Generic Makefile for Go

If you want to have a directory with alot of Go files for testing you can use this Makefile.

# Generic Makefile for GO
ifeq ($(GOARCH),386)
O:=8
else
O:=6
endif

GC=${O}g
LD=${O}l

GO_FILES = $(wildcard *.go)
GO_PRGS = $(basename $(GO_FILES))
GO_OBJS = $(addsuffix .$O, $(GO_PRGS))

all: $(GO_PRGS)

$(GO_PRGS): $(GO_OBJS)
        $(LD) -o $@ $@.$O;

$(GO_OBJS): %.$O: %.go
        $(GC) $<
 
clean:
        rm $(GO_OBJS) $(GO_PRGS)

Gstickies a notes program for gnome released under GPLv2

You can find it for free at GitHub:

https://github.com/QubeX2/gstickies

//QubeX2

Tips #2 Add javascript: click() prototype to HTMLElement's for Firefox etc.

If you want to use the click() method on a HTML element on a webbrowser other than Microsoft's Internet Explorer you can add this code at the start somewhere of your code.

if(typeof HTMLElement!='undefined'&&!HTMLElement.prototype.click)
    HTMLElement.prototype.click=function(){
        var evt = this.ownerDocument.createEvent('MouseEvents');
        evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
        this.dispatchEvent(evt);
    }

//QubeX2

Problem #1 How to encrypt data between PHP and C#

One important note. When you want to encrypt the data on the
C# side you have to pad the iv to length of 32.


In PHP encrypt data like this:
<?php
$iv= "01234567890123456789012345678901";
$key= "this is they key"; 
$text= "This text will be encrypted..."; 
$bsize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC);
$pad= $bsize - (strlen($text) % $bsize);
$text .= str_repeat(chr($pad), $pad);
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv);
$enc_text = base64_encode($encrypted);
 
echo "$enc_text";

/* the output
 *  MCfBJe4H7U+9Qb48RkHlXUt1/it10mx+TG7lrCUjO4w=
 */
?>

In C# decrypt data like this:

using System;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace Encryption
{
    class MainClass
    {
        public static void Main (string[] args)
        {
            string enc_text = @"MCfBJe4H7U+9Qb48RkHlXUt1/it10mx+TG7lrCUjO4w=";
            string iv = "01234567890123456789012345678901";
            string key = "this is they key";
            byte[] bytes = Base64_Decode(enc_text);
            Console.WriteLine(Decrypt(bytes, key, iv));
        }

        public static byte[] Base64_Decode (string str)
        {
            return Convert.FromBase64String (str);
        }
        
        public static string Decrypt (byte[] cipher, string key, string iv)
        {
            string retVal = "";
            UTF8Encoding encoding = new UTF8Encoding ();
            byte[] Key = encoding.GetBytes (key);
            byte[] IV = encoding.GetBytes (iv);
            using (RijndaelManaged rj = new RijndaelManaged ()) {
                try {
                    rj.Padding = PaddingMode.PKCS7;
                    rj.Mode = CipherMode.CBC;
                    rj.KeySize = 256;
                    rj.BlockSize = 256;
                    rj.Key = Key;
                    rj.IV = IV;
                    using (MemoryStream ms = new MemoryStream (cipher)) {
                        using (CryptoStream cs = new CryptoStream (ms, rj.CreateDecryptor (Key, IV), CryptoStreamMode.Read)) {
                            using (StreamReader sr = new StreamReader (cs)) {
                                retVal = sr.ReadLine ();
                            }
                        }
                    }
                } finally {
                    rj.Clear ();
                }
            }
            return retVal;
        }
    }
}

//QubeX2

Tips #1 Batch resize images with Bash

find ./ -iname "*.jp*" -exec /-mogrify -resize 800 {} \;

The argument -iname makes find match case insensitive.
The argument -exec continues until it finds a backslash escaped ; eg. "\;".

Good luck
/QubeX2

Att använda Javascript i Windows Forms

Ett litet exempel på hur man kan använda Javascript i Windows Forms

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using MSScriptControl;

namespace Blog.Script
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            ScriptControlClass script = new ScriptControlClass();
            script.Language = "JScript";
            script.AddCode("var v = 10;");

            StringBuilder js = new StringBuilder();
            js.AppendLine("function max(x,y){ return x > y ? x : y; }");
            js.AppendLine("max(v,3);");

            string result = "";

            try
            {
                result = script.Eval(js.ToString()).ToString();
            }
            catch
            {
                result = script.Error.Line + "," + script.Error.Column + " " + script.Error.Description;
            }
            MessageBox.Show(result);
        }
    }
}