Pavel Timofeev paveltimofeev

Nginx hints, tips & tricks

Reverse Proxy with Caching

http {
    proxy_cache_path  /data/nginx/cache  levels=1:2  keys_zone=STATIC:10m  inactive=24h  max_size=1g;
 server {

Fitnesse Hints &Tricks

Case Sensitive regexp for FitNesse:

Use =~/(?i: ... )/

-|script|
|check| eval| "CaseInsensitive"| =~/caseinsensitive/   | # fail
|check| eval| "CaseSensitive"  | =~/(?i:casesensitive)/| # success

Good storing passwords' hashes strategies

Do not store users' passwords in plain text, store hash of password instead. But only hashing is not enough, use one of these techniques, to make your users' data more protected:

simple way:

passwordHash = hash( hash(passwd) + salt )

better one - will produce different hashes for users with the same passwords:

Batch (CMD) hints, tips & tricks

"try-catch" for bat-files

my-command with parameters && (
  
  echo - my-command completed successfuly

  (call)
) || (

Bash hints, tips & tricks

Exit on Error

set -e
set -o pipefail

# -e (errexit): Abort script at first error, when a command exits with non-zero status (except in until or while loops, if-tests, list constructs)
# In case script is calling subscript inside, the pipefail option can be useful.
# -o pipefail: Causes a pipeline to return the exit status of the last command in the pipe that returned a non-zero return value.

Powershell Hints & Tricks

Convert hex to bytes, bytes to hex

function ConvertTo-Hex([byte[]]$bytes)
{
    return ($bytes | % { $_.ToString("X2") }) -join ""
}

function ConvertTo-Bytes([string]$hex)

	var os = require("os");

	//Create function to get CPU information
	function cpuAverage() {

	//Initialise sum of idle and time of cores and fetch CPU info
	var totalIdle = 0, totalTick = 0;
	var cpus = os.cpus();

	//Loop through CPU cores

	param(
	[Parameter(Mandatory=$true)]
	$source,
	[Parameter(Mandatory=$true)]
	$output,
	$header = "/// © Pavel Timofeev",
	$excludes = @("AssemblyInfo.cs", ".Designer.cs", "TemporaryGeneratedFile_" ),
	$copyAsIs = @(), # list of filemasks that should be copy as is without merge
	$addFileNames = $false, # add names of src files
	$leftComments = $false, # remove line commented with //

	<?xml version="1.0" encoding="utf-16"?>
	<StorableColorTheme xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<Keys>
	<string>ErrorForegroundColor</string>
	<string>ErrorBackgroundColor</string>
	<string>WarningForegroundColor</string>
	<string>WarningBackgroundColor</string>
	<string>VerboseForegroundColor</string>
	<string>VerboseBackgroundColor</string>
	<string>DebugForegroundColor</string>

	cls

	$text = "Hello <color clr=`"green`">World</color>"
	write-host $text

	$tag=$false
	$text.ToCharArray() \| % {

	if(!$tag){ $tag = $_ -eq "<" }