Install Graphviz and PyGraphviz on Mac


Use brew to install graphviz, then add install option when using pip to install pygraphviz

brew install graphviz

pip install pygraphviz –install-option=”–include-path=/usr/local/lib/graphviz/” –install-option=”–library-path=/usr/local/lib/graphviz”

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Shell – Check SSL Certificate


Just a few minutes after trying to check domain’s SSL Certificate expiry date with python which requires around ten lines of code, I found a shell script which doing that task in just one line, here’s the script

#!/bin/bash

echo | openssl s_client -servername example.com -connect example.com:443 2>/dev/null | openssl x509 -noout -dates

 

source:

Python – Check SSL Certificate Expiry Date


Just playing with python 3 to make a simple utility to check my domain expiry date

# save as check_ssl.py

import OpenSSL
import ssl, socket
import argparse

# get domain
parser = argparse.ArgumentParser()
parser.add_argument(“domain”)
args = parser.parse_args()
domain = args.domain

# get SSL Cert info
cert = ssl.get_server_certificate((domain, 443))
x509 = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, cert)
x509info = x509.get_notAfter()

exp_day = x509info[6:8].decode(‘utf-8’)
exp_month = x509info[4:6].decode(‘utf-8’)
exp_year = x509info[:4].decode(‘utf-8’)

exp_date = str(exp_day) + “-” + str(exp_month) + “-” + str(exp_year)

print(“SSL Certificate for domain”, domain, “will be expired on (DD-MM-YYYY)”, exp_date)

then run with the domain you want to check as the argument

python check_ssl.py example.com

 

jQuery : Select All Checkbox


Yahoo! Mail and GMail both has a checkbox on top of their email list which will “checked” all chekboxes when clicked. Previously I use plain old javascript like those in this link, I just try to use jQuery to do this, its only 5 lines

$('#selectAll').click(function(event){
    $('input[type="checkbox"]').each(function(){
        this.checked = event.target.checked;
    });
});

Android Studio Error on First Run (Windows)


After installing Android Studio on my new laptop and then running it for the first time, it throw a dialog box detailing error messages, a quick search on Google point me to this link Issue 172032: Android Studio Start failed with internal error and the “temporary solution” is simple, just edit idea.properties file located in

C:\Program Files\Android\Android Studio\bin\

then add this text

disable.android.first.run=true

and save, then try to relaunch Android Studio, it works like a charm 🙂

Note: editing idea.properties file required Administrator privileges so you maybe need to launch your editor as Administrator