skanga’s gists

skanga / clock.html

Created February 18, 2019 21:02

Analog + Digital Clock (using SVG, CSS & JS) that scales to any screen size

	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>Scalable Analog + Digital Clock (using SVG, CSS & JS)</title>
	<style>
	* {
	padding: 0;
	margin: 0;
	box-sizing: border-box;
	}

skanga / gist:39353a02142cbc26cc8cd339ffcfe2dc

Created December 27, 2018 11:06

Upgrade TLS on Centos 5 by building WGET, CURL and OPENSSL from scratch


	# Download, compile and install openssl
	mkdir ~/src/
	cd ~/src/
	wget https://www.openssl.org/source/openssl-1.0.2a.tar.gz
	tar -zxvf openssl-*.tar.gz
	cd openssl-*
	./config -fpic shared
	make
	sudo make install

skanga / HttpsNoVerify.java

Created December 21, 2018 18:25

Fetch an HTTPS URL with NO verification and BLINDLY trusting all hosts


	// NOTE: It is IRRESPONSIBLE to use this in any production type environment or with even remotely valuable data

	import java.io.InputStream;
	import java.io.OutputStream;
	import java.io.IOException;
	import java.security.cert.X509Certificate;
	import java.security.SecureRandom;
	import javax.net.ssl.HttpsURLConnection;
	import javax.net.ssl.SSLContext;

skanga / HttpServer.java

Last active June 1, 2018 01:22

Feature rich web server in around 500 lines using pure JDK classes only. Features include file server, dir listing, basic auth, https (self-signed or let's encrypt), file upload, multithreading, access logging, etc.


	import com.sun.net.httpserver.*;
	import javax.net.ssl.*;
	import java.io.*;
	import java.net.*;
	import java.nio.file.*;
	import java.security.*;
	import java.security.cert.*;
	import java.text.*;
	import java.util.*;

skanga / StringTemplate.java

Last active February 21, 2019 17:43

Simple string templates for java. The template can be in the code or in an external file, and any type of delimiters may be used for the variables. The data is provided in a HashMap.


	import java.io.IOException;
	import java.lang.StringBuilder;
	import java.nio.charset.Charset;
	import java.nio.charset.StandardCharsets;
	import java.nio.file.Files;
	import java.nio.file.Paths;
	import java.util.HashMap;

	public class StringTemplate

skanga / runpipe.c

Last active April 1, 2018 02:06

Here's an example of how to pipe an arbitrary number of commands together using C including input and output redirection. The demo example in main() executes the command "grep nologin < /etc/passwd | awk "{print $1}" | sort > zzz". In case you do not need the file redirection then either one or both can be set to NULL.

	/**
	* gcc -o runpipe runpipe.c && ./runpipe
	*/

	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <string.h>
	#include <fcntl.h>
	#include <sys/types.h>

skanga / SingleFileHTTPServer.java

Created December 8, 2017 19:53

Multi threaded HTTP server in Java that will only serve 1 single file for ANY http request


	import java.io.BufferedInputStream;
	import java.io.BufferedOutputStream;
	import java.io.File;
	import java.io.InputStream;
	import java.io.IOException;
	import java.io.OutputStream;
	import java.net.ServerSocket;
	import java.net.Socket;
	import java.net.URLConnection;

skanga / Jetty 8 Embedded Proxy Server

Created August 22, 2017 16:41

	/*
	"%JAVA_HOME%\bin\javac" -cp .;lib\; JettyProxyServer.java && "%JAVA_HOME%\bin\java" -cp .;lib\; JettyProxyServer
	*/

	import org.eclipse.jetty.server.Connector;
	import org.eclipse.jetty.server.handler.ConnectHandler;
	import org.eclipse.jetty.server.handler.HandlerList;
	import org.eclipse.jetty.server.Handler;
	import org.eclipse.jetty.server.Server;
	import org.eclipse.jetty.server.nio.SelectChannelConnector;

skanga / genhaar.bat

Created July 24, 2017 21:32

Train HAAR cascades with OpenCV 3.2 on windows

	@echo off

	REM SETUP
	REM Download opencv-3.2.0-vc14.exe from https://github.com/opencv/opencv/releases
	REM Extract it and then copy all executables from ..\opencv-3.2.0-vc14\build\x64\vc14\bin\ into .\bin
	REM Place BMP positive images into .\positives and JPG negative images into .\negatives and then run this script

	REM REFERENCES:
	REM https://www.academia.edu/9149928/A_complete_guide_to_train_a_cascade_classifier_filter
	REM http://johnallen.github.io/opencv-object-detection-tutorial/

skanga / DownloadGithubLatest.sh

Created July 20, 2017 21:52


	# Download latest release of a specific file from a Github repo
	REPO_OWNER='PowerShell'
	REPO_NAME='Win32-OpenSSH'
	ARTIFACT_NAME=OpenSSH-Win64.zip

	ARTIFACT_URL=$(curl -sL https://api.github.com/repos/${REPO_OWNER}/${REPO_NAME}/releases/latest \| jq --raw-output '.assets[] \| .browser_download_url' \| grep ${ARTIFACT_NAME})
	curl -sLO $ARTIFACT_URL