CategoryUncategorized

Online conference software aka meetings

J May, 2017 / guda

If you want your developers and stuff to be happy please AVOID webex !

Webex is bad service

It has bad International connection. It doesn’t run on linux or unix and can’t be run in a browser. The IOS application is bad and doesn’t integrate with the links. The integration with the website and the calendars is bad. The website is slow and buggy and you can’t see the meeting on which you are invited. It is the worst of the software out there.

Zoom – It is like the webex. They look and feel the same one idea better, because it has client which can run in linux

Good one

https://www.bluejeans.com/ – works perfectly!

http://appear.in – free and great!

Sending a bunch of data to Zabbix with one request

J January, 2017 / guda

One can send a bunch of key => values to zabbix with the zabbix-trapper items.

Using this nice article as a base I have packed everthing in a class so that you can use it:

Example usage:

values = {
  total_ram: 0,
  wrong_data_center: 0,
  linode_hosts: 0,
  missing_from_zabbix: 0,
  missing_from_graylog: 0,
}

zabbix_sender = ZabbixSender.new(Figaro['zabbix_server'])
zabbix_sender.message('super_druper_hostname', values)

values = {

total_ram: 0,

wrong_data_center: 0,

linode_hosts: 0,

missing_from_zabbix: 0,

missing_from_graylog: 0,

}

zabbix_sender = ZabbixSender.new(Figaro['zabbix_server'])

zabbix_sender.message('super_druper_hostname', values)

require 'json'

class ZabbixSender

  def initialize zabbix_host
    @zabbix_host = zabbix_host
  end

  def message hostname, values
    values_with_host = with_host(hostname, values)

    params = {
      "request" => "sender data",
      "data" => values_with_host,
    }

    body = JSON.generate params
    data_length = body.bytesize
    data_header = "ZBXD\1".encode("ascii") + \
    [data_length].pack("i") + \
    "\x00\x00\x00\x00"
    data_to_send = data_header + body

    send data_to_send
  end

  private

  def with_host hostname, hash
    values = []

    hash.each_pair do |key, value|
      values << {
        key: key,
        value: value,
        host: hostname,
      }
    end
    values
  end

  def send data_to_send
    socket = TCPSocket.new(@zabbix_host, 10051)
    socket.write data_to_send.to_s
    response_header = socket.recv(5)
    if not response_header == "ZBXD\1"
      puts "response: #{response_header}"
      raise 'Got invalid response'
    end

    response_data_header = socket.recv(8)
    response_length = response_data_header[0,4].unpack("i")[0]
    response_raw = socket.recv(response_length)
    socket.close
    response = JSON.load(response_raw)
  end

end

require 'json'

class ZabbixSender

def initialize zabbix_host

@zabbix_host = zabbix_host

end

def message hostname, values

values_with_host = with_host(hostname, values)

params = {

"request" => "sender data",

"data" => values_with_host,

}

body = JSON.generate params

data_length = body.bytesize

data_header = "ZBXD\1".encode("ascii") + \

[data_length].pack("i") + \

"\x00\x00\x00\x00"

data_to_send = data_header + body

send data_to_send

end

private

def with_host hostname, hash

values = []

hash.each_pair do |key, value|

values << {

key: key,

value: value,

host: hostname,

}

end

values

end

def send data_to_send

socket = TCPSocket.new(@zabbix_host, 10051)

socket.write data_to_send.to_s

response_header = socket.recv(5)

if not response_header == "ZBXD\1"

puts "response: #{response_header}"

raise 'Got invalid response'

end

response_data_header = socket.recv(8)

response_length = response_data_header[0,4].unpack("i")[0]

response_raw = socket.recv(response_length)

socket.close

response = JSON.load(response_raw)

end

Tired of the old Rails scaffold?

J January, 2017 / guda

Why Rails scaffold doesn’t work

The need to write a replacement of the Rails scaffold was because the build in one in Ruby on Rails:

Does not support namespaces on the controllers and the models it generates funny paths in the views and/or controllers
The native way to extend the Rails scaffold was changed frequently I have to spend hours tracing github issues
It uses the ugly scaffold.css and it generates it all the time breaking my styles
Does some freaky copy/paste optimizations in the controller to get the model. Scaffold should be a starting point from where with few deletes or add few lines of codes to make a usable screen.

The new approach

With scaffold_pico you can create your own pretty administration in a second.

No learning curve – if you know Rails you know it.
No 3rd party gems slowing your development/production startup times.
Clean code
Supports namespaces in the models and the controllers

There is also some sugar. With the pico_scaffold you can generate from the beginning fabricators and take care of N+1 by specifying joins/includes clauses. There is separation of the fields for index and editing. There is a search – almost every screen now days has search.

Supports Zurb Foundation, Materializecss CSS frameworks

Here is the github: https://github.com/gudata/scaffold_pico

Learning programming languages

J November, 2016 / guda

learn programming

challenges

mentoring

https://www.codementor.io/tips/6543378221/a-slightly-slimmed-down-version-of-the-official-select2-ajax-example-on-how-to-have-an-ajax-powered-autocomplete-dropdown

Optimizations

javascript
- https://github.com/Kikobeats/js-mythbusters
ruby
- https://www.rubytapas.com/

Algorithms

https://www.quora.com/What-are-the-most-learner-friendly-resources-for-learning-about-algorithms
https://www.analyticsvidhya.com/learning-paths-data-science-business-analytics-business-intelligence-big-data/
http://bigocheatsheet.com/
bulgaria
- http://cs.maycamp.com/?page_id=83
линейна алгребра
- http://immersivemath.com/ila/index.html
курсове
- http://videolectures.net/mit6046jf05_introduction_algorithms/

Функционално програмиране

https://github.com/hristozov/fpkn1617

Academies

Online help

https://www.codementor.io/experts

Conferences

ruby
- http://rubyc.eu/

quizes

https://projecteuler.net/

Remove the mysql root password on development

J August, 2016 / guda

The world is going crazy. The mysql manual for 5.7.3 is not working.

Here is how to remove the password…

Jailbreak 9.3.3 and afterwards

J August, 2016 / guda

It is easy. You have to do it! Just save the jailbreak and the Cydia impactor so that you can do the Jailbrake in April 2017.

What I have installed again and is working was:

Name	What it does?	From repo
Activator	Shortcuts everywhere
OpenSSH
iCleaner Pro 7.3.0	Claims it free disks space	http://exile90software.com/cydia/beta
FlipControlCenter	Manage shortcut icons
AppCake	Download pirate games	http://cydia.iphonecake.com/
AudioRecorder 2 $	call recorder	http://limneos.net/repo
	Alternative apps: Call Recorder	http://hacx.org/repo/
dnscrypt-proxy	crypt your dns	http://limneos.net/repo
albumshot	Smart albums for all apps	http://limneos.net/repo
SpringBoard	move fast through the screens	http://limneos.net/repo
Thireus Extra Recommended Tools		http://limneos.net/repo
IPPeek	show the IP on the clock. Use it from activator
Aquaboard	Fencypency effects	http://limneos.net/repo
Spоtilife alternatives: SpotiuM BDaySpotify 2	Unlocks some features on the spotify app	http://repo.hackyouriphone.org/
GameGem and GamePlayer	Game cheating tool	research more here
SystemSoundDisabler	Disable all kind of anoying sounds
LocalIAPStore iOS 9	Inapp purchases for free	Canolli
Minimal hosts blocker	Ads blocker	https://reddestdream.github.io/

No time to install

Bridge – import music to Music from http://canolli.yourepo.com/
from: https://cydia.angelxwind.net/
https://www.yourepo.com/repo/canolli/pack/bridge – tring now and want to try those also
AppSync Unified – you need this to install unsinged ipa files.

iFile – from here http://www.sinfuliphonerepo.com/
PhotosLive from http://limneos.net/repo

https://appaddict.org/ios-app/ – trying now

TERMINALS

it has nice list of shortcuts, works bad on ios 9.3.3
MobileTerminal (mine bad choice) from Karens repo https://cydia.angelxwind.net/ which is on the same code base iOS Terminal form BigBoss

MTerminal works good – from the BigBoss repo.

http://repo.thireus.com – install recommended ios9/ios8/ios7 hacker tools, this includes “newterm” which is updated through ios9. The hacker package installs a bunch of command line utilities like ping, nmap, get, top wget, etc as well. otherwise if you just want terminal just install newterm.

Tried but not using

vShare
killbackground8
BioProtect – protect apps with the touch ID
Cameratweak4 http://repo.hackyouriphone.org/ (the release there is not properly cracked)

Filesystem

How to clean your photos:

Backup/Delete /private/var/mobile/Media/DCIM
Delete /private/var/mobile/Media/PhotoData

SQLite

Emails database:  /private/var/mobile/Library/Mail/Envelope Index 
  sqlite> pragma table_info(messages);

Calendar database: /private/var/mobile/Library/Calendar/Calendar.sqlitedb
  pragma table_info(ABPerson);

Phone numbers database: /private/var/mobile/Library/AddressBook/AddressBook.sqlitedb 
  pragma table_info(event);

Call History database: /private/var/mobile/Library/CallHistory/call_history.db 
  sqlite> pragma table_info(call);

SMS database: /private/var/mobile/Library/SMS/sms.db
  sqlite> pragma table_info(message);

Emails database: /private/var/mobile/Library/Mail/Envelope Index

sqlite> pragma table_info(messages);

Calendar database: /private/var/mobile/Library/Calendar/Calendar.sqlitedb

pragma table_info(ABPerson);

Phone numbers database: /private/var/mobile/Library/AddressBook/AddressBook.sqlitedb

pragma table_info(event);

Call History database: /private/var/mobile/Library/CallHistory/call_history.db

sqlite> pragma table_info(call);

SMS database: /private/var/mobile/Library/SMS/sms.db

sqlite> pragma table_info(message);

More on this on limneos blog

plutil from Erica Utillities – is used to modify the .plist files

Links

https://twitter.com/limneos – the author of audiorecord2

http://dantheman827.github.io/ios-app-signer/

http://iphone.mob.org/ nice source of game downloads

Pirate Sources

http://quanganh9x.info/quanganh9x.php

Latest iphones jailbrake

https://github.com/axi0mX/ipwndfu

case vs if

J July, 2016 / guda

I notice that a lot of people are writing tons of ifs instead of use the case operator.

The case operator is much more readable. It can do more work than the ifs. And it should be faster by definition. Unfortunately in ruby it is faster only in > 2.x

With case you compare objects and match multiple values.

Good readings for today

J March, 2016 / guda

https://github.com/karldray/quantum

Valid docker container/image names

J January, 2016 / guda

Valid container names are: [a-zA-Z0-9][a-zA-Z0-9_.-]
as pointed here

And probably the valid container names are
hostnameComponentRegexp = match((?:[a-z0-9]|[a-z0-9][a-z0-9-]*[a-z0-9]))

as pointed
here

Ansible multistage vault file