Re: I need help regarding HttpWebRequest - C# Discussion Boards

14-Sep-05 19:59

Hi all

i m facing a problem.

I make a HttpWebRequest to a site to login . it logged in succcfullly for the first time. when i press the button and try again to login with same or diffrent user and pass it hangs on HttpWebResponse.GetResponseStream() . I need this stream to post POST data.

if i close the Application and build again and run it works fine.

Thanks in Advance

Regards

TaRiQ

TaRiQ

Andy Brummer14-Sep-05 20:37

Andy Brummer

14-Sep-05 20:37

I usually see this if I forget to close a response before making a request.

I can imagine the sinking feeling one would have after ordering my book,
only to find a laughably ridiculous theory with demented logic once the book arrives - Mark McCutcheon

Tariq Rahim14-Sep-05 21:11

14-Sep-05 21:11

thanks for reply

but i m closing the response properly and the point is that every thing works fine when i execute it for the first time but as the program is in execuation and i press the login button again to login again it stuck at HttpWebRequest.GetResponseStream().

Please tell me any hint.

Thanks in Advance

Regards
TaRiQ

TaRiQ RaHiM

Guffa14-Sep-05 21:53

14-Sep-05 21:53

Tariq Rahim wrote:
but i m closing the response properly
Are you absolutely sure about this?

Wise from many questions answered, I won't believe you until I see the code for it. Many times I have looked for errors that does not exist in code that is not even executed, just because people say it is...

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Tariq Rahim15-Sep-05 0:02

15-Sep-05 0:02

uri = new Uri("http://login.passport.net/uilogin.srf?lc=1033&id=2");
req =(HttpWebRequest)WebRequest.Create(uri.AbsoluteUri);
req.Method = "POST";
req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4433)";
req.Accept= "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*";
req.Headers.Add("Accept-Language", "en-us");
req.Headers.Add("Cache-Control","no-cache");
req.AllowWriteStreamBuffering=true;
req.KeepAlive = true;
req.Referer = "http://login.passport.com/login.srf?id=2&vv=310&lc=1033";
req.ContentType = "application/x-www-form-urlencoded";

string postdata = "mspppostint="+MSPPT;

byte[] xmlBytes = Encoding.ASCII.GetBytes(postdata);
req.ContentLength = xmlBytes.Length;
// It Stuck here in the GetReuquestStream() as i request for the login 2nd time during the execution of the program
Stream reqStream = req.GetRequestStream();

reqStream.Write(xmlBytes,0,xmlBytes.Length);

// Getting Response of Part I
Response = (HttpWebResponse)req.GetResponse();
stream = new StreamReader(Response.GetResponseStream());
responseHtml = stream.ReadToEnd();
stream.Close();
headers = Response.Headers;
Response.Close();

this is the code and it just stuck at the point where i have writen the comments so pls tell me where i m making wrong

TaRiQ RaHiM

Guffa15-Sep-05 2:09

15-Sep-05 2:09

You have to close the request stream also.

MSDN on GetRequestStream:

CAUTION You must call the Stream.Close method to close the stream and release the connection for reuse. Failure to close the stream will cause your application to run out of connections.

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| Muhammad Waqas Butt |14-Sep-05 23:58

| Muhammad Waqas Butt |

14-Sep-05 23:58

Hi Tariq,

I'm new in c#.net and i also look some this kind of resource as you working on. Please tell me detail about you project, i mean how to connection a remote web server and download file (.zip,.doc,.jpg) using Winform application.

Best Regard,

|Muhamad Waqas Butt|
waqasb4all@yahoo.com
www.sktech.freewebspace.com

Tariq Rahim15-Sep-05 0:14

problem in creation of installation patches for VS.NET deployment projects

15-Sep-05 0:14

Dear Waqas Assalam-m-Alekum

as faar as ur learning is concerned the only thing is that u can use HttpWebRequest HttpWebResponse Classess to get the HTTP Headers
and WebClient to get the File Downloaded or uploaded

for more info and Detialed Code refer to MSDN or any other site about these clasess

Regards
Tariq Rahim

TAriq

Azmal14-Sep-05 19:25

Azmal

14-Sep-05 19:25

I read the article "How to create installation patches for VS.NET deployment projects" by mjmeans.

I tried in the same way, they suggested. It works great. But it is working only First time.

I mean, I installed small project in my machine, and I made small changes in my project and created patch in the same way described in the article. I installed that patch, it works fine. Then again I made some other changes and created the patch. In the patch log, it shows correctly the changes files added in the patch. But When I execute the patch, the changes not applied to installed project. Only first time patch working.

I checked the mail address for mjmeans, but I cannot get it.

Azmal

How do you use a char* in C#?

Steve Messer14-Sep-05 19:17

Steve Messer

14-Sep-05 19:17

In C++ I recieved data from a DLLIMPORT call in a char string as follows:

void funct()
{
   char *icy=BASS_StreamGetTags( Channel, BASS_TAG_ICY);

    for (;*icy;icy+=strlen(icy)+1) 
    {
	char * lowercase;
	lowercase = _strlwr(icy);

	if (!memcmp(icy,"title :",7))
	{
	    temp = icy;
	    pCPlayer->WMA_Title = CamelCase(temp.Right(temp.GetLength() - 8));
	    TRACE("TITLE:"); TRACE( pCPlayer->WMA_Title ); TRACE( "\n");
	}
	if (!memcmp(icy,"author :",8))
	{
	    temp = icy;
	    pCPlayer->WMA_Author = CamelCase(temp.Right(temp.GetLength() - 9));
	    TRACE("AUTHOR:"); TRACE( pCPlayer->WMA_Author ); TRACE( "\n");
	}		
    }
}

In C# I am returning the data to a string. How do I walk thru the data in a C# string like I did in the above example?

Guffa14-Sep-05 21:56

14-Sep-05 21:56

How is the data arranged in the string? What is the separator between the strings in the stream? Is it still a zero character?

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Steve Messer15-Sep-05 2:03

Steve Messer

15-Sep-05 2:03

The data is a pointer to a series of null-terminated strings is returned, the final string ending with a double null.

Guffa15-Sep-05 2:25

15-Sep-05 2:25

If you have that data in a string, just split it on '\x00' and don't use the last two records in the array, as they will be the strings between the last two terminators and between the last terminator and the end of the string.

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Invalid file name characters?

Steve Messer15-Sep-05 7:55

Steve Messer

15-Sep-05 7:55

Well I ended up doing the following. When I used string as the return value I was only getting the first chuck of data and not the rest.

IntPtr icy = BASS_StreamGetTags( radioChan, BASS_TAG_ICY );

byte[] bytetag = new byte[512];
				
if (icy != IntPtr.Zero)
{
    Marshal.Copy(icy, bytetag, 0, bytetag.Length);
}

ASCIIEncoding encoding = new ASCIIEncoding( );
string constructedString = encoding.GetString(bytetag);

if (constructedString != string.Empty)
{
    string tokenizer = "\x00\0";
    string[] token = constructedString.Split( tokenizer.ToCharArray(), 13 );
}

Thanks for your help

MrR_14-Sep-05 19:10

MrR_

14-Sep-05 19:10

Hi all

Is there an easy way to check whether a string contains invalid file name characters or is this a case of "write your own".

Thanks again

MrR_

Nothing is foolproof to the talented fool.

Re: Invalid file name characters?

Vasudevan Deepak Kumar14-Sep-05 19:16

Vasudevan Deepak Kumar

14-Sep-05 19:16

A Regex Validation should achieve the trick.

Vasudevan Deepak Kumar
Personal Web: http://www.lavanyadeepak.tk/
I Blog At: http://deepak.blogdrive.com/

Re: Invalid file name characters?

mav.northwind14-Sep-05 21:42

mav.northwind

14-Sep-05 21:42

Hi!
The Path class has a static member InvalidPathChars you can use:

bool IsFilenameValid(string filename)
{
  return (filename.IndexOfAny(Path.InvalidPathChars) == -1);
}

Regards,
mav

How to set expiry date for my software

shafqaat14-Sep-05 18:59

shafqaat

14-Sep-05 18:59

HELLO

I want to set 1 Month expiry date for my software.
How can I do this.User can set system clock in back date,So how can i check this.
Using Dot Net how can I make installable setup.Should I write registry keys at time of installation.
If yes how?

Regards

Vasudevan Deepak Kumar14-Sep-05 19:10

Vasudevan Deepak Kumar

14-Sep-05 19:10

You can also have an Activation WebService and a kind of similar crosschecking validation to do this trick.

Vasudevan Deepak Kumar
Personal Web: http://www.lavanyadeepak.tk/
I Blog At: http://deepak.blogdrive.com/

shafqaat14-Sep-05 20:49

shafqaat

14-Sep-05 20:49

Webservice is notpossible in my case.There are products in market that have trial version for 1 month.After one month they got expired like Norton ani virus.Even if we set system clock in back dates..How they do this...

Ashok Dhamija14-Sep-05 20:57

Ashok Dhamija

14-Sep-05 20:57

To prevent back-date being used, implement a scheme like this:

1. At the time of installation, set the date of installation.

2. At the time of every use of software, set some variable for that date as the last date used and store it somewhere for further use. If this variable already contains a date which is later than the date of fresh use of software, do NOT reset it and let it contain that later date.

3. Next, at the time of every use of software, check for today's date. If this date is prior to the last date used stored in step 2 above, then set today's date to the aforesaid last date used. Now check the validity of software from this "revised today's date" from the date of installation and see whether it is less than 30 days or more.

Regards,
Ashok Dhamija
_____________________________
Padam Technologies