Frederick Chapleau weBlogs

Find duplicate bookmarks in chrome, and delete Dead links

Frederick.Chapleau — Tue, 27 Jul 2010 02:08:00 GMT

A great Google Chrome Extension that can find duplicate bookmarks, and search for dead links... if you want to access it, check out the options in the extension itself, in the Chrome Extensions page...

Bookmark Sentry
https://chrome.google.com/extensions/detail/bdglbbcbmgnimogcmcdenggkpdmihlga

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Screen Capture and Save to File

Frederick.Chapleau — Mon, 26 Jul 2010 02:30:00 GMT

A little code snippet that is doing a Screen Capture, saving it to a Jpeg file, and launch the default program associated to jpg to view it.

Size s = System.Windows.Forms.Screen.PrimaryScreen.Bounds.Size;
string filename = Path.GetTempFileName() + ".jpg";
using (Bitmap bitmap = new Bitmap(s.Width, s.Height))
{
    using (Graphics g = Graphics.FromImage(bitmap))
    {
        g.CopyFromScreen(new Point(0, 0), new Point(0, 0), s);
    }
    bitmap.Save(filename, ImageFormat.Jpeg);
}

Process.Start(filename);

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ServiceHost only supports class service types.

Frederick.Chapleau — Fri, 16 Jul 2010 20:37:12 GMT

In WCF, ServiceHost instantiate the class that your Service inherit, when you access the .svc file, which is not the interface, but the class itself.

Check out the .svc file (open it with the XML or Text Editor) and validate that the inherited class is the good one.

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Start a process and follow the output in C#

Frederick.Chapleau — Sun, 11 Jul 2010 21:56:00 GMT

ProcessStartInfo psi = new ProcessStartInfo(@"c:\windows\system32\ping.exe");
psi.Arguments = "127.0.0.1";
psi.RedirectStandardOutput = true;
psi.UseShellExecute = false;

Process process = Process.Start(psi);
process.WaitForExit();
string output = process.StandardOutput.ReadToEnd();
process.Dispose();

Console.WriteLine(output);
Console.ReadKey();

Google Reader API to check for Unread Article

Frederick.Chapleau — Fri, 09 Jul 2010 20:26:51 GMT

Everything you need to have a summary of unread item in your Google Reader account…!

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Xml;

namespace Chapleau.GoogleReader
{
    public class GoogleReader
    {
        private string _sid = null;
        private string _token = null;
        private string _auth = null;
        private Cookie _cookie = null;

private string _username;
private string _password;

        public GoogleReader(string username, string password)
        {
            _username = username;
            _password = password;

connect();
}

        private bool connect()
        {
            getToken();
            return _token != null;
        }
        private void getToken()
        {
            getSid();
            _cookie = new Cookie("SID", _sid, "/", ".google.com");

string url = "http://www.google.com/reader/api/0/token";

            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            req.Method = "GET";
            req.CookieContainer = new CookieContainer();
            req.CookieContainer.Add(_cookie);
            req.Headers.Add("Authorization", "GoogleLogin auth=" + _auth);

            HttpWebResponse response = (HttpWebResponse)req.GetResponse();
            using (var stream = response.GetResponseStream())
            {
                StreamReader r = new StreamReader(stream);
                _token = r.ReadToEnd();
            }
        }
        private void getSid()
        {
            string requestUrl = string.Format
                ("https://www.google.com/accounts/ClientLogin?service=reader&Email={0}&Passwd={1}",
                _username, _password);
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(requestUrl);
            req.Method = "GET";

            HttpWebResponse response = (HttpWebResponse)req.GetResponse();
            using (var stream = response.GetResponseStream())
            {
                StreamReader r = new StreamReader(stream);
                string resp = r.ReadToEnd();

                foreach (string cLine in resp.Split('\n'))
                {
                    if (cLine.StartsWith("SID=")) { _sid = cLine.Replace("SID=", ""); }
                    //if (cLine.StartsWith("LSID=")) { cLSID = cLine.Replace("LSID=", ""); }
                    if (cLine.StartsWith("Auth=")) { _auth = cLine.Replace("Auth=", ""); }
                }
            }
        }

        private HttpWebResponse httpGet(string requestUrl, string getArgs)
        {
            string url = string.Format("{0}?{1}", requestUrl, getArgs);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.CookieContainer = new CookieContainer();
            request.CookieContainer.Add(_cookie);
            request.Headers.Add("Authorization", "GoogleLogin auth=" + _auth);

            try
            {
                return (HttpWebResponse)request.GetResponse();
            }
            catch
            {
                // handle error
                return null;
            }
        }

        private HttpWebResponse httpPost(string requestUrl, string postArgs)
        {
            byte[] buffer = Encoding.GetEncoding(1252).GetBytes(postArgs);

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestUrl);
            request.Method = "POST";
            request.CookieContainer = new CookieContainer();
            request.CookieContainer.Add(_cookie);
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = buffer.Length;

Stream PostData = request.GetRequestStream();

PostData.Write(buffer, 0, buffer.Length);
PostData.Close();

            try
            {
                return (HttpWebResponse)request.GetResponse();
            }
            catch
            {
                //handle error
                return null;
            }
        }

        public int GetUnreadCount(out string details, out int numberOfFeed)
        {
            StreamReader r = new StreamReader(httpGet("http://www.google.com/reader/api/0/unread-count", "all=true&output=xml").GetResponseStream());
            string c = r.ReadToEnd();
            r.Close();

XmlDocument d = new XmlDocument();
d.LoadXml(c);

            details = string.Empty;
            int count = d.DocumentElement.SelectNodes("/object/list/object").Count;
            if(count > 0)
                count = count - 1;
            numberOfFeed = count;

            foreach(XmlElement e in d.DocumentElement.SelectNodes("/object/list/object"))
            {
                XmlElement nameNode = (XmlElement)e.SelectSingleNode("string[@name='id']");

                if (nameNode.InnerText.Contains("reading-list"))
                {
                    return int.Parse(e.SelectSingleNode("number[@name='count']").InnerText);
                }
                else
                {
                    details += e.SelectSingleNode("number[@name='count']").InnerText + " @ " + e.SelectSingleNode("string[@name='id']").InnerText + Environment.NewLine;
                }

            }
            return 0;
        }
    }
}

The Best Generic-Lazy-Initialized Singleton implementation

Frederick.Chapleau — Thu, 01 Jul 2010 13:23:03 GMT

public abstract class Singleton<T> where T: class, new() { public static T Instance { get { return Nested.instance; } } private class Nested { // Explicit static constructor to tell C# compiler // not to mark type as beforefieldinit static Nested() { } internal static readonly T instance = new T(); } } public sealed class MyType : Singleton<MyType> { }

ref. : http://stackoverflow.com/questions/953259/an-obvious-singleton-implementation-for-net/953441#953441

also http://stackoverflow.com/questions/610818/what-does-beforefieldinit-flag-do

WCF Error : The token provider cannot get tokens for target

Frederick.Chapleau — Wed, 30 Jun 2010 16:17:12 GMT

The inner exception is a much better source for this error message. The underlying message was

The NetworkCredentials provided were unable to create a Kerberos credential, see inner execption for details.

And from this exception the inner one’s detail was

InitializeSecurityContent failed. Ensure the service principal name is correct.

Adding clientCredentialType="None" solve this problem… by default it’s not None, but “Windows” which is relying on Kerberos.

<message clientCredentialType="None" negotiateServiceCredential="false" establishSecurityContext="false" />

Then, I had the problem

The service certificate is not provided for target 'http://localhost:10000/Service1.svc'. Specify a service certificate in ClientCredentials.

So I found this post on StackOverflow and remove everything under security to add only the mode to the security node to None.

<security mode="None"/>

Download .NET Framework 4.0 – Direct Link

Frederick.Chapleau — Tue, 20 Apr 2010 15:18:46 GMT

http://www.microsoft.com/downloads/details.aspx?FamilyID=9cfb2d51-5ff4-4491-b0e5-b386f32c0992&displaylang=en

It took me too long to find it (almost… 20 sec). I hope Google will index that first ;)

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Relay Permission on Exchange 2010

Frederick.Chapleau — Tue, 13 Apr 2010 20:59:38 GMT

What can I say more…

Get-ReceiveConnector "The Connector Name" | Add-ADPermission -User "NT AUTHORITY\ANONYMOUS LOGON" -ExtendedRights "ms-Exch-SMTP-Accept-Any-Recipient"

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Visual Studio setup cannot run in compatibility mode in VS2010

Frederick.Chapleau — Tue, 13 Apr 2010 13:56:25 GMT

The solution from Dluk, posted for the Beta2 Version of Visual Studio 2010 on 11/10/2009 and worked for me with the **released** version was…:

Got it!
1. Rename following registry key before install (e.g. add _ to the name):
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\setup.exe\HighVersionLie-{6B64DE21-0F4C-4479-9D6C-0FBCA496BCDC}
2. Install VS2010
3. Return key name back.

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ref.: https://connect.microsoft.com/VisualStudio/feedback/details/499921/beta2-failed-to-start-installation-visual-studio-setup-cannot-run-in-compatibility-mode

Underscore prefix with C#, is it a best practice?

Frederick.Chapleau — Mon, 01 Mar 2010 18:52:27 GMT

I used this since the beginning, thinking that this was a best practice, but without searching a lot.

I found this article containing a brief history on this practice... I’ll let you decide if it’s a best practice to you.

http://blogs.msdn.com/sourceanalysis/archive/2008/05/25/a-difference-of-style.aspx

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Atlasian: Really, really great, and almost FREE!

Frederick.Chapleau — Fri, 19 Feb 2010 16:04:36 GMT

10$ for Each of :

JIRA : The best Issue Tracker

Confluence : The best Wiki/Blog engine

… and many others!

http://www.atlassian.com/starter/

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Get the Unread count of the Inbox of Exchange 2010/2007, using web services

Frederick.Chapleau — Tue, 02 Feb 2010 14:28:40 GMT

I searched a lot and, based on an article from SANDEEP APARAJIT, I was able to query for unread email from my Exchange mailbox inbox, in about 15 min. Thanks!

ServicePointManager.ServerCertificateValidationCallback = delegate(Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };

ExchangeServiceBinding service = new ExchangeServiceBinding ();

service.RequestServerVersionValue = new RequestServerVersion();
service.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2010;
service.EnableDecompression = true;
service.Credentials = new NetworkCredential("username", "password", "domain");
service.Url = @https://exchangeserver/EWS/exchange.asmx;

int merCurrentCount = GetUnreadFolderItemsCount(service, "Inbox");

… and the functions…

public int GetUnreadFolderItemsCount(ExchangeServiceBinding service, string folderName)
       {
           int unReadCount = -1;
           // Identify the folder properties to return.
           FolderResponseShapeType properties = new FolderResponseShapeType();
           PathToUnindexedFieldType ptuft = new PathToUnindexedFieldType();
           ptuft.FieldURI = UnindexedFieldURIType.folderManagedFolderInformation;
           PathToUnindexedFieldType[] ptufts = new PathToUnindexedFieldType[1] { ptuft };
           properties.AdditionalProperties = ptufts;
           properties.BaseShape = DefaultShapeNamesType.AllProperties;

           // Form the get folder request.
           BaseFolderIdType p_folder = FindFolderID(service, folderName);

           GetFolderType request = new GetFolderType();
           request.FolderIds = new BaseFolderIdType[1] { p_folder };
           request.FolderShape = properties;

           // Send the request and get the response.
           GetFolderResponseType response = service.GetFolder(request);

           ArrayOfResponseMessagesType aormt = response.ResponseMessages;
           ResponseMessageType[] rmta = aormt.Items;
           foreach (ResponseMessageType rmt in rmta)
           {
               if (rmt.ResponseClass == ResponseClassType.Error)
               {
                   throw new Exception(rmt.MessageText);
               }
               else
               {
                   FolderInfoResponseMessageType firmt;
                   firmt = (rmt as FolderInfoResponseMessageType);
                   BaseFolderType[] folders = firmt.Folders;

                   foreach (BaseFolderType rfolder in folders)
                   {
                       if (rfolder is FolderType)
                       {
                           FolderType myFolder;
                           myFolder = (rfolder as FolderType);
                           if (myFolder.UnreadCountSpecified)
                           {
                               unReadCount = myFolder.UnreadCount;
                           }
                       }
                   }
               }
           }
           return unReadCount;
       }

       public static FolderIdType FindFolderID(ExchangeServiceBinding service, String folderName)
       {
           DistinguishedFolderIdType objSearchRootFolder = new DistinguishedFolderIdType();
           objSearchRootFolder.Id = DistinguishedFolderIdNameType.msgfolderroot;

           FindFolderType requestFindFolder = new FindFolderType();
           requestFindFolder.Traversal = FolderQueryTraversalType.Deep;
           requestFindFolder.ParentFolderIds = new DistinguishedFolderIdType[] { objSearchRootFolder };
           requestFindFolder.FolderShape = new FolderResponseShapeType();
           requestFindFolder.FolderShape.BaseShape = DefaultShapeNamesType.IdOnly;

           //Search filter definition
           requestFindFolder.Restriction = new RestrictionType();

           #region Contains expression

           ContainsExpressionType objContainsExpression = new ContainsExpressionType();
           objContainsExpression.ContainmentMode = ContainmentModeType.FullString;
           objContainsExpression.ContainmentModeSpecified = true;
           objContainsExpression.ContainmentComparison = ContainmentComparisonType.Exact;
           objContainsExpression.ContainmentComparisonSpecified = true;

           PathToUnindexedFieldType objFieldFolderName = new PathToUnindexedFieldType();
           objFieldFolderName.FieldURI = UnindexedFieldURIType.folderDisplayName;
           objContainsExpression.Item = objFieldFolderName;

           objContainsExpression.Constant = new ConstantValueType();
           objContainsExpression.Constant.Value = folderName;

           #endregion Contains expression

           requestFindFolder.Restriction.Item = objContainsExpression;

           FindFolderResponseType objFindFolderResponse =
               service.FindFolder(requestFindFolder);

           if (objFindFolderResponse.ResponseMessages.Items.Length == 0)
               return null;

           foreach (ResponseMessageType responseMsg in
               objFindFolderResponse.ResponseMessages.Items)
           {
               if (responseMsg.ResponseClass == ResponseClassType.Success)
               {
                   FindFolderResponseMessageType objFindResponse =
                       responseMsg as FindFolderResponseMessageType;
                   foreach (
                       BaseFolderType objFolderType in objFindResponse.RootFolder.Folders)
                   {
                       return objFolderType.FolderId;
                   }
               }
           }
           return null;
       }

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SSL for FREE

Frederick.Chapleau — Fri, 15 Jan 2010 14:45:58 GMT

Yes, we can now secure servers using free certificates :)

http://StartSSL.com

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The registry on a 64bits OS using NSIS

Frederick.Chapleau — Thu, 14 Jan 2010 01:10:30 GMT

Ok, after trying to find a patch or a work around to access the write 64 bit registry node instead of the Wow6432Node, I found a … not very documented but simple way to do it...

${If} ${RunningX64}
SetRegView 64
${EndIf}

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FH_DATE_PAST_20XX in SpamAssassin not working in 2010

Frederick.Chapleau — Sat, 02 Jan 2010 17:26:57 GMT

Yep, it was a bug, but it’s corrected now, 3 Steps to follow:

1. Change the mirrors

Edit the file /var/lib/spamassassin/3.002003/updates_spamassassin_org/MIRRORED_BY and add

http://daryl.dostech.ca/sa-update/asf/ weight=5
http://www.sa-update.pccc.com/ weight=5

2. Run sa-update

3. Run sa-Compile

… or you can simply patch it by editing the file /etc/mail/spamassassin/local.cf and add

score FH_DATE_PAST_20XX 0

And you are done :)

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gPXE chaining / DHCP / TFTP / TGT / iSCSI to boot Windows 7 Diskless!

Frederick.Chapleau — Sat, 14 Nov 2009 19:58:03 GMT

By default the LUN number is 0, when you insert in the dhcp server

iscsi:ServerAddress.x.com::::iqn.2009-11.com.x:test

The problem is that TGT is by default assigning 0 to the controller of the iSCSI drive, and the LUN number for the device itself is 1.

So you must assign the value 1 to the definition.

iscsi:ServerAddress.x.com:::1:iqn.2009-11.com.x:test

… if you don’t assign it, you will get error “ 0x1d704039 ", or PXENV_STATUS_TFTP_CANNOT_READ_FROM_CONNECTION.

-f.

BTW, here is my configs…

dhcpd.conf

#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.sample
#
allow booting;
allow bootp;

option space gpxe;
option gpxe.bus-id code 177 = string;
option gpxe-encap-opts code 175 = encapsulate gpxe;
option gpxe.keep-san code 8 = unsigned integer 8;

subnet 10.0.0.0 netmask 255.255.255.0 {
        range 10.0.0.200 10.0.0.220;
        authoritative;
        next-server 10.0.0.1;
        if not exists gpxe.bus-id {
                filename "gpxe.kpxe";
        } else {
                filename "";
                option root-path "iscsi:10.0.0.1:::1:iqn.2009-11.com.x:test";
                option gpxe.keep-san 1;
        }
}
ddns-update-style ad-hoc;
option time-servers 10.0.0.10;
option domain-name "x.com";
option routers 10.0.0.1;
option ntp-servers 10.0.0.1;
option domain-name-servers 10.0.0.1;
option subnet-mask 255.255.255.0;

targets.conf

<target iqn.2009-11.com.x:test>
backing-store /san/disk1
</target>

Configure FileStream in SQL Server 2008

Frederick.Chapleau — Mon, 26 Oct 2009 16:39:04 GMT

It’s not only a setting in the insance properties, you must also configure it using the SQL Server Configuration Manager.

I had this problem when importing the AdventureWorksCycle 2008 database, and I found this article really helpfull.

ref.: http://techpunch.wordpress.com/2008/08/29/how-to-enable-filestream-feature-on-sql-server-2008/

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Using WCF Webservices in .NET 2.0

Frederick.Chapleau — Mon, 14 Sep 2009 17:00:21 GMT

The default behavior of WCF Webservice is the new wsHttpBinding. This is not compatible with .NET 2.0, so to use it you must change the behavior with the basicHttpBinding.

The basic one is not secured, so if it’s a critical piece, you must use it with SSL.

-f.

ref.: http://www.slickit.ca/2009/04/wcf-using-wcf-with-net-20.html

This collection already contains an address with scheme http.

Frederick.Chapleau — Sat, 12 Sep 2009 16:02:06 GMT

When deploying a WCF service, this problem can occur

This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.
Parameter name: item

This is caused by having multiple binding on the Website (like domain.com and www.domain.com).

The solution was simply to add a entry in the serviceHostingEnvironment section of the web.config, check out the reference for the complete solution.

warning: this cause the server to reject everything that is not configured in the baseAddressPrefixFilters.

-f.

ref.: http://blogs.msdn.com/rampo/archive/2008/02/11/how-can-wcf-support-multiple-iis-binding-specified-per-site.aspx

404 Error when deploying a .net 3.0+ SVC File

Frederick.Chapleau — Sat, 12 Sep 2009 15:49:09 GMT

When deploying a .NET WCF Service on IIS 7, on might have a 404 error.

This is because the ScriptsMaps are not registered, issuing the following command register them, to that they can be used.

c:\Windows\Microsoft.Net\Framework\v3.0\Windows Communication Foundation\servicemodelreg.exe –i

-f.

ref.: http://forums.asp.net/t/1432444.aspx

Change SQL Server Instance Name

Frederick.Chapleau — Mon, 20 Jul 2009 14:14:30 GMT

After looking around a lot, I found this article that is really accurate, when you changed the server name, and not the SQL Server Instance name...

http://www.coderjournal.com/2008/02/how-to-change-instance-name-of-sql-server/

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The log cannot be rebuilt when the primary file is read-only.

Frederick.Chapleau — Wed, 08 Jul 2009 22:27:08 GMT

When mounting a SQL Server Express Database, the SQL Server Express engine is trying to rebuild the log files, using the same permissions as the AppPool that is configured for the website. So this account should have access to the underneath file system. Try giving Network Service Account read/write permissions on the App_Data folder...

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cannot generate sspi context. .net sqlclient data provider

Frederick.Chapleau — Wed, 08 Jul 2009 17:38:58 GMT

I had this, and found a lot of posts for it... here is an other “simple” solution: change de provider name to Named Pipe, it this case the SSPI context is generating correctly.

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DNS Error when activating Windows 2008

Frederick.Chapleau — Tue, 07 Jul 2009 17:00:47 GMT

If you receive this error when activating Windows 2008, change the product key to use a MAK product key (I think it’s a volumen license key) and not a MSDN product key (RTL).

Windows Activation Error
A problem occurred when Windows tried to activate. Error Code 0x8007232B.
For a possible resolution, click More Information.
Contact your system administratior or technical support department for
assistance.
More Information says -> Code: 0x8007232B, Description: DNS name does not
exists.

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