Network Programming in .NET

SELECT * FROM [database].sys.objects WHERE type = ‘P’

This gives the following fields:

name 
object_id 
principal_id
schema_id  
parent_object_id
type
type_desc                                                   
create_date            
modify_date            
is_ms_shipped
is_published
is_schema_published

{
	// InvokeRequired required compares the thread ID of the
	// calling thread to the thread ID of the creating thread.
	// If these threads are different, it returns true.
	if (this.textBox1.InvokeRequired)
	{	
		SetTextCallback d = new SetTextCallback(SetText);
		this.Invoke(d, new object[] { text });
	}
	else
	{
		this.textBox1.Text = text;
	}
}

Which omits the code for the SetTextCallback delegate, which over time, can clutter up your application.

Instead, I would suggest using an Action<T> as follows:

var d = new Action<string>(SetText);

I’ve noticed that NS records in DNS also work on a round robbin feature, NS records also alternate.

This implies that you could create a distributed load balancer with failover using only DNS

Server A ip (Multihomed; 1.1.1.1 and 1.1.100.1)
NS NS1.SERVER.COM
NS NS2.SERVER.COM
A NS1 1.1.1.1
A NS2 1.1.100.1
A www 1.1.1.1

Server B ip (Multihomed; 2.2.2.2 and 2.2.200.2)
NS NS1.SERVER.COM
NS NS2.SERVER.COM
A NS2 2.2.2.2
A NS1 2.2.200.2
A www 2.2.2.2

SERVER.COM delegated with nameservers NS1.SERVER.COM and NS2.SERVER.COM

Now, the A records are not load balanced but the NS records are.

So theoretically, a DNS client, connecting randomly to NS1 or NS2 will be given either 1.1.1.1 or 2.2.2.2 as an IP address, depending
on what nameserver it contacted.

If the DNS on NS1 goes down, then the client will automatically contact NS2. and be given server 2’s IP address. The logic being, that if the DNS
server is down, the webserver probobly is too.

In this case, the A records are not load balanced but the NS records are.

I assume this would not get past ZoneCheck for delegation of some top level domains like .fr, .de  or .no, but it might work for a .com

Just search for

Site:reverse.me.uk + hashcode

I managed to retrieve a lost password that was Hashed in a MySQL database..

mysql> select * from admins;
+——–+———-+———————————-+
| userid | username | password                         |
+——–+———-+———————————-+
|      4 | admin    | 1752017eea2e45fbXXXXXXXXXX |
|      5 | nktest   | 1752017eea2e45f1fXXXXXXXXXX |
+——–+———-+———————————-+

– And, yes, I’ve put X’s in there, just in case…

the site, reverse.me.uk has about 5 million hash codes, covering most of the shorter passwords, so beware!

An ASP.NET setting has been detected that does not apply in
Integrated managed pipeline mode.

I was using a component called FreeTextBox, which adds the following line into Web.Config

<httpHandlers>
            <add verb="GET" path="FtbWebResource.axd" type="FreeTextBoxControls.AssemblyResourceHandler, FreeTextBox"/>
</httpHandlers>

This however, is not compatible with IIS7,

Quick fix is to take the app pool out of Integrated mode. So, go to your website on IIS 7, Press "Advanced Settings", and it will say the name of the Application Pool. Then go to application pools, click on the offenting pool, and select "Advanced Settings", then under "Managed Pipeline mode" change it
from Integrated to Classic. No restart of IIS is required.

                float x = (float)12.34;
                double y = x;

What value is y?
12.34000015258789

If you really have to use floats, then this is an easy fix

double y = (double)(decimal)x;

Http status 417: expectation failed

Reading posts on the net said this could be a proxy problem, but I wasn’t using a proxy, so this wasn’t it. The solution appeared
as this little gem:

ServicePointManager.Expect100Continue = false;

 

I guess the server must have responded with a HTTP 100, which was not expected by the client, or vice versa. The Webservice
itself appeared to be hosted on a non-.net platform.

root@vps ~ # /etc/init.d/apache2 restart
Forcing reload of web server (apache2)…httpd (no pid file) not running
(99)Cannot assign requested address: make_sock: could not bind to address 78.110.167.104:80
no listening sockets available, shutting down
Unable to open logs
 failed!
You have mail in /var/mail/root

*Panic!*

I was aware that my host were chaning IP addresses, for some time, and this was the old IP address that the server was trying to bind to.
So, I found that by editing /etc/apache2/ports.conf and removing the old IP addresses, then restarting apache again, the server
was back up again.

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