.js

app.use(express.static('public'));

app.set('view engine', 'ejs')

// Cargar el fichero index.ejs, que contiene el siguiente código

<!DOCTYPE html>

<html>

<head>

</head>

<body>

</form>

</fieldset>

</div>

</body>

</html>

// Aceptar respuestas

app.use(bodyParser.urlencoded({ extended: true }));

// Mostrar la web con petición GET

app.get('/', function (req, res) {

res.render('index');

})

// Código que se va a añadir en la respuesta para seguir pidiendo procesos

let codigo = '<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>Test</title> <link rel="stylesheet" type="text/css" href="/css/style.css"> </head> <body> <div class="container"> <fieldset> <form action="/" method="post"> <input name="process" type="text" class="ghost-input" placeholder="Enter a Process" required> <input type="submit" class="ghost-button" value="Show process"> </form> </fieldset> </div> </body></html>';

// Preparar la petición a PowerShell

let ps = new shell({

executionPolicy: 'Bypass',

noProfile: true

});

// Mostrar la petición POST y devolver la ejecución del comando sobre el que se quiere obtener información

app.post('/', function (req, res) {

ps.addCommand('Get-Process -name ' + req.body.process + ' | ConvertTo-Html -Property Name, Path, Company')

ps.invoke()

.then(output => {

res.send(codigo+output);

})

.catch(err => {

console.log(err);

ps.dispose();

});

})

// Dejar el servidor en el puerto 3000

app.listen(3000, function () {

console.log('Example app listening on port 3000!')

})

Fichero index.ejs

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Test</title>
    <link rel="stylesheet" type="text/css" href="/css/style.css">
    
  </head>
  <body>
    <div class="container">
      <fieldset>
        <form action="/" method="post">
          <input name="process" type="text" class="ghost-input" placeholder="Enter a Process" required>
          <input type="submit" class="ghost-button" value="Show process">
        </form>
      </fieldset>
    </div>
  </body>
</html>

<!DOCTYPE html>

<html>

<head>

</head>

<body>

</form>

</fieldset>

</div>

</body>

</html>

Fichero style.css

/*
  Styles from this codepen:
  https://codepen.io/official_naveen/pen/rgknI
*/

body {
  width: 800px;
  margin: 0 auto;
  font-family: 'Open Sans', sans-serif;
}
.container {
  width: 600px;
  margin: 0 auto;
}
fieldset {
  display: block;
  -webkit-margin-start: 0px;
  -webkit-margin-end: 0px;
  -webkit-padding-before: 0em;
  -webkit-padding-start: 0em;
  -webkit-padding-end: 0em;
  -webkit-padding-after: 0em;
  border: 0px;
  border-image-source: initial;
  border-image-slice: initial;
  border-image-width: initial;
  border-image-outset: initial;
  border-image-repeat: initial;
  min-width: -webkit-min-content;
  padding: 30px;
}
.ghost-input, p {
  display: block;
  font-weight:300;
  width: 100%;
  font-size: 25px;
  border:0px;
  outline: none;
  width: 100%;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  color: #4b545f;
  background: #fff;
  font-family: Open Sans,Verdana;
  padding: 10px 15px;
  margin: 30px 0px;
  -webkit-transition: all 0.1s ease-in-out;
  -moz-transition: all 0.1s ease-in-out;
  -ms-transition: all 0.1s ease-in-out;
  -o-transition: all 0.1s ease-in-out;
  transition: all 0.1s ease-in-out;
}
.ghost-input:focus {
  border-bottom:1px solid #ddd;
}
.ghost-button {
  background-color: transparent;
  border:2px solid #ddd;
  padding:10px 30px;
  width: 100%;
  min-width: 350px;
  -webkit-transition: all 0.1s ease-in-out;
  -moz-transition: all 0.1s ease-in-out;
  -ms-transition: all 0.1s ease-in-out;
  -o-transition: all 0.1s ease-in-out;
  transition: all 0.1s ease-in-out;
}
.ghost-button:hover {
  border:2px solid #515151;
}
p {
  color: #E64A19;
}

Styles from this codepen:

https://codepen.io/official_naveen/pen/rgknI

body {

width: 800px;

margin: 0 auto;

font-family: 'Open Sans', sans-serif;

}

.container {

width: 600px;

margin: 0 auto;

}

fieldset {

display: block;

-webkit-margin-start: 0px;

-webkit-margin-end: 0px;

-webkit-padding-before: 0em;

-webkit-padding-start: 0em;

-webkit-padding-end: 0em;

-webkit-padding-after: 0em;

border: 0px;

border-image-source: initial;

border-image-slice: initial;

border-image-width: initial;

border-image-outset: initial;

border-image-repeat: initial;

min-width: -webkit-min-content;

padding: 30px;

}

.ghost-input, p {

display: block;

font-weight:300;

width: 100%;

font-size: 25px;

border:0px;

outline: none;

width: 100%;

-webkit-box-sizing: border-box;

-moz-box-sizing: border-box;

box-sizing: border-box;

color: #4b545f;

background: #fff;

font-family: Open Sans,Verdana;

padding: 10px 15px;

margin: 30px 0px;

-webkit-transition: all 0.1s ease-in-out;

-moz-transition: all 0.1s ease-in-out;

-ms-transition: all 0.1s ease-in-out;

-o-transition: all 0.1s ease-in-out;

transition: all 0.1s ease-in-out;

}

.ghost-input:focus {

border-bottom:1px solid #ddd;

}

.ghost-button {

background-color: transparent;

border:2px solid #ddd;

padding:10px 30px;

width: 100%;

min-width: 350px;

-webkit-transition: all 0.1s ease-in-out;

-moz-transition: all 0.1s ease-in-out;

-ms-transition: all 0.1s ease-in-out;

-o-transition: all 0.1s ease-in-out;

transition: all 0.1s ease-in-out;

}

.ghost-button:hover {

border:2px solid #515151;

}

p {

color: #E64A19;

}

Ejecución Resultado

Crear un servidor web con un servicio que permita leer un código QR desde PowerShell

(3 votes, average: 5.00 out of 5)

Servidor web con el servicio que permite leer un código QR

# Leer un código QR
# Las funciones JavaScript se han obtenido de webqr.com

# Descargar las funciones JavaScript al equipo
#Start-BitsTransfer "https://webqr.com/webqr.js"
#Start-BitsTransfer "https://webqr.com/llqrcode.js"

$routes = @{
    
    # Cargar las funciones JavaScript
    # Es necesario quitar el caracter // porque provoca un error al leer el fichero JS

    "/webqr.js" = { return (gc ./webqr.js) | % {if(!($_ -match "// " -or $_ -match "//document" )){$_}} }

    "/llqrcode.js" = { return (gc ./llqrcode.js) }

    # Cargar el código HTML

    "/" = { return '<html>
<head>
<title>QR Code scanner</title>

<style type="text/css">
body{
    width:100%;
    text-align:center;
}
#main{
    margin: 15px auto;
    background:white;
    overflow: auto;
	width: 100%;
}
#header{
    background:white;
    margin-bottom:15px;
}
#mainbody{
    background: white;
    width:100%;
	display:none;
}

#qr-canvas{
    display:none;
}

#mp1{
    text-align:center;
    font-size:35px;
}
#imghelp{
    position:relative;
    left:0px;
    top:-160px;
    z-index:100;
    font:18px arial,sans-serif;
    background:#f0f0f0;
	margin-left:35px;
	margin-right:35px;
	padding-top:10px;
	padding-bottom:10px;
	border-radius:20px;
}
.selector{
    margin:0;
    padding:0;
    cursor:pointer;
    margin-bottom:-5px;
}
#outdiv
{
    width:320px;
    height:240px;
	border: solid;
	border-width: 3px 3px 3px 3px;
}
#result{
    border: solid;
	border-width: 1px 1px 1px 1px;
	padding:20px;
	width:70%;
}

.tsel{
    padding:0;
}

</style>

<script type="text/javascript" src="llqrcode.js"></script>
<script type="text/javascript" src="webqr.js"></script>

</head>

<body>
<div id="main">
<div id="header">
<p id="mp1">QR Code scanner</p>
</div>
<div id="mainbody">
<table class="tsel" border="0" width="100%">
<tr>
<td valign="top" align="center" width="50%">
<table class="tsel" border="0">
<tr>
<td><div class="selector" onclick="setimg()" align="right"/>Scanner</td></tr>
<tr><td colspan="2" align="center">
<div id="outdiv">
</div></td></tr>
</table>
</td>
</tr>
<tr><td colspan="3" align="center">
<div id="result"></div>
</td></tr>
</table>
</div>
</div>
<canvas id="qr-canvas" width="800" height="600"></canvas>
<script type="text/javascript">load();</script>
</body>

</html>' }

}

$url = 'http://localhost:8080/'
$listener = New-Object System.Net.HttpListener
$listener.Prefixes.Add($url)
$listener.Start()

Write-Host "Funcionando $url..."

while ($listener.IsListening)
{
    $context = $listener.GetContext()
    $requestUrl = $context.Request.Url
    $con
    $response = $context.Response

    Write-Host ''
    Write-Host "Petición: $requestUrl"

    $localPath = $requestUrl.LocalPath
    $route = $routes.Get_Item($requestUrl.LocalPath)

    if ($route -eq $null)
    {
        $response.StatusCode = 404
    }
    else
    {
        $content = & $route
        $buffer = [System.Text.Encoding]::UTF8.GetBytes($content)
        $response.ContentLength64 = $buffer.Length
        $response.OutputStream.Write($buffer, 0, $buffer.Length)
    }
    
    $response.Close()

    $responseStatus = $response.StatusCode
    Write-Host "Respuesta: $responseStatus"
}

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# Leer un código QR

# Las funciones JavaScript se han obtenido de webqr.com

# Descargar las funciones JavaScript al equipo

#Start-BitsTransfer "https://webqr.com/webqr.js"

#Start-BitsTransfer "https://webqr.com/llqrcode.js"

$routes = @{

# Cargar las funciones JavaScript

# Es necesario quitar el caracter // porque provoca un error al leer el fichero JS

"/webqr.js" = { return (gc ./webqr.js) | % {if(!($_ -match "// " -or $_ -match "//document" )){$_}} }

"/llqrcode.js" = { return (gc ./llqrcode.js) }

# Cargar el código HTML

"/" = { return '<html>

<head>

<title>QR Code scanner</title>

body{

width:100%;

text-align:center;

}

#main{

margin: 15px auto;

background:white;

overflow: auto;

width: 100%;

}

#header{

background:white;

margin-bottom:15px;

}

#mainbody{

background: white;

width:100%;

display:none;

}

#qr-canvas{

display:none;

}

#mp1{

text-align:center;

font-size:35px;

}

#imghelp{

position:relative;

left:0px;

top:-160px;

z-index:100;

font:18px arial,sans-serif;

background:#f0f0f0;

margin-left:35px;

margin-right:35px;

padding-top:10px;

padding-bottom:10px;

border-radius:20px;

}

.selector{

margin:0;

padding:0;

cursor:pointer;

margin-bottom:-5px;

}

#outdiv

{

width:320px;

height:240px;

border: solid;

border-width: 3px 3px 3px 3px;

}

#result{

border: solid;

border-width: 1px 1px 1px 1px;

padding:20px;

width:70%;

}

.tsel{

padding:0;

}

</style>

</head>

<body>

<p id="mp1">QR Code scanner</p>

</div>

<tr>

<tr>

<td><div class="selector" onclick="setimg()" align="right"/>Scanner</td></tr>

</div></td></tr>

</table>

</td>

</tr>

</td></tr>

</table>

</div>

</body>

</html>' }

}

$url = 'http://localhost:8080/'

$listener = New-Object System.Net.HttpListener

$listener.Prefixes.Add($url)

$listener.Start()

Write-Host "Funcionando $url..."

while ($listener.IsListening)

{

$context = $listener.GetContext()

$requestUrl = $context.Request.Url

$con

$response = $context.Response

Write-Host ''

Write-Host "Petición: $requestUrl"

$localPath = $requestUrl.LocalPath

$route = $routes.Get_Item($requestUrl.LocalPath)

if ($route -eq $null)

{

$response.StatusCode = 404

}

else

{

$content = & $route

$buffer = [System.Text.Encoding]::UTF8.GetBytes($content)

$response.ContentLength64 = $buffer.Length

$response.OutputStream.Write($buffer, 0, $buffer.Length)

}

$response.Close()

$responseStatus = $response.StatusCode

Write-Host "Respuesta: $responseStatus"

}

Petición desde Chrome

Resumen de las operaciones con Memoria Compartida en PHP

(5 votes, average: 5.00 out of 5)

Ejemplo resumen de las operaciones con Memoria Compartida (http://php.net/manual/es/shmop.examples-basic.php)

<?php
   
// Crear un segmento de memoria compartida de 100 bytes con un identificador igual a 0xff3
$shm_id = shmop_open(0xff3, "c", 0644, 100);
if (!$shm_id) {
    echo "Couldn't create shared memory segment\n";
}

// Obtener tamaño del segmento de memoria compartida
$shm_size = shmop_size($shm_id);
echo "SHM Block Size: " . $shm_size . " has been created.\n";

// Escribir una cadena de prueba en la memoria compartida
$shm_bytes_written = shmop_write($shm_id, "Prueba en la memoria compartida", 0);

// Ahora vamos a leer la cadena de texto
$my_string = shmop_read($shm_id, 0, $shm_size);
if (!$my_string) {
    echo "Couldn't read from shared memory block\n";
}
echo "The data inside shared memory was: " . $my_string . "\n";

//Ahora vamos a eliminar y cerrar el segmento de memoria compartida
if (!shmop_delete($shm_id)) {
    echo "Couldn't mark shared memory block for deletion.";
}
shmop_close($shm_id);
   
?>

<?php

// Crear un segmento de memoria compartida de 100 bytes con un identificador igual a 0xff3

$shm_id = shmop_open(0xff3, "c", 0644, 100);

if (!$shm_id) {

echo "Couldn't create shared memory segment\n";

}

// Obtener tamaño del segmento de memoria compartida

$shm_size = shmop_size($shm_id);

echo "SHM Block Size: " . $shm_size . " has been created.\n";

// Escribir una cadena de prueba en la memoria compartida

$shm_bytes_written = shmop_write($shm_id, "Prueba en la memoria compartida", 0);

// Ahora vamos a leer la cadena de texto

$my_string = shmop_read($shm_id, 0, $shm_size);

if (!$my_string) {

echo "Couldn't read from shared memory block\n";

}

echo "The data inside shared memory was: " . $my_string . "\n";

//Ahora vamos a eliminar y cerrar el segmento de memoria compartida

if (!shmop_delete($shm_id)) {

echo "Couldn't mark shared memory block for deletion.";

}

shmop_close($shm_id);

Para utilizar shmop tendrá que compilar PHP con el parámetro –enable-shmop en su línea de configuración. (http://php.net/manual/es/shmop.installation.php)

./php mem.php

1	./php mem.php

Cargar de forma sencilla un contenido JSON en Android con Volley y Gson

(2 votes, average: 5.00 out of 5)

content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.jesusninoc.json.MainActivity">

    <TextView
        android:id="@+id/TextResult"
        android:layout_width="315dp"
        android:layout_height="0dp"
        android:text="Resultado de JSON"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.507"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0" />

</android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.jesusninoc.json.MainActivity">

<TextView

android:id="@+id/TextResult"

android:layout_width="315dp"

android:layout_height="0dp"

android:text="Resultado de JSON"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintHorizontal_bias="0.507"

app:layout_constraintLeft_toLeftOf="parent"

app:layout_constraintRight_toRightOf="parent"

app:layout_constraintTop_toTopOf="parent"

app:layout_constraintVertical_bias="1.0" />

</android.support.constraint.ConstraintLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.jesusninoc.json">

    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.jesusninoc.json">

<uses-permission android:name="android.permission.INTERNET"/>

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

android:supportsRtl="true"

android:theme="@style/AppTheme">

<activity

android:name=".MainActivity"

android:label="@string/app_name"

android:theme="@style/AppTheme.NoActionBar">

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

MainActivity.java

package com.jesusninoc.json;

import android.app.ProgressDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import com.google.gson.Gson;

import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {

    List<Object> list;
    Gson gson;
    ProgressDialog progressDialog;
    ListView postList;
    Map<String,Object> mapPost;
    Map<String,Object> mapTitle;
    int postID;
    String postTitle[];

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RealizarPost();
    }

    public void RealizarPost() {

        StringRequest request = new StringRequest(Request.Method.GET, "https://www.jesusninoc.com/wp-json/wp/v2/posts/", new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
                gson = new Gson();
                list = (List) gson.fromJson(s, List.class);
                postTitle = new String[list.size()];

                for(int i=0;i<list.size();++i){
                    mapPost = (Map<String,Object>)list.get(i);
                    mapTitle = (Map<String, Object>) mapPost.get("title");
                    postTitle[i] = (String) mapTitle.get("rendered");
                    ((TextView)findViewById(R.id.TextResult)).append(postTitle[i]+"\n");
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Toast.makeText(MainActivity.this, "Error al procesar el JSON", Toast.LENGTH_LONG).show();
            }
        });
        
        Volley.newRequestQueue(this).add(request);
    }
}

package com.jesusninoc.json;

import android.app.ProgressDialog;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import com.android.volley.Request;

import com.android.volley.Response;

import com.android.volley.VolleyError;

import com.android.volley.toolbox.StringRequest;

import com.android.volley.toolbox.Volley;

import com.google.gson.Gson;

import java.util.List;

import java.util.Map;

public class MainActivity extends AppCompatActivity {

List<Object> list;

Gson gson;

ProgressDialog progressDialog;

ListView postList;

Map<String,Object> mapPost;

Map<String,Object> mapTitle;

int postID;

String postTitle[];

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

RealizarPost();

}

public void RealizarPost() {

StringRequest request = new StringRequest(Request.Method.GET, "https://www.jesusninoc.com/wp-json/wp/v2/posts/", new Response.Listener<String>() {

@Override

public void onResponse(String s) {

gson = new Gson();

list = (List) gson.fromJson(s, List.class);

postTitle = new String[list.size()];

for(int i=0;i<list.size();++i){

mapPost = (Map<String,Object>)list.get(i);

mapTitle = (Map<String, Object>) mapPost.get("title");

postTitle[i] = (String) mapTitle.get("rendered");

((TextView)findViewById(R.id.TextResult)).append(postTitle[i]+"\n");

}

}, new Response.ErrorListener() {

@Override

public void onErrorResponse(VolleyError volleyError) {

Toast.makeText(MainActivity.this, "Error al procesar el JSON", Toast.LENGTH_LONG).show();

}

});

Volley.newRequestQueue(this).add(request);

}

build.gradle (Module: app)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.jesusninoc.json"
        minSdkVersion 15
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
    compile 'com.android.volley:volley:1.0.0'
    compile 'com.google.code.gson:gson:2.2.+'
}

apply plugin: 'com.android.application'

android {

compileSdkVersion 26

defaultConfig {

applicationId "com.jesusninoc.json"

minSdkVersion 15

targetSdkVersion 26

versionCode 1

versionName "1.0"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

dependencies {

implementation fileTree(dir: 'libs', include: ['*.jar'])

implementation 'com.android.support:appcompat-v7:26.1.0'

implementation 'com.android.support.constraint:constraint-layout:1.0.2'

testImplementation 'junit:junit:4.12'

androidTestImplementation 'com.android.support.test:runner:1.0.1'

androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'

compile 'com.android.volley:volley:1.0.0'

compile 'com.google.code.gson:gson:2.2.+'

}

Enviar una imagen entre un cliente y un servidor con Java (Sockets TCP)

(1 votes, average: 5.00 out of 5)

Servidor

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.nio.ByteBuffer;

public class Server
{
    public static void main(String[] args)
    {
        int port=2050;
        try
        {
            ServerSocket serverSocket = new ServerSocket(port);

            Socket clientSocket = serverSocket.accept();

            InputStream inputStream = clientSocket.getInputStream();

            System.out.println(inputStream);

            byte[] imageAr = new byte[62100];
            inputStream.read(imageAr);

                BufferedImage image = ImageIO.read(new ByteArrayInputStream(imageAr));

            System.out.println("Received " + image.getHeight() + "x" + image.getWidth() + ": " + System.currentTimeMillis());
            ImageIO.write(image, "jpg", new File("C:\\Users\\juan\\Desktop\\recono\\coche2.png"));

            inputStream.close();
            clientSocket.close();
            serverSocket.close();
        }
        catch (UnknownHostException e){
            System.out.println(e);
        } catch (IOException e) {
            System.out.println(e);
        }
    }
}

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.*;

import java.net.*;

import java.nio.ByteBuffer;

public class Server

{

public static void main(String[] args)

{

int port=2050;

try

{

ServerSocket serverSocket = new ServerSocket(port);

Socket clientSocket = serverSocket.accept();

InputStream inputStream = clientSocket.getInputStream();

System.out.println(inputStream);

byte[] imageAr = new byte[62100];

inputStream.read(imageAr);

BufferedImage image = ImageIO.read(new ByteArrayInputStream(imageAr));

System.out.println("Received " + image.getHeight() + "x" + image.getWidth() + ": " + System.currentTimeMillis());

ImageIO.write(image, "jpg", new File("C:\\Users\\juan\\Desktop\\recono\\coche2.png"));

inputStream.close();

clientSocket.close();

serverSocket.close();

}

catch (UnknownHostException e){

System.out.println(e);

} catch (IOException e) {

System.out.println(e);

}

Cliente

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.nio.ByteBuffer;

public class Client
{
    public static void main(String[] args)
    {
        int port=2050;
        try
        {
            Socket clientSocket = new Socket("localhost",port);

            OutputStream outputStream = clientSocket.getOutputStream();

            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

            BufferedImage image = ImageIO.read(new File("C:\\Users\\juan\\Desktop\\recono\\coche.png"));
            ImageIO.write(image, "jpg", byteArrayOutputStream);

            byte[] size = ByteBuffer.allocate(4).putInt(byteArrayOutputStream.size()).array();
            System.out.println(byteArrayOutputStream.size());
            outputStream.write(byteArrayOutputStream.toByteArray());
            Thread.sleep(2000);

            outputStream.close();
            clientSocket.close();
        }
        catch (UnknownHostException e){
            System.out.println(e);
        }
        catch (IOException e) {
            System.out.println(e);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

import javax.imageio.ImageIO;

import java.awt.image.BufferedImage;

import java.io.*;

import java.net.*;

import java.nio.ByteBuffer;

public class Client

{

public static void main(String[] args)

{

int port=2050;

try

{

Socket clientSocket = new Socket("localhost",port);

OutputStream outputStream = clientSocket.getOutputStream();

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

BufferedImage image = ImageIO.read(new File("C:\\Users\\juan\\Desktop\\recono\\coche.png"));

ImageIO.write(image, "jpg", byteArrayOutputStream);

byte[] size = ByteBuffer.allocate(4).putInt(byteArrayOutputStream.size()).array();

System.out.println(byteArrayOutputStream.size());

outputStream.write(byteArrayOutputStream.toByteArray());

Thread.sleep(2000);

outputStream.close();

clientSocket.close();

}

catch (UnknownHostException e){

System.out.println(e);

}

catch (IOException e) {

System.out.println(e);

} catch (InterruptedException e) {

e.printStackTrace();

}

ZoomIt

(1 votes, average: 4.00 out of 5)

Introduction ZoomIt is a screen zoom and annotation tool for technical presentations that include application demonstrations. ZoomIt runs unobtrusively in the tray and activates with customizable hotkeys to zoom in on an area of the screen, move around while zoomed, and draw on the zoomed image. I wrote ZoomIt to fit my specific needs and use it in all my presentations. ZoomIt works on all versions of Windows and you can use pen input for ZoomIt drawing on tablet PCs. Using ZoomIt The first time you run ZoomIt it presents a configuration dialog that describes ZoomIt’s behavior, let’s you specify […]

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