WalterInSH’s gists

WalterInSH / add-ssh-key.sh

Created July 11, 2016 04:37

add a ssh key on servers

	#!/bin/sh

	SSH_KEY="key"

	if [ -f ~/.ssh/authorized_keys ] && [ $(grep -c "$SSH_KEY" ~/.ssh/authorized_keys) -gt 0 ]; then

	echo "ssh key exists"
	else
	if [ -f ~/.ssh/authorized_keys ]; then
	cp ~/.ssh/authorized_keys ~/.ssh/authorized_keys.bak

WalterInSH / angularjs_watch_list

Created July 14, 2015 10:44

angularjs watch list. avoid duplicated watching

	$scope.watcher_switches = [];

	$scope.add_status_watcher = function () {
	//stop watching
	angular.forEach($scope.watcher_switches, function (value) {
	value();
	});
	//bind new watchers
	var new_watchers = [];

WalterInSH / angular-http-error-handler.js

Created May 25, 2015 07:19

angular http error handler

	/**
	* AngularJS v1.3.15
	*/
	var app = angular.module('fds-punisher', modules, function ($routeProvider, $locationProvider, $httpProvider) {
	$httpProvider.interceptors.push(function($q) {
	return {
	'responseError': function(rejection) {
	var status = rejection.status;

	if (status == 400) {

WalterInSH / StringFormatter.java

Created May 5, 2014 09:46

format a string

	/**
	* User: walter
	* Date: 5/5/14
	* Time: 5:09 PM
	*/
	public class StringFormatter {

	static final String DELIM_STR = "{}";

	/**

WalterInSH / CRC32.java

Created March 6, 2014 02:42

CRC32

	public static long getCRC32(String _source) throws UnsupportedEncodingException {
	int crc = 0xFFFFFFFF; // initial contents of LFBSR
	int poly = 0xEDB88320; // reverse polynomial
	byte[] bytes = _source.getBytes("utf-8");
	for (byte b : bytes) {
	int temp = (crc ^ b) & 0xff;

	// read 8 bits one at a time
	for (int i = 0; i < 8; i++) {
	if ((temp & 1) == 1)

WalterInSH / RSA.java

Created February 20, 2014 09:27

RSA algorithm

	package me.faolou.util;

	/*************************************************************************
	* Compilation: javac RSA.java
	* Execution: java RSA N
	*
	* Generate an N-bit public and private RSA key and use to encrypt
	* and decrypt a random message.
	*
	*

WalterInSH / MillerRabin

Created February 20, 2014 05:48

Miller Rabin primality test

	private boolean passesMillerRabin(int iterations, Random rnd) {
	// Find a and m such that m is odd and this == 1 + 2*a m
	BigInteger thisMinusOne = this.subtract(ONE);
	BigInteger m = thisMinusOne;
	int a = m.getLowestSetBit();
	m = m.shiftRight(a);

	// Do the tests
	if (rnd == null) {
	rnd = getSecureRandom();

WalterInSH / Pagination.java

Last active November 27, 2020 23:01

pagination

	import org.codehaus.jackson.annotate.JsonIgnore;

	/**
	* User: walter
	* Date: 12/8/13
	* Time: 10:53 AM
	*/
	public class Pagination {

	// 每页显示数量

WalterInSH / ExcelUtils.java

Last active November 24, 2020 02:58

generate excel dynamically

	import org.apache.commons.beanutils.PropertyUtils;
	import org.apache.commons.collections.CollectionUtils;
	import org.apache.commons.lang.StringUtils;
	import org.apache.commons.lang.math.NumberUtils;
	import org.apache.commons.lang.time.DateFormatUtils;
	import org.apache.poi.ss.usermodel.*;
	import org.apache.poi.xssf.usermodel.XSSFCell;
	import org.apache.poi.xssf.usermodel.XSSFWorkbook;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

WalterInSH / logback.xml

Created February 8, 2014 06:27

logback configuration

	<?xml version="1.0" encoding="UTF-8"?>
	<!-- <configuration debug="true"> 调试模式下，可输出logback的内部日志信息 -->
	<configuration debug="false">


	<!-- 控制台输出 -->
	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
	<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
	<!--格式化输出：%d表示日期，%thread表示线程名，%-5level：级别从左显示5个字符宽度%msg：日志消息，%n是换行符 [%file:%line]日志所在文件及行数 %msg%n消息及换行-->
	<pattern>%d{yyyy-MM-dd HH:mm:ss} [%level][%thread]:%logger{50} [%method:%line] %msg%n</pattern>

Walter WalterInSH