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Aleksandar N. Kostadinov akostadinov

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akostadinov / post_string_file.rb
Created January 26, 2017 10:19
ruby rest-client posting String as a file multipart/form-data
# rest-client recognizes files in multipart/form-data by checking
# the object type passed as the field content. We need to craft
# our string to appear as a file IO. `#stringfile` does that.
# An alternative approach is to just write string to a file and
# pass file IO to rest-client but this would be suboptimal
# provided we already have the content as a String.
def stringfile(string,
filename="file_#{rand 100000}",
type=MIME::Types.type_for("xml").first.content_type)
@akostadinov
akostadinov / quine.rb
Created January 26, 2017 09:42
my first suboptimal ruby quine
pr = %q{puts %{pr = %q{#{pr}}}, pr}
puts %{pr = %q{#{pr}}}, pr
@akostadinov
akostadinov / rails_test.rb
Last active November 9, 2016 21:40
Rails Active Record simple test
# run by `ruby rails_test.rb`
# credits to https://github.com/rails/rails/issues/13744#issuecomment-32670636
gem 'activerecord', '5.0.0.1'
require 'active_record'
require 'minitest/autorun'
require 'logger'
# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)
@akostadinov
akostadinov / stack_trace.sh
Last active February 20, 2025 05:44
Get stack trace in Bash shell script/program.
# LICENSE: MIT, wtfpl or whatever OSS license you like
function get_stack () {
STACK=""
local i message="${1:-""}"
local stack_size=${#FUNCNAME[@]}
# to avoid noise we start with 1 to skip the get_stack function
for (( i=1; i<$stack_size; i++ )); do
local func="${FUNCNAME[$i]}"
[ x$func = x ] && func=MAIN
local linen="${BASH_LINENO[$(( i - 1 ))]}"
@akostadinov
akostadinov / wsse_xml.rb
Last active June 13, 2016 14:59
generate XML WSSE credentials with the simple `wsse` gem.
require 'io/console'
require 'wsse'
header = WSSE::header('username', STDIN.noecho(&:gets).chomp)
def wsse_xml(user, password)
raw = WSSE::header(user, password)
# username = raw.gsub(/^.* Username="(.*)", PasswordDigest=".*(?!PasswordDigest)$/, '\\1')
digest = raw.gsub(/^.*, PasswordDigest="(.*)", Nonce=".*$/, '\\1')
nonce = raw.gsub(/^.*, Nonce="(.*)", Created=".*$/, '\\1')
#!/usr/bin/env ruby
# see https://github.com/sparklemotion/nokogiri/issues/1200
require 'nokogiri'
src =<<EOD
<wrapper xmlns="ns">
<record xml:id="r1" xmlns:extra="extra">
<field>aaa</field>
@akostadinov
akostadinov / add_child_ns_nokogiri_bug.rb
Last active June 9, 2016 09:49 — forked from gioele/add_child_ns.rb
Nokogiri `add_child` does not copy namespaces
#!/usr/bin/env ruby
# see https://github.com/sparklemotion/nokogiri/issues/1200
require 'nokogiri'
src =<<EOD
<wrapper xmlns="ns">
<record xml:id="r1" xmlns:extra="extra">
<field>aaa</field>
=begin
Copyright (c) 2015 Red Hat inc
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
@akostadinov
akostadinov / arch_comp.rb
Last active August 29, 2015 14:12
find duplicate files (WIP)
require 'fileutils'
# this is ugly quickly hacked script, not very nice and reliable at the moment
# it finds what files from one archive need to be backed-up (i.e. are not present in some other archive dir)
# $ find new_dir -type f > arch.txt
# $ find old_dir -type f > arch_old.txt
# `find -name ".?*" -prune -o -type f` to avoid hidden files
# cat to_arch.txt | xargs -d "\n" stat -c "%s" | awk '{size+=$1} END {print size}' # to see size of files to copy
# sudo rsync -avx --files-from=to_arch.txt ./ /path/to/store/backup
# TODO: get files fast hash (md5?) and compare based on it; avoid external tools like find
@akostadinov
akostadinov / fb2ical.php
Last active August 29, 2015 14:09 — forked from phibo23/fb2ical.php
<?php
/*
original code by cogitom: https://gist.github.com/997980/
phibo23: https://gist.github.com/2808256/
This script reads future events (plus several days into the past) from Facebook pages
and creates a subscribable iCalendar
Improvements upon the original version:
- avoid setting DTEND field if facebook event lacks an end time