Chris Haynie » code

Clipboard Snippeteering

sax — Thu, 26 Aug 2010 23:36:48 +0000

I work in IT and frequently you may need to send someone a screenshot. Maybe its the configuration screen you’re looking at or the output of a command. As many of you know this procedure usually involves hitting print-screen on your keyboard, pasting it into a photo editor like ms-paint, saving it as a jpeg and what… do you send it over IM with a direct connection? email it to them? I wanted a solution where I can easily take a screenshot of just an area of the screen, or the entire screen if I choose and have it automatically upload the screenshot to a webserver, and allow me to paste the URL to the screenshot instantly. Ideally, I would have it even put the URL IN my clipboard as well, as it turns out this is all exactly what I accomplished.

I run Ubuntu on my workstation with compiz. You will need to install compizconfig-settings-manager, xsel, and ImageMagick for this all to work. Below is the script to perform the screenshot auto-magic, when combined with the compiz screenshot plugin. I press the windows key on my keyboard and then click+drag I have an instant screenshot.

FNAME="/home/chrisha/Documents/snippets/$(date +%s|md5sum|awk '{print $1}').jpg"
 
/usr/bin/convert -bordercolor white -border 5 $1 $1
/usr/bin/convert -bordercolor black -border 1 $1 $1
/usr/bin/convert -quality 75 $1 $FNAME
 
scp $FNAME slice:public_html/dev.chrishaynie.com/html/snippets/
 
echo http://slice.chrishaynie.com/snippets/$(basename $FNAME)|xsel -i
 
rm -f $1

Now then, lets say you want to send a large block of text – maybe its a snippet of code, maybe its the output of a command. Taking a screenshot of text isn’t verfy efficient, which we can agree. Traditional solutions have been just pasting it into the chat window and spamming the receiver, using sites like pastebin.com, but now your text is publicly available, maybe you’re wanting to send a snippet of some proprietary code or personal conversation.

My buddy Tim over at http://h1tman.com/ advanced my above screenshot auto-upload to include text excerpts, which get uploaded as plain-text. You bind his script to a keyboard shortcut and from there, you select the text, hit the keyboard shortcut and you’re off and running. You can read his full howto in depth here http://www.h1tman.com/2010/08/clipboard-hacks-social-copypasta

Now we get to the good part, I’ve combined both my original “screenshotuploader” with Tim’s “textshot” into what I’m going to call snippets. Use the same script in the screenshot plugin and in your keyboard shortcut for textshots, use the same url and same folder to store them all, in one combined script below.

#!/bin/bash
 
DIR="/home/chrisha/Documents/snippets/"
HOST="slice.chrishaynie.com"
HASH="$(date +%s|md5sum|awk '{print $1}')"
FNAME="$DIR$HASH"
 
if [ -z $1 ]
then
	FNAME="$FNAME.txt"
	xsel>$FNAME
else
	FNAME="$FNAME.jpg"
	/usr/bin/convert -bordercolor white -border 5 $1 $1
	/usr/bin/convert -bordercolor black -border 1 $1 $1
	/usr/bin/convert -quality 75 $1 $FNAME
	rm -f $1
fi
 
scp $FNAME $HOST:public_html/dev.chrishaynie.com/html/snippets/
echo http://slice.chrishaynie.com/snippets/$(basename $FNAME)|xsel -i

Python Threading

sax — Mon, 29 Jun 2009 21:14:31 +0000

In order to speed up some of my scripts I’ve implemented threading using python. Some scripts now run in 1/10th the time they used to as a result. Here I will try to illustrate some of the key points, hopefully it will be useful to anyone.

#!/usr/bin/python
import sys
import subprocess
from threading import Thread
 
class MyThread(Thread):
    def __init__(self,server,cmd):
        Thread.__init__(self)
        self.server = server
        self.cmd = cmd
        self.status = -1
    def run(self):
        proc = subprocess.Popen('ssh %s %s' % (self.server,self.cmd),
                       shell=True,
                       stdin=subprocess.PIPE,
                       stdout=subprocess.PIPE,
                       stderr=subprocess.STDOUT,
                       )
        self.stdout, self.stderr = proc.communicate()
 
servers = ['shell1.example.net','ssh2.mhost.com','examplebox.net']
command = 'uptime'
cmdlist = []
for srv in servers:
    run = MyThread(srv,command)
    cmdlist.append(run)
    run.start()
 
for c in cmdlist:
    c.join()
    print "### %s:n%s" % (c.server,c.stdout),
print "## Done"

In my example we loop through servers[] and for each server[] we run the specified command on them, in their own thread! 3 servers in the above example, not a big deal, what if you have 20 servers? 40 servers? huge speed improvement.

The script can be easily extended to say… read the servers list in from a configuration file, or accept the ‘command’ from the command line arguments, (argv[1:]) etc.

Enjoy.

Code test

sax — Wed, 12 Nov 2008 05:55:47 +0000

Test

public class Hello {
  public static void main(String[] args) {
    System.out.println("Hello World!");
  }
}

class Example
  def example(arg1)
    return "Hello: " + arg1.to_s
  end
end