Friday, September 29, 2017
Thursday, September 28, 2017
SCP: Sending Image Using Secure Copy
Command:
$ scp ~/Desktop/Pepe.png USERNAME@SERVERNAME:/home/USERNAME
USERNAME@SERVERNAME's password:
Result:
Pepe.png
$ scp ~/Desktop/Pepe.png USERNAME@SERVERNAME:/home/USERNAME
USERNAME@SERVERNAME's password:
Result:
Pepe.png
Coinhive: Capcha Example: Using PHP
<html>
<head></head>
<body>
<div>
<?php
if(isset($_POST["coinhive-captcha-token"])){
$token = $_POST["coinhive-captcha-token"];
$secret = 'bAbbbb5A9AbA0bbbA3bAAbAb8bAbAAAb';
$url = 'https://api.coinhive.com/token/verify';
$data = array('token'=> $token,
'hashes' => 1024,
'secret' => $secret);
$options = array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_build_query($data)
);
$context = stream_context_create(array('http' => $options));
$response = json_decode(file_get_contents($url, false, $context));
if ($result === FALSE) {
echo "Error";
exit;
}
$responseSuccess = $response->success;
}
?>
<?php if ($responseSuccess){ ?>
Verified<br/>
<?php } else { ?>
You must verify
<form action="?" method="post">
<!-- other form fields -->
<script src="https://coinhive.com/lib/captcha.min.js" async></script>
<div class="coinhive-captcha" data-hashes="1024" data-key="AAAbAA33bAAbAbbAbAA4bA7dA4AAbA7b"></div>
<input type="submit" value="Submit"/>
</form>
<?php } ?>
</div>
</body>
</html>
<head></head>
<body>
<div>
<?php
if(isset($_POST["coinhive-captcha-token"])){
$token = $_POST["coinhive-captcha-token"];
$secret = 'bAbbbb5A9AbA0bbbA3bAAbAb8bAbAAAb';
$url = 'https://api.coinhive.com/token/verify';
$data = array('token'=> $token,
'hashes' => 1024,
'secret' => $secret);
$options = array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_build_query($data)
);
$context = stream_context_create(array('http' => $options));
$response = json_decode(file_get_contents($url, false, $context));
if ($result === FALSE) {
echo "Error";
exit;
}
$responseSuccess = $response->success;
}
?>
<?php if ($responseSuccess){ ?>
Verified<br/>
<?php } else { ?>
You must verify
<form action="?" method="post">
<!-- other form fields -->
<script src="https://coinhive.com/lib/captcha.min.js" async></script>
<div class="coinhive-captcha" data-hashes="1024" data-key="AAAbAA33bAAbAbbAbAA4bA7dA4AAbA7b"></div>
<input type="submit" value="Submit"/>
</form>
<?php } ?>
</div>
</body>
</html>
Wednesday, September 27, 2017
Sunday, September 24, 2017
Thursday, September 21, 2017
Javascript: Prime Number Generator
HTML/Javascript Code:
<html><head>
<meta name="viewport" content="width=device-width">
<script>
var d=document;
var primes=[];
function Prime(){
for (var i=2; i<=2000000;i++){
if (this.check(i, primes)){
primes.push(i);
d.write(i+" ");
}
}
}
Prime.prototype.check=function(i, primes){
var isOdd=i%2;
var isPrime=true;
var n=2;
if(i==2 || isOdd){
var to=Math.floor(i/2);
if (primes.length>0){
for (var j=0;j<primes.length; j++){
n=primes[j];
if(n>to){
break;
}
if(i%n==0){
isPrime=false;
break;
}
}
}
for(;n<=to;n++){
if(i%n==0){
isPrime=false;
break;
}
}
} else {
isPrime=false;
}
return isPrime;
}
function main(){
var p=new Prime();
}
</script>
</head>
<body onload="main()">default</body>
</html>
Web Inspector:
23.51s
<html><head>
<meta name="viewport" content="width=device-width">
<script>
var d=document;
var primes=[];
function Prime(){
for (var i=2; i<=2000000;i++){
if (this.check(i, primes)){
primes.push(i);
d.write(i+" ");
}
}
}
Prime.prototype.check=function(i, primes){
var isOdd=i%2;
var isPrime=true;
var n=2;
if(i==2 || isOdd){
var to=Math.floor(i/2);
if (primes.length>0){
for (var j=0;j<primes.length; j++){
n=primes[j];
if(n>to){
break;
}
if(i%n==0){
isPrime=false;
break;
}
}
}
for(;n<=to;n++){
if(i%n==0){
isPrime=false;
break;
}
}
} else {
isPrime=false;
}
return isPrime;
}
function main(){
var p=new Prime();
}
</script>
</head>
<body onload="main()">default</body>
</html>
Web Inspector:
23.51s
Monday, September 18, 2017
Tuesday, September 12, 2017
Apache HTTP Server: Redirect All HTTP Requests to HTTPS
Command:
# diff httpd.conf httpd.conf.bkup20170901
Result:
1005c1004
< <VirtualHost *:80>
---
> #<VirtualHost *:80>
1008,1009c1007
< ServerName www.SERVERNAME.com
< Redirect / https://www.SERVERNAME.com/
---
> # ServerName dummy-host.example.com
1012,1013c1010
< </VirtualHost>
<
---
> #</VirtualHost>
Reference:
https://stackoverflow.com/questions/4083221/how-to-redirect-all-http-requests-to-https/21798882#21798882
# diff httpd.conf httpd.conf.bkup20170901
Result:
1005c1004
< <VirtualHost *:80>
---
> #<VirtualHost *:80>
1008,1009c1007
< ServerName www.SERVERNAME.com
< Redirect / https://www.SERVERNAME.com/
---
> # ServerName dummy-host.example.com
1012,1013c1010
< </VirtualHost>
<
---
> #</VirtualHost>
Reference:
https://stackoverflow.com/questions/4083221/how-to-redirect-all-http-requests-to-https/21798882#21798882
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